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}\\n\\nfunction _possibleConstructorReturn(self, call) { if (call && (_typeof(call) === \\\"object\\\" || typeof call === \\\"function\\\")) { return call; } return _assertThisInitialized(self); }\\n\\nfunction _assertThisInitialized(self) { if (self === void 0) { throw new ReferenceError(\\\"this hasn't been initialised - super() hasn't been called\\\"); } return self; }\\n\\nfunction _getPrototypeOf(o) { _getPrototypeOf = Object.setPrototypeOf ? Object.getPrototypeOf : function _getPrototypeOf(o) { return o.__proto__ || Object.getPrototypeOf(o); }; return _getPrototypeOf(o); }\\n\\nfunction _inherits(subClass, superClass) { if (typeof superClass !== \\\"function\\\" && superClass !== null) { throw new TypeError(\\\"Super expression must either be null or a function\\\"); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, writable: true, configurable: true } }); if (superClass) _setPrototypeOf(subClass, superClass); }\\n\\nfunction _setPrototypeOf(o, p) { _setPrototypeOf = Object.setPrototypeOf || function _setPrototypeOf(o, p) { o.__proto__ = p; return o; }; return _setPrototypeOf(o, p); }\\n\\n\\n\\n/**\\n * Wrap the last X words in an HTML tag to prevent them from wrapping (i.e. orphans)\\n * @param {HTMLElement} el - Toggle button DOM node\\n * @param {Object} opts - Options\\n * @param {string} [opts.expandedClasses=\\\"\\\"] - Class(es) to apply when expanded\\n * @param {boolean} [opts.shouldToggleHeight=false] - Whether or not to animate height\\n * @param {string} [opts.activeToggleText=\\\"\\\"] - Expanded state toggle button text\\n * @param {boolean} [opts.shouldStartExpanded=false] - Whether menu should start expanded\\n * @param {function} [opts.onReady=\\\"\\\"] - Ready callback function\\n */\\n\\nvar ExpandToggle =\\n/*#__PURE__*/\\nfunction (_EventEmitter) {\\n  _inherits(ExpandToggle, _EventEmitter);\\n\\n  function ExpandToggle(el, opts) {\\n    var _this;\\n\\n    _classCallCheck(this, ExpandToggle);\\n\\n    // Have to call super() first before referencing “this” since we’re extending EventEmitter\\n    // https://stackoverflow.com/a/43591507/673457\\n    _this = _possibleConstructorReturn(this, _getPrototypeOf(ExpandToggle).call(this));\\n    _this.el = el;\\n    _this.targetId = _this.el.getAttribute(\\\"data-expands\\\");\\n    _this.targetEl = document.getElementById(_this.targetId); // Ensure target element exist before initializing\\n\\n    if (!_this.targetEl) {\\n      console.warn(\\\"Can\\\\u2019t find expandable target with id \\\\u201C\\\".concat(_this.targetId, \\\"\\\\u201D\\\"));\\n      return _possibleConstructorReturn(_this, false);\\n    } // Use Object.assign() to merge “opts” object with default values in this.options\\n\\n\\n    _this.options = Object.assign({}, {\\n      expandedClasses: \\\"\\\",\\n      // string, accepts multiple space-separated classes\\n      shouldToggleHeight: false,\\n      // should target element’s height be animated using max-height\\n      activeToggleText: \\\"\\\",\\n      // expanded state toggle button text\\n      shouldStartExpanded: false,\\n      // component starts expanded on init\\n      onReady: null // ready callback function\\n\\n    }, opts); // Check for custom expanded class(es)\\n\\n    _this.expandedClasses = _this.el.getAttribute(\\\"data-expands-class\\\") || _this.options.expandedClasses;\\n\\n    if (_this.expandedClasses.length) {\\n      // Check if active class string contains multiple classes\\n      if (_this.expandedClasses.indexOf(\\\" \\\") > -1) {\\n        // Convert to array and remove any empty string values\\n        // caused by having multiple spaces in a row.\\n        _this.expandedClasses = _this.expandedClasses.split(\\\" \\\").filter(function (n) {\\n          return n.length;\\n        });\\n      } else {\\n        // We still need to convert a single active class to an array\\n        // so we can use the spread syntax later in classList.add()\\n        _this.expandedClasses = [_this.expandedClasses];\\n      }\\n    } // Check if height should be animated\\n\\n\\n    _this.shouldToggleHeight = _this.el.hasAttribute(\\\"data-expands-height\\\") || _this.options.shouldToggleHeight; // Check if component should start expanded\\n\\n    _this.shouldStartExpanded = _this.el.hasAttribute(\\\"data-expanded\\\") || _this.options.shouldStartExpanded; // Check for custom toggle button text to use when expanded\\n\\n    _this.hasActiveText = false;\\n    _this.textEl = _this.el.querySelector(\\\"[data-expands-text]\\\");\\n\\n    if (_this.textEl) {\\n      _this.defaultToggleText = _this.textEl.textContent;\\n      _this.activeToggleText = _this.textEl.getAttribute(\\\"data-expands-text\\\") || _this.options.activeToggleText;\\n      _this.hasActiveText = !!_this.activeToggleText.length;\\n    }\\n\\n    _this.init();\\n\\n    return _this;\\n  }\\n\\n  _createClass(ExpandToggle, [{\\n    key: \\\"init\\\",\\n    value: function init() {\\n      // Store state to avoid calling resize handler after component has been destroyed\\n      this.hasInitialized = true; // Accessibility setup\\n\\n      this.el.setAttribute(\\\"aria-haspopup\\\", true);\\n      this.el.setAttribute(\\\"aria-expanded\\\", this.shouldStartExpanded); // Omit “aria-controls” for now\\n      // See https://inclusive-components.design/menus-menu-buttons/#ariacontrols\\n      // this.el.setAttribute(\\\"aria-controls\\\", this.targetId);\\n\\n      this.targetEl.setAttribute(\\\"aria-hidden\\\", !this.shouldStartExpanded);\\n\\n      if (this.el.tagName.toLowerCase() === \\\"a\\\") {\\n        this.el.setAttribute(\\\"role\\\", \\\"button\\\");\\n      }\\n\\n      if (this.shouldToggleHeight) {\\n        this.heightToggleSetup();\\n      } // Click event listener on toggle button\\n      // Note: Callback needs to be assigned to a let so we can remove it since we’re using bind()\\n      // https://stackoverflow.com/a/22870717/673457\\n\\n\\n      this.clickHandler = this.toggle.bind(this);\\n      this.el.addEventListener(\\\"click\\\", this.clickHandler); // Keyboard listeners on toggle button\\n\\n      this.keydownHandler = this.keyboardEvents.bind(this);\\n      this.el.addEventListener(\\\"keydown\\\", this.keydownHandler); // Check for onReady callback\\n\\n      if (typeof this.options.onReady === \\\"function\\\") {\\n        this.options.onReady();\\n      }\\n    }\\n  }, {\\n    key: \\\"destroy\\\",\\n    value: function destroy() {\\n      this.hasInitialized = false; // Remove event listeners\\n\\n      this.el.removeEventListener(\\\"click\\\", this.clickHandler);\\n      this.el.removeEventListener(\\\"keydown\\\", this.keydownHandler);\\n      window.removeEventListener(\\\"resize\\\", this.resizeHandler); // Remove aria attributes\\n\\n      this.el.removeAttribute(\\\"aria-haspopup\\\");\\n      this.el.removeAttribute(\\\"aria-expanded\\\");\\n      this.targetEl.removeAttribute(\\\"aria-hidden\\\");\\n      this.targetEl.style.removeProperty(\\\"max-height\\\");\\n\\n      if (this.el.tagName.toLowerCase() === \\\"a\\\") {\\n        this.el.removeAttribute(\\\"role\\\");\\n      } // Reset toggle text\\n\\n\\n      if (this.hasActiveText) {\\n        this.textEl.textContent = this.defaultToggleText;\\n      } // Remove custom classes\\n\\n\\n      if (this.expandedClasses.length) {\\n        var _this$el$classList, _this$targetEl$classL;\\n\\n        (_this$el$classList = this.el.classList).remove.apply(_this$el$classList, _toConsumableArray(this.expandedClasses));\\n\\n        (_this$targetEl$classL = this.targetEl.classList).remove.apply(_this$targetEl$classL, _toConsumableArray(this.expandedClasses));\\n      }\\n\\n      this.emitEvent(\\\"destroy\\\");\\n    }\\n  }, {\\n    key: \\\"keyboardEvents\\\",\\n    value: function keyboardEvents(event) {\\n      // Expand with down arrow\\n      if (event.keyCode == 40) {\\n        this.expand();\\n      } else if (event.keyCode == 38 || event.keyCode == 27) {\\n        // Close with up arrow or escape key\\n        this.collapse();\\n      }\\n    }\\n  }, {\\n    key: \\\"heightToggleSetup\\\",\\n    value: function heightToggleSetup() {\\n      var _this2 = this;\\n\\n      this.targetParentEl = this.targetEl.parentNode; // Set max-height to the expanded height so we can animate it.\\n\\n      window.requestAnimationFrame(this.updateExpandedHeight.bind(this));\\n      this.resizeHandler = lodash_debounce__WEBPACK_IMPORTED_MODULE_0___default()(function (event) {\\n        // Due to debounce() it’s possible for this to run after destroy() has been called.\\n        // To avoid this edge case, check “this.hasInitialized” first.\\n        if (_this2.hasInitialized) {\\n          window.requestAnimationFrame(_this2.updateExpandedHeight.bind(_this2));\\n        }\\n      }, 100).bind(this); // Update target element’s max-height on resize\\n\\n      window.addEventListener(\\\"resize\\\", this.resizeHandler);\\n    } // Set max-height of target element to its expanded height without triggering relayout.\\n    //\\n    // This technique works by creating an absolutely-positioned invisible clone of the target\\n    // element and calculating its height. This avoids any relayout that would otherwise occur\\n    // if the element was briefly expanded so we could measure it.\\n    //\\n    // Note: We’re using CSS to transition max-height instead jQuery’s slideToggle(),\\n    //       or another 3rd-party lib like Velocity.js, to avoid loading a large lib.\\n\\n  }, {\\n    key: \\\"updateExpandedHeight\\\",\\n    value: function updateExpandedHeight() {\\n      // Get width of original element so we can apply it to the clone\\n      var nodeWidth = Math.round(parseFloat(this.targetEl.offsetWidth)); // Create clone of node\\n\\n      var cloneEl = this.targetEl.cloneNode(true); // 'true' includes child nodes\\n      // Inline styles added to prevent reflow, ensure clone is same size as expanded element\\n\\n      cloneEl.style.cssText = \\\"max-height: none !important; position: absolute !important; right: 100% !important; visibility: hidden !important; width: \\\".concat(nodeWidth, \\\"px !important; -webkit-transition: none !important; -moz-transition: none !important; transition: none !important\\\"); // Update “aria-hidden” attribute\\n\\n      cloneEl.setAttribute(\\\"aria-hidden\\\", false); // Remove id just to be safe\\n\\n      cloneEl.removeAttribute(\\\"id\\\"); // Remove “name” attributes to prevent resetting checkbox or radio elements\\n\\n      var childElsWithId = cloneEl.querySelectorAll(\\\"[name]\\\"); // IE-friendly way of iterating over a NodeList\\n\\n      Array.prototype.forEach.call(childElsWithId, function (el) {\\n        el.removeAttribute(\\\"name\\\");\\n      }); // Append clone to document, save as new let so we can remove it later\\n\\n      var newEl = this.targetParentEl.insertBefore(cloneEl, this.targetEl); // Calculate height\\n\\n      var expandedHeight = Math.round(parseFloat(newEl.offsetHeight)); // Remove cloned node to clean up after ourselves\\n\\n      this.targetParentEl.removeChild(newEl); // Apply inline max-height to collapsed element\\n      // Note: CSS is overriding this when aria-hidden=\\\"true\\\"\\n\\n      this.targetEl.style.maxHeight = expandedHeight + \\\"px\\\";\\n    }\\n  }, {\\n    key: \\\"expand\\\",\\n    value: function expand(event) {\\n      // Update toggle text\\n      if (this.hasActiveText) {\\n        this.textEl.textContent = this.activeToggleText;\\n      } // Add classes\\n\\n\\n      if (this.expandedClasses.length) {\\n        var _this$el$classList2, _this$targetEl$classL2;\\n\\n        (_this$el$classList2 = this.el.classList).add.apply(_this$el$classList2, _toConsumableArray(this.expandedClasses));\\n\\n        (_this$targetEl$classL2 = this.targetEl.classList).add.apply(_this$targetEl$classL2, _toConsumableArray(this.expandedClasses));\\n      } // Update aria attributes\\n\\n\\n      this.el.setAttribute(\\\"aria-expanded\\\", true);\\n      this.targetEl.setAttribute(\\\"aria-hidden\\\", false); // Emit event and include original event as an argument\\n\\n      this.emitEvent(\\\"expand\\\", event);\\n    }\\n  }, {\\n    key: \\\"collapse\\\",\\n    value: function collapse(event) {\\n      // Update toggle text\\n      if (this.hasActiveText) {\\n        this.textEl.textContent = this.defaultToggleText;\\n      } // Remove classes\\n\\n\\n      if (this.expandedClasses.length) {\\n        var _this$el$classList3, _this$targetEl$classL3;\\n\\n        (_this$el$classList3 = this.el.classList).remove.apply(_this$el$classList3, _toConsumableArray(this.expandedClasses));\\n\\n        (_this$targetEl$classL3 = this.targetEl.classList).remove.apply(_this$targetEl$classL3, _toConsumableArray(this.expandedClasses));\\n      } // Update aria attributes\\n\\n\\n      this.el.setAttribute(\\\"aria-expanded\\\", false);\\n      this.targetEl.setAttribute(\\\"aria-hidden\\\", true); // Emit event and include original event as an argument\\n\\n      this.emitEvent(\\\"collapse\\\", event);\\n    }\\n  }, {\\n    key: \\\"toggle\\\",\\n    value: function toggle(event) {\\n      // Prevent default in case toggle element is a link instead of a button\\n      event.preventDefault();\\n\\n      if (this.el.getAttribute(\\\"aria-expanded\\\") === \\\"true\\\") {\\n        this.collapse(event);\\n      } else {\\n        this.expand(event);\\n      }\\n    }\\n  }]);\\n\\n  return ExpandToggle;\\n}(ev_emitter__WEBPACK_IMPORTED_MODULE_1___default.a);\\n\\n\\n\\n//# sourceURL=webpack://%5Bname%5DLink/./index.js?\");\n\n/***/ }),\n\n/***/ \"./node_modules/ev-emitter/ev-emitter.js\":\n/*!***********************************************!*\\\n  !*** ./node_modules/ev-emitter/ev-emitter.js ***!\n  \\***********************************************/\n/*! no static exports found */\n/***/ (function(module, exports, __webpack_require__) {\n\neval(\"var __WEBPACK_AMD_DEFINE_FACTORY__, __WEBPACK_AMD_DEFINE_RESULT__;/**\\n * EvEmitter v1.1.0\\n * Lil' event emitter\\n * MIT License\\n */\\n\\n/* jshint unused: true, undef: true, strict: true */\\n\\n( function( global, factory ) {\\n  // universal module definition\\n  /* jshint strict: false */ /* globals define, module, window */\\n  if ( true ) {\\n    // AMD - RequireJS\\n    !(__WEBPACK_AMD_DEFINE_FACTORY__ = (factory),\\n\\t\\t\\t\\t__WEBPACK_AMD_DEFINE_RESULT__ = (typeof __WEBPACK_AMD_DEFINE_FACTORY__ === 'function' ?\\n\\t\\t\\t\\t(__WEBPACK_AMD_DEFINE_FACTORY__.call(exports, __webpack_require__, exports, module)) :\\n\\t\\t\\t\\t__WEBPACK_AMD_DEFINE_FACTORY__),\\n\\t\\t\\t\\t__WEBPACK_AMD_DEFINE_RESULT__ !== undefined && (module.exports = __WEBPACK_AMD_DEFINE_RESULT__));\\n  } else {}\\n\\n}( typeof window != 'undefined' ? window : this, function() {\\n\\n\\\"use strict\\\";\\n\\nfunction EvEmitter() {}\\n\\nvar proto = EvEmitter.prototype;\\n\\nproto.on = function( eventName, listener ) {\\n  if ( !eventName || !listener ) {\\n    return;\\n  }\\n  // set events hash\\n  var events = this._events = this._events || {};\\n  // set listeners array\\n  var listeners = events[ eventName ] = events[ eventName ] || [];\\n  // only add once\\n  if ( listeners.indexOf( listener ) == -1 ) {\\n    listeners.push( listener );\\n  }\\n\\n  return this;\\n};\\n\\nproto.once = function( eventName, listener ) {\\n  if ( !eventName || !listener ) {\\n    return;\\n  }\\n  // add event\\n  this.on( eventName, listener );\\n  // set once flag\\n  // set onceEvents hash\\n  var onceEvents = this._onceEvents = this._onceEvents || {};\\n  // set onceListeners object\\n  var onceListeners = onceEvents[ eventName ] = onceEvents[ eventName ] || {};\\n  // set flag\\n  onceListeners[ listener ] = true;\\n\\n  return this;\\n};\\n\\nproto.off = function( eventName, listener ) {\\n  var listeners = this._events && this._events[ eventName ];\\n  if ( !listeners || !listeners.length ) {\\n    return;\\n  }\\n  var index = listeners.indexOf( listener );\\n  if ( index != -1 ) {\\n    listeners.splice( index, 1 );\\n  }\\n\\n  return this;\\n};\\n\\nproto.emitEvent = function( eventName, args ) {\\n  var listeners = this._events && this._events[ eventName ];\\n  if ( !listeners || !listeners.length ) {\\n    return;\\n  }\\n  // copy over to avoid interference if .off() in listener\\n  listeners = listeners.slice(0);\\n  args = args || [];\\n  // once stuff\\n  var onceListeners = this._onceEvents && this._onceEvents[ eventName ];\\n\\n  for ( var i=0; i < listeners.length; i++ ) {\\n    var listener = listeners[i]\\n    var isOnce = onceListeners && onceListeners[ listener ];\\n    if ( isOnce ) {\\n      // remove listener\\n      // remove before trigger to prevent recursion\\n      this.off( eventName, listener );\\n      // unset once flag\\n      delete onceListeners[ listener ];\\n    }\\n    // trigger listener\\n    listener.apply( this, args );\\n  }\\n\\n  return this;\\n};\\n\\nproto.allOff = function() {\\n  delete this._events;\\n  delete this._onceEvents;\\n};\\n\\nreturn EvEmitter;\\n\\n}));\\n\\n\\n//# sourceURL=webpack://%5Bname%5DLink/./node_modules/ev-emitter/ev-emitter.js?\");\n\n/***/ }),\n\n/***/ \"./node_modules/lodash/_Symbol.js\":\n/*!****************************************!*\\\n  !*** ./node_modules/lodash/_Symbol.js ***!\n  \\****************************************/\n/*! no static exports found */\n/***/ (function(module, exports, __webpack_require__) {\n\neval(\"var root = __webpack_require__(/*! ./_root */ \\\"./node_modules/lodash/_root.js\\\");\\n\\n/** Built-in value references. */\\nvar Symbol = root.Symbol;\\n\\nmodule.exports = Symbol;\\n\\n\\n//# sourceURL=webpack://%5Bname%5DLink/./node_modules/lodash/_Symbol.js?\");\n\n/***/ }),\n\n/***/ \"./node_modules/lodash/_baseGetTag.js\":\n/*!********************************************!*\\\n  !*** ./node_modules/lodash/_baseGetTag.js ***!\n  \\********************************************/\n/*! no static exports found */\n/***/ (function(module, exports, __webpack_require__) {\n\neval(\"var Symbol = __webpack_require__(/*! ./_Symbol */ \\\"./node_modules/lodash/_Symbol.js\\\"),\\n    getRawTag = __webpack_require__(/*! ./_getRawTag */ \\\"./node_modules/lodash/_getRawTag.js\\\"),\\n    objectToString = __webpack_require__(/*! ./_objectToString */ \\\"./node_modules/lodash/_objectToString.js\\\");\\n\\n/** `Object#toString` result references. */\\nvar nullTag = '[object Null]',\\n    undefinedTag = '[object Undefined]';\\n\\n/** Built-in value references. */\\nvar symToStringTag = Symbol ? Symbol.toStringTag : undefined;\\n\\n/**\\n * The base implementation of `getTag` without fallbacks for buggy environments.\\n *\\n * @private\\n * @param {*} value The value to query.\\n * @returns {string} Returns the `toStringTag`.\\n */\\nfunction baseGetTag(value) {\\n  if (value == null) {\\n    return value === undefined ? undefinedTag : nullTag;\\n  }\\n  return (symToStringTag && symToStringTag in Object(value))\\n    ? getRawTag(value)\\n    : objectToString(value);\\n}\\n\\nmodule.exports = baseGetTag;\\n\\n\\n//# sourceURL=webpack://%5Bname%5DLink/./node_modules/lodash/_baseGetTag.js?\");\n\n/***/ }),\n\n/***/ \"./node_modules/lodash/_freeGlobal.js\":\n/*!********************************************!*\\\n  !*** ./node_modules/lodash/_freeGlobal.js ***!\n  \\********************************************/\n/*! no static exports found */\n/***/ (function(module, exports, __webpack_require__) {\n\neval(\"/* WEBPACK VAR INJECTION */(function(global) {/** Detect free variable `global` from Node.js. */\\nvar freeGlobal = typeof global == 'object' && global && global.Object === Object && global;\\n\\nmodule.exports = freeGlobal;\\n\\n/* WEBPACK VAR INJECTION */}.call(this, __webpack_require__(/*! ./../webpack/buildin/global.js */ \\\"./node_modules/webpack/buildin/global.js\\\")))\\n\\n//# sourceURL=webpack://%5Bname%5DLink/./node_modules/lodash/_freeGlobal.js?\");\n\n/***/ }),\n\n/***/ \"./node_modules/lodash/_getRawTag.js\":\n/*!*******************************************!*\\\n  !*** ./node_modules/lodash/_getRawTag.js ***!\n  \\*******************************************/\n/*! no static exports found */\n/***/ (function(module, exports, __webpack_require__) {\n\neval(\"var Symbol = __webpack_require__(/*! ./_Symbol */ \\\"./node_modules/lodash/_Symbol.js\\\");\\n\\n/** Used for built-in method references. */\\nvar objectProto = Object.prototype;\\n\\n/** Used to check objects for own properties. */\\nvar hasOwnProperty = objectProto.hasOwnProperty;\\n\\n/**\\n * Used to resolve the\\n * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)\\n * of values.\\n */\\nvar nativeObjectToString = objectProto.toString;\\n\\n/** Built-in value references. */\\nvar symToStringTag = Symbol ? Symbol.toStringTag : undefined;\\n\\n/**\\n * A specialized version of `baseGetTag` which ignores `Symbol.toStringTag` values.\\n *\\n * @private\\n * @param {*} value The value to query.\\n * @returns {string} Returns the raw `toStringTag`.\\n */\\nfunction getRawTag(value) {\\n  var isOwn = hasOwnProperty.call(value, symToStringTag),\\n      tag = value[symToStringTag];\\n\\n  try {\\n    value[symToStringTag] = undefined;\\n    var unmasked = true;\\n  } catch (e) {}\\n\\n  var result = nativeObjectToString.call(value);\\n  if (unmasked) {\\n    if (isOwn) {\\n      value[symToStringTag] = tag;\\n    } else {\\n      delete value[symToStringTag];\\n    }\\n  }\\n  return result;\\n}\\n\\nmodule.exports = getRawTag;\\n\\n\\n//# sourceURL=webpack://%5Bname%5DLink/./node_modules/lodash/_getRawTag.js?\");\n\n/***/ }),\n\n/***/ \"./node_modules/lodash/_objectToString.js\":\n/*!************************************************!*\\\n  !*** ./node_modules/lodash/_objectToString.js ***!\n  \\************************************************/\n/*! no static exports found */\n/***/ (function(module, exports) {\n\neval(\"/** Used for built-in method references. */\\nvar objectProto = Object.prototype;\\n\\n/**\\n * Used to resolve the\\n * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)\\n * of values.\\n */\\nvar nativeObjectToString = objectProto.toString;\\n\\n/**\\n * Converts `value` to a string using `Object.prototype.toString`.\\n *\\n * @private\\n * @param {*} value The value to convert.\\n * @returns {string} Returns the converted string.\\n */\\nfunction objectToString(value) {\\n  return nativeObjectToString.call(value);\\n}\\n\\nmodule.exports = objectToString;\\n\\n\\n//# sourceURL=webpack://%5Bname%5DLink/./node_modules/lodash/_objectToString.js?\");\n\n/***/ }),\n\n/***/ \"./node_modules/lodash/_root.js\":\n/*!**************************************!*\\\n  !*** ./node_modules/lodash/_root.js ***!\n  \\**************************************/\n/*! no static exports found */\n/***/ (function(module, exports, __webpack_require__) {\n\neval(\"var freeGlobal = __webpack_require__(/*! ./_freeGlobal */ \\\"./node_modules/lodash/_freeGlobal.js\\\");\\n\\n/** Detect free variable `self`. */\\nvar freeSelf = typeof self == 'object' && self && self.Object === Object && self;\\n\\n/** Used as a reference to the global object. */\\nvar root = freeGlobal || freeSelf || Function('return this')();\\n\\nmodule.exports = root;\\n\\n\\n//# sourceURL=webpack://%5Bname%5DLink/./node_modules/lodash/_root.js?\");\n\n/***/ }),\n\n/***/ \"./node_modules/lodash/debounce.js\":\n/*!*****************************************!*\\\n  !*** ./node_modules/lodash/debounce.js ***!\n  \\*****************************************/\n/*! no static exports found */\n/***/ (function(module, exports, __webpack_require__) {\n\neval(\"var isObject = __webpack_require__(/*! ./isObject */ \\\"./node_modules/lodash/isObject.js\\\"),\\n    now = __webpack_require__(/*! ./now */ \\\"./node_modules/lodash/now.js\\\"),\\n    toNumber = __webpack_require__(/*! ./toNumber */ \\\"./node_modules/lodash/toNumber.js\\\");\\n\\n/** Error message constants. */\\nvar FUNC_ERROR_TEXT = 'Expected a function';\\n\\n/* Built-in method references for those with the same name as other `lodash` methods. */\\nvar nativeMax = Math.max,\\n    nativeMin = Math.min;\\n\\n/**\\n * Creates a debounced function that delays invoking `func` until after `wait`\\n * milliseconds have elapsed since the last time the debounced function was\\n * invoked. The debounced function comes with a `cancel` method to cancel\\n * delayed `func` invocations and a `flush` method to immediately invoke them.\\n * Provide `options` to indicate whether `func` should be invoked on the\\n * leading and/or trailing edge of the `wait` timeout. The `func` is invoked\\n * with the last arguments provided to the debounced function. Subsequent\\n * calls to the debounced function return the result of the last `func`\\n * invocation.\\n *\\n * **Note:** If `leading` and `trailing` options are `true`, `func` is\\n * invoked on the trailing edge of the timeout only if the debounced function\\n * is invoked more than once during the `wait` timeout.\\n *\\n * If `wait` is `0` and `leading` is `false`, `func` invocation is deferred\\n * until to the next tick, similar to `setTimeout` with a timeout of `0`.\\n *\\n * See [David Corbacho's article](https://css-tricks.com/debouncing-throttling-explained-examples/)\\n * for details over the differences between `_.debounce` and `_.throttle`.\\n *\\n * @static\\n * @memberOf _\\n * @since 0.1.0\\n * @category Function\\n * @param {Function} func The function to debounce.\\n * @param {number} [wait=0] The number of milliseconds to delay.\\n * @param {Object} [options={}] The options object.\\n * @param {boolean} [options.leading=false]\\n *  Specify invoking on the leading edge of the timeout.\\n * @param {number} [options.maxWait]\\n *  The maximum time `func` is allowed to be delayed before it's invoked.\\n * @param {boolean} [options.trailing=true]\\n *  Specify invoking on the trailing edge of the timeout.\\n * @returns {Function} Returns the new debounced function.\\n * @example\\n *\\n * // Avoid costly calculations while the window size is in flux.\\n * jQuery(window).on('resize', _.debounce(calculateLayout, 150));\\n *\\n * // Invoke `sendMail` when clicked, debouncing subsequent calls.\\n * jQuery(element).on('click', _.debounce(sendMail, 300, {\\n *   'leading': true,\\n *   'trailing': false\\n * }));\\n *\\n * // Ensure `batchLog` is invoked once after 1 second of debounced calls.\\n * var debounced = _.debounce(batchLog, 250, { 'maxWait': 1000 });\\n * var source = new EventSource('/stream');\\n * jQuery(source).on('message', debounced);\\n *\\n * // Cancel the trailing debounced invocation.\\n * jQuery(window).on('popstate', debounced.cancel);\\n */\\nfunction debounce(func, wait, options) {\\n  var lastArgs,\\n      lastThis,\\n      maxWait,\\n      result,\\n      timerId,\\n      lastCallTime,\\n      lastInvokeTime = 0,\\n      leading = false,\\n      maxing = false,\\n      trailing = true;\\n\\n  if (typeof func != 'function') {\\n    throw new TypeError(FUNC_ERROR_TEXT);\\n  }\\n  wait = toNumber(wait) || 0;\\n  if (isObject(options)) {\\n    leading = !!options.leading;\\n    maxing = 'maxWait' in options;\\n    maxWait = maxing ? nativeMax(toNumber(options.maxWait) || 0, wait) : maxWait;\\n    trailing = 'trailing' in options ? !!options.trailing : trailing;\\n  }\\n\\n  function invokeFunc(time) {\\n    var args = lastArgs,\\n        thisArg = lastThis;\\n\\n    lastArgs = lastThis = undefined;\\n    lastInvokeTime = time;\\n    result = func.apply(thisArg, args);\\n    return result;\\n  }\\n\\n  function leadingEdge(time) {\\n    // Reset any `maxWait` timer.\\n    lastInvokeTime = time;\\n    // Start the timer for the trailing edge.\\n    timerId = setTimeout(timerExpired, wait);\\n    // Invoke the leading edge.\\n    return leading ? invokeFunc(time) : result;\\n  }\\n\\n  function remainingWait(time) {\\n    var timeSinceLastCall = time - lastCallTime,\\n        timeSinceLastInvoke = time - lastInvokeTime,\\n        timeWaiting = wait - timeSinceLastCall;\\n\\n    return maxing\\n      ? nativeMin(timeWaiting, maxWait - timeSinceLastInvoke)\\n      : timeWaiting;\\n  }\\n\\n  function shouldInvoke(time) {\\n    var timeSinceLastCall = time - lastCallTime,\\n        timeSinceLastInvoke = time - lastInvokeTime;\\n\\n    // Either this is the first call, activity has stopped and we're at the\\n    // trailing edge, the system time has gone backwards and we're treating\\n    // it as the trailing edge, or we've hit the `maxWait` limit.\\n    return (lastCallTime === undefined || (timeSinceLastCall >= wait) ||\\n      (timeSinceLastCall < 0) || (maxing && timeSinceLastInvoke >= maxWait));\\n  }\\n\\n  function timerExpired() {\\n    var time = now();\\n    if (shouldInvoke(time)) {\\n      return trailingEdge(time);\\n    }\\n    // Restart the timer.\\n    timerId = setTimeout(timerExpired, remainingWait(time));\\n  }\\n\\n  function trailingEdge(time) {\\n    timerId = undefined;\\n\\n    // Only invoke if we have `lastArgs` which means `func` has been\\n    // debounced at least once.\\n    if (trailing && lastArgs) {\\n      return invokeFunc(time);\\n    }\\n    lastArgs = lastThis = undefined;\\n    return result;\\n  }\\n\\n  function cancel() {\\n    if (timerId !== undefined) {\\n      clearTimeout(timerId);\\n    }\\n    lastInvokeTime = 0;\\n    lastArgs = lastCallTime = lastThis = timerId = undefined;\\n  }\\n\\n  function flush() {\\n    return timerId === undefined ? result : trailingEdge(now());\\n  }\\n\\n  function debounced() {\\n    var time = now(),\\n        isInvoking = shouldInvoke(time);\\n\\n    lastArgs = arguments;\\n    lastThis = this;\\n    lastCallTime = time;\\n\\n    if (isInvoking) {\\n      if (timerId === undefined) {\\n        return leadingEdge(lastCallTime);\\n      }\\n      if (maxing) {\\n        // Handle invocations in a tight loop.\\n        clearTimeout(timerId);\\n        timerId = setTimeout(timerExpired, wait);\\n        return invokeFunc(lastCallTime);\\n      }\\n    }\\n    if (timerId === undefined) {\\n      timerId = setTimeout(timerExpired, wait);\\n    }\\n    return result;\\n  }\\n  debounced.cancel = cancel;\\n  debounced.flush = flush;\\n  return debounced;\\n}\\n\\nmodule.exports = debounce;\\n\\n\\n//# sourceURL=webpack://%5Bname%5DLink/./node_modules/lodash/debounce.js?\");\n\n/***/ }),\n\n/***/ \"./node_modules/lodash/isObject.js\":\n/*!*****************************************!*\\\n  !*** ./node_modules/lodash/isObject.js ***!\n  \\*****************************************/\n/*! no static exports found */\n/***/ (function(module, exports) {\n\neval(\"/**\\n * Checks if `value` is the\\n * [language type](http://www.ecma-international.org/ecma-262/7.0/#sec-ecmascript-language-types)\\n * of `Object`. (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)\\n *\\n * @static\\n * @memberOf _\\n * @since 0.1.0\\n * @category Lang\\n * @param {*} value The value to check.\\n * @returns {boolean} Returns `true` if `value` is an object, else `false`.\\n * @example\\n *\\n * _.isObject({});\\n * // => true\\n *\\n * _.isObject([1, 2, 3]);\\n * // => true\\n *\\n * _.isObject(_.noop);\\n * // => true\\n *\\n * _.isObject(null);\\n * // => false\\n */\\nfunction isObject(value) {\\n  var type = typeof value;\\n  return value != null && (type == 'object' || type == 'function');\\n}\\n\\nmodule.exports = isObject;\\n\\n\\n//# sourceURL=webpack://%5Bname%5DLink/./node_modules/lodash/isObject.js?\");\n\n/***/ }),\n\n/***/ \"./node_modules/lodash/isObjectLike.js\":\n/*!*********************************************!*\\\n  !*** ./node_modules/lodash/isObjectLike.js ***!\n  \\*********************************************/\n/*! no static exports found */\n/***/ (function(module, exports) {\n\neval(\"/**\\n * Checks if `value` is object-like. 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styles if not already at top of page\\n    if (this._scrollPos > 0) {\\n      document.body.style.height = \\\"calc(100% + \\\" + this._scrollPos + \\\"px)\\\";\\n      document.body.style.top = -this._scrollPos + \\\"px\\\";\\n    }\\n  },\\n\\n  /**\\n   * Enable scrolling\\n   */\\n  unfreeze: function unfreeze() {\\n    // Remove js-no-scroll class\\n    document.documentElement.classList.remove(\\\"js-no-scroll\\\");\\n\\n    if (this._scrollPos > 0) {\\n      // Remove inline styles on body, which causes the page to jump to the top.\\n      document.body.style.height = \\\"\\\";\\n      document.body.style.top = \\\"\\\";\\n\\n      // Disable native smooth scrolling before resetting the scroll position.\\n      // Otherwise, there would be an annoying jump after scrolling is enabled.\\n      if (document.documentElement.style.hasOwnProperty('scrollBehavior')) {\\n        document.documentElement.style.scrollBehavior = \\\"auto\\\";\\n      }\\n\\n      // Reset scroll position 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{\n/******/ \t\t\ti: moduleId,\n/******/ \t\t\tl: false,\n/******/ \t\t\texports: {}\n/******/ \t\t};\n/******/\n/******/ \t\t// Execute the module function\n/******/ \t\tmodules[moduleId].call(module.exports, module, module.exports, __webpack_require__);\n/******/\n/******/ \t\t// Flag the module as loaded\n/******/ \t\tmodule.l = true;\n/******/\n/******/ \t\t// Return the exports of the module\n/******/ \t\treturn module.exports;\n/******/ \t}\n/******/\n/******/\n/******/ \t// expose the modules object (__webpack_modules__)\n/******/ \t__webpack_require__.m = modules;\n/******/\n/******/ \t// expose the module cache\n/******/ \t__webpack_require__.c = installedModules;\n/******/\n/******/ \t// define getter function for harmony exports\n/******/ \t__webpack_require__.d = function(exports, name, getter) {\n/******/ \t\tif(!__webpack_require__.o(exports, name)) {\n/******/ \t\t\tObject.defineProperty(exports, name, {\n/******/ \t\t\t\tconfigurable: false,\n/******/ \t\t\t\tenumerable: true,\n/******/ \t\t\t\tget: getter\n/******/ \t\t\t});\n/******/ \t\t}\n/******/ \t};\n/******/\n/******/ \t// define __esModule on exports\n/******/ \t__webpack_require__.r = function(exports) {\n/******/ \t\tObject.defineProperty(exports, '__esModule', { value: true });\n/******/ \t};\n/******/\n/******/ \t// getDefaultExport function for compatibility with non-harmony modules\n/******/ \t__webpack_require__.n = function(module) {\n/******/ \t\tvar getter = module && module.__esModule ?\n/******/ \t\t\tfunction getDefault() { return module['default']; } :\n/******/ \t\t\tfunction getModuleExports() { return module; };\n/******/ \t\t__webpack_require__.d(getter, 'a', getter);\n/******/ \t\treturn getter;\n/******/ \t};\n/******/\n/******/ \t// Object.prototype.hasOwnProperty.call\n/******/ \t__webpack_require__.o = function(object, property) { return Object.prototype.hasOwnProperty.call(object, property); };\n/******/\n/******/ \t// __webpack_public_path__\n/******/ \t__webpack_require__.p = \"\";\n/******/\n/******/\n/******/ \t// Load entry module and return exports\n/******/ \treturn __webpack_require__(__webpack_require__.s = \"./src/index.js\");\n/******/ })\n/************************************************************************/\n/******/ ({\n\n/***/ \"./src/index.js\":\n/*!**********************!*\\\n  !*** ./src/index.js ***!\n  \\**********************/\n/*! no static exports found */\n/***/ (function(module, exports, __webpack_require__) {\n\n\"use strict\";\neval(\"\\n\\nObject.defineProperty(exports, \\\"__esModule\\\", {\\n  value: true\\n});\\n\\nvar _createClass = function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if (\\\"value\\\" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; }();\\n\\nvar _utils = __webpack_require__(/*! ./utils */ \\\"./src/utils.js\\\");\\n\\nfunction _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError(\\\"Cannot call a class as a function\\\"); } }\\n\\n/**\\n * Wrap the last X words in an HTML tag to prevent them from wrapping (i.e. orphans)\\n * @param {HTMLElement} el - Target DOM node\\n * @param {Object} opts - Options\\n * @param {number} [opts.wordCount=2] - Minimum number of words required to wrap to a new line\\n * @param {string} [opts.wrapEl=span] - Tag name to use for the wrapper element\\n * @param {boolean} [opts.inlineStyles=true] - Add “white-space: nowrap;” to elements as inline style\\n * @param {string} [opts.className=u-nowrap] - Class name to apply to wrapper element\\n * @param {string} [opts.append] - Any arbitrary string or HTML to append inside of the wrapper element\\n */\\nvar Unorphanize = function () {\\n  function Unorphanize(el, opts) {\\n    _classCallCheck(this, Unorphanize);\\n\\n    this.el = el;\\n\\n    try {\\n      // Note: Using textContent instead of innerText avoids a reflow but includes text hidden by CSS.\\n      // https://developer.mozilla.org/en-US/docs/Web/API/Node/textContent#Differences_from_innerText\\n      this.origText = this.el.textContent;\\n      this.childNodes = this.el.children;\\n    } catch (e) {\\n      throw Error('Unorphanize: Constructor requires a DOM node object');\\n    }\\n\\n    // Exit if el is undefined or has no content\\n    if (el.innerHTML.trim().length === 0) {\\n      console.warn('Unorphanize: Element contains no text or child nodes');\\n    }\\n\\n    // Use Object.assign() to merge “options” object with default values object\\n    this.options = Object.assign({}, {\\n      wordCount: 2, // accepts any integer\\n      wrapEl: \\\"span\\\", // accepts any tag name\\n      inlineStyles: true, // will add “white-space: nowrap;” to wrapper el\\n      className: \\\"\\\", // accepts any valid class name\\n      append: \\\"\\\" // accepts any arbitrary HTML\\n    }, opts);\\n\\n    // Convert to integer\\n    this.options.wordCount = parseInt(this.options.wordCount, 10);\\n\\n    // Default to 2 if non-integer value was passed\\n    if (isNaN(this.options.wordCount)) {\\n      this.options.wordCount = 2;\\n    }\\n\\n    // Subtract 1 of an “append” string was passed\\n    if (this.options.append.length) {\\n      this.options.wordCount -= 1;\\n    }\\n\\n    // If no children, use simple method that doesn’t account for child nodes\\n    if (this.childNodes.length === 0) {\\n      // Update target element with new HTML\\n      this.el.innerHTML = (0, _utils.wrapPlainTextWords)(this.origText, this.options);\\n      // console.log(\\\"No children \\\\n\\\", this.el.outerHTML.replace(/\\\\r?\\\\n|\\\\r/g,\\\" \\\"));\\n    } else {\\n      // If there are child nodes, we must use more advanced logic\\n      this.wrapRichText();\\n    }\\n  }\\n\\n  /**\\n   * Parse child node text and adjacent strings, update variables\\n   * @param {HTMLElement} childEl - Child node\\n   */\\n\\n\\n  _createClass(Unorphanize, [{\\n    key: \\\"updateChildNodeVars\\\",\\n    value: function updateChildNodeVars() {\\n      this.childHtml = this.childEl.outerHTML;\\n\\n      // Use split to find text before and after the child\\n      this.currentChildSplit = this.el.innerHTML.split(this.childHtml);\\n      this.textBeforeChild = this.currentChildSplit[0];\\n      this.textAfterChild = this.currentChildSplit[1] || \\\"\\\";\\n\\n      // For every child after the first, we don’t want to re-count the words\\n      // from the previous child and any text to the right of it. We determine\\n      // where this is by searching for the first “<” character.\\n      this.markupIndex = this.textAfterChild.indexOf(\\\"<\\\");\\n\\n      // Get just the text after the child, but before any previously evaluated children.\\n      this.plainText = this.markupIndex > -1 ? this.textAfterChild.substring(0, this.markupIndex) : this.textAfterChild;\\n\\n      // Save the previously evaluated markup to add back later\\n      this.previousString = this.markupIndex > -1 ? this.textAfterChild.substring(this.markupIndex) : \\\"\\\";\\n\\n      // Save the child node text\\n      this.childText = this.childEl.textContent.trim();\\n\\n      // Count words in child node (if no text, count as 1 word, e.g. svg or img tag)\\n      this.childWordCount = this.childText.length ? this.childText.trim().split(\\\" \\\").length : 1;\\n\\n      // Convert plain text to array, fallback to null if no text\\n      // Note: A string of whitespce returns 1 for this.plainText.trim().split(\\\" \\\"),\\n      //       so check the trimmed length and set to null if it’s all whitespce.\\n      this.plainTextWords = this.plainText.trim().length ? this.plainText.trim().split(\\\" \\\") : null;\\n\\n      // Count words after child, not including previously evaluated text\\n      this.plainTextWordCount = this.plainTextWords !== null ? this.plainTextWords.length : 0;\\n\\n      // If the plain text doesn’t start with a space, treat the first words as part of the child element’s last word.\\n      this.partialWord = \\\"\\\";\\n\\n      if (this.plainTextWordCount > 0 && this.plainText.search(/\\\\S/) === 0) {\\n        // Save partial word string, remove from plainTextWords array\\n        this.partialWord = this.plainTextWords.shift();\\n        // Subtract 1 from plain text word count\\n        this.plainTextWordCount--;\\n      }\\n    }\\n\\n    // Format text before the first child\\n\\n  }, {\\n    key: \\\"formatTextBeforeFirstChild\\\",\\n    value: function formatTextBeforeFirstChild() {\\n      // After all the children have been evaluated, check for text before the first child.\\n      var elInnerHTML = this.el.innerHTML;\\n      var firstChildIndex = elInnerHTML.indexOf(\\\"<\\\");\\n      this.textBeforeChild = firstChildIndex > -1 ? elInnerHTML.substring(0, firstChildIndex) : elInnerHTML;\\n\\n      // Save the previously evaluated string to add back later\\n      var stringAfterText = firstChildIndex > -1 ? elInnerHTML.substring(firstChildIndex) : \\\"\\\";\\n\\n      if (this.textBeforeChild.trim().length > 0) {\\n        var words = this.textBeforeChild.trim().split(\\\" \\\");\\n\\n        if (words.length + this.previousWordCount === this.options.wordCount) {\\n          // Prevent entire element from wrapping\\n\\n          if (this.options.inlineStyles) {\\n            this.el.setAttribute(\\\"style\\\", _utils.nowrapCSS);\\n          }\\n\\n          if (this.options.className.length) {\\n            this.el.classList.add(this.options.className);\\n          }\\n\\n          // console.log(\\\"Text and children exactly equal word count \\\\n\\\", this.el.outerHTML.replace(/\\\\r?\\\\n|\\\\r/g,\\\" \\\"));\\n          return true;\\n        } else if (words.length + this.previousWordCount >= this.options.wordCount) {\\n          // Get number of additional words needed\\n          var wordsNeeded = this.options.wordCount - this.previousWordCount;\\n\\n          // Split string into two parts\\n          var leftoverText = (0, _utils.getLeadingSpace)(this.textBeforeChild) + words.splice(0, words.length - wordsNeeded).join(\\\" \\\");\\n          var textToWrap = words.join(\\\" \\\") + (0, _utils.getTrailingSpace)(this.textBeforeChild);\\n\\n          // Update target element HTML\\n          this.el.innerHTML = leftoverText + (0, _utils.wrapString)(textToWrap + stringAfterText, this.options);\\n          // console.log(\\\"Text and string have more than enough words \\\\n\\\", this.el.outerHTML.replace(/\\\\r?\\\\n|\\\\r/g,\\\" \\\"));\\n          return true;\\n        }\\n      }\\n    }\\n\\n    // In order to avoid using complex RegEx to parse HTML (see links below),\\n    // we’re looping through each child element. The steps are as follows:\\n    //\\n    // - Check for any text to the right of the current child element.\\n    // - If there is text, see how many words there are.\\n    // - Check if the first word has a leading space. If not, consider it part\\n    //   of the previous child element and don’t include in word count.\\n    // - If there are at least this.options.wordCount words, use wrapPlainTextWords() on the text.\\n    // - If there are not enough words, check the child element’s text.\\n    // - If the child has no space after it, consider its last word as part\\n    //   of the first plain text word to the right, so subtract 1 from word count.\\n    // - If the child has exactly enough words, wrap the child and the text\\n    //   to the right using wrapString().\\n    // - If the child has too many words, we can’t safely break it up to wrap just the\\n    //   desired number of words. Exit and do nothing.\\n    // - If the child doesn’t have enough words, move on to the next child.\\n    // - If all children have been checked and we still don’t have enough words,\\n    //   check for any text to the left of the first child.\\n    // - If the left text has exactly enough words, add a class of this.options.className (i.e. “u-nowrap”)\\n    // - If the left text has too many words, figure out how many we need and wrap along\\n    //   with the text to the right using wrapString().\\n    // - If the left text doens’t have enough words, exit and do nothing.\\n    //\\n    // Why we’re not using RegEx:\\n    // https://blog.codinghorror.com/parsing-html-the-cthulhu-way/\\n    // https://stackoverflow.com/a/1732454/673457\\n\\n  }, {\\n    key: \\\"wrapRichText\\\",\\n    value: function wrapRichText() {\\n      // Keep track of the number of “words” (includes tags with no text, like SVG)\\n      // so we can tell if it’s safe to wrap plain text and child elements together.\\n      // For example: `foo <b>bar.</b>` or `<b>foo</b> bar.`\\n      this.previousWordCount = 0;\\n\\n      for (var i = this.childNodes.length; i > 0; i--) {\\n        this.childEl = this.childNodes[i - 1];\\n\\n        // Update node text and adjacent string variables\\n        this.updateChildNodeVars();\\n\\n        // If no plain text, only check the child’s text\\n        //------------------------------------------------------------------------\\n        if (this.plainTextWordCount === 0) {\\n          if (this.childWordCount + this.previousWordCount >= this.options.wordCount) {\\n            if (this.previousWordCount === 0) {\\n              // If child has no text, wrap it (e.g. an svg/img that we’re appending content to)\\n              if (!this.childText.length) {\\n                this.childEl.outerHTML = (0, _utils.wrapString)(this.childEl.outerHTML, this.options);\\n              } else {\\n                // Child has enough words by itself, so we can wrap its inner text\\n                this.childEl.innerHTML = (0, _utils.wrapPlainTextWords)(this.childEl.textContent, this.options);\\n              }\\n              // console.log(\\\"Last child has enough words \\\\n\\\", this.el.outerHTML.replace(/\\\\r?\\\\n|\\\\r/g,\\\" \\\"));\\n              return true;\\n            } else if (this.childWordCount + this.previousWordCount === this.options.wordCount) {\\n              // If the child’s words plus the previous words are exactly enough, wrap both.\\n              this.el.innerHTML = this.textBeforeChild + (0, _utils.wrapString)(this.childHtml + this.textAfterChild, this.options);\\n              // console.log(\\\"Last child and previous text have exactly enough words \\\\n\\\", this.el.outerHTML.replace(/\\\\r?\\\\n|\\\\r/g,\\\" \\\"));\\n              return true;\\n            } else if (this.childWordCount + this.previousWordCount > this.options.wordCount) {\\n              console.warn(\\\"Unorphanize: Can’t safely prevent orphans on this element \\\\n\\\", this.el);\\n              return true;\\n            }\\n          } else {\\n            // Increment this.previousWordCount and continue with for loop\\n            // console.log(\\\"Child has too few words, increment this.previousWordCount by\\\", this.childWordCount);\\n            this.previousWordCount += this.childWordCount;\\n          }\\n        }\\n        // Text and previous string have exactly enough words\\n        //------------------------------------------------------------------------\\n        else if (this.plainTextWordCount + this.previousWordCount === this.options.wordCount) {\\n            // Update target element HTML\\n            this.el.innerHTML = this.textBeforeChild + this.childHtml + (0, _utils.wrapString)(this.plainText + this.previousString, this.options);\\n            // console.log(\\\"Text and previous string have exactly enough words \\\\n\\\", this.el.outerHTML.replace(/\\\\r?\\\\n|\\\\r/g,\\\" \\\"));\\n            return true;\\n          }\\n          // Text and previous string have more than enough words\\n          //------------------------------------------------------------------------\\n          else if (this.plainTextWordCount + this.previousWordCount > this.options.wordCount) {\\n              // Get number of additional words needed\\n              var wordsNeeded = this.options.wordCount - this.previousWordCount;\\n\\n              // Split string into two parts, add back leading/trailing space\\n              var leftoverText = (0, _utils.getLeadingSpace)(this.plainText) + this.plainTextWords.splice(0, this.plainTextWordCount - wordsNeeded).join(\\\" \\\");\\n              var textToWrap = this.plainTextWords.join(\\\" \\\") + (0, _utils.getTrailingSpace)(this.plainText);\\n\\n              // Update target element HTML\\n              this.el.innerHTML = this.textBeforeChild + this.childHtml + leftoverText + (0, _utils.wrapString)(textToWrap + this.previousString, this.options);\\n              // console.log(\\\"Text and string have more than enough words \\\\n\\\", this.el.outerHTML.replace(/\\\\r?\\\\n|\\\\r/g,\\\" \\\"));\\n              return true;\\n            }\\n            // Child words plus text and previous string have exactly enough words\\n            //------------------------------------------------------------------------\\n            else if (this.childWordCount + this.plainTextWordCount + this.previousWordCount === this.options.wordCount) {\\n                // Update target element HTML\\n                this.el.innerHTML = this.textBeforeChild + (0, _utils.wrapString)(this.childHtml + this.plainText + this.previousString, this.options);\\n                // console.log(\\\"Child words plus text plus previous text have exactly enough words \\\\n\\\", this.el.outerHTML.replace(/\\\\r?\\\\n|\\\\r/g,\\\" \\\"));\\n                return true;\\n              }\\n              // Child words plus text and previous string have more than enough words\\n              //------------------------------------------------------------------------\\n              else if (this.childWordCount + this.plainTextWordCount + this.previousWordCount > this.options.wordCount) {\\n                  console.warn(\\\"Unorphanize: Can’t safely prevent orphans on this element \\\\n\\\", this.el);\\n                  return true;\\n                } else {\\n                  // Increment this.previousWordCount and continue with for loop\\n                  this.previousWordCount += this.childWordCount + this.plainTextWordCount;\\n                  // console.log(\\\"Increment word count to \\\", this.previousWordCount);\\n                }\\n      }\\n\\n      // If we still don’t have enough words to wrap, check for any text before the first child\\n      this.formatTextBeforeFirstChild();\\n    }\\n  }]);\\n\\n  return Unorphanize;\\n}();\\n\\nexports.default = Unorphanize;\\n\\n//# sourceURL=webpack://%5Bname%5DLink/./src/index.js?\");\n\n/***/ }),\n\n/***/ \"./src/utils.js\":\n/*!**********************!*\\\n  !*** ./src/utils.js ***!\n  \\**********************/\n/*! no static exports found */\n/***/ (function(module, exports, __webpack_require__) {\n\n\"use strict\";\neval(\"\\n\\nObject.defineProperty(exports, \\\"__esModule\\\", {\\n  value: true\\n});\\nexports.getLeadingSpace = getLeadingSpace;\\nexports.getTrailingSpace = getTrailingSpace;\\nexports.wrapString = wrapString;\\nexports.wrapPlainTextWords = wrapPlainTextWords;\\n// Inlines styles to prevent wrapping\\nvar nowrapCSS = exports.nowrapCSS = \\\"white-space: nowrap !important;\\\";\\n\\n/**\\n * Get leading whitespace of string\\n * @param {string} string - Source string\\n * @return {string} Leading whitespace string\\n */\\nfunction getLeadingSpace(string) {\\n  // Return everything before first non-whitespace character\\n  return string.substring(0, string.search(/\\\\S/));\\n}\\n\\n/**\\n * Get trailing whitespace\\n * @param {string} string - Source string\\n * @return {string} Trailing whitespace string\\n */\\nfunction getTrailingSpace(string) {\\n  var trailingSpaceIndex = string.search(/\\\\s+$/);\\n  // RegEx finds 1 or more consecutive spaces at the end of the string\\n  return trailingSpaceIndex > -1 ? string.substring(string.search(/\\\\s+$/), string.length) : \\\"\\\";\\n}\\n\\n/**\\n * Wrap entire string in span and return HTML\\n * @param {string} string - Plain text string\\n * @return {string} Source string wrapped in HTML tag\\n */\\nfunction wrapString(string, options) {\\n  var classAttr = \\\" class=\\\\\\\"\\\" + options.className + \\\"\\\\\\\"\\\";\\n  var styleAttr = \\\" style=\\\\\\\"\\\" + nowrapCSS + \\\"\\\\\\\"\\\";\\n\\n  // This unusual syntax formatting avoids adding line breaks to returned string\\n  return \\\"\\\\n    <\\\" + options.wrapEl + (options.className.length ? classAttr : \\\"\\\") + (options.inlineStyles ? styleAttr : \\\"\\\") + \\\">\\\" + string + options.append + \\\"</\\\" + options.wrapEl + \\\">\\\";\\n}\\n\\n/**\\n * Wrap last X words of plain text string in HTML tag\\n * @param {string} text - Plain text string\\n * @return {string} String with last words wrapped in HTML tag\\n */\\nfunction wrapPlainTextWords(text, options) {\\n  // Create word array\\n  // (trim text to avoid counting leading/trailing spaces)\\n  var allWords = text.trim().split(\\\" \\\");\\n\\n  // Return original text if not enough words to wrap\\n  if (allWords.length < options.wordCount) {\\n    return text;\\n  }\\n\\n  // Find the last X words that should not wrap\\n  var lastWords = allWords.splice(allWords.length - options.wordCount, options.wordCount);\\n\\n  // Add back leading/trailing space\\n  var startString = getLeadingSpace(text) + allWords.join(\\\" \\\");\\n  var endString = lastWords.join(\\\" \\\") + getTrailingSpace(text);\\n\\n  var classAttr = \\\" class=\\\\\\\"\\\" + options.className + \\\"\\\\\\\"\\\";\\n  var styleAttr = \\\" style=\\\\\\\"\\\" + nowrapCSS + \\\"\\\\\\\"\\\";\\n\\n  // This unusual syntax formatting avoids adding line breaks to returned string\\n  return \\\"\\\\n    \\\" + (startString.length ? startString + \\\" \\\" : \\\" \\\") + \\\"<\\\" + options.wrapEl + (options.className.length ? classAttr : \\\"\\\") + (options.inlineStyles ? styleAttr : \\\"\\\") + \\\">\\\" + endString + options.append + \\\"</\\\" + options.wrapEl + \\\">\\\";\\n}\\n\\n//# sourceURL=webpack://%5Bname%5DLink/./src/utils.js?\");\n\n/***/ })\n\n/******/ });\n//# sourceMappingURL=unorphanize.commonjs2.js.map","//------------------------------------------------------------------------\n// Append icons to links and prevent them from wrapping\n//------------------------------------------------------------------------\n/* eslint-disable quotes */\nimport Unorphanize from '@threespot/unorphanize';\n\nexport default class Icon {\n  constructor(el, opts) {\n    const fileTypes = ['pdf', 'doc', 'docx', 'xls', 'xlsx', 'ppt', 'pptx'];\n    const icons = {\n      arrow: {\n        class: 'icon icon-arrow',\n        viewBox: '0 0 14 12',\n        width: 15,\n        // height: 13, // optionally set the default height\n        path: `<g fill=\"currentColor\"><path fill=\"var(--icon-color)\" d=\"M10 6.63H0V4.92h9.98L6.85 1.67 8.1.47l5.1 5.3-5.1 5.32-1.24-1.18L10 6.63z\"/></g>`\n        // customAttrs: '' // optional additional attrs (e.g. fill=\"none\" stroke=\"#fff\" stroke-width=\"1\")\n      },\n      download: {\n        class: 'icon icon-download',\n        height: 13,\n        viewBox: '0 0 16 21',\n        width: 11,\n        path: `<g fill=\"currentColor\"><path fill=\"var(--icon-color)\" d=\"M14.54 17.77V21H1.62v-3.23h12.92zM9.69 0v9.72l4.02-4L15.99 8l-8 8L0 8 2.28 5.7 6.46 9.9V0H9.7z\"/></g>`\n      },\n      external: {\n        class: 'icon icon-external',\n        viewBox: '0 0 13 12',\n        width: 15,\n        path: `<g fill=\"currentColor\"><path fill=\"var(--icon-color)\" d=\"M2.372792 0l.001 10h9.999v2h-12V0h2zm9.74264 0v7h-2l-.00064-3.657-4.327786 4.328573-1.414214-1.414214L8.628792 2h-3.51336V0h7z\"/></g>`\n      }\n    };\n\n    // Use Object.assign() to merge “opts” object with default values in this.options\n    this.options = Object.assign(\n      {},\n      {\n        name: el.getAttribute('data-icon'),// use “none” to only add external or download icons\n        shouldSwap: el.hasAttribute('data-icon-swap'),// switch to external or download icon when applicable\n        height: el.getAttribute('data-icon-height'),// optional height override\n        width: el.getAttribute('data-icon-width'),// optional width override\n      },\n      opts\n    );\n\n    // Check if icon exists\n    if (!(this.options.name in icons) && this.options.name != 'none') {\n      console.warn(`Icon “${this.options.name}” was not found in link-icons.js`, el);\n      return false;\n    }\n\n    // Automatically change the icon if it’s external or a download link\n    // NOTE: This is project-specific, edit as needed.\n    if (this.options.shouldSwap) {\n      // If link is external, use external icon (excluding certain CTA links/buttons below)\n      // External link test from https://gist.github.com/jlong/2428561\n      var a = document.createElement('a');\n      a.href = el.href;\n      if (a.hostname !== window.location.hostname) {\n        this.options.name = 'external';\n      }\n\n      // Check if link is a file download\n      let fileExt = a.pathname.split('.').pop();\n\n      if (fileTypes.indexOf(fileExt) > -1) {\n        this.options.name = 'download';\n      }\n    }\n\n    // Exit early if not adding an icon\n    if (this.options.name == 'none') {\n      return false;\n    }\n\n    // Create new object for this icon so we can change\n    // the dimensions without affecting the defaults.\n    const icon = {};\n\n    // Copy values from original icons object\n    Object.assign(icon, icons[this.options.name]);\n\n    // Validate height and width values if present\n    // Note: Use unary plus (+) operator to convert strings to numbers\n    // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Arithmetic_Operators#Unary_plus_()\n    if (this.options.height) {\n      if (isNaN(+this.options.height)) {\n        console.warn(\n          `Can’t parse data-icon-height value of “${this.options.height}” on ${el}`\n        );\n        return false;\n      } else {\n        icon.height = +this.options.height;\n      }\n    }\n\n    if (this.options.width) {\n      if (isNaN(+this.options.width)) {\n        console.warn(\n          `Can parse data-icon-width value of “${this.options.width}” on ${el}`\n        );\n        return false;\n      } else {\n        icon.width = +this.options.width;\n      }\n    }\n\n    // Make sure either the height or width has been defined\n    if (!icon.height && !icon.width) {\n      console.warn(`No height or width defined for icon “${this.options.name}”`, icon);\n      return false;\n    }\n\n    // Calculate height or width if only one dimension was provided\n    // Note: We can’t rely on CSS to resize SVGs in IE11-\n    //       because IE doesn’t respect the viewBox ratio.\n    let viewBoxArr = icon.viewBox.split(' ');\n\n    // Validate viewBox value\n    if (viewBoxArr.length !== 4) {\n      console.warn(\n        `Icon “${this.options.name}” has a malformed viewBox attribute: “${icon.viewBox}”`\n      );\n      return false;\n    }\n\n    // Calculate aspect ratio\n    let aspectRatio = +viewBoxArr[2] / +viewBoxArr[3];\n\n    // Calculate height if width was provided\n    if (!icon.height && icon.width) {\n      icon.height = this.roundSingleDecimal(icon.width / aspectRatio);\n    }\n\n    // Calculate width if height was provided\n    if (!icon.width && icon.height) {\n      icon.width = this.roundSingleDecimal(icon.height * aspectRatio);\n    }\n\n    // Insert the icon using Unorphanize to prevent wrapping\n    if (this.options.name != 'none') {\n      // TODO: Replace unorphnaize with simpler logic since this is only\n      //       used for links that contain plain text.\n      new Unorphanize(el, {\n        inlineStyles: false,\n        className: 'u-nowrap',\n        append: this.buildSVG(icon)\n      });\n    }\n  }\n\n  // Use simple rounding function since we only need one decimal place.\n  // This apprach has issues when rounding to more decimal places:\n  // e.g. Math.round(1.005 * 100) / 100; // 1 instead of 1.01\n  // http://www.jacklmoore.com/notes/rounding-in-javascript/\n  //\n  // Note: If more decimal places are desired, see this MDN page:\n  // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math/round#A_better_solution\n  //\n  // function round(number, precision) {\n  //   var shift = function (number, exponent) {\n  //     var numArray = ('' + number).split('e');\n  //     return +(numArray[0] + 'e' + (numArray[1] ? (+numArray[1] + precision) : precision));\n  //   };\n  //   return shift(Math.round(shift(number, +exponent)), -exponent);\n  // }\n  roundSingleDecimal(number) {\n    return Math.round(number * 10) / 10;\n  }\n\n  buildSVG(icon) {\n    // Note: Don’t add line breaks or other whitespace as that will affect the icon position in the browser\n    return `<svg class=\"${icon.class}\" viewBox=\"${icon.viewBox}\" width=\"${icon.width}\" height=\"${icon.height}\" preserveAspectRatio=\"xMidYMid meet\" aria-hidden=\"true\" focusable=\"false\" ${icon.customAttrs} xmlns:xlink=\"http://www.w3.org/1999/xlink\">${icon.path}</svg>`;\n  }\n}\n","//------------------------------------------------------------------------\n// Accordion\n//------------------------------------------------------------------------\nimport ExpandToggle from '@threespot/expand-toggle';\n\nif (document.querySelector('[data-accordion]')) {\n  const accordionDrawers = document.querySelectorAll('[data-accordion]');\n\n  accordionDrawers.forEach(accordionDrawer => {\n    console.log('accordion drawer');\n    new ExpandToggle(accordionDrawer);\n  });\n}","//------------------------------------------------------------------------\n// Art Collection grab scroll\n//-----------------------------------------------------------------------\n\nexport default class ArtCollectionScroll {\n  constructor() {\n    this.artCollections = document.querySelectorAll('.ArtCollection-rows');\n\n    for (var i = 0; i < this.artCollections.length; ++i) {\n        let collection = this.artCollections[i];\n        let isDown = false;\n        let startX;\n        let scrollLeft;\n\n        collection.addEventListener('mousedown', (e) => {\n          isDown = true;\n          collection.classList.add('active');\n          startX = e.pageX - collection.offsetLeft;\n          scrollLeft = collection.scrollLeft;\n        });\n        collection.addEventListener('mouseleave', () => {\n          isDown = false;\n          collection.classList.remove('active');\n        });\n        collection.addEventListener('mouseup', () => {\n          isDown = false;\n          collection.classList.remove('active');\n        });\n        collection.addEventListener('mousemove', (e) => {\n          if(!isDown) return;\n          e.preventDefault();\n          const x = e.pageX - collection.offsetLeft;\n          const walk = (x - startX);\n          collection.scrollLeft = scrollLeft - walk;\n        });\n    }\n  }\n}\n\n// Init\ndocument.querySelectorAll('.ArtCollection-rows').forEach((el) => {\n  new ArtCollectionScroll(el);\n});\n","//------------------------------------------------------------------------\n// Art Collection transition animations\n//-----------------------------------------------------------------------\n\nexport default class ArtCollection {\n  constructor() {\n    this.toggles = document.querySelectorAll('.ArtAndArtist-tab-toggle');\n\n    for (var i = 0; i < this.toggles.length; ++i) {\n      this.toggles[i].addEventListener('click', evt => {\n        var tabId = evt.target.getAttribute('aria-controls');\n        var tabPanel = document.getElementById(tabId);\n        var tabImages = tabPanel.querySelectorAll('.ArtCollection-image');\n\n        // Fade images in sequentially\n        var i = 1;\n        tabImages.forEach((el) => {\n          el.style.opacity = 0;\n          el.style.transition = 'opacity 400ms ease-in-out';\n          var imageEl = el;\n          setTimeout(() => {\n            imageEl.style.opacity = 1;\n          }, 80*i)\n          i++;\n        })\n      })\n    }\n  }\n}\n\n// Init\ndocument.querySelectorAll('.ArtAndArtist').forEach((el) => {\n  new ArtCollection(el);\n});\n","//------------------------------------------------------------------------\n// Populate Collections data from an image ID\n//-----------------------------------------------------------------------\n\nexport default class CollectionsData {\n  constructor(el) {\n    const imageId = el.dataset.imageId;\n    const url = `https://collections-search-5206855655.us-west-2.bonsaisearch.net/gokm/_search`;\n    const headers = new Headers();\n    const body = {\n        'query': {\n          'ids': {\n            'values':\n              `${imageId}`\n            }\n          }\n        }\n\n    headers.append('Content-Type', 'application/json');\n\n    // Basic Auth not needed on prod endpoint\n    // headers.set('Authorization', 'Basic ' + btoa(username + \":\" + password));\n\n    // Check to make sure browser supports IntersectionObserver\n    if (!('IntersectionObserver' in window) ||\n      !('IntersectionObserverEntry' in window) ||\n      !('intersectionRatio' in window.IntersectionObserverEntry.prototype)) {\n      fetchImageData();\n    } else {\n      // Setup scroll observer to check if element is visible\n      var observer = new IntersectionObserver(function(images) {\n        if(images[0].isIntersecting === true) {\n          fetchImageData();\n        }\n      }, { threshold: [0] });\n\n      observer.observe(el); // watch for elements that need to fetch data\n    }\n\n    // Fetch data from the Collections Online to populate the element\n    function fetchImageData() {\n      fetch(url, {method:'POST',\n        headers: headers,\n        body: JSON.stringify(body)\n        })\n      .then((res) => res.json())\n      .then(\n        (result) => {\n          const object = result.hits.hits[0]._source;\n          const imgEl = el.querySelector('.CollectionsData-img');\n          const titleEl = el.querySelector('.CollectionsData-title');\n          const artistEl = el.querySelector('.CollectionsData-artist');\n          const dateEl = el.querySelector('.CollectionsData-date');\n          const artistDateEl = el.querySelector('.CollectionsData-artistDate');\n\n          if (imgEl) {\n            imgEl.src = `https://iiif.okeeffemuseum.org/image/iiif/2/${object.representation.views[0].id.split(\"/\").pop()}/full/,600/0/default.jpg`;\n            imgEl.alt = `\"${object['note'][0]}`;\n          }\n\n          if (titleEl) {\n            titleEl.innerText = object['label'][0];\n          }\n\n          if (artistEl) {\n            artistEl.innerText = object['artist_label'];\n          }\n\n          if (dateEl) {\n            const beginYear = object.timespan.begin_of_the_begin;\n            const endYear = object.timespan.end_of_the_end;\n            if (beginYear == endYear) {\n              dateEl.innerText = beginYear;\n            } else {\n              dateEl.innerText = `${beginYear}-${endYear}`;\n            }\n          }\n\n          if (artistDateEl) {\n            const beginYear = object.timespan.begin_of_the_begin;\n            const endYear = object.timespan.end_of_the_end;\n            if (beginYear == endYear) {\n              artistDateEl.innerText = `${object['artist_label']}, ${beginYear}`;\n            } else {\n              artistDateEl.innerText = `${object['artist_label']}, ${beginYear}-${endYear}`;\n            }\n          }\n        },\n        (error) => {\n          console.log(error);\n        }\n      );\n    }\n  }\n}\n\n// Init\ndocument.querySelectorAll('.CollectionsData').forEach((el) => {\n  new CollectionsData(el);\n});\n","/**\n * Custom hook for debouncing a value contained in state.\n * https://usehooks.com/useDebounce/\n */\nimport { useState, useEffect } from \"react\";\n\nconst useDebounce = (value, delay) => {\n  // State and setters for debounced value\n  const [debouncedValue, setDebouncedValue] = useState(value);\n  useEffect(\n    () => {\n      // Update debounced value after delay\n      const handler = setTimeout(() => {\n        setDebouncedValue(value);\n      }, delay);\n      // Cancel the timeout if value changes (also on delay change or unmount)\n      // This is how we prevent debounced value from updating if value is changed ...\n      // .. within the delay period. Timeout gets cleared and restarted.\n      return () => {\n        clearTimeout(handler);\n      };\n    },\n    [value, delay] // Only re-call effect if value or delay changes\n  );\n  return debouncedValue;\n};\n\nexport default useDebounce;\n","/**\n* Hook to check if an element is visible\n* - used for lazy loading\n*/\n\nimport { useState, useEffect } from \"react\";\n\nexport default function useOnScreen(ref) {\n\n  const [isIntersecting, setIntersecting] = useState(false);\n\n  // Check to make sure browser supports IntersectionObserver\n  if (!('IntersectionObserver' in window) ||\n    !('IntersectionObserverEntry' in window) ||\n    !('intersectionRatio' in window.IntersectionObserverEntry.prototype)) {\n\n    setIntersecting(true);\n  } else {\n    const observer = new IntersectionObserver(\n      ([entry]) => setIntersecting(entry.isIntersecting)\n    )\n\n    useEffect(() => {\n      observer.observe(ref.current)\n\n      // Remove the observer as soon as the component is unmounted\n      return () => { observer.disconnect() }\n    }, [])\n  }\n\n  return isIntersecting\n}","import React from \"react\";\nimport ReactDOM from \"react-dom\";\nimport Lightbox from \"./components/imageViewer/Lightbox\";\n\ndocument.querySelectorAll('.Lightbox').forEach((el) => {\n  const props = el.dataset;\n\n  // conditional added to handle eslint error: ReactDOM.render is deprecated since React 18.0.0, use createRoot instead\n  if (ReactDOM.createRoot) {\n    const root = ReactDOM.createRoot(el);\n    root.render(<Lightbox {...props} />);\n  } else {\n    ReactDOM.render(<Lightbox {...props} />, el);\n  }\n});\n","//------------------------------------------------------------------------\n// Append icons to links and prevent them from wrapping\n//------------------------------------------------------------------------\nimport Icon from '../lib/link-icons';\n\n// Optional: Add “data-icon” attribute support\n// document.querySelectorAll('[data-icon]').forEach((el) => {\n//   new Icon(el);\n// });\n\n// Add external icons to richtext links\n// Note: Buttons are handled separately\ndocument.querySelectorAll('.u-richtext > *:not([id^=\"block\"]) a:not(.wp-block-button__link)')\n  .forEach((el) => {\n    new Icon(el, {\n      name: 'none',// no default icon, only apply external and download icons\n      shouldSwap: true,\n    });\n  });\n","//------------------------------------------------------------------------\n// Main Navigation\n//\n// Uses hover to open submenus for mouse users,\n// and uses button toggles for keyboard users.\n// ------------------------------------------------------------------------\n\nexport default class mainNavSubmenus {\n  constructor() {\n    this.navItems = document.querySelectorAll('.Nav-primary-item');\n    this.parentNavToggles = document.querySelectorAll('.Nav-toggle.level-0');\n    this.shopItem = document.querySelectorAll('.Nav-shop');\n    this.shopToggle = document.querySelectorAll('.Nav-shop-toggle');\n\n    // Hover state for all top level nav items\n    // And open submenus on hover for mouse users\n    if (window.innerWidth > 1200) {\n      this.navItems.forEach(el => {\n        el.addEventListener('mouseover', function(){\n          el.classList.add('active');\n          if (el.classList.contains('has-submenu')) {\n            el.classList.add('open');\n          }\n        });\n        el.addEventListener('mouseout', function() {\n          const activeItem = document.querySelector('.Nav-primary-item.active');\n          if (activeItem) {\n            activeItem.classList.remove('active');\n          }\n          if (el.classList.contains('has-submenu')) {\n            el.classList.remove('open');\n          }\n        });\n      });\n    }\n\n    // Listen for breakpoint change, update behavior\n    window.addEventListener('resize', () => {\n      if (window.innerWidth > 1200) {\n        this.navItems.forEach(el => {\n          el.addEventListener('mouseover', function(){\n            el.classList.add('active');\n            if (el.classList.contains('has-submenu')) {\n              el.classList.add('open');\n            }\n          });\n          el.addEventListener('mouseout', function() {\n            const activeItem = document.querySelector('.Nav-primary-item.active');\n            if (activeItem) {\n              activeItem.classList.remove('active');\n            }\n            if (el.classList.contains('has-submenu')) {\n              el.classList.remove('open');\n            }\n          });\n        });\n      }\n    });\n    // Open submenus with toggle for keyboard users\n    this.parentNavToggles.forEach(el => {\n      const parent = el.closest('.Nav-primary-item.has-submenu');\n      el.addEventListener('click', function(event){\n        if (parent.classList.contains('open')) {\n          parent.classList.remove('open', 'active');\n          event.target.ariaPressed = \"false\";\n        } else {\n          // Close other open dropdown before opening a new one\n          if (document.querySelectorAll('.Nav-primary-item.has-submenu.active').length > 0){\n            document.querySelectorAll('.Nav-primary-item.has-submenu.active')[0].ariaPressed = \"false\";\n            document.querySelectorAll('.Nav-primary-item.has-submenu.active')[0].classList.remove('open', 'active');\n          }\n          parent.classList.add('open', 'active');\n          event.target.ariaPressed = \"true\";\n        }\n      });\n    });\n\n    // Open Shop submenu on hover for mouse users\n    this.shopItem.forEach(el => {\n      el.addEventListener('mouseover', function(){\n        this.classList.add('open');\n      });\n      el.addEventListener('mouseout', function(){\n        this.classList.remove('open');\n      });\n    });\n\n    // Open Shop submenus with toggle for keyboard users\n    this.shopToggle.forEach(el => {\n      const parent = el.closest('.Nav-shop');\n      el.addEventListener('keyup', function(event){\n        if (event.keyCode === 13) {\n          if (parent.classList.contains('open')) {\n            parent.classList.remove('open');\n            event.target.ariaPressed = \"false\";\n          } else {\n            parent.classList.add('open');\n            event.target.ariaPressed = \"true\";\n          }\n        }\n      });\n    });\n  }\n}\n\n// Init\nnew mainNavSubmenus();\n","//------------------------------------------------------------------------\n// Membership discount form on Shop cart\n//-----------------------------------------------------------------------\n\nexport default class MembershipDiscountForm {\n  constructor() {\n    if (typeof woocommerce_params === 'undefined') {\n        return false;\n    }\n\n    this.submitButton = document.querySelector(\"#membership_email-wrapper button\");\n\n    if (!this.submitButton) {\n      return false;\n    }\n\n    this.submitButton.addEventListener('click', function() {\n      this.emailInput = document.querySelector(\"#membership_email-wrapper input\")\n      const value = this.emailInput.value;\n\n      // FIXME - integrate with ALTRU to check if email address is associated with an active membership\n      $.ajax({\n        type: 'POST',\n        url: 'fixmeAltuEndpoint',\n        data: {\n          'action': 'membership_email',\n          'membership_email': value,\n        },\n        success: function(response) {// eslint-disable-line no-unused-vars\n          // console.log(response);\n\n          if (value == \"email\") {\n            $(document.body).trigger(\"added_to_cart\"); // refresh cart\n          } else {\n            console.warn(\"email not valid\");\n          }\n        },\n        error: function(error) {\n          console.warn(\"something went wrong\", error);\n        }\n      });\n    });\n  }\n}\n\n// Init\ndocument.querySelectorAll('.woocommerce-cart-form').forEach((el) => {\n  new MembershipDiscountForm(el);\n});\n","//------------------------------------------------------------------------\n// Subnav expandable menus\n//------------------------------------------------------------------------\nimport ExpandToggle from '@threespot/expand-toggle';\n\nexport default class expandableToggles {\n  constructor() {\n    this.toggles = document.querySelectorAll('[data-expands]:not([data-accordion])');\n    this.expandables = [];// placeholder\n    this.allowMultipleOpen = true;\n\n    // Main nav breakpoint\n    this.mediaQueryList = window.matchMedia('(min-width: 1200px)');\n\n    // Init toggles\n    this.toggles.forEach(el => {\n      let toggle = new ExpandToggle(el);\n      this.expandables.push(toggle);\n\n      // Collapse toggle when switching between mobile and desktop nav layout\n      document.documentElement.addEventListener('nav-reset', function () {\n        toggle.collapse();\n      });\n\n      // Update height when web fonts have loaded\n      document.documentElement.addEventListener('fonts-loaded', function () {\n        toggle.updateExpandedHeight();\n      });\n    });\n\n    // Close toggles if click outside of them\n    window.addEventListener('click', evt => {\n      if (!this.allowMultipleOpen &&\n        !evt.target.closest('.Nav-toggle')) {\n        this.closeMenus();\n      }\n    });\n\n    // Logic to check if only one menu should be open at a time\n    this.expandables.forEach((currToggle, currindex) => {\n      // Add “expand” event listener to toggles\n      // (has to be done after “this.expandables” array has been populated)\n      currToggle.on('expand', () => {\n        if (!this.allowMultipleOpen) {\n          // Close other menus\n          this.expandables.forEach((toggle, index) => {\n            if (index !== currindex) {\n              toggle.collapse();\n            }\n          });\n        }\n      });\n    });\n  }\n\n  closeMenus() {\n    this.expandables.forEach(toggle => {\n      toggle.collapse();\n    });\n  }\n}\n\n// Init\nnew expandableToggles();","//------------------------------------------------------------------------\n// Art Collection transition animations\n//-----------------------------------------------------------------------\n\nexport default class ScrollToAnimate {\n  constructor(el) {\n\n    // Check to make sure browser supports IntersectionObserver\n    if (!('IntersectionObserver' in window) ||\n      !('IntersectionObserverEntry' in window) ||\n      !('intersectionRatio' in window.IntersectionObserverEntry.prototype)) {\n        el.classList.add('in-viewport');\n    } else {\n      // Setup scroll observer to check if element is visible\n      var observer = new IntersectionObserver(function(entries) {\n        if(entries[0].isIntersecting === true) {\n          el.classList.add('in-viewport');\n        }\n      }, { threshold: [0] });\n\n      observer.observe(el);\n    }\n  }\n}\n\n// Init\ndocument.querySelectorAll('.a-scrollToAnimate').forEach((el) => {\n  new ScrollToAnimate(el);\n});\n","import React from \"react\";\nimport ReactDOM from \"react-dom\";\nimport Search from \"./components/search/Search\";\n\nconst navSearch = document.querySelector(\".Nav-search\");\nif (navSearch) {\n  // conditional added to handle eslint error: ReactDOM.render is deprecated since React 18.0.0, use createRoot instead\n  if (ReactDOM.createRoot) {\n    const root = ReactDOM.createRoot(navSearch);\n    root.render(<Search />);\n  } else {\n    ReactDOM.render(<Search />, navSearch);\n  }\n}\n","//------------------------------------------------------------------------\n// Notice for international shipping\n//-----------------------------------------------------------------------\n\nexport default class ShippingNotice {\n  constructor(el) {\n    this.el = el;\n    // Get the country select field based on the class of the parent element\n    this.countrySelect = this.el.classList.contains('woocommerce-shipping-fields')\n      ? this.el.querySelector('#shipping_country')\n      : this.el.querySelector('#billing_country');\n    this.shipToDifferentAddress = document.querySelector('#ship-to-different-address-checkbox');\n    \n    if (!this.countrySelect) return; // bail if no country select\n    \n    this.applyShippingNotice(); // check on page load\n\n    // listen for changes to the country select\n    $(this.countrySelect).on('change', () => {\n      this.applyShippingNotice();\n    });\n\n    // listen for changes to the ship to different address checkbox\n    if (this.shipToDifferentAddress) {\n      $(this.shipToDifferentAddress).on('change', () => {\n        this.applyShippingNotice();\n      });\n    }\n  }\n\n  // Check if the country selects are set to US, and show a notice if they aren't\n  applyShippingNotice() {\n    const noticeClass = 'shipping-notice';\n    let notice = this.el.querySelector(`.${noticeClass}`);\n    let shippingFieldsExposed = this.shipToDifferentAddress && this.shipToDifferentAddress.checked // check if shipping fields are exposed\n\n    // Show the notice on the shipping select field if shipping fields are exposed, or on the billing select field if they aren't\n    if ((this.countrySelect.value !== 'US' && this.countrySelect.id === \"shipping_country\" && shippingFieldsExposed) || (this.countrySelect.value !== 'US' && !shippingFieldsExposed)) {\n      // add an after element to the country select if there isn't one already\n      if (!this.el.querySelector('.shipping-notice')) {\n        // Create notice only if it doesn't already exist\n        notice = document.createElement('p');\n        notice.classList.add(noticeClass);\n        notice.textContent = 'International shipments may experience Customs delays, taxes, or fees. Please be aware that Customs may require additional information before your package can be released. The O’Keeffe Museum is not responsible for any duties, taxes, or tariffs upon delivery. Should Customs return your package to us, we will refund the item cost, though shipping costs may not be refundable.';\n        this.countrySelect.insertAdjacentElement('afterend', notice);\n      }\n    } else {\n      // Remove notices if shipping in the US\n      if (notice) notice.remove();\n    }\n  }\n}\n\n// Init\ndocument.querySelectorAll('.woocommerce-billing-fields, .woocommerce-shipping-fields').forEach((el) => {\n  new ShippingNotice(el);\n});","//------------------------------------------------------------------------\n// Site Wide Banner dismiss behavior\n//-----------------------------------------------------------------------\nimport Cookies from '../../../../node_modules/js-cookie/dist/js.cookie.mjs'\n\nexport default class SiteWideBanner {\n  constructor(el) {\n    this.el = el;\n    this.dismiss = el.querySelector(\".SiteWideBanner-dismiss\");\n\n    if (Cookies.get('banner') && Cookies.get('banner') != \"dismissed\") {\n      $(this.el).slideDown();\n    }\n\n    this.dismiss.addEventListener('click', function (evt) {\n      const parentBanner = evt.target.closest('.SiteWideBanner');\n      $(parentBanner).slideUp();\n      Cookies.set('banner', \"dismissed\", { expires: 1 })\n    });\n  }\n}\n\n// Init\ndocument.querySelectorAll('.SiteWideBanner').forEach((el) => {\n  new SiteWideBanner(el);\n});\n","//------------------------------------------------------------------------\n// Homepage Location Box\n// toggles location details on mobile\n//------------------------------------------------------------------------\n\nexport default class Tabs {\n  constructor() {\n    var tablist = document.querySelectorAll('[role=\"tablist\"]')[0];\n    var tabs;\n    var panels;\n    var delay = 300;\n\n    generateArrays();\n\n    function generateArrays() {\n      tabs = document.querySelectorAll('[role=\"tab\"]');\n      panels = document.querySelectorAll('[role=\"tabpanel\"]');\n    }\n\n    // For easy reference\n    var keys = {\n      end: 35,\n      home: 36,\n      left: 37,\n      up: 38,\n      right: 39,\n      down: 40,\n      delete: 46,\n    };\n\n    // Add or subtract depending on key pressed\n    var direction = {\n      37: -1,\n      38: -1,\n      39: 1,\n      40: 1,\n    };\n\n    const urlParts = document.URL.split(\"#\");\n    const anchor = urlParts.length > 1 ? urlParts[1] : false;\n\n    if (anchor == \"online\") {\n      activateTab(tabs[1]);\n    }\n\n    // Bind listeners\n    for (var i = 0; i < tabs.length; ++i) {\n      addListeners(i);\n    }\n\n    function addListeners(index) {\n      tabs[index].addEventListener(\"click\", clickEventListener);\n      tabs[index].addEventListener(\"keydown\", keydownEventListener);\n      tabs[index].addEventListener(\"keyup\", keyupEventListener);\n\n      // Build an array with all tabs (<button>s) in it\n      tabs[index].index = index;\n    }\n\n    // When a tab is clicked, activateTab is fired to activate it\n    function clickEventListener(event) {\n      var tab = event.target;\n      activateTab(tab, false);\n    }\n\n    // Handle keydown on tabs\n    function keydownEventListener(event) {\n      var key = event.keyCode;\n\n      switch (key) {\n        case keys.end:\n          event.preventDefault();\n          // Activate last tab\n          activateTab(tabs[tabs.length - 1]);\n          break;\n        case keys.home:\n          event.preventDefault();\n          // Activate first tab\n          activateTab(tabs[0]);\n          break;\n\n        // Up and down are in keydown\n        // because we need to prevent page scroll >:)\n        case keys.up:\n        case keys.down:\n          determineOrientation(event);\n          break;\n      }\n    }\n\n    // Handle keyup on tabs\n    function keyupEventListener(event) {\n      var key = event.keyCode;\n\n      switch (key) {\n        case keys.left:\n        case keys.right:\n          determineOrientation(event);\n          break;\n        case keys.delete:\n          determineDeletable(event);\n          break;\n      }\n    }\n\n    // When a tablist’s aria-orientation is set to vertical,\n    // only up and down arrow should function.\n    // In all other cases only left and right arrow function.\n    function determineOrientation(event) {\n      var key = event.keyCode;\n      var vertical = tablist.getAttribute(\"aria-orientation\") == \"vertical\";\n      var proceed = false;\n\n      if (vertical) {\n        if (key === keys.up || key === keys.down) {\n          event.preventDefault();\n          proceed = true;\n        }\n      } else {\n        if (key === keys.left || key === keys.right) {\n          proceed = true;\n        }\n      }\n\n      if (proceed) {\n        switchTabOnArrowPress(event);\n      }\n    }\n\n    // Either focus the next, previous, first, or last tab\n    // depending on key pressed\n    function switchTabOnArrowPress(event) {\n      var pressed = event.keyCode;\n\n      for (var x = 0; x < tabs.length; x++) {\n        tabs[x].addEventListener(\"focus\", focusEventHandler);\n      }\n\n      if (direction[pressed]) {\n        var target = event.target;\n        if (target.index !== undefined) {\n          if (tabs[target.index + direction[pressed]]) {\n            tabs[target.index + direction[pressed]].focus();\n          } else if (pressed === keys.left || pressed === keys.up) {\n            focusLastTab();\n          } else if (pressed === keys.right || pressed == keys.down) {\n            focusFirstTab();\n          }\n        }\n      }\n    }\n\n    // Activates any given tab panel\n    function activateTab(tab, setFocus) {\n      setFocus = setFocus || true;\n      // Deactivate all other tabs\n      deactivateTabs();\n\n      // Remove tabindex attribute\n      tab.removeAttribute(\"tabindex\");\n\n      // Set the tab as selected\n      tab.setAttribute(\"aria-selected\", \"true\");\n\n      // Get the value of aria-controls (which is an ID)\n      var controls = tab.getAttribute(\"aria-controls\");\n\n      // Remove is-hidden class from tab panel to make it visible\n      document.getElementById(controls).classList.remove(\"is-hidden\");\n\n      // Set focus when required\n      if (setFocus) {\n        tab.focus();\n      }\n    }\n\n    // Deactivate all tabs and tab panels\n    function deactivateTabs() {\n      for (var t = 0; t < tabs.length; t++) {\n        tabs[t].setAttribute(\"tabindex\", \"-1\");\n        tabs[t].setAttribute(\"aria-selected\", \"false\");\n        tabs[t].removeEventListener(\"focus\", focusEventHandler);\n      }\n\n      for (var p = 0; p < panels.length; p++) {\n        panels[p].classList.add(\"is-hidden\");\n      }\n    }\n\n    // Make a guess\n    function focusFirstTab() {\n      tabs[0].focus();\n    }\n\n    // Make a guess\n    function focusLastTab() {\n      tabs[tabs.length - 1].focus();\n    }\n\n    // Detect if a tab is deletable\n    function determineDeletable(event) {\n      var target = event.target;\n\n      if (target.getAttribute(\"data-deletable\") !== null) {\n        // Delete target tab\n        deleteTab(event, target);\n\n        // Update arrays related to tabs widget\n        generateArrays();\n\n        // Activate the closest tab to the one that was just deleted\n        if (target.index - 1 < 0) {\n          activateTab(tabs[0]);\n        } else {\n          activateTab(tabs[target.index - 1]);\n        }\n      }\n    }\n\n    // Deletes a tab and its panel\n    function deleteTab(event) {\n      var target = event.target;\n      var panel = document.getElementById(target.getAttribute(\"aria-controls\"));\n\n      target.parentElement.removeChild(target);\n      panel.parentElement.removeChild(panel);\n    }\n\n    //\n    function focusEventHandler(event) {\n      var target = event.target;\n\n      setTimeout(checkTabFocus, delay, target);\n    }\n\n    // Only activate tab on focus if it still has focus after the delay\n    function checkTabFocus(target) {\n      var focused = document.activeElement;\n\n      if (target === focused) {\n        activateTab(target, false);\n      }\n    }\n  }\n}\n\n// Init\nnew Tabs();\n","import React from \"react\";\n\nconst Icon = ({ name }) => {\n  switch (name) {\n    case \"search\":\n      return (\n        <svg\n          width=\"26\"\n          height=\"26\"\n          viewBox=\"0 0 26 26\"\n          fill=\"none\"\n          xmlns=\"http://www.w3.org/2000/svg\"\n        >\n          <path\n            d=\"M11.375 21.125C16.7598 21.125 21.125 16.7598 21.125 11.375C21.125 5.99022 16.7598 1.625 11.375 1.625C5.99022 1.625 1.625 5.99022 1.625 11.375C1.625 16.7598 5.99022 21.125 11.375 21.125Z\"\n            stroke=\"#000\"\n            strokeWidth=\"2\"\n            strokeLinecap=\"round\"\n            strokeLinejoin=\"round\"\n          />\n          <path\n            d=\"M18.6875 18.6875L24.375 24.375\"\n            stroke=\"#000\"\n            strokeWidth=\"2\"\n            strokeLinecap=\"round\"\n            strokeLinejoin=\"round\"\n          />\n        </svg>\n      );\n    case \"rightArrow\":\n      return (\n        <svg\n          width=\"16\"\n          height=\"9\"\n          viewBox=\"0 0 16 9\"\n          fill=\"none\"\n          xmlns=\"http://www.w3.org/2000/svg\"\n        >\n          <path\n            fillRule=\"evenodd\"\n            clipRule=\"evenodd\"\n            d=\"M0 4.5C0 4.36741 0.0602 4.24025 0.167357 4.1465C0.274514 4.05274 0.41985 4.00007 0.571392 4.00007H14.0482L10.4519 0.854512C10.3446 0.760638 10.2843 0.633318 10.2843 0.500561C10.2843 0.367804 10.3446 0.240484 10.4519 0.146611C10.5592 0.0527374 10.7047 3.12787e-09 10.8565 0C11.0082 -3.12787e-09 11.1537 0.0527375 11.261 0.146611L15.8321 4.14605C15.8853 4.19249 15.9276 4.24766 15.9564 4.30839C15.9852 4.36913 16 4.43424 16 4.5C16 4.56576 15.9852 4.63087 15.9564 4.69161C15.9276 4.75234 15.8853 4.80751 15.8321 4.85395L11.261 8.85339C11.1537 8.94726 11.0082 9 10.8565 9C10.7047 9 10.5592 8.94726 10.4519 8.85339C10.3446 8.75952 10.2843 8.6322 10.2843 8.49944C10.2843 8.36668 10.3446 8.23936 10.4519 8.14549L14.0482 4.99993H0.571392C0.41985 4.99993 0.274514 4.94726 0.167357 4.8535C0.0602 4.75975 0 4.63259 0 4.5Z\"\n            fill=\"white\"\n          />\n        </svg>\n      );\n  }\n};\n\nexport default Icon;\n","import React, { useEffect, useState } from \"react\";\nimport OpenSeaDragon from \"openseadragon\";\n\nconst ImageViewer = ({imageViews}) => {\n  const [viewer, setViewer] = useState();\n\n  useEffect(() => {\n    if (viewer) {\n      const tileSources = imageViews;\n\n      viewer.open(tileSources);\n\n    }\n    // we only care about the object prop, ignore other dependencies\n    // eslint-disable-next-line\n  }, [viewer]);\n\n  useEffect(() => {\n    initOpenSeaDragon();\n\n    return () => {\n      // clean up by destroying this viewer when unmounting\n      viewer && viewer.destroy();\n    };\n    // we only want to run this once, dont worry about other dependencies\n    // eslint-disable-next-line\n  }, []);\n\n  const initOpenSeaDragon = () => {\n    viewer && viewer.destroy();\n\n    const newViewer = OpenSeaDragon({\n      id: \"viewer\",\n      sequenceMode: true,\n      zoomInButton:   \"zoom-in\",\n      zoomOutButton:  \"zoom-out\",\n      previousButton: \"previous\",\n      nextButton: \"next\",\n      homeButton: \"home\",\n      fullPageButton: \"full-page\",\n    });\n\n    setViewer(newViewer);\n  };\n\n  return (\n    <div className=\"Lightbox-viewer\" id=\"viewer\" style={{ height: \"70vh\", width: \"100%\" }}></div>\n  )\n};\n\nexport default ImageViewer;","import React, { useState, useEffect, useRef } from \"react\";\nimport Modal from \"react-modal\";\nimport scroll from \"@threespot/freeze-scroll\";\n\nimport ImageViewer from \"./ImageViewer\";\nimport useOnScreen from \"../../hooks/useOnScreen\";\n\nconst lightbox = document.querySelector(\".Lightbox\");\nif (lightbox) {\n  Modal.setAppElement(\".Lightbox\");\n}\n\nconst Lightbox = ({ imageId }) => {\n  const [modalOpen, setModalOpen] = useState(false);\n  const [imageObect, setImageObject] = useState({});\n  const [imageObectLoaded, setImageObjectLoaded] = useState(false);\n  const [imageCollectionURL, setImageCollectionURL] = useState('');\n  const [imageDimensions, setImageDimensions] = useState('');\n  const [imageCredit, setImageCredit] = useState('');\n  const [imageViews, setImageViews] = useState([]);\n  const [imageIiifID, setImageIiifID] = useState('');\n  const [imageYear, setImageYear] = useState('');\n  const [imagePrintURL, setImagePrintURL] = useState('');\n\n  // Check if element is visible for lazy loading Collections data\n  const ref = useRef()\n  const isVisible = useOnScreen(ref)\n\n  useEffect(() => {\n    if (modalOpen) {\n      scroll.freeze();\n    } else {\n      scroll.unfreeze();\n    }\n  }, [modalOpen]);\n\n  const customStyles = {\n    overlay: {\n      zIndex: 1000,\n      backgroundColor: \"transparent\",\n    },\n    content: {\n      backdropFilter: \"blur(10px)\",\n      background: \"#f5f2ed\",\n      bottom: 0,\n      border: 0,\n      left: 0,\n      inset: 0,\n      padding: 0,\n      right: 0,\n      top: 0,\n    },\n  };\n\n  const openLighbox = (event) => {\n    const mouseUp = event.clientX;\n    if (\n      // need to distinguish drag events vs click events for the art collection grab scroll component\n      event.target.className == \"Lightbox-toggle\" &&\n      mouseUp < window.checkForDrag + 6 &&\n      mouseUp > window.checkForDrag - 6\n    ) {\n      setModalOpen(!modalOpen);\n    } else if (\n      event.target.className != \"Lightbox-toggle\"\n    ) {\n      setModalOpen(!modalOpen);\n    }\n  };\n\n  // Lazy load Collections Online Data\n  if (isVisible) {\n    const url = `https://collections-search-5206855655.us-west-2.bonsaisearch.net/gokm/_search`;\n    const headers = new Headers();\n    const body = {\n        'query': {\n          'ids': {\n            'values':\n              `${imageId}`\n            }\n          }\n        }\n\n    headers.append('Content-Type', 'application/json');\n    // Basic Auth not needed on prod endpoint\n    // headers.set('Authorization', 'Basic ' + btoa(username + \":\" + password));\n\n    fetch(url, {method:'POST',\n      headers: headers,\n      body: JSON.stringify(body)\n      })\n    .then((res) => res.json())\n    .then(\n      (result) => {\n        const object = result.hits.hits[0]._source;\n\n        setImageObject(object);\n        setImageCollectionURL(object.site_link.collection);\n        setImagePrintURL(object.site_link.print);\n        setImageDimensions(object.caption.medium_dimension);\n        setImageCredit(`${object.caption.owner}, ${object.caption.credit}, ${object.accession}`);\n\n        const imageViewArray = []\n        for (var i = 0; i < object.representation.views.length; i++) {\n          imageViewArray.push(object.representation.views[i].id);\n        }\n        setImageViews(imageViewArray);\n        setImageIiifID(imageViewArray[0].split(\"/\").pop());\n\n        const beginYear = object.timespan.begin_of_the_begin;\n        const endYear = object.timespan.end_of_the_end;\n        if (beginYear == endYear) {\n          setImageYear(beginYear);\n        } else {\n          setImageYear(`${beginYear}-${endYear}`);\n        }\n\n        if(imageObect.length != {}){\n          setImageObjectLoaded(true);\n        }\n      },\n      (error) => {\n        console.log(error);\n      }\n    );\n  };\n\n  const Toggle = () => {\n    const mouseDownCoords = e => {\n      window.checkForDrag = e.clientX;\n    };\n\n    return (\n      <img\n        className=\"Lightbox-toggle\"\n        onMouseDown={(event) => mouseDownCoords(event)}\n        onMouseUp={(event) => openLighbox(event)}\n        ref={ref}\n        src={imageObectLoaded ? `https://iiif.okeeffemuseum.org/image/iiif/2/${imageIiifID}/full/,600/0/default.jpg` : ''}\n        alt={imageObectLoaded ? imageObect['label'] + imageObect['note'] : ''}\n        aria-label=\"Open Deep Zoom Viewer\"\n        role=\"button\"\n      />\n    );\n  };\n\n  const Close = () => {\n    return (\n      <button\n        className=\"Lightbox-close\"\n        onClick={(event) => openLighbox(event)}\n      >\n        <span className=\"u-screenreader\">Close Deep Zoom Viewer</span>\n      </button>\n    );\n  };\n\n  return (\n    <>\n      <Toggle />\n      <Modal\n        isOpen={modalOpen}\n        style={customStyles}\n        closeTimeoutMS={300} // timeout must equal CSS animation duration\n      >\n        <div className=\"Lightbox-modal\">\n          <div className=\"Lightbox-viewer-wrap\">\n            <button className=\"Lightbox-zoomIn\" id=\"zoom-in\">\n              <span className=\"u-screenreader\">Zoom In</span>\n            </button>\n            <button className=\"Lightbox-zoomOut\" id=\"zoom-out\">\n              <span className=\"u-screenreader\">Zoom Out</span>\n            </button>\n            <button className=\"Lightbox-fullpage\" id=\"full-page\">\n              <span className=\"u-screenreader\">Fullscreen viewer</span>\n            </button>\n            <button className=\"Lightbox-home\" id=\"home\">\n              <span className=\"u-screenreader\">Revert Image</span>\n            </button>\n            {imageViews.length > 1  &&\n              <button className=\"Lightbox-prev\" id=\"previous\">\n                <span className=\"u-screenreader\">Previous Image</span>\n              </button>\n            }\n            <ImageViewer imageViews={imageViews} />\n            {imageViews.length > 1  &&\n              <button className=\"Lightbox-next\" id=\"next\">\n                <span className=\"u-screenreader\">Next Image</span>\n              </button>\n            }\n            <Close />\n          </div>\n          <div className=\"Lightbox-details bg-slate c-white l-padding\">\n            <div className=\"l-wrap--narrow\">\n              <div className=\"Lightbox-details-wrap\">\n                <div className=\"Lightbox-column\">\n                  <p className=\"Lightbox-heading\">\n                    {imageObect['label']}, {imageYear}\n                  </p>\n                  <p className=\"Lightbox-text\">\n                    {imageObect['note']}\n                  </p>\n                  <p className=\"Lightbox-text\">\n                    Artist: {imageObect['artist_label']}\n                  </p>\n                </div>\n                <div className=\"Lightbox-column\">\n                  <a href={imageCollectionURL} className=\"Lightbox-link\">\n                    View in Collections\n                  </a>\n                  <a href={imagePrintURL} className=\"Lightbox-link\">\n                    Order Print\n                  </a>\n                  <p className=\"Lightbox-text\">{imageDimensions}</p>\n                  <p className=\"mb-2\">\n                    © {imageCredit}\n                  </p>\n                  <a href=\"http://rightsstatements.org/page/InC/1.0/?language=en\" className=\"Lightbox-link\">\n                    View rights statement\n                  </a>\n                  <a href=\"https://arsny.com/licensing-requests/\" className=\"Lightbox-link\">\n                    License this image\n                  </a>\n                </div>\n              </div>\n            </div>\n          </div>\n        </div>\n      </Modal>\n    </>\n  );\n};\n\nexport default Lightbox;\n","import React, { useState, useEffect } from \"react\";\nimport useDebounce from \"../../hooks/useDebounce\";\nimport Icon from \"../Icon\";\n\nconst CollectionResults = ({ query, setHasResults }) => {\n  const [error, setError] = useState(null);\n  const [isLoaded, setIsLoaded] = useState(false);\n  const [items, setItems] = useState([]);\n  const [total, setTotal] = useState([]);\n  const debouncedQuery = useDebounce(query, 200);\n\n  useEffect(() => {\n    setIsLoaded(false);\n  }, [query]);\n\n  useEffect(() => {\n    if (debouncedQuery) {\n      fetch(\n        `https://collections-search-5206855655.us-west-2.bonsaisearch.net/gokm/_search?q=${encodeURIComponent(\n          query\n        )}`\n      )\n        .then((res) => res.json())\n        .then(\n          (result) => {\n            setIsLoaded(true);\n            if (result.hits.hits.length > 0 ) {\n              setItems(result.hits.hits);\n              setTotal(result.hits.total);\n              setHasResults(true);\n            }\n          },\n          (error) => {\n            setIsLoaded(true);\n            setError(error);\n          }\n        );\n    } else {\n      setItems([]);\n      setHasResults(false);\n    }\n  }, [debouncedQuery]);\n\n  const Result = ({ item }) => {\n    let imgId = null;\n\n    // Get image id from representation URL\n    if (item._source.representation && item._source.representation.views && item._source.representation.views[0]) {\n      imgId = item._source.representation.views[0].id.split(\"/\").pop();\n    }\n\n    const imgSrc = (item._source.representation && item._source.representation.views && item._source.representation.views[0])\n      ? `https://iiif.okeeffemuseum.org/image/iiif/2/${imgId}/full/,600/0/default.jpg`\n      : \"https://collections.okeeffemuseum.org/assets/no-image.png\";\n\n    return (\n      <div\n        style={{\n          marginTop: \"20px\",\n          marginRight: \"40px\",\n          flexShrink: 0,\n        }}\n      >\n        <a\n          className=\"SearchResults-CollectionsItem c-link-black\"\n          href={`https://collections.okeeffemuseum.org/${item._id}/`}\n          style={{ display: \"table\" }}\n        >\n          <img\n            className=\"SearchResults-CollectionsItem-image\"\n            src={imgSrc}\n            aria-hidden=\"true\"\n            role=\"presentation\"\n          />\n          <br />\n          <span\n            style={{\n              display: \"table-caption\",\n              captionSide: \"bottom\",\n              paddingTop: \"12px\",\n            }}\n          >\n            {item._source.label}\n          </span>\n        </a>\n      </div>\n    );\n  };\n\n  if (error) {\n    return <div>Error: {error.message}</div>;\n  } else if (isLoaded && query) {\n    return (\n      <>\n        <div\n          className=\"SearchResults-header\"\n        >\n          <h2 className=\"f-h2\">From the Collection</h2>\n\n          {items.length > 0 && (\n            <a\n              href={`https://collections.okeeffemuseum.org/search/#query_string=${query}`}\n              className=\"c-link-arrow-black\"\n            >\n              See {total} item{parseInt(total) > 1 ? \"s\" : null} in the\n              Collection\n              <Icon name=\"rightArrow\" />\n            </a>\n          )}\n\n          {items.length === 0 && (\n            <a\n              href={`https://collections.okeeffemuseum.org`}\n              className=\"c-link-arrow-black\"\n            >\n              Go to Collection\n              <Icon name=\"rightArrow\" />\n            </a>\n          )}\n        </div>\n        {items.length > 0 && (\n          <div className=\"l-fullwidth--right\">\n            <div\n              style={{\n                display: \"flex\",\n                overflow: \"scroll\",\n              }}\n            >\n              {/* Filter out items with no image, limit to 6 */}\n              {items\n                .filter((item) => item._source.representation)\n                .slice(0, 6)\n                .map((item, i) => (\n                  <Result key={i} item={item} />\n                ))}\n            </div>\n          </div>\n        )}\n\n        {items.length === 0 && (\n          <div\n            className=\"u-center\"\n            style={{ paddingTop: \"200px\", paddingBottom: \"200px\" }}\n          >\n            <p className=\"f-h3\">\n              No results in collections\n              <br /> for \"{query}\"\n            </p>\n          </div>\n        )}\n      </>\n    );\n  } else {\n    return null;\n  }\n};\n\nexport default CollectionResults;\n","import React from \"react\";\nimport Icon from \"../Icon\";\n\nconst Header = ({ setModalOpen, query, setQuery }) => {\n  return (\n    <header className=\"Header bg-white l-padding\" style={{ boxShadow: \"none\" }}>\n      <div className=\"l-wrap--wide\">\n        <div className=\"Header-top\" style={{ display: \"flex\" }}>\n          <a href=\"/\" className=\"Header-logo-link\">\n            <svg\n              xmlns=\"http://www.w3.org/2000/svg\"\n              width=\"76\"\n              height=\"76\"\n              viewBox=\"0 0 76 76\"\n              fill=\"none\"\n              focusable=\"false\"\n              aria-hidden=\"true\"\n              className=\"Header-logo-image\"\n            >\n              <path d=\"M76 76V0H0V76H76Z\" fill=\"black\"></path>\n              <path\n                d=\"M67.4925 61.4865V56.4726C67.4925 54.4406 66.6428 53.4537 64.8906 53.4537C64.315 53.4631 63.7529 53.6293 63.2647 53.9343C62.7765 54.2393 62.3806 54.6716 62.1198 55.1848C61.8348 54.0342 61.0642 53.4537 59.7606 53.4537C59.2114 53.4715 58.677 53.6361 58.213 53.9303C57.7489 54.2245 57.3721 54.6377 57.1217 55.1267C57.1217 55.0212 57.1217 54.8681 57.1217 54.7045V53.649H55.6017V61.4865H57.185V57.8976C57.1758 57.561 57.2059 57.2244 57.2748 56.8948C57.5967 55.6756 58.457 54.884 59.465 54.884C60.4731 54.884 60.7792 55.6492 60.7792 56.7945V61.4865H62.3625V57.8976C62.3552 57.5428 62.3906 57.1884 62.4681 56.842C62.7214 55.8709 63.4814 54.8892 64.6109 54.8892C65.3075 54.8892 65.9514 55.1215 65.9514 56.7998V61.4917L67.4925 61.4865ZM67.4503 41.0931C67.4503 41.0931 67.4925 40.6445 67.4925 40.444C67.5234 39.4971 67.2145 38.5705 66.6217 37.8315C66.3043 37.4722 65.9108 37.1881 65.4699 37.0001C65.0289 36.812 64.5515 36.7246 64.0725 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</svg>\n          </a>\n\n          <form\n            style={{\n              display: \"block\",\n              width: \"100%\",\n              position: \"relative\",\n            }}\n          >\n            <input\n              className=\"Header-input\"\n              type=\"text\"\n              autoFocus={true}\n              placeholder=\"Search\"\n              defaultValue={query}\n              onChange={(evt) => setQuery(evt.target.value)}\n              name=\"s\"\n            />\n            {/* <button\n              type=\"button\"\n              className=\"btn-reset\"\n              style={{ position: \"absolute\", top: \"-12px\", right: 0 }}\n            >\n              <Icon name=\"search\" />\n              <span className=\"u-screenreader\">Search</span>\n            </button> */}\n          </form>\n\n          <button\n            onClick={() => setModalOpen(false)}\n            className=\"btn-reset\"\n            style={{\n              position: \"relative\",\n              right: \"-15px\",\n            }}\n          >\n            <svg\n              width=\"28\"\n              height=\"28\"\n              viewBox=\"0 0 28 28\"\n              fill=\"none\"\n              xmlns=\"http://www.w3.org/2000/svg\"\n            >\n              <path\n                d=\"M1.5 27L27 1.5M27 27L1.5 1.5\"\n                stroke=\"black\"\n                strokeWidth=\"2\"\n              />\n            </svg>\n          </button>\n        </div>\n      </div>\n    </header>\n  );\n};\n\nexport default Header;\n","import React, { useState, useEffect } from \"react\";\nimport Modal from \"react-modal\";\nimport scroll from \"@threespot/freeze-scroll\";\n\nimport Header from \"./Header\";\nimport Icon from \"../Icon\";\nimport WebResults from \"./WebResults\";\nimport CollectionResults from \"./CollectionResults\";\n\n\nconst globalNav = document.querySelector(\".Nav-search\");\nif (globalNav) {\n  Modal.setAppElement(\".Nav-search\");\n}\n\nconst Search = () => {\n  const [modalOpen, setModalOpen] = useState(false);\n  const [hasResults, setHasResults] = useState(false);\n  const [query, setQuery] = useState(\"\");\n\n  const customStyles = {\n    overlay: {\n      zIndex: 1000,\n      backgroundColor: \"transparent\",\n    },\n    content: {\n      border: 0,\n      inset: 0,\n      padding: 0,\n      background: hasResults ? \"#f5f2ed\" : \"rgba(245, 242, 237, 0.9)\",\n      backdropFilter: \"blur(10px)\",\n      top: 0,\n      bottom: 0,\n      left: 0,\n      right: 0\n    },\n  };\n\n  useEffect(() => {\n    if (modalOpen) {\n      scroll.freeze();\n    } else {\n      scroll.unfreeze();\n      // setQuery(\"\");\n    }\n  }, [modalOpen]);\n\n  const Toggle = () => {\n    return (\n      <button\n        className=\"Nav-search-submit btn\"\n        onClick={() => setModalOpen(!modalOpen)}\n      >\n        <Icon name=\"search\" />\n        <span className=\"u-screenreader\">Search</span>\n      </button>\n    );\n  };\n\n  return (\n    <>\n      <Toggle />\n      <Modal\n        isOpen={modalOpen}\n        style={customStyles}\n        closeTimeoutMS={300} // timeout must equal CSS animation duration\n      >\n        <Header setModalOpen={setModalOpen} query={query} setQuery={setQuery} />\n        <div className=\"l-padding\">\n          <div className=\"l-wrap\" style={{ paddingBottom: \"200px\" }}>\n            <CollectionResults query={query} setHasResults={setHasResults} />\n            <WebResults query={query} setHasResults={setHasResults} />\n          </div>\n        </div>\n      </Modal>\n    </>\n  );\n};\n\nexport default Search;\n","import React, { useEffect, useState } from \"react\";\nimport useDebounce from \"../../hooks/useDebounce\";\nimport Icon from \"../Icon\";\n\nconst WebResults = ({ query, setHasResults }) => {\n  const [error, setError] = useState(null);\n  const [isLoaded, setIsLoaded] = useState(false);\n  const [items, setItems] = useState([]);\n  const debouncedQuery = useDebounce(query, 200);\n\n  useEffect(() => {\n    setIsLoaded(false);\n  }, [query]);\n\n  useEffect(() => {\n    if (debouncedQuery) {\n      fetch(`/wp-json/wp/v2/search?search=${encodeURIComponent(query)}&_embed`)\n        .then((res) => res.json())\n        .then(\n          (result) => {\n            setIsLoaded(true);\n            setItems(result);\n            setHasResults(true);\n          },\n          (error) => {\n            setIsLoaded(true);\n            setError(error);\n          }\n        );\n    } else {\n      setItems([]);\n      setHasResults(false);\n    }\n  }, [debouncedQuery]);\n\n  const Result = ({ item }) => {\n    const imageUrl = item._embedded.self[0].featured_image_src;\n    const postLabels = item._embedded.self[0].custom_post_labels;\n\n    const getDate = () => {\n      const postTypes = [\"post\", \"news\"];\n      if (postTypes.includes(item.subtype)) {\n        const options = {\n          year: \"numeric\",\n          month: \"short\",\n          day: \"numeric\",\n        };\n        const date = new Date(item._embedded.self[0].date);\n        return date.toLocaleDateString(\"en-us\", options);\n      } else {\n        return false;\n      }\n    };\n\n    const date = getDate();\n\n    return (\n      <li className=\"Listing-item\">\n        <article className=\"Listing-item-wrap\">\n          {imageUrl && (\n            <a href={item.link} tabIndex=\"-1\" className=\"Listing-thumbnail\">\n              <img\n                className=\"Listing-thumbnail-image\"\n                src={imageUrl}\n                aria-hidden=\"true\"\n                role=\"presentation\"\n              />\n            </a>\n          )}\n          <div className=\"Listing-text\">\n            {postLabels && postLabels.length && (\n              <p className=\"Listing-labels\">\n                {postLabels.map((label, key) => (\n                  <span key={key} className=\"Listing-labels-text f-eyebrow\">\n                    {label}\n                  </span>\n                ))}\n              </p>\n            )}\n            <p className=\"Listing-title\">\n              <a\n                href={item.url}\n                className=\"Listing-title-link\"\n                // render escaped post titles\n                dangerouslySetInnerHTML={{ __html: item.title }}\n              />\n            </p>\n            {date && (\n              <div className=\"Listing-meta\">\n                <time className=\"Listing-meta-date\">{date}</time>\n              </div>\n            )}\n          </div>\n        </article>\n\n        <a\n          href={item.url}\n          tabIndex=\"-1\"\n          className=\"Listing-link\"\n          aria-hidden=\"true\"\n          focusable=\"false\"\n        ></a>\n      </li>\n    );\n  };\n\n  if (error) {\n    return <div>Error: {error.message}</div>;\n  } else if (isLoaded && query) {\n    return (\n      <>\n        <div\n          className=\"SearchResults-header\"\n        >\n          <h2 className=\"f-h2 mt-3\">Website Results</h2>\n          <a href={`/?s=${query}`} className=\"c-link-arrow-black\">\n            {items.length ? \"View and filter Results\" : \"Advanced Search\"}\n            <Icon name=\"rightArrow\" />\n          </a>\n        </div>\n        <div className=\"SearchResults-wrap l-wrap--narrow\">\n          <div className=\"Listing\">\n            <ul className=\"Listing-list\">\n              {items.map((item) => (\n                <Result key={item.id} item={item} />\n              ))}\n            </ul>\n\n            {items.length === 0 && (\n              <div\n                className=\"u-center\"\n                style={{ paddingTop: \"200px\", paddingBottom: \"200px\" }}\n              >\n                <p className=\"f-h3\">\n                  No website results for\n                  <br /> for \"{query}\"\n                </p>\n              </div>\n            )}\n\n            <div className=\"u-center\">\n              <a href={`/?s=${query}`} className=\"c-link-arrow-black\">\n                View More and filter Results\n                <Icon name=\"rightArrow\" />\n              </a>\n            </div>\n          </div>\n        </div>\n      </>\n    );\n  } else {\n    return null;\n  }\n};\n\nexport default WebResults;\n","/*!\n  Copyright (c) 2015 Jed Watson.\n  Based on code that is Copyright 2013-2015, Facebook, Inc.\n  All rights reserved.\n*/\n/* global define */\n\n(function () {\n\t'use strict';\n\n\tvar canUseDOM = !!(\n\t\ttypeof window !== 'undefined' &&\n\t\twindow.document &&\n\t\twindow.document.createElement\n\t);\n\n\tvar ExecutionEnvironment = {\n\n\t\tcanUseDOM: canUseDOM,\n\n\t\tcanUseWorkers: typeof Worker !== 'undefined',\n\n\t\tcanUseEventListeners:\n\t\t\tcanUseDOM && !!(window.addEventListener || window.attachEvent),\n\n\t\tcanUseViewport: canUseDOM && !!window.screen\n\n\t};\n\n\tif (typeof define === 'function' && typeof define.amd === 'object' && define.amd) {\n\t\tdefine(function () {\n\t\t\treturn ExecutionEnvironment;\n\t\t});\n\t} else if (typeof module !== 'undefined' && module.exports) {\n\t\tmodule.exports = ExecutionEnvironment;\n\t} else {\n\t\twindow.ExecutionEnvironment = ExecutionEnvironment;\n\t}\n\n}());\n","/*\nobject-assign\n(c) Sindre Sorhus\n@license MIT\n*/\n\n'use strict';\n/* eslint-disable no-unused-vars */\nvar getOwnPropertySymbols = Object.getOwnPropertySymbols;\nvar hasOwnProperty = Object.prototype.hasOwnProperty;\nvar propIsEnumerable = Object.prototype.propertyIsEnumerable;\n\nfunction toObject(val) {\n\tif (val === null || val === undefined) {\n\t\tthrow new TypeError('Object.assign cannot be called with null or undefined');\n\t}\n\n\treturn Object(val);\n}\n\nfunction shouldUseNative() {\n\ttry {\n\t\tif (!Object.assign) {\n\t\t\treturn false;\n\t\t}\n\n\t\t// Detect buggy property enumeration order in older V8 versions.\n\n\t\t// https://bugs.chromium.org/p/v8/issues/detail?id=4118\n\t\tvar test1 = new String('abc');  // eslint-disable-line no-new-wrappers\n\t\ttest1[5] = 'de';\n\t\tif (Object.getOwnPropertyNames(test1)[0] === '5') {\n\t\t\treturn false;\n\t\t}\n\n\t\t// https://bugs.chromium.org/p/v8/issues/detail?id=3056\n\t\tvar test2 = {};\n\t\tfor (var i = 0; i < 10; i++) {\n\t\t\ttest2['_' + String.fromCharCode(i)] = i;\n\t\t}\n\t\tvar order2 = Object.getOwnPropertyNames(test2).map(function (n) {\n\t\t\treturn test2[n];\n\t\t});\n\t\tif (order2.join('') !== '0123456789') {\n\t\t\treturn false;\n\t\t}\n\n\t\t// https://bugs.chromium.org/p/v8/issues/detail?id=3056\n\t\tvar test3 = {};\n\t\t'abcdefghijklmnopqrst'.split('').forEach(function (letter) {\n\t\t\ttest3[letter] = letter;\n\t\t});\n\t\tif (Object.keys(Object.assign({}, test3)).join('') !==\n\t\t\t\t'abcdefghijklmnopqrst') {\n\t\t\treturn false;\n\t\t}\n\n\t\treturn true;\n\t} catch (err) {\n\t\t// We don't expect any of the above to throw, but better to be safe.\n\t\treturn false;\n\t}\n}\n\nmodule.exports = shouldUseNative() ? Object.assign : function (target, source) {\n\tvar from;\n\tvar to = toObject(target);\n\tvar symbols;\n\n\tfor (var s = 1; s < arguments.length; s++) {\n\t\tfrom = Object(arguments[s]);\n\n\t\tfor (var key in from) {\n\t\t\tif (hasOwnProperty.call(from, key)) {\n\t\t\t\tto[key] = from[key];\n\t\t\t}\n\t\t}\n\n\t\tif (getOwnPropertySymbols) {\n\t\t\tsymbols = getOwnPropertySymbols(from);\n\t\t\tfor (var i = 0; i < symbols.length; i++) {\n\t\t\t\tif (propIsEnumerable.call(from, symbols[i])) {\n\t\t\t\t\tto[symbols[i]] = from[symbols[i]];\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t}\n\n\treturn to;\n};\n","//! openseadragon 3.1.0\n//! Built on 2022-06-07\n//! Git commit: v3.1.0-1-c1c380f\n//! http://openseadragon.github.io\n//! License: http://openseadragon.github.io/license/\n\n/*\n * OpenSeadragon\n *\n * Copyright (C) 2009 CodePlex Foundation\n * Copyright (C) 2010-2013 OpenSeadragon contributors\n *\n * Redistribution and use in source and binary forms, with or without\n * modification, are permitted provided that the following conditions are\n * met:\n *\n * - Redistributions of source code must retain the above copyright notice,\n *   this list of conditions and the following disclaimer.\n *\n * - Redistributions in binary form must reproduce the above copyright\n *   notice, this list of conditions and the following disclaimer in the\n *   documentation and/or other materials provided with the distribution.\n *\n * - Neither the name of CodePlex Foundation nor the names of its\n *   contributors may be used to endorse or promote products derived from\n *   this software without specific prior written permission.\n *\n * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS\n * \"AS IS\" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT\n * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR\n * A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT\n * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,\n * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED\n * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR\n * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF\n * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING\n * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS\n * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.\n */\n\n/*\n * Portions of this source file taken from jQuery:\n *\n * Copyright 2011 John Resig\n *\n * Permission is hereby granted, free of charge, to any person obtaining\n * a copy of this software and associated documentation files (the\n * \"Software\"), to deal in the Software without restriction, including\n * without limitation the rights to use, copy, modify, merge, publish,\n * distribute, sublicense, and/or sell copies of the Software, and to\n * permit persons to whom the Software is furnished to do so, subject to\n * the following conditions:\n *\n * The above copyright notice and this permission notice shall be\n * included in all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND,\n * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF\n * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND\n * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE\n * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION\n * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION\n * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.\n */\n\n/*\n * Portions of this source file taken from mattsnider.com:\n *\n * Copyright (c) 2006-2013 Matt Snider\n *\n * Permission is hereby granted, free of charge, to any person obtaining a\n * copy of this software and associated documentation files (the \"Software\"),\n * to deal in the Software without restriction, including without limitation\n * the rights to use, copy, modify, merge, publish, distribute, sublicense,\n * and/or sell copies of the Software, and to permit persons to whom the\n * Software is furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice shall be included\n * in all copies or substantial portions of the Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS\n * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF\n * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.\n * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY\n * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT\n * OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR\n * THE USE OR OTHER DEALINGS IN THE SOFTWARE.\n */\n\n\n/**\n * @namespace OpenSeadragon\n * @version openseadragon 3.1.0\n * @classdesc The root namespace for OpenSeadragon.  All utility methods\n * and classes are defined on or below this namespace.\n *\n */\n\n\n// Typedefs\n\n /**\n  * All required and optional settings for instantiating a new instance of an OpenSeadragon image viewer.\n  *\n  * @typedef {Object} Options\n  * @memberof OpenSeadragon\n  *\n  * @property {String} id\n  *     Id of the element to append the viewer's container element to. If not provided, the 'element' property must be provided.\n  *     If both the element and id properties are specified, the viewer is appended to the element provided in the element property.\n  *\n  * @property {Element} element\n  *     The element to append the viewer's container element to. If not provided, the 'id' property must be provided.\n  *     If both the element and id properties are specified, the viewer is appended to the element provided in the element property.\n  *\n  * @property {Array|String|Function|Object} [tileSources=null]\n  *     Tile source(s) to open initially. This is a complex parameter; see\n  *     {@link OpenSeadragon.Viewer#open} for details.\n  *\n  * @property {Number} [tabIndex=0]\n  *     Tabbing order index to assign to the viewer element. Positive values are selected in increasing order. When tabIndex is 0\n  *     source order is used. A negative value omits the viewer from the tabbing order.\n  *\n  * @property {Array} overlays Array of objects defining permanent overlays of\n  *     the viewer. The overlays added via this option and later removed with\n  *     {@link OpenSeadragon.Viewer#removeOverlay} will be added back when a new\n  *     image is opened.\n  *     To add overlays which can be definitively removed, one must use\n  *     {@link OpenSeadragon.Viewer#addOverlay}\n  *     If displaying a sequence of images, the overlays can be associated\n  *     with a specific page by passing the overlays array to the page's\n  *     tile source configuration.\n  *     Expected properties:\n  *     * x, y, (or px, py for pixel coordinates) to define the location.\n  *     * width, height in point if using x,y or in pixels if using px,py. If width\n  *       and height are specified, the overlay size is adjusted when zooming,\n  *       otherwise the size stays the size of the content (or the size defined by CSS).\n  *     * className to associate a class to the overlay\n  *     * id to set the overlay element. If an element with this id already exists,\n  *       it is reused, otherwise it is created. If not specified, a new element is\n  *       created.\n  *     * placement a string to define the relative position to the viewport.\n  *       Only used if no width and height are specified. Default: 'TOP_LEFT'.\n  *       See {@link OpenSeadragon.Placement} for possible values.\n  *\n  * @property {String} [xmlPath=null]\n  *     <strong>DEPRECATED</strong>. A relative path to load a DZI file from the server.\n  *     Prefer the newer Options.tileSources.\n  *\n  * @property {String} [prefixUrl='/images/']\n  *     Prepends the prefixUrl to navImages paths, which is very useful\n  *     since the default paths are rarely useful for production\n  *     environments.\n  *\n  * @property {OpenSeadragon.NavImages} [navImages]\n  *     An object with a property for each button or other built-in navigation\n  *     control, eg the current 'zoomIn', 'zoomOut', 'home', and 'fullpage'.\n  *     Each of those in turn provides an image path for each state of the button\n  *     or navigation control, eg 'REST', 'GROUP', 'HOVER', 'PRESS'. Finally the\n  *     image paths, by default assume there is a folder on the servers root path\n  *     called '/images', eg '/images/zoomin_rest.png'.  If you need to adjust\n  *     these paths, prefer setting the option.prefixUrl rather than overriding\n  *     every image path directly through this setting.\n  *\n  * @property {Boolean} [debugMode=false]\n  *     TODO: provide an in-screen panel providing event detail feedback.\n  *\n  * @property {String} [debugGridColor=['#437AB2', '#1B9E77', '#D95F02', '#7570B3', '#E7298A', '#66A61E', '#E6AB02', '#A6761D', '#666666']]\n  *     The colors of grids in debug mode. Each tiled image's grid uses a consecutive color.\n  *     If there are more tiled images than provided colors, the color vector is recycled.\n  *\n  * @property {Boolean} [silenceMultiImageWarnings=false]\n  *     Silences warnings when calling viewport coordinate functions with multi-image.\n  *     Useful when you're overlaying multiple images on top of one another.\n  *\n  * @property {Number} [blendTime=0]\n  *     Specifies the duration of animation as higher or lower level tiles are\n  *     replacing the existing tile.\n  *\n  * @property {Boolean} [alwaysBlend=false]\n  *     Forces the tile to always blend.  By default the tiles skip blending\n  *     when the blendTime is surpassed and the current animation frame would\n  *     not complete the blend.\n  *\n  * @property {Boolean} [autoHideControls=true]\n  *     If the user stops interacting with the viewport, fade the navigation\n  *     controls.  Useful for presentation since the controls are by default\n  *     floated on top of the image the user is viewing.\n  *\n  * @property {Boolean} [immediateRender=false]\n  *     Render the best closest level first, ignoring the lowering levels which\n  *     provide the effect of very blurry to sharp. It is recommended to change\n  *     setting to true for mobile devices.\n  *\n  * @property {Number} [defaultZoomLevel=0]\n  *     Zoom level to use when image is first opened or the home button is clicked.\n  *     If 0, adjusts to fit viewer.\n  *\n  * @property {Number} [opacity=1]\n  *     Default proportional opacity of the tiled images (1=opaque, 0=hidden)\n  *     Hidden images do not draw and only load when preloading is allowed.\n  *\n  * @property {Boolean} [preload=false]\n  *     Default switch for loading hidden images (true loads, false blocks)\n  *\n  * @property {String} [compositeOperation=null]\n  *     Valid values are 'source-over', 'source-atop', 'source-in', 'source-out',\n  *     'destination-over', 'destination-atop', 'destination-in', 'destination-out',\n  *     'lighter', 'difference', 'copy', 'xor', etc.\n  *     For complete list of modes, please @see {@link https://developer.mozilla.org/en-US/docs/Web/API/CanvasRenderingContext2D/globalCompositeOperation/ globalCompositeOperation}\n  *\n  * @property {Boolean} [imageSmoothingEnabled=true]\n  *     Image smoothing for canvas rendering (only if canvas is used). Note: Ignored\n  *     by some (especially older) browsers which do not support this canvas property.\n  *     This property can be changed in {@link Viewer.Drawer.setImageSmoothingEnabled}.\n  *\n  * @property {String|CanvasGradient|CanvasPattern|Function} [placeholderFillStyle=null]\n  *     Draws a colored rectangle behind the tile if it is not loaded yet.\n  *     You can pass a CSS color value like \"#FF8800\".\n  *     When passing a function the tiledImage and canvas context are available as argument which is useful when you draw a gradient or pattern.\n  *\n  * @property {Object} [subPixelRoundingForTransparency=null]\n  *     Determines when subpixel rounding should be applied for tiles when rendering images that support transparency.\n  *     This property is a subpixel rounding enum values dictionary [{@link BROWSERS}] --> {@link SUBPIXEL_ROUNDING_OCCURRENCES}.\n  *     The key is a {@link BROWSERS} value, and the value is one of {@link SUBPIXEL_ROUNDING_OCCURRENCES},\n  *     indicating, for a given browser, when to apply subpixel rounding.\n  *     Key '*' is the fallback value for any browser not specified in the dictionary.\n  *     This property has a simple mode, and one can set it directly to\n  *     {@link SUBPIXEL_ROUNDING_OCCURRENCES.NEVER}, {@link SUBPIXEL_ROUNDING_OCCURRENCES.ONLY_AT_REST} or {@link SUBPIXEL_ROUNDING_OCCURRENCES.ALWAYS}\n  *     in order to apply this rule for all browser. The values {@link SUBPIXEL_ROUNDING_OCCURRENCES.ALWAYS} would be equivalent to { '*', SUBPIXEL_ROUNDING_OCCURRENCES.ALWAYS }.\n  *     The default is {@link SUBPIXEL_ROUNDING_OCCURRENCES.NEVER} for all browsers, for backward compatibility reason.\n  *\n  * @property {Number} [degrees=0]\n  *     Initial rotation.\n  *\n  * @property {Boolean} [flipped=false]\n  *     Initial flip state.\n  *\n  * @property {Number} [minZoomLevel=null]\n  *\n  * @property {Number} [maxZoomLevel=null]\n  *\n  * @property {Boolean} [homeFillsViewer=false]\n  *     Make the 'home' button fill the viewer and clip the image, instead\n  *     of fitting the image to the viewer and letterboxing.\n  *\n  * @property {Boolean} [panHorizontal=true]\n  *     Allow horizontal pan.\n  *\n  * @property {Boolean} [panVertical=true]\n  *     Allow vertical pan.\n  *\n  * @property {Boolean} [constrainDuringPan=false]\n  *\n  * @property {Boolean} [wrapHorizontal=false]\n  *     Set to true to force the image to wrap horizontally within the viewport.\n  *     Useful for maps or images representing the surface of a sphere or cylinder.\n  *\n  * @property {Boolean} [wrapVertical=false]\n  *     Set to true to force the image to wrap vertically within the viewport.\n  *     Useful for maps or images representing the surface of a sphere or cylinder.\n  *\n  * @property {Number} [minZoomImageRatio=0.9]\n  *     The minimum percentage ( expressed as a number between 0 and 1 ) of\n  *     the viewport height or width at which the zoom out will be constrained.\n  *     Setting it to 0, for example will allow you to zoom out infinity.\n  *\n  * @property {Number} [maxZoomPixelRatio=1.1]\n  *     The maximum ratio to allow a zoom-in to affect the highest level pixel\n  *     ratio. This can be set to Infinity to allow 'infinite' zooming into the\n  *     image though it is less effective visually if the HTML5 Canvas is not\n  *     available on the viewing device.\n  *\n  * @property {Number} [smoothTileEdgesMinZoom=1.1]\n  *     A zoom percentage ( where 1 is 100% ) of the highest resolution level.\n  *     When zoomed in beyond this value alternative compositing will be used to\n  *     smooth out the edges between tiles. This will have a performance impact.\n  *     Can be set to Infinity to turn it off.\n  *     Note: This setting is ignored on iOS devices due to a known bug (See {@link https://github.com/openseadragon/openseadragon/issues/952})\n  *\n  * @property {Boolean} [iOSDevice=?]\n  *     True if running on an iOS device, false otherwise.\n  *     Used to disable certain features that behave differently on iOS devices.\n  *\n  * @property {Boolean} [autoResize=true]\n  *     Set to false to prevent polling for viewer size changes. Useful for providing custom resize behavior.\n  *\n  * @property {Boolean} [preserveImageSizeOnResize=false]\n  *     Set to true to have the image size preserved when the viewer is resized. This requires autoResize=true (default).\n  *\n  * @property {Number} [minScrollDeltaTime=50]\n  *     Number of milliseconds between canvas-scroll events. This value helps normalize the rate of canvas-scroll\n  *     events between different devices, causing the faster devices to slow down enough to make the zoom control\n  *     more manageable.\n  *\n  * @property {Number} [rotationIncrement=90]\n  *     The number of degrees to rotate right or left when the rotate buttons or keyboard shortcuts are activated.\n  *\n  * @property {Number} [pixelsPerWheelLine=40]\n  *     For pixel-resolution scrolling devices, the number of pixels equal to one scroll line.\n  *\n  * @property {Number} [pixelsPerArrowPress=40]\n  *     The number of pixels viewport moves when an arrow key is pressed.\n  *\n  * @property {Number} [visibilityRatio=0.5]\n  *     The percentage ( as a number from 0 to 1 ) of the source image which\n  *     must be kept within the viewport.  If the image is dragged beyond that\n  *     limit, it will 'bounce' back until the minimum visibility ratio is\n  *     achieved.  Setting this to 0 and wrapHorizontal ( or wrapVertical ) to\n  *     true will provide the effect of an infinitely scrolling viewport.\n  *\n  * @property {Object} [viewportMargins={}]\n  *     Pushes the \"home\" region in from the sides by the specified amounts.\n  *     Possible subproperties (Numbers, in screen coordinates): left, top, right, bottom.\n  *\n  * @property {Number} [imageLoaderLimit=0]\n  *     The maximum number of image requests to make concurrently. By default\n  *     it is set to 0 allowing the browser to make the maximum number of\n  *     image requests in parallel as allowed by the browsers policy.\n  *\n  * @property {Number} [clickTimeThreshold=300]\n  *      The number of milliseconds within which a pointer down-up event combination\n  *      will be treated as a click gesture.\n  *\n  * @property {Number} [clickDistThreshold=5]\n  *      The maximum distance allowed between a pointer down event and a pointer up event\n  *      to be treated as a click gesture.\n  *\n  * @property {Number} [dblClickTimeThreshold=300]\n  *      The number of milliseconds within which two pointer down-up event combinations\n  *      will be treated as a double-click gesture.\n  *\n  * @property {Number} [dblClickDistThreshold=20]\n  *      The maximum distance allowed between two pointer click events\n  *      to be treated as a double-click gesture.\n  *\n  * @property {Number} [springStiffness=6.5]\n  *\n  * @property {Number} [animationTime=1.2]\n  *     Specifies the animation duration per each {@link OpenSeadragon.Spring}\n  *     which occur when the image is dragged or zoomed.\n  *\n  * @property {OpenSeadragon.GestureSettings} [gestureSettingsMouse]\n  *     Settings for gestures generated by a mouse pointer device. (See {@link OpenSeadragon.GestureSettings})\n  * @property {Boolean} [gestureSettingsMouse.dragToPan=true] - Pan on drag gesture\n  * @property {Boolean} [gestureSettingsMouse.scrollToZoom=true] - Zoom on scroll gesture\n  * @property {Boolean} [gestureSettingsMouse.clickToZoom=true] - Zoom on click gesture\n  * @property {Boolean} [gestureSettingsMouse.dblClickToZoom=false] - Zoom on double-click gesture. Note: If set to true\n  *     then clickToZoom should be set to false to prevent multiple zooms.\n  * @property {Boolean} [gestureSettingsMouse.pinchToZoom=false] - Zoom on pinch gesture\n  * @property {Boolean} [gestureSettingsMouse.zoomToRefPoint=true] - If zoomToRefPoint is true, the zoom is centered at the pointer position. Otherwise,\n  *     the zoom is centered at the canvas center.\n  * @property {Boolean} [gestureSettingsMouse.flickEnabled=false] - Enable flick gesture\n  * @property {Number} [gestureSettingsMouse.flickMinSpeed=120] - If flickEnabled is true, the minimum speed to initiate a flick gesture (pixels-per-second)\n  * @property {Number} [gestureSettingsMouse.flickMomentum=0.25] - If flickEnabled is true, the momentum factor for the flick gesture\n  * @property {Boolean} [gestureSettingsMouse.pinchRotate=false] - If pinchRotate is true, the user will have the ability to rotate the image using their fingers.\n  *\n  * @property {OpenSeadragon.GestureSettings} [gestureSettingsTouch]\n  *     Settings for gestures generated by a touch pointer device. (See {@link OpenSeadragon.GestureSettings})\n  * @property {Boolean} [gestureSettingsTouch.dragToPan=true] - Pan on drag gesture\n  * @property {Boolean} [gestureSettingsTouch.scrollToZoom=false] - Zoom on scroll gesture\n  * @property {Boolean} [gestureSettingsTouch.clickToZoom=false] - Zoom on click gesture\n  * @property {Boolean} [gestureSettingsTouch.dblClickToZoom=true] - Zoom on double-click gesture. Note: If set to true\n  *     then clickToZoom should be set to false to prevent multiple zooms.\n  * @property {Boolean} [gestureSettingsTouch.pinchToZoom=true] - Zoom on pinch gesture\n  * @property {Boolean} [gestureSettingsTouch.zoomToRefPoint=true] - If zoomToRefPoint is true, the zoom is centered at the pointer position. Otherwise,\n  *     the zoom is centered at the canvas center.\n  * @property {Boolean} [gestureSettingsTouch.flickEnabled=true] - Enable flick gesture\n  * @property {Number} [gestureSettingsTouch.flickMinSpeed=120] - If flickEnabled is true, the minimum speed to initiate a flick gesture (pixels-per-second)\n  * @property {Number} [gestureSettingsTouch.flickMomentum=0.25] - If flickEnabled is true, the momentum factor for the flick gesture\n  * @property {Boolean} [gestureSettingsTouch.pinchRotate=false] - If pinchRotate is true, the user will have the ability to rotate the image using their fingers.\n  *\n  * @property {OpenSeadragon.GestureSettings} [gestureSettingsPen]\n  *     Settings for gestures generated by a pen pointer device. (See {@link OpenSeadragon.GestureSettings})\n  * @property {Boolean} [gestureSettingsPen.dragToPan=true] - Pan on drag gesture\n  * @property {Boolean} [gestureSettingsPen.scrollToZoom=false] - Zoom on scroll gesture\n  * @property {Boolean} [gestureSettingsPen.clickToZoom=true] - Zoom on click gesture\n  * @property {Boolean} [gestureSettingsPen.dblClickToZoom=false] - Zoom on double-click gesture. Note: If set to true\n  *     then clickToZoom should be set to false to prevent multiple zooms.\n  * @property {Boolean} [gestureSettingsPen.pinchToZoom=false] - Zoom on pinch gesture\n  * @property {Boolean} [gestureSettingsPen.zoomToRefPoint=true] - If zoomToRefPoint is true, the zoom is centered at the pointer position. Otherwise,\n  *     the zoom is centered at the canvas center.\n  * @property {Boolean} [gestureSettingsPen.flickEnabled=false] - Enable flick gesture\n  * @property {Number} [gestureSettingsPen.flickMinSpeed=120] - If flickEnabled is true, the minimum speed to initiate a flick gesture (pixels-per-second)\n  * @property {Number} [gestureSettingsPen.flickMomentum=0.25] - If flickEnabled is true, the momentum factor for the flick gesture\n  * @property {Boolean} [gestureSettingsPen.pinchRotate=false] - If pinchRotate is true, the user will have the ability to rotate the image using their fingers.\n  *\n  * @property {OpenSeadragon.GestureSettings} [gestureSettingsUnknown]\n  *     Settings for gestures generated by unknown pointer devices. (See {@link OpenSeadragon.GestureSettings})\n  * @property {Boolean} [gestureSettingsUnknown.dragToPan=true] - Pan on drag gesture\n  * @property {Boolean} [gestureSettingsUnknown.scrollToZoom=true] - Zoom on scroll gesture\n  * @property {Boolean} [gestureSettingsUnknown.clickToZoom=false] - Zoom on click gesture\n  * @property {Boolean} [gestureSettingsUnknown.dblClickToZoom=true] - Zoom on double-click gesture. Note: If set to true\n  *     then clickToZoom should be set to false to prevent multiple zooms.\n  * @property {Boolean} [gestureSettingsUnknown.pinchToZoom=true] - Zoom on pinch gesture\n  * @property {Boolean} [gestureSettingsUnknown.zoomToRefPoint=true] - If zoomToRefPoint is true, the zoom is centered at the pointer position. Otherwise,\n  *     the zoom is centered at the canvas center.\n  * @property {Boolean} [gestureSettingsUnknown.flickEnabled=true] - Enable flick gesture\n  * @property {Number} [gestureSettingsUnknown.flickMinSpeed=120] - If flickEnabled is true, the minimum speed to initiate a flick gesture (pixels-per-second)\n  * @property {Number} [gestureSettingsUnknown.flickMomentum=0.25] - If flickEnabled is true, the momentum factor for the flick gesture\n  * @property {Boolean} [gestureSettingsUnknown.pinchRotate=false] - If pinchRotate is true, the user will have the ability to rotate the image using their fingers.\n  *\n  * @property {Number} [zoomPerClick=2.0]\n  *     The \"zoom distance\" per mouse click or touch tap. <em><strong>Note:</strong> Setting this to 1.0 effectively disables the click-to-zoom feature (also see gestureSettings[Mouse|Touch|Pen].clickToZoom/dblClickToZoom).</em>\n  *\n  * @property {Number} [zoomPerScroll=1.2]\n  *     The \"zoom distance\" per mouse scroll or touch pinch. <em><strong>Note:</strong> Setting this to 1.0 effectively disables the mouse-wheel zoom feature (also see gestureSettings[Mouse|Touch|Pen].scrollToZoom}).</em>\n  *\n  * @property {Number} [zoomPerSecond=1.0]\n  *     Sets the zoom amount per second when zoomIn/zoomOut buttons are pressed and held.\n  *     The value is a factor of the current zoom, so 1.0 (the default) disables zooming when the zoomIn/zoomOut buttons\n  *     are held. Higher values will increase the rate of zoom when the zoomIn/zoomOut buttons are held. Note that values\n  *     < 1.0 will reverse the operation of the zoomIn/zoomOut buttons (zoomIn button will decrease the zoom, zoomOut will\n  *     increase the zoom).\n  *\n  * @property {Boolean} [showNavigator=false]\n  *     Set to true to make the navigator minimap appear.\n  *\n  * @property {String} [navigatorId=navigator-GENERATED DATE]\n  *     The ID of a div to hold the navigator minimap.\n  *     If an ID is specified, the navigatorPosition, navigatorSizeRatio, navigatorMaintainSizeRatio, navigator[Top|Left|Height|Width] and navigatorAutoFade options will be ignored.\n  *     If an ID is not specified, a div element will be generated and placed on top of the main image.\n  *\n  * @property {String} [navigatorPosition='TOP_RIGHT']\n  *     Valid values are 'TOP_LEFT', 'TOP_RIGHT', 'BOTTOM_LEFT', 'BOTTOM_RIGHT', or 'ABSOLUTE'.<br>\n  *     If 'ABSOLUTE' is specified, then navigator[Top|Left|Height|Width] determines the size and position of the navigator minimap in the viewer, and navigatorSizeRatio and navigatorMaintainSizeRatio are ignored.<br>\n  *     For 'TOP_LEFT', 'TOP_RIGHT', 'BOTTOM_LEFT', and 'BOTTOM_RIGHT', the navigatorSizeRatio or navigator[Height|Width] values determine the size of the navigator minimap.\n  *\n  * @property {Number} [navigatorSizeRatio=0.2]\n  *     Ratio of navigator size to viewer size. Ignored if navigator[Height|Width] are specified.\n  *\n  * @property {Boolean} [navigatorMaintainSizeRatio=false]\n  *     If true, the navigator minimap is resized (using navigatorSizeRatio) when the viewer size changes.\n  *\n  * @property {Number|String} [navigatorTop=null]\n  *     Specifies the location of the navigator minimap (see navigatorPosition).\n  *\n  * @property {Number|String} [navigatorLeft=null]\n  *     Specifies the location of the navigator minimap (see navigatorPosition).\n  *\n  * @property {Number|String} [navigatorHeight=null]\n  *     Specifies the size of the navigator minimap (see navigatorPosition).\n  *     If specified, navigatorSizeRatio and navigatorMaintainSizeRatio are ignored.\n  *\n  * @property {Number|String} [navigatorWidth=null]\n  *     Specifies the size of the navigator minimap (see navigatorPosition).\n  *     If specified, navigatorSizeRatio and navigatorMaintainSizeRatio are ignored.\n  *\n  * @property {Boolean} [navigatorAutoResize=true]\n  *     Set to false to prevent polling for navigator size changes. Useful for providing custom resize behavior.\n  *     Setting to false can also improve performance when the navigator is configured to a fixed size.\n  *\n  * @property {Boolean} [navigatorAutoFade=true]\n  *     If the user stops interacting with the viewport, fade the navigator minimap.\n  *     Setting to false will make the navigator minimap always visible.\n  *\n  * @property {Boolean} [navigatorRotate=true]\n  *     If true, the navigator will be rotated together with the viewer.\n  *\n  * @property {String} [navigatorBackground='#000']\n  *     Specifies the background color of the navigator minimap\n  *\n  * @property {Number} [navigatorOpacity=0.8]\n  *     Specifies the opacity of the navigator minimap.\n  *\n  * @property {String} [navigatorBorderColor='#555']\n  *     Specifies the border color of the navigator minimap\n  *\n  * @property {String} [navigatorDisplayRegionColor='#900']\n  *     Specifies the border color of the display region rectangle of the navigator minimap\n  *\n  * @property {Number} [controlsFadeDelay=2000]\n  *     The number of milliseconds to wait once the user has stopped interacting\n  *     with the interface before beginning to fade the controls. Assumes\n  *     showNavigationControl and autoHideControls are both true.\n  *\n  * @property {Number} [controlsFadeLength=1500]\n  *     The number of milliseconds to animate the controls fading out.\n  *\n  * @property {Number} [maxImageCacheCount=200]\n  *     The max number of images we should keep in memory (per drawer).\n  *\n  * @property {Number} [timeout=30000]\n  *     The max number of milliseconds that an image job may take to complete.\n  *\n  * @property {Boolean} [useCanvas=true]\n  *     Set to false to not use an HTML canvas element for image rendering even if canvas is supported.\n  *\n  * @property {Number} [minPixelRatio=0.5]\n  *     The higher the minPixelRatio, the lower the quality of the image that\n  *     is considered sufficient to stop rendering a given zoom level.  For\n  *     example, if you are targeting mobile devices with less bandwidth you may\n  *     try setting this to 1.5 or higher.\n  *\n  * @property {Boolean} [mouseNavEnabled=true]\n  *     Is the user able to interact with the image via mouse or touch. Default\n  *     interactions include draging the image in a plane, and zooming in toward\n  *     and away from the image.\n  *\n  * @property {Boolean} [showNavigationControl=true]\n  *     Set to false to prevent the appearance of the default navigation controls.<br>\n  *     Note that if set to false, the customs buttons set by the options\n  *     zoomInButton, zoomOutButton etc, are rendered inactive.\n  *\n  * @property {OpenSeadragon.ControlAnchor} [navigationControlAnchor=TOP_LEFT]\n  *     Placement of the default navigation controls.\n  *     To set the placement of the sequence controls, see the\n  *     sequenceControlAnchor option.\n  *\n  * @property {Boolean} [showZoomControl=true]\n  *     If true then + and - buttons to zoom in and out are displayed.<br>\n  *     Note: {@link OpenSeadragon.Options.showNavigationControl} is overriding\n  *     this setting when set to false.\n  *\n  * @property {Boolean} [showHomeControl=true]\n  *     If true then the 'Go home' button is displayed to go back to the original\n  *     zoom and pan.<br>\n  *     Note: {@link OpenSeadragon.Options.showNavigationControl} is overriding\n  *     this setting when set to false.\n  *\n  * @property {Boolean} [showFullPageControl=true]\n  *     If true then the 'Toggle full page' button is displayed to switch\n  *     between full page and normal mode.<br>\n  *     Note: {@link OpenSeadragon.Options.showNavigationControl} is overriding\n  *     this setting when set to false.\n  *\n  * @property {Boolean} [showRotationControl=false]\n  *     If true then the rotate left/right controls will be displayed as part of the\n  *     standard controls. This is also subject to the browser support for rotate\n  *     (e.g. viewer.drawer.canRotate()).<br>\n  *     Note: {@link OpenSeadragon.Options.showNavigationControl} is overriding\n  *     this setting when set to false.\n  *\n  * @property {Boolean} [showFlipControl=false]\n  *     If true then the flip controls will be displayed as part of the\n  *     standard controls.\n  *\n  * @property {Boolean} [showSequenceControl=true]\n  *     If sequenceMode is true, then provide buttons for navigating forward and\n  *     backward through the images.\n  *\n  * @property {OpenSeadragon.ControlAnchor} [sequenceControlAnchor=TOP_LEFT]\n  *     Placement of the default sequence controls.\n  *\n  * @property {Boolean} [navPrevNextWrap=false]\n  *     If true then the 'previous' button will wrap to the last image when\n  *     viewing the first image and the 'next' button will wrap to the first\n  *     image when viewing the last image.\n  *\n  * @property {String} zoomInButton\n  *     Set the id of the custom 'Zoom in' button to use.\n  *     This is useful to have a custom button anywhere in the web page.<br>\n  *     To only change the button images, consider using\n  *     {@link OpenSeadragon.Options.navImages}\n  *\n  * @property {String} zoomOutButton\n  *     Set the id of the custom 'Zoom out' button to use.\n  *     This is useful to have a custom button anywhere in the web page.<br>\n  *     To only change the button images, consider using\n  *     {@link OpenSeadragon.Options.navImages}\n  *\n  * @property {String} homeButton\n  *     Set the id of the custom 'Go home' button to use.\n  *     This is useful to have a custom button anywhere in the web page.<br>\n  *     To only change the button images, consider using\n  *     {@link OpenSeadragon.Options.navImages}\n  *\n  * @property {String} fullPageButton\n  *     Set the id of the custom 'Toggle full page' button to use.\n  *     This is useful to have a custom button anywhere in the web page.<br>\n  *     To only change the button images, consider using\n  *     {@link OpenSeadragon.Options.navImages}\n  *\n  * @property {String} rotateLeftButton\n  *     Set the id of the custom 'Rotate left' button to use.\n  *     This is useful to have a custom button anywhere in the web page.<br>\n  *     To only change the button images, consider using\n  *     {@link OpenSeadragon.Options.navImages}\n  *\n  * @property {String} rotateRightButton\n  *     Set the id of the custom 'Rotate right' button to use.\n  *     This is useful to have a custom button anywhere in the web page.<br>\n  *     To only change the button images, consider using\n  *     {@link OpenSeadragon.Options.navImages}\n  *\n  * @property {String} previousButton\n  *     Set the id of the custom 'Previous page' button to use.\n  *     This is useful to have a custom button anywhere in the web page.<br>\n  *     To only change the button images, consider using\n  *     {@link OpenSeadragon.Options.navImages}\n  *\n  * @property {String} nextButton\n  *     Set the id of the custom 'Next page' button to use.\n  *     This is useful to have a custom button anywhere in the web page.<br>\n  *     To only change the button images, consider using\n  *     {@link OpenSeadragon.Options.navImages}\n  *\n  * @property {Boolean} [sequenceMode=false]\n  *     Set to true to have the viewer treat your tilesources as a sequence of images to\n  *     be opened one at a time rather than all at once.\n  *\n  * @property {Number} [initialPage=0]\n  *     If sequenceMode is true, display this page initially.\n  *\n  * @property {Boolean} [preserveViewport=false]\n  *     If sequenceMode is true, then normally navigating through each image resets the\n  *     viewport to 'home' position.  If preserveViewport is set to true, then the viewport\n  *     position is preserved when navigating between images in the sequence.\n  *\n  * @property {Boolean} [preserveOverlays=false]\n  *     If sequenceMode is true, then normally navigating through each image\n  *     resets the overlays.\n  *     If preserveOverlays is set to true, then the overlays added with {@link OpenSeadragon.Viewer#addOverlay}\n  *     are preserved when navigating between images in the sequence.\n  *     Note: setting preserveOverlays overrides any overlays specified in the global\n  *     \"overlays\" option for the Viewer. It's also not compatible with specifying\n  *     per-tileSource overlays via the options, as those overlays will persist\n  *     even after the tileSource is closed.\n  *\n  * @property {Boolean} [showReferenceStrip=false]\n  *     If sequenceMode is true, then display a scrolling strip of image thumbnails for\n  *     navigating through the images.\n  *\n  * @property {String} [referenceStripScroll='horizontal']\n  *\n  * @property {Element} [referenceStripElement=null]\n  *\n  * @property {Number} [referenceStripHeight=null]\n  *\n  * @property {Number} [referenceStripWidth=null]\n  *\n  * @property {String} [referenceStripPosition='BOTTOM_LEFT']\n  *\n  * @property {Number} [referenceStripSizeRatio=0.2]\n  *\n  * @property {Boolean} [collectionMode=false]\n  *     Set to true to have the viewer arrange your TiledImages in a grid or line.\n  *\n  * @property {Number} [collectionRows=3]\n  *     If collectionMode is true, specifies how many rows the grid should have. Use 1 to make a line.\n  *     If collectionLayout is 'vertical', specifies how many columns instead.\n  *\n  * @property {Number} [collectionColumns=0]\n  *     If collectionMode is true, specifies how many columns the grid should have. Use 1 to make a line.\n  *     If collectionLayout is 'vertical', specifies how many rows instead. Ignored if collectionRows is not set to a falsy value.\n  *\n  * @property {String} [collectionLayout='horizontal']\n  *     If collectionMode is true, specifies whether to arrange vertically or horizontally.\n  *\n  * @property {Number} [collectionTileSize=800]\n  *     If collectionMode is true, specifies the size, in viewport coordinates, for each TiledImage to fit into.\n  *     The TiledImage will be centered within a square of the specified size.\n  *\n  * @property {Number} [collectionTileMargin=80]\n  *     If collectionMode is true, specifies the margin, in viewport coordinates, between each TiledImage.\n  *\n  * @property {String|Boolean} [crossOriginPolicy=false]\n  *     Valid values are 'Anonymous', 'use-credentials', and false. If false, canvas requests will\n  *     not use CORS, and the canvas will be tainted.\n  *\n  * @property {Boolean} [ajaxWithCredentials=false]\n  *     Whether to set the withCredentials XHR flag for AJAX requests.\n  *     Note that this can be overridden at the {@link OpenSeadragon.TileSource} level.\n  *\n  * @property {Boolean} [loadTilesWithAjax=false]\n  *     Whether to load tile data using AJAX requests.\n  *     Note that this can be overridden at the {@link OpenSeadragon.TileSource} level.\n  *\n  * @property {Object} [ajaxHeaders={}]\n  *     A set of headers to include when making AJAX requests for tile sources or tiles.\n  *\n  * @property {Boolean} [splitHashDataForPost=false]\n  *     Allows to treat _first_ hash ('#') symbol as a separator for POST data:\n  *     URL to be opened by a {@link OpenSeadragon.TileSource} can thus look like: http://some.url#postdata=here.\n  *     The whole URL is used to fetch image info metadata and it is then split to 'http://some.url' and\n  *     'postdata=here'; post data is given to the {@link OpenSeadragon.TileSource} of the choice and can be further\n  *     used within tile requests (see TileSource methods).\n  *     NOTE: {@link OpenSeadragon.TileSource.prototype.configure} return value should contain the post data\n  *     if you want to use it later - so that it is given to your constructor later.\n  *     NOTE: usually, post data is expected to be ampersand-separated (just like GET parameters), and is NOT USED\n  *     to fetch tile image data unless explicitly programmed, or if loadTilesWithAjax=false 4\n  *     (but it is still used for the initial image info request).\n  *     NOTE: passing POST data from URL by this feature only supports string values, however,\n  *     TileSource can send any data using POST as long as the header is correct\n  *     (@see OpenSeadragon.TileSource.prototype.getTilePostData)\n  */\n\n /**\n  * Settings for gestures generated by a pointer device.\n  *\n  * @typedef {Object} GestureSettings\n  * @memberof OpenSeadragon\n  *\n  * @property {Boolean} dragToPan\n  *     Set to false to disable panning on drag gestures.\n  *\n  * @property {Boolean} scrollToZoom\n  *     Set to false to disable zooming on scroll gestures.\n  *\n  * @property {Boolean} clickToZoom\n  *     Set to false to disable zooming on click gestures.\n  *\n  * @property {Boolean} dblClickToZoom\n  *     Set to false to disable zooming on double-click gestures. Note: If set to true\n  *     then clickToZoom should be set to false to prevent multiple zooms.\n  *\n  * @property {Boolean} pinchToZoom\n  *     Set to false to disable zooming on pinch gestures.\n  *\n  * @property {Boolean} flickEnabled\n  *     Set to false to disable the kinetic panning effect (flick) at the end of a drag gesture.\n  *\n  * @property {Number} flickMinSpeed\n  *     If flickEnabled is true, the minimum speed (in pixels-per-second) required to cause the kinetic panning effect (flick) at the end of a drag gesture.\n  *\n  * @property {Number} flickMomentum\n  *     If flickEnabled is true, a constant multiplied by the velocity to determine the distance of the kinetic panning effect (flick) at the end of a drag gesture.\n  *     A larger value will make the flick feel \"lighter\", while a smaller value will make the flick feel \"heavier\".\n  *     Note: springStiffness and animationTime also affect the \"spring\" used to stop the flick animation.\n  *\n  */\n\n/**\n  * The names for the image resources used for the image navigation buttons.\n  *\n  * @typedef {Object} NavImages\n  * @memberof OpenSeadragon\n  *\n  * @property {Object} zoomIn - Images for the zoom-in button.\n  * @property {String} zoomIn.REST\n  * @property {String} zoomIn.GROUP\n  * @property {String} zoomIn.HOVER\n  * @property {String} zoomIn.DOWN\n  *\n  * @property {Object} zoomOut - Images for the zoom-out button.\n  * @property {String} zoomOut.REST\n  * @property {String} zoomOut.GROUP\n  * @property {String} zoomOut.HOVER\n  * @property {String} zoomOut.DOWN\n  *\n  * @property {Object} home - Images for the home button.\n  * @property {String} home.REST\n  * @property {String} home.GROUP\n  * @property {String} home.HOVER\n  * @property {String} home.DOWN\n  *\n  * @property {Object} fullpage - Images for the full-page button.\n  * @property {String} fullpage.REST\n  * @property {String} fullpage.GROUP\n  * @property {String} fullpage.HOVER\n  * @property {String} fullpage.DOWN\n  *\n  * @property {Object} rotateleft - Images for the rotate left button.\n  * @property {String} rotateleft.REST\n  * @property {String} rotateleft.GROUP\n  * @property {String} rotateleft.HOVER\n  * @property {String} rotateleft.DOWN\n  *\n  * @property {Object} rotateright - Images for the rotate right button.\n  * @property {String} rotateright.REST\n  * @property {String} rotateright.GROUP\n  * @property {String} rotateright.HOVER\n  * @property {String} rotateright.DOWN\n  *\n  * @property {Object} flip - Images for the flip button.\n  * @property {String} flip.REST\n  * @property {String} flip.GROUP\n  * @property {String} flip.HOVER\n  * @property {String} flip.DOWN\n  *\n  * @property {Object} previous - Images for the previous button.\n  * @property {String} previous.REST\n  * @property {String} previous.GROUP\n  * @property {String} previous.HOVER\n  * @property {String} previous.DOWN\n  *\n  * @property {Object} next - Images for the next button.\n  * @property {String} next.REST\n  * @property {String} next.GROUP\n  * @property {String} next.HOVER\n  * @property {String} next.DOWN\n  *\n  */\n\n/* eslint-disable no-redeclare */\nfunction OpenSeadragon( options ){\n    return new OpenSeadragon.Viewer( options );\n}\n\n(function( $ ){\n\n\n    /**\n     * The OpenSeadragon version.\n     *\n     * @member {Object} OpenSeadragon.version\n     * @property {String} versionStr - The version number as a string ('major.minor.revision').\n     * @property {Number} major - The major version number.\n     * @property {Number} minor - The minor version number.\n     * @property {Number} revision - The revision number.\n     * @since 1.0.0\n     */\n    $.version = {\n        versionStr: '3.1.0',\n        major: parseInt('3', 10),\n        minor: parseInt('1', 10),\n        revision: parseInt('0', 10)\n    };\n\n\n    /**\n     * Taken from jquery 1.6.1\n     * [[Class]] -> type pairs\n     * @private\n     */\n    var class2type = {\n            '[object Boolean]':     'boolean',\n            '[object Number]':      'number',\n            '[object String]':      'string',\n            '[object Function]':    'function',\n            '[object Array]':       'array',\n            '[object Date]':        'date',\n            '[object RegExp]':      'regexp',\n            '[object Object]':      'object'\n        },\n        // Save a reference to some core methods\n        toString    = Object.prototype.toString,\n        hasOwn      = Object.prototype.hasOwnProperty;\n\n    /**\n     * Taken from jQuery 1.6.1\n     * @function isFunction\n     * @memberof OpenSeadragon\n     * @see {@link http://www.jquery.com/ jQuery}\n     */\n    $.isFunction = function( obj ) {\n        return $.type(obj) === \"function\";\n    };\n\n\n    /**\n     * Taken from jQuery 1.6.1\n     * @function isArray\n     * @memberof OpenSeadragon\n     * @see {@link http://www.jquery.com/ jQuery}\n     */\n    $.isArray = Array.isArray || function( obj ) {\n        return $.type(obj) === \"array\";\n    };\n\n\n    /**\n     * A crude way of determining if an object is a window.\n     * Taken from jQuery 1.6.1\n     * @function isWindow\n     * @memberof OpenSeadragon\n     * @see {@link http://www.jquery.com/ jQuery}\n     */\n    $.isWindow = function( obj ) {\n        return obj && typeof obj === \"object\" && \"setInterval\" in obj;\n    };\n\n\n    /**\n     * Taken from jQuery 1.6.1\n     * @function type\n     * @memberof OpenSeadragon\n     * @see {@link http://www.jquery.com/ jQuery}\n     */\n    $.type = function( obj ) {\n        return ( obj === null ) || ( obj === undefined ) ?\n            String( obj ) :\n            class2type[ toString.call(obj) ] || \"object\";\n    };\n\n\n    /**\n     * Taken from jQuery 1.6.1\n     * @function isPlainObject\n     * @memberof OpenSeadragon\n     * @see {@link http://www.jquery.com/ jQuery}\n     */\n    $.isPlainObject = function( obj ) {\n        // Must be an Object.\n        // Because of IE, we also have to check the presence of the constructor property.\n        // Make sure that DOM nodes and window objects don't pass through, as well\n        if ( !obj || OpenSeadragon.type(obj) !== \"object\" || obj.nodeType || $.isWindow( obj ) ) {\n            return false;\n        }\n\n        // Not own constructor property must be Object\n        if ( obj.constructor &&\n            !hasOwn.call(obj, \"constructor\") &&\n            !hasOwn.call(obj.constructor.prototype, \"isPrototypeOf\") ) {\n            return false;\n        }\n\n        // Own properties are enumerated firstly, so to speed up,\n        // if last one is own, then all properties are own.\n\n        var lastKey;\n        for (var key in obj ) {\n            lastKey = key;\n        }\n\n        return lastKey === undefined || hasOwn.call( obj, lastKey );\n    };\n\n\n    /**\n     * Taken from jQuery 1.6.1\n     * @function isEmptyObject\n     * @memberof OpenSeadragon\n     * @see {@link http://www.jquery.com/ jQuery}\n     */\n    $.isEmptyObject = function( obj ) {\n        for ( var name in obj ) {\n            return false;\n        }\n        return true;\n    };\n\n    /**\n     * Shim around Object.freeze. Does nothing if Object.freeze is not supported.\n     * @param {Object} obj The object to freeze.\n     * @return {Object} obj The frozen object.\n     */\n    $.freezeObject = function(obj) {\n        if (Object.freeze) {\n            $.freezeObject = Object.freeze;\n        } else {\n            $.freezeObject = function(obj) {\n                return obj;\n            };\n        }\n        return $.freezeObject(obj);\n    };\n\n    /**\n     * True if the browser supports the HTML5 canvas element\n     * @member {Boolean} supportsCanvas\n     * @memberof OpenSeadragon\n     */\n    $.supportsCanvas = (function () {\n        var canvasElement = document.createElement( 'canvas' );\n        return !!( $.isFunction( canvasElement.getContext ) &&\n                    canvasElement.getContext( '2d' ) );\n    }());\n\n    /**\n     * Test whether the submitted canvas is tainted or not.\n     * @argument {Canvas} canvas The canvas to test.\n     * @returns {Boolean} True if the canvas is tainted.\n     */\n    $.isCanvasTainted = function(canvas) {\n        var isTainted = false;\n        try {\n            // We test if the canvas is tainted by retrieving data from it.\n            // An exception will be raised if the canvas is tainted.\n            canvas.getContext('2d').getImageData(0, 0, 1, 1);\n        } catch (e) {\n            isTainted = true;\n        }\n        return isTainted;\n    };\n\n    /**\n     * True if the browser supports the EventTarget.addEventListener() method\n     * @member {Boolean} supportsAddEventListener\n     * @memberof OpenSeadragon\n     */\n    $.supportsAddEventListener = (function () {\n        return !!(document.documentElement.addEventListener && document.addEventListener);\n    }());\n\n    /**\n     * True if the browser supports the EventTarget.removeEventListener() method\n     * @member {Boolean} supportsRemoveEventListener\n     * @memberof OpenSeadragon\n     */\n    $.supportsRemoveEventListener = (function () {\n        return !!(document.documentElement.removeEventListener && document.removeEventListener);\n    }());\n\n    /**\n     * True if the browser supports the newer EventTarget.addEventListener options argument\n     * @member {Boolean} supportsEventListenerOptions\n     * @memberof OpenSeadragon\n     */\n    $.supportsEventListenerOptions = (function () {\n        var supported = 0;\n\n        if ( $.supportsAddEventListener ) {\n            try {\n                var options = {\n                    get capture() {\n                        supported++;\n                        return false;\n                    },\n                    get once() {\n                        supported++;\n                        return false;\n                    },\n                    get passive() {\n                        supported++;\n                        return false;\n                    }\n                };\n                window.addEventListener(\"test\", null, options);\n                window.removeEventListener(\"test\", null, options);\n            } catch ( e ) {\n                supported = 0;\n            }\n        }\n\n        return supported >= 3;\n    }());\n\n    /**\n     * A ratio comparing the device screen's pixel density to the canvas's backing store pixel density,\n     * clamped to a minimum of 1. Defaults to 1 if canvas isn't supported by the browser.\n     * @member {Number} pixelDensityRatio\n     * @memberof OpenSeadragon\n     */\n    $.getCurrentPixelDensityRatio = function() {\n        if ( $.supportsCanvas ) {\n            var context = document.createElement('canvas').getContext('2d');\n            var devicePixelRatio = window.devicePixelRatio || 1;\n            var backingStoreRatio = context.webkitBackingStorePixelRatio ||\n                                    context.mozBackingStorePixelRatio ||\n                                    context.msBackingStorePixelRatio ||\n                                    context.oBackingStorePixelRatio ||\n                                    context.backingStorePixelRatio || 1;\n            return Math.max(devicePixelRatio, 1) / backingStoreRatio;\n        } else {\n            return 1;\n        }\n    };\n\n    /**\n     * @member {Number} pixelDensityRatio\n     * @memberof OpenSeadragon\n     */\n    $.pixelDensityRatio = $.getCurrentPixelDensityRatio();\n\n}( OpenSeadragon ));\n\n/**\n *  This closure defines all static methods available to the OpenSeadragon\n *  namespace.  Many, if not most, are taken directly from jQuery for use\n *  to simplify and reduce common programming patterns.  More static methods\n *  from jQuery may eventually make their way into this though we are\n *  attempting to avoid an explicit dependency on jQuery only because\n *  OpenSeadragon is a broadly useful code base and would be made less broad\n *  by requiring jQuery fully.\n *\n *  Some static methods have also been refactored from the original OpenSeadragon\n *  project.\n */\n(function( $ ){\n\n    /**\n     * Taken from jQuery 1.6.1\n     * @function extend\n     * @memberof OpenSeadragon\n     * @see {@link http://www.jquery.com/ jQuery}\n     */\n    $.extend = function() {\n        var options,\n            name,\n            src,\n            copy,\n            copyIsArray,\n            clone,\n            target  = arguments[ 0 ] || {},\n            length  = arguments.length,\n            deep    = false,\n            i       = 1;\n\n        // Handle a deep copy situation\n        if ( typeof target === \"boolean\" ) {\n            deep    = target;\n            target  = arguments[ 1 ] || {};\n            // skip the boolean and the target\n            i = 2;\n        }\n\n        // Handle case when target is a string or something (possible in deep copy)\n        if ( typeof target !== \"object\" && !OpenSeadragon.isFunction( target ) ) {\n            target = {};\n        }\n\n        // extend jQuery itself if only one argument is passed\n        if ( length === i ) {\n            target = this;\n            --i;\n        }\n\n        for ( ; i < length; i++ ) {\n            // Only deal with non-null/undefined values\n            options = arguments[ i ];\n            if ( options !== null || options !== undefined ) {\n                // Extend the base object\n                for ( name in options ) {\n                    src = target[ name ];\n                    copy = options[ name ];\n\n                    // Prevent never-ending loop\n                    if ( target === copy ) {\n                        continue;\n                    }\n\n                    // Recurse if we're merging plain objects or arrays\n                    if ( deep && copy && ( OpenSeadragon.isPlainObject( copy ) || ( copyIsArray = OpenSeadragon.isArray( copy ) ) ) ) {\n                        if ( copyIsArray ) {\n                            copyIsArray = false;\n                            clone = src && OpenSeadragon.isArray( src ) ? src : [];\n\n                        } else {\n                            clone = src && OpenSeadragon.isPlainObject( src ) ? src : {};\n                        }\n\n                        // Never move original objects, clone them\n                        target[ name ] = OpenSeadragon.extend( deep, clone, copy );\n\n                    // Don't bring in undefined values\n                    } else if ( copy !== undefined ) {\n                        target[ name ] = copy;\n                    }\n                }\n            }\n        }\n\n        // Return the modified object\n        return target;\n    };\n\n    var isIOSDevice = function () {\n        if (typeof navigator !== 'object') {\n            return false;\n        }\n        var userAgent = navigator.userAgent;\n        if (typeof userAgent !== 'string') {\n            return false;\n        }\n        return userAgent.indexOf('iPhone') !== -1 ||\n               userAgent.indexOf('iPad') !== -1 ||\n               userAgent.indexOf('iPod') !== -1;\n    };\n\n    $.extend( $, /** @lends OpenSeadragon */{\n        /**\n         * The default values for the optional settings documented at {@link OpenSeadragon.Options}.\n         * @static\n         * @type {Object}\n         */\n        DEFAULT_SETTINGS: {\n            //DATA SOURCE DETAILS\n            xmlPath:                null,\n            tileSources:            null,\n            tileHost:               null,\n            initialPage:            0,\n            crossOriginPolicy:      false,\n            ajaxWithCredentials:    false,\n            loadTilesWithAjax:      false,\n            ajaxHeaders:            {},\n            splitHashDataForPost:   false,\n\n            //PAN AND ZOOM SETTINGS AND CONSTRAINTS\n            panHorizontal:          true,\n            panVertical:            true,\n            constrainDuringPan:     false,\n            wrapHorizontal:         false,\n            wrapVertical:           false,\n            visibilityRatio:        0.5, //-> how much of the viewer can be negative space\n            minPixelRatio:          0.5, //->closer to 0 draws tiles meant for a higher zoom at this zoom\n            defaultZoomLevel:       0,\n            minZoomLevel:           null,\n            maxZoomLevel:           null,\n            homeFillsViewer:        false,\n\n            //UI RESPONSIVENESS AND FEEL\n            clickTimeThreshold:     300,\n            clickDistThreshold:     5,\n            dblClickTimeThreshold:  300,\n            dblClickDistThreshold:  20,\n            springStiffness:        6.5,\n            animationTime:          1.2,\n            gestureSettingsMouse:   {\n                dragToPan: true,\n                scrollToZoom: true,\n                clickToZoom: true,\n                dblClickToZoom: false,\n                pinchToZoom: false,\n                zoomToRefPoint: true,\n                flickEnabled: false,\n                flickMinSpeed: 120,\n                flickMomentum: 0.25,\n                pinchRotate: false\n            },\n            gestureSettingsTouch:   {\n                dragToPan: true,\n                scrollToZoom: false,\n                clickToZoom: false,\n                dblClickToZoom: true,\n                pinchToZoom: true,\n                zoomToRefPoint: true,\n                flickEnabled: true,\n                flickMinSpeed: 120,\n                flickMomentum: 0.25,\n                pinchRotate: false\n            },\n            gestureSettingsPen:     {\n                dragToPan: true,\n                scrollToZoom: false,\n                clickToZoom: true,\n                dblClickToZoom: false,\n                pinchToZoom: false,\n                zoomToRefPoint: true,\n                flickEnabled: false,\n                flickMinSpeed: 120,\n                flickMomentum: 0.25,\n                pinchRotate: false\n            },\n            gestureSettingsUnknown: {\n                dragToPan: true,\n                scrollToZoom: false,\n                clickToZoom: false,\n                dblClickToZoom: true,\n                pinchToZoom: true,\n                zoomToRefPoint: true,\n                flickEnabled: true,\n                flickMinSpeed: 120,\n                flickMomentum: 0.25,\n                pinchRotate: false\n            },\n            zoomPerClick:           2,\n            zoomPerScroll:          1.2,\n            zoomPerSecond:          1.0,\n            blendTime:              0,\n            alwaysBlend:            false,\n            autoHideControls:       true,\n            immediateRender:        false,\n            minZoomImageRatio:      0.9, //-> closer to 0 allows zoom out to infinity\n            maxZoomPixelRatio:      1.1, //-> higher allows 'over zoom' into pixels\n            smoothTileEdgesMinZoom: 1.1, //-> higher than maxZoomPixelRatio disables it\n            iOSDevice:              isIOSDevice(),\n            pixelsPerWheelLine:     40,\n            pixelsPerArrowPress:    40,\n            autoResize:             true,\n            preserveImageSizeOnResize: false, // requires autoResize=true\n            minScrollDeltaTime:     50,\n            rotationIncrement:      90,\n\n            //DEFAULT CONTROL SETTINGS\n            showSequenceControl:     true,  //SEQUENCE\n            sequenceControlAnchor:   null,  //SEQUENCE\n            preserveViewport:        false, //SEQUENCE\n            preserveOverlays:        false, //SEQUENCE\n            navPrevNextWrap:         false, //SEQUENCE\n            showNavigationControl:   true,  //ZOOM/HOME/FULL/ROTATION\n            navigationControlAnchor: null,  //ZOOM/HOME/FULL/ROTATION\n            showZoomControl:         true,  //ZOOM\n            showHomeControl:         true,  //HOME\n            showFullPageControl:     true,  //FULL\n            showRotationControl:     false, //ROTATION\n            showFlipControl:         false,  //FLIP\n            controlsFadeDelay:       2000,  //ZOOM/HOME/FULL/SEQUENCE\n            controlsFadeLength:      1500,  //ZOOM/HOME/FULL/SEQUENCE\n            mouseNavEnabled:         true,  //GENERAL MOUSE INTERACTIVITY\n\n            //VIEWPORT NAVIGATOR SETTINGS\n            showNavigator:              false,\n            navigatorId:                null,\n            navigatorPosition:          null,\n            navigatorSizeRatio:         0.2,\n            navigatorMaintainSizeRatio: false,\n            navigatorTop:               null,\n            navigatorLeft:              null,\n            navigatorHeight:            null,\n            navigatorWidth:             null,\n            navigatorAutoResize:        true,\n            navigatorAutoFade:          true,\n            navigatorRotate:            true,\n            navigatorBackground:        '#000',\n            navigatorOpacity:           0.8,\n            navigatorBorderColor:       '#555',\n            navigatorDisplayRegionColor: '#900',\n\n            // INITIAL ROTATION\n            degrees:                    0,\n\n            // INITIAL FLIP STATE\n            flipped:                    false,\n\n            // APPEARANCE\n            opacity:                           1,\n            preload:                           false,\n            compositeOperation:                null,\n            imageSmoothingEnabled:             true,\n            placeholderFillStyle:              null,\n            subPixelRoundingForTransparency:   null,\n\n            //REFERENCE STRIP SETTINGS\n            showReferenceStrip:          false,\n            referenceStripScroll:       'horizontal',\n            referenceStripElement:       null,\n            referenceStripHeight:        null,\n            referenceStripWidth:         null,\n            referenceStripPosition:      'BOTTOM_LEFT',\n            referenceStripSizeRatio:     0.2,\n\n            //COLLECTION VISUALIZATION SETTINGS\n            collectionRows:         3, //or columns depending on layout\n            collectionColumns:      0, //columns in horizontal layout, rows in vertical layout\n            collectionLayout:       'horizontal', //vertical\n            collectionMode:         false,\n            collectionTileSize:     800,\n            collectionTileMargin:   80,\n\n            //PERFORMANCE SETTINGS\n            imageLoaderLimit:       0,\n            maxImageCacheCount:     200,\n            timeout:                30000,\n            useCanvas:              true,  // Use canvas element for drawing if available\n\n            //INTERFACE RESOURCE SETTINGS\n            prefixUrl:              \"/images/\",\n            navImages: {\n                zoomIn: {\n                    REST:   'zoomin_rest.png',\n                    GROUP:  'zoomin_grouphover.png',\n                    HOVER:  'zoomin_hover.png',\n                    DOWN:   'zoomin_pressed.png'\n                },\n                zoomOut: {\n                    REST:   'zoomout_rest.png',\n                    GROUP:  'zoomout_grouphover.png',\n                    HOVER:  'zoomout_hover.png',\n                    DOWN:   'zoomout_pressed.png'\n                },\n                home: {\n                    REST:   'home_rest.png',\n                    GROUP:  'home_grouphover.png',\n                    HOVER:  'home_hover.png',\n                    DOWN:   'home_pressed.png'\n                },\n                fullpage: {\n                    REST:   'fullpage_rest.png',\n                    GROUP:  'fullpage_grouphover.png',\n                    HOVER:  'fullpage_hover.png',\n                    DOWN:   'fullpage_pressed.png'\n                },\n                rotateleft: {\n                    REST:   'rotateleft_rest.png',\n                    GROUP:  'rotateleft_grouphover.png',\n                    HOVER:  'rotateleft_hover.png',\n                    DOWN:   'rotateleft_pressed.png'\n                },\n                rotateright: {\n                    REST:   'rotateright_rest.png',\n                    GROUP:  'rotateright_grouphover.png',\n                    HOVER:  'rotateright_hover.png',\n                    DOWN:   'rotateright_pressed.png'\n                },\n                flip: { // Flip icon designed by Yaroslav Samoylov from the Noun Project and modified by Nelson Campos ncampos@criteriamarathon.com, https://thenounproject.com/term/flip/136289/\n                    REST:   'flip_rest.png',\n                    GROUP:  'flip_grouphover.png',\n                    HOVER:  'flip_hover.png',\n                    DOWN:   'flip_pressed.png'\n                },\n                previous: {\n                    REST:   'previous_rest.png',\n                    GROUP:  'previous_grouphover.png',\n                    HOVER:  'previous_hover.png',\n                    DOWN:   'previous_pressed.png'\n                },\n                next: {\n                    REST:   'next_rest.png',\n                    GROUP:  'next_grouphover.png',\n                    HOVER:  'next_hover.png',\n                    DOWN:   'next_pressed.png'\n                }\n            },\n\n            //DEVELOPER SETTINGS\n            debugMode:              false,\n            debugGridColor:         ['#437AB2', '#1B9E77', '#D95F02', '#7570B3', '#E7298A', '#66A61E', '#E6AB02', '#A6761D', '#666666'],\n            silenceMultiImageWarnings: false\n\n        },\n\n\n        /**\n         * TODO: get rid of this.  I can't see how it's required at all.  Looks\n         *       like an early legacy code artifact.\n         * @static\n         * @ignore\n         */\n        SIGNAL: \"----seadragon----\",\n\n\n        /**\n         * Returns a function which invokes the method as if it were a method belonging to the object.\n         * @function\n         * @param {Object} object\n         * @param {Function} method\n         * @returns {Function}\n         */\n        delegate: function( object, method ) {\n            return function(){\n                var args = arguments;\n                if ( args === undefined ){\n                    args = [];\n                }\n                return method.apply( object, args );\n            };\n        },\n\n\n        /**\n         * An enumeration of Browser vendors.\n         * @static\n         * @type {Object}\n         * @property {Number} UNKNOWN\n         * @property {Number} IE\n         * @property {Number} FIREFOX\n         * @property {Number} SAFARI\n         * @property {Number} CHROME\n         * @property {Number} OPERA\n         * @property {Number} EDGE\n         * @property {Number} CHROMEEDGE\n         */\n        BROWSERS: {\n            UNKNOWN:    0,\n            IE:         1,\n            FIREFOX:    2,\n            SAFARI:     3,\n            CHROME:     4,\n            OPERA:      5,\n            EDGE:       6,\n            CHROMEEDGE: 7\n        },\n\n        /**\n         * An enumeration of when subpixel rounding should occur.\n         * @static\n         * @type {Object}\n         * @property {Number} NEVER Never apply subpixel rounding for transparency.\n         * @property {Number} ONLY_AT_REST Do not apply subpixel rounding for transparency during animation (panning, zoom, rotation) and apply it once animation is over.\n         * @property {Number} ALWAYS Apply subpixel rounding for transparency during animation and when animation is over.\n         */\n        SUBPIXEL_ROUNDING_OCCURRENCES: {\n            NEVER:        0,\n            ONLY_AT_REST: 1,\n            ALWAYS:       2\n        },\n\n        /**\n         * Keep track of which {@link Viewer}s have been created.\n         * - Key: {@link Element} to which a Viewer is attached.\n         * - Value: {@link Viewer} of the element defined by the key.\n         * @private\n         * @static\n         * @type {Object}\n         */\n        _viewers: new Map(),\n\n       /**\n         * Returns the {@link Viewer} attached to a given DOM element. If there is\n         * no viewer attached to the provided element, undefined is returned.\n         * @function\n         * @param {String|Element} element Accepts an id or element.\n         * @returns {Viewer} The viewer attached to the given element, or undefined.\n         */\n        getViewer: function(element) {\n            return $._viewers.get(this.getElement(element));\n        },\n\n        /**\n         * Returns a DOM Element for the given id or element.\n         * @function\n         * @param {String|Element} element Accepts an id or element.\n         * @returns {Element} The element with the given id, null, or the element itself.\n         */\n        getElement: function( element ) {\n            if ( typeof ( element ) === \"string\" ) {\n                element = document.getElementById( element );\n            }\n            return element;\n        },\n\n\n        /**\n         * Determines the position of the upper-left corner of the element.\n         * @function\n         * @param {Element|String} element - the element we want the position for.\n         * @returns {OpenSeadragon.Point} - the position of the upper left corner of the element.\n         */\n        getElementPosition: function( element ) {\n            var result = new $.Point(),\n                isFixed,\n                offsetParent;\n\n            element      = $.getElement( element );\n            isFixed      = $.getElementStyle( element ).position === \"fixed\";\n            offsetParent = getOffsetParent( element, isFixed );\n\n            while ( offsetParent ) {\n\n                result.x += element.offsetLeft;\n                result.y += element.offsetTop;\n\n                if ( isFixed ) {\n                    result = result.plus( $.getPageScroll() );\n                }\n\n                element = offsetParent;\n                isFixed = $.getElementStyle( element ).position === \"fixed\";\n                offsetParent = getOffsetParent( element, isFixed );\n            }\n\n            return result;\n        },\n\n\n        /**\n         * Determines the position of the upper-left corner of the element adjusted for current page and/or element scroll.\n         * @function\n         * @param {Element|String} element - the element we want the position for.\n         * @returns {OpenSeadragon.Point} - the position of the upper left corner of the element adjusted for current page and/or element scroll.\n         */\n        getElementOffset: function( element ) {\n            element = $.getElement( element );\n\n            var doc = element && element.ownerDocument,\n                docElement,\n                win,\n                boundingRect = { top: 0, left: 0 };\n\n            if ( !doc ) {\n                return new $.Point();\n            }\n\n            docElement = doc.documentElement;\n\n            if ( typeof element.getBoundingClientRect !== typeof undefined ) {\n                boundingRect = element.getBoundingClientRect();\n            }\n\n            win = ( doc === doc.window ) ?\n                doc :\n                ( doc.nodeType === 9 ) ?\n                    doc.defaultView || doc.parentWindow :\n                    false;\n\n            return new $.Point(\n                boundingRect.left + ( win.pageXOffset || docElement.scrollLeft ) - ( docElement.clientLeft || 0 ),\n                boundingRect.top + ( win.pageYOffset || docElement.scrollTop ) - ( docElement.clientTop || 0 )\n            );\n        },\n\n\n        /**\n         * Determines the height and width of the given element.\n         * @function\n         * @param {Element|String} element\n         * @returns {OpenSeadragon.Point}\n         */\n        getElementSize: function( element ) {\n            element = $.getElement( element );\n\n            return new $.Point(\n                element.clientWidth,\n                element.clientHeight\n            );\n        },\n\n\n        /**\n         * Returns the CSSStyle object for the given element.\n         * @function\n         * @param {Element|String} element\n         * @returns {CSSStyle}\n         */\n        getElementStyle:\n            document.documentElement.currentStyle ?\n            function( element ) {\n                element = $.getElement( element );\n                return element.currentStyle;\n            } :\n            function( element ) {\n                element = $.getElement( element );\n                return window.getComputedStyle( element, \"\" );\n            },\n\n        /**\n         * Returns the property with the correct vendor prefix appended.\n         * @param {String} property the property name\n         * @returns {String} the property with the correct prefix or null if not\n         * supported.\n         */\n        getCssPropertyWithVendorPrefix: function(property) {\n            var memo = {};\n\n            $.getCssPropertyWithVendorPrefix = function(property) {\n                if (memo[property] !== undefined) {\n                    return memo[property];\n                }\n                var style = document.createElement('div').style;\n                var result = null;\n                if (style[property] !== undefined) {\n                    result = property;\n                } else {\n                    var prefixes = ['Webkit', 'Moz', 'MS', 'O',\n                        'webkit', 'moz', 'ms', 'o'];\n                    var suffix = $.capitalizeFirstLetter(property);\n                    for (var i = 0; i < prefixes.length; i++) {\n                        var prop = prefixes[i] + suffix;\n                        if (style[prop] !== undefined) {\n                            result = prop;\n                            break;\n                        }\n                    }\n                }\n                memo[property] = result;\n                return result;\n            };\n            return $.getCssPropertyWithVendorPrefix(property);\n        },\n\n        /**\n         * Capitalizes the first letter of a string\n         * @param {String} string\n         * @returns {String} The string with the first letter capitalized\n         */\n        capitalizeFirstLetter: function(string) {\n            return string.charAt(0).toUpperCase() + string.slice(1);\n        },\n\n        /**\n         * Compute the modulo of a number but makes sure to always return\n         * a positive value.\n         * @param {Number} number the number to computes the modulo of\n         * @param {Number} modulo the modulo\n         * @returns {Number} the result of the modulo of number\n         */\n        positiveModulo: function(number, modulo) {\n            var result = number % modulo;\n            if (result < 0) {\n                result += modulo;\n            }\n            return result;\n        },\n\n        /**\n         * Determines if a point is within the bounding rectangle of the given element (hit-test).\n         * @function\n         * @param {Element|String} element\n         * @param {OpenSeadragon.Point} point\n         * @returns {Boolean}\n         */\n        pointInElement: function( element, point ) {\n            element = $.getElement( element );\n            var offset = $.getElementOffset( element ),\n                size = $.getElementSize( element );\n            return point.x >= offset.x && point.x < offset.x + size.x && point.y < offset.y + size.y && point.y >= offset.y;\n        },\n\n\n        /**\n         * Gets the position of the mouse on the screen for a given event.\n         * @function\n         * @param {Event} [event]\n         * @returns {OpenSeadragon.Point}\n         */\n        getMousePosition: function( event ) {\n\n            if ( typeof ( event.pageX ) === \"number\" ) {\n                $.getMousePosition = function( event ){\n                    var result = new $.Point();\n\n                    result.x = event.pageX;\n                    result.y = event.pageY;\n\n                    return result;\n                };\n            } else if ( typeof ( event.clientX ) === \"number\" ) {\n                $.getMousePosition = function( event ){\n                    var result = new $.Point();\n\n                    result.x =\n                        event.clientX +\n                        document.body.scrollLeft +\n                        document.documentElement.scrollLeft;\n                    result.y =\n                        event.clientY +\n                        document.body.scrollTop +\n                        document.documentElement.scrollTop;\n\n                    return result;\n                };\n            } else {\n                throw new Error(\n                    \"Unknown event mouse position, no known technique.\"\n                );\n            }\n\n            return $.getMousePosition( event );\n        },\n\n\n        /**\n         * Determines the page's current scroll position.\n         * @function\n         * @returns {OpenSeadragon.Point}\n         */\n        getPageScroll: function() {\n            var docElement  = document.documentElement || {},\n                body        = document.body || {};\n\n            if ( typeof ( window.pageXOffset ) === \"number\" ) {\n                $.getPageScroll = function(){\n                    return new $.Point(\n                        window.pageXOffset,\n                        window.pageYOffset\n                    );\n                };\n            } else if ( body.scrollLeft || body.scrollTop ) {\n                $.getPageScroll = function(){\n                    return new $.Point(\n                        document.body.scrollLeft,\n                        document.body.scrollTop\n                    );\n                };\n            } else if ( docElement.scrollLeft || docElement.scrollTop ) {\n                $.getPageScroll = function(){\n                    return new $.Point(\n                        document.documentElement.scrollLeft,\n                        document.documentElement.scrollTop\n                    );\n                };\n            } else {\n                // We can't reassign the function yet, as there was no scroll.\n                return new $.Point(0, 0);\n            }\n\n            return $.getPageScroll();\n        },\n\n        /**\n         * Set the page scroll position.\n         * @function\n         * @returns {OpenSeadragon.Point}\n         */\n        setPageScroll: function( scroll ) {\n            if ( typeof ( window.scrollTo ) !== \"undefined\" ) {\n                $.setPageScroll = function( scroll ) {\n                    window.scrollTo( scroll.x, scroll.y );\n                };\n            } else {\n                var originalScroll = $.getPageScroll();\n                if ( originalScroll.x === scroll.x &&\n                    originalScroll.y === scroll.y ) {\n                    // We are already correctly positioned and there\n                    // is no way to detect the correct method.\n                    return;\n                }\n\n                document.body.scrollLeft = scroll.x;\n                document.body.scrollTop = scroll.y;\n                var currentScroll = $.getPageScroll();\n                if ( currentScroll.x !== originalScroll.x &&\n                    currentScroll.y !== originalScroll.y ) {\n                    $.setPageScroll = function( scroll ) {\n                        document.body.scrollLeft = scroll.x;\n                        document.body.scrollTop = scroll.y;\n                    };\n                    return;\n                }\n\n                document.documentElement.scrollLeft = scroll.x;\n                document.documentElement.scrollTop = scroll.y;\n                currentScroll = $.getPageScroll();\n                if ( currentScroll.x !== originalScroll.x &&\n                    currentScroll.y !== originalScroll.y ) {\n                    $.setPageScroll = function( scroll ) {\n                        document.documentElement.scrollLeft = scroll.x;\n                        document.documentElement.scrollTop = scroll.y;\n                    };\n                    return;\n                }\n\n                // We can't find anything working, so we do nothing.\n                $.setPageScroll = function( scroll ) {\n                };\n            }\n\n            $.setPageScroll( scroll );\n        },\n\n        /**\n         * Determines the size of the browsers window.\n         * @function\n         * @returns {OpenSeadragon.Point}\n         */\n        getWindowSize: function() {\n            var docElement = document.documentElement || {},\n                body    = document.body || {};\n\n            if ( typeof ( window.innerWidth ) === 'number' ) {\n                $.getWindowSize = function(){\n                    return new $.Point(\n                        window.innerWidth,\n                        window.innerHeight\n                    );\n                };\n            } else if ( docElement.clientWidth || docElement.clientHeight ) {\n                $.getWindowSize = function(){\n                    return new $.Point(\n                        document.documentElement.clientWidth,\n                        document.documentElement.clientHeight\n                    );\n                };\n            } else if ( body.clientWidth || body.clientHeight ) {\n                $.getWindowSize = function(){\n                    return new $.Point(\n                        document.body.clientWidth,\n                        document.body.clientHeight\n                    );\n                };\n            } else {\n                throw new Error(\"Unknown window size, no known technique.\");\n            }\n\n            return $.getWindowSize();\n        },\n\n\n        /**\n         * Wraps the given element in a nest of divs so that the element can\n         * be easily centered using CSS tables\n         * @function\n         * @param {Element|String} element\n         * @returns {Element} outermost wrapper element\n         */\n        makeCenteredNode: function( element ) {\n            // Convert a possible ID to an actual HTMLElement\n            element = $.getElement( element );\n\n            /*\n                CSS tables require you to have a display:table/row/cell hierarchy so we need to create\n                three nested wrapper divs:\n             */\n\n            var wrappers = [\n                $.makeNeutralElement( 'div' ),\n                $.makeNeutralElement( 'div' ),\n                $.makeNeutralElement( 'div' )\n            ];\n\n            // It feels like we should be able to pass style dicts to makeNeutralElement:\n            $.extend(wrappers[0].style, {\n                display: \"table\",\n                height: \"100%\",\n                width: \"100%\"\n            });\n\n            $.extend(wrappers[1].style, {\n                display: \"table-row\"\n            });\n\n            $.extend(wrappers[2].style, {\n                display: \"table-cell\",\n                verticalAlign: \"middle\",\n                textAlign: \"center\"\n            });\n\n            wrappers[0].appendChild(wrappers[1]);\n            wrappers[1].appendChild(wrappers[2]);\n            wrappers[2].appendChild(element);\n\n            return wrappers[0];\n        },\n\n\n        /**\n         * Creates an easily positionable element of the given type that therefor\n         * serves as an excellent container element.\n         * @function\n         * @param {String} tagName\n         * @returns {Element}\n         */\n        makeNeutralElement: function( tagName ) {\n            var element = document.createElement( tagName ),\n                style   = element.style;\n\n            style.background = \"transparent none\";\n            style.border     = \"none\";\n            style.margin     = \"0px\";\n            style.padding    = \"0px\";\n            style.position   = \"static\";\n\n            return element;\n        },\n\n\n        /**\n         * Returns the current milliseconds, using Date.now() if available\n         * @function\n         */\n        now: function( ) {\n            if (Date.now) {\n                $.now = Date.now;\n            } else {\n                $.now = function() {\n                    return new Date().getTime();\n                };\n            }\n\n            return $.now();\n        },\n\n\n        /**\n         * Ensures an image is loaded correctly to support alpha transparency.\n         * @function\n         * @param {String} src\n         * @returns {Element}\n         */\n        makeTransparentImage: function( src ) {\n            var img = $.makeNeutralElement( \"img\" );\n\n            img.src = src;\n\n            return img;\n        },\n\n\n        /**\n         * Sets the opacity of the specified element.\n         * @function\n         * @param {Element|String} element\n         * @param {Number} opacity\n         * @param {Boolean} [usesAlpha]\n         */\n        setElementOpacity: function( element, opacity, usesAlpha ) {\n\n            var ieOpacity,\n                ieFilter;\n\n            element = $.getElement( element );\n\n            if ( usesAlpha && !$.Browser.alpha ) {\n                opacity = Math.round( opacity );\n            }\n\n            if ( $.Browser.opacity ) {\n                element.style.opacity = opacity < 1 ? opacity : \"\";\n            } else {\n                if ( opacity < 1 ) {\n                    ieOpacity = Math.round( 100 * opacity );\n                    ieFilter  = \"alpha(opacity=\" + ieOpacity + \")\";\n                    element.style.filter = ieFilter;\n                } else {\n                    element.style.filter = \"\";\n                }\n            }\n        },\n\n\n        /**\n         * Sets the specified element's touch-action style attribute to 'none'.\n         * @function\n         * @param {Element|String} element\n         */\n        setElementTouchActionNone: function( element ) {\n            element = $.getElement( element );\n            if ( typeof element.style.touchAction !== 'undefined' ) {\n                element.style.touchAction = 'none';\n            } else if ( typeof element.style.msTouchAction !== 'undefined' ) {\n                element.style.msTouchAction = 'none';\n            }\n        },\n\n\n        /**\n         * Sets the specified element's pointer-events style attribute to the passed value.\n         * @function\n         * @param {Element|String} element\n         * @param {String} value\n         */\n        setElementPointerEvents: function( element, value ) {\n            element = $.getElement( element );\n            if (typeof element.style !== 'undefined' && typeof element.style.pointerEvents !== 'undefined' ) {\n                element.style.pointerEvents = value;\n            }\n        },\n\n\n        /**\n         * Sets the specified element's pointer-events style attribute to 'none'.\n         * @function\n         * @param {Element|String} element\n         */\n        setElementPointerEventsNone: function( element ) {\n            $.setElementPointerEvents( element, 'none' );\n        },\n\n\n        /**\n         * Add the specified CSS class to the element if not present.\n         * @function\n         * @param {Element|String} element\n         * @param {String} className\n         */\n        addClass: function( element, className ) {\n            element = $.getElement( element );\n\n            if (!element.className) {\n                element.className = className;\n            } else if ( ( ' ' + element.className + ' ' ).\n                indexOf( ' ' + className + ' ' ) === -1 ) {\n                element.className += ' ' + className;\n            }\n        },\n\n        /**\n         * Find the first index at which an element is found in an array or -1\n         * if not present.\n         *\n         * Code taken and adapted from\n         * https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/indexOf#Compatibility\n         *\n         * @function\n         * @param {Array} array The array from which to find the element\n         * @param {Object} searchElement The element to find\n         * @param {Number} [fromIndex=0] Index to start research.\n         * @returns {Number} The index of the element in the array.\n         */\n        indexOf: function( array, searchElement, fromIndex ) {\n            if ( Array.prototype.indexOf ) {\n                this.indexOf = function( array, searchElement, fromIndex ) {\n                    return array.indexOf( searchElement, fromIndex );\n                };\n            } else {\n                this.indexOf = function( array, searchElement, fromIndex ) {\n                    var i,\n                        pivot = ( fromIndex ) ? fromIndex : 0,\n                        length;\n                    if ( !array ) {\n                        throw new TypeError( );\n                    }\n\n                    length = array.length;\n                    if ( length === 0 || pivot >= length ) {\n                        return -1;\n                    }\n\n                    if ( pivot < 0 ) {\n                        pivot = length - Math.abs( pivot );\n                    }\n\n                    for ( i = pivot; i < length; i++ ) {\n                        if ( array[i] === searchElement ) {\n                            return i;\n                        }\n                    }\n                    return -1;\n                };\n            }\n            return this.indexOf( array, searchElement, fromIndex );\n        },\n\n        /**\n         * Remove the specified CSS class from the element.\n         * @function\n         * @param {Element|String} element\n         * @param {String} className\n         */\n        removeClass: function( element, className ) {\n            var oldClasses,\n                newClasses = [],\n                i;\n\n            element = $.getElement( element );\n            oldClasses = element.className.split( /\\s+/ );\n            for ( i = 0; i < oldClasses.length; i++ ) {\n                if ( oldClasses[ i ] && oldClasses[ i ] !== className ) {\n                    newClasses.push( oldClasses[ i ] );\n                }\n            }\n            element.className = newClasses.join(' ');\n        },\n\n        /**\n         * Convert passed addEventListener() options to boolean or options object,\n         * depending on browser support.\n         * @function\n         * @param {Boolean|Object} [options] Boolean useCapture, or if [supportsEventListenerOptions]{@link OpenSeadragon.supportsEventListenerOptions}, can be an object\n         * @param {Boolean} [options.capture]\n         * @param {Boolean} [options.passive]\n         * @param {Boolean} [options.once]\n         * @return {String} The protocol (http:, https:, file:, ftp: ...)\n         */\n        normalizeEventListenerOptions: function (options) {\n            var opts;\n            if ( typeof options !== 'undefined' ) {\n                if ( typeof options === 'boolean' ) {\n                    // Legacy Boolean useCapture\n                    opts = $.supportsEventListenerOptions ? { capture: options } : options;\n                } else {\n                    // Options object\n                    opts = $.supportsEventListenerOptions ? options :\n                        ( ( typeof options.capture !== 'undefined' ) ? options.capture : false );\n                }\n            } else {\n                // No options specified - Legacy optional useCapture argument\n                //   (for IE, first supported on version 9, so we'll pass a Boolean)\n                opts = $.supportsEventListenerOptions ? { capture: false } : false;\n            }\n            return opts;\n        },\n\n        /**\n         * Adds an event listener for the given element, eventName and handler.\n         * @function\n         * @param {Element|String} element\n         * @param {String} eventName\n         * @param {Function} handler\n         * @param {Boolean|Object} [options] Boolean useCapture, or if [supportsEventListenerOptions]{@link OpenSeadragon.supportsEventListenerOptions}, can be an object\n         * @param {Boolean} [options.capture]\n         * @param {Boolean} [options.passive]\n         * @param {Boolean} [options.once]\n         */\n        addEvent: (function () {\n            if ( $.supportsAddEventListener ) {\n                return function ( element, eventName, handler, options ) {\n                    options = $.normalizeEventListenerOptions(options);\n                    element = $.getElement( element );\n                    element.addEventListener( eventName, handler, options );\n                };\n            } else if ( document.documentElement.attachEvent && document.attachEvent ) {\n                return function ( element, eventName, handler ) {\n                    element = $.getElement( element );\n                    element.attachEvent( 'on' + eventName, handler );\n                };\n            } else {\n                throw new Error( \"No known event model.\" );\n            }\n        }()),\n\n\n        /**\n         * Remove a given event listener for the given element, event type and\n         * handler.\n         * @function\n         * @param {Element|String} element\n         * @param {String} eventName\n         * @param {Function} handler\n         * @param {Boolean|Object} [options] Boolean useCapture, or if [supportsEventListenerOptions]{@link OpenSeadragon.supportsEventListenerOptions}, can be an object\n         * @param {Boolean} [options.capture]\n         */\n        removeEvent: (function () {\n            if ( $.supportsRemoveEventListener ) {\n                return function ( element, eventName, handler, options ) {\n                    options = $.normalizeEventListenerOptions(options);\n                    element = $.getElement( element );\n                    element.removeEventListener( eventName, handler, options );\n                };\n            } else if ( document.documentElement.detachEvent && document.detachEvent ) {\n                return function( element, eventName, handler ) {\n                    element = $.getElement( element );\n                    element.detachEvent( 'on' + eventName, handler );\n                };\n            } else {\n                throw new Error( \"No known event model.\" );\n            }\n        }()),\n\n\n        /**\n         * Cancels the default browser behavior had the event propagated all\n         * the way up the DOM to the window object.\n         * @function\n         * @param {Event} [event]\n         */\n        cancelEvent: function( event ) {\n            event.preventDefault();\n        },\n\n\n        /**\n         * Returns true if {@link OpenSeadragon.cancelEvent|cancelEvent} has been called on\n         * the event, otherwise returns false.\n         * @function\n         * @param {Event} [event]\n         */\n        eventIsCanceled: function( event ) {\n            return event.defaultPrevented;\n        },\n\n\n        /**\n         * Stops the propagation of the event through the DOM in the capturing and bubbling phases.\n         * @function\n         * @param {Event} [event]\n         */\n        stopEvent: function( event ) {\n            event.stopPropagation();\n        },\n\n\n        /**\n         * Similar to OpenSeadragon.delegate, but it does not immediately call\n         * the method on the object, returning a function which can be called\n         * repeatedly to delegate the method. It also allows additional arguments\n         * to be passed during construction which will be added during each\n         * invocation, and each invocation can add additional arguments as well.\n         *\n         * @function\n         * @param {Object} object\n         * @param {Function} method\n         * @param [args] any additional arguments are passed as arguments to the\n         *  created callback\n         * @returns {Function}\n         */\n        createCallback: function( object, method ) {\n            //TODO: This pattern is painful to use and debug.  It's much cleaner\n            //      to use pinning plus anonymous functions.  Get rid of this\n            //      pattern!\n            var initialArgs = [],\n                i;\n            for ( i = 2; i < arguments.length; i++ ) {\n                initialArgs.push( arguments[ i ] );\n            }\n\n            return function() {\n                var args = initialArgs.concat( [] ),\n                    i;\n                for ( i = 0; i < arguments.length; i++ ) {\n                    args.push( arguments[ i ] );\n                }\n\n                return method.apply( object, args );\n            };\n        },\n\n\n        /**\n         * Retrieves the value of a url parameter from the window.location string.\n         * @function\n         * @param {String} key\n         * @returns {String} The value of the url parameter or null if no param matches.\n         */\n        getUrlParameter: function( key ) {\n            // eslint-disable-next-line no-use-before-define\n            var value = URLPARAMS[ key ];\n            return value ? value : null;\n        },\n\n        /**\n         * Retrieves the protocol used by the url. The url can either be absolute\n         * or relative.\n         * @function\n         * @private\n         * @param {String} url The url to retrieve the protocol from.\n         * @return {String} The protocol (http:, https:, file:, ftp: ...)\n         */\n        getUrlProtocol: function( url ) {\n            var match = url.match(/^([a-z]+:)\\/\\//i);\n            if ( match === null ) {\n                // Relative URL, retrive the protocol from window.location\n                return window.location.protocol;\n            }\n            return match[1].toLowerCase();\n        },\n\n        /**\n         * Create an XHR object\n         * @private\n         * @param {type} [local] If set to true, the XHR will be file: protocol\n         * compatible if possible (but may raise a warning in the browser).\n         * @returns {XMLHttpRequest}\n         */\n        createAjaxRequest: function( local ) {\n            // IE11 does not support window.ActiveXObject so we just try to\n            // create one to see if it is supported.\n            // See: http://msdn.microsoft.com/en-us/library/ie/dn423948%28v=vs.85%29.aspx\n            var supportActiveX;\n            try {\n                /* global ActiveXObject:true */\n                supportActiveX = !!new ActiveXObject( \"Microsoft.XMLHTTP\" );\n            } catch( e ) {\n                supportActiveX = false;\n            }\n\n            if ( supportActiveX ) {\n                if ( window.XMLHttpRequest ) {\n                    $.createAjaxRequest = function( local ) {\n                        if ( local ) {\n                            return new ActiveXObject( \"Microsoft.XMLHTTP\" );\n                        }\n                        return new XMLHttpRequest();\n                    };\n                } else {\n                    $.createAjaxRequest = function() {\n                        return new ActiveXObject( \"Microsoft.XMLHTTP\" );\n                    };\n                }\n            } else if ( window.XMLHttpRequest ) {\n                $.createAjaxRequest = function() {\n                    return new XMLHttpRequest();\n                };\n            } else {\n                throw new Error( \"Browser doesn't support XMLHttpRequest.\" );\n            }\n            return $.createAjaxRequest( local );\n        },\n\n        /**\n         * Makes an AJAX request.\n         * @param {Object} options\n         * @param {String} options.url - the url to request\n         * @param {Function} options.success - a function to call on a successful response\n         * @param {Function} options.error - a function to call on when an error occurs\n         * @param {Object} options.headers - headers to add to the AJAX request\n         * @param {String} options.responseType - the response type of the AJAX request\n         * @param {String} options.postData - HTTP POST data (usually but not necessarily in k=v&k2=v2... form,\n         *      see TileSrouce::getPostData), GET method used if null\n         * @param {Boolean} [options.withCredentials=false] - whether to set the XHR's withCredentials\n         * @throws {Error}\n         * @returns {XMLHttpRequest}\n         */\n        makeAjaxRequest: function( url, onSuccess, onError ) {\n            var withCredentials;\n            var headers;\n            var responseType;\n            var postData;\n\n            // Note that our preferred API is that you pass in a single object; the named\n            // arguments are for legacy support.\n            if( $.isPlainObject( url ) ){\n                onSuccess = url.success;\n                onError = url.error;\n                withCredentials = url.withCredentials;\n                headers = url.headers;\n                responseType = url.responseType || null;\n                postData = url.postData || null;\n                url = url.url;\n            }\n\n            var protocol = $.getUrlProtocol( url );\n            var request = $.createAjaxRequest( protocol === \"file:\" );\n\n            if ( !$.isFunction( onSuccess ) ) {\n                throw new Error( \"makeAjaxRequest requires a success callback\" );\n            }\n\n            request.onreadystatechange = function() {\n                // 4 = DONE (https://developer.mozilla.org/en-US/docs/Web/API/XMLHttpRequest#Properties)\n                if ( request.readyState === 4 ) {\n                    request.onreadystatechange = function(){};\n\n                    // With protocols other than http/https, a successful request status is in\n                    // the 200's on Firefox and 0 on other browsers\n                    if ( (request.status >= 200 && request.status < 300) ||\n                        ( request.status === 0 &&\n                          protocol !== \"http:\" &&\n                          protocol !== \"https:\" )) {\n                        onSuccess( request );\n                    } else {\n                        if ( $.isFunction( onError ) ) {\n                            onError( request );\n                        } else {\n                            $.console.error( \"AJAX request returned %d: %s\", request.status, url );\n                        }\n                    }\n                }\n            };\n\n            var method = postData ? \"POST\" : \"GET\";\n            try {\n                request.open( method, url, true );\n\n                if (responseType) {\n                    request.responseType = responseType;\n                }\n\n                if (headers) {\n                    for (var headerName in headers) {\n                        if (Object.prototype.hasOwnProperty.call(headers, headerName) && headers[headerName]) {\n                            request.setRequestHeader(headerName, headers[headerName]);\n                        }\n                    }\n                }\n\n                if (withCredentials) {\n                    request.withCredentials = true;\n                }\n\n                request.send(postData);\n            } catch (e) {\n                $.console.error( \"%s while making AJAX request: %s\", e.name, e.message );\n\n                request.onreadystatechange = function(){};\n\n                if ( $.isFunction( onError ) ) {\n                    onError( request, e );\n                }\n            }\n\n            return request;\n        },\n\n        /**\n         * Taken from jQuery 1.6.1\n         * @function\n         * @param {Object} options\n         * @param {String} options.url\n         * @param {Function} options.callback\n         * @param {String} [options.param='callback'] The name of the url parameter\n         *      to request the jsonp provider with.\n         * @param {String} [options.callbackName=] The name of the callback to\n         *      request the jsonp provider with.\n         */\n        jsonp: function( options ){\n            var script,\n                url     = options.url,\n                head    = document.head ||\n                    document.getElementsByTagName( \"head\" )[ 0 ] ||\n                    document.documentElement,\n                jsonpCallback = options.callbackName || 'openseadragon' + $.now(),\n                previous      = window[ jsonpCallback ],\n                replace       = \"$1\" + jsonpCallback + \"$2\",\n                callbackParam = options.param || 'callback',\n                callback      = options.callback;\n\n            url = url.replace( /(=)\\?(&|$)|\\?\\?/i, replace );\n            // Add callback manually\n            url += (/\\?/.test( url ) ? \"&\" : \"?\") + callbackParam + \"=\" + jsonpCallback;\n\n            // Install callback\n            window[ jsonpCallback ] = function( response ) {\n                if ( !previous ){\n                    try{\n                        delete window[ jsonpCallback ];\n                    }catch(e){\n                        //swallow\n                    }\n                } else {\n                    window[ jsonpCallback ] = previous;\n                }\n                if( callback && $.isFunction( callback ) ){\n                    callback( response );\n                }\n            };\n\n            script = document.createElement( \"script\" );\n\n            //TODO: having an issue with async info requests\n            if( undefined !== options.async || false !== options.async ){\n                script.async = \"async\";\n            }\n\n            if ( options.scriptCharset ) {\n                script.charset = options.scriptCharset;\n            }\n\n            script.src = url;\n\n            // Attach handlers for all browsers\n            script.onload = script.onreadystatechange = function( _, isAbort ) {\n\n                if ( isAbort || !script.readyState || /loaded|complete/.test( script.readyState ) ) {\n\n                    // Handle memory leak in IE\n                    script.onload = script.onreadystatechange = null;\n\n                    // Remove the script\n                    if ( head && script.parentNode ) {\n                        head.removeChild( script );\n                    }\n\n                    // Dereference the script\n                    script = undefined;\n                }\n            };\n            // Use insertBefore instead of appendChild  to circumvent an IE6 bug.\n            // This arises when a base node is used (#2709 and #4378).\n            head.insertBefore( script, head.firstChild );\n\n        },\n\n\n        /**\n         * Fully deprecated. Will throw an error.\n         * @function\n         * @deprecated use {@link OpenSeadragon.Viewer#open}\n         */\n        createFromDZI: function() {\n            throw \"OpenSeadragon.createFromDZI is deprecated, use Viewer.open.\";\n        },\n\n        /**\n         * Parses an XML string into a DOM Document.\n         * @function\n         * @param {String} string\n         * @returns {Document}\n         */\n        parseXml: function( string ) {\n            if ( window.DOMParser ) {\n\n                $.parseXml = function( string ) {\n                    var xmlDoc = null,\n                        parser;\n\n                    parser = new DOMParser();\n                    xmlDoc = parser.parseFromString( string, \"text/xml\" );\n                    return xmlDoc;\n                };\n\n            } else if ( window.ActiveXObject ) {\n\n                $.parseXml = function( string ) {\n                    var xmlDoc = null;\n\n                    xmlDoc = new ActiveXObject( \"Microsoft.XMLDOM\" );\n                    xmlDoc.async = false;\n                    xmlDoc.loadXML( string );\n                    return xmlDoc;\n                };\n\n            } else {\n                throw new Error( \"Browser doesn't support XML DOM.\" );\n            }\n\n            return $.parseXml( string );\n        },\n\n        /**\n         * Parses a JSON string into a Javascript object.\n         * @function\n         * @param {String} string\n         * @returns {Object}\n         */\n        parseJSON: function(string) {\n            $.parseJSON = window.JSON.parse;\n            return $.parseJSON(string);\n        },\n\n        /**\n         * Reports whether the image format is supported for tiling in this\n         * version.\n         * @function\n         * @param {String} [extension]\n         * @returns {Boolean}\n         */\n        imageFormatSupported: function( extension ) {\n            extension = extension ? extension : \"\";\n            // eslint-disable-next-line no-use-before-define\n            return !!FILEFORMATS[ extension.toLowerCase() ];\n        },\n\n        /**\n         * Updates supported image formats with user-specified values.\n         * Preexisting formats that are not being updated are left unchanged.\n         * By default, the defined formats are\n         * <pre><code>{\n         *      bmp:  false,\n         *      jpeg: true,\n         *      jpg:  true,\n         *      png:  true,\n         *      tif:  false,\n         *      wdp:  false\n         * }\n         * </code></pre>\n         * @function\n         * @example\n         * // sets webp as supported and png as unsupported\n         * setImageFormatsSupported({webp: true, png: false});\n         * @param {Object} formats An object containing format extensions as\n         * keys and booleans as values.\n         */\n        setImageFormatsSupported: function(formats) {\n            // eslint-disable-next-line no-use-before-define\n            $.extend(FILEFORMATS, formats);\n        }\n\n    });\n\n\n    //TODO: $.console is often used inside a try/catch block which generally\n    //      prevents allowings errors to occur with detection until a debugger\n    //      is attached.  Although I've been guilty of the same anti-pattern\n    //      I eventually was convinced that errors should naturally propagate in\n    //      all but the most special cases.\n    /**\n     * A convenient alias for console when available, and a simple null\n     * function when console is unavailable.\n     * @static\n     * @private\n     */\n    var nullfunction = function( msg ){\n        //document.location.hash = msg;\n    };\n\n    $.console = window.console || {\n        log:    nullfunction,\n        debug:  nullfunction,\n        info:   nullfunction,\n        warn:   nullfunction,\n        error:  nullfunction,\n        assert: nullfunction\n    };\n\n\n    /**\n     * The current browser vendor, version, and related information regarding detected features.\n     * @member {Object} Browser\n     * @memberof OpenSeadragon\n     * @static\n     * @type {Object}\n     * @property {OpenSeadragon.BROWSERS} vendor - One of the {@link OpenSeadragon.BROWSERS} enumeration values.\n     * @property {Number} version\n     * @property {Boolean} alpha - Does the browser support image alpha transparency.\n     */\n    $.Browser = {\n        vendor:     $.BROWSERS.UNKNOWN,\n        version:    0,\n        alpha:      true\n    };\n\n\n    var FILEFORMATS = {\n            bmp:  false,\n            jpeg: true,\n            jpg:  true,\n            png:  true,\n            tif:  false,\n            wdp:  false\n        },\n        URLPARAMS = {};\n\n    (function() {\n        //A small auto-executing routine to determine the browser vendor,\n        //version and supporting feature sets.\n        var ver = navigator.appVersion,\n            ua  = navigator.userAgent,\n            regex;\n\n        //console.error( 'appName: ' + navigator.appName );\n        //console.error( 'appVersion: ' + navigator.appVersion );\n        //console.error( 'userAgent: ' + navigator.userAgent );\n\n        switch( navigator.appName ){\n            case \"Microsoft Internet Explorer\":\n                if( !!window.attachEvent &&\n                    !!window.ActiveXObject ) {\n\n                    $.Browser.vendor = $.BROWSERS.IE;\n                    $.Browser.version = parseFloat(\n                        ua.substring(\n                            ua.indexOf( \"MSIE\" ) + 5,\n                            ua.indexOf( \";\", ua.indexOf( \"MSIE\" ) ) )\n                        );\n                }\n                break;\n            case \"Netscape\":\n                if (window.addEventListener) {\n                    if ( ua.indexOf( \"Edge\" ) >= 0 ) {\n                        $.Browser.vendor = $.BROWSERS.EDGE;\n                        $.Browser.version = parseFloat(\n                            ua.substring( ua.indexOf( \"Edge\" ) + 5 )\n                        );\n                    } else if ( ua.indexOf( \"Edg\" ) >= 0 ) {\n                        $.Browser.vendor = $.BROWSERS.CHROMEEDGE;\n                        $.Browser.version = parseFloat(\n                            ua.substring( ua.indexOf( \"Edg\" ) + 4 )\n                        );\n                    } else if ( ua.indexOf( \"Firefox\" ) >= 0 ) {\n                        $.Browser.vendor = $.BROWSERS.FIREFOX;\n                        $.Browser.version = parseFloat(\n                            ua.substring( ua.indexOf( \"Firefox\" ) + 8 )\n                        );\n                    } else if ( ua.indexOf( \"Safari\" ) >= 0 ) {\n                        $.Browser.vendor = ua.indexOf( \"Chrome\" ) >= 0 ?\n                            $.BROWSERS.CHROME :\n                            $.BROWSERS.SAFARI;\n                        $.Browser.version = parseFloat(\n                            ua.substring(\n                                ua.substring( 0, ua.indexOf( \"Safari\" ) ).lastIndexOf( \"/\" ) + 1,\n                                ua.indexOf( \"Safari\" )\n                            )\n                        );\n                    } else {\n                        regex = new RegExp( \"Trident/.*rv:([0-9]{1,}[.0-9]{0,})\");\n                        if ( regex.exec( ua ) !== null ) {\n                            $.Browser.vendor = $.BROWSERS.IE;\n                            $.Browser.version = parseFloat( RegExp.$1 );\n                        }\n                    }\n                }\n                break;\n            case \"Opera\":\n                $.Browser.vendor = $.BROWSERS.OPERA;\n                $.Browser.version = parseFloat( ver );\n                break;\n        }\n\n            // ignore '?' portion of query string\n        var query = window.location.search.substring( 1 ),\n            parts = query.split('&'),\n            part,\n            sep,\n            i;\n\n        for ( i = 0; i < parts.length; i++ ) {\n            part = parts[ i ];\n            sep  = part.indexOf( '=' );\n\n            if ( sep > 0 ) {\n                var key = part.substring( 0, sep ),\n                    value = part.substring( sep + 1 );\n                try {\n                    URLPARAMS[ key ] = decodeURIComponent( value );\n                } catch (e) {\n                    $.console.error( \"Ignoring malformed URL parameter: %s=%s\", key, value );\n                }\n            }\n        }\n\n        //determine if this browser supports image alpha transparency\n        $.Browser.alpha = !(\n            $.Browser.vendor === $.BROWSERS.CHROME && $.Browser.version < 2\n        );\n\n        //determine if this browser supports element.style.opacity\n        $.Browser.opacity = true;\n\n        if ( $.Browser.vendor === $.BROWSERS.IE && $.Browser.version < 11 ) {\n            $.console.error('Internet Explorer versions < 11 are not supported by OpenSeadragon');\n        }\n    })();\n\n\n    // Adding support for HTML5's requestAnimationFrame as suggested by acdha.\n    // Implementation taken from matt synder's post here:\n    // http://mattsnider.com/cross-browser-and-legacy-supported-requestframeanimation/\n    (function( w ) {\n\n        // most browsers have an implementation\n        var requestAnimationFrame = w.requestAnimationFrame ||\n            w.mozRequestAnimationFrame ||\n            w.webkitRequestAnimationFrame ||\n            w.msRequestAnimationFrame;\n\n        var cancelAnimationFrame = w.cancelAnimationFrame ||\n            w.mozCancelAnimationFrame ||\n            w.webkitCancelAnimationFrame ||\n            w.msCancelAnimationFrame;\n\n        // polyfill, when necessary\n        if ( requestAnimationFrame && cancelAnimationFrame ) {\n            // We can't assign these window methods directly to $ because they\n            // expect their \"this\" to be \"window\", so we call them in wrappers.\n            $.requestAnimationFrame = function(){\n                return requestAnimationFrame.apply( w, arguments );\n            };\n            $.cancelAnimationFrame = function(){\n                return cancelAnimationFrame.apply( w, arguments );\n            };\n        } else {\n            var aAnimQueue = [],\n                processing = [],\n                iRequestId = 0,\n                iIntervalId;\n\n            // create a mock requestAnimationFrame function\n            $.requestAnimationFrame = function( callback ) {\n                aAnimQueue.push( [ ++iRequestId, callback ] );\n\n                if ( !iIntervalId ) {\n                    iIntervalId = setInterval( function() {\n                        if ( aAnimQueue.length ) {\n                            var time = $.now();\n                            // Process all of the currently outstanding frame\n                            // requests, but none that get added during the\n                            // processing.\n                            // Swap the arrays so we don't have to create a new\n                            // array every frame.\n                            var temp = processing;\n                            processing = aAnimQueue;\n                            aAnimQueue = temp;\n                            while ( processing.length ) {\n                                processing.shift()[ 1 ]( time );\n                            }\n                        } else {\n                            // don't continue the interval, if unnecessary\n                            clearInterval( iIntervalId );\n                            iIntervalId = undefined;\n                        }\n                    }, 1000 / 50);  // estimating support for 50 frames per second\n                }\n\n                return iRequestId;\n            };\n\n            // create a mock cancelAnimationFrame function\n            $.cancelAnimationFrame = function( requestId ) {\n                // find the request ID and remove it\n                var i, j;\n                for ( i = 0, j = aAnimQueue.length; i < j; i += 1 ) {\n                    if ( aAnimQueue[ i ][ 0 ] === requestId ) {\n                        aAnimQueue.splice( i, 1 );\n                        return;\n                    }\n                }\n\n                // If it's not in the queue, it may be in the set we're currently\n                // processing (if cancelAnimationFrame is called from within a\n                // requestAnimationFrame callback).\n                for ( i = 0, j = processing.length; i < j; i += 1 ) {\n                    if ( processing[ i ][ 0 ] === requestId ) {\n                        processing.splice( i, 1 );\n                        return;\n                    }\n                }\n            };\n        }\n    })( window );\n\n    /**\n     * @private\n     * @inner\n     * @function\n     * @param {Element} element\n     * @param {Boolean} [isFixed]\n     * @returns {Element}\n     */\n    function getOffsetParent( element, isFixed ) {\n        if ( isFixed && element !== document.body ) {\n            return document.body;\n        } else {\n            return element.offsetParent;\n        }\n    }\n\n}(OpenSeadragon));\n\n\n// Universal Module Definition, supports CommonJS, AMD and simple script tag\n(function (root, factory) {\n    if (typeof define === 'function' && define.amd) {\n        // expose as amd module\n        define([], factory);\n    } else if (typeof module === 'object' && module.exports) {\n        // expose as commonjs module\n        module.exports = factory();\n    } else {\n        // expose as window.OpenSeadragon\n        root.OpenSeadragon = factory();\n    }\n}(this, function () {\n    return OpenSeadragon;\n}));\n\n/*\n * OpenSeadragon - full-screen support functions\n *\n * Copyright (C) 2009 CodePlex Foundation\n * Copyright (C) 2010-2013 OpenSeadragon contributors\n *\n * Redistribution and use in source and binary forms, with or without\n * modification, are permitted provided that the following conditions are\n * met:\n *\n * - Redistributions of source code must retain the above copyright notice,\n *   this list of conditions and the following disclaimer.\n *\n * - Redistributions in binary form must reproduce the above copyright\n *   notice, this list of conditions and the following disclaimer in the\n *   documentation and/or other materials provided with the distribution.\n *\n * - Neither the name of CodePlex Foundation nor the names of its\n *   contributors may be used to endorse or promote products derived from\n *   this software without specific prior written permission.\n *\n * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS\n * \"AS IS\" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT\n * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR\n * A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT\n * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,\n * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED\n * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR\n * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF\n * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING\n * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS\n * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.\n */\n\n(function( $ ) {\n    /**\n     * Determine native full screen support we can get from the browser.\n     * @member fullScreenApi\n     * @memberof OpenSeadragon\n     * @type {object}\n     * @property {Boolean} supportsFullScreen Return true if full screen API is supported.\n     * @property {Function} isFullScreen Return true if currently in full screen mode.\n     * @property {Function} getFullScreenElement Return the element currently in full screen mode.\n     * @property {Function} requestFullScreen Make a request to go in full screen mode.\n     * @property {Function} exitFullScreen Make a request to exit full screen mode.\n     * @property {Function} cancelFullScreen Deprecated, use exitFullScreen instead.\n     * @property {String} fullScreenEventName Event fired when the full screen mode change.\n     * @property {String} fullScreenErrorEventName Event fired when a request to go\n     * in full screen mode failed.\n     */\n    var fullScreenApi = {\n        supportsFullScreen: false,\n        isFullScreen: function() { return false; },\n        getFullScreenElement: function() { return null; },\n        requestFullScreen: function() {},\n        exitFullScreen: function() {},\n        cancelFullScreen: function() {},\n        fullScreenEventName: '',\n        fullScreenErrorEventName: ''\n    };\n\n    // check for native support\n    if ( document.exitFullscreen ) {\n        // W3C standard\n        fullScreenApi.supportsFullScreen = true;\n        fullScreenApi.getFullScreenElement = function() {\n            return document.fullscreenElement;\n        };\n        fullScreenApi.requestFullScreen = function( element ) {\n            return element.requestFullscreen();\n        };\n        fullScreenApi.exitFullScreen = function() {\n            document.exitFullscreen();\n        };\n        fullScreenApi.fullScreenEventName = \"fullscreenchange\";\n        fullScreenApi.fullScreenErrorEventName = \"fullscreenerror\";\n    } else if ( document.msExitFullscreen ) {\n        // IE 11\n        fullScreenApi.supportsFullScreen = true;\n        fullScreenApi.getFullScreenElement = function() {\n            return document.msFullscreenElement;\n        };\n        fullScreenApi.requestFullScreen = function( element ) {\n            return element.msRequestFullscreen();\n        };\n        fullScreenApi.exitFullScreen = function() {\n            document.msExitFullscreen();\n        };\n        fullScreenApi.fullScreenEventName = \"MSFullscreenChange\";\n        fullScreenApi.fullScreenErrorEventName = \"MSFullscreenError\";\n    } else if ( document.webkitExitFullscreen ) {\n        // Recent webkit\n        fullScreenApi.supportsFullScreen = true;\n        fullScreenApi.getFullScreenElement = function() {\n            return document.webkitFullscreenElement;\n        };\n        fullScreenApi.requestFullScreen = function( element ) {\n            return element.webkitRequestFullscreen();\n        };\n        fullScreenApi.exitFullScreen = function() {\n            document.webkitExitFullscreen();\n        };\n        fullScreenApi.fullScreenEventName = \"webkitfullscreenchange\";\n        fullScreenApi.fullScreenErrorEventName = \"webkitfullscreenerror\";\n    } else if ( document.webkitCancelFullScreen ) {\n        // Old webkit\n        fullScreenApi.supportsFullScreen = true;\n        fullScreenApi.getFullScreenElement = function() {\n            return document.webkitCurrentFullScreenElement;\n        };\n        fullScreenApi.requestFullScreen = function( element ) {\n            return element.webkitRequestFullScreen();\n        };\n        fullScreenApi.exitFullScreen = function() {\n            document.webkitCancelFullScreen();\n        };\n        fullScreenApi.fullScreenEventName = \"webkitfullscreenchange\";\n        fullScreenApi.fullScreenErrorEventName = \"webkitfullscreenerror\";\n    } else if ( document.mozCancelFullScreen ) {\n        // Firefox\n        fullScreenApi.supportsFullScreen = true;\n        fullScreenApi.getFullScreenElement = function() {\n            return document.mozFullScreenElement;\n        };\n        fullScreenApi.requestFullScreen = function( element ) {\n            return element.mozRequestFullScreen();\n        };\n        fullScreenApi.exitFullScreen = function() {\n            document.mozCancelFullScreen();\n        };\n        fullScreenApi.fullScreenEventName = \"mozfullscreenchange\";\n        fullScreenApi.fullScreenErrorEventName = \"mozfullscreenerror\";\n    }\n    fullScreenApi.isFullScreen = function() {\n        return fullScreenApi.getFullScreenElement() !== null;\n    };\n    fullScreenApi.cancelFullScreen = function() {\n        $.console.error(\"cancelFullScreen is deprecated. Use exitFullScreen instead.\");\n        fullScreenApi.exitFullScreen();\n    };\n\n    // export api\n    $.extend( $, fullScreenApi );\n\n})( OpenSeadragon );\n\n/*\n * OpenSeadragon - EventSource\n *\n * Copyright (C) 2009 CodePlex Foundation\n * Copyright (C) 2010-2013 OpenSeadragon contributors\n *\n * Redistribution and use in source and binary forms, with or without\n * modification, are permitted provided that the following conditions are\n * met:\n *\n * - Redistributions of source code must retain the above copyright notice,\n *   this list of conditions and the following disclaimer.\n *\n * - Redistributions in binary form must reproduce the above copyright\n *   notice, this list of conditions and the following disclaimer in the\n *   documentation and/or other materials provided with the distribution.\n *\n * - Neither the name of CodePlex Foundation nor the names of its\n *   contributors may be used to endorse or promote products derived from\n *   this software without specific prior written permission.\n *\n * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS\n * \"AS IS\" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT\n * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR\n * A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT\n * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,\n * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED\n * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR\n * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF\n * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING\n * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS\n * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.\n */\n\n(function($){\n\n/**\n * Event handler method signature used by all OpenSeadragon events.\n *\n * @callback EventHandler\n * @memberof OpenSeadragon\n * @param {Object} event - See individual events for event-specific properties.\n */\n\n\n/**\n * @class EventSource\n * @classdesc For use by classes which want to support custom, non-browser events.\n *\n * @memberof OpenSeadragon\n */\n$.EventSource = function() {\n    this.events = {};\n};\n\n/** @lends OpenSeadragon.EventSource.prototype */\n$.EventSource.prototype = {\n\n    /**\n     * Add an event handler to be triggered only once (or a given number of times)\n     * for a given event.\n     * @function\n     * @param {String} eventName - Name of event to register.\n     * @param {OpenSeadragon.EventHandler} handler - Function to call when event\n     * is triggered.\n     * @param {Object} [userData=null] - Arbitrary object to be passed unchanged\n     * to the handler.\n     * @param {Number} [times=1] - The number of times to handle the event\n     * before removing it.\n     */\n    addOnceHandler: function(eventName, handler, userData, times) {\n        var self = this;\n        times = times || 1;\n        var count = 0;\n        var onceHandler = function(event) {\n            count++;\n            if (count === times) {\n                self.removeHandler(eventName, onceHandler);\n            }\n            handler(event);\n        };\n        this.addHandler(eventName, onceHandler, userData);\n    },\n\n    /**\n     * Add an event handler for a given event.\n     * @function\n     * @param {String} eventName - Name of event to register.\n     * @param {OpenSeadragon.EventHandler} handler - Function to call when event is triggered.\n     * @param {Object} [userData=null] - Arbitrary object to be passed unchanged to the handler.\n     */\n    addHandler: function ( eventName, handler, userData ) {\n        var events = this.events[ eventName ];\n        if ( !events ) {\n            this.events[ eventName ] = events = [];\n        }\n        if ( handler && $.isFunction( handler ) ) {\n            events[ events.length ] = { handler: handler, userData: userData || null };\n        }\n    },\n\n    /**\n     * Remove a specific event handler for a given event.\n     * @function\n     * @param {String} eventName - Name of event for which the handler is to be removed.\n     * @param {OpenSeadragon.EventHandler} handler - Function to be removed.\n     */\n    removeHandler: function ( eventName, handler ) {\n        var events = this.events[ eventName ],\n            handlers = [],\n            i;\n        if ( !events ) {\n            return;\n        }\n        if ( $.isArray( events ) ) {\n            for ( i = 0; i < events.length; i++ ) {\n                if ( events[i].handler !== handler ) {\n                    handlers.push( events[ i ] );\n                }\n            }\n            this.events[ eventName ] = handlers;\n        }\n    },\n\n    /**\n     * Get the amount of handlers registered for a given event.\n     * @param {String} eventName - Name of event to inspect.\n     * @return {number} amount of events\n     */\n    numberOfHandlers: function (eventName) {\n        var events = this.events[ eventName ];\n        if ( !events ) {\n            return 0;\n        }\n        return events.length;\n    },\n\n    /**\n     * Remove all event handlers for a given event type. If no type is given all\n     * event handlers for every event type are removed.\n     * @function\n     * @param {String} eventName - Name of event for which all handlers are to be removed.\n     */\n    removeAllHandlers: function( eventName ) {\n        if ( eventName ){\n            this.events[ eventName ] = [];\n        } else{\n            for ( var eventType in this.events ) {\n                this.events[ eventType ] = [];\n            }\n        }\n    },\n\n    /**\n     * Get a function which iterates the list of all handlers registered for a given event, calling the handler for each.\n     * @function\n     * @param {String} eventName - Name of event to get handlers for.\n     */\n    getHandler: function ( eventName ) {\n        var events = this.events[ eventName ];\n        if ( !events || !events.length ) {\n            return null;\n        }\n        events = events.length === 1 ?\n            [ events[ 0 ] ] :\n            Array.apply( null, events );\n        return function ( source, args ) {\n            var i,\n                length = events.length;\n            for ( i = 0; i < length; i++ ) {\n                if ( events[ i ] ) {\n                    args.eventSource = source;\n                    args.userData = events[ i ].userData;\n                    events[ i ].handler( args );\n                }\n            }\n        };\n    },\n\n    /**\n     * Trigger an event, optionally passing additional information.\n     * @function\n     * @param {String} eventName - Name of event to register.\n     * @param {Object} eventArgs - Event-specific data.\n     */\n    raiseEvent: function( eventName, eventArgs ) {\n        //uncomment if you want to get a log of all events\n        //$.console.log( eventName );\n        var handler = this.getHandler( eventName );\n\n        if ( handler ) {\n            if ( !eventArgs ) {\n                eventArgs = {};\n            }\n\n            handler( this, eventArgs );\n        }\n    }\n};\n\n}( OpenSeadragon ));\n\n/*\n * OpenSeadragon - MouseTracker\n *\n * Copyright (C) 2009 CodePlex Foundation\n * Copyright (C) 2010-2013 OpenSeadragon contributors\n *\n * Redistribution and use in source and binary forms, with or without\n * modification, are permitted provided that the following conditions are\n * met:\n *\n * - Redistributions of source code must retain the above copyright notice,\n *   this list of conditions and the following disclaimer.\n *\n * - Redistributions in binary form must reproduce the above copyright\n *   notice, this list of conditions and the following disclaimer in the\n *   documentation and/or other materials provided with the distribution.\n *\n * - Neither the name of CodePlex Foundation nor the names of its\n *   contributors may be used to endorse or promote products derived from\n *   this software without specific prior written permission.\n *\n * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS\n * \"AS IS\" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT\n * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR\n * A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT\n * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,\n * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED\n * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR\n * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF\n * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING\n * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS\n * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.\n */\n\n(function ( $ ) {\n\n    // All MouseTracker instances\n    var MOUSETRACKERS  = [];\n\n    // dictionary from hash to private properties\n    var THIS           = {};\n\n\n    /**\n     * @class MouseTracker\n     * @classdesc Provides simplified handling of common pointer device (mouse, touch, pen, etc.) gestures\n     *            and keyboard events on a specified element.\n     * @memberof OpenSeadragon\n     * @param {Object} options\n     *      Allows configurable properties to be entirely specified by passing\n     *      an options object to the constructor.  The constructor also supports\n     *      the original positional arguments 'element', 'clickTimeThreshold',\n     *      and 'clickDistThreshold' in that order.\n     * @param {Element|String} options.element\n     *      A reference to an element or an element id for which the pointer/key\n     *      events will be monitored.\n     * @param {Boolean} [options.startDisabled=false]\n     *      If true, event tracking on the element will not start until\n     *      {@link OpenSeadragon.MouseTracker.setTracking|setTracking} is called.\n     * @param {Number} options.clickTimeThreshold\n     *      The number of milliseconds within which a pointer down-up event combination\n     *      will be treated as a click gesture.\n     * @param {Number} options.clickDistThreshold\n     *      The maximum distance allowed between a pointer down event and a pointer up event\n     *      to be treated as a click gesture.\n     * @param {Number} options.dblClickTimeThreshold\n     *      The number of milliseconds within which two pointer down-up event combinations\n     *      will be treated as a double-click gesture.\n     * @param {Number} options.dblClickDistThreshold\n     *      The maximum distance allowed between two pointer click events\n     *      to be treated as a click gesture.\n     * @param {Number} [options.stopDelay=50]\n     *      The number of milliseconds without pointer move before the stop\n     *      event is fired.\n     * @param {OpenSeadragon.EventHandler} [options.preProcessEventHandler=null]\n     *      An optional handler for controlling DOM event propagation and processing.\n     * @param {OpenSeadragon.EventHandler} [options.contextMenuHandler=null]\n     *      An optional handler for contextmenu.\n     * @param {OpenSeadragon.EventHandler} [options.enterHandler=null]\n     *      An optional handler for pointer enter.\n     * @param {OpenSeadragon.EventHandler} [options.leaveHandler=null]\n     *      An optional handler for pointer leave.\n     * @param {OpenSeadragon.EventHandler} [options.exitHandler=null]\n     *      An optional handler for pointer leave. <span style=\"color:red;\">Deprecated. Use leaveHandler instead.</span>\n     * @param {OpenSeadragon.EventHandler} [options.overHandler=null]\n     *      An optional handler for pointer over.\n     * @param {OpenSeadragon.EventHandler} [options.outHandler=null]\n     *      An optional handler for pointer out.\n     * @param {OpenSeadragon.EventHandler} [options.pressHandler=null]\n     *      An optional handler for pointer press.\n     * @param {OpenSeadragon.EventHandler} [options.nonPrimaryPressHandler=null]\n     *      An optional handler for pointer non-primary button press.\n     * @param {OpenSeadragon.EventHandler} [options.releaseHandler=null]\n     *      An optional handler for pointer release.\n     * @param {OpenSeadragon.EventHandler} [options.nonPrimaryReleaseHandler=null]\n     *      An optional handler for pointer non-primary button release.\n     * @param {OpenSeadragon.EventHandler} [options.moveHandler=null]\n     *      An optional handler for pointer move.\n     * @param {OpenSeadragon.EventHandler} [options.scrollHandler=null]\n     *      An optional handler for mouse wheel scroll.\n     * @param {OpenSeadragon.EventHandler} [options.clickHandler=null]\n     *      An optional handler for pointer click.\n     * @param {OpenSeadragon.EventHandler} [options.dblClickHandler=null]\n     *      An optional handler for pointer double-click.\n     * @param {OpenSeadragon.EventHandler} [options.dragHandler=null]\n     *      An optional handler for the drag gesture.\n     * @param {OpenSeadragon.EventHandler} [options.dragEndHandler=null]\n     *      An optional handler for after a drag gesture.\n     * @param {OpenSeadragon.EventHandler} [options.pinchHandler=null]\n     *      An optional handler for the pinch gesture.\n     * @param {OpenSeadragon.EventHandler} [options.keyDownHandler=null]\n     *      An optional handler for keydown.\n     * @param {OpenSeadragon.EventHandler} [options.keyUpHandler=null]\n     *      An optional handler for keyup.\n     * @param {OpenSeadragon.EventHandler} [options.keyHandler=null]\n     *      An optional handler for keypress.\n     * @param {OpenSeadragon.EventHandler} [options.focusHandler=null]\n     *      An optional handler for focus.\n     * @param {OpenSeadragon.EventHandler} [options.blurHandler=null]\n     *      An optional handler for blur.\n     * @param {Object} [options.userData=null]\n     *      Arbitrary object to be passed unchanged to any attached handler methods.\n     */\n    $.MouseTracker = function ( options ) {\n\n        MOUSETRACKERS.push( this );\n\n        var args = arguments;\n\n        if ( !$.isPlainObject( options ) ) {\n            options = {\n                element:            args[ 0 ],\n                clickTimeThreshold: args[ 1 ],\n                clickDistThreshold: args[ 2 ]\n            };\n        }\n\n        this.hash               = Math.random(); // An unique hash for this tracker.\n        /**\n         * The element for which pointer events are being monitored.\n         * @member {Element} element\n         * @memberof OpenSeadragon.MouseTracker#\n         */\n        this.element            = $.getElement( options.element );\n        /**\n         * The number of milliseconds within which a pointer down-up event combination\n         * will be treated as a click gesture.\n         * @member {Number} clickTimeThreshold\n         * @memberof OpenSeadragon.MouseTracker#\n         */\n        this.clickTimeThreshold = options.clickTimeThreshold || $.DEFAULT_SETTINGS.clickTimeThreshold;\n        /**\n         * The maximum distance allowed between a pointer down event and a pointer up event\n         * to be treated as a click gesture.\n         * @member {Number} clickDistThreshold\n         * @memberof OpenSeadragon.MouseTracker#\n         */\n        this.clickDistThreshold = options.clickDistThreshold || $.DEFAULT_SETTINGS.clickDistThreshold;\n        /**\n         * The number of milliseconds within which two pointer down-up event combinations\n         * will be treated as a double-click gesture.\n         * @member {Number} dblClickTimeThreshold\n         * @memberof OpenSeadragon.MouseTracker#\n         */\n        this.dblClickTimeThreshold = options.dblClickTimeThreshold || $.DEFAULT_SETTINGS.dblClickTimeThreshold;\n        /**\n         * The maximum distance allowed between two pointer click events\n         * to be treated as a double-click gesture.\n         * @member {Number} dblClickDistThreshold\n         * @memberof OpenSeadragon.MouseTracker#\n         */\n        this.dblClickDistThreshold = options.dblClickDistThreshold || $.DEFAULT_SETTINGS.dblClickDistThreshold;\n        /*eslint-disable no-multi-spaces*/\n        this.userData              = options.userData          || null;\n        this.stopDelay             = options.stopDelay         || 50;\n\n        this.preProcessEventHandler   = options.preProcessEventHandler   || null;\n        this.contextMenuHandler       = options.contextMenuHandler       || null;\n        this.enterHandler             = options.enterHandler             || null;\n        this.leaveHandler             = options.leaveHandler             || null;\n        this.exitHandler              = options.exitHandler              || null; // Deprecated v2.5.0\n        this.overHandler              = options.overHandler              || null;\n        this.outHandler               = options.outHandler               || null;\n        this.pressHandler             = options.pressHandler             || null;\n        this.nonPrimaryPressHandler   = options.nonPrimaryPressHandler   || null;\n        this.releaseHandler           = options.releaseHandler           || null;\n        this.nonPrimaryReleaseHandler = options.nonPrimaryReleaseHandler || null;\n        this.moveHandler              = options.moveHandler              || null;\n        this.scrollHandler            = options.scrollHandler            || null;\n        this.clickHandler             = options.clickHandler             || null;\n        this.dblClickHandler          = options.dblClickHandler          || null;\n        this.dragHandler              = options.dragHandler              || null;\n        this.dragEndHandler           = options.dragEndHandler           || null;\n        this.pinchHandler             = options.pinchHandler             || null;\n        this.stopHandler              = options.stopHandler              || null;\n        this.keyDownHandler           = options.keyDownHandler           || null;\n        this.keyUpHandler             = options.keyUpHandler             || null;\n        this.keyHandler               = options.keyHandler               || null;\n        this.focusHandler             = options.focusHandler             || null;\n        this.blurHandler              = options.blurHandler              || null;\n        /*eslint-enable no-multi-spaces*/\n\n        //Store private properties in a scope sealed hash map\n        var _this = this;\n\n        /**\n         * @private\n         * @property {Boolean} tracking\n         *      Are we currently tracking pointer events for this element.\n         */\n        THIS[ this.hash ] = {\n            click:                 function ( event ) { onClick( _this, event ); },\n            dblclick:              function ( event ) { onDblClick( _this, event ); },\n            keydown:               function ( event ) { onKeyDown( _this, event ); },\n            keyup:                 function ( event ) { onKeyUp( _this, event ); },\n            keypress:              function ( event ) { onKeyPress( _this, event ); },\n            focus:                 function ( event ) { onFocus( _this, event ); },\n            blur:                  function ( event ) { onBlur( _this, event ); },\n            contextmenu:           function ( event ) { onContextMenu( _this, event ); },\n\n            wheel:                 function ( event ) { onWheel( _this, event ); },\n            mousewheel:            function ( event ) { onMouseWheel( _this, event ); },\n            DOMMouseScroll:        function ( event ) { onMouseWheel( _this, event ); },\n            MozMousePixelScroll:   function ( event ) { onMouseWheel( _this, event ); },\n\n            losecapture:           function ( event ) { onLoseCapture( _this, event ); },\n\n            mouseenter:            function ( event ) { onPointerEnter( _this, event ); },\n            mouseleave:            function ( event ) { onPointerLeave( _this, event ); },\n            mouseover:             function ( event ) { onPointerOver( _this, event ); },\n            mouseout:              function ( event ) { onPointerOut( _this, event ); },\n            mousedown:             function ( event ) { onPointerDown( _this, event ); },\n            mouseup:               function ( event ) { onPointerUp( _this, event ); },\n            mousemove:             function ( event ) { onPointerMove( _this, event ); },\n\n            touchstart:            function ( event ) { onTouchStart( _this, event ); },\n            touchend:              function ( event ) { onTouchEnd( _this, event ); },\n            touchmove:             function ( event ) { onTouchMove( _this, event ); },\n            touchcancel:           function ( event ) { onTouchCancel( _this, event ); },\n\n            gesturestart:          function ( event ) { onGestureStart( _this, event ); }, // Safari/Safari iOS\n            gesturechange:         function ( event ) { onGestureChange( _this, event ); }, // Safari/Safari iOS\n\n            gotpointercapture:     function ( event ) { onGotPointerCapture( _this, event ); },\n            lostpointercapture:    function ( event ) { onLostPointerCapture( _this, event ); },\n            pointerenter:          function ( event ) { onPointerEnter( _this, event ); },\n            pointerleave:          function ( event ) { onPointerLeave( _this, event ); },\n            pointerover:           function ( event ) { onPointerOver( _this, event ); },\n            pointerout:            function ( event ) { onPointerOut( _this, event ); },\n            pointerdown:           function ( event ) { onPointerDown( _this, event ); },\n            pointerup:             function ( event ) { onPointerUp( _this, event ); },\n            pointermove:           function ( event ) { onPointerMove( _this, event ); },\n            pointercancel:         function ( event ) { onPointerCancel( _this, event ); },\n            pointerupcaptured:     function ( event ) { onPointerUpCaptured( _this, event ); },\n            pointermovecaptured:   function ( event ) { onPointerMoveCaptured( _this, event ); },\n\n            tracking:              false,\n\n            // Active pointers lists. Array of GesturePointList objects, one for each pointer device type.\n            // GesturePointList objects are added each time a pointer is tracked by a new pointer device type (see getActivePointersListByType()).\n            // Active pointers are any pointer being tracked for this element which are in the hit-test area\n            //     of the element (for hover-capable devices) and/or have contact or a button press initiated in the element.\n            activePointersLists:   [],\n\n            // Tracking for double-click gesture\n            lastClickPos:          null,\n            dblClickTimeOut:       null,\n\n            // Tracking for pinch gesture\n            pinchGPoints:          [],\n            lastPinchDist:         0,\n            currentPinchDist:      0,\n            lastPinchCenter:       null,\n            currentPinchCenter:    null,\n\n            // Tracking for drag\n            sentDragEvent:         false\n        };\n\n        this.hasGestureHandlers = !!( this.pressHandler || this.nonPrimaryPressHandler ||\n                                this.releaseHandler || this.nonPrimaryReleaseHandler ||\n                                this.clickHandler || this.dblClickHandler ||\n                                this.dragHandler || this.dragEndHandler ||\n                                this.pinchHandler );\n        this.hasScrollHandler = !!this.scrollHandler;\n\n        if ( $.MouseTracker.havePointerEvents ) {\n            $.setElementPointerEvents( this.element, 'auto' );\n        }\n\n        if (this.exitHandler) {\n            $.console.error(\"MouseTracker.exitHandler is deprecated. Use MouseTracker.leaveHandler instead.\");\n        }\n\n        if ( !options.startDisabled ) {\n            this.setTracking( true );\n        }\n    };\n\n    /** @lends OpenSeadragon.MouseTracker.prototype */\n    $.MouseTracker.prototype = {\n\n        /**\n         * Clean up any events or objects created by the tracker.\n         * @function\n         */\n        destroy: function () {\n            var i;\n\n            stopTracking( this );\n            this.element = null;\n\n            for ( i = 0; i < MOUSETRACKERS.length; i++ ) {\n                if ( MOUSETRACKERS[ i ] === this ) {\n                    MOUSETRACKERS.splice( i, 1 );\n                    break;\n                }\n            }\n\n            THIS[ this.hash ] = null;\n            delete THIS[ this.hash ];\n        },\n\n        /**\n         * Are we currently tracking events on this element.\n         * @deprecated Just use this.tracking\n         * @function\n         * @returns {Boolean} Are we currently tracking events on this element.\n         */\n        isTracking: function () {\n            return THIS[ this.hash ].tracking;\n        },\n\n        /**\n         * Enable or disable whether or not we are tracking events on this element.\n         * @function\n         * @param {Boolean} track True to start tracking, false to stop tracking.\n         * @returns {OpenSeadragon.MouseTracker} Chainable.\n         */\n        setTracking: function ( track ) {\n            if ( track ) {\n                startTracking( this );\n            } else {\n                stopTracking( this );\n            }\n            //chain\n            return this;\n        },\n\n        /**\n         * Returns the {@link OpenSeadragon.MouseTracker.GesturePointList|GesturePointList} for the given pointer device type,\n         * creating and caching a new {@link OpenSeadragon.MouseTracker.GesturePointList|GesturePointList} if one doesn't already exist for the type.\n         * @function\n         * @param {String} type - The pointer device type: \"mouse\", \"touch\", \"pen\", etc.\n         * @returns {OpenSeadragon.MouseTracker.GesturePointList}\n         */\n        getActivePointersListByType: function ( type ) {\n            var delegate = THIS[ this.hash ],\n                i,\n                len = delegate.activePointersLists.length,\n                list;\n\n            for ( i = 0; i < len; i++ ) {\n                if ( delegate.activePointersLists[ i ].type === type ) {\n                    return delegate.activePointersLists[ i ];\n                }\n            }\n\n            list = new $.MouseTracker.GesturePointList( type );\n            delegate.activePointersLists.push( list );\n            return list;\n        },\n\n        /**\n         * Returns the total number of pointers currently active on the tracked element.\n         * @function\n         * @returns {Number}\n         */\n        getActivePointerCount: function () {\n            var delegate = THIS[ this.hash ],\n                i,\n                len = delegate.activePointersLists.length,\n                count = 0;\n\n            for ( i = 0; i < len; i++ ) {\n                count += delegate.activePointersLists[ i ].getLength();\n            }\n\n            return count;\n        },\n\n        /**\n         * Implement or assign implementation to these handlers during or after\n         * calling the constructor.\n         * @function\n         * @param {OpenSeadragon.MouseTracker.EventProcessInfo} eventInfo\n         */\n        preProcessEventHandler: function () { },\n\n        /**\n         * Implement or assign implementation to these handlers during or after\n         * calling the constructor.\n         * @function\n         * @param {Object} event\n         * @param {OpenSeadragon.MouseTracker} event.eventSource\n         *      A reference to the tracker instance.\n         * @param {OpenSeadragon.Point} event.position\n         *      The position of the event relative to the tracked element.\n         * @param {Object} event.originalEvent\n         *      The original event object.\n         * @param {Boolean} event.preventDefault\n         *      Set to true to prevent the default user-agent's handling of the contextmenu event.\n         * @param {Object} event.userData\n         *      Arbitrary user-defined object.\n         */\n        contextMenuHandler: function () { },\n\n        /**\n         * Implement or assign implementation to these handlers during or after\n         * calling the constructor.\n         * @function\n         * @param {Object} event\n         * @param {OpenSeadragon.MouseTracker} event.eventSource\n         *      A reference to the tracker instance.\n         * @param {String} event.pointerType\n         *     \"mouse\", \"touch\", \"pen\", etc.\n         * @param {OpenSeadragon.Point} event.position\n         *      The position of the event relative to the tracked element.\n         * @param {Number} event.buttons\n         *      Current buttons pressed.\n         *      Combination of bit flags 0: none, 1: primary (or touch contact), 2: secondary, 4: aux (often middle), 8: X1 (often back), 16: X2 (often forward), 32: pen eraser.\n         * @param {Number} event.pointers\n         *      Number of pointers (all types) active in the tracked element.\n         * @param {Boolean} event.insideElementPressed\n         *      True if the left mouse button is currently being pressed and was\n         *      initiated inside the tracked element, otherwise false.\n         * @param {Boolean} event.buttonDownAny\n         *      Was the button down anywhere in the screen during the event. <span style=\"color:red;\">Deprecated. Use buttons instead.</span>\n         * @param {Boolean} event.isTouchEvent\n         *      True if the original event is a touch event, otherwise false. <span style=\"color:red;\">Deprecated. Use pointerType and/or originalEvent instead.</span>\n         * @param {Object} event.originalEvent\n         *      The original event object.\n         * @param {Object} event.userData\n         *      Arbitrary user-defined object.\n         */\n        enterHandler: function () { },\n\n        /**\n         * Implement or assign implementation to these handlers during or after\n         * calling the constructor.\n         * @function\n         * @since v2.5.0\n         * @param {Object} event\n         * @param {OpenSeadragon.MouseTracker} event.eventSource\n         *      A reference to the tracker instance.\n         * @param {String} event.pointerType\n         *     \"mouse\", \"touch\", \"pen\", etc.\n         * @param {OpenSeadragon.Point} event.position\n         *      The position of the event relative to the tracked element.\n         * @param {Number} event.buttons\n         *      Current buttons pressed.\n         *      Combination of bit flags 0: none, 1: primary (or touch contact), 2: secondary, 4: aux (often middle), 8: X1 (often back), 16: X2 (often forward), 32: pen eraser.\n         * @param {Number} event.pointers\n         *      Number of pointers (all types) active in the tracked element.\n         * @param {Boolean} event.insideElementPressed\n         *      True if the left mouse button is currently being pressed and was\n         *      initiated inside the tracked element, otherwise false.\n         * @param {Boolean} event.buttonDownAny\n         *      Was the button down anywhere in the screen during the event. <span style=\"color:red;\">Deprecated. Use buttons instead.</span>\n         * @param {Boolean} event.isTouchEvent\n         *      True if the original event is a touch event, otherwise false. <span style=\"color:red;\">Deprecated. Use pointerType and/or originalEvent instead.</span>\n         * @param {Object} event.originalEvent\n         *      The original event object.\n         * @param {Object} event.userData\n         *      Arbitrary user-defined object.\n         */\n        leaveHandler: function () { },\n\n        /**\n         * Implement or assign implementation to these handlers during or after\n         * calling the constructor.\n         * @function\n         * @deprecated v2.5.0 Use leaveHandler instead\n         * @param {Object} event\n         * @param {OpenSeadragon.MouseTracker} event.eventSource\n         *      A reference to the tracker instance.\n         * @param {String} event.pointerType\n         *     \"mouse\", \"touch\", \"pen\", etc.\n         * @param {OpenSeadragon.Point} event.position\n         *      The position of the event relative to the tracked element.\n         * @param {Number} event.buttons\n         *      Current buttons pressed.\n         *      Combination of bit flags 0: none, 1: primary (or touch contact), 2: secondary, 4: aux (often middle), 8: X1 (often back), 16: X2 (often forward), 32: pen eraser.\n         * @param {Number} event.pointers\n         *      Number of pointers (all types) active in the tracked element.\n         * @param {Boolean} event.insideElementPressed\n         *      True if the left mouse button is currently being pressed and was\n         *      initiated inside the tracked element, otherwise false.\n         * @param {Boolean} event.buttonDownAny\n         *      Was the button down anywhere in the screen during the event. <span style=\"color:red;\">Deprecated. Use buttons instead.</span>\n         * @param {Boolean} event.isTouchEvent\n         *      True if the original event is a touch event, otherwise false. <span style=\"color:red;\">Deprecated. Use pointerType and/or originalEvent instead.</span>\n         * @param {Object} event.originalEvent\n         *      The original event object.\n         * @param {Object} event.userData\n         *      Arbitrary user-defined object.\n         */\n        exitHandler: function () { },\n\n        /**\n         * Implement or assign implementation to these handlers during or after\n         * calling the constructor.\n         * @function\n         * @since v2.5.0\n         * @param {Object} event\n         * @param {OpenSeadragon.MouseTracker} event.eventSource\n         *      A reference to the tracker instance.\n         * @param {String} event.pointerType\n         *     \"mouse\", \"touch\", \"pen\", etc.\n         * @param {OpenSeadragon.Point} event.position\n         *      The position of the event relative to the tracked element.\n         * @param {Number} event.buttons\n         *      Current buttons pressed.\n         *      Combination of bit flags 0: none, 1: primary (or touch contact), 2: secondary, 4: aux (often middle), 8: X1 (often back), 16: X2 (often forward), 32: pen eraser.\n         * @param {Number} event.pointers\n         *      Number of pointers (all types) active in the tracked element.\n         * @param {Boolean} event.insideElementPressed\n         *      True if the left mouse button is currently being pressed and was\n         *      initiated inside the tracked element, otherwise false.\n         * @param {Boolean} event.buttonDownAny\n         *      Was the button down anywhere in the screen during the event. <span style=\"color:red;\">Deprecated. Use buttons instead.</span>\n         * @param {Boolean} event.isTouchEvent\n         *      True if the original event is a touch event, otherwise false. <span style=\"color:red;\">Deprecated. Use pointerType and/or originalEvent instead.</span>\n         * @param {Object} event.originalEvent\n         *      The original event object.\n         * @param {Object} event.userData\n         *      Arbitrary user-defined object.\n         */\n        overHandler: function () { },\n\n        /**\n         * Implement or assign implementation to these handlers during or after\n         * calling the constructor.\n         * @function\n         * @since v2.5.0\n         * @param {Object} event\n         * @param {OpenSeadragon.MouseTracker} event.eventSource\n         *      A reference to the tracker instance.\n         * @param {String} event.pointerType\n         *     \"mouse\", \"touch\", \"pen\", etc.\n         * @param {OpenSeadragon.Point} event.position\n         *      The position of the event relative to the tracked element.\n         * @param {Number} event.buttons\n         *      Current buttons pressed.\n         *      Combination of bit flags 0: none, 1: primary (or touch contact), 2: secondary, 4: aux (often middle), 8: X1 (often back), 16: X2 (often forward), 32: pen eraser.\n         * @param {Number} event.pointers\n         *      Number of pointers (all types) active in the tracked element.\n         * @param {Boolean} event.insideElementPressed\n         *      True if the left mouse button is currently being pressed and was\n         *      initiated inside the tracked element, otherwise false.\n         * @param {Boolean} event.buttonDownAny\n         *      Was the button down anywhere in the screen during the event. <span style=\"color:red;\">Deprecated. Use buttons instead.</span>\n         * @param {Boolean} event.isTouchEvent\n         *      True if the original event is a touch event, otherwise false. <span style=\"color:red;\">Deprecated. Use pointerType and/or originalEvent instead.</span>\n         * @param {Object} event.originalEvent\n         *      The original event object.\n         * @param {Object} event.userData\n         *      Arbitrary user-defined object.\n         */\n        outHandler: function () { },\n\n        /**\n         * Implement or assign implementation to these handlers during or after\n         * calling the constructor.\n         * @function\n         * @param {Object} event\n         * @param {OpenSeadragon.MouseTracker} event.eventSource\n         *      A reference to the tracker instance.\n         * @param {String} event.pointerType\n         *     \"mouse\", \"touch\", \"pen\", etc.\n         * @param {OpenSeadragon.Point} event.position\n         *      The position of the event relative to the tracked element.\n         * @param {Number} event.buttons\n         *      Current buttons pressed.\n         *      Combination of bit flags 0: none, 1: primary (or touch contact), 2: secondary, 4: aux (often middle), 8: X1 (often back), 16: X2 (often forward), 32: pen eraser.\n         * @param {Boolean} event.isTouchEvent\n         *      True if the original event is a touch event, otherwise false. <span style=\"color:red;\">Deprecated. Use pointerType and/or originalEvent instead.</span>\n         * @param {Object} event.originalEvent\n         *      The original event object.\n         * @param {Object} event.userData\n         *      Arbitrary user-defined object.\n         */\n        pressHandler: function () { },\n\n        /**\n         * Implement or assign implementation to these handlers during or after\n         * calling the constructor.\n         * @function\n         * @param {Object} event\n         * @param {OpenSeadragon.MouseTracker} event.eventSource\n         *      A reference to the tracker instance.\n         * @param {String} event.pointerType\n         *     \"mouse\", \"touch\", \"pen\", etc.\n         * @param {OpenSeadragon.Point} event.position\n         *      The position of the event relative to the tracked element.\n         * @param {Number} event.button\n         *      Button which caused the event.\n         *      -1: none, 0: primary/left, 1: aux/middle, 2: secondary/right, 3: X1/back, 4: X2/forward, 5: pen eraser.\n         * @param {Number} event.buttons\n         *      Current buttons pressed.\n         *      Combination of bit flags 0: none, 1: primary (or touch contact), 2: secondary, 4: aux (often middle), 8: X1 (often back), 16: X2 (often forward), 32: pen eraser.\n         * @param {Boolean} event.isTouchEvent\n         *      True if the original event is a touch event, otherwise false. <span style=\"color:red;\">Deprecated. Use pointerType and/or originalEvent instead.</span>\n         * @param {Object} event.originalEvent\n         *      The original event object.\n         * @param {Object} event.userData\n         *      Arbitrary user-defined object.\n         */\n        nonPrimaryPressHandler: function () { },\n\n        /**\n         * Implement or assign implementation to these handlers during or after\n         * calling the constructor.\n         * @function\n         * @param {Object} event\n         * @param {OpenSeadragon.MouseTracker} event.eventSource\n         *      A reference to the tracker instance.\n         * @param {String} event.pointerType\n         *     \"mouse\", \"touch\", \"pen\", etc.\n         * @param {OpenSeadragon.Point} event.position\n         *      The position of the event relative to the tracked element.\n         * @param {Number} event.buttons\n         *      Current buttons pressed.\n         *      Combination of bit flags 0: none, 1: primary (or touch contact), 2: secondary, 4: aux (often middle), 8: X1 (often back), 16: X2 (often forward), 32: pen eraser.\n         * @param {Boolean} event.insideElementPressed\n         *      True if the left mouse button is currently being pressed and was\n         *      initiated inside the tracked element, otherwise false.\n         * @param {Boolean} event.insideElementReleased\n         *      True if the cursor inside the tracked element when the button was released.\n         * @param {Boolean} event.isTouchEvent\n         *      True if the original event is a touch event, otherwise false. <span style=\"color:red;\">Deprecated. Use pointerType and/or originalEvent instead.</span>\n         * @param {Object} event.originalEvent\n         *      The original event object.\n         * @param {Object} event.userData\n         *      Arbitrary user-defined object.\n         */\n        releaseHandler: function () { },\n\n        /**\n         * Implement or assign implementation to these handlers during or after\n         * calling the constructor.\n         * @function\n         * @param {Object} event\n         * @param {OpenSeadragon.MouseTracker} event.eventSource\n         *      A reference to the tracker instance.\n         * @param {String} event.pointerType\n         *     \"mouse\", \"touch\", \"pen\", etc.\n         * @param {OpenSeadragon.Point} event.position\n         *      The position of the event relative to the tracked element.\n         * @param {Number} event.button\n         *      Button which caused the event.\n         *      -1: none, 0: primary/left, 1: aux/middle, 2: secondary/right, 3: X1/back, 4: X2/forward, 5: pen eraser.\n         * @param {Number} event.buttons\n         *      Current buttons pressed.\n         *      Combination of bit flags 0: none, 1: primary (or touch contact), 2: secondary, 4: aux (often middle), 8: X1 (often back), 16: X2 (often forward), 32: pen eraser.\n         * @param {Boolean} event.isTouchEvent\n         *      True if the original event is a touch event, otherwise false. <span style=\"color:red;\">Deprecated. Use pointerType and/or originalEvent instead.</span>\n         * @param {Object} event.originalEvent\n         *      The original event object.\n         * @param {Object} event.userData\n         *      Arbitrary user-defined object.\n         */\n        nonPrimaryReleaseHandler: function () { },\n\n        /**\n         * Implement or assign implementation to these handlers during or after\n         * calling the constructor.\n         * @function\n         * @param {Object} event\n         * @param {OpenSeadragon.MouseTracker} event.eventSource\n         *      A reference to the tracker instance.\n         * @param {String} event.pointerType\n         *     \"mouse\", \"touch\", \"pen\", etc.\n         * @param {OpenSeadragon.Point} event.position\n         *      The position of the event relative to the tracked element.\n         * @param {Number} event.buttons\n         *      Current buttons pressed.\n         *      Combination of bit flags 0: none, 1: primary (or touch contact), 2: secondary, 4: aux (often middle), 8: X1 (often back), 16: X2 (often forward), 32: pen eraser.\n         * @param {Boolean} event.isTouchEvent\n         *      True if the original event is a touch event, otherwise false. <span style=\"color:red;\">Deprecated. Use pointerType and/or originalEvent instead.</span>\n         * @param {Object} event.originalEvent\n         *      The original event object.\n         * @param {Object} event.userData\n         *      Arbitrary user-defined object.\n         */\n        moveHandler: function () { },\n\n        /**\n         * Implement or assign implementation to these handlers during or after\n         * calling the constructor.\n         * @function\n         * @param {Object} event\n         * @param {OpenSeadragon.MouseTracker} event.eventSource\n         *      A reference to the tracker instance.\n         * @param {String} event.pointerType\n         *     \"mouse\", \"touch\", \"pen\", etc.\n         * @param {OpenSeadragon.Point} event.position\n         *      The position of the event relative to the tracked element.\n         * @param {Number} event.scroll\n         *      The scroll delta for the event.\n         * @param {Boolean} event.shift\n         *      True if the shift key was pressed during this event.\n         * @param {Boolean} event.isTouchEvent\n         *      True if the original event is a touch event, otherwise false. <span style=\"color:red;\">Deprecated. Use pointerType and/or originalEvent instead. Touch devices no longer generate scroll event.</span>\n         * @param {Object} event.originalEvent\n         *      The original event object.\n         * @param {Boolean} event.preventDefault\n         *      Set to true to prevent the default user-agent's handling of the wheel event.\n         * @param {Object} event.userData\n         *      Arbitrary user-defined object.\n         */\n        scrollHandler: function () { },\n\n        /**\n         * Implement or assign implementation to these handlers during or after\n         * calling the constructor.\n         * @function\n         * @param {Object} event\n         * @param {OpenSeadragon.MouseTracker} event.eventSource\n         *      A reference to the tracker instance.\n         * @param {String} event.pointerType\n         *     \"mouse\", \"touch\", \"pen\", etc.\n         * @param {OpenSeadragon.Point} event.position\n         *      The position of the event relative to the tracked element.\n         * @param {Boolean} event.quick\n         *      True only if the clickDistThreshold and clickTimeThreshold are both passed. Useful for ignoring drag events.\n         * @param {Boolean} event.shift\n         *      True if the shift key was pressed during this event.\n         * @param {Boolean} event.isTouchEvent\n         *      True if the original event is a touch event, otherwise false. <span style=\"color:red;\">Deprecated. Use pointerType and/or originalEvent instead.</span>\n         * @param {Object} event.originalEvent\n         *      The original event object.\n         * @param {Element} event.originalTarget\n         *      The DOM element clicked on.\n         * @param {Object} event.userData\n         *      Arbitrary user-defined object.\n         */\n        clickHandler: function () { },\n\n        /**\n         * Implement or assign implementation to these handlers during or after\n         * calling the constructor.\n         * @function\n         * @param {Object} event\n         * @param {OpenSeadragon.MouseTracker} event.eventSource\n         *      A reference to the tracker instance.\n         * @param {String} event.pointerType\n         *     \"mouse\", \"touch\", \"pen\", etc.\n         * @param {OpenSeadragon.Point} event.position\n         *      The position of the event relative to the tracked element.\n         * @param {Boolean} event.shift\n         *      True if the shift key was pressed during this event.\n         * @param {Boolean} event.isTouchEvent\n         *      True if the original event is a touch event, otherwise false. <span style=\"color:red;\">Deprecated. Use pointerType and/or originalEvent instead.</span>\n         * @param {Object} event.originalEvent\n         *      The original event object.\n         * @param {Object} event.userData\n         *      Arbitrary user-defined object.\n         */\n        dblClickHandler: function () { },\n\n        /**\n         * Implement or assign implementation to these handlers during or after\n         * calling the constructor.\n         * @function\n         * @param {Object} event\n         * @param {OpenSeadragon.MouseTracker} event.eventSource\n         *      A reference to the tracker instance.\n         * @param {String} event.pointerType\n         *     \"mouse\", \"touch\", \"pen\", etc.\n         * @param {OpenSeadragon.Point} event.position\n         *      The position of the event relative to the tracked element.\n         * @param {Number} event.buttons\n         *      Current buttons pressed.\n         *      Combination of bit flags 0: none, 1: primary (or touch contact), 2: secondary, 4: aux (often middle), 8: X1 (often back), 16: X2 (often forward), 32: pen eraser.\n         * @param {OpenSeadragon.Point} event.delta\n         *      The x,y components of the difference between the current position and the last drag event position.  Useful for ignoring or weighting the events.\n         * @param {Number} event.speed\n         *     Current computed speed, in pixels per second.\n         * @param {Number} event.direction\n         *     Current computed direction, expressed as an angle counterclockwise relative to the positive X axis (-pi to pi, in radians). Only valid if speed > 0.\n         * @param {Boolean} event.shift\n         *      True if the shift key was pressed during this event.\n         * @param {Boolean} event.isTouchEvent\n         *      True if the original event is a touch event, otherwise false. <span style=\"color:red;\">Deprecated. Use pointerType and/or originalEvent instead.</span>\n         * @param {Object} event.originalEvent\n         *      The original event object.\n         * @param {Object} event.userData\n         *      Arbitrary user-defined object.\n         */\n        dragHandler: function () { },\n\n        /**\n         * Implement or assign implementation to these handlers during or after\n         * calling the constructor.\n         * @function\n         * @param {Object} event\n         * @param {OpenSeadragon.MouseTracker} event.eventSource\n         *      A reference to the tracker instance.\n         * @param {String} event.pointerType\n         *     \"mouse\", \"touch\", \"pen\", etc.\n         * @param {OpenSeadragon.Point} event.position\n         *      The position of the event relative to the tracked element.\n         * @param {Number} event.speed\n         *     Speed at the end of a drag gesture, in pixels per second.\n         * @param {Number} event.direction\n         *     Direction at the end of a drag gesture, expressed as an angle counterclockwise relative to the positive X axis (-pi to pi, in radians). Only valid if speed > 0.\n         * @param {Boolean} event.shift\n         *      True if the shift key was pressed during this event.\n         * @param {Boolean} event.isTouchEvent\n         *      True if the original event is a touch event, otherwise false. <span style=\"color:red;\">Deprecated. Use pointerType and/or originalEvent instead.</span>\n         * @param {Object} event.originalEvent\n         *      The original event object.\n         * @param {Object} event.userData\n         *      Arbitrary user-defined object.\n         */\n        dragEndHandler: function () { },\n\n        /**\n         * Implement or assign implementation to these handlers during or after\n         * calling the constructor.\n         * @function\n         * @param {Object} event\n         * @param {OpenSeadragon.MouseTracker} event.eventSource\n         *      A reference to the tracker instance.\n         * @param {String} event.pointerType\n         *     \"mouse\", \"touch\", \"pen\", etc.\n         * @param {Array.<OpenSeadragon.MouseTracker.GesturePoint>} event.gesturePoints\n         *      Gesture points associated with the gesture. Velocity data can be found here.\n         * @param {OpenSeadragon.Point} event.lastCenter\n         *      The previous center point of the two pinch contact points relative to the tracked element.\n         * @param {OpenSeadragon.Point} event.center\n         *      The center point of the two pinch contact points relative to the tracked element.\n         * @param {Number} event.lastDistance\n         *      The previous distance between the two pinch contact points in CSS pixels.\n         * @param {Number} event.distance\n         *      The distance between the two pinch contact points in CSS pixels.\n         * @param {Boolean} event.shift\n         *      True if the shift key was pressed during this event.\n         * @param {Object} event.originalEvent\n         *      The original event object.\n         * @param {Object} event.userData\n         *      Arbitrary user-defined object.\n         */\n        pinchHandler: function () { },\n\n        /**\n         * Implement or assign implementation to these handlers during or after\n         * calling the constructor.\n         * @function\n         * @param {Object} event\n         * @param {OpenSeadragon.MouseTracker} event.eventSource\n         *      A reference to the tracker instance.\n         * @param {String} event.pointerType\n         *     \"mouse\", \"touch\", \"pen\", etc.\n         * @param {OpenSeadragon.Point} event.position\n         *      The position of the event relative to the tracked element.\n         * @param {Number} event.buttons\n         *      Current buttons pressed.\n         *      Combination of bit flags 0: none, 1: primary (or touch contact), 2: secondary, 4: aux (often middle), 8: X1 (often back), 16: X2 (often forward), 32: pen eraser.\n         * @param {Boolean} event.isTouchEvent\n         *      True if the original event is a touch event, otherwise false. <span style=\"color:red;\">Deprecated. Use pointerType and/or originalEvent instead.</span>\n         * @param {Object} event.originalEvent\n         *      The original event object.\n         * @param {Object} event.userData\n         *      Arbitrary user-defined object.\n         */\n        stopHandler: function () { },\n\n        /**\n         * Implement or assign implementation to these handlers during or after\n         * calling the constructor.\n         * @function\n         * @param {Object} event\n         * @param {OpenSeadragon.MouseTracker} event.eventSource\n         *      A reference to the tracker instance.\n         * @param {Number} event.keyCode\n         *      The key code that was pressed.\n         * @param {Boolean} event.ctrl\n         *      True if the ctrl key was pressed during this event.\n         * @param {Boolean} event.shift\n         *      True if the shift key was pressed during this event.\n         * @param {Boolean} event.alt\n         *      True if the alt key was pressed during this event.\n         * @param {Boolean} event.meta\n         *      True if the meta key was pressed during this event.\n         * @param {Object} event.originalEvent\n         *      The original event object.\n         * @param {Boolean} event.preventDefault\n         *      Set to true to prevent the default user-agent's handling of the keydown event.\n         * @param {Object} event.userData\n         *      Arbitrary user-defined object.\n         */\n        keyDownHandler: function () { },\n\n        /**\n         * Implement or assign implementation to these handlers during or after\n         * calling the constructor.\n         * @function\n         * @param {Object} event\n         * @param {OpenSeadragon.MouseTracker} event.eventSource\n         *      A reference to the tracker instance.\n         * @param {Number} event.keyCode\n         *      The key code that was pressed.\n         * @param {Boolean} event.ctrl\n         *      True if the ctrl key was pressed during this event.\n         * @param {Boolean} event.shift\n         *      True if the shift key was pressed during this event.\n         * @param {Boolean} event.alt\n         *      True if the alt key was pressed during this event.\n         * @param {Boolean} event.meta\n         *      True if the meta key was pressed during this event.\n         * @param {Object} event.originalEvent\n         *      The original event object.\n         * @param {Boolean} event.preventDefault\n         *      Set to true to prevent the default user-agent's handling of the keyup event.\n         * @param {Object} event.userData\n         *      Arbitrary user-defined object.\n         */\n        keyUpHandler: function () { },\n\n        /**\n         * Implement or assign implementation to these handlers during or after\n         * calling the constructor.\n         * @function\n         * @param {Object} event\n         * @param {OpenSeadragon.MouseTracker} event.eventSource\n         *      A reference to the tracker instance.\n         * @param {Number} event.keyCode\n         *      The key code that was pressed.\n         * @param {Boolean} event.ctrl\n         *      True if the ctrl key was pressed during this event.\n         * @param {Boolean} event.shift\n         *      True if the shift key was pressed during this event.\n         * @param {Boolean} event.alt\n         *      True if the alt key was pressed during this event.\n         * @param {Boolean} event.meta\n         *      True if the meta key was pressed during this event.\n         * @param {Object} event.originalEvent\n         *      The original event object.\n         * @param {Boolean} event.preventDefault\n         *      Set to true to prevent the default user-agent's handling of the keypress event.\n         * @param {Object} event.userData\n         *      Arbitrary user-defined object.\n         */\n        keyHandler: function () { },\n\n        /**\n         * Implement or assign implementation to these handlers during or after\n         * calling the constructor.\n         * @function\n         * @param {Object} event\n         * @param {OpenSeadragon.MouseTracker} event.eventSource\n         *      A reference to the tracker instance.\n         * @param {Object} event.originalEvent\n         *      The original event object.\n         * @param {Object} event.userData\n         *      Arbitrary user-defined object.\n         */\n        focusHandler: function () { },\n\n        /**\n         * Implement or assign implementation to these handlers during or after\n         * calling the constructor.\n         * @function\n         * @param {Object} event\n         * @param {OpenSeadragon.MouseTracker} event.eventSource\n         *      A reference to the tracker instance.\n         * @param {Object} event.originalEvent\n         *      The original event object.\n         * @param {Object} event.userData\n         *      Arbitrary user-defined object.\n         */\n        blurHandler: function () { }\n    };\n\n    // https://github.com/openseadragon/openseadragon/pull/790\n    /**\n     * True if inside an iframe, otherwise false.\n     * @member {Boolean} isInIframe\n     * @private\n     * @inner\n     */\n    var isInIframe = (function() {\n        try {\n            return window.self !== window.top;\n        } catch (e) {\n            return true;\n        }\n    })();\n\n    // https://github.com/openseadragon/openseadragon/pull/790\n    /**\n     * @function\n     * @private\n     * @inner\n     * @returns {Boolean} True if the target supports DOM Level 2 event subscription methods, otherwise false.\n     */\n    function canAccessEvents (target) {\n        try {\n            return target.addEventListener && target.removeEventListener;\n        } catch (e) {\n            return false;\n        }\n    }\n\n    /**\n     * Provides continuous computation of velocity (speed and direction) of active pointers.\n     * This is a singleton, used by all MouseTracker instances, as it is unlikely there will ever be more than\n     * two active gesture pointers at a time.\n     *\n     * @private\n     * @member gesturePointVelocityTracker\n     * @memberof OpenSeadragon.MouseTracker\n     */\n    $.MouseTracker.gesturePointVelocityTracker = (function () {\n        var trackerPoints = [],\n            intervalId = 0,\n            lastTime = 0;\n\n        // Generates a unique identifier for a tracked gesture point\n        var _generateGuid = function ( tracker, gPoint ) {\n            return tracker.hash.toString() + gPoint.type + gPoint.id.toString();\n        };\n\n        // Interval timer callback. Computes velocity for all tracked gesture points.\n        var _doTracking = function () {\n            var i,\n                len = trackerPoints.length,\n                trackPoint,\n                gPoint,\n                now = $.now(),\n                elapsedTime,\n                distance,\n                speed;\n\n            elapsedTime = now - lastTime;\n            lastTime = now;\n\n            for ( i = 0; i < len; i++ ) {\n                trackPoint = trackerPoints[ i ];\n                gPoint = trackPoint.gPoint;\n                // Math.atan2 gives us just what we need for a velocity vector, as we can simply\n                //   use cos()/sin() to extract the x/y velocity components.\n                gPoint.direction = Math.atan2( gPoint.currentPos.y - trackPoint.lastPos.y, gPoint.currentPos.x - trackPoint.lastPos.x );\n                // speed = distance / elapsed time\n                distance = trackPoint.lastPos.distanceTo( gPoint.currentPos );\n                trackPoint.lastPos = gPoint.currentPos;\n                speed = 1000 * distance / ( elapsedTime + 1 );\n                // Simple biased average, favors the most recent speed computation. Smooths out erratic gestures a bit.\n                gPoint.speed = 0.75 * speed + 0.25 * gPoint.speed;\n            }\n        };\n\n        // Public. Add a gesture point to be tracked\n        var addPoint = function ( tracker, gPoint ) {\n            var guid = _generateGuid( tracker, gPoint );\n\n            trackerPoints.push(\n                {\n                    guid: guid,\n                    gPoint: gPoint,\n                    lastPos: gPoint.currentPos\n                } );\n\n            // Only fire up the interval timer when there's gesture pointers to track\n            if ( trackerPoints.length === 1 ) {\n                lastTime = $.now();\n                intervalId = window.setInterval( _doTracking, 50 );\n            }\n        };\n\n        // Public. Stop tracking a gesture point\n        var removePoint = function ( tracker, gPoint ) {\n            var guid = _generateGuid( tracker, gPoint ),\n                i,\n                len = trackerPoints.length;\n            for ( i = 0; i < len; i++ ) {\n                if ( trackerPoints[ i ].guid === guid ) {\n                    trackerPoints.splice( i, 1 );\n                    // Only run the interval timer if theres gesture pointers to track\n                    len--;\n                    if ( len === 0 ) {\n                        window.clearInterval( intervalId );\n                    }\n                    break;\n                }\n            }\n        };\n\n        return {\n            addPoint:    addPoint,\n            removePoint: removePoint\n        };\n    } )();\n\n\n///////////////////////////////////////////////////////////////////////////////\n// Pointer event model and feature detection\n///////////////////////////////////////////////////////////////////////////////\n\n    $.MouseTracker.captureElement = document;\n\n    /**\n     * Detect available mouse wheel event name.\n     */\n    $.MouseTracker.wheelEventName = ( $.Browser.vendor === $.BROWSERS.IE && $.Browser.version > 8 ) ||\n                                                ( 'onwheel' in document.createElement( 'div' ) ) ? 'wheel' : // Modern browsers support 'wheel'\n                                    document.onmousewheel !== undefined ? 'mousewheel' :                     // Webkit and IE support at least 'mousewheel'\n                                    'DOMMouseScroll';                                                        // Assume old Firefox\n\n    /**\n     * Detect browser pointer device event model(s) and build appropriate list of events to subscribe to.\n     */\n    $.MouseTracker.subscribeEvents = [ \"click\", \"dblclick\", \"keydown\", \"keyup\", \"keypress\", \"focus\", \"blur\", \"contextmenu\", $.MouseTracker.wheelEventName ];\n\n    if( $.MouseTracker.wheelEventName === \"DOMMouseScroll\" ) {\n        // Older Firefox\n        $.MouseTracker.subscribeEvents.push( \"MozMousePixelScroll\" );\n    }\n\n    if ( window.PointerEvent ) {\n        // IE11 and other W3C Pointer Event implementations (see http://www.w3.org/TR/pointerevents)\n        $.MouseTracker.havePointerEvents = true;\n        $.MouseTracker.subscribeEvents.push( \"pointerenter\", \"pointerleave\", \"pointerover\", \"pointerout\", \"pointerdown\", \"pointerup\", \"pointermove\", \"pointercancel\" );\n        // Pointer events capture support\n        $.MouseTracker.havePointerCapture = (function () {\n            var divElement = document.createElement( 'div' );\n            return $.isFunction( divElement.setPointerCapture ) && $.isFunction( divElement.releasePointerCapture );\n        }());\n        if ( $.MouseTracker.havePointerCapture ) {\n            $.MouseTracker.subscribeEvents.push( \"gotpointercapture\", \"lostpointercapture\" );\n        }\n    } else {\n        // Legacy W3C mouse events\n        $.MouseTracker.havePointerEvents = false;\n        $.MouseTracker.subscribeEvents.push( \"mouseenter\", \"mouseleave\", \"mouseover\", \"mouseout\", \"mousedown\", \"mouseup\", \"mousemove\" );\n        $.MouseTracker.mousePointerId = \"legacy-mouse\";\n        // Legacy mouse events capture support (IE/Firefox only?)\n        $.MouseTracker.havePointerCapture = (function () {\n            var divElement = document.createElement( 'div' );\n            return $.isFunction( divElement.setCapture ) && $.isFunction( divElement.releaseCapture );\n        }());\n        if ( $.MouseTracker.havePointerCapture ) {\n            $.MouseTracker.subscribeEvents.push( \"losecapture\" );\n        }\n        // Legacy touch events\n        if ( 'ontouchstart' in window ) {\n            // iOS, Android, and other W3c Touch Event implementations\n            //    (see http://www.w3.org/TR/touch-events/)\n            //    (see https://developer.apple.com/library/ios/documentation/AppleApplications/Reference/SafariWebContent/HandlingEvents/HandlingEvents.html)\n            //    (see https://developer.apple.com/library/safari/documentation/AppleApplications/Reference/SafariWebContent/HandlingEvents/HandlingEvents.html)\n            $.MouseTracker.subscribeEvents.push( \"touchstart\", \"touchend\", \"touchmove\", \"touchcancel\" );\n        }\n        if ( 'ongesturestart' in window ) {\n            // iOS (see https://developer.apple.com/library/ios/documentation/AppleApplications/Reference/SafariWebContent/HandlingEvents/HandlingEvents.html)\n            //   Subscribe to these to prevent default gesture handling\n            $.MouseTracker.subscribeEvents.push( \"gesturestart\", \"gesturechange\" );\n        }\n    }\n\n\n///////////////////////////////////////////////////////////////////////////////\n// Classes and typedefs\n///////////////////////////////////////////////////////////////////////////////\n\n    /**\n     * Used for the processing/disposition of DOM events (propagation, default handling, capture, etc.)\n     *\n     * @typedef {Object} EventProcessInfo\n     * @memberof OpenSeadragon.MouseTracker\n     * @since v2.5.0\n     *\n     * @property {OpenSeadragon.MouseTracker} eventSource\n     *      A reference to the tracker instance.\n     * @property {Object} originalEvent\n     *      The original DOM event object.\n     * @property {Number} eventPhase\n     *      0 == NONE, 1 == CAPTURING_PHASE, 2 == AT_TARGET, 3 == BUBBLING_PHASE.\n     * @property {String} eventType\n     *     \"keydown\", \"keyup\", \"keypress\", \"focus\", \"blur\", \"contextmenu\", \"gotpointercapture\", \"lostpointercapture\", \"pointerenter\", \"pointerleave\", \"pointerover\", \"pointerout\", \"pointerdown\", \"pointerup\", \"pointermove\", \"pointercancel\", \"wheel\", \"click\", \"dblclick\".\n     * @property {String} pointerType\n     *     \"mouse\", \"touch\", \"pen\", etc.\n     * @property {Boolean} isEmulated\n     *      True if this is an emulated event. If true, originalEvent is either the event that caused\n     *      the emulated event, a synthetic event object created with values from the actual DOM event,\n     *      or null if no DOM event applies. Emulated events can occur on eventType \"wheel\" on legacy mouse-scroll\n     *      event emitting user agents.\n     * @property {Boolean} isStoppable\n     *      True if propagation of the event (e.g. bubbling) can be stopped with stopPropagation/stopImmediatePropagation.\n     * @property {Boolean} isCancelable\n     *      True if the event's default handling by the browser can be prevented with preventDefault.\n     * @property {Boolean} defaultPrevented\n     *      True if the event's default handling has already been prevented by a descendent element.\n     * @property {Boolean} preventDefault\n     *      Set to true to prevent the event's default handling by the browser.\n     * @property {Boolean} preventGesture\n     *      Set to true to prevent this MouseTracker from generating a gesture from the event.\n     *      Valid on eventType \"pointerdown\".\n     * @property {Boolean} stopPropagation\n     *      Set to true prevent the event from propagating to ancestor/descendent elements on capture/bubble phase.\n     * @property {Boolean} shouldCapture\n     *      (Internal Use) Set to true if the pointer should be captured (events (re)targeted to tracker element).\n     * @property {Boolean} shouldReleaseCapture\n     *      (Internal Use) Set to true if the captured pointer should be released.\n     * @property {Object} userData\n     *      Arbitrary user-defined object.\n     */\n\n\n    /**\n     * Represents a point of contact on the screen made by a mouse cursor, pen, touch, or other pointer device.\n     *\n     * @typedef {Object} GesturePoint\n     * @memberof OpenSeadragon.MouseTracker\n     *\n     * @property {Number} id\n     *     Identifier unique from all other active GesturePoints for a given pointer device.\n     * @property {String} type\n     *     The pointer device type: \"mouse\", \"touch\", \"pen\", etc.\n     * @property {Boolean} captured\n     *     True if events for the gesture point are captured to the tracked element.\n     * @property {Boolean} isPrimary\n     *     True if the gesture point is a master pointer amongst the set of active pointers for each pointer type. True for mouse and primary (first) touch/pen pointers.\n     * @property {Boolean} insideElementPressed\n     *     True if button pressed or contact point initiated inside the screen area of the tracked element.\n     * @property {Boolean} insideElement\n     *     True if pointer or contact point is currently inside the bounds of the tracked element.\n     * @property {Number} speed\n     *     Current computed speed, in pixels per second.\n     * @property {Number} direction\n     *     Current computed direction, expressed as an angle counterclockwise relative to the positive X axis (-pi to pi, in radians). Only valid if speed > 0.\n     * @property {OpenSeadragon.Point} contactPos\n     *     The initial pointer contact position, relative to the page including any scrolling. Only valid if the pointer has contact (pressed, touch contact, pen contact).\n     * @property {Number} contactTime\n     *     The initial pointer contact time, in milliseconds. Only valid if the pointer has contact (pressed, touch contact, pen contact).\n     * @property {OpenSeadragon.Point} lastPos\n     *     The last pointer position, relative to the page including any scrolling.\n     * @property {Number} lastTime\n     *     The last pointer contact time, in milliseconds.\n     * @property {OpenSeadragon.Point} currentPos\n     *     The current pointer position, relative to the page including any scrolling.\n     * @property {Number} currentTime\n     *     The current pointer contact time, in milliseconds.\n     */\n\n\n    /**\n     * @class GesturePointList\n     * @classdesc Provides an abstraction for a set of active {@link OpenSeadragon.MouseTracker.GesturePoint|GesturePoint} objects for a given pointer device type.\n     *            Active pointers are any pointer being tracked for this element which are in the hit-test area\n     *            of the element (for hover-capable devices) and/or have contact or a button press initiated in the element.\n     * @memberof OpenSeadragon.MouseTracker\n     * @param {String} type - The pointer device type: \"mouse\", \"touch\", \"pen\", etc.\n     */\n    $.MouseTracker.GesturePointList = function ( type ) {\n        this._gPoints = [];\n        /**\n         * The pointer device type: \"mouse\", \"touch\", \"pen\", etc.\n         * @member {String} type\n         * @memberof OpenSeadragon.MouseTracker.GesturePointList#\n         */\n        this.type = type;\n        /**\n         * Current buttons pressed for the device.\n         * Combination of bit flags 0: none, 1: primary (or touch contact), 2: secondary, 4: aux (often middle), 8: X1 (often back), 16: X2 (often forward), 32: pen eraser.\n         * @member {Number} buttons\n         * @memberof OpenSeadragon.MouseTracker.GesturePointList#\n         */\n        this.buttons = 0;\n        /**\n         * Current number of contact points (touch points, mouse down, etc.) for the device.\n         * @member {Number} contacts\n         * @memberof OpenSeadragon.MouseTracker.GesturePointList#\n         */\n        this.contacts = 0;\n        /**\n         * Current number of clicks for the device. Used for multiple click gesture tracking.\n         * @member {Number} clicks\n         * @memberof OpenSeadragon.MouseTracker.GesturePointList#\n         */\n        this.clicks = 0;\n        /**\n         * Current number of captured pointers for the device.\n         * @member {Number} captureCount\n         * @memberof OpenSeadragon.MouseTracker.GesturePointList#\n         */\n        this.captureCount = 0;\n    };\n\n    /** @lends OpenSeadragon.MouseTracker.GesturePointList.prototype */\n    $.MouseTracker.GesturePointList.prototype = {\n        /**\n         * @function\n         * @returns {Number} Number of gesture points in the list.\n         */\n        getLength: function () {\n            return this._gPoints.length;\n        },\n        /**\n         * @function\n         * @returns {Array.<OpenSeadragon.MouseTracker.GesturePoint>} The list of gesture points in the list as an array (read-only).\n         */\n        asArray: function () {\n            return this._gPoints;\n        },\n        /**\n         * @function\n         * @param {OpenSeadragon.MouseTracker.GesturePoint} gesturePoint - A gesture point to add to the list.\n         * @returns {Number} Number of gesture points in the list.\n         */\n        add: function ( gp ) {\n            return this._gPoints.push( gp );\n        },\n        /**\n         * @function\n         * @param {Number} id - The id of the gesture point to remove from the list.\n         * @returns {Number} Number of gesture points in the list.\n         */\n        removeById: function ( id ) {\n            var i,\n                len = this._gPoints.length;\n            for ( i = 0; i < len; i++ ) {\n                if ( this._gPoints[ i ].id === id ) {\n                    this._gPoints.splice( i, 1 );\n                    break;\n                }\n            }\n            return this._gPoints.length;\n        },\n        /**\n         * @function\n         * @param {Number} index - The index of the gesture point to retrieve from the list.\n         * @returns {OpenSeadragon.MouseTracker.GesturePoint|null} The gesture point at the given index, or null if not found.\n         */\n        getByIndex: function ( index ) {\n            if ( index < this._gPoints.length) {\n                return this._gPoints[ index ];\n            }\n\n            return null;\n        },\n        /**\n         * @function\n         * @param {Number} id - The id of the gesture point to retrieve from the list.\n         * @returns {OpenSeadragon.MouseTracker.GesturePoint|null} The gesture point with the given id, or null if not found.\n         */\n        getById: function ( id ) {\n            var i,\n                len = this._gPoints.length;\n            for ( i = 0; i < len; i++ ) {\n                if ( this._gPoints[ i ].id === id ) {\n                    return this._gPoints[ i ];\n                }\n            }\n            return null;\n        },\n        /**\n         * @function\n         * @returns {OpenSeadragon.MouseTracker.GesturePoint|null} The primary gesture point in the list, or null if not found.\n         */\n        getPrimary: function ( id ) {\n            var i,\n                len = this._gPoints.length;\n            for ( i = 0; i < len; i++ ) {\n                if ( this._gPoints[ i ].isPrimary ) {\n                    return this._gPoints[ i ];\n                }\n            }\n            return null;\n        },\n\n        /**\n         * Increment this pointer list's contact count.\n         * It will evaluate whether this pointer type is allowed to have multiple contacts.\n         * @function\n         */\n        addContact: function() {\n            ++this.contacts;\n\n            if (this.contacts > 1 && (this.type === \"mouse\" || this.type === \"pen\")) {\n                $.console.warn('GesturePointList.addContact() Implausible contacts value');\n                this.contacts = 1;\n            }\n        },\n\n        /**\n         * Decrement this pointer list's contact count.\n         * It will make sure the count does not go below 0.\n         * @function\n         */\n        removeContact: function() {\n            --this.contacts;\n\n            if (this.contacts < 0) {\n                this.contacts = 0;\n            }\n        }\n    };\n\n\n///////////////////////////////////////////////////////////////////////////////\n// Utility functions\n///////////////////////////////////////////////////////////////////////////////\n\n    /**\n     * Removes all tracked pointers.\n     * @private\n     * @inner\n     */\n    function clearTrackedPointers( tracker ) {\n        var delegate = THIS[ tracker.hash ],\n            i, j,\n            pointsList,\n            gPoints,\n            gPointsToRemove,\n            pointerListCount = delegate.activePointersLists.length;\n\n        for ( i = 0; i < pointerListCount; i++ ) {\n            pointsList = delegate.activePointersLists[ i ];\n\n            if ( pointsList.getLength() > 0 ) {\n                // Make an array containing references to the gPoints in the pointer list\n                //   (because calls to stopTrackingPointer() are going to modify the pointer list)\n                gPointsToRemove = [];\n                gPoints = pointsList.asArray();\n                for ( j = 0; j < gPoints.length; j++ ) {\n                    gPointsToRemove.push( gPoints[ j ] );\n                }\n\n                // Release and remove all gPoints from the pointer list\n                for ( j = 0; j < gPointsToRemove.length; j++ ) {\n                    stopTrackingPointer( tracker, pointsList, gPointsToRemove[ j ] );\n                }\n            }\n        }\n\n        for ( i = 0; i < pointerListCount; i++ ) {\n            delegate.activePointersLists.pop();\n        }\n\n        delegate.sentDragEvent = false;\n    }\n\n    /**\n     * Starts tracking pointer events on the tracked element.\n     * @private\n     * @inner\n     */\n    function startTracking( tracker ) {\n        var delegate = THIS[ tracker.hash ],\n            event,\n            i;\n\n        if ( !delegate.tracking ) {\n            for ( i = 0; i < $.MouseTracker.subscribeEvents.length; i++ ) {\n                event = $.MouseTracker.subscribeEvents[ i ];\n                $.addEvent(\n                    tracker.element,\n                    event,\n                    delegate[ event ],\n                    event === $.MouseTracker.wheelEventName ? { passive: false, capture: false } : false\n                );\n            }\n\n            clearTrackedPointers( tracker );\n\n            delegate.tracking = true;\n        }\n    }\n\n    /**\n     * Stops tracking pointer events on the tracked element.\n     * @private\n     * @inner\n     */\n    function stopTracking( tracker ) {\n        var delegate = THIS[ tracker.hash ],\n            event,\n            i;\n\n        if ( delegate.tracking ) {\n            for ( i = 0; i < $.MouseTracker.subscribeEvents.length; i++ ) {\n                event = $.MouseTracker.subscribeEvents[ i ];\n                $.removeEvent(\n                    tracker.element,\n                    event,\n                    delegate[ event ],\n                    false\n                );\n            }\n\n            clearTrackedPointers( tracker );\n\n            delegate.tracking = false;\n        }\n    }\n\n    /**\n     * @private\n     * @inner\n     */\n    function getCaptureEventParams( tracker, pointerType ) {\n        var delegate = THIS[ tracker.hash ];\n\n        if ( pointerType === 'pointerevent' ) {\n            return {\n                upName: 'pointerup',\n                upHandler: delegate.pointerupcaptured,\n                moveName: 'pointermove',\n                moveHandler: delegate.pointermovecaptured\n            };\n        } else if ( pointerType === 'mouse' ) {\n            return {\n                upName: 'pointerup',\n                upHandler: delegate.pointerupcaptured,\n                moveName: 'pointermove',\n                moveHandler: delegate.pointermovecaptured\n            };\n        } else if ( pointerType === 'touch' ) {\n            return {\n                upName: 'touchend',\n                upHandler: delegate.touchendcaptured,\n                moveName: 'touchmove',\n                moveHandler: delegate.touchmovecaptured\n            };\n        } else {\n            throw new Error( \"MouseTracker.getCaptureEventParams: Unknown pointer type.\" );\n        }\n    }\n\n    /**\n     * Begin capturing pointer events to the tracked element.\n     * @private\n     * @inner\n     */\n    function capturePointer( tracker, gPoint ) {\n        var eventParams;\n\n        if ( $.MouseTracker.havePointerCapture ) {\n            if ( $.MouseTracker.havePointerEvents ) {\n                // Can throw NotFoundError (InvalidPointerId Firefox < 82)\n                //   (should never happen so we'll log a warning)\n                try {\n                    tracker.element.setPointerCapture( gPoint.id );\n                    //$.console.log('element.setPointerCapture() called');\n                } catch ( e ) {\n                    $.console.warn('setPointerCapture() called on invalid pointer ID');\n                    return;\n                }\n            } else {\n                tracker.element.setCapture( true );\n                //$.console.log('element.setCapture() called');\n            }\n        } else {\n            // Emulate mouse capture by hanging listeners on the document object.\n            //    (Note we listen on the capture phase so the captured handlers will get called first)\n            // eslint-disable-next-line no-use-before-define\n            //$.console.log('Emulated mouse capture set');\n            eventParams = getCaptureEventParams( tracker, $.MouseTracker.havePointerEvents ? 'pointerevent' : gPoint.type );\n            // https://github.com/openseadragon/openseadragon/pull/790\n            if (isInIframe && canAccessEvents(window.top)) {\n                $.addEvent(\n                    window.top,\n                    eventParams.upName,\n                    eventParams.upHandler,\n                    true\n                );\n            }\n            $.addEvent(\n                $.MouseTracker.captureElement,\n                eventParams.upName,\n                eventParams.upHandler,\n                true\n            );\n            $.addEvent(\n                $.MouseTracker.captureElement,\n                eventParams.moveName,\n                eventParams.moveHandler,\n                true\n            );\n        }\n\n        updatePointerCaptured( tracker, gPoint, true );\n    }\n\n\n    /**\n     * Stop capturing pointer events to the tracked element.\n     * @private\n     * @inner\n     */\n    function releasePointer( tracker, gPoint ) {\n        var eventParams;\n        var pointsList;\n        var cachedGPoint;\n\n        if ( $.MouseTracker.havePointerCapture ) {\n            if ( $.MouseTracker.havePointerEvents ) {\n                pointsList = tracker.getActivePointersListByType( gPoint.type );\n                cachedGPoint = pointsList.getById( gPoint.id );\n                if ( !cachedGPoint || !cachedGPoint.captured ) {\n                    return;\n                }\n                // Can throw NotFoundError (InvalidPointerId Firefox < 82)\n                //   (should never happen, but it does on Firefox 79 touch so we won't log a warning)\n                try {\n                    tracker.element.releasePointerCapture( gPoint.id );\n                    //$.console.log('element.releasePointerCapture() called');\n                } catch ( e ) {\n                    //$.console.warn('releasePointerCapture() called on invalid pointer ID');\n                }\n            } else {\n                tracker.element.releaseCapture();\n                //$.console.log('element.releaseCapture() called');\n            }\n        } else {\n            // Emulate mouse capture by hanging listeners on the document object.\n            //    (Note we listen on the capture phase so the captured handlers will get called first)\n            //$.console.log('Emulated mouse capture release');\n            eventParams = getCaptureEventParams( tracker, $.MouseTracker.havePointerEvents ? 'pointerevent' : gPoint.type );\n            // https://github.com/openseadragon/openseadragon/pull/790\n            if (isInIframe && canAccessEvents(window.top)) {\n                $.removeEvent(\n                    window.top,\n                    eventParams.upName,\n                    eventParams.upHandler,\n                    true\n                );\n            }\n            $.removeEvent(\n                $.MouseTracker.captureElement,\n                eventParams.moveName,\n                eventParams.moveHandler,\n                true\n            );\n            $.removeEvent(\n                $.MouseTracker.captureElement,\n                eventParams.upName,\n                eventParams.upHandler,\n                true\n            );\n        }\n\n        updatePointerCaptured( tracker, gPoint, false );\n    }\n\n\n    /**\n     * Note: Called for both pointer events and legacy mouse events\n     *         ($.MouseTracker.havePointerEvents determines which)\n     * @private\n     * @inner\n     */\n    function getPointerId( event ) {\n        return ( $.MouseTracker.havePointerEvents ) ? event.pointerId : $.MouseTracker.mousePointerId;\n    }\n\n\n    /**\n     * Gets a W3C Pointer Events model compatible pointer type string from a DOM pointer event.\n     * IE10 used a long integer value, but the W3C specification (and IE11+) use a string \"mouse\", \"touch\", \"pen\", etc.\n     *\n     * Note: Called for both pointer events and legacy mouse events\n     *         ($.MouseTracker.havePointerEvents determines which)\n     * @private\n     * @inner\n     */\n    function getPointerType( event ) {\n        if ( $.MouseTracker.havePointerEvents ) {\n            // Note: IE pointer events bug - sends invalid pointerType on lostpointercapture events\n            //    and possibly other events. We rely on sane, valid property values in DOM events, so for\n            //    IE, when the pointerType is missing, we'll default to 'mouse'...should be right most of the time\n            return event.pointerType || (( $.Browser.vendor === $.BROWSERS.IE ) ? 'mouse' : '');\n        } else {\n            return 'mouse';\n        }\n    }\n\n\n    /**\n     * Note: Called for both pointer events and legacy mouse events\n     *         ($.MouseTracker.havePointerEvents determines which)\n     * @private\n     * @inner\n     */\n    function getIsPrimary( event ) {\n        return ( $.MouseTracker.havePointerEvents ) ? event.isPrimary : true;\n    }\n\n\n    /**\n     * @private\n     * @inner\n     */\n    function getMouseAbsolute( event ) {\n        return $.getMousePosition( event );\n    }\n\n    /**\n     * @private\n     * @inner\n     */\n    function getMouseRelative( event, element ) {\n        return getPointRelativeToAbsolute( getMouseAbsolute( event ), element );\n    }\n\n    /**\n     * @private\n     * @inner\n     */\n    function getPointRelativeToAbsolute( point, element ) {\n        var offset = $.getElementOffset( element );\n        return point.minus( offset );\n    }\n\n    /**\n     * @private\n     * @inner\n     */\n    function getCenterPoint( point1, point2 ) {\n        return new $.Point( ( point1.x + point2.x ) / 2, ( point1.y + point2.y ) / 2 );\n    }\n\n\n///////////////////////////////////////////////////////////////////////////////\n// Device-specific DOM event handlers\n///////////////////////////////////////////////////////////////////////////////\n\n    /**\n     * @private\n     * @inner\n     */\n    function onClick( tracker, event ) {\n        //$.console.log('click ' + (tracker.userData ? tracker.userData.toString() : ''));\n\n        var eventInfo = {\n            originalEvent: event,\n            eventType: 'click',\n            pointerType: 'mouse',\n            isEmulated: false\n        };\n        preProcessEvent( tracker, eventInfo );\n\n        if ( eventInfo.preventDefault && !eventInfo.defaultPrevented ) {\n            $.cancelEvent( event );\n        }\n        if ( eventInfo.stopPropagation ) {\n            $.stopEvent( event );\n        }\n    }\n\n\n    /**\n     * @private\n     * @inner\n     */\n    function onDblClick( tracker, event ) {\n        //$.console.log('dblclick ' + (tracker.userData ? tracker.userData.toString() : ''));\n\n        var eventInfo = {\n            originalEvent: event,\n            eventType: 'dblclick',\n            pointerType: 'mouse',\n            isEmulated: false\n        };\n        preProcessEvent( tracker, eventInfo );\n\n        if ( eventInfo.preventDefault && !eventInfo.defaultPrevented ) {\n            $.cancelEvent( event );\n        }\n        if ( eventInfo.stopPropagation ) {\n            $.stopEvent( event );\n        }\n    }\n\n\n    /**\n     * @private\n     * @inner\n     */\n    function onKeyDown( tracker, event ) {\n        //$.console.log( \"keydown %s %s %s %s %s\", event.keyCode, event.charCode, event.ctrlKey, event.shiftKey, event.altKey );\n        var eventArgs = null;\n\n        var eventInfo = {\n            originalEvent: event,\n            eventType: 'keydown',\n            pointerType: '',\n            isEmulated: false\n        };\n        preProcessEvent( tracker, eventInfo );\n\n        if ( tracker.keyDownHandler && !eventInfo.preventGesture && !eventInfo.defaultPrevented ) {\n            eventArgs = {\n                eventSource:          tracker,\n                keyCode:              event.keyCode ? event.keyCode : event.charCode,\n                ctrl:                 event.ctrlKey,\n                shift:                event.shiftKey,\n                alt:                  event.altKey,\n                meta:                 event.metaKey,\n                originalEvent:        event,\n                preventDefault:       eventInfo.preventDefault || eventInfo.defaultPrevented,\n                userData:             tracker.userData\n            };\n\n            tracker.keyDownHandler( eventArgs );\n        }\n\n        if ( ( eventArgs && eventArgs.preventDefault ) || ( eventInfo.preventDefault && !eventInfo.defaultPrevented ) ) {\n                $.cancelEvent( event );\n        }\n        if ( eventInfo.stopPropagation ) {\n            $.stopEvent( event );\n        }\n    }\n\n\n    /**\n     * @private\n     * @inner\n     */\n    function onKeyUp( tracker, event ) {\n        //$.console.log( \"keyup %s %s %s %s %s\", event.keyCode, event.charCode, event.ctrlKey, event.shiftKey, event.altKey );\n\n        var eventArgs = null;\n\n        var eventInfo = {\n            originalEvent: event,\n            eventType: 'keyup',\n            pointerType: '',\n            isEmulated: false\n        };\n        preProcessEvent( tracker, eventInfo );\n\n        if ( tracker.keyUpHandler && !eventInfo.preventGesture && !eventInfo.defaultPrevented ) {\n            eventArgs = {\n                eventSource:          tracker,\n                keyCode:              event.keyCode ? event.keyCode : event.charCode,\n                ctrl:                 event.ctrlKey,\n                shift:                event.shiftKey,\n                alt:                  event.altKey,\n                meta:                 event.metaKey,\n                originalEvent:        event,\n                preventDefault:       eventInfo.preventDefault || eventInfo.defaultPrevented,\n                userData:             tracker.userData\n            };\n\n            tracker.keyUpHandler( eventArgs );\n        }\n\n        if ( ( eventArgs && eventArgs.preventDefault ) || ( eventInfo.preventDefault && !eventInfo.defaultPrevented ) ) {\n            $.cancelEvent( event );\n        }\n        if ( eventInfo.stopPropagation ) {\n            $.stopEvent( event );\n        }\n    }\n\n\n    /**\n     * @private\n     * @inner\n     */\n    function onKeyPress( tracker, event ) {\n        //$.console.log( \"keypress %s %s %s %s %s\", event.keyCode, event.charCode, event.ctrlKey, event.shiftKey, event.altKey );\n\n        var eventArgs = null;\n\n        var eventInfo = {\n            originalEvent: event,\n            eventType: 'keypress',\n            pointerType: '',\n            isEmulated: false\n        };\n        preProcessEvent( tracker, eventInfo );\n\n        if ( tracker.keyHandler && !eventInfo.preventGesture && !eventInfo.defaultPrevented ) {\n            eventArgs = {\n                eventSource:          tracker,\n                keyCode:              event.keyCode ? event.keyCode : event.charCode,\n                ctrl:                 event.ctrlKey,\n                shift:                event.shiftKey,\n                alt:                  event.altKey,\n                meta:                 event.metaKey,\n                originalEvent:        event,\n                preventDefault:       eventInfo.preventDefault || eventInfo.defaultPrevented,\n                userData:             tracker.userData\n            };\n\n            tracker.keyHandler( eventArgs );\n        }\n\n        if ( ( eventArgs && eventArgs.preventDefault ) || ( eventInfo.preventDefault && !eventInfo.defaultPrevented ) ) {\n            $.cancelEvent( event );\n        }\n        if ( eventInfo.stopPropagation ) {\n            $.stopEvent( event );\n        }\n    }\n\n\n    /**\n     * @private\n     * @inner\n     */\n    function onFocus( tracker, event ) {\n        //$.console.log('focus  ' + (tracker.userData ? tracker.userData.toString() : ''));\n\n        // focus doesn't bubble and is not cancelable, but we call\n        //   preProcessEvent() so it's dispatched to preProcessEventHandler\n        //   if necessary\n        var eventInfo = {\n            originalEvent: event,\n            eventType: 'focus',\n            pointerType: '',\n            isEmulated: false\n        };\n        preProcessEvent( tracker, eventInfo );\n\n        if ( tracker.focusHandler && !eventInfo.preventGesture ) {\n            tracker.focusHandler(\n                {\n                    eventSource:          tracker,\n                    originalEvent:        event,\n                    userData:             tracker.userData\n                }\n            );\n        }\n    }\n\n\n    /**\n     * @private\n     * @inner\n     */\n    function onBlur( tracker, event ) {\n        //$.console.log('blur  ' + (tracker.userData ? tracker.userData.toString() : ''));\n\n        // blur doesn't bubble and is not cancelable, but we call\n        //   preProcessEvent() so it's dispatched to preProcessEventHandler\n        //   if necessary\n        var eventInfo = {\n            originalEvent: event,\n            eventType: 'blur',\n            pointerType: '',\n            isEmulated: false\n        };\n        preProcessEvent( tracker, eventInfo );\n\n        if ( tracker.blurHandler && !eventInfo.preventGesture ) {\n            tracker.blurHandler(\n                {\n                    eventSource:          tracker,\n                    originalEvent:        event,\n                    userData:             tracker.userData\n                }\n            );\n        }\n    }\n\n\n    /**\n     * @private\n     * @inner\n     */\n    function onContextMenu( tracker, event ) {\n        //$.console.log('contextmenu ' + (tracker.userData ? tracker.userData.toString() : '') + ' ' + (event.target === tracker.element ? 'tracker.element' : ''));\n\n        var eventArgs = null;\n\n        var eventInfo = {\n            originalEvent: event,\n            eventType: 'contextmenu',\n            pointerType: 'mouse',\n            isEmulated: false\n        };\n        preProcessEvent( tracker, eventInfo );\n\n        // ContextMenu\n        if ( tracker.contextMenuHandler && !eventInfo.preventGesture && !eventInfo.defaultPrevented ) {\n            eventArgs = {\n                eventSource:          tracker,\n                position:             getPointRelativeToAbsolute( getMouseAbsolute( event ), tracker.element ),\n                originalEvent:        eventInfo.originalEvent,\n                preventDefault:       eventInfo.preventDefault || eventInfo.defaultPrevented,\n                userData:             tracker.userData\n            };\n\n            tracker.contextMenuHandler( eventArgs );\n        }\n\n        if ( ( eventArgs && eventArgs.preventDefault ) || ( eventInfo.preventDefault && !eventInfo.defaultPrevented ) ) {\n            $.cancelEvent( event );\n        }\n        if ( eventInfo.stopPropagation ) {\n            $.stopEvent( event );\n        }\n    }\n\n\n    /**\n     * Handler for 'wheel' events\n     *\n     * @private\n     * @inner\n     */\n    function onWheel( tracker, event ) {\n        handleWheelEvent( tracker, event, event );\n    }\n\n\n    /**\n     * Handler for 'mousewheel', 'DOMMouseScroll', and 'MozMousePixelScroll' events\n     *\n     * @private\n     * @inner\n     */\n    function onMouseWheel( tracker, event ) {\n        // Simulate a 'wheel' event\n        var simulatedEvent = {\n            target:     event.target || event.srcElement,\n            type:       \"wheel\",\n            shiftKey:   event.shiftKey || false,\n            clientX:    event.clientX,\n            clientY:    event.clientY,\n            pageX:      event.pageX ? event.pageX : event.clientX,\n            pageY:      event.pageY ? event.pageY : event.clientY,\n            deltaMode:  event.type === \"MozMousePixelScroll\" ? 0 : 1, // 0=pixel, 1=line, 2=page\n            deltaX:     0,\n            deltaZ:     0\n        };\n\n        // Calculate deltaY\n        if ( $.MouseTracker.wheelEventName === \"mousewheel\" ) {\n            simulatedEvent.deltaY = -event.wheelDelta / $.DEFAULT_SETTINGS.pixelsPerWheelLine;\n        } else {\n            simulatedEvent.deltaY = event.detail;\n        }\n\n        handleWheelEvent( tracker, simulatedEvent, event );\n    }\n\n\n    /**\n     * Handles 'wheel' events.\n     * The event may be simulated by the legacy mouse wheel event handler (onMouseWheel()).\n     *\n     * @private\n     * @inner\n     */\n    function handleWheelEvent( tracker, event, originalEvent ) {\n        var nDelta = 0,\n            eventInfo;\n\n        var eventArgs = null;\n\n        // The nDelta variable is gated to provide smooth z-index scrolling\n        //   since the mouse wheel allows for substantial deltas meant for rapid\n        //   y-index scrolling.\n        // event.deltaMode: 0=pixel, 1=line, 2=page\n        // TODO: Deltas in pixel mode should be accumulated then a scroll value computed after $.DEFAULT_SETTINGS.pixelsPerWheelLine threshold reached\n        nDelta = event.deltaY < 0 ? 1 : -1;\n\n        eventInfo = {\n            originalEvent: event,\n            eventType: 'wheel',\n            pointerType: 'mouse',\n            isEmulated: event !== originalEvent\n        };\n        preProcessEvent( tracker, eventInfo );\n\n        if ( tracker.scrollHandler && !eventInfo.preventGesture && !eventInfo.defaultPrevented ) {\n            eventArgs = {\n                eventSource:          tracker,\n                pointerType:          'mouse',\n                position:             getMouseRelative( event, tracker.element ),\n                scroll:               nDelta,\n                shift:                event.shiftKey,\n                isTouchEvent:         false,\n                originalEvent:        originalEvent,\n                preventDefault:       eventInfo.preventDefault || eventInfo.defaultPrevented,\n                userData:             tracker.userData\n            };\n\n\n            tracker.scrollHandler( eventArgs );\n        }\n\n        if ( eventInfo.stopPropagation ) {\n            $.stopEvent( originalEvent );\n        }\n        if ( ( eventArgs && eventArgs.preventDefault ) || ( eventInfo.preventDefault && !eventInfo.defaultPrevented ) ) {\n                $.cancelEvent( originalEvent );\n        }\n}\n\n\n    /**\n     * TODO Never actually seen this event fired, and documentation is tough to find\n     * @private\n     * @inner\n     */\n    function onLoseCapture( tracker, event ) {\n        //$.console.log('losecapture ' + (tracker.userData ? tracker.userData.toString() : '') + ' ' + (event.target === tracker.element ? 'tracker.element' : ''));\n\n        var gPoint = {\n            id: $.MouseTracker.mousePointerId,\n            type: 'mouse'\n        };\n\n        var eventInfo = {\n            originalEvent: event,\n            eventType: 'lostpointercapture',\n            pointerType: 'mouse',\n            isEmulated: false\n        };\n        preProcessEvent( tracker, eventInfo );\n\n        if ( event.target === tracker.element ) {\n            updatePointerCaptured( tracker, gPoint, false );\n        }\n\n        if ( eventInfo.stopPropagation ) {\n            $.stopEvent( event );\n        }\n    }\n\n\n    /**\n     * @private\n     * @inner\n     */\n    function onTouchStart( tracker, event ) {\n        var time,\n            i,\n            touchCount = event.changedTouches.length,\n            gPoint,\n            pointsList = tracker.getActivePointersListByType( 'touch' );\n\n        time = $.now();\n\n        //$.console.log('touchstart ' + (tracker.userData ? tracker.userData.toString() : '') + ' ' + (event.target === tracker.element ? 'tracker.element' : ''));\n\n        if ( pointsList.getLength() > event.touches.length - touchCount ) {\n            $.console.warn('Tracked touch contact count doesn\\'t match event.touches.length');\n        }\n\n        var eventInfo = {\n            originalEvent: event,\n            eventType: 'pointerdown',\n            pointerType: 'touch',\n            isEmulated: false\n        };\n        preProcessEvent( tracker, eventInfo );\n\n        for ( i = 0; i < touchCount; i++ ) {\n            gPoint = {\n                id: event.changedTouches[ i ].identifier,\n                type: 'touch',\n                // Simulate isPrimary\n                isPrimary: pointsList.getLength() === 0,\n                currentPos: getMouseAbsolute( event.changedTouches[ i ] ),\n                currentTime: time\n            };\n\n            // simulate touchenter on our tracked element\n            updatePointerEnter( tracker, eventInfo, gPoint );\n\n            updatePointerDown( tracker, eventInfo, gPoint, 0 );\n\n            updatePointerCaptured( tracker, gPoint, true );\n        }\n\n        if ( eventInfo.preventDefault && !eventInfo.defaultPrevented ) {\n            $.cancelEvent( event );\n        }\n        if ( eventInfo.stopPropagation ) {\n            $.stopEvent( event );\n        }\n    }\n\n\n    /**\n     * @private\n     * @inner\n     */\n    function onTouchEnd( tracker, event ) {\n        var time,\n            i,\n            touchCount = event.changedTouches.length,\n            gPoint;\n\n        time = $.now();\n\n        //$.console.log('touchend ' + (tracker.userData ? tracker.userData.toString() : '') + ' ' + (event.target === tracker.element ? 'tracker.element' : ''));\n\n        var eventInfo = {\n            originalEvent: event,\n            eventType: 'pointerup',\n            pointerType: 'touch',\n            isEmulated: false\n        };\n        preProcessEvent( tracker, eventInfo );\n\n        for ( i = 0; i < touchCount; i++ ) {\n            gPoint = {\n                id: event.changedTouches[ i ].identifier,\n                type: 'touch',\n                currentPos: getMouseAbsolute( event.changedTouches[ i ] ),\n                currentTime: time\n            };\n\n            updatePointerUp( tracker, eventInfo, gPoint, 0 );\n\n            updatePointerCaptured( tracker, gPoint, false );\n\n            // simulate touchleave on our tracked element\n            updatePointerLeave( tracker, eventInfo, gPoint );\n        }\n\n        if ( eventInfo.preventDefault && !eventInfo.defaultPrevented ) {\n            $.cancelEvent( event );\n        }\n        if ( eventInfo.stopPropagation ) {\n            $.stopEvent( event );\n        }\n    }\n\n\n    /**\n     * @private\n     * @inner\n     */\n    function onTouchMove( tracker, event ) {\n        var time,\n            i,\n            touchCount = event.changedTouches.length,\n            gPoint;\n\n        time = $.now();\n\n        var eventInfo = {\n            originalEvent: event,\n            eventType: 'pointermove',\n            pointerType: 'touch',\n            isEmulated: false\n        };\n        preProcessEvent( tracker, eventInfo );\n\n        for ( i = 0; i < touchCount; i++ ) {\n            gPoint = {\n                id: event.changedTouches[ i ].identifier,\n                type: 'touch',\n                currentPos: getMouseAbsolute( event.changedTouches[ i ] ),\n                currentTime: time\n            };\n\n            updatePointerMove( tracker, eventInfo, gPoint );\n        }\n\n        if ( eventInfo.preventDefault && !eventInfo.defaultPrevented ) {\n            $.cancelEvent( event );\n        }\n        if ( eventInfo.stopPropagation ) {\n            $.stopEvent( event );\n        }\n    }\n\n\n    /**\n     * @private\n     * @inner\n     */\n    function onTouchCancel( tracker, event ) {\n        var touchCount = event.changedTouches.length,\n            i,\n            gPoint;\n\n        //$.console.log('touchcancel ' + (tracker.userData ? tracker.userData.toString() : ''));\n\n        var eventInfo = {\n            originalEvent: event,\n            eventType: 'pointercancel',\n            pointerType: 'touch',\n            isEmulated: false\n        };\n        preProcessEvent( tracker, eventInfo );\n\n        for ( i = 0; i < touchCount; i++ ) {\n            gPoint = {\n                id: event.changedTouches[ i ].identifier,\n                type: 'touch'\n            };\n\n            //TODO need to only do this if our element is target?\n            updatePointerCancel( tracker, eventInfo, gPoint );\n        }\n\n        if ( eventInfo.stopPropagation ) {\n            $.stopEvent( event );\n        }\n    }\n\n\n    /**\n     * @private\n     * @inner\n     */\n    function onGestureStart( tracker, event ) {\n        if ( !$.eventIsCanceled( event ) ) {\n            event.preventDefault();\n        }\n        return false;\n    }\n\n\n    /**\n     * @private\n     * @inner\n     */\n    function onGestureChange( tracker, event ) {\n        if ( !$.eventIsCanceled( event ) ) {\n            event.preventDefault();\n        }\n        return false;\n    }\n\n\n    /**\n     * @private\n     * @inner\n     */\n    function onGotPointerCapture( tracker, event ) {\n        //$.console.log('gotpointercapture ' + (tracker.userData ? tracker.userData.toString() : '') + ' ' + (event.target === tracker.element ? 'tracker.element' : ''));\n\n        var eventInfo = {\n            originalEvent: event,\n            eventType: 'gotpointercapture',\n            pointerType: getPointerType( event ),\n            isEmulated: false\n        };\n        preProcessEvent( tracker, eventInfo );\n\n        if ( event.target === tracker.element ) {\n            //$.console.log('gotpointercapture ' + (tracker.userData ? tracker.userData.toString() : ''));\n            updatePointerCaptured( tracker, {\n                id: event.pointerId,\n                type: getPointerType( event )\n            }, true );\n        }\n\n        if ( eventInfo.stopPropagation ) {\n            $.stopEvent( event );\n        }\n    }\n\n\n    /**\n     * @private\n     * @inner\n     */\n    function onLostPointerCapture( tracker, event ) {\n        //$.console.log('lostpointercapture ' + (tracker.userData ? tracker.userData.toString() : '') + ' ' + (event.target === tracker.element ? 'tracker.element' : ''));\n\n        var eventInfo = {\n            originalEvent: event,\n            eventType: 'lostpointercapture',\n            pointerType: getPointerType( event ),\n            isEmulated: false\n        };\n        preProcessEvent( tracker, eventInfo );\n\n        if ( event.target === tracker.element ) {\n            //$.console.log('lostpointercapture ' + (tracker.userData ? tracker.userData.toString() : ''));\n            updatePointerCaptured( tracker, {\n                id: event.pointerId,\n                type: getPointerType( event )\n            }, false );\n        }\n\n        if ( eventInfo.stopPropagation ) {\n            $.stopEvent( event );\n        }\n    }\n\n\n    /**\n     * Note: Called for both pointer events and legacy mouse events\n     *         ($.MouseTracker.havePointerEvents determines which)\n     *\n     * @private\n     * @inner\n     */\n    function onPointerEnter( tracker, event ) {\n        //$.console.log('pointerenter ' + (tracker.userData ? tracker.userData.toString() : ''));\n\n        var gPoint = {\n            id: getPointerId( event ),\n            type: getPointerType( event ),\n            isPrimary: getIsPrimary( event ),\n            currentPos: getMouseAbsolute( event ),\n            currentTime: $.now()\n        };\n\n        // pointerenter doesn't bubble and is not cancelable, but we call\n        //   preProcessEvent() so it's dispatched to preProcessEventHandler\n        //   if necessary\n        var eventInfo = {\n            originalEvent: event,\n            eventType: 'pointerenter',\n            pointerType: gPoint.type,\n            isEmulated: false\n        };\n        preProcessEvent( tracker, eventInfo );\n\n        updatePointerEnter( tracker, eventInfo, gPoint );\n    }\n\n\n    /**\n     * Note: Called for both pointer events and legacy mouse events\n     *         ($.MouseTracker.havePointerEvents determines which)\n     *\n     * @private\n     * @inner\n     */\n    function onPointerLeave( tracker, event ) {\n        //$.console.log('pointerleave ' + (tracker.userData ? tracker.userData.toString() : ''));\n\n        var gPoint = {\n            id: getPointerId( event ),\n            type: getPointerType( event ),\n            isPrimary: getIsPrimary( event ),\n            currentPos: getMouseAbsolute( event ),\n            currentTime: $.now()\n        };\n\n        // pointerleave doesn't bubble and is not cancelable, but we call\n        //   preProcessEvent() so it's dispatched to preProcessEventHandler\n        //   if necessary\n        var eventInfo = {\n            originalEvent: event,\n            eventType: 'pointerleave',\n            pointerType: gPoint.type,\n            isEmulated: false\n        };\n        preProcessEvent( tracker, eventInfo );\n\n        updatePointerLeave( tracker, eventInfo, gPoint );\n    }\n\n\n    /**\n     * Note: Called for both pointer events and legacy mouse events\n     *         ($.MouseTracker.havePointerEvents determines which)\n     *\n     * @private\n     * @inner\n     */\n    function onPointerOver( tracker, event ) {\n        //$.console.log('pointerover ' + (tracker.userData ? tracker.userData.toString() : '') + ' ' + (event.target === tracker.element ? 'tracker.element' : ''));\n\n        var gPoint = {\n            id: getPointerId( event ),\n            type: getPointerType( event ),\n            isPrimary: getIsPrimary( event ),\n            currentPos: getMouseAbsolute( event ),\n            currentTime: $.now()\n        };\n\n        var eventInfo = {\n            originalEvent: event,\n            eventType: 'pointerover',\n            pointerType: gPoint.type,\n            isEmulated: false\n        };\n        preProcessEvent( tracker, eventInfo );\n\n        updatePointerOver( tracker, eventInfo, gPoint );\n\n        if ( eventInfo.preventDefault && !eventInfo.defaultPrevented ) {\n            $.cancelEvent( event );\n        }\n        if ( eventInfo.stopPropagation ) {\n            $.stopEvent( event );\n        }\n    }\n\n\n    /**\n     * Note: Called for both pointer events and legacy mouse events\n     *         ($.MouseTracker.havePointerEvents determines which)\n     *\n     * @private\n     * @inner\n     */\n    function onPointerOut( tracker, event ) {\n        //$.console.log('pointerout ' + (tracker.userData ? tracker.userData.toString() : '') + ' ' + (event.target === tracker.element ? 'tracker.element' : ''));\n\n        var gPoint = {\n            id: getPointerId( event ),\n            type: getPointerType( event ),\n            isPrimary: getIsPrimary( event ),\n            currentPos: getMouseAbsolute( event ),\n            currentTime: $.now()\n        };\n\n        var eventInfo = {\n            originalEvent: event,\n            eventType: 'pointerout',\n            pointerType: gPoint.type,\n            isEmulated: false\n        };\n        preProcessEvent( tracker, eventInfo );\n\n        updatePointerOut( tracker, eventInfo, gPoint );\n\n        if ( eventInfo.preventDefault && !eventInfo.defaultPrevented ) {\n            $.cancelEvent( event );\n        }\n        if ( eventInfo.stopPropagation ) {\n            $.stopEvent( event );\n        }\n    }\n\n\n    /**\n     * Note: Called for both pointer events and legacy mouse events\n     *         ($.MouseTracker.havePointerEvents determines which)\n     *\n     * @private\n     * @inner\n     */\n    function onPointerDown( tracker, event ) {\n        var gPoint = {\n            id: getPointerId( event ),\n            type: getPointerType( event ),\n            isPrimary: getIsPrimary( event ),\n            currentPos: getMouseAbsolute( event ),\n            currentTime: $.now()\n        };\n\n        // Most browsers implicitly capture touch pointer events\n        // Note no IE versions have element.hasPointerCapture() so no implicit\n        //    pointer capture possible\n        // var implicitlyCaptured = ($.MouseTracker.havePointerEvents &&\n        //                         event.target.hasPointerCapture &&\n        //                         $.Browser.vendor !== $.BROWSERS.IE) ?\n        //                         event.target.hasPointerCapture(event.pointerId) : false;\n        var implicitlyCaptured = $.MouseTracker.havePointerEvents &&\n                                gPoint.type === 'touch' &&\n                                $.Browser.vendor !== $.BROWSERS.IE;\n\n        //$.console.log('pointerdown ' + (tracker.userData ? tracker.userData.toString() : '') + ' ' + (event.target === tracker.element ? 'tracker.element' : ''));\n\n        var eventInfo = {\n            originalEvent: event,\n            eventType: 'pointerdown',\n            pointerType: gPoint.type,\n            isEmulated: false\n        };\n        preProcessEvent( tracker, eventInfo );\n\n        updatePointerDown( tracker, eventInfo, gPoint, event.button );\n\n        if ( eventInfo.preventDefault && !eventInfo.defaultPrevented ) {\n            $.cancelEvent( event );\n        }\n        if ( eventInfo.stopPropagation ) {\n            $.stopEvent( event );\n        }\n        if ( eventInfo.shouldCapture ) {\n            if ( implicitlyCaptured ) {\n                updatePointerCaptured( tracker, gPoint, true );\n            } else {\n                capturePointer( tracker, gPoint );\n            }\n        }\n    }\n\n\n    /**\n     * Note: Called for both pointer events and legacy mouse events\n     *         ($.MouseTracker.havePointerEvents determines which)\n     *\n     * @private\n     * @inner\n     */\n    function onPointerUp( tracker, event ) {\n        handlePointerUp( tracker, event );\n    }\n\n\n    /**\n     * Note: Called for both pointer events and legacy mouse events\n     *         ($.MouseTracker.havePointerEvents determines which)\n     *\n     * This handler is attached to the window object (on the capture phase) to emulate mouse capture.\n     * onPointerUp is still attached to the tracked element, so stop propagation to avoid processing twice.\n     *\n     * @private\n     * @inner\n     */\n    function onPointerUpCaptured( tracker, event ) {\n        var pointsList = tracker.getActivePointersListByType( getPointerType( event ) );\n        if ( pointsList.getById( event.pointerId ) ) {\n            handlePointerUp( tracker, event );\n        }\n        $.stopEvent( event );\n    }\n\n\n    /**\n     * Note: Called for both pointer events and legacy mouse events\n     *         ($.MouseTracker.havePointerEvents determines which)\n     *\n     * @private\n     * @inner\n     */\n    function handlePointerUp( tracker, event ) {\n        var gPoint;\n\n        //$.console.log('pointerup ' + (tracker.userData ? tracker.userData.toString() : '') + ' ' + (event.target === tracker.element ? 'tracker.element' : ''));\n\n        gPoint = {\n            id: getPointerId( event ),\n            type: getPointerType( event ),\n            isPrimary: getIsPrimary( event ),\n            currentPos: getMouseAbsolute( event ),\n            currentTime: $.now()\n        };\n\n        var eventInfo = {\n            originalEvent: event,\n            eventType: 'pointerup',\n            pointerType: gPoint.type,\n            isEmulated: false\n        };\n        preProcessEvent( tracker, eventInfo );\n\n        updatePointerUp( tracker, eventInfo, gPoint, event.button );\n\n        if ( eventInfo.preventDefault && !eventInfo.defaultPrevented ) {\n            $.cancelEvent( event );\n        }\n        if ( eventInfo.stopPropagation ) {\n            $.stopEvent( event );\n        }\n\n        // Per spec, pointerup events are supposed to release capture. Not all browser\n        //   versions have adhered to the spec, and there's no harm in releasing\n        //   explicitly\n        if ( eventInfo.shouldReleaseCapture ) {\n            if ( event.target === tracker.element ) {\n                releasePointer( tracker, gPoint );\n            } else {\n                updatePointerCaptured( tracker, gPoint, false );\n            }\n        }\n    }\n\n\n    /**\n     * Note: Called for both pointer events and legacy mouse events\n     *         ($.MouseTracker.havePointerEvents determines which)\n     *\n     * @private\n     * @inner\n     */\n    function onPointerMove( tracker, event ) {\n        handlePointerMove( tracker, event );\n    }\n\n\n    /**\n     * Note: Called for both pointer events and legacy mouse events\n     *         ($.MouseTracker.havePointerEvents determines which)\n     *\n     * This handler is attached to the window object (on the capture phase) to emulate mouse capture.\n     * onPointerMove is still attached to the tracked element, so stop propagation to avoid processing twice.\n     *\n     * @private\n     * @inner\n     */\n    function onPointerMoveCaptured( tracker, event ) {\n        var pointsList = tracker.getActivePointersListByType( getPointerType( event ) );\n        if ( pointsList.getById( event.pointerId ) ) {\n            handlePointerMove( tracker, event );\n        }\n        $.stopEvent( event );\n    }\n\n\n    /**\n     * Note: Called for both pointer events and legacy mouse events\n     *         ($.MouseTracker.havePointerEvents determines which)\n     *\n     * @private\n     * @inner\n     */\n    function handlePointerMove( tracker, event ) {\n        // Pointer changed coordinates, button state, pressure, tilt, or contact geometry (e.g. width and height)\n\n        var gPoint = {\n            id: getPointerId( event ),\n            type: getPointerType( event ),\n            isPrimary: getIsPrimary( event ),\n            currentPos: getMouseAbsolute( event ),\n            currentTime: $.now()\n        };\n\n        var eventInfo = {\n            originalEvent: event,\n            eventType: 'pointermove',\n            pointerType: gPoint.type,\n            isEmulated: false\n        };\n        preProcessEvent( tracker, eventInfo );\n\n        updatePointerMove( tracker, eventInfo, gPoint );\n\n        if ( eventInfo.preventDefault && !eventInfo.defaultPrevented ) {\n            $.cancelEvent( event );\n        }\n        if ( eventInfo.stopPropagation ) {\n            $.stopEvent( event );\n        }\n    }\n\n\n    /**\n     * @private\n     * @inner\n     */\n    function onPointerCancel( tracker, event ) {\n        //$.console.log('pointercancel ' + (tracker.userData ? tracker.userData.toString() : '') + ' ' + (event.target === tracker.element ? 'tracker.element' : ''));\n\n        var gPoint = {\n            id: event.pointerId,\n            type: getPointerType( event )\n        };\n\n        var eventInfo = {\n            originalEvent: event,\n            eventType: 'pointercancel',\n            pointerType: gPoint.type,\n            isEmulated: false\n        };\n        preProcessEvent( tracker, eventInfo );\n\n        //TODO need to only do this if our element is target?\n        updatePointerCancel( tracker, eventInfo, gPoint );\n\n        if ( eventInfo.stopPropagation ) {\n            $.stopEvent( event );\n        }\n    }\n\n\n///////////////////////////////////////////////////////////////////////////////\n// Device-agnostic DOM event handlers\n///////////////////////////////////////////////////////////////////////////////\n\n    /**\n     * @function\n     * @private\n     * @inner\n     * @param {OpenSeadragon.MouseTracker.GesturePointList} pointsList\n     *     The GesturePointList to track the pointer in.\n     * @param {OpenSeadragon.MouseTracker.GesturePoint} gPoint\n     *      Gesture point to track.\n     * @returns {Number} Number of gesture points in pointsList.\n     */\n    function startTrackingPointer( pointsList, gPoint ) {\n        //$.console.log('startTrackingPointer *** ' + pointsList.type + ' ' + gPoint.id.toString());\n        gPoint.speed = 0;\n        gPoint.direction = 0;\n        gPoint.contactPos = gPoint.currentPos;\n        gPoint.contactTime = gPoint.currentTime;\n        gPoint.lastPos = gPoint.currentPos;\n        gPoint.lastTime = gPoint.currentTime;\n\n        return pointsList.add( gPoint );\n    }\n\n\n    /**\n     * @function\n     * @private\n     * @inner\n     * @param {OpenSeadragon.MouseTracker} tracker\n     *     A reference to the MouseTracker instance.\n     * @param {OpenSeadragon.MouseTracker.GesturePointList} pointsList\n     *     The GesturePointList to stop tracking the pointer on.\n     * @param {OpenSeadragon.MouseTracker.GesturePoint} gPoint\n     *      Gesture point to stop tracking.\n     * @returns {Number} Number of gesture points in pointsList.\n     */\n    function stopTrackingPointer( tracker, pointsList, gPoint ) {\n        //$.console.log('stopTrackingPointer *** ' + pointsList.type + ' ' + gPoint.id.toString());\n        var listLength;\n\n        var trackedGPoint = pointsList.getById( gPoint.id );\n\n        if ( trackedGPoint ) {\n            if ( trackedGPoint.captured ) {\n                $.console.warn('stopTrackingPointer() called on captured pointer');\n                releasePointer( tracker, trackedGPoint );\n            }\n\n            // If child element relinquishes capture to a parent we may get here\n            //   from a pointerleave event while a pointerup event will never be received.\n            //   In that case, we'll clean up the contact count\n            pointsList.removeContact();\n\n            listLength = pointsList.removeById( gPoint.id );\n        } else {\n            listLength = pointsList.getLength();\n        }\n\n        return listLength;\n    }\n\n\n    /**\n     * @function\n     * @private\n     * @inner\n     */\n    function getEventProcessDefaults( tracker, eventInfo ) {\n        switch ( eventInfo.eventType ) {\n            case 'pointermove':\n                eventInfo.isStoppable = true;\n                eventInfo.isCancelable = true;\n                eventInfo.preventDefault = false;\n                eventInfo.preventGesture = !tracker.hasGestureHandlers;\n                eventInfo.stopPropagation = false;\n                break;\n            case 'pointerover':\n            case 'pointerout':\n            case 'contextmenu':\n            case 'keydown':\n            case 'keyup':\n            case 'keypress':\n                eventInfo.isStoppable = true;\n                eventInfo.isCancelable = true;\n                eventInfo.preventDefault = false; // onContextMenu(), onKeyDown(), onKeyUp(), onKeyPress() may set true\n                eventInfo.preventGesture = false;\n                eventInfo.stopPropagation = false;\n                break;\n            case 'pointerdown':\n                eventInfo.isStoppable = true;\n                eventInfo.isCancelable = true;\n                eventInfo.preventDefault = false; // updatePointerDown() may set true (tracker.hasGestureHandlers)\n                eventInfo.preventGesture = !tracker.hasGestureHandlers;\n                eventInfo.stopPropagation = false;\n                break;\n            case 'pointerup':\n                eventInfo.isStoppable = true;\n                eventInfo.isCancelable = true;\n                eventInfo.preventDefault = false;\n                eventInfo.preventGesture = !tracker.hasGestureHandlers;\n                eventInfo.stopPropagation = false;\n                break;\n            case 'wheel':\n                eventInfo.isStoppable = true;\n                eventInfo.isCancelable = true;\n                eventInfo.preventDefault = false; // handleWheelEvent() may set true\n                eventInfo.preventGesture = !tracker.hasScrollHandler;\n                eventInfo.stopPropagation = false;\n                break;\n            case 'gotpointercapture':\n            case 'lostpointercapture':\n            case 'pointercancel':\n                eventInfo.isStoppable = true;\n                eventInfo.isCancelable = false;\n                eventInfo.preventDefault = false;\n                eventInfo.preventGesture = false;\n                eventInfo.stopPropagation = false;\n                break;\n            case 'click':\n                eventInfo.isStoppable = true;\n                eventInfo.isCancelable = true;\n                eventInfo.preventDefault = !!tracker.clickHandler;\n                eventInfo.preventGesture = false;\n                eventInfo.stopPropagation = false;\n                break;\n            case 'dblclick':\n                eventInfo.isStoppable = true;\n                eventInfo.isCancelable = true;\n                eventInfo.preventDefault = !!tracker.dblClickHandler;\n                eventInfo.preventGesture = false;\n                eventInfo.stopPropagation = false;\n                break;\n            case 'focus':\n            case 'blur':\n            case 'pointerenter':\n            case 'pointerleave':\n            default:\n                eventInfo.isStoppable = false;\n                eventInfo.isCancelable = false;\n                eventInfo.preventDefault = false;\n                eventInfo.preventGesture = false;\n                eventInfo.stopPropagation = false;\n                break;\n        }\n    }\n\n\n    /**\n     * Sets up for and calls preProcessEventHandler. Call with the following parameters -\n     * this function will fill in the rest of the preProcessEventHandler event object\n     * properties\n     *\n     * @function\n     * @private\n     * @inner\n     * @param {OpenSeadragon.MouseTracker} tracker\n     *     A reference to the MouseTracker instance.\n     * @param {OpenSeadragon.MouseTracker.EventProcessInfo} eventInfo\n     * @param {Object} eventInfo.originalEvent\n     * @param {String} eventInfo.eventType\n     * @param {String} eventInfo.pointerType\n     * @param {Boolean} eventInfo.isEmulated\n     */\n    function preProcessEvent( tracker, eventInfo ) {\n        eventInfo.eventSource = tracker;\n        eventInfo.eventPhase = eventInfo.originalEvent ?\n                        ((typeof eventInfo.originalEvent.eventPhase !== 'undefined') ?\n                                            eventInfo.originalEvent.eventPhase : 0) : 0;\n        eventInfo.defaultPrevented = $.eventIsCanceled( eventInfo.originalEvent );\n        eventInfo.shouldCapture = false;\n        eventInfo.shouldReleaseCapture = false;\n        eventInfo.userData = tracker.userData;\n\n        getEventProcessDefaults( tracker, eventInfo );\n\n        if ( tracker.preProcessEventHandler ) {\n            tracker.preProcessEventHandler( eventInfo );\n        }\n    }\n\n\n    /**\n     * Sets or resets the captured property on the tracked pointer matching the passed gPoint's id/type\n     *\n     * @function\n     * @private\n     * @inner\n     * @param {OpenSeadragon.MouseTracker} tracker\n     *     A reference to the MouseTracker instance.\n     * @param {Object} gPoint\n     *     An object with id and type properties describing the pointer to update.\n     * @param {Boolean} isCaptured\n     *      Value to set the captured property to.\n     */\n    function updatePointerCaptured( tracker, gPoint, isCaptured ) {\n        var pointsList = tracker.getActivePointersListByType( gPoint.type );\n        var updateGPoint = pointsList.getById( gPoint.id );\n\n        if ( updateGPoint ) {\n            if ( isCaptured && !updateGPoint.captured ) {\n                updateGPoint.captured = true;\n                pointsList.captureCount++;\n            } else if ( !isCaptured && updateGPoint.captured ) {\n                updateGPoint.captured = false;\n                pointsList.captureCount--;\n                if ( pointsList.captureCount < 0 ) {\n                    pointsList.captureCount = 0;\n                    $.console.warn('updatePointerCaptured() - pointsList.captureCount went negative');\n                }\n            }\n        } else {\n            $.console.warn('updatePointerCaptured() called on untracked pointer');\n        }\n    }\n\n\n    /**\n     * @function\n     * @private\n     * @inner\n     * @param {OpenSeadragon.MouseTracker} tracker\n     *     A reference to the MouseTracker instance.\n     * @param {OpenSeadragon.MouseTracker.EventProcessInfo} eventInfo\n     *     Processing info for originating DOM event.\n     * @param {OpenSeadragon.MouseTracker.GesturePoint} gPoint\n     *      Gesture point associated with the event.\n     */\n    function updatePointerEnter( tracker, eventInfo, gPoint ) {\n        var pointsList = tracker.getActivePointersListByType( gPoint.type ),\n            updateGPoint;\n\n        updateGPoint = pointsList.getById( gPoint.id );\n\n        if ( updateGPoint ) {\n            // Already tracking the pointer...update it\n            updateGPoint.insideElement = true;\n            updateGPoint.lastPos = updateGPoint.currentPos;\n            updateGPoint.lastTime = updateGPoint.currentTime;\n            updateGPoint.currentPos = gPoint.currentPos;\n            updateGPoint.currentTime = gPoint.currentTime;\n\n            gPoint = updateGPoint;\n        } else {\n            // Initialize for tracking and add to the tracking list\n            gPoint.captured = false; // Handled by updatePointerCaptured()\n            gPoint.insideElementPressed = false;\n            gPoint.insideElement = true;\n            startTrackingPointer( pointsList, gPoint );\n        }\n\n        // Enter (doesn't bubble and not cancelable)\n        if ( tracker.enterHandler ) {\n            tracker.enterHandler(\n                {\n                    eventSource:          tracker,\n                    pointerType:          gPoint.type,\n                    position:             getPointRelativeToAbsolute( gPoint.currentPos, tracker.element ),\n                    buttons:              pointsList.buttons,\n                    pointers:             tracker.getActivePointerCount(),\n                    insideElementPressed: gPoint.insideElementPressed,\n                    buttonDownAny:        pointsList.buttons !== 0,\n                    isTouchEvent:         gPoint.type === 'touch',\n                    originalEvent:        eventInfo.originalEvent,\n                    userData:             tracker.userData\n                }\n            );\n        }\n    }\n\n\n    /**\n     * @function\n     * @private\n     * @inner\n     * @param {OpenSeadragon.MouseTracker} tracker\n     *     A reference to the MouseTracker instance.\n     * @param {OpenSeadragon.MouseTracker.EventProcessInfo} eventInfo\n     *     Processing info for originating DOM event.\n     * @param {OpenSeadragon.MouseTracker.GesturePoint} gPoint\n     *      Gesture point associated with the event.\n     */\n    function updatePointerLeave( tracker, eventInfo, gPoint ) {\n        var pointsList = tracker.getActivePointersListByType(gPoint.type),\n            updateGPoint,\n            dispatchEventObj;\n\n        updateGPoint = pointsList.getById( gPoint.id );\n\n        if ( updateGPoint ) {\n            // Already tracking the pointer. If captured then update it, else stop tracking it\n            if ( updateGPoint.captured ) {\n                updateGPoint.insideElement = false;\n                updateGPoint.lastPos = updateGPoint.currentPos;\n                updateGPoint.lastTime = updateGPoint.currentTime;\n                updateGPoint.currentPos = gPoint.currentPos;\n                updateGPoint.currentTime = gPoint.currentTime;\n            } else {\n                stopTrackingPointer( tracker, pointsList, updateGPoint );\n            }\n\n            gPoint = updateGPoint;\n        } else {\n            gPoint.captured = false; // Handled by updatePointerCaptured()\n            gPoint.insideElementPressed = false;\n        }\n\n        // Leave (doesn't bubble and not cancelable)\n        //   Note: exitHandler is deprecated (v2.5.0), replaced by leaveHandler\n        if ( tracker.leaveHandler || tracker.exitHandler ) {\n            dispatchEventObj = {\n                eventSource:          tracker,\n                pointerType:          gPoint.type,\n                // GitHub PR: https://github.com/openseadragon/openseadragon/pull/1754 (gPoint.currentPos && )\n                position:             gPoint.currentPos && getPointRelativeToAbsolute( gPoint.currentPos, tracker.element ),\n                buttons:              pointsList.buttons,\n                pointers:             tracker.getActivePointerCount(),\n                insideElementPressed: gPoint.insideElementPressed,\n                buttonDownAny:        pointsList.buttons !== 0,\n                isTouchEvent:         gPoint.type === 'touch',\n                originalEvent:        eventInfo.originalEvent,\n                userData:             tracker.userData\n            };\n\n            if ( tracker.leaveHandler ) {\n                tracker.leaveHandler( dispatchEventObj );\n            }\n            // Deprecated\n            if ( tracker.exitHandler ) {\n                tracker.exitHandler( dispatchEventObj );\n            }\n        }\n    }\n\n\n    /**\n     * @function\n     * @private\n     * @inner\n     * @param {OpenSeadragon.MouseTracker} tracker\n     *     A reference to the MouseTracker instance.\n     * @param {OpenSeadragon.MouseTracker.EventProcessInfo} eventInfo\n     *     Processing info for originating DOM event.\n     * @param {OpenSeadragon.MouseTracker.GesturePoint} gPoint\n     *      Gesture point associated with the event.\n     */\n    function updatePointerOver( tracker, eventInfo, gPoint ) {\n        var pointsList,\n            updateGPoint;\n\n        pointsList = tracker.getActivePointersListByType( gPoint.type );\n\n        updateGPoint = pointsList.getById( gPoint.id );\n\n        if ( updateGPoint ) {\n            gPoint = updateGPoint;\n        } else {\n            gPoint.captured = false;\n            gPoint.insideElementPressed = false;\n            //gPoint.insideElement = true; // Tracked by updatePointerEnter\n        }\n\n        if ( tracker.overHandler ) {\n            // Over\n            tracker.overHandler(\n                {\n                    eventSource:          tracker,\n                    pointerType:          gPoint.type,\n                    position:             getPointRelativeToAbsolute( gPoint.currentPos, tracker.element ),\n                    buttons:              pointsList.buttons,\n                    pointers:             tracker.getActivePointerCount(),\n                    insideElementPressed: gPoint.insideElementPressed,\n                    buttonDownAny:        pointsList.buttons !== 0,\n                    isTouchEvent:         gPoint.type === 'touch',\n                    originalEvent:        eventInfo.originalEvent,\n                    userData:             tracker.userData\n                }\n            );\n        }\n    }\n\n    /**\n     * @function\n     * @private\n     * @inner\n     * @param {OpenSeadragon.MouseTracker} tracker\n     *     A reference to the MouseTracker instance.\n     * @param {OpenSeadragon.MouseTracker.EventProcessInfo} eventInfo\n     *     Processing info for originating DOM event.\n     * @param {OpenSeadragon.MouseTracker.GesturePoint} gPoint\n     *      Gesture point associated with the event.\n     */\n    function updatePointerOut( tracker, eventInfo, gPoint ) {\n        var pointsList,\n            updateGPoint;\n\n        pointsList = tracker.getActivePointersListByType(gPoint.type);\n\n        updateGPoint = pointsList.getById( gPoint.id );\n\n        if ( updateGPoint ) {\n            gPoint = updateGPoint;\n        } else {\n            gPoint.captured = false;\n            gPoint.insideElementPressed = false;\n            //gPoint.insideElement = true; // Tracked by updatePointerEnter\n        }\n\n        if ( tracker.outHandler ) {\n            // Out\n            tracker.outHandler( {\n                eventSource:          tracker,\n                pointerType:          gPoint.type,\n                position:             gPoint.currentPos && getPointRelativeToAbsolute( gPoint.currentPos, tracker.element ),\n                buttons:              pointsList.buttons,\n                pointers:             tracker.getActivePointerCount(),\n                insideElementPressed: gPoint.insideElementPressed,\n                buttonDownAny:        pointsList.buttons !== 0,\n                isTouchEvent:         gPoint.type === 'touch',\n                originalEvent:        eventInfo.originalEvent,\n                userData:             tracker.userData\n            } );\n        }\n    }\n\n\n    /**\n     * @function\n     * @private\n     * @inner\n     * @param {OpenSeadragon.MouseTracker} tracker\n     *     A reference to the MouseTracker instance.\n     * @param {OpenSeadragon.MouseTracker.EventProcessInfo} eventInfo\n     *     Processing info for originating DOM event.\n     * @param {OpenSeadragon.MouseTracker.GesturePoint} gPoint\n     *      Gesture point associated with the event.\n     * @param {Number} buttonChanged\n     *      The button involved in the event: -1: none, 0: primary/left, 1: aux/middle, 2: secondary/right, 3: X1/back, 4: X2/forward, 5: pen eraser.\n     *      Note on chorded button presses (a button pressed when another button is already pressed): In the W3C Pointer Events model,\n     *      only one pointerdown/pointerup event combo is fired. Chorded button state changes instead fire pointermove events.\n     */\n    function updatePointerDown( tracker, eventInfo, gPoint, buttonChanged ) {\n        var delegate = THIS[ tracker.hash ],\n            pointsList = tracker.getActivePointersListByType( gPoint.type ),\n            updateGPoint;\n\n        if ( typeof eventInfo.originalEvent.buttons !== 'undefined' ) {\n            pointsList.buttons = eventInfo.originalEvent.buttons;\n        } else {\n            if ( buttonChanged === 0 ) {\n                // Primary\n                pointsList.buttons |= 1;\n            } else if ( buttonChanged === 1 ) {\n                // Aux\n                pointsList.buttons |= 4;\n            } else if ( buttonChanged === 2 ) {\n                // Secondary\n                pointsList.buttons |= 2;\n            } else if ( buttonChanged === 3 ) {\n                // X1 (Back)\n                pointsList.buttons |= 8;\n            } else if ( buttonChanged === 4 ) {\n                // X2 (Forward)\n                pointsList.buttons |= 16;\n            } else if ( buttonChanged === 5 ) {\n                // Pen Eraser\n                pointsList.buttons |= 32;\n            }\n        }\n\n        // Only capture and track primary button, pen, and touch contacts\n        if ( buttonChanged !== 0 ) {\n            eventInfo.shouldCapture = false;\n            eventInfo.shouldReleaseCapture = false;\n\n            // Aux Press\n            if ( tracker.nonPrimaryPressHandler &&\n                                !eventInfo.preventGesture &&\n                                !eventInfo.defaultPrevented ) {\n                eventInfo.preventDefault = true;\n\n                tracker.nonPrimaryPressHandler(\n                    {\n                        eventSource:          tracker,\n                        pointerType:          gPoint.type,\n                        position:             getPointRelativeToAbsolute( gPoint.currentPos, tracker.element ),\n                        button:               buttonChanged,\n                        buttons:              pointsList.buttons,\n                        isTouchEvent:         gPoint.type === 'touch',\n                        originalEvent:        eventInfo.originalEvent,\n                        userData:             tracker.userData\n                    }\n                );\n            }\n\n            return;\n        }\n\n        updateGPoint = pointsList.getById( gPoint.id );\n\n        if ( updateGPoint ) {\n            // Already tracking the pointer...update it\n            //updateGPoint.captured = true; // Handled by updatePointerCaptured()\n            updateGPoint.insideElementPressed = true;\n            updateGPoint.insideElement = true;\n            updateGPoint.originalTarget = eventInfo.originalEvent.target;\n            updateGPoint.contactPos = gPoint.currentPos;\n            updateGPoint.contactTime = gPoint.currentTime;\n            updateGPoint.lastPos = updateGPoint.currentPos;\n            updateGPoint.lastTime = updateGPoint.currentTime;\n            updateGPoint.currentPos = gPoint.currentPos;\n            updateGPoint.currentTime = gPoint.currentTime;\n\n            gPoint = updateGPoint;\n        } else {\n            // Initialize for tracking and add to the tracking list (no pointerenter event occurred before this)\n            // NOTE: pointerdown event on untracked pointer\n            gPoint.captured = false; // Handled by updatePointerCaptured()\n            gPoint.insideElementPressed = true;\n            gPoint.insideElement = true;\n            gPoint.originalTarget = eventInfo.originalEvent.target;\n            startTrackingPointer( pointsList, gPoint );\n        }\n\n        pointsList.addContact();\n        //$.console.log('contacts++ ', pointsList.contacts);\n\n        if ( !eventInfo.preventGesture && !eventInfo.defaultPrevented ) {\n            eventInfo.shouldCapture = true;\n            eventInfo.shouldReleaseCapture = false;\n            eventInfo.preventDefault = true;\n\n            if ( tracker.dragHandler || tracker.dragEndHandler || tracker.pinchHandler ) {\n                $.MouseTracker.gesturePointVelocityTracker.addPoint( tracker, gPoint );\n            }\n\n            if ( pointsList.contacts === 1 ) {\n                // Press\n                if ( tracker.pressHandler && !eventInfo.preventGesture ) {\n                    tracker.pressHandler(\n                        {\n                            eventSource:          tracker,\n                            pointerType:          gPoint.type,\n                            position:             getPointRelativeToAbsolute( gPoint.contactPos, tracker.element ),\n                            buttons:              pointsList.buttons,\n                            isTouchEvent:         gPoint.type === 'touch',\n                            originalEvent:        eventInfo.originalEvent,\n                            userData:             tracker.userData\n                        }\n                    );\n                }\n            } else if ( pointsList.contacts === 2 ) {\n                if ( tracker.pinchHandler && gPoint.type === 'touch' ) {\n                    // Initialize for pinch\n                    delegate.pinchGPoints = pointsList.asArray();\n                    delegate.lastPinchDist = delegate.currentPinchDist = delegate.pinchGPoints[ 0 ].currentPos.distanceTo( delegate.pinchGPoints[ 1 ].currentPos );\n                    delegate.lastPinchCenter = delegate.currentPinchCenter = getCenterPoint( delegate.pinchGPoints[ 0 ].currentPos, delegate.pinchGPoints[ 1 ].currentPos );\n                }\n            }\n        } else {\n            eventInfo.shouldCapture = false;\n            eventInfo.shouldReleaseCapture = false;\n        }\n    }\n\n\n    /**\n     * @function\n     * @private\n     * @inner\n     * @param {OpenSeadragon.MouseTracker} tracker\n     *     A reference to the MouseTracker instance.\n     * @param {OpenSeadragon.MouseTracker.EventProcessInfo} eventInfo\n     *     Processing info for originating DOM event.\n     * @param {OpenSeadragon.MouseTracker.GesturePoint} gPoint\n     *      Gesture points associated with the event.\n     * @param {Number} buttonChanged\n     *      The button involved in the event: -1: none, 0: primary/left, 1: aux/middle, 2: secondary/right, 3: X1/back, 4: X2/forward, 5: pen eraser.\n     *      Note on chorded button presses (a button pressed when another button is already pressed): In the W3C Pointer Events model,\n     *      only one pointerdown/pointerup event combo is fired. Chorded button state changes instead fire pointermove events.\n     */\n    function updatePointerUp( tracker, eventInfo, gPoint, buttonChanged ) {\n        var delegate = THIS[ tracker.hash ],\n            pointsList = tracker.getActivePointersListByType( gPoint.type ),\n            releasePoint,\n            releaseTime,\n            updateGPoint,\n            wasCaptured = false,\n            quick;\n\n        if ( typeof eventInfo.originalEvent.buttons !== 'undefined' ) {\n            pointsList.buttons = eventInfo.originalEvent.buttons;\n        } else {\n            if ( buttonChanged === 0 ) {\n                // Primary\n                pointsList.buttons ^= ~1;\n            } else if ( buttonChanged === 1 ) {\n                // Aux\n                pointsList.buttons ^= ~4;\n            } else if ( buttonChanged === 2 ) {\n                // Secondary\n                pointsList.buttons ^= ~2;\n            } else if ( buttonChanged === 3 ) {\n                // X1 (Back)\n                pointsList.buttons ^= ~8;\n            } else if ( buttonChanged === 4 ) {\n                // X2 (Forward)\n                pointsList.buttons ^= ~16;\n            } else if ( buttonChanged === 5 ) {\n                // Pen Eraser\n                pointsList.buttons ^= ~32;\n            }\n        }\n\n        eventInfo.shouldCapture = false;\n\n        // Only capture and track primary button, pen, and touch contacts\n        if ( buttonChanged !== 0 ) {\n            eventInfo.shouldReleaseCapture = false;\n\n            // Aux Release\n            if ( tracker.nonPrimaryReleaseHandler &&\n                                !eventInfo.preventGesture &&\n                                !eventInfo.defaultPrevented ) {\n                eventInfo.preventDefault = true;\n\n                tracker.nonPrimaryReleaseHandler(\n                    {\n                        eventSource:           tracker,\n                        pointerType:           gPoint.type,\n                        position:              getPointRelativeToAbsolute(gPoint.currentPos, tracker.element),\n                        button:                buttonChanged,\n                        buttons:               pointsList.buttons,\n                        isTouchEvent:          gPoint.type === 'touch',\n                        originalEvent:         eventInfo.originalEvent,\n                        userData:              tracker.userData\n                    }\n                );\n            }\n\n            return;\n        }\n\n        updateGPoint = pointsList.getById( gPoint.id );\n\n        if ( updateGPoint ) {\n            pointsList.removeContact();\n            //$.console.log('contacts-- ', pointsList.contacts);\n\n            // Update the pointer, stop tracking it if not still in this element\n            if ( updateGPoint.captured ) {\n                //updateGPoint.captured = false; // Handled by updatePointerCaptured()\n                wasCaptured = true;\n            }\n            updateGPoint.lastPos = updateGPoint.currentPos;\n            updateGPoint.lastTime = updateGPoint.currentTime;\n            updateGPoint.currentPos = gPoint.currentPos;\n            updateGPoint.currentTime = gPoint.currentTime;\n            if ( !updateGPoint.insideElement ) {\n                stopTrackingPointer( tracker, pointsList, updateGPoint );\n            }\n\n            releasePoint = updateGPoint.currentPos;\n            releaseTime = updateGPoint.currentTime;\n        } else {\n            // NOTE: updatePointerUp(): pointerup on untracked gPoint\n            // ...we'll start to track pointer again\n            gPoint.captured = false; // Handled by updatePointerCaptured()\n            gPoint.insideElementPressed = false;\n            gPoint.insideElement = true;\n            startTrackingPointer( pointsList, gPoint );\n\n            updateGPoint = gPoint;\n        }\n\n        if ( !eventInfo.preventGesture && !eventInfo.defaultPrevented ) {\n            if ( wasCaptured ) {\n                // Pointer was activated in our element but could have been removed in any element since events are captured to our element\n\n                eventInfo.shouldReleaseCapture = true;\n                eventInfo.preventDefault = true;\n\n                if ( tracker.dragHandler || tracker.dragEndHandler || tracker.pinchHandler ) {\n                    $.MouseTracker.gesturePointVelocityTracker.removePoint( tracker, updateGPoint );\n                }\n\n                if ( pointsList.contacts === 0 ) {\n\n                    // Release (pressed in our element)\n                    if ( tracker.releaseHandler && releasePoint ) {\n                        tracker.releaseHandler(\n                            {\n                                eventSource:           tracker,\n                                pointerType:           updateGPoint.type,\n                                position:              getPointRelativeToAbsolute( releasePoint, tracker.element ),\n                                buttons:               pointsList.buttons,\n                                insideElementPressed:  updateGPoint.insideElementPressed,\n                                insideElementReleased: updateGPoint.insideElement,\n                                isTouchEvent:          updateGPoint.type === 'touch',\n                                originalEvent:         eventInfo.originalEvent,\n                                userData:              tracker.userData\n                            }\n                        );\n                    }\n\n                    // Drag End\n                    if ( tracker.dragEndHandler && delegate.sentDragEvent ) {\n                        tracker.dragEndHandler(\n                            {\n                                eventSource:          tracker,\n                                pointerType:          updateGPoint.type,\n                                position:             getPointRelativeToAbsolute( updateGPoint.currentPos, tracker.element ),\n                                speed:                updateGPoint.speed,\n                                direction:            updateGPoint.direction,\n                                shift:                eventInfo.originalEvent.shiftKey,\n                                isTouchEvent:         updateGPoint.type === 'touch',\n                                originalEvent:        eventInfo.originalEvent,\n                                userData:             tracker.userData\n                            }\n                        );\n                    }\n\n                    // We want to clear this flag regardless of whether we fired the dragEndHandler\n                    delegate.sentDragEvent = false;\n\n                    // Click / Double-Click\n                    if ( ( tracker.clickHandler || tracker.dblClickHandler ) && updateGPoint.insideElement ) {\n                        quick = releaseTime - updateGPoint.contactTime <= tracker.clickTimeThreshold &&\n                                        updateGPoint.contactPos.distanceTo( releasePoint ) <= tracker.clickDistThreshold;\n\n                        // Click\n                        if ( tracker.clickHandler ) {\n                            tracker.clickHandler(\n                                {\n                                    eventSource:          tracker,\n                                    pointerType:          updateGPoint.type,\n                                    position:             getPointRelativeToAbsolute( updateGPoint.currentPos, tracker.element ),\n                                    quick:                quick,\n                                    shift:                eventInfo.originalEvent.shiftKey,\n                                    isTouchEvent:         updateGPoint.type === 'touch',\n                                    originalEvent:        eventInfo.originalEvent,\n                                    originalTarget:       updateGPoint.originalTarget,\n                                    userData:             tracker.userData\n                                }\n                            );\n                        }\n\n                        // Double-Click\n                        if ( tracker.dblClickHandler && quick ) {\n                            pointsList.clicks++;\n                            if ( pointsList.clicks === 1 ) {\n                                delegate.lastClickPos = releasePoint;\n                                /*jshint loopfunc:true*/\n                                delegate.dblClickTimeOut = setTimeout( function() {\n                                    pointsList.clicks = 0;\n                                }, tracker.dblClickTimeThreshold );\n                                /*jshint loopfunc:false*/\n                            } else if ( pointsList.clicks === 2 ) {\n                                clearTimeout( delegate.dblClickTimeOut );\n                                pointsList.clicks = 0;\n                                if ( delegate.lastClickPos.distanceTo( releasePoint ) <= tracker.dblClickDistThreshold ) {\n                                    tracker.dblClickHandler(\n                                        {\n                                            eventSource:          tracker,\n                                            pointerType:          updateGPoint.type,\n                                            position:             getPointRelativeToAbsolute( updateGPoint.currentPos, tracker.element ),\n                                            shift:                eventInfo.originalEvent.shiftKey,\n                                            isTouchEvent:         updateGPoint.type === 'touch',\n                                            originalEvent:        eventInfo.originalEvent,\n                                            userData:             tracker.userData\n                                        }\n                                    );\n                                }\n                                delegate.lastClickPos = null;\n                            }\n                        }\n                    }\n                } else if ( pointsList.contacts === 2 ) {\n                    if ( tracker.pinchHandler && updateGPoint.type === 'touch' ) {\n                        // Reset for pinch\n                        delegate.pinchGPoints = pointsList.asArray();\n                        delegate.lastPinchDist = delegate.currentPinchDist = delegate.pinchGPoints[ 0 ].currentPos.distanceTo( delegate.pinchGPoints[ 1 ].currentPos );\n                        delegate.lastPinchCenter = delegate.currentPinchCenter = getCenterPoint( delegate.pinchGPoints[ 0 ].currentPos, delegate.pinchGPoints[ 1 ].currentPos );\n                    }\n                }\n            } else {\n                // Pointer was activated in another element but removed in our element\n\n                eventInfo.shouldReleaseCapture = false;\n\n                // Release (pressed in another element)\n                if ( tracker.releaseHandler && releasePoint ) {\n                    tracker.releaseHandler(\n                        {\n                            eventSource:           tracker,\n                            pointerType:           updateGPoint.type,\n                            position:              getPointRelativeToAbsolute( releasePoint, tracker.element ),\n                            buttons:               pointsList.buttons,\n                            insideElementPressed:  updateGPoint.insideElementPressed,\n                            insideElementReleased: updateGPoint.insideElement,\n                            isTouchEvent:          updateGPoint.type === 'touch',\n                            originalEvent:         eventInfo.originalEvent,\n                            userData:              tracker.userData\n                        }\n                    );\n                    eventInfo.preventDefault = true;\n                }\n            }\n        }\n    }\n\n\n    /**\n     * Call when pointer(s) change coordinates, button state, pressure, tilt, or contact geometry (e.g. width and height)\n     *\n     * @function\n     * @private\n     * @inner\n     * @param {OpenSeadragon.MouseTracker} tracker\n     *     A reference to the MouseTracker instance.\n     * @param {OpenSeadragon.MouseTracker.EventProcessInfo} eventInfo\n     *     Processing info for originating DOM event.\n     * @param {OpenSeadragon.MouseTracker.GesturePoint} gPoint\n     *      Gesture points associated with the event.\n     */\n    function updatePointerMove( tracker, eventInfo, gPoint ) {\n        var delegate = THIS[ tracker.hash ],\n            pointsList = tracker.getActivePointersListByType( gPoint.type ),\n            updateGPoint,\n            gPointArray,\n            delta;\n\n        if ( typeof eventInfo.originalEvent.buttons !== 'undefined' ) {\n            pointsList.buttons = eventInfo.originalEvent.buttons;\n        }\n\n        updateGPoint = pointsList.getById( gPoint.id );\n\n        if ( updateGPoint ) {\n            // Already tracking the pointer...update it\n            updateGPoint.lastPos = updateGPoint.currentPos;\n            updateGPoint.lastTime = updateGPoint.currentTime;\n            updateGPoint.currentPos = gPoint.currentPos;\n            updateGPoint.currentTime = gPoint.currentTime;\n        } else {\n            // Should never get here, but due to user agent bugs (e.g. legacy touch) it sometimes happens\n            return;\n        }\n\n        eventInfo.shouldCapture = false;\n        eventInfo.shouldReleaseCapture = false;\n\n        // Stop (mouse only)\n        if ( tracker.stopHandler && gPoint.type === 'mouse' ) {\n            clearTimeout( tracker.stopTimeOut );\n            tracker.stopTimeOut = setTimeout( function() {\n                handlePointerStop( tracker, eventInfo.originalEvent, gPoint.type );\n            }, tracker.stopDelay );\n        }\n\n        if ( pointsList.contacts === 0 ) {\n            // Move (no contacts: hovering mouse or other hover-capable device)\n            if ( tracker.moveHandler ) {\n                tracker.moveHandler(\n                    {\n                        eventSource:          tracker,\n                        pointerType:          gPoint.type,\n                        position:             getPointRelativeToAbsolute( gPoint.currentPos, tracker.element ),\n                        buttons:              pointsList.buttons,\n                        isTouchEvent:         gPoint.type === 'touch',\n                        originalEvent:        eventInfo.originalEvent,\n                        userData:             tracker.userData\n                    }\n                );\n            }\n        } else if ( pointsList.contacts === 1 ) {\n            // Move (1 contact)\n            if ( tracker.moveHandler ) {\n                updateGPoint = pointsList.asArray()[ 0 ];\n                tracker.moveHandler(\n                    {\n                        eventSource:          tracker,\n                        pointerType:          updateGPoint.type,\n                        position:             getPointRelativeToAbsolute( updateGPoint.currentPos, tracker.element ),\n                        buttons:              pointsList.buttons,\n                        isTouchEvent:         updateGPoint.type === 'touch',\n                        originalEvent:        eventInfo.originalEvent,\n                        userData:             tracker.userData\n                    }\n                );\n            }\n\n            // Drag\n            if ( tracker.dragHandler && !eventInfo.preventGesture && !eventInfo.defaultPrevented ) {\n                updateGPoint = pointsList.asArray()[ 0 ];\n                delta = updateGPoint.currentPos.minus( updateGPoint.lastPos );\n                tracker.dragHandler(\n                    {\n                        eventSource:          tracker,\n                        pointerType:          updateGPoint.type,\n                        position:             getPointRelativeToAbsolute( updateGPoint.currentPos, tracker.element ),\n                        buttons:              pointsList.buttons,\n                        delta:                delta,\n                        speed:                updateGPoint.speed,\n                        direction:            updateGPoint.direction,\n                        shift:                eventInfo.originalEvent.shiftKey,\n                        isTouchEvent:         updateGPoint.type === 'touch',\n                        originalEvent:        eventInfo.originalEvent,\n                        userData:             tracker.userData\n                    }\n                );\n                eventInfo.preventDefault = true;\n                delegate.sentDragEvent = true;\n            }\n        } else if ( pointsList.contacts === 2 ) {\n            // Move (2 contacts, use center)\n            if ( tracker.moveHandler ) {\n                gPointArray = pointsList.asArray();\n                tracker.moveHandler(\n                    {\n                        eventSource:          tracker,\n                        pointerType:          gPointArray[ 0 ].type,\n                        position:             getPointRelativeToAbsolute( getCenterPoint( gPointArray[ 0 ].currentPos, gPointArray[ 1 ].currentPos ), tracker.element ),\n                        buttons:              pointsList.buttons,\n                        isTouchEvent:         gPointArray[ 0 ].type === 'touch',\n                        originalEvent:        eventInfo.originalEvent,\n                        userData:             tracker.userData\n                    }\n                );\n            }\n\n            // Pinch\n            if ( tracker.pinchHandler && gPoint.type === 'touch' &&\n                                !eventInfo.preventGesture && !eventInfo.defaultPrevented ) {\n                delta = delegate.pinchGPoints[ 0 ].currentPos.distanceTo( delegate.pinchGPoints[ 1 ].currentPos );\n                if ( delta !== delegate.currentPinchDist ) {\n                    delegate.lastPinchDist = delegate.currentPinchDist;\n                    delegate.currentPinchDist = delta;\n                    delegate.lastPinchCenter = delegate.currentPinchCenter;\n                    delegate.currentPinchCenter = getCenterPoint( delegate.pinchGPoints[ 0 ].currentPos, delegate.pinchGPoints[ 1 ].currentPos );\n                    tracker.pinchHandler(\n                        {\n                            eventSource:          tracker,\n                            pointerType:          'touch',\n                            gesturePoints:        delegate.pinchGPoints,\n                            lastCenter:           getPointRelativeToAbsolute( delegate.lastPinchCenter, tracker.element ),\n                            center:               getPointRelativeToAbsolute( delegate.currentPinchCenter, tracker.element ),\n                            lastDistance:         delegate.lastPinchDist,\n                            distance:             delegate.currentPinchDist,\n                            shift:                eventInfo.originalEvent.shiftKey,\n                            originalEvent:        eventInfo.originalEvent,\n                            userData:             tracker.userData\n                        }\n                    );\n                    eventInfo.preventDefault = true;\n                }\n            }\n        }\n    }\n\n\n    /**\n     * @function\n     * @private\n     * @inner\n     * @param {OpenSeadragon.MouseTracker} tracker\n     *     A reference to the MouseTracker instance.\n     * @param {OpenSeadragon.MouseTracker.EventProcessInfo} eventInfo\n     *     Processing info for originating DOM event.\n     * @param {OpenSeadragon.MouseTracker.GesturePoint} gPoint\n     *      Gesture points associated with the event.\n     */\n    function updatePointerCancel( tracker, eventInfo, gPoint ) {\n        var pointsList = tracker.getActivePointersListByType( gPoint.type ),\n            updateGPoint;\n\n        updateGPoint = pointsList.getById( gPoint.id );\n\n        if ( updateGPoint ) {\n            stopTrackingPointer( tracker, pointsList, updateGPoint );\n        }\n    }\n\n\n    /**\n     * @private\n     * @inner\n     */\n    function handlePointerStop( tracker, originalMoveEvent, pointerType ) {\n        if ( tracker.stopHandler ) {\n            tracker.stopHandler( {\n                eventSource:          tracker,\n                pointerType:          pointerType,\n                position:             getMouseRelative( originalMoveEvent, tracker.element ),\n                buttons:              tracker.getActivePointersListByType( pointerType ).buttons,\n                isTouchEvent:         pointerType === 'touch',\n                originalEvent:        originalMoveEvent,\n                userData:             tracker.userData\n            } );\n        }\n    }\n\n}(OpenSeadragon));\n\n/*\n * OpenSeadragon - Control\n *\n * Copyright (C) 2009 CodePlex Foundation\n * Copyright (C) 2010-2013 OpenSeadragon contributors\n *\n * Redistribution and use in source and binary forms, with or without\n * modification, are permitted provided that the following conditions are\n * met:\n *\n * - Redistributions of source code must retain the above copyright notice,\n *   this list of conditions and the following disclaimer.\n *\n * - Redistributions in binary form must reproduce the above copyright\n *   notice, this list of conditions and the following disclaimer in the\n *   documentation and/or other materials provided with the distribution.\n *\n * - Neither the name of CodePlex Foundation nor the names of its\n *   contributors may be used to endorse or promote products derived from\n *   this software without specific prior written permission.\n *\n * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS\n * \"AS IS\" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT\n * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR\n * A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT\n * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,\n * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED\n * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR\n * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF\n * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING\n * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS\n * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.\n */\n\n(function( $ ){\n\n/**\n * An enumeration of supported locations where controls can be anchored.\n * The anchoring is always relative to the container.\n * @member ControlAnchor\n * @memberof OpenSeadragon\n * @static\n * @type {Object}\n * @property {Number} NONE\n * @property {Number} TOP_LEFT\n * @property {Number} TOP_RIGHT\n * @property {Number} BOTTOM_LEFT\n * @property {Number} BOTTOM_RIGHT\n * @property {Number} ABSOLUTE\n */\n$.ControlAnchor = {\n    NONE: 0,\n    TOP_LEFT: 1,\n    TOP_RIGHT: 2,\n    BOTTOM_RIGHT: 3,\n    BOTTOM_LEFT: 4,\n    ABSOLUTE: 5\n};\n\n/**\n * @class Control\n * @classdesc A Control represents any interface element which is meant to allow the user\n * to interact with the zoomable interface. Any control can be anchored to any\n * element.\n *\n * @memberof OpenSeadragon\n * @param {Element} element - the control element to be anchored in the container.\n * @param {Object } options - All required and optional settings for configuring a control element.\n * @param {OpenSeadragon.ControlAnchor} [options.anchor=OpenSeadragon.ControlAnchor.NONE] - the position of the control\n *  relative to the container.\n * @param {Boolean} [options.attachToViewer=true] - Whether the control should be added directly to the viewer, or\n *  directly to the container\n * @param {Boolean} [options.autoFade=true] - Whether the control should have the autofade behavior\n * @param {Element} container - the element to control will be anchored too.\n */\n$.Control = function ( element, options, container ) {\n    var parent = element.parentNode;\n    if (typeof options === 'number')\n    {\n        $.console.error(\"Passing an anchor directly into the OpenSeadragon.Control constructor is deprecated; \" +\n                        \"please use an options object instead.  \" +\n                        \"Support for this deprecated variant is scheduled for removal in December 2013\");\n         options = {anchor: options};\n    }\n    options.attachToViewer = (typeof options.attachToViewer === 'undefined') ? true : options.attachToViewer;\n    /**\n     * True if the control should have autofade behavior.\n     * @member {Boolean} autoFade\n     * @memberof OpenSeadragon.Control#\n     */\n    this.autoFade = (typeof options.autoFade === 'undefined') ? true : options.autoFade;\n    /**\n     * The element providing the user interface with some type of control (e.g. a zoom-in button).\n     * @member {Element} element\n     * @memberof OpenSeadragon.Control#\n     */\n    this.element    = element;\n    /**\n     * The position of the Control relative to its container.\n     * @member {OpenSeadragon.ControlAnchor} anchor\n     * @memberof OpenSeadragon.Control#\n     */\n    this.anchor     = options.anchor;\n    /**\n     * The Control's containing element.\n     * @member {Element} container\n     * @memberof OpenSeadragon.Control#\n     */\n    this.container  = container;\n    /**\n     * A neutral element surrounding the control element.\n     * @member {Element} wrapper\n     * @memberof OpenSeadragon.Control#\n     */\n    if ( this.anchor === $.ControlAnchor.ABSOLUTE ) {\n        this.wrapper    = $.makeNeutralElement( \"div\" );\n        this.wrapper.style.position = \"absolute\";\n        this.wrapper.style.top = typeof (options.top) === \"number\" ? (options.top + 'px') : options.top;\n        this.wrapper.style.left  = typeof (options.left) === \"number\" ? (options.left + 'px') : options.left;\n        this.wrapper.style.height = typeof (options.height) === \"number\" ? (options.height + 'px') : options.height;\n        this.wrapper.style.width  = typeof (options.width) === \"number\" ? (options.width + 'px') : options.width;\n        this.wrapper.style.margin = \"0px\";\n        this.wrapper.style.padding = \"0px\";\n\n        this.element.style.position = \"relative\";\n        this.element.style.top = \"0px\";\n        this.element.style.left = \"0px\";\n        this.element.style.height = \"100%\";\n        this.element.style.width = \"100%\";\n    } else {\n        this.wrapper    = $.makeNeutralElement( \"div\" );\n        this.wrapper.style.display = \"inline-block\";\n        if ( this.anchor === $.ControlAnchor.NONE ) {\n            // IE6 fix\n            this.wrapper.style.width = this.wrapper.style.height = \"100%\";\n        }\n    }\n    this.wrapper.appendChild( this.element );\n\n    if (options.attachToViewer ) {\n        if ( this.anchor === $.ControlAnchor.TOP_RIGHT ||\n             this.anchor === $.ControlAnchor.BOTTOM_RIGHT ) {\n            this.container.insertBefore(\n                this.wrapper,\n                this.container.firstChild\n            );\n        } else {\n            this.container.appendChild( this.wrapper );\n        }\n    } else {\n        parent.appendChild( this.wrapper );\n    }\n};\n\n/** @lends OpenSeadragon.Control.prototype */\n$.Control.prototype = {\n\n    /**\n     * Removes the control from the container.\n     * @function\n     */\n    destroy: function() {\n        this.wrapper.removeChild( this.element );\n        if (this.anchor !== $.ControlAnchor.NONE) {\n            this.container.removeChild(this.wrapper);\n        }\n    },\n\n    /**\n     * Determines if the control is currently visible.\n     * @function\n     * @return {Boolean} true if currently visible, false otherwise.\n     */\n    isVisible: function() {\n        return this.wrapper.style.display !== \"none\";\n    },\n\n    /**\n     * Toggles the visibility of the control.\n     * @function\n     * @param {Boolean} visible - true to make visible, false to hide.\n     */\n    setVisible: function( visible ) {\n        this.wrapper.style.display = visible ?\n            ( this.anchor === $.ControlAnchor.ABSOLUTE ? 'block' : 'inline-block' ) :\n            \"none\";\n    },\n\n    /**\n     * Sets the opacity level for the control.\n     * @function\n     * @param {Number} opactiy - a value between 1 and 0 inclusively.\n     */\n    setOpacity: function( opacity ) {\n        if ( this.element[ $.SIGNAL ] && $.Browser.vendor === $.BROWSERS.IE ) {\n            $.setElementOpacity( this.element, opacity, true );\n        } else {\n            $.setElementOpacity( this.wrapper, opacity, true );\n        }\n    }\n};\n\n}( OpenSeadragon ));\n\n/*\n * OpenSeadragon - ControlDock\n *\n * Copyright (C) 2009 CodePlex Foundation\n * Copyright (C) 2010-2013 OpenSeadragon contributors\n *\n * Redistribution and use in source and binary forms, with or without\n * modification, are permitted provided that the following conditions are\n * met:\n *\n * - Redistributions of source code must retain the above copyright notice,\n *   this list of conditions and the following disclaimer.\n *\n * - Redistributions in binary form must reproduce the above copyright\n *   notice, this list of conditions and the following disclaimer in the\n *   documentation and/or other materials provided with the distribution.\n *\n * - Neither the name of CodePlex Foundation nor the names of its\n *   contributors may be used to endorse or promote products derived from\n *   this software without specific prior written permission.\n *\n * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS\n * \"AS IS\" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT\n * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR\n * A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT\n * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,\n * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED\n * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR\n * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF\n * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING\n * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS\n * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.\n */\n\n(function( $ ){\n    /**\n     * @class ControlDock\n     * @classdesc Provides a container element (a &lt;form&gt; element) with support for the layout of control elements.\n     *\n     * @memberof OpenSeadragon\n     */\n    $.ControlDock = function( options ){\n        var layouts = [ 'topleft', 'topright', 'bottomright', 'bottomleft'],\n            layout,\n            i;\n\n        $.extend( true, this, {\n            id: 'controldock-' + $.now() + '-' + Math.floor(Math.random() * 1000000),\n            container: $.makeNeutralElement( 'div' ),\n            controls: []\n        }, options );\n\n        // Disable the form's submit; otherwise button clicks and return keys\n        // can trigger it.\n        this.container.onsubmit = function() {\n            return false;\n        };\n\n        if( this.element ){\n            this.element = $.getElement( this.element );\n            this.element.appendChild( this.container );\n            this.element.style.position = 'relative';\n            this.container.style.width = '100%';\n            this.container.style.height = '100%';\n        }\n\n        for( i = 0; i < layouts.length; i++ ){\n            layout = layouts[ i ];\n            this.controls[ layout ] = $.makeNeutralElement( \"div\" );\n            this.controls[ layout ].style.position = 'absolute';\n            if ( layout.match( 'left' ) ){\n                this.controls[ layout ].style.left = '0px';\n            }\n            if ( layout.match( 'right' ) ){\n                this.controls[ layout ].style.right = '0px';\n            }\n            if ( layout.match( 'top' ) ){\n                this.controls[ layout ].style.top = '0px';\n            }\n            if ( layout.match( 'bottom' ) ){\n                this.controls[ layout ].style.bottom = '0px';\n            }\n        }\n\n        this.container.appendChild( this.controls.topleft );\n        this.container.appendChild( this.controls.topright );\n        this.container.appendChild( this.controls.bottomright );\n        this.container.appendChild( this.controls.bottomleft );\n    };\n\n    /** @lends OpenSeadragon.ControlDock.prototype */\n    $.ControlDock.prototype = {\n\n        /**\n         * @function\n         */\n        addControl: function ( element, controlOptions ) {\n            element = $.getElement( element );\n            var div = null;\n\n            if ( getControlIndex( this, element ) >= 0 ) {\n                return;     // they're trying to add a duplicate control\n            }\n\n            switch ( controlOptions.anchor ) {\n                case $.ControlAnchor.TOP_RIGHT:\n                    div = this.controls.topright;\n                    element.style.position = \"relative\";\n                    element.style.paddingRight = \"0px\";\n                    element.style.paddingTop = \"0px\";\n                    break;\n                case $.ControlAnchor.BOTTOM_RIGHT:\n                    div = this.controls.bottomright;\n                    element.style.position = \"relative\";\n                    element.style.paddingRight = \"0px\";\n                    element.style.paddingBottom = \"0px\";\n                    break;\n                case $.ControlAnchor.BOTTOM_LEFT:\n                    div = this.controls.bottomleft;\n                    element.style.position = \"relative\";\n                    element.style.paddingLeft = \"0px\";\n                    element.style.paddingBottom = \"0px\";\n                    break;\n                case $.ControlAnchor.TOP_LEFT:\n                    div = this.controls.topleft;\n                    element.style.position = \"relative\";\n                    element.style.paddingLeft = \"0px\";\n                    element.style.paddingTop = \"0px\";\n                    break;\n                case $.ControlAnchor.ABSOLUTE:\n                    div = this.container;\n                    element.style.margin = \"0px\";\n                    element.style.padding = \"0px\";\n                    break;\n                default:\n                case $.ControlAnchor.NONE:\n                    div = this.container;\n                    element.style.margin = \"0px\";\n                    element.style.padding = \"0px\";\n                    break;\n            }\n\n            this.controls.push(\n                new $.Control( element, controlOptions, div )\n            );\n            element.style.display = \"inline-block\";\n        },\n\n\n        /**\n         * @function\n         * @return {OpenSeadragon.ControlDock} Chainable.\n         */\n        removeControl: function ( element ) {\n            element = $.getElement( element );\n            var i = getControlIndex( this, element );\n\n            if ( i >= 0 ) {\n                this.controls[ i ].destroy();\n                this.controls.splice( i, 1 );\n            }\n\n            return this;\n        },\n\n        /**\n         * @function\n         * @return {OpenSeadragon.ControlDock} Chainable.\n         */\n        clearControls: function () {\n            while ( this.controls.length > 0 ) {\n                this.controls.pop().destroy();\n            }\n\n            return this;\n        },\n\n\n        /**\n         * @function\n         * @return {Boolean}\n         */\n        areControlsEnabled: function () {\n            var i;\n\n            for ( i = this.controls.length - 1; i >= 0; i-- ) {\n                if ( this.controls[ i ].isVisible() ) {\n                    return true;\n                }\n            }\n\n            return false;\n        },\n\n\n        /**\n         * @function\n         * @return {OpenSeadragon.ControlDock} Chainable.\n         */\n        setControlsEnabled: function( enabled ) {\n            var i;\n\n            for ( i = this.controls.length - 1; i >= 0; i-- ) {\n                this.controls[ i ].setVisible( enabled );\n            }\n\n            return this;\n        }\n\n    };\n\n\n    ///////////////////////////////////////////////////////////////////////////////\n    // Utility methods\n    ///////////////////////////////////////////////////////////////////////////////\n    function getControlIndex( dock, element ) {\n        var controls = dock.controls,\n            i;\n\n        for ( i = controls.length - 1; i >= 0; i-- ) {\n            if ( controls[ i ].element === element ) {\n                return i;\n            }\n        }\n\n        return -1;\n    }\n\n}( OpenSeadragon ));\n\n/*\n * OpenSeadragon - Placement\n *\n * Copyright (C) 2010-2016 OpenSeadragon contributors\n *\n * Redistribution and use in source and binary forms, with or without\n * modification, are permitted provided that the following conditions are\n * met:\n *\n * - Redistributions of source code must retain the above copyright notice,\n *   this list of conditions and the following disclaimer.\n *\n * - Redistributions in binary form must reproduce the above copyright\n *   notice, this list of conditions and the following disclaimer in the\n *   documentation and/or other materials provided with the distribution.\n *\n * - Neither the name of CodePlex Foundation nor the names of its\n *   contributors may be used to endorse or promote products derived from\n *   this software without specific prior written permission.\n *\n * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS\n * \"AS IS\" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT\n * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR\n * A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT\n * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,\n * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED\n * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR\n * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF\n * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING\n * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS\n * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.\n */\n\n(function($) {\n\n    /**\n     * An enumeration of positions to anchor an element.\n     * @member Placement\n     * @memberOf OpenSeadragon\n     * @static\n     * @readonly\n     * @property {OpenSeadragon.Placement} CENTER\n     * @property {OpenSeadragon.Placement} TOP_LEFT\n     * @property {OpenSeadragon.Placement} TOP\n     * @property {OpenSeadragon.Placement} TOP_RIGHT\n     * @property {OpenSeadragon.Placement} RIGHT\n     * @property {OpenSeadragon.Placement} BOTTOM_RIGHT\n     * @property {OpenSeadragon.Placement} BOTTOM\n     * @property {OpenSeadragon.Placement} BOTTOM_LEFT\n     * @property {OpenSeadragon.Placement} LEFT\n     */\n    $.Placement = $.freezeObject({\n        CENTER:       0,\n        TOP_LEFT:     1,\n        TOP:          2,\n        TOP_RIGHT:    3,\n        RIGHT:        4,\n        BOTTOM_RIGHT: 5,\n        BOTTOM:       6,\n        BOTTOM_LEFT:  7,\n        LEFT:         8,\n        properties: {\n            0: {\n                isLeft: false,\n                isHorizontallyCentered: true,\n                isRight: false,\n                isTop: false,\n                isVerticallyCentered: true,\n                isBottom: false\n            },\n            1: {\n                isLeft: true,\n                isHorizontallyCentered: false,\n                isRight: false,\n                isTop: true,\n                isVerticallyCentered: false,\n                isBottom: false\n            },\n            2: {\n                isLeft: false,\n                isHorizontallyCentered: true,\n                isRight: false,\n                isTop: true,\n                isVerticallyCentered: false,\n                isBottom: false\n            },\n            3: {\n                isLeft: false,\n                isHorizontallyCentered: false,\n                isRight: true,\n                isTop: true,\n                isVerticallyCentered: false,\n                isBottom: false\n            },\n            4: {\n                isLeft: false,\n                isHorizontallyCentered: false,\n                isRight: true,\n                isTop: false,\n                isVerticallyCentered: true,\n                isBottom: false\n            },\n            5: {\n                isLeft: false,\n                isHorizontallyCentered: false,\n                isRight: true,\n                isTop: false,\n                isVerticallyCentered: false,\n                isBottom: true\n            },\n            6: {\n                isLeft: false,\n                isHorizontallyCentered: true,\n                isRight: false,\n                isTop: false,\n                isVerticallyCentered: false,\n                isBottom: true\n            },\n            7: {\n                isLeft: true,\n                isHorizontallyCentered: false,\n                isRight: false,\n                isTop: false,\n                isVerticallyCentered: false,\n                isBottom: true\n            },\n            8: {\n                isLeft: true,\n                isHorizontallyCentered: false,\n                isRight: false,\n                isTop: false,\n                isVerticallyCentered: true,\n                isBottom: false\n            }\n        }\n    });\n\n}(OpenSeadragon));\n\n/*\n * OpenSeadragon - Viewer\n *\n * Copyright (C) 2009 CodePlex Foundation\n * Copyright (C) 2010-2013 OpenSeadragon contributors\n *\n * Redistribution and use in source and binary forms, with or without\n * modification, are permitted provided that the following conditions are\n * met:\n *\n * - Redistributions of source code must retain the above copyright notice,\n *   this list of conditions and the following disclaimer.\n *\n * - Redistributions in binary form must reproduce the above copyright\n *   notice, this list of conditions and the following disclaimer in the\n *   documentation and/or other materials provided with the distribution.\n *\n * - Neither the name of CodePlex Foundation nor the names of its\n *   contributors may be used to endorse or promote products derived from\n *   this software without specific prior written permission.\n *\n * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS\n * \"AS IS\" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT\n * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR\n * A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT\n * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,\n * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED\n * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR\n * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF\n * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING\n * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS\n * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.\n */\n\n(function( $ ){\n\n// dictionary from hash to private properties\nvar THIS = {};\nvar nextHash = 1;\n\n/**\n *\n * The main point of entry into creating a zoomable image on the page.<br>\n * <br>\n * We have provided an idiomatic javascript constructor which takes\n * a single object, but still support the legacy positional arguments.<br>\n * <br>\n * The options below are given in order that they appeared in the constructor\n * as arguments and we translate a positional call into an idiomatic call.<br>\n * <br>\n * To create a viewer, you can use either of this methods:<br>\n * <ul>\n * <li><code>var viewer = new OpenSeadragon.Viewer(options);</code></li>\n * <li><code>var viewer = OpenSeadragon(options);</code></li>\n * </ul>\n * @class Viewer\n * @classdesc The main OpenSeadragon viewer class.\n *\n * @memberof OpenSeadragon\n * @extends OpenSeadragon.EventSource\n * @extends OpenSeadragon.ControlDock\n * @param {OpenSeadragon.Options} options - Viewer options.\n *\n **/\n$.Viewer = function( options ) {\n\n    var args  = arguments,\n        _this = this,\n        i;\n\n\n    //backward compatibility for positional args while preferring more\n    //idiomatic javascript options object as the only argument\n    if( !$.isPlainObject( options ) ){\n        options = {\n            id:                 args[ 0 ],\n            xmlPath:            args.length > 1 ? args[ 1 ] : undefined,\n            prefixUrl:          args.length > 2 ? args[ 2 ] : undefined,\n            controls:           args.length > 3 ? args[ 3 ] : undefined,\n            overlays:           args.length > 4 ? args[ 4 ] : undefined\n        };\n    }\n\n    //options.config and the general config argument are deprecated\n    //in favor of the more direct specification of optional settings\n    //being pass directly on the options object\n    if ( options.config ){\n        $.extend( true, options, options.config );\n        delete options.config;\n    }\n\n    //Public properties\n    //Allow the options object to override global defaults\n    $.extend( true, this, {\n\n        //internal state and dom identifiers\n        id:             options.id,\n        hash:           options.hash || nextHash++,\n        /**\n         * Index for page to be shown first next time open() is called (only used in sequenceMode).\n         * @member {Number} initialPage\n         * @memberof OpenSeadragon.Viewer#\n         */\n        initialPage:    0,\n\n        //dom nodes\n        /**\n         * The parent element of this Viewer instance, passed in when the Viewer was created.\n         * @member {Element} element\n         * @memberof OpenSeadragon.Viewer#\n         */\n        element:        null,\n        /**\n         * A &lt;div&gt; element (provided by {@link OpenSeadragon.ControlDock}), the base element of this Viewer instance.<br><br>\n         * Child element of {@link OpenSeadragon.Viewer#element}.\n         * @member {Element} container\n         * @memberof OpenSeadragon.Viewer#\n         */\n        container:      null,\n        /**\n         * A &lt;div&gt; element, the element where user-input events are handled for panning and zooming.<br><br>\n         * Child element of {@link OpenSeadragon.Viewer#container},\n         * positioned on top of {@link OpenSeadragon.Viewer#keyboardCommandArea}.<br><br>\n         * The parent of {@link OpenSeadragon.Drawer#canvas} instances.\n         * @member {Element} canvas\n         * @memberof OpenSeadragon.Viewer#\n         */\n        canvas:         null,\n\n        // Overlays list. An overlay allows to add html on top of the viewer.\n        overlays:           [],\n        // Container inside the canvas where overlays are drawn.\n        overlaysContainer:  null,\n\n        //private state properties\n        previousBody:   [],\n\n        //This was originally initialized in the constructor and so could never\n        //have anything in it.  now it can because we allow it to be specified\n        //in the options and is only empty by default if not specified. Also\n        //this array was returned from get_controls which I find confusing\n        //since this object has a controls property which is treated in other\n        //functions like clearControls.  I'm removing the accessors.\n        customControls: [],\n\n        //These are originally not part options but declared as members\n        //in initialize.  It's still considered idiomatic to put them here\n        //source is here for backwards compatibility. It is not an official\n        //part of the API and should not be relied upon.\n        source:         null,\n        /**\n         * Handles rendering of tiles in the viewer. Created for each TileSource opened.\n         * @member {OpenSeadragon.Drawer} drawer\n         * @memberof OpenSeadragon.Viewer#\n         */\n        drawer:             null,\n        /**\n         * Keeps track of all of the tiled images in the scene.\n         * @member {OpenSeadragon.World} world\n         * @memberof OpenSeadragon.Viewer#\n         */\n        world:              null,\n        /**\n         * Handles coordinate-related functionality - zoom, pan, rotation, etc. Created for each TileSource opened.\n         * @member {OpenSeadragon.Viewport} viewport\n         * @memberof OpenSeadragon.Viewer#\n         */\n        viewport:       null,\n        /**\n         * @member {OpenSeadragon.Navigator} navigator\n         * @memberof OpenSeadragon.Viewer#\n         */\n        navigator:      null,\n\n        //A collection viewport is a separate viewport used to provide\n        //simultaneous rendering of sets of tiles\n        collectionViewport:     null,\n        collectionDrawer:       null,\n\n        //UI image resources\n        //TODO: rename navImages to uiImages\n        navImages:      null,\n\n        //interface button controls\n        buttons:        null,\n\n        //TODO: this is defunct so safely remove it\n        profiler:       null\n\n    }, $.DEFAULT_SETTINGS, options );\n\n    if ( typeof ( this.hash) === \"undefined\" ) {\n        throw new Error(\"A hash must be defined, either by specifying options.id or options.hash.\");\n    }\n    if ( typeof ( THIS[ this.hash ] ) !== \"undefined\" ) {\n        // We don't want to throw an error here, as the user might have discarded\n        // the previous viewer with the same hash and now want to recreate it.\n        $.console.warn(\"Hash \" + this.hash + \" has already been used.\");\n    }\n\n    //Private state properties\n    THIS[ this.hash ] = {\n        fsBoundsDelta:     new $.Point( 1, 1 ),\n        prevContainerSize: null,\n        animating:         false,\n        forceRedraw:       false,\n        mouseInside:       false,\n        group:             null,\n        // whether we should be continuously zooming\n        zooming:           false,\n        // how much we should be continuously zooming by\n        zoomFactor:        null,\n        lastZoomTime:      null,\n        fullPage:          false,\n        onfullscreenchange: null\n    };\n\n    this._sequenceIndex = 0;\n    this._firstOpen = true;\n    this._updateRequestId = null;\n    this._loadQueue = [];\n    this.currentOverlays = [];\n    this._updatePixelDensityRatioBind = null;\n\n    this._lastScrollTime = $.now(); // variable used to help normalize the scroll event speed of different devices\n\n    //Inherit some behaviors and properties\n    $.EventSource.call( this );\n\n    this.addHandler( 'open-failed', function ( event ) {\n        var msg = $.getString( \"Errors.OpenFailed\", event.eventSource, event.message);\n        _this._showMessage( msg );\n    });\n\n    $.ControlDock.call( this, options );\n\n    //Deal with tile sources\n    if (this.xmlPath) {\n        //Deprecated option.  Now it is preferred to use the tileSources option\n        this.tileSources = [ this.xmlPath ];\n    }\n\n    this.element              = this.element || document.getElementById( this.id );\n    this.canvas               = $.makeNeutralElement( \"div\" );\n\n    this.canvas.className = \"openseadragon-canvas\";\n    (function( style ){\n        style.width    = \"100%\";\n        style.height   = \"100%\";\n        style.overflow = \"hidden\";\n        style.position = \"absolute\";\n        style.top      = \"0px\";\n        style.left     = \"0px\";\n    }(this.canvas.style));\n    $.setElementTouchActionNone( this.canvas );\n    if (options.tabIndex !== \"\") {\n        this.canvas.tabIndex = (options.tabIndex === undefined ? 0 : options.tabIndex);\n    }\n\n    //the container is created through applying the ControlDock constructor above\n    this.container.className = \"openseadragon-container\";\n    (function( style ){\n        style.width     = \"100%\";\n        style.height    = \"100%\";\n        style.position  = \"relative\";\n        style.overflow  = \"hidden\";\n        style.left      = \"0px\";\n        style.top       = \"0px\";\n        style.textAlign = \"left\";  // needed to protect against\n    }( this.container.style ));\n    $.setElementTouchActionNone( this.container );\n\n    this.container.insertBefore( this.canvas, this.container.firstChild );\n    this.element.appendChild( this.container );\n\n    //Used for toggling between fullscreen and default container size\n    //TODO: these can be closure private and shared across Viewer\n    //      instances.\n    this.bodyWidth      = document.body.style.width;\n    this.bodyHeight     = document.body.style.height;\n    this.bodyOverflow   = document.body.style.overflow;\n    this.docOverflow    = document.documentElement.style.overflow;\n\n    this.innerTracker = new $.MouseTracker({\n        userData:                 'Viewer.innerTracker',\n        element:                  this.canvas,\n        startDisabled:            !this.mouseNavEnabled,\n        clickTimeThreshold:       this.clickTimeThreshold,\n        clickDistThreshold:       this.clickDistThreshold,\n        dblClickTimeThreshold:    this.dblClickTimeThreshold,\n        dblClickDistThreshold:    this.dblClickDistThreshold,\n        contextMenuHandler:       $.delegate( this, onCanvasContextMenu ),\n        keyDownHandler:           $.delegate( this, onCanvasKeyDown ),\n        keyHandler:               $.delegate( this, onCanvasKeyPress ),\n        clickHandler:             $.delegate( this, onCanvasClick ),\n        dblClickHandler:          $.delegate( this, onCanvasDblClick ),\n        dragHandler:              $.delegate( this, onCanvasDrag ),\n        dragEndHandler:           $.delegate( this, onCanvasDragEnd ),\n        enterHandler:             $.delegate( this, onCanvasEnter ),\n        leaveHandler:             $.delegate( this, onCanvasLeave ),\n        pressHandler:             $.delegate( this, onCanvasPress ),\n        releaseHandler:           $.delegate( this, onCanvasRelease ),\n        nonPrimaryPressHandler:   $.delegate( this, onCanvasNonPrimaryPress ),\n        nonPrimaryReleaseHandler: $.delegate( this, onCanvasNonPrimaryRelease ),\n        scrollHandler:            $.delegate( this, onCanvasScroll ),\n        pinchHandler:             $.delegate( this, onCanvasPinch )\n    });\n\n    this.outerTracker = new $.MouseTracker({\n        userData:              'Viewer.outerTracker',\n        element:               this.container,\n        startDisabled:         !this.mouseNavEnabled,\n        clickTimeThreshold:    this.clickTimeThreshold,\n        clickDistThreshold:    this.clickDistThreshold,\n        dblClickTimeThreshold: this.dblClickTimeThreshold,\n        dblClickDistThreshold: this.dblClickDistThreshold,\n        enterHandler:          $.delegate( this, onContainerEnter ),\n        leaveHandler:          $.delegate( this, onContainerLeave )\n    });\n\n    if( this.toolbar ){\n        this.toolbar = new $.ControlDock({ element: this.toolbar });\n    }\n\n    this.bindStandardControls();\n\n    THIS[ this.hash ].prevContainerSize = _getSafeElemSize( this.container );\n\n    // Create the world\n    this.world = new $.World({\n        viewer: this\n    });\n\n    this.world.addHandler('add-item', function(event) {\n        // For backwards compatibility, we maintain the source property\n        _this.source = _this.world.getItemAt(0).source;\n\n        THIS[ _this.hash ].forceRedraw = true;\n\n        if (!_this._updateRequestId) {\n            _this._updateRequestId = scheduleUpdate( _this, updateMulti );\n        }\n    });\n\n    this.world.addHandler('remove-item', function(event) {\n        // For backwards compatibility, we maintain the source property\n        if (_this.world.getItemCount()) {\n            _this.source = _this.world.getItemAt(0).source;\n        } else {\n            _this.source = null;\n        }\n\n        THIS[ _this.hash ].forceRedraw = true;\n    });\n\n    this.world.addHandler('metrics-change', function(event) {\n        if (_this.viewport) {\n            _this.viewport._setContentBounds(_this.world.getHomeBounds(), _this.world.getContentFactor());\n        }\n    });\n\n    this.world.addHandler('item-index-change', function(event) {\n        // For backwards compatibility, we maintain the source property\n        _this.source = _this.world.getItemAt(0).source;\n    });\n\n    // Create the viewport\n    this.viewport = new $.Viewport({\n        containerSize:              THIS[ this.hash ].prevContainerSize,\n        springStiffness:            this.springStiffness,\n        animationTime:              this.animationTime,\n        minZoomImageRatio:          this.minZoomImageRatio,\n        maxZoomPixelRatio:          this.maxZoomPixelRatio,\n        visibilityRatio:            this.visibilityRatio,\n        wrapHorizontal:             this.wrapHorizontal,\n        wrapVertical:               this.wrapVertical,\n        defaultZoomLevel:           this.defaultZoomLevel,\n        minZoomLevel:               this.minZoomLevel,\n        maxZoomLevel:               this.maxZoomLevel,\n        viewer:                     this,\n        degrees:                    this.degrees,\n        flipped:                    this.flipped,\n        navigatorRotate:            this.navigatorRotate,\n        homeFillsViewer:            this.homeFillsViewer,\n        margins:                    this.viewportMargins,\n        silenceMultiImageWarnings:  this.silenceMultiImageWarnings\n    });\n\n    this.viewport._setContentBounds(this.world.getHomeBounds(), this.world.getContentFactor());\n\n    // Create the image loader\n    this.imageLoader = new $.ImageLoader({\n        jobLimit: this.imageLoaderLimit,\n        timeout: options.timeout\n    });\n\n    // Create the tile cache\n    this.tileCache = new $.TileCache({\n        maxImageCacheCount: this.maxImageCacheCount\n    });\n\n    // Create the drawer\n    this.drawer = new $.Drawer({\n        viewer:             this,\n        viewport:           this.viewport,\n        element:            this.canvas,\n        debugGridColor:     this.debugGridColor\n    });\n\n    // Overlay container\n    this.overlaysContainer    = $.makeNeutralElement( \"div\" );\n    this.canvas.appendChild( this.overlaysContainer );\n\n    // Now that we have a drawer, see if it supports rotate. If not we need to remove the rotate buttons\n    if (!this.drawer.canRotate()) {\n        // Disable/remove the rotate left/right buttons since they aren't supported\n        if (this.rotateLeft) {\n            i = this.buttonGroup.buttons.indexOf(this.rotateLeft);\n            this.buttonGroup.buttons.splice(i, 1);\n            this.buttonGroup.element.removeChild(this.rotateLeft.element);\n        }\n        if (this.rotateRight) {\n            i = this.buttonGroup.buttons.indexOf(this.rotateRight);\n            this.buttonGroup.buttons.splice(i, 1);\n            this.buttonGroup.element.removeChild(this.rotateRight.element);\n        }\n    }\n\n    this._addUpdatePixelDensityRatioEvent();\n\n    //Instantiate a navigator if configured\n    if ( this.showNavigator){\n        this.navigator = new $.Navigator({\n            id:                this.navigatorId,\n            position:          this.navigatorPosition,\n            sizeRatio:         this.navigatorSizeRatio,\n            maintainSizeRatio: this.navigatorMaintainSizeRatio,\n            top:               this.navigatorTop,\n            left:              this.navigatorLeft,\n            width:             this.navigatorWidth,\n            height:            this.navigatorHeight,\n            autoResize:        this.navigatorAutoResize,\n            autoFade:          this.navigatorAutoFade,\n            prefixUrl:         this.prefixUrl,\n            viewer:            this,\n            navigatorRotate:   this.navigatorRotate,\n            background:        this.navigatorBackground,\n            opacity:           this.navigatorOpacity,\n            borderColor:       this.navigatorBorderColor,\n            displayRegionColor: this.navigatorDisplayRegionColor,\n            crossOriginPolicy: this.crossOriginPolicy\n        });\n    }\n\n    // Sequence mode\n    if (this.sequenceMode) {\n        this.bindSequenceControls();\n    }\n\n    // Open initial tilesources\n    if (this.tileSources) {\n        this.open( this.tileSources );\n    }\n\n    // Add custom controls\n    for ( i = 0; i < this.customControls.length; i++ ) {\n        this.addControl(\n            this.customControls[ i ].id,\n            {anchor: this.customControls[ i ].anchor}\n        );\n    }\n\n    // Initial fade out\n    $.requestAnimationFrame( function(){\n        beginControlsAutoHide( _this );\n    } );\n\n    // Initial canvas options\n    if ( this.imageSmoothingEnabled !== undefined && !this.imageSmoothingEnabled){\n        this.drawer.setImageSmoothingEnabled(this.imageSmoothingEnabled);\n    }\n\n    // Register the viewer\n    $._viewers.set(this.element, this);\n};\n\n$.extend( $.Viewer.prototype, $.EventSource.prototype, $.ControlDock.prototype, /** @lends OpenSeadragon.Viewer.prototype */{\n\n\n    /**\n     * @function\n     * @return {Boolean}\n     */\n    isOpen: function () {\n        return !!this.world.getItemCount();\n    },\n\n    // deprecated\n    openDzi: function ( dzi ) {\n        $.console.error( \"[Viewer.openDzi] this function is deprecated; use Viewer.open() instead.\" );\n        return this.open( dzi );\n    },\n\n    // deprecated\n    openTileSource: function ( tileSource ) {\n        $.console.error( \"[Viewer.openTileSource] this function is deprecated; use Viewer.open() instead.\" );\n        return this.open( tileSource );\n    },\n\n    //deprecated\n    get buttons () {\n        $.console.warn('Viewer.buttons is deprecated; Please use Viewer.buttonGroup');\n        return this.buttonGroup;\n    },\n\n    /**\n     * Open tiled images into the viewer, closing any others.\n     * To get the TiledImage instance created by open, add an event listener for\n     * {@link OpenSeadragon.Viewer.html#.event:open}, which when fired can be used to get access\n     * to the instance, i.e., viewer.world.getItemAt(0).\n     * @function\n     * @param {Array|String|Object|Function} tileSources - This can be a TiledImage\n     * specifier, a TileSource specifier, or an array of either. A TiledImage specifier\n     * is the same as the options parameter for {@link OpenSeadragon.Viewer#addTiledImage},\n     * except for the index property; images are added in sequence.\n     * A TileSource specifier is anything you could pass as the tileSource property\n     * of the options parameter for {@link OpenSeadragon.Viewer#addTiledImage}.\n     * @param {Number} initialPage - If sequenceMode is true, display this page initially\n     * for the given tileSources. If specified, will overwrite the Viewer's existing initialPage property.\n     * @return {OpenSeadragon.Viewer} Chainable.\n     * @fires OpenSeadragon.Viewer.event:open\n     * @fires OpenSeadragon.Viewer.event:open-failed\n     */\n    open: function (tileSources, initialPage) {\n        var _this = this;\n\n        this.close();\n\n        if (!tileSources) {\n            return this;\n        }\n\n        if (this.sequenceMode && $.isArray(tileSources)) {\n            if (this.referenceStrip) {\n                this.referenceStrip.destroy();\n                this.referenceStrip = null;\n            }\n\n            if (typeof initialPage !== 'undefined' && !isNaN(initialPage)) {\n              this.initialPage = initialPage;\n            }\n\n            this.tileSources = tileSources;\n            this._sequenceIndex = Math.max(0, Math.min(this.tileSources.length - 1, this.initialPage));\n            if (this.tileSources.length) {\n                this.open(this.tileSources[this._sequenceIndex]);\n\n                if ( this.showReferenceStrip ){\n                    this.addReferenceStrip();\n                }\n            }\n\n            this._updateSequenceButtons( this._sequenceIndex );\n            return this;\n        }\n\n        if (!$.isArray(tileSources)) {\n            tileSources = [tileSources];\n        }\n\n        if (!tileSources.length) {\n            return this;\n        }\n\n        this._opening = true;\n\n        var expected = tileSources.length;\n        var successes = 0;\n        var failures = 0;\n        var failEvent;\n\n        var checkCompletion = function() {\n            if (successes + failures === expected) {\n                if (successes) {\n                    if (_this._firstOpen || !_this.preserveViewport) {\n                        _this.viewport.goHome( true );\n                        _this.viewport.update();\n                    }\n\n                    _this._firstOpen = false;\n\n                    var source = tileSources[0];\n                    if (source.tileSource) {\n                        source = source.tileSource;\n                    }\n\n                    // Global overlays\n                    if( _this.overlays && !_this.preserveOverlays ){\n                        for ( var i = 0; i < _this.overlays.length; i++ ) {\n                            _this.currentOverlays[ i ] = getOverlayObject( _this, _this.overlays[ i ] );\n                        }\n                    }\n\n                    _this._drawOverlays();\n                    _this._opening = false;\n\n                    /**\n                     * Raised when the viewer has opened and loaded one or more TileSources.\n                     *\n                     * @event open\n                     * @memberof OpenSeadragon.Viewer\n                     * @type {object}\n                     * @property {OpenSeadragon.Viewer} eventSource - A reference to the Viewer which raised the event.\n                     * @property {OpenSeadragon.TileSource} source - The tile source that was opened.\n                     * @property {?Object} userData - Arbitrary subscriber-defined object.\n                     */\n                    // TODO: what if there are multiple sources?\n                    _this.raiseEvent( 'open', { source: source } );\n                } else {\n                    _this._opening = false;\n\n                    /**\n                     * Raised when an error occurs loading a TileSource.\n                     *\n                     * @event open-failed\n                     * @memberof OpenSeadragon.Viewer\n                     * @type {object}\n                     * @property {OpenSeadragon.Viewer} eventSource - A reference to the Viewer which raised the event.\n                     * @property {String} message - Information about what failed.\n                     * @property {String} source - The tile source that failed.\n                     * @property {?Object} userData - Arbitrary subscriber-defined object.\n                     */\n                    _this.raiseEvent( 'open-failed', failEvent );\n                }\n            }\n        };\n\n        var doOne = function(options) {\n            if (!$.isPlainObject(options) || !options.tileSource) {\n                options = {\n                    tileSource: options\n                };\n            }\n\n            if (options.index !== undefined) {\n                $.console.error('[Viewer.open] setting indexes here is not supported; use addTiledImage instead');\n                delete options.index;\n            }\n\n            if (options.collectionImmediately === undefined) {\n                options.collectionImmediately = true;\n            }\n\n            var originalSuccess = options.success;\n            options.success = function(event) {\n                successes++;\n\n                // TODO: now that options has other things besides tileSource, the overlays\n                // should probably be at the options level, not the tileSource level.\n                if (options.tileSource.overlays) {\n                    for (var i = 0; i < options.tileSource.overlays.length; i++) {\n                        _this.addOverlay(options.tileSource.overlays[i]);\n                    }\n                }\n\n                if (originalSuccess) {\n                    originalSuccess(event);\n                }\n\n                checkCompletion();\n            };\n\n            var originalError = options.error;\n            options.error = function(event) {\n                failures++;\n\n                if (!failEvent) {\n                    failEvent = event;\n                }\n\n                if (originalError) {\n                    originalError(event);\n                }\n\n                checkCompletion();\n            };\n\n            _this.addTiledImage(options);\n        };\n\n        // TileSources\n        for (var i = 0; i < tileSources.length; i++) {\n            doOne(tileSources[i]);\n        }\n\n        return this;\n    },\n\n\n    /**\n     * @function\n     * @return {OpenSeadragon.Viewer} Chainable.\n     * @fires OpenSeadragon.Viewer.event:close\n     */\n    close: function ( ) {\n        if ( !THIS[ this.hash ] ) {\n            //this viewer has already been destroyed: returning immediately\n            return this;\n        }\n\n        this._opening = false;\n\n        if ( this.navigator ) {\n            this.navigator.close();\n        }\n\n        if (!this.preserveOverlays) {\n            this.clearOverlays();\n            this.overlaysContainer.innerHTML = \"\";\n        }\n\n        THIS[ this.hash ].animating = false;\n\n        this.world.removeAll();\n        this.imageLoader.clear();\n\n        /**\n         * Raised when the viewer is closed (see {@link OpenSeadragon.Viewer#close}).\n         *\n         * @event close\n         * @memberof OpenSeadragon.Viewer\n         * @type {object}\n         * @property {OpenSeadragon.Viewer} eventSource - A reference to the Viewer which raised the event.\n         * @property {?Object} userData - Arbitrary subscriber-defined object.\n         */\n        this.raiseEvent( 'close' );\n\n        return this;\n    },\n\n\n    /**\n     * Function to destroy the viewer and clean up everything created by OpenSeadragon.\n     *\n     * Example:\n     * var viewer = OpenSeadragon({\n     *   [...]\n     * });\n     *\n     * //when you are done with the viewer:\n     * viewer.destroy();\n     * viewer = null; //important\n     *\n     * @function\n     */\n    destroy: function( ) {\n        if ( !THIS[ this.hash ] ) {\n            //this viewer has already been destroyed: returning immediately\n            return;\n        }\n\n        this._removeUpdatePixelDensityRatioEvent();\n\n        this.close();\n\n        this.clearOverlays();\n        this.overlaysContainer.innerHTML = \"\";\n\n        //TODO: implement this...\n        //this.unbindSequenceControls()\n        //this.unbindStandardControls()\n\n        if (this.referenceStrip) {\n            this.referenceStrip.destroy();\n            this.referenceStrip = null;\n        }\n\n        if ( this._updateRequestId !== null ) {\n            $.cancelAnimationFrame( this._updateRequestId );\n            this._updateRequestId = null;\n        }\n\n        if ( this.drawer ) {\n            this.drawer.destroy();\n        }\n\n        if ( this.navigator ) {\n            this.navigator.destroy();\n            THIS[ this.navigator.hash ] = null;\n            delete THIS[ this.navigator.hash ];\n            this.navigator = null;\n        }\n\n        this.removeAllHandlers();\n\n        if (this.buttonGroup) {\n            this.buttonGroup.destroy();\n        } else if (this.customButtons) {\n            while (this.customButtons.length) {\n                this.customButtons.pop().destroy();\n            }\n        }\n\n        if (this.paging) {\n            this.paging.destroy();\n        }\n\n        // Go through top element (passed to us) and remove all children\n        // Use removeChild to make sure it handles SVG or any non-html\n        // also it performs better - http://jsperf.com/innerhtml-vs-removechild/15\n        if (this.element){\n            while (this.element.firstChild) {\n                this.element.removeChild(this.element.firstChild);\n            }\n        }\n\n        this.container.onsubmit = null;\n        this.clearControls();\n\n        // destroy the mouse trackers\n        if (this.innerTracker){\n            this.innerTracker.destroy();\n        }\n        if (this.outerTracker){\n            this.outerTracker.destroy();\n        }\n\n        THIS[ this.hash ] = null;\n        delete THIS[ this.hash ];\n\n        // clear all our references to dom objects\n        this.canvas = null;\n        this.container = null;\n\n        // Unregister the viewer\n        $._viewers.delete(this.element);\n\n        // clear our reference to the main element - they will need to pass it in again, creating a new viewer\n        this.element = null;\n    },\n\n    /**\n     * @function\n     * @return {Boolean}\n     */\n    isMouseNavEnabled: function () {\n        return this.innerTracker.isTracking();\n    },\n\n    /**\n     * @function\n     * @param {Boolean} enabled - true to enable, false to disable\n     * @return {OpenSeadragon.Viewer} Chainable.\n     * @fires OpenSeadragon.Viewer.event:mouse-enabled\n     */\n    setMouseNavEnabled: function( enabled ){\n        this.innerTracker.setTracking( enabled );\n        this.outerTracker.setTracking( enabled );\n        /**\n         * Raised when mouse/touch navigation is enabled or disabled (see {@link OpenSeadragon.Viewer#setMouseNavEnabled}).\n         *\n         * @event mouse-enabled\n         * @memberof OpenSeadragon.Viewer\n         * @type {object}\n         * @property {OpenSeadragon.Viewer} eventSource - A reference to the Viewer which raised the event.\n         * @property {Boolean} enabled\n         * @property {?Object} userData - Arbitrary subscriber-defined object.\n         */\n        this.raiseEvent( 'mouse-enabled', { enabled: enabled } );\n        return this;\n    },\n\n\n    /**\n     * @function\n     * @return {Boolean}\n     */\n    areControlsEnabled: function () {\n        var enabled = this.controls.length,\n            i;\n        for( i = 0; i < this.controls.length; i++ ){\n            enabled = enabled && this.controls[ i ].isVisible();\n        }\n        return enabled;\n    },\n\n\n    /**\n     * Shows or hides the controls (e.g. the default navigation buttons).\n     *\n     * @function\n     * @param {Boolean} true to show, false to hide.\n     * @return {OpenSeadragon.Viewer} Chainable.\n     * @fires OpenSeadragon.Viewer.event:controls-enabled\n     */\n    setControlsEnabled: function( enabled ) {\n        if( enabled ){\n            abortControlsAutoHide( this );\n        } else {\n            beginControlsAutoHide( this );\n        }\n        /**\n         * Raised when the navigation controls are shown or hidden (see {@link OpenSeadragon.Viewer#setControlsEnabled}).\n         *\n         * @event controls-enabled\n         * @memberof OpenSeadragon.Viewer\n         * @type {object}\n         * @property {OpenSeadragon.Viewer} eventSource - A reference to the Viewer which raised the event.\n         * @property {Boolean} enabled\n         * @property {?Object} userData - Arbitrary subscriber-defined object.\n         */\n        this.raiseEvent( 'controls-enabled', { enabled: enabled } );\n        return this;\n    },\n\n    /**\n     * Turns debugging mode on or off for this viewer.\n     *\n     * @function\n     * @param {Boolean} true to turn debug on, false to turn debug off.\n     */\n    setDebugMode: function(debugMode){\n\n        for (var i = 0; i < this.world.getItemCount(); i++) {\n            this.world.getItemAt(i).debugMode = debugMode;\n        }\n\n        this.debugMode = debugMode;\n        this.forceRedraw();\n    },\n\n    /**\n     * @function\n     * @return {Boolean}\n     */\n    isFullPage: function () {\n        return THIS[ this.hash ].fullPage;\n    },\n\n\n    /**\n     * Toggle full page mode.\n     * @function\n     * @param {Boolean} fullPage\n     *      If true, enter full page mode.  If false, exit full page mode.\n     * @return {OpenSeadragon.Viewer} Chainable.\n     * @fires OpenSeadragon.Viewer.event:pre-full-page\n     * @fires OpenSeadragon.Viewer.event:full-page\n     */\n    setFullPage: function( fullPage ) {\n\n        var body = document.body,\n            bodyStyle = body.style,\n            docStyle = document.documentElement.style,\n            _this = this,\n            nodes,\n            i;\n\n        //don't bother modifying the DOM if we are already in full page mode.\n        if ( fullPage === this.isFullPage() ) {\n            return this;\n        }\n\n        var fullPageEventArgs = {\n            fullPage: fullPage,\n            preventDefaultAction: false\n        };\n        /**\n         * Raised when the viewer is about to change to/from full-page mode (see {@link OpenSeadragon.Viewer#setFullPage}).\n         *\n         * @event pre-full-page\n         * @memberof OpenSeadragon.Viewer\n         * @type {object}\n         * @property {OpenSeadragon.Viewer} eventSource - A reference to the Viewer which raised the event.\n         * @property {Boolean} fullPage - True if entering full-page mode, false if exiting full-page mode.\n         * @property {Boolean} preventDefaultAction - Set to true to prevent full-page mode change. Default: false.\n         * @property {?Object} userData - Arbitrary subscriber-defined object.\n         */\n        this.raiseEvent( 'pre-full-page', fullPageEventArgs );\n        if ( fullPageEventArgs.preventDefaultAction ) {\n            return this;\n        }\n\n        if ( fullPage ) {\n\n            this.elementSize = $.getElementSize( this.element );\n            this.pageScroll = $.getPageScroll();\n\n            this.elementMargin = this.element.style.margin;\n            this.element.style.margin = \"0\";\n            this.elementPadding = this.element.style.padding;\n            this.element.style.padding = \"0\";\n\n            this.bodyMargin = bodyStyle.margin;\n            this.docMargin = docStyle.margin;\n            bodyStyle.margin = \"0\";\n            docStyle.margin = \"0\";\n\n            this.bodyPadding = bodyStyle.padding;\n            this.docPadding = docStyle.padding;\n            bodyStyle.padding = \"0\";\n            docStyle.padding = \"0\";\n\n            this.bodyWidth = bodyStyle.width;\n            this.docWidth = docStyle.width;\n            bodyStyle.width = \"100%\";\n            docStyle.width = \"100%\";\n\n            this.bodyHeight = bodyStyle.height;\n            this.docHeight = docStyle.height;\n            bodyStyle.height = \"100%\";\n            docStyle.height = \"100%\";\n\n            this.bodyDisplay = bodyStyle.display;\n            bodyStyle.display = \"block\";\n\n            //when entering full screen on the ipad it wasn't sufficient to leave\n            //the body intact as only only the top half of the screen would\n            //respond to touch events on the canvas, while the bottom half treated\n            //them as touch events on the document body.  Thus we remove and store\n            //the bodies elements and replace them when we leave full screen.\n            this.previousBody = [];\n            THIS[ this.hash ].prevElementParent = this.element.parentNode;\n            THIS[ this.hash ].prevNextSibling = this.element.nextSibling;\n            THIS[ this.hash ].prevElementWidth = this.element.style.width;\n            THIS[ this.hash ].prevElementHeight = this.element.style.height;\n            nodes = body.childNodes.length;\n            for ( i = 0; i < nodes; i++ ) {\n                this.previousBody.push( body.childNodes[ 0 ] );\n                body.removeChild( body.childNodes[ 0 ] );\n            }\n\n            //If we've got a toolbar, we need to enable the user to use css to\n            //preserve it in fullpage mode\n            if ( this.toolbar && this.toolbar.element ) {\n                //save a reference to the parent so we can put it back\n                //in the long run we need a better strategy\n                this.toolbar.parentNode = this.toolbar.element.parentNode;\n                this.toolbar.nextSibling = this.toolbar.element.nextSibling;\n                body.appendChild( this.toolbar.element );\n\n                //Make sure the user has some ability to style the toolbar based\n                //on the mode\n                $.addClass( this.toolbar.element, 'fullpage' );\n            }\n\n            $.addClass( this.element, 'fullpage' );\n            body.appendChild( this.element );\n\n            this.element.style.height = '100vh';\n            this.element.style.width = '100vw';\n\n            if ( this.toolbar && this.toolbar.element ) {\n                this.element.style.height = (\n                    $.getElementSize( this.element ).y - $.getElementSize( this.toolbar.element ).y\n                ) + 'px';\n            }\n\n            THIS[ this.hash ].fullPage = true;\n\n            // mouse will be inside container now\n            $.delegate( this, onContainerEnter )( {} );\n\n        } else {\n\n            this.element.style.margin = this.elementMargin;\n            this.element.style.padding = this.elementPadding;\n\n            bodyStyle.margin = this.bodyMargin;\n            docStyle.margin = this.docMargin;\n\n            bodyStyle.padding = this.bodyPadding;\n            docStyle.padding = this.docPadding;\n\n            bodyStyle.width = this.bodyWidth;\n            docStyle.width = this.docWidth;\n\n            bodyStyle.height = this.bodyHeight;\n            docStyle.height = this.docHeight;\n\n            bodyStyle.display = this.bodyDisplay;\n\n            body.removeChild( this.element );\n            nodes = this.previousBody.length;\n            for ( i = 0; i < nodes; i++ ) {\n                body.appendChild( this.previousBody.shift() );\n            }\n\n            $.removeClass( this.element, 'fullpage' );\n            THIS[ this.hash ].prevElementParent.insertBefore(\n                this.element,\n                THIS[ this.hash ].prevNextSibling\n            );\n\n            //If we've got a toolbar, we need to enable the user to use css to\n            //reset it to its original state\n            if ( this.toolbar && this.toolbar.element ) {\n                body.removeChild( this.toolbar.element );\n\n                //Make sure the user has some ability to style the toolbar based\n                //on the mode\n                $.removeClass( this.toolbar.element, 'fullpage' );\n\n                this.toolbar.parentNode.insertBefore(\n                    this.toolbar.element,\n                    this.toolbar.nextSibling\n                );\n                delete this.toolbar.parentNode;\n                delete this.toolbar.nextSibling;\n            }\n\n            this.element.style.width = THIS[ this.hash ].prevElementWidth;\n            this.element.style.height = THIS[ this.hash ].prevElementHeight;\n\n            // After exiting fullPage or fullScreen, it can take some time\n            // before the browser can actually set the scroll.\n            var restoreScrollCounter = 0;\n            var restoreScroll = function() {\n                $.setPageScroll( _this.pageScroll );\n                var pageScroll = $.getPageScroll();\n                restoreScrollCounter++;\n                if (restoreScrollCounter < 10 &&\n                    (pageScroll.x !== _this.pageScroll.x ||\n                    pageScroll.y !== _this.pageScroll.y)) {\n                    $.requestAnimationFrame( restoreScroll );\n                }\n            };\n            $.requestAnimationFrame( restoreScroll );\n\n            THIS[ this.hash ].fullPage = false;\n\n            // mouse will likely be outside now\n            $.delegate( this, onContainerLeave )( { } );\n\n        }\n\n        if ( this.navigator && this.viewport ) {\n            this.navigator.update( this.viewport );\n        }\n\n        /**\n         * Raised when the viewer has changed to/from full-page mode (see {@link OpenSeadragon.Viewer#setFullPage}).\n         *\n         * @event full-page\n         * @memberof OpenSeadragon.Viewer\n         * @type {object}\n         * @property {OpenSeadragon.Viewer} eventSource - A reference to the Viewer which raised the event.\n         * @property {Boolean} fullPage - True if changed to full-page mode, false if exited full-page mode.\n         * @property {?Object} userData - Arbitrary subscriber-defined object.\n         */\n        this.raiseEvent( 'full-page', { fullPage: fullPage } );\n\n        return this;\n    },\n\n    /**\n     * Toggle full screen mode if supported. Toggle full page mode otherwise.\n     * @function\n     * @param {Boolean} fullScreen\n     *      If true, enter full screen mode.  If false, exit full screen mode.\n     * @return {OpenSeadragon.Viewer} Chainable.\n     * @fires OpenSeadragon.Viewer.event:pre-full-screen\n     * @fires OpenSeadragon.Viewer.event:full-screen\n     */\n    setFullScreen: function( fullScreen ) {\n        var _this = this;\n\n        if ( !$.supportsFullScreen ) {\n            return this.setFullPage( fullScreen );\n        }\n\n        if ( $.isFullScreen() === fullScreen ) {\n            return this;\n        }\n\n        var fullScreeEventArgs = {\n            fullScreen: fullScreen,\n            preventDefaultAction: false\n        };\n        /**\n         * Raised when the viewer is about to change to/from full-screen mode (see {@link OpenSeadragon.Viewer#setFullScreen}).\n         * Note: the pre-full-screen event is not raised when the user is exiting\n         * full-screen mode by pressing the Esc key. In that case, consider using\n         * the full-screen, pre-full-page or full-page events.\n         *\n         * @event pre-full-screen\n         * @memberof OpenSeadragon.Viewer\n         * @type {object}\n         * @property {OpenSeadragon.Viewer} eventSource - A reference to the Viewer which raised the event.\n         * @property {Boolean} fullScreen - True if entering full-screen mode, false if exiting full-screen mode.\n         * @property {Boolean} preventDefaultAction - Set to true to prevent full-screen mode change. Default: false.\n         * @property {?Object} userData - Arbitrary subscriber-defined object.\n         */\n        this.raiseEvent( 'pre-full-screen', fullScreeEventArgs );\n        if ( fullScreeEventArgs.preventDefaultAction ) {\n            return this;\n        }\n\n        if ( fullScreen ) {\n\n            this.setFullPage( true );\n            // If the full page mode is not actually entered, we need to prevent\n            // the full screen mode.\n            if ( !this.isFullPage() ) {\n                return this;\n            }\n\n            this.fullPageStyleWidth = this.element.style.width;\n            this.fullPageStyleHeight = this.element.style.height;\n            this.element.style.width = '100%';\n            this.element.style.height = '100%';\n\n            var onFullScreenChange = function() {\n                var isFullScreen = $.isFullScreen();\n                if ( !isFullScreen ) {\n                    $.removeEvent( document, $.fullScreenEventName, onFullScreenChange );\n                    $.removeEvent( document, $.fullScreenErrorEventName, onFullScreenChange );\n\n                    _this.setFullPage( false );\n                    if ( _this.isFullPage() ) {\n                        _this.element.style.width = _this.fullPageStyleWidth;\n                        _this.element.style.height = _this.fullPageStyleHeight;\n                    }\n                }\n                if ( _this.navigator && _this.viewport ) {\n                    //09/08/2018 - Fabroh : Fix issue #1504 : Ensure to get the navigator updated on fullscreen out with custom location with a timeout\n                    setTimeout(function(){\n                        _this.navigator.update( _this.viewport );\n                    });\n                }\n                /**\n                 * Raised when the viewer has changed to/from full-screen mode (see {@link OpenSeadragon.Viewer#setFullScreen}).\n                 *\n                 * @event full-screen\n                 * @memberof OpenSeadragon.Viewer\n                 * @type {object}\n                 * @property {OpenSeadragon.Viewer} eventSource - A reference to the Viewer which raised the event.\n                 * @property {Boolean} fullScreen - True if changed to full-screen mode, false if exited full-screen mode.\n                 * @property {?Object} userData - Arbitrary subscriber-defined object.\n                 */\n                _this.raiseEvent( 'full-screen', { fullScreen: isFullScreen } );\n            };\n            $.addEvent( document, $.fullScreenEventName, onFullScreenChange );\n            $.addEvent( document, $.fullScreenErrorEventName, onFullScreenChange );\n\n            $.requestFullScreen( document.body );\n\n        } else {\n            $.exitFullScreen();\n        }\n        return this;\n    },\n\n    /**\n     * @function\n     * @return {Boolean}\n     */\n    isVisible: function () {\n        return this.container.style.visibility !== \"hidden\";\n    },\n\n\n    //\n    /**\n     * @function\n     * @returns {Boolean} returns true if the viewer is in fullscreen\n     */\n     isFullScreen: function () {\n        return $.isFullScreen() && this.isFullPage();\n    },\n\n    /**\n     * @function\n     * @param {Boolean} visible\n     * @return {OpenSeadragon.Viewer} Chainable.\n     * @fires OpenSeadragon.Viewer.event:visible\n     */\n    setVisible: function( visible ){\n        this.container.style.visibility = visible ? \"\" : \"hidden\";\n        /**\n         * Raised when the viewer is shown or hidden (see {@link OpenSeadragon.Viewer#setVisible}).\n         *\n         * @event visible\n         * @memberof OpenSeadragon.Viewer\n         * @type {object}\n         * @property {OpenSeadragon.Viewer} eventSource - A reference to the Viewer which raised the event.\n         * @property {Boolean} visible\n         * @property {?Object} userData - Arbitrary subscriber-defined object.\n         */\n        this.raiseEvent( 'visible', { visible: visible } );\n        return this;\n    },\n\n    /**\n     * Add a tiled image to the viewer.\n     * options.tileSource can be anything that {@link OpenSeadragon.Viewer#open}\n     *  supports except arrays of images.\n     * Note that you can specify options.width or options.height, but not both.\n     * The other dimension will be calculated according to the item's aspect ratio.\n     * If collectionMode is on (see {@link OpenSeadragon.Options}), the new image is\n     * automatically arranged with the others.\n     * @function\n     * @param {Object} options\n     * @param {String|Object|Function} options.tileSource - The TileSource specifier.\n     * A String implies a url used to determine the tileSource implementation\n     *      based on the file extension of url. JSONP is implied by *.js,\n     *      otherwise the url is retrieved as text and the resulting text is\n     *      introspected to determine if its json, xml, or text and parsed.\n     * An Object implies an inline configuration which has a single\n     *      property sufficient for being able to determine tileSource\n     *      implementation. If the object has a property which is a function\n     *      named 'getTileUrl', it is treated as a custom TileSource.\n     * @param {Number} [options.index] The index of the item. Added on top of\n     * all other items if not specified.\n     * @param {Boolean} [options.replace=false] If true, the item at options.index will be\n     * removed and the new item is added in its place. options.tileSource will be\n     * interpreted and fetched if necessary before the old item is removed to avoid leaving\n     * a gap in the world.\n     * @param {Number} [options.x=0] The X position for the image in viewport coordinates.\n     * @param {Number} [options.y=0] The Y position for the image in viewport coordinates.\n     * @param {Number} [options.width=1] The width for the image in viewport coordinates.\n     * @param {Number} [options.height] The height for the image in viewport coordinates.\n     * @param {OpenSeadragon.Rect} [options.fitBounds] The bounds in viewport coordinates\n     * to fit the image into. If specified, x, y, width and height get ignored.\n     * @param {OpenSeadragon.Placement} [options.fitBoundsPlacement=OpenSeadragon.Placement.CENTER]\n     * How to anchor the image in the bounds if options.fitBounds is set.\n     * @param {OpenSeadragon.Rect} [options.clip] - An area, in image pixels, to clip to\n     * (portions of the image outside of this area will not be visible). Only works on\n     * browsers that support the HTML5 canvas.\n     * @param {Number} [options.opacity=1] Proportional opacity of the tiled images (1=opaque, 0=hidden)\n     * @param {Boolean} [options.preload=false]  Default switch for loading hidden images (true loads, false blocks)\n     * @param {Number} [options.degrees=0] Initial rotation of the tiled image around\n     * its top left corner in degrees.\n     * @param {Boolean} [options.flipped=false] Whether to horizontally flip the image.\n     * @param {String} [options.compositeOperation] How the image is composited onto other images.\n     * @param {String} [options.crossOriginPolicy] The crossOriginPolicy for this specific image,\n     * overriding viewer.crossOriginPolicy.\n     * @param {Boolean} [options.ajaxWithCredentials] Whether to set withCredentials on tile AJAX\n     * @param {Boolean} [options.loadTilesWithAjax]\n     *      Whether to load tile data using AJAX requests.\n     *      Defaults to the setting in {@link OpenSeadragon.Options}.\n     * @param {Object} [options.ajaxHeaders]\n     *      A set of headers to include when making tile AJAX requests.\n     *      Note that these headers will be merged over any headers specified in {@link OpenSeadragon.Options}.\n     *      Specifying a falsy value for a header will clear its existing value set at the Viewer level (if any).\n     * requests.\n     * @param {Function} [options.success] A function that gets called when the image is\n     * successfully added. It's passed the event object which contains a single property:\n     * \"item\", which is the resulting instance of TiledImage.\n     * @param {Function} [options.error] A function that gets called if the image is\n     * unable to be added. It's passed the error event object, which contains \"message\"\n     * and \"source\" properties.\n     * @param {Boolean} [options.collectionImmediately=false] If collectionMode is on,\n     * specifies whether to snap to the new arrangement immediately or to animate to it.\n     * @param {String|CanvasGradient|CanvasPattern|Function} [options.placeholderFillStyle] - See {@link OpenSeadragon.Options}.\n     * @fires OpenSeadragon.World.event:add-item\n     * @fires OpenSeadragon.Viewer.event:add-item-failed\n     */\n    addTiledImage: function( options ) {\n        $.console.assert(options, \"[Viewer.addTiledImage] options is required\");\n        $.console.assert(options.tileSource, \"[Viewer.addTiledImage] options.tileSource is required\");\n        $.console.assert(!options.replace || (options.index > -1 && options.index < this.world.getItemCount()),\n            \"[Viewer.addTiledImage] if options.replace is used, options.index must be a valid index in Viewer.world\");\n\n        var _this = this;\n\n        if (options.replace) {\n            options.replaceItem = _this.world.getItemAt(options.index);\n        }\n\n        this._hideMessage();\n\n        if (options.placeholderFillStyle === undefined) {\n            options.placeholderFillStyle = this.placeholderFillStyle;\n        }\n        if (options.opacity === undefined) {\n            options.opacity = this.opacity;\n        }\n        if (options.preload === undefined) {\n            options.preload = this.preload;\n        }\n        if (options.compositeOperation === undefined) {\n            options.compositeOperation = this.compositeOperation;\n        }\n        if (options.crossOriginPolicy === undefined) {\n            options.crossOriginPolicy = options.tileSource.crossOriginPolicy !== undefined ? options.tileSource.crossOriginPolicy : this.crossOriginPolicy;\n        }\n        if (options.ajaxWithCredentials === undefined) {\n            options.ajaxWithCredentials = this.ajaxWithCredentials;\n        }\n        if (options.loadTilesWithAjax === undefined) {\n            options.loadTilesWithAjax = this.loadTilesWithAjax;\n        }\n        if (options.ajaxHeaders === undefined || options.ajaxHeaders === null) {\n            options.ajaxHeaders = this.ajaxHeaders;\n        } else if ($.isPlainObject(options.ajaxHeaders) && $.isPlainObject(this.ajaxHeaders)) {\n            options.ajaxHeaders = $.extend({}, this.ajaxHeaders, options.ajaxHeaders);\n        }\n\n        var myQueueItem = {\n            options: options\n        };\n\n        function raiseAddItemFailed( event ) {\n            for (var i = 0; i < _this._loadQueue.length; i++) {\n                if (_this._loadQueue[i] === myQueueItem) {\n                    _this._loadQueue.splice(i, 1);\n                    break;\n                }\n            }\n\n            if (_this._loadQueue.length === 0) {\n                refreshWorld(myQueueItem);\n            }\n\n             /**\n             * Raised when an error occurs while adding a item.\n             * @event add-item-failed\n             * @memberOf OpenSeadragon.Viewer\n             * @type {object}\n             * @property {OpenSeadragon.Viewer} eventSource - A reference to the Viewer which raised the event.\n             * @property {String} message\n             * @property {String} source\n             * @property {Object} options The options passed to the addTiledImage method.\n             * @property {?Object} userData - Arbitrary subscriber-defined object.\n             */\n            _this.raiseEvent( 'add-item-failed', event );\n\n            if (options.error) {\n                options.error(event);\n            }\n        }\n\n        function refreshWorld(theItem) {\n            if (_this.collectionMode) {\n                _this.world.arrange({\n                    immediately: theItem.options.collectionImmediately,\n                    rows: _this.collectionRows,\n                    columns: _this.collectionColumns,\n                    layout: _this.collectionLayout,\n                    tileSize: _this.collectionTileSize,\n                    tileMargin: _this.collectionTileMargin\n                });\n                _this.world.setAutoRefigureSizes(true);\n            }\n        }\n\n        if ($.isArray(options.tileSource)) {\n            setTimeout(function() {\n                raiseAddItemFailed({\n                    message: \"[Viewer.addTiledImage] Sequences can not be added; add them one at a time instead.\",\n                    source: options.tileSource,\n                    options: options\n                });\n            });\n            return;\n        }\n\n        this._loadQueue.push(myQueueItem);\n\n        function processReadyItems() {\n            var queueItem, tiledImage, optionsClone;\n            while (_this._loadQueue.length) {\n                queueItem = _this._loadQueue[0];\n                if (!queueItem.tileSource) {\n                    break;\n                }\n\n                _this._loadQueue.splice(0, 1);\n\n                if (queueItem.options.replace) {\n                    var newIndex = _this.world.getIndexOfItem(queueItem.options.replaceItem);\n                    if (newIndex !== -1) {\n                        queueItem.options.index = newIndex;\n                    }\n                    _this.world.removeItem(queueItem.options.replaceItem);\n                }\n\n                tiledImage = new $.TiledImage({\n                    viewer: _this,\n                    source: queueItem.tileSource,\n                    viewport: _this.viewport,\n                    drawer: _this.drawer,\n                    tileCache: _this.tileCache,\n                    imageLoader: _this.imageLoader,\n                    x: queueItem.options.x,\n                    y: queueItem.options.y,\n                    width: queueItem.options.width,\n                    height: queueItem.options.height,\n                    fitBounds: queueItem.options.fitBounds,\n                    fitBoundsPlacement: queueItem.options.fitBoundsPlacement,\n                    clip: queueItem.options.clip,\n                    placeholderFillStyle: queueItem.options.placeholderFillStyle,\n                    opacity: queueItem.options.opacity,\n                    preload: queueItem.options.preload,\n                    degrees: queueItem.options.degrees,\n                    flipped: queueItem.options.flipped,\n                    compositeOperation: queueItem.options.compositeOperation,\n                    springStiffness: _this.springStiffness,\n                    animationTime: _this.animationTime,\n                    minZoomImageRatio: _this.minZoomImageRatio,\n                    wrapHorizontal: _this.wrapHorizontal,\n                    wrapVertical: _this.wrapVertical,\n                    immediateRender: _this.immediateRender,\n                    blendTime: _this.blendTime,\n                    alwaysBlend: _this.alwaysBlend,\n                    minPixelRatio: _this.minPixelRatio,\n                    smoothTileEdgesMinZoom: _this.smoothTileEdgesMinZoom,\n                    iOSDevice: _this.iOSDevice,\n                    crossOriginPolicy: queueItem.options.crossOriginPolicy,\n                    ajaxWithCredentials: queueItem.options.ajaxWithCredentials,\n                    loadTilesWithAjax: queueItem.options.loadTilesWithAjax,\n                    ajaxHeaders: queueItem.options.ajaxHeaders,\n                    debugMode: _this.debugMode,\n                    subPixelRoundingForTransparency: _this.subPixelRoundingForTransparency\n                });\n\n                if (_this.collectionMode) {\n                    _this.world.setAutoRefigureSizes(false);\n                }\n\n                if (_this.navigator) {\n                    optionsClone = $.extend({}, queueItem.options, {\n                        replace: false, // navigator already removed the layer, nothing to replace\n                        originalTiledImage: tiledImage,\n                        tileSource: queueItem.tileSource\n                    });\n\n                    _this.navigator.addTiledImage(optionsClone);\n                }\n\n                _this.world.addItem( tiledImage, {\n                    index: queueItem.options.index\n                });\n\n                if (_this._loadQueue.length === 0) {\n                    //this restores the autoRefigureSizes flag to true.\n                    refreshWorld(queueItem);\n                }\n\n                if (_this.world.getItemCount() === 1 && !_this.preserveViewport) {\n                    _this.viewport.goHome(true);\n                }\n\n                if (queueItem.options.success) {\n                    queueItem.options.success({\n                        item: tiledImage\n                    });\n                }\n            }\n        }\n\n        getTileSourceImplementation( this, options.tileSource, options, function( tileSource ) {\n\n            myQueueItem.tileSource = tileSource;\n\n            // add everybody at the front of the queue that's ready to go\n            processReadyItems();\n        }, function( event ) {\n            event.options = options;\n            raiseAddItemFailed(event);\n\n            // add everybody at the front of the queue that's ready to go\n            processReadyItems();\n        } );\n    },\n\n    /**\n     * Add a simple image to the viewer.\n     * The options are the same as the ones in {@link OpenSeadragon.Viewer#addTiledImage}\n     * except for options.tileSource which is replaced by options.url.\n     * @function\n     * @param {Object} options - See {@link OpenSeadragon.Viewer#addTiledImage}\n     * for all the options\n     * @param {String} options.url - The URL of the image to add.\n     * @fires OpenSeadragon.World.event:add-item\n     * @fires OpenSeadragon.Viewer.event:add-item-failed\n     */\n    addSimpleImage: function(options) {\n        $.console.assert(options, \"[Viewer.addSimpleImage] options is required\");\n        $.console.assert(options.url, \"[Viewer.addSimpleImage] options.url is required\");\n\n        var opts = $.extend({}, options, {\n            tileSource: {\n                type: 'image',\n                url:  options.url\n            }\n        });\n        delete opts.url;\n        this.addTiledImage(opts);\n    },\n\n    // deprecated\n    addLayer: function( options ) {\n        var _this = this;\n\n        $.console.error( \"[Viewer.addLayer] this function is deprecated; use Viewer.addTiledImage() instead.\" );\n\n        var optionsClone = $.extend({}, options, {\n            success: function(event) {\n                _this.raiseEvent(\"add-layer\", {\n                    options: options,\n                    drawer: event.item\n                });\n            },\n            error: function(event) {\n                _this.raiseEvent(\"add-layer-failed\", event);\n            }\n        });\n\n        this.addTiledImage(optionsClone);\n        return this;\n    },\n\n    // deprecated\n    getLayerAtLevel: function( level ) {\n        $.console.error( \"[Viewer.getLayerAtLevel] this function is deprecated; use World.getItemAt() instead.\" );\n        return this.world.getItemAt(level);\n    },\n\n    // deprecated\n    getLevelOfLayer: function( drawer ) {\n        $.console.error( \"[Viewer.getLevelOfLayer] this function is deprecated; use World.getIndexOfItem() instead.\" );\n        return this.world.getIndexOfItem(drawer);\n    },\n\n    // deprecated\n    getLayersCount: function() {\n        $.console.error( \"[Viewer.getLayersCount] this function is deprecated; use World.getItemCount() instead.\" );\n        return this.world.getItemCount();\n    },\n\n    // deprecated\n    setLayerLevel: function( drawer, level ) {\n        $.console.error( \"[Viewer.setLayerLevel] this function is deprecated; use World.setItemIndex() instead.\" );\n        return this.world.setItemIndex(drawer, level);\n    },\n\n    // deprecated\n    removeLayer: function( drawer ) {\n        $.console.error( \"[Viewer.removeLayer] this function is deprecated; use World.removeItem() instead.\" );\n        return this.world.removeItem(drawer);\n    },\n\n    /**\n     * Force the viewer to redraw its contents.\n     * @returns {OpenSeadragon.Viewer} Chainable.\n     */\n    forceRedraw: function() {\n        THIS[ this.hash ].forceRedraw = true;\n        return this;\n    },\n\n    /**\n     * @function\n     * @return {OpenSeadragon.Viewer} Chainable.\n     */\n    bindSequenceControls: function(){\n\n        //////////////////////////////////////////////////////////////////////////\n        // Image Sequence Controls\n        //////////////////////////////////////////////////////////////////////////\n        var onFocusHandler          = $.delegate( this, onFocus ),\n            onBlurHandler           = $.delegate( this, onBlur ),\n            onNextHandler           = $.delegate( this, this.goToNextPage ),\n            onPreviousHandler       = $.delegate( this, this.goToPreviousPage ),\n            navImages               = this.navImages,\n            useGroup                = true;\n\n        if( this.showSequenceControl ){\n\n            if( this.previousButton || this.nextButton ){\n                //if we are binding to custom buttons then layout and\n                //grouping is the responsibility of the page author\n                useGroup = false;\n            }\n\n            this.previousButton = new $.Button({\n                element:    this.previousButton ? $.getElement( this.previousButton ) : null,\n                clickTimeThreshold: this.clickTimeThreshold,\n                clickDistThreshold: this.clickDistThreshold,\n                tooltip:    $.getString( \"Tooltips.PreviousPage\" ),\n                srcRest:    resolveUrl( this.prefixUrl, navImages.previous.REST ),\n                srcGroup:   resolveUrl( this.prefixUrl, navImages.previous.GROUP ),\n                srcHover:   resolveUrl( this.prefixUrl, navImages.previous.HOVER ),\n                srcDown:    resolveUrl( this.prefixUrl, navImages.previous.DOWN ),\n                onRelease:  onPreviousHandler,\n                onFocus:    onFocusHandler,\n                onBlur:     onBlurHandler\n            });\n\n            this.nextButton = new $.Button({\n                element:    this.nextButton ? $.getElement( this.nextButton ) : null,\n                clickTimeThreshold: this.clickTimeThreshold,\n                clickDistThreshold: this.clickDistThreshold,\n                tooltip:    $.getString( \"Tooltips.NextPage\" ),\n                srcRest:    resolveUrl( this.prefixUrl, navImages.next.REST ),\n                srcGroup:   resolveUrl( this.prefixUrl, navImages.next.GROUP ),\n                srcHover:   resolveUrl( this.prefixUrl, navImages.next.HOVER ),\n                srcDown:    resolveUrl( this.prefixUrl, navImages.next.DOWN ),\n                onRelease:  onNextHandler,\n                onFocus:    onFocusHandler,\n                onBlur:     onBlurHandler\n            });\n\n            if( !this.navPrevNextWrap ){\n                this.previousButton.disable();\n            }\n\n            if (!this.tileSources || !this.tileSources.length) {\n                this.nextButton.disable();\n            }\n\n            if( useGroup ){\n                this.paging = new $.ButtonGroup({\n                    buttons: [\n                        this.previousButton,\n                        this.nextButton\n                    ],\n                    clickTimeThreshold: this.clickTimeThreshold,\n                    clickDistThreshold: this.clickDistThreshold\n                });\n\n                this.pagingControl = this.paging.element;\n\n                if( this.toolbar ){\n                    this.toolbar.addControl(\n                        this.pagingControl,\n                        {anchor: $.ControlAnchor.BOTTOM_RIGHT}\n                    );\n                }else{\n                    this.addControl(\n                        this.pagingControl,\n                        {anchor: this.sequenceControlAnchor || $.ControlAnchor.TOP_LEFT}\n                    );\n                }\n            }\n        }\n        return this;\n    },\n\n\n    /**\n     * @function\n     * @return {OpenSeadragon.Viewer} Chainable.\n     */\n    bindStandardControls: function(){\n        //////////////////////////////////////////////////////////////////////////\n        // Navigation Controls\n        //////////////////////////////////////////////////////////////////////////\n        var beginZoomingInHandler   = $.delegate( this, beginZoomingIn ),\n            endZoomingHandler       = $.delegate( this, endZooming ),\n            doSingleZoomInHandler   = $.delegate( this, doSingleZoomIn ),\n            beginZoomingOutHandler  = $.delegate( this, beginZoomingOut ),\n            doSingleZoomOutHandler  = $.delegate( this, doSingleZoomOut ),\n            onHomeHandler           = $.delegate( this, onHome ),\n            onFullScreenHandler     = $.delegate( this, onFullScreen ),\n            onRotateLeftHandler     = $.delegate( this, onRotateLeft ),\n            onRotateRightHandler    = $.delegate( this, onRotateRight ),\n            onFlipHandler           = $.delegate( this, onFlip),\n            onFocusHandler          = $.delegate( this, onFocus ),\n            onBlurHandler           = $.delegate( this, onBlur ),\n            navImages               = this.navImages,\n            buttons                 = [],\n            useGroup                = true;\n\n\n        if ( this.showNavigationControl ) {\n\n            if( this.zoomInButton || this.zoomOutButton ||\n                this.homeButton || this.fullPageButton ||\n                this.rotateLeftButton || this.rotateRightButton ||\n                this.flipButton ) {\n                //if we are binding to custom buttons then layout and\n                //grouping is the responsibility of the page author\n                useGroup = false;\n            }\n\n            if ( this.showZoomControl ) {\n                buttons.push( this.zoomInButton = new $.Button({\n                    element:    this.zoomInButton ? $.getElement( this.zoomInButton ) : null,\n                    clickTimeThreshold: this.clickTimeThreshold,\n                    clickDistThreshold: this.clickDistThreshold,\n                    tooltip:    $.getString( \"Tooltips.ZoomIn\" ),\n                    srcRest:    resolveUrl( this.prefixUrl, navImages.zoomIn.REST ),\n                    srcGroup:   resolveUrl( this.prefixUrl, navImages.zoomIn.GROUP ),\n                    srcHover:   resolveUrl( this.prefixUrl, navImages.zoomIn.HOVER ),\n                    srcDown:    resolveUrl( this.prefixUrl, navImages.zoomIn.DOWN ),\n                    onPress:    beginZoomingInHandler,\n                    onRelease:  endZoomingHandler,\n                    onClick:    doSingleZoomInHandler,\n                    onEnter:    beginZoomingInHandler,\n                    onExit:     endZoomingHandler,\n                    onFocus:    onFocusHandler,\n                    onBlur:     onBlurHandler\n                }));\n\n                buttons.push( this.zoomOutButton = new $.Button({\n                    element:    this.zoomOutButton ? $.getElement( this.zoomOutButton ) : null,\n                    clickTimeThreshold: this.clickTimeThreshold,\n                    clickDistThreshold: this.clickDistThreshold,\n                    tooltip:    $.getString( \"Tooltips.ZoomOut\" ),\n                    srcRest:    resolveUrl( this.prefixUrl, navImages.zoomOut.REST ),\n                    srcGroup:   resolveUrl( this.prefixUrl, navImages.zoomOut.GROUP ),\n                    srcHover:   resolveUrl( this.prefixUrl, navImages.zoomOut.HOVER ),\n                    srcDown:    resolveUrl( this.prefixUrl, navImages.zoomOut.DOWN ),\n                    onPress:    beginZoomingOutHandler,\n                    onRelease:  endZoomingHandler,\n                    onClick:    doSingleZoomOutHandler,\n                    onEnter:    beginZoomingOutHandler,\n                    onExit:     endZoomingHandler,\n                    onFocus:    onFocusHandler,\n                    onBlur:     onBlurHandler\n                }));\n            }\n\n            if ( this.showHomeControl ) {\n                buttons.push( this.homeButton = new $.Button({\n                    element:    this.homeButton ? $.getElement( this.homeButton ) : null,\n                    clickTimeThreshold: this.clickTimeThreshold,\n                    clickDistThreshold: this.clickDistThreshold,\n                    tooltip:    $.getString( \"Tooltips.Home\" ),\n                    srcRest:    resolveUrl( this.prefixUrl, navImages.home.REST ),\n                    srcGroup:   resolveUrl( this.prefixUrl, navImages.home.GROUP ),\n                    srcHover:   resolveUrl( this.prefixUrl, navImages.home.HOVER ),\n                    srcDown:    resolveUrl( this.prefixUrl, navImages.home.DOWN ),\n                    onRelease:  onHomeHandler,\n                    onFocus:    onFocusHandler,\n                    onBlur:     onBlurHandler\n                }));\n            }\n\n            if ( this.showFullPageControl ) {\n                buttons.push( this.fullPageButton = new $.Button({\n                    element:    this.fullPageButton ? $.getElement( this.fullPageButton ) : null,\n                    clickTimeThreshold: this.clickTimeThreshold,\n                    clickDistThreshold: this.clickDistThreshold,\n                    tooltip:    $.getString( \"Tooltips.FullPage\" ),\n                    srcRest:    resolveUrl( this.prefixUrl, navImages.fullpage.REST ),\n                    srcGroup:   resolveUrl( this.prefixUrl, navImages.fullpage.GROUP ),\n                    srcHover:   resolveUrl( this.prefixUrl, navImages.fullpage.HOVER ),\n                    srcDown:    resolveUrl( this.prefixUrl, navImages.fullpage.DOWN ),\n                    onRelease:  onFullScreenHandler,\n                    onFocus:    onFocusHandler,\n                    onBlur:     onBlurHandler\n                }));\n            }\n\n            if ( this.showRotationControl ) {\n                buttons.push( this.rotateLeftButton = new $.Button({\n                    element:    this.rotateLeftButton ? $.getElement( this.rotateLeftButton ) : null,\n                    clickTimeThreshold: this.clickTimeThreshold,\n                    clickDistThreshold: this.clickDistThreshold,\n                    tooltip:    $.getString( \"Tooltips.RotateLeft\" ),\n                    srcRest:    resolveUrl( this.prefixUrl, navImages.rotateleft.REST ),\n                    srcGroup:   resolveUrl( this.prefixUrl, navImages.rotateleft.GROUP ),\n                    srcHover:   resolveUrl( this.prefixUrl, navImages.rotateleft.HOVER ),\n                    srcDown:    resolveUrl( this.prefixUrl, navImages.rotateleft.DOWN ),\n                    onRelease:  onRotateLeftHandler,\n                    onFocus:    onFocusHandler,\n                    onBlur:     onBlurHandler\n                }));\n\n                buttons.push( this.rotateRightButton = new $.Button({\n                    element:    this.rotateRightButton ? $.getElement( this.rotateRightButton ) : null,\n                    clickTimeThreshold: this.clickTimeThreshold,\n                    clickDistThreshold: this.clickDistThreshold,\n                    tooltip:    $.getString( \"Tooltips.RotateRight\" ),\n                    srcRest:    resolveUrl( this.prefixUrl, navImages.rotateright.REST ),\n                    srcGroup:   resolveUrl( this.prefixUrl, navImages.rotateright.GROUP ),\n                    srcHover:   resolveUrl( this.prefixUrl, navImages.rotateright.HOVER ),\n                    srcDown:    resolveUrl( this.prefixUrl, navImages.rotateright.DOWN ),\n                    onRelease:  onRotateRightHandler,\n                    onFocus:    onFocusHandler,\n                    onBlur:     onBlurHandler\n                }));\n            }\n\n            if ( this.showFlipControl ) {\n                buttons.push( this.flipButton = new $.Button({\n                    element:    this.flipButton ? $.getElement( this.flipButton ) : null,\n                    clickTimeThreshold: this.clickTimeThreshold,\n                    clickDistThreshold: this.clickDistThreshold,\n                    tooltip:    $.getString( \"Tooltips.Flip\" ),\n                    srcRest:    resolveUrl( this.prefixUrl, navImages.flip.REST ),\n                    srcGroup:   resolveUrl( this.prefixUrl, navImages.flip.GROUP ),\n                    srcHover:   resolveUrl( this.prefixUrl, navImages.flip.HOVER ),\n                    srcDown:    resolveUrl( this.prefixUrl, navImages.flip.DOWN ),\n                    onRelease:  onFlipHandler,\n                    onFocus:    onFocusHandler,\n                    onBlur:     onBlurHandler\n                }));\n            }\n\n            if ( useGroup ) {\n                this.buttonGroup = new $.ButtonGroup({\n                    buttons:            buttons,\n                    clickTimeThreshold: this.clickTimeThreshold,\n                    clickDistThreshold: this.clickDistThreshold\n                });\n\n                this.navControl  = this.buttonGroup.element;\n                this.addHandler( 'open', $.delegate( this, lightUp ) );\n\n                if( this.toolbar ){\n                    this.toolbar.addControl(\n                        this.navControl,\n                        {anchor: this.navigationControlAnchor || $.ControlAnchor.TOP_LEFT}\n                    );\n                } else {\n                    this.addControl(\n                        this.navControl,\n                        {anchor: this.navigationControlAnchor || $.ControlAnchor.TOP_LEFT}\n                    );\n                }\n            } else {\n                this.customButtons = buttons;\n            }\n\n        }\n        return this;\n    },\n\n    /**\n     * Gets the active page of a sequence\n     * @function\n     * @return {Number}\n     */\n    currentPage: function() {\n        return this._sequenceIndex;\n    },\n\n    /**\n     * @function\n     * @return {OpenSeadragon.Viewer} Chainable.\n     * @fires OpenSeadragon.Viewer.event:page\n     */\n    goToPage: function( page ){\n        if( this.tileSources && page >= 0 && page < this.tileSources.length ){\n            this._sequenceIndex = page;\n\n            this._updateSequenceButtons( page );\n\n            this.open( this.tileSources[ page ] );\n\n            if( this.referenceStrip ){\n                this.referenceStrip.setFocus( page );\n            }\n\n            /**\n             * Raised when the page is changed on a viewer configured with multiple image sources (see {@link OpenSeadragon.Viewer#goToPage}).\n             *\n             * @event page\n             * @memberof OpenSeadragon.Viewer\n             * @type {Object}\n             * @property {OpenSeadragon.Viewer} eventSource - A reference to the Viewer which raised the event.\n             * @property {Number} page - The page index.\n             * @property {?Object} userData - Arbitrary subscriber-defined object.\n             */\n            this.raiseEvent( 'page', { page: page } );\n        }\n\n        return this;\n    },\n\n   /**\n     * Adds an html element as an overlay to the current viewport.  Useful for\n     * highlighting words or areas of interest on an image or other zoomable\n     * interface. The overlays added via this method are removed when the viewport\n     * is closed which include when changing page.\n     * @method\n     * @param {Element|String|Object} element - A reference to an element or an id for\n     *      the element which will be overlaid. Or an Object specifying the configuration for the overlay.\n     *      If using an object, see {@link OpenSeadragon.Overlay} for a list of\n     *      all available options.\n     * @param {OpenSeadragon.Point|OpenSeadragon.Rect} location - The point or\n     *      rectangle which will be overlaid. This is a viewport relative location.\n     * @param {OpenSeadragon.Placement} [placement=OpenSeadragon.Placement.TOP_LEFT] - The position of the\n     *      viewport which the location coordinates will be treated as relative\n     *      to.\n     * @param {function} [onDraw] - If supplied the callback is called when the overlay\n     *      needs to be drawn. It it the responsibility of the callback to do any drawing/positioning.\n     *      It is passed position, size and element.\n     * @return {OpenSeadragon.Viewer} Chainable.\n     * @fires OpenSeadragon.Viewer.event:add-overlay\n     */\n    addOverlay: function( element, location, placement, onDraw ) {\n        var options;\n        if( $.isPlainObject( element ) ){\n            options = element;\n        } else {\n            options = {\n                element: element,\n                location: location,\n                placement: placement,\n                onDraw: onDraw\n            };\n        }\n\n        element = $.getElement( options.element );\n\n        if ( getOverlayIndex( this.currentOverlays, element ) >= 0 ) {\n            // they're trying to add a duplicate overlay\n            return this;\n        }\n\n        var overlay = getOverlayObject( this, options);\n        this.currentOverlays.push(overlay);\n        overlay.drawHTML( this.overlaysContainer, this.viewport );\n\n        /**\n         * Raised when an overlay is added to the viewer (see {@link OpenSeadragon.Viewer#addOverlay}).\n         *\n         * @event add-overlay\n         * @memberof OpenSeadragon.Viewer\n         * @type {object}\n         * @property {OpenSeadragon.Viewer} eventSource - A reference to the Viewer which raised the event.\n         * @property {Element} element - The overlay element.\n         * @property {OpenSeadragon.Point|OpenSeadragon.Rect} location\n         * @property {OpenSeadragon.Placement} placement\n         * @property {?Object} userData - Arbitrary subscriber-defined object.\n         */\n        this.raiseEvent( 'add-overlay', {\n            element: element,\n            location: options.location,\n            placement: options.placement\n        });\n        return this;\n    },\n\n    /**\n     * Updates the overlay represented by the reference to the element or\n     * element id moving it to the new location, relative to the new placement.\n     * @method\n     * @param {Element|String} element - A reference to an element or an id for\n     *      the element which is overlaid.\n     * @param {OpenSeadragon.Point|OpenSeadragon.Rect} location - The point or\n     *      rectangle which will be overlaid. This is a viewport relative location.\n     * @param {OpenSeadragon.Placement} [placement=OpenSeadragon.Placement.TOP_LEFT] - The position of the\n     *      viewport which the location coordinates will be treated as relative\n     *      to.\n     * @return {OpenSeadragon.Viewer} Chainable.\n     * @fires OpenSeadragon.Viewer.event:update-overlay\n     */\n    updateOverlay: function( element, location, placement ) {\n        var i;\n\n        element = $.getElement( element );\n        i = getOverlayIndex( this.currentOverlays, element );\n\n        if ( i >= 0 ) {\n            this.currentOverlays[ i ].update( location, placement );\n            THIS[ this.hash ].forceRedraw = true;\n            /**\n             * Raised when an overlay's location or placement changes\n             * (see {@link OpenSeadragon.Viewer#updateOverlay}).\n             *\n             * @event update-overlay\n             * @memberof OpenSeadragon.Viewer\n             * @type {object}\n             * @property {OpenSeadragon.Viewer} eventSource - A reference to the\n             * Viewer which raised the event.\n             * @property {Element} element\n             * @property {OpenSeadragon.Point|OpenSeadragon.Rect} location\n             * @property {OpenSeadragon.Placement} placement\n             * @property {?Object} userData - Arbitrary subscriber-defined object.\n             */\n            this.raiseEvent( 'update-overlay', {\n                element: element,\n                location: location,\n                placement: placement\n            });\n        }\n        return this;\n    },\n\n    /**\n     * Removes an overlay identified by the reference element or element id\n     * and schedules an update.\n     * @method\n     * @param {Element|String} element - A reference to the element or an\n     *      element id which represent the ovelay content to be removed.\n     * @return {OpenSeadragon.Viewer} Chainable.\n     * @fires OpenSeadragon.Viewer.event:remove-overlay\n     */\n    removeOverlay: function( element ) {\n        var i;\n\n        element = $.getElement( element );\n        i = getOverlayIndex( this.currentOverlays, element );\n\n        if ( i >= 0 ) {\n            this.currentOverlays[ i ].destroy();\n            this.currentOverlays.splice( i, 1 );\n            THIS[ this.hash ].forceRedraw = true;\n            /**\n             * Raised when an overlay is removed from the viewer\n             * (see {@link OpenSeadragon.Viewer#removeOverlay}).\n             *\n             * @event remove-overlay\n             * @memberof OpenSeadragon.Viewer\n             * @type {object}\n             * @property {OpenSeadragon.Viewer} eventSource - A reference to the\n             * Viewer which raised the event.\n             * @property {Element} element - The overlay element.\n             * @property {?Object} userData - Arbitrary subscriber-defined object.\n             */\n            this.raiseEvent( 'remove-overlay', {\n                element: element\n            });\n        }\n        return this;\n    },\n\n    /**\n     * Removes all currently configured Overlays from this Viewer and schedules\n     * an update.\n     * @method\n     * @return {OpenSeadragon.Viewer} Chainable.\n     * @fires OpenSeadragon.Viewer.event:clear-overlay\n     */\n    clearOverlays: function() {\n        while ( this.currentOverlays.length > 0 ) {\n            this.currentOverlays.pop().destroy();\n        }\n        THIS[ this.hash ].forceRedraw = true;\n        /**\n         * Raised when all overlays are removed from the viewer (see {@link OpenSeadragon.Drawer#clearOverlays}).\n         *\n         * @event clear-overlay\n         * @memberof OpenSeadragon.Viewer\n         * @type {object}\n         * @property {OpenSeadragon.Viewer} eventSource - A reference to the Viewer which raised the event.\n         * @property {?Object} userData - Arbitrary subscriber-defined object.\n         */\n        this.raiseEvent( 'clear-overlay', {} );\n        return this;\n    },\n\n     /**\n     * Finds an overlay identified by the reference element or element id\n     * and returns it as an object, return null if not found.\n     * @method\n     * @param {Element|String} element - A reference to the element or an\n     *      element id which represents the overlay content.\n     * @return {OpenSeadragon.Overlay} the matching overlay or null if none found.\n     */\n    getOverlayById: function( element ) {\n        var i;\n\n        element = $.getElement( element );\n        i = getOverlayIndex( this.currentOverlays, element );\n\n        if (i >= 0) {\n            return this.currentOverlays[i];\n        } else {\n            return null;\n        }\n    },\n\n    /**\n     * Updates the sequence buttons.\n     * @function OpenSeadragon.Viewer.prototype._updateSequenceButtons\n     * @private\n     * @param {Number} Sequence Value\n     */\n    _updateSequenceButtons: function( page ) {\n\n            if ( this.nextButton ) {\n                if(!this.tileSources || this.tileSources.length - 1 === page) {\n                    //Disable next button\n                    if ( !this.navPrevNextWrap ) {\n                        this.nextButton.disable();\n                    }\n                } else {\n                    this.nextButton.enable();\n                }\n            }\n            if ( this.previousButton ) {\n                if ( page > 0 ) {\n                    //Enable previous button\n                    this.previousButton.enable();\n                } else {\n                    if ( !this.navPrevNextWrap ) {\n                        this.previousButton.disable();\n                    }\n                }\n            }\n      },\n\n    /**\n     * Display a message in the viewport\n     * @function OpenSeadragon.Viewer.prototype._showMessage\n     * @private\n     * @param {String} text message\n     */\n    _showMessage: function ( message ) {\n        this._hideMessage();\n\n        var div = $.makeNeutralElement( \"div\" );\n        div.appendChild( document.createTextNode( message ) );\n\n        this.messageDiv = $.makeCenteredNode( div );\n\n        $.addClass(this.messageDiv, \"openseadragon-message\");\n\n        this.container.appendChild( this.messageDiv );\n    },\n\n    /**\n     * Hide any currently displayed viewport message\n     * @function OpenSeadragon.Viewer.prototype._hideMessage\n     * @private\n     */\n    _hideMessage: function () {\n        var div = this.messageDiv;\n        if (div) {\n            div.parentNode.removeChild(div);\n            delete this.messageDiv;\n        }\n    },\n\n    /**\n     * Gets this viewer's gesture settings for the given pointer device type.\n     * @method\n     * @param {String} type - The pointer device type to get the gesture settings for (\"mouse\", \"touch\", \"pen\", etc.).\n     * @return {OpenSeadragon.GestureSettings}\n     */\n    gestureSettingsByDeviceType: function ( type ) {\n        switch ( type ) {\n            case 'mouse':\n                return this.gestureSettingsMouse;\n            case 'touch':\n                return this.gestureSettingsTouch;\n            case 'pen':\n                return this.gestureSettingsPen;\n            default:\n                return this.gestureSettingsUnknown;\n        }\n    },\n\n    // private\n    _drawOverlays: function() {\n        var i,\n            length = this.currentOverlays.length;\n        for ( i = 0; i < length; i++ ) {\n            this.currentOverlays[ i ].drawHTML( this.overlaysContainer, this.viewport );\n        }\n    },\n\n    /**\n     * Cancel the \"in flight\" images.\n     */\n    _cancelPendingImages: function() {\n        this._loadQueue = [];\n    },\n\n    /**\n     * Removes the reference strip and disables displaying it.\n     * @function\n     */\n    removeReferenceStrip: function() {\n        this.showReferenceStrip = false;\n\n        if (this.referenceStrip) {\n            this.referenceStrip.destroy();\n            this.referenceStrip = null;\n        }\n    },\n\n    /**\n     * Enables and displays the reference strip based on the currently set tileSources.\n     * Works only when the Viewer has sequenceMode set to true.\n     * @function\n     */\n    addReferenceStrip: function() {\n        this.showReferenceStrip = true;\n\n        if (this.sequenceMode) {\n            if (this.referenceStrip) {\n                return;\n            }\n\n            if (this.tileSources.length && this.tileSources.length > 1) {\n                this.referenceStrip = new $.ReferenceStrip({\n                    id:          this.referenceStripElement,\n                    position:    this.referenceStripPosition,\n                    sizeRatio:   this.referenceStripSizeRatio,\n                    scroll:      this.referenceStripScroll,\n                    height:      this.referenceStripHeight,\n                    width:       this.referenceStripWidth,\n                    tileSources: this.tileSources,\n                    prefixUrl:   this.prefixUrl,\n                    useCanvas:   this.useCanvas,\n                    viewer:      this\n                });\n\n                this.referenceStrip.setFocus( this._sequenceIndex );\n            }\n        } else {\n            $.console.warn('Attempting to display a reference strip while \"sequenceMode\" is off.');\n        }\n    },\n\n    /**\n     * Adds _updatePixelDensityRatio to the window resize event.\n     * @private\n     */\n    _addUpdatePixelDensityRatioEvent: function() {\n        this._updatePixelDensityRatioBind = this._updatePixelDensityRatio.bind(this);\n        $.addEvent( window, 'resize', this._updatePixelDensityRatioBind );\n    },\n\n    /**\n     * Removes _updatePixelDensityRatio from the window resize event.\n     * @private\n     */\n    _removeUpdatePixelDensityRatioEvent: function() {\n        $.removeEvent( window, 'resize', this._updatePixelDensityRatioBind );\n    },\n\n    /**\n     * Update pixel density ratio, clears all tiles and triggers updates for\n     * all items if the ratio has changed.\n     * @private\n     */\n     _updatePixelDensityRatio: function() {\n        var previusPixelDensityRatio = $.pixelDensityRatio;\n        var currentPixelDensityRatio = $.getCurrentPixelDensityRatio();\n        if (previusPixelDensityRatio !== currentPixelDensityRatio) {\n            $.pixelDensityRatio = currentPixelDensityRatio;\n            this.world.resetItems();\n            this.forceRedraw();\n        }\n    },\n\n    /**\n     * Sets the image source to the source with index equal to\n     * currentIndex - 1. Changes current image in sequence mode.\n     * If specified, wraps around (see navPrevNextWrap in\n     * {@link OpenSeadragon.Options})\n     *\n     * @method\n     */\n\n    goToPreviousPage: function () {\n        var previous = this._sequenceIndex - 1;\n        if(this.navPrevNextWrap && previous < 0){\n            previous += this.tileSources.length;\n        }\n        this.goToPage( previous );\n    },\n\n    /**\n     * Sets the image source to the source with index equal to\n     * currentIndex + 1. Changes current image in sequence mode.\n     * If specified, wraps around (see navPrevNextWrap in\n     * {@link OpenSeadragon.Options})\n     *\n     * @method\n     */\n    goToNextPage: function () {\n        var next = this._sequenceIndex + 1;\n        if(this.navPrevNextWrap && next >= this.tileSources.length){\n            next = 0;\n        }\n        this.goToPage( next );\n    },\n\n    isAnimating: function () {\n        return THIS[ this.hash ].animating;\n    },\n});\n\n\n/**\n * _getSafeElemSize is like getElementSize(), but refuses to return 0 for x or y,\n * which was causing some calling operations to return NaN.\n * @returns {Point}\n * @private\n */\nfunction _getSafeElemSize (oElement) {\n    oElement = $.getElement( oElement );\n\n    return new $.Point(\n        (oElement.clientWidth === 0 ? 1 : oElement.clientWidth),\n        (oElement.clientHeight === 0 ? 1 : oElement.clientHeight)\n    );\n}\n\n\n/**\n * @function\n * @private\n */\nfunction getTileSourceImplementation( viewer, tileSource, imgOptions, successCallback,\n    failCallback ) {\n    var _this = viewer;\n\n    //allow plain xml strings or json strings to be parsed here\n    if ( $.type( tileSource ) === 'string' ) {\n        //xml should start with \"<\" and end with \">\"\n        if ( tileSource.match( /^\\s*<.*>\\s*$/ ) ) {\n            tileSource = $.parseXml( tileSource );\n        //json should start with \"{\" or \"[\" and end with \"}\" or \"]\"\n        } else if ( tileSource.match(/^\\s*[{[].*[}\\]]\\s*$/ ) ) {\n            try {\n              var tileSourceJ = $.parseJSON(tileSource);\n              tileSource = tileSourceJ;\n            } catch (e) {\n              //tileSource = tileSource;\n            }\n        }\n    }\n\n    function waitUntilReady(tileSource, originalTileSource) {\n        if (tileSource.ready) {\n            successCallback(tileSource);\n        } else {\n            tileSource.addHandler('ready', function () {\n                successCallback(tileSource);\n            });\n            tileSource.addHandler('open-failed', function (event) {\n                failCallback({\n                    message: event.message,\n                    source: originalTileSource\n                });\n            });\n        }\n    }\n\n    setTimeout( function() {\n        if ( $.type( tileSource ) === 'string' ) {\n            //If its still a string it means it must be a url at this point\n            tileSource = new $.TileSource({\n                url: tileSource,\n                crossOriginPolicy: imgOptions.crossOriginPolicy !== undefined ?\n                    imgOptions.crossOriginPolicy : viewer.crossOriginPolicy,\n                ajaxWithCredentials: viewer.ajaxWithCredentials,\n                ajaxHeaders: imgOptions.ajaxHeaders ?\n                    imgOptions.ajaxHeaders : viewer.ajaxHeaders,\n                splitHashDataForPost: viewer.splitHashDataForPost,\n                useCanvas: viewer.useCanvas,\n                success: function( event ) {\n                    successCallback( event.tileSource );\n                }\n            });\n            tileSource.addHandler( 'open-failed', function( event ) {\n                failCallback( event );\n            } );\n\n        } else if ($.isPlainObject(tileSource) || tileSource.nodeType) {\n            if (tileSource.crossOriginPolicy === undefined &&\n                (imgOptions.crossOriginPolicy !== undefined || viewer.crossOriginPolicy !== undefined)) {\n                tileSource.crossOriginPolicy = imgOptions.crossOriginPolicy !== undefined ?\n                    imgOptions.crossOriginPolicy : viewer.crossOriginPolicy;\n            }\n            if (tileSource.ajaxWithCredentials === undefined) {\n                tileSource.ajaxWithCredentials = viewer.ajaxWithCredentials;\n            }\n            if (tileSource.useCanvas === undefined) {\n                tileSource.useCanvas = viewer.useCanvas;\n            }\n\n            if ( $.isFunction( tileSource.getTileUrl ) ) {\n                //Custom tile source\n                var customTileSource = new $.TileSource( tileSource );\n                customTileSource.getTileUrl = tileSource.getTileUrl;\n                successCallback( customTileSource );\n            } else {\n                //inline configuration\n                var $TileSource = $.TileSource.determineType( _this, tileSource );\n                if ( !$TileSource ) {\n                    failCallback( {\n                        message: \"Unable to load TileSource\",\n                        source: tileSource\n                    });\n                    return;\n                }\n                var options = $TileSource.prototype.configure.apply( _this, [ tileSource ] );\n                waitUntilReady(new $TileSource(options), tileSource);\n            }\n        } else {\n            //can assume it's already a tile source implementation\n            waitUntilReady(tileSource, tileSource);\n        }\n    });\n}\n\nfunction getOverlayObject( viewer, overlay ) {\n    if ( overlay instanceof $.Overlay ) {\n        return overlay;\n    }\n\n    var element = null;\n    if ( overlay.element ) {\n        element = $.getElement( overlay.element );\n    } else {\n        var id = overlay.id ?\n            overlay.id :\n            \"openseadragon-overlay-\" + Math.floor( Math.random() * 10000000 );\n\n        element = $.getElement( overlay.id );\n        if ( !element ) {\n            element         = document.createElement( \"a\" );\n            element.href    = \"#/overlay/\" + id;\n        }\n        element.id = id;\n        $.addClass( element, overlay.className ?\n            overlay.className :\n            \"openseadragon-overlay\"\n        );\n    }\n\n    var location = overlay.location;\n    var width = overlay.width;\n    var height = overlay.height;\n    if (!location) {\n        var x = overlay.x;\n        var y = overlay.y;\n        if (overlay.px !== undefined) {\n            var rect = viewer.viewport.imageToViewportRectangle(new $.Rect(\n                overlay.px,\n                overlay.py,\n                width || 0,\n                height || 0));\n            x = rect.x;\n            y = rect.y;\n            width = width !== undefined ? rect.width : undefined;\n            height = height !== undefined ? rect.height : undefined;\n        }\n        location = new $.Point(x, y);\n    }\n\n    var placement = overlay.placement;\n    if (placement && $.type(placement) === \"string\") {\n        placement = $.Placement[overlay.placement.toUpperCase()];\n    }\n\n    return new $.Overlay({\n        element: element,\n        location: location,\n        placement: placement,\n        onDraw: overlay.onDraw,\n        checkResize: overlay.checkResize,\n        width: width,\n        height: height,\n        rotationMode: overlay.rotationMode\n    });\n}\n\n/**\n * @private\n * @inner\n * Determines the index of the given overlay in the given overlays array.\n */\nfunction getOverlayIndex( overlays, element ) {\n    var i;\n    for ( i = overlays.length - 1; i >= 0; i-- ) {\n        if ( overlays[ i ].element === element ) {\n            return i;\n        }\n    }\n\n    return -1;\n}\n\n///////////////////////////////////////////////////////////////////////////////\n// Schedulers provide the general engine for animation\n///////////////////////////////////////////////////////////////////////////////\nfunction scheduleUpdate( viewer, updateFunc ){\n    return $.requestAnimationFrame( function(){\n        updateFunc( viewer );\n    } );\n}\n\n\n//provides a sequence in the fade animation\nfunction scheduleControlsFade( viewer ) {\n    $.requestAnimationFrame( function(){\n        updateControlsFade( viewer );\n    });\n}\n\n\n//initiates an animation to hide the controls\nfunction beginControlsAutoHide( viewer ) {\n    if ( !viewer.autoHideControls ) {\n        return;\n    }\n    viewer.controlsShouldFade = true;\n    viewer.controlsFadeBeginTime =\n        $.now() +\n        viewer.controlsFadeDelay;\n\n    window.setTimeout( function(){\n        scheduleControlsFade( viewer );\n    }, viewer.controlsFadeDelay );\n}\n\n\n//determines if fade animation is done or continues the animation\nfunction updateControlsFade( viewer ) {\n    var currentTime,\n        deltaTime,\n        opacity,\n        i;\n    if ( viewer.controlsShouldFade ) {\n        currentTime = $.now();\n        deltaTime = currentTime - viewer.controlsFadeBeginTime;\n        opacity = 1.0 - deltaTime / viewer.controlsFadeLength;\n\n        opacity = Math.min( 1.0, opacity );\n        opacity = Math.max( 0.0, opacity );\n\n        for ( i = viewer.controls.length - 1; i >= 0; i--) {\n            if (viewer.controls[ i ].autoFade) {\n                viewer.controls[ i ].setOpacity( opacity );\n            }\n        }\n\n        if ( opacity > 0 ) {\n            // fade again\n            scheduleControlsFade( viewer );\n        }\n    }\n}\n\n\n//stop the fade animation on the controls and show them\nfunction abortControlsAutoHide( viewer ) {\n    var i;\n    viewer.controlsShouldFade = false;\n    for ( i = viewer.controls.length - 1; i >= 0; i-- ) {\n        viewer.controls[ i ].setOpacity( 1.0 );\n    }\n}\n\n\n\n///////////////////////////////////////////////////////////////////////////////\n// Default view event handlers.\n///////////////////////////////////////////////////////////////////////////////\nfunction onFocus(){\n    abortControlsAutoHide( this );\n}\n\nfunction onBlur(){\n    beginControlsAutoHide( this );\n\n}\n\nfunction onCanvasContextMenu( event ) {\n    var eventArgs = {\n        tracker: event.eventSource,\n        position: event.position,\n        originalEvent: event.originalEvent,\n        preventDefault: event.preventDefault\n    };\n\n    /**\n     * Raised when a contextmenu event occurs in the {@link OpenSeadragon.Viewer#canvas} element.\n     *\n     * @event canvas-contextmenu\n     * @memberof OpenSeadragon.Viewer\n     * @type {object}\n     * @property {OpenSeadragon.Viewer} eventSource - A reference to the Viewer which raised this event.\n     * @property {OpenSeadragon.MouseTracker} tracker - A reference to the MouseTracker which originated this event.\n     * @property {OpenSeadragon.Point} position - The position of the event relative to the tracked element.\n     * @property {Object} originalEvent - The original DOM event.\n     * @property {Boolean} preventDefault - Set to true to prevent the default user-agent's handling of the contextmenu event.\n     * @property {?Object} userData - Arbitrary subscriber-defined object.\n     */\n    this.raiseEvent( 'canvas-contextmenu', eventArgs );\n\n    event.preventDefault = eventArgs.preventDefault;\n}\n\nfunction onCanvasKeyDown( event ) {\n    var canvasKeyDownEventArgs = {\n      originalEvent: event.originalEvent,\n      preventDefaultAction: false,\n      preventVerticalPan: event.preventVerticalPan || !this.panVertical,\n      preventHorizontalPan: event.preventHorizontalPan || !this.panHorizontal\n    };\n\n    /**\n     * Raised when a keyboard key is pressed and the focus is on the {@link OpenSeadragon.Viewer#canvas} element.\n     *\n     * @event canvas-key\n     * @memberof OpenSeadragon.Viewer\n     * @type {object}\n     * @property {OpenSeadragon.Viewer} eventSource - A reference to the Viewer which raised this event.\n     * @property {Object} originalEvent - The original DOM event.\n     * @property {Boolean} preventDefaultAction - Set to true to prevent default keyboard behaviour. Default: false.\n     * @property {Boolean} preventVerticalPan - Set to true to prevent keyboard vertical panning. Default: false.\n     * @property {Boolean} preventHorizontalPan - Set to true to prevent keyboard horizontal panning. Default: false.\n     * @property {?Object} userData - Arbitrary subscriber-defined object.\n     */\n\n    this.raiseEvent('canvas-key', canvasKeyDownEventArgs);\n\n    if ( !canvasKeyDownEventArgs.preventDefaultAction && !event.ctrl && !event.alt && !event.meta ) {\n        switch( event.keyCode ){\n            case 38://up arrow\n                if (!canvasKeyDownEventArgs.preventVerticalPan) {\n                  if ( event.shift ) {\n                    this.viewport.zoomBy(1.1);\n                  } else {\n                    this.viewport.panBy(this.viewport.deltaPointsFromPixels(new $.Point(0, -this.pixelsPerArrowPress)));\n                  }\n                  this.viewport.applyConstraints();\n                }\n                event.preventDefault = true;\n                break;\n            case 40://down arrow\n                if (!canvasKeyDownEventArgs.preventVerticalPan) {\n                  if ( event.shift ) {\n                    this.viewport.zoomBy(0.9);\n                  } else {\n                    this.viewport.panBy(this.viewport.deltaPointsFromPixels(new $.Point(0, this.pixelsPerArrowPress)));\n                  }\n                  this.viewport.applyConstraints();\n                }\n                event.preventDefault = true;\n                break;\n            case 37://left arrow\n                if (!canvasKeyDownEventArgs.preventHorizontalPan) {\n                  this.viewport.panBy(this.viewport.deltaPointsFromPixels(new $.Point(-this.pixelsPerArrowPress, 0)));\n                  this.viewport.applyConstraints();\n                }\n                event.preventDefault = true;\n                break;\n            case 39://right arrow\n                if (!canvasKeyDownEventArgs.preventHorizontalPan) {\n                  this.viewport.panBy(this.viewport.deltaPointsFromPixels(new $.Point(this.pixelsPerArrowPress, 0)));\n                  this.viewport.applyConstraints();\n                }\n                event.preventDefault = true;\n                break;\n            default:\n                //console.log( 'navigator keycode %s', event.keyCode );\n                event.preventDefault = false;\n                break;\n        }\n    } else {\n        event.preventDefault = false;\n    }\n}\nfunction onCanvasKeyPress( event ) {\n    var canvasKeyPressEventArgs = {\n      originalEvent: event.originalEvent,\n      preventDefaultAction: false,\n      preventVerticalPan: event.preventVerticalPan || !this.panVertical,\n      preventHorizontalPan: event.preventHorizontalPan || !this.panHorizontal\n    };\n\n    // This event is documented in onCanvasKeyDown\n    this.raiseEvent('canvas-key', canvasKeyPressEventArgs);\n\n    if ( !canvasKeyPressEventArgs.preventDefaultAction && !event.ctrl && !event.alt && !event.meta ) {\n        switch( event.keyCode ){\n            case 43://=|+\n            case 61://=|+\n                this.viewport.zoomBy(1.1);\n                this.viewport.applyConstraints();\n                event.preventDefault = true;\n                break;\n            case 45://-|_\n                this.viewport.zoomBy(0.9);\n                this.viewport.applyConstraints();\n                event.preventDefault = true;\n                break;\n            case 48://0|)\n                this.viewport.goHome();\n                this.viewport.applyConstraints();\n                event.preventDefault = true;\n                break;\n            case 119://w\n            case 87://W\n                if (!canvasKeyPressEventArgs.preventVerticalPan) {\n                    if ( event.shift ) {\n                        this.viewport.zoomBy(1.1);\n                    } else {\n                        this.viewport.panBy(this.viewport.deltaPointsFromPixels(new $.Point(0, -40)));\n                    }\n                    this.viewport.applyConstraints();\n                  }\n                  event.preventDefault = true;\n                  break;\n            case 115://s\n            case 83://S\n                if (!canvasKeyPressEventArgs.preventVerticalPan) {\n                  if ( event.shift ) {\n                    this.viewport.zoomBy(0.9);\n                  } else {\n                    this.viewport.panBy(this.viewport.deltaPointsFromPixels(new $.Point(0, 40)));\n                  }\n                  this.viewport.applyConstraints();\n                }\n                event.preventDefault = true;\n                break;\n            case 97://a\n                if (!canvasKeyPressEventArgs.preventHorizontalPan) {\n                    this.viewport.panBy(this.viewport.deltaPointsFromPixels(new $.Point(-40, 0)));\n                    this.viewport.applyConstraints();\n                }\n                event.preventDefault = true;\n                break;\n            case 100://d\n                if (!canvasKeyPressEventArgs.preventHorizontalPan) {\n                  this.viewport.panBy(this.viewport.deltaPointsFromPixels(new $.Point(40, 0)));\n                  this.viewport.applyConstraints();\n                }\n                event.preventDefault = true;\n                break;\n            case 114: //r - clockwise rotation\n              if(this.viewport.flipped){\n                this.viewport.setRotation($.positiveModulo(this.viewport.degrees - this.rotationIncrement, 360));\n              } else{\n                this.viewport.setRotation($.positiveModulo(this.viewport.degrees + this.rotationIncrement, 360));\n              }\n              this.viewport.applyConstraints();\n              event.preventDefault = true;\n              break;\n            case 82: //R - counterclockwise  rotation\n              if(this.viewport.flipped){\n                this.viewport.setRotation($.positiveModulo(this.viewport.degrees + this.rotationIncrement, 360));\n              } else{\n                this.viewport.setRotation($.positiveModulo(this.viewport.degrees - this.rotationIncrement, 360));\n              }\n              this.viewport.applyConstraints();\n              event.preventDefault = true;\n              break;\n            case 102: //f\n              this.viewport.toggleFlip();\n              event.preventDefault = true;\n              break;\n            case 106: //j - previous image source\n              this.goToPreviousPage();\n              break;\n            case 107: //k - next image source\n              this.goToNextPage();\n              break;\n            default:\n                // console.log( 'navigator keycode %s', event.keyCode );\n                event.preventDefault = false;\n                break;\n        }\n    } else {\n        event.preventDefault = false;\n    }\n}\n\nfunction onCanvasClick( event ) {\n    var gestureSettings;\n\n    var haveKeyboardFocus = document.activeElement === this.canvas;\n\n    // If we don't have keyboard focus, request it.\n    if ( !haveKeyboardFocus ) {\n        this.canvas.focus();\n    }\n    if(this.viewport.flipped){\n        event.position.x = this.viewport.getContainerSize().x - event.position.x;\n    }\n\n    var canvasClickEventArgs = {\n        tracker: event.eventSource,\n        position: event.position,\n        quick: event.quick,\n        shift: event.shift,\n        originalEvent: event.originalEvent,\n        originalTarget: event.originalTarget,\n        preventDefaultAction: false\n    };\n\n    /**\n     * Raised when a mouse press/release or touch/remove occurs on the {@link OpenSeadragon.Viewer#canvas} element.\n     *\n     * @event canvas-click\n     * @memberof OpenSeadragon.Viewer\n     * @type {object}\n     * @property {OpenSeadragon.Viewer} eventSource - A reference to the Viewer which raised this event.\n     * @property {OpenSeadragon.MouseTracker} tracker - A reference to the MouseTracker which originated this event.\n     * @property {OpenSeadragon.Point} position - The position of the event relative to the tracked element.\n     * @property {Boolean} quick - True only if the clickDistThreshold and clickTimeThreshold are both passed. Useful for differentiating between clicks and drags.\n     * @property {Boolean} shift - True if the shift key was pressed during this event.\n     * @property {Object} originalEvent - The original DOM event.\n     * @property {Element} originalTarget - The DOM element clicked on.\n     * @property {Boolean} preventDefaultAction - Set to true to prevent default click to zoom behaviour. Default: false.\n     * @property {?Object} userData - Arbitrary subscriber-defined object.\n     */\n    this.raiseEvent( 'canvas-click', canvasClickEventArgs);\n\n    if ( !canvasClickEventArgs.preventDefaultAction && this.viewport && event.quick ) {\n        gestureSettings = this.gestureSettingsByDeviceType( event.pointerType );\n        if ( gestureSettings.clickToZoom ) {\n            this.viewport.zoomBy(\n                event.shift ? 1.0 / this.zoomPerClick : this.zoomPerClick,\n                gestureSettings.zoomToRefPoint ? this.viewport.pointFromPixel( event.position, true ) : null\n            );\n            this.viewport.applyConstraints();\n        }\n    }\n}\n\nfunction onCanvasDblClick( event ) {\n    var gestureSettings;\n\n    var canvasDblClickEventArgs = {\n        tracker: event.eventSource,\n        position: event.position,\n        shift: event.shift,\n        originalEvent: event.originalEvent,\n        preventDefaultAction: false\n    };\n\n    /**\n     * Raised when a double mouse press/release or touch/remove occurs on the {@link OpenSeadragon.Viewer#canvas} element.\n     *\n     * @event canvas-double-click\n     * @memberof OpenSeadragon.Viewer\n     * @type {object}\n     * @property {OpenSeadragon.Viewer} eventSource - A reference to the Viewer which raised this event.\n     * @property {OpenSeadragon.MouseTracker} tracker - A reference to the MouseTracker which originated this event.\n     * @property {OpenSeadragon.Point} position - The position of the event relative to the tracked element.\n     * @property {Boolean} shift - True if the shift key was pressed during this event.\n     * @property {Object} originalEvent - The original DOM event.\n     * @property {Boolean} preventDefaultAction - Set to true to prevent default double tap to zoom behaviour. Default: false.\n     * @property {?Object} userData - Arbitrary subscriber-defined object.\n     */\n    this.raiseEvent( 'canvas-double-click', canvasDblClickEventArgs);\n\n    if ( !canvasDblClickEventArgs.preventDefaultAction && this.viewport ) {\n        gestureSettings = this.gestureSettingsByDeviceType( event.pointerType );\n        if ( gestureSettings.dblClickToZoom ) {\n            this.viewport.zoomBy(\n                event.shift ? 1.0 / this.zoomPerClick : this.zoomPerClick,\n                gestureSettings.zoomToRefPoint ? this.viewport.pointFromPixel( event.position, true ) : null\n            );\n            this.viewport.applyConstraints();\n        }\n    }\n}\n\nfunction onCanvasDrag( event ) {\n    var gestureSettings;\n\n    var canvasDragEventArgs = {\n        tracker: event.eventSource,\n        pointerType: event.pointerType,\n        position: event.position,\n        delta: event.delta,\n        speed: event.speed,\n        direction: event.direction,\n        shift: event.shift,\n        originalEvent: event.originalEvent,\n        preventDefaultAction: false\n    };\n\n    /**\n     * Raised when a mouse or touch drag operation occurs on the {@link OpenSeadragon.Viewer#canvas} element.\n     *\n     * @event canvas-drag\n     * @memberof OpenSeadragon.Viewer\n     * @type {object}\n     * @property {OpenSeadragon.Viewer} eventSource - A reference to the Viewer which raised this event.\n     * @property {OpenSeadragon.MouseTracker} tracker - A reference to the MouseTracker which originated this event.\n     * @property {String} pointerType - \"mouse\", \"touch\", \"pen\", etc.\n     * @property {OpenSeadragon.Point} position - The position of the event relative to the tracked element.\n     * @property {OpenSeadragon.Point} delta - The x,y components of the difference between start drag and end drag.\n     * @property {Number} speed - Current computed speed, in pixels per second.\n     * @property {Number} direction - Current computed direction, expressed as an angle counterclockwise relative to the positive X axis (-pi to pi, in radians). Only valid if speed > 0.\n     * @property {Boolean} shift - True if the shift key was pressed during this event.\n     * @property {Object} originalEvent - The original DOM event.\n     * @property {Boolean} preventDefaultAction - Set to true to prevent default drag to pan behaviour. Default: false.\n     * @property {?Object} userData - Arbitrary subscriber-defined object.\n     */\n    this.raiseEvent( 'canvas-drag', canvasDragEventArgs);\n\n    gestureSettings = this.gestureSettingsByDeviceType( event.pointerType );\n\n    if ( gestureSettings.dragToPan && !canvasDragEventArgs.preventDefaultAction && this.viewport ) {\n        if( !this.panHorizontal ){\n            event.delta.x = 0;\n        }\n        if( !this.panVertical ){\n            event.delta.y = 0;\n        }\n        if(this.viewport.flipped){\n            event.delta.x = -event.delta.x;\n        }\n\n        if( this.constrainDuringPan ){\n            var delta = this.viewport.deltaPointsFromPixels( event.delta.negate() );\n\n            this.viewport.centerSpringX.target.value += delta.x;\n            this.viewport.centerSpringY.target.value += delta.y;\n\n            var bounds = this.viewport.getBounds();\n            var constrainedBounds = this.viewport.getConstrainedBounds();\n\n            this.viewport.centerSpringX.target.value -= delta.x;\n            this.viewport.centerSpringY.target.value -= delta.y;\n\n            if (bounds.x !== constrainedBounds.x) {\n                event.delta.x = 0;\n            }\n\n            if (bounds.y !== constrainedBounds.y) {\n                event.delta.y = 0;\n            }\n        }\n\n        this.viewport.panBy( this.viewport.deltaPointsFromPixels( event.delta.negate() ), gestureSettings.flickEnabled && !this.constrainDuringPan);\n    }\n}\n\nfunction onCanvasDragEnd( event ) {\n    var canvasDragEndEventArgs = {\n        tracker: event.eventSource,\n        pointerType: event.pointerType,\n        position: event.position,\n        speed: event.speed,\n        direction: event.direction,\n        shift: event.shift,\n        originalEvent: event.originalEvent,\n        preventDefaultAction: false\n    };\n\n    /**\n     * Raised when a mouse or touch drag operation ends on the {@link OpenSeadragon.Viewer#canvas} element.\n     *\n     * @event canvas-drag-end\n     * @memberof OpenSeadragon.Viewer\n     * @type {object}\n     * @property {OpenSeadragon.Viewer} eventSource - A reference to the Viewer which raised this event.\n     * @property {OpenSeadragon.MouseTracker} tracker - A reference to the MouseTracker which originated this event.\n     * @property {String} pointerType - \"mouse\", \"touch\", \"pen\", etc.\n     * @property {OpenSeadragon.Point} position - The position of the event relative to the tracked element.\n     * @property {Number} speed - Speed at the end of a drag gesture, in pixels per second.\n     * @property {Number} direction - Direction at the end of a drag gesture, expressed as an angle counterclockwise relative to the positive X axis (-pi to pi, in radians). Only valid if speed > 0.\n     * @property {Boolean} shift - True if the shift key was pressed during this event.\n     * @property {Object} originalEvent - The original DOM event.\n     * @property {Boolean} preventDefaultAction - Set to true to prevent default drag-end flick behaviour. Default: false.\n     * @property {?Object} userData - Arbitrary subscriber-defined object.\n     */\n     this.raiseEvent('canvas-drag-end', canvasDragEndEventArgs);\n\n    if (!canvasDragEndEventArgs.preventDefaultAction && this.viewport) {\n        var gestureSettings = this.gestureSettingsByDeviceType(event.pointerType);\n        if (gestureSettings.flickEnabled &&\n            event.speed >= gestureSettings.flickMinSpeed) {\n            var amplitudeX = 0;\n            if (this.panHorizontal) {\n                amplitudeX = gestureSettings.flickMomentum * event.speed *\n                    Math.cos(event.direction);\n            }\n            var amplitudeY = 0;\n            if (this.panVertical) {\n                amplitudeY = gestureSettings.flickMomentum * event.speed *\n                    Math.sin(event.direction);\n            }\n            var center = this.viewport.pixelFromPoint(\n                this.viewport.getCenter(true));\n            var target = this.viewport.pointFromPixel(\n                new $.Point(center.x - amplitudeX, center.y - amplitudeY));\n            this.viewport.panTo(target, false);\n        }\n        this.viewport.applyConstraints();\n    }\n}\n\nfunction onCanvasEnter( event ) {\n    /**\n     * Raised when a pointer enters the {@link OpenSeadragon.Viewer#canvas} element.\n     *\n     * @event canvas-enter\n     * @memberof OpenSeadragon.Viewer\n     * @type {object}\n     * @property {OpenSeadragon.Viewer} eventSource - A reference to the Viewer which raised this event.\n     * @property {OpenSeadragon.MouseTracker} tracker - A reference to the MouseTracker which originated this event.\n     * @property {String} pointerType - \"mouse\", \"touch\", \"pen\", etc.\n     * @property {OpenSeadragon.Point} position - The position of the event relative to the tracked element.\n     * @property {Number} buttons - Current buttons pressed. A combination of bit flags 0: none, 1: primary (or touch contact), 2: secondary, 4: aux (often middle), 8: X1 (often back), 16: X2 (often forward), 32: pen eraser.\n     * @property {Number} pointers - Number of pointers (all types) active in the tracked element.\n     * @property {Boolean} insideElementPressed - True if the left mouse button is currently being pressed and was initiated inside the tracked element, otherwise false.\n     * @property {Boolean} buttonDownAny - Was the button down anywhere in the screen during the event. <span style=\"color:red;\">Deprecated. Use buttons instead.</span>\n     * @property {Object} originalEvent - The original DOM event.\n     * @property {?Object} userData - Arbitrary subscriber-defined object.\n     */\n    this.raiseEvent( 'canvas-enter', {\n        tracker: event.eventSource,\n        pointerType: event.pointerType,\n        position: event.position,\n        buttons: event.buttons,\n        pointers: event.pointers,\n        insideElementPressed: event.insideElementPressed,\n        buttonDownAny: event.buttonDownAny,\n        originalEvent: event.originalEvent\n    });\n}\n\nfunction onCanvasLeave( event ) {\n    /**\n     * Raised when a pointer leaves the {@link OpenSeadragon.Viewer#canvas} element.\n     *\n     * @event canvas-exit\n     * @memberof OpenSeadragon.Viewer\n     * @type {object}\n     * @property {OpenSeadragon.Viewer} eventSource - A reference to the Viewer which raised this event.\n     * @property {OpenSeadragon.MouseTracker} tracker - A reference to the MouseTracker which originated this event.\n     * @property {String} pointerType - \"mouse\", \"touch\", \"pen\", etc.\n     * @property {OpenSeadragon.Point} position - The position of the event relative to the tracked element.\n     * @property {Number} buttons - Current buttons pressed. A combination of bit flags 0: none, 1: primary (or touch contact), 2: secondary, 4: aux (often middle), 8: X1 (often back), 16: X2 (often forward), 32: pen eraser.\n     * @property {Number} pointers - Number of pointers (all types) active in the tracked element.\n     * @property {Boolean} insideElementPressed - True if the left mouse button is currently being pressed and was initiated inside the tracked element, otherwise false.\n     * @property {Boolean} buttonDownAny - Was the button down anywhere in the screen during the event. <span style=\"color:red;\">Deprecated. Use buttons instead.</span>\n     * @property {Object} originalEvent - The original DOM event.\n     * @property {?Object} userData - Arbitrary subscriber-defined object.\n     */\n    this.raiseEvent( 'canvas-exit', {\n        tracker: event.eventSource,\n        pointerType: event.pointerType,\n        position: event.position,\n        buttons: event.buttons,\n        pointers: event.pointers,\n        insideElementPressed: event.insideElementPressed,\n        buttonDownAny: event.buttonDownAny,\n        originalEvent: event.originalEvent\n    });\n}\n\nfunction onCanvasPress( event ) {\n    /**\n     * Raised when the primary mouse button is pressed or touch starts on the {@link OpenSeadragon.Viewer#canvas} element.\n     *\n     * @event canvas-press\n     * @memberof OpenSeadragon.Viewer\n     * @type {object}\n     * @property {OpenSeadragon.Viewer} eventSource - A reference to the Viewer which raised this event.\n     * @property {OpenSeadragon.MouseTracker} tracker - A reference to the MouseTracker which originated this event.\n     * @property {String} pointerType - \"mouse\", \"touch\", \"pen\", etc.\n     * @property {OpenSeadragon.Point} position - The position of the event relative to the tracked element.\n     * @property {Boolean} insideElementPressed - True if the left mouse button is currently being pressed and was initiated inside the tracked element, otherwise false.\n     * @property {Boolean} insideElementReleased - True if the cursor still inside the tracked element when the button was released.\n     * @property {Object} originalEvent - The original DOM event.\n     * @property {?Object} userData - Arbitrary subscriber-defined object.\n     */\n    this.raiseEvent( 'canvas-press', {\n        tracker: event.eventSource,\n        pointerType: event.pointerType,\n        position: event.position,\n        insideElementPressed: event.insideElementPressed,\n        insideElementReleased: event.insideElementReleased,\n        originalEvent: event.originalEvent\n    });\n}\n\nfunction onCanvasRelease( event ) {\n    /**\n     * Raised when the primary mouse button is released or touch ends on the {@link OpenSeadragon.Viewer#canvas} element.\n     *\n     * @event canvas-release\n     * @memberof OpenSeadragon.Viewer\n     * @type {object}\n     * @property {OpenSeadragon.Viewer} eventSource - A reference to the Viewer which raised this event.\n     * @property {OpenSeadragon.MouseTracker} tracker - A reference to the MouseTracker which originated this event.\n     * @property {String} pointerType - \"mouse\", \"touch\", \"pen\", etc.\n     * @property {OpenSeadragon.Point} position - The position of the event relative to the tracked element.\n     * @property {Boolean} insideElementPressed - True if the left mouse button is currently being pressed and was initiated inside the tracked element, otherwise false.\n     * @property {Boolean} insideElementReleased - True if the cursor still inside the tracked element when the button was released.\n     * @property {Object} originalEvent - The original DOM event.\n     * @property {?Object} userData - Arbitrary subscriber-defined object.\n     */\n    this.raiseEvent( 'canvas-release', {\n        tracker: event.eventSource,\n        pointerType: event.pointerType,\n        position: event.position,\n        insideElementPressed: event.insideElementPressed,\n        insideElementReleased: event.insideElementReleased,\n        originalEvent: event.originalEvent\n    });\n}\n\nfunction onCanvasNonPrimaryPress( event ) {\n    /**\n     * Raised when any non-primary pointer button is pressed on the {@link OpenSeadragon.Viewer#canvas} element.\n     *\n     * @event canvas-nonprimary-press\n     * @memberof OpenSeadragon.Viewer\n     * @type {object}\n     * @property {OpenSeadragon.Viewer} eventSource - A reference to the Viewer which raised this event.\n     * @property {OpenSeadragon.MouseTracker} tracker - A reference to the MouseTracker which originated this event.\n     * @property {OpenSeadragon.Point} position - The position of the event relative to the tracked element.\n     * @property {String} pointerType - \"mouse\", \"touch\", \"pen\", etc.\n     * @property {Number} button - Button which caused the event.\n     *      -1: none, 0: primary/left, 1: aux/middle, 2: secondary/right, 3: X1/back, 4: X2/forward, 5: pen eraser.\n     * @property {Number} buttons - Current buttons pressed.\n     *      Combination of bit flags 0: none, 1: primary (or touch contact), 2: secondary, 4: aux (often middle), 8: X1 (often back), 16: X2 (often forward), 32: pen eraser.\n     * @property {Object} originalEvent - The original DOM event.\n     * @property {?Object} userData - Arbitrary subscriber-defined object.\n     */\n    this.raiseEvent( 'canvas-nonprimary-press', {\n        tracker: event.eventSource,\n        position: event.position,\n        pointerType: event.pointerType,\n        button: event.button,\n        buttons: event.buttons,\n        originalEvent: event.originalEvent\n    });\n}\n\nfunction onCanvasNonPrimaryRelease( event ) {\n    /**\n     * Raised when any non-primary pointer button is released on the {@link OpenSeadragon.Viewer#canvas} element.\n     *\n     * @event canvas-nonprimary-release\n     * @memberof OpenSeadragon.Viewer\n     * @type {object}\n     * @property {OpenSeadragon.Viewer} eventSource - A reference to the Viewer which raised this event.\n     * @property {OpenSeadragon.MouseTracker} tracker - A reference to the MouseTracker which originated this event.\n     * @property {OpenSeadragon.Point} position - The position of the event relative to the tracked element.\n     * @property {String} pointerType - \"mouse\", \"touch\", \"pen\", etc.\n     * @property {Number} button - Button which caused the event.\n     *      -1: none, 0: primary/left, 1: aux/middle, 2: secondary/right, 3: X1/back, 4: X2/forward, 5: pen eraser.\n     * @property {Number} buttons - Current buttons pressed.\n     *      Combination of bit flags 0: none, 1: primary (or touch contact), 2: secondary, 4: aux (often middle), 8: X1 (often back), 16: X2 (often forward), 32: pen eraser.\n     * @property {Object} originalEvent - The original DOM event.\n     * @property {?Object} userData - Arbitrary subscriber-defined object.\n     */\n    this.raiseEvent( 'canvas-nonprimary-release', {\n        tracker: event.eventSource,\n        position: event.position,\n        pointerType: event.pointerType,\n        button: event.button,\n        buttons: event.buttons,\n        originalEvent: event.originalEvent\n    });\n}\n\nfunction onCanvasPinch( event ) {\n    var gestureSettings,\n        centerPt,\n        lastCenterPt,\n        panByPt;\n\n    var canvasPinchEventArgs = {\n        tracker: event.eventSource,\n        pointerType: event.pointerType,\n        gesturePoints: event.gesturePoints,\n        lastCenter: event.lastCenter,\n        center: event.center,\n        lastDistance: event.lastDistance,\n        distance: event.distance,\n        shift: event.shift,\n        originalEvent: event.originalEvent,\n        preventDefaultPanAction: false,\n        preventDefaultZoomAction: false,\n        preventDefaultRotateAction: false\n    };\n\n    /**\n     * Raised when a pinch event occurs on the {@link OpenSeadragon.Viewer#canvas} element.\n     *\n     * @event canvas-pinch\n     * @memberof OpenSeadragon.Viewer\n     * @type {object}\n     * @property {OpenSeadragon.Viewer} eventSource - A reference to the Viewer which raised this event.\n     * @property {OpenSeadragon.MouseTracker} tracker - A reference to the MouseTracker which originated this event.\n     * @property {String} pointerType - \"mouse\", \"touch\", \"pen\", etc.\n     * @property {Array.<OpenSeadragon.MouseTracker.GesturePoint>} gesturePoints - Gesture points associated with the gesture. Velocity data can be found here.\n     * @property {OpenSeadragon.Point} lastCenter - The previous center point of the two pinch contact points relative to the tracked element.\n     * @property {OpenSeadragon.Point} center - The center point of the two pinch contact points relative to the tracked element.\n     * @property {Number} lastDistance - The previous distance between the two pinch contact points in CSS pixels.\n     * @property {Number} distance - The distance between the two pinch contact points in CSS pixels.\n     * @property {Boolean} shift - True if the shift key was pressed during this event.\n     * @property {Object} originalEvent - The original DOM event.\n     * @property {Boolean} preventDefaultPanAction - Set to true to prevent default pinch to pan behaviour. Default: false.\n     * @property {Boolean} preventDefaultZoomAction - Set to true to prevent default pinch to zoom behaviour. Default: false.\n     * @property {Boolean} preventDefaultRotateAction - Set to true to prevent default pinch to rotate behaviour. Default: false.\n     * @property {?Object} userData - Arbitrary subscriber-defined object.\n     */\n     this.raiseEvent('canvas-pinch', canvasPinchEventArgs);\n\n    if ( this.viewport ) {\n        gestureSettings = this.gestureSettingsByDeviceType( event.pointerType );\n        if ( gestureSettings.pinchToZoom &&\n                    (!canvasPinchEventArgs.preventDefaultPanAction || !canvasPinchEventArgs.preventDefaultZoomAction) ) {\n            centerPt = this.viewport.pointFromPixel( event.center, true );\n            if ( gestureSettings.zoomToRefPoint && !canvasPinchEventArgs.preventDefaultPanAction ) {\n                lastCenterPt = this.viewport.pointFromPixel( event.lastCenter, true );\n                panByPt = lastCenterPt.minus( centerPt );\n                if( !this.panHorizontal ) {\n                    panByPt.x = 0;\n                }\n                if( !this.panVertical ) {\n                    panByPt.y = 0;\n                }\n                this.viewport.panBy(panByPt, true);\n            }\n            if ( !canvasPinchEventArgs.preventDefaultZoomAction ) {\n                this.viewport.zoomBy( event.distance / event.lastDistance, centerPt, true );\n            }\n            this.viewport.applyConstraints();\n        }\n        if ( gestureSettings.pinchRotate && !canvasPinchEventArgs.preventDefaultRotateAction ) {\n            // Pinch rotate\n            var angle1 = Math.atan2(event.gesturePoints[0].currentPos.y - event.gesturePoints[1].currentPos.y,\n                event.gesturePoints[0].currentPos.x - event.gesturePoints[1].currentPos.x);\n            var angle2 = Math.atan2(event.gesturePoints[0].lastPos.y - event.gesturePoints[1].lastPos.y,\n                event.gesturePoints[0].lastPos.x - event.gesturePoints[1].lastPos.x);\n            this.viewport.setRotation(this.viewport.getRotation() + ((angle1 - angle2) * (180 / Math.PI)));\n        }\n    }\n}\n\nfunction onCanvasScroll( event ) {\n    var canvasScrollEventArgs,\n        gestureSettings,\n        factor,\n        thisScrollTime,\n        deltaScrollTime;\n\n    /* Certain scroll devices fire the scroll event way too fast so we are injecting a simple adjustment to keep things\n     * partially normalized. If we have already fired an event within the last 'minScrollDelta' milliseconds we skip\n     * this one and wait for the next event. */\n    thisScrollTime = $.now();\n    deltaScrollTime = thisScrollTime - this._lastScrollTime;\n    if (deltaScrollTime > this.minScrollDeltaTime) {\n        this._lastScrollTime = thisScrollTime;\n\n        canvasScrollEventArgs = {\n            tracker: event.eventSource,\n            position: event.position,\n            scroll: event.scroll,\n            shift: event.shift,\n            originalEvent: event.originalEvent,\n            preventDefaultAction: false,\n            preventDefault: true\n        };\n\n        /**\n         * Raised when a scroll event occurs on the {@link OpenSeadragon.Viewer#canvas} element (mouse wheel).\n         *\n         * @event canvas-scroll\n         * @memberof OpenSeadragon.Viewer\n         * @type {object}\n         * @property {OpenSeadragon.Viewer} eventSource - A reference to the Viewer which raised this event.\n         * @property {OpenSeadragon.MouseTracker} tracker - A reference to the MouseTracker which originated this event.\n         * @property {OpenSeadragon.Point} position - The position of the event relative to the tracked element.\n         * @property {Number} scroll - The scroll delta for the event.\n         * @property {Boolean} shift - True if the shift key was pressed during this event.\n         * @property {Object} originalEvent - The original DOM event.\n         * @property {Boolean} preventDefaultAction - Set to true to prevent default scroll to zoom behaviour. Default: false.\n         * @property {Boolean} preventDefault - Set to true to prevent the default user-agent's handling of the wheel event. Default: true.\n         * @property {?Object} userData - Arbitrary subscriber-defined object.\n         */\n         this.raiseEvent('canvas-scroll', canvasScrollEventArgs );\n\n        if ( !canvasScrollEventArgs.preventDefaultAction && this.viewport ) {\n            if(this.viewport.flipped){\n                event.position.x = this.viewport.getContainerSize().x - event.position.x;\n            }\n\n            gestureSettings = this.gestureSettingsByDeviceType( event.pointerType );\n            if ( gestureSettings.scrollToZoom ) {\n                factor = Math.pow( this.zoomPerScroll, event.scroll );\n                this.viewport.zoomBy(\n                    factor,\n                    gestureSettings.zoomToRefPoint ? this.viewport.pointFromPixel( event.position, true ) : null\n                );\n                this.viewport.applyConstraints();\n            }\n        }\n\n        event.preventDefault = canvasScrollEventArgs.preventDefault;\n    } else {\n        event.preventDefault = true;\n    }\n}\n\nfunction onContainerEnter( event ) {\n    THIS[ this.hash ].mouseInside = true;\n    abortControlsAutoHide( this );\n    /**\n     * Raised when the cursor enters the {@link OpenSeadragon.Viewer#container} element.\n     *\n     * @event container-enter\n     * @memberof OpenSeadragon.Viewer\n     * @type {object}\n     * @property {OpenSeadragon.Viewer} eventSource - A reference to the Viewer which raised this event.\n     * @property {OpenSeadragon.MouseTracker} tracker - A reference to the MouseTracker which originated this event.\n     * @property {String} pointerType - \"mouse\", \"touch\", \"pen\", etc.\n     * @property {OpenSeadragon.Point} position - The position of the event relative to the tracked element.\n     * @property {Number} buttons - Current buttons pressed. A combination of bit flags 0: none, 1: primary (or touch contact), 2: secondary, 4: aux (often middle), 8: X1 (often back), 16: X2 (often forward), 32: pen eraser.\n     * @property {Number} pointers - Number of pointers (all types) active in the tracked element.\n     * @property {Boolean} insideElementPressed - True if the left mouse button is currently being pressed and was initiated inside the tracked element, otherwise false.\n     * @property {Boolean} buttonDownAny - Was the button down anywhere in the screen during the event. <span style=\"color:red;\">Deprecated. Use buttons instead.</span>\n     * @property {Object} originalEvent - The original DOM event.\n     * @property {?Object} userData - Arbitrary subscriber-defined object.\n     */\n    this.raiseEvent( 'container-enter', {\n        tracker: event.eventSource,\n        pointerType: event.pointerType,\n        position: event.position,\n        buttons: event.buttons,\n        pointers: event.pointers,\n        insideElementPressed: event.insideElementPressed,\n        buttonDownAny: event.buttonDownAny,\n        originalEvent: event.originalEvent\n    });\n}\n\nfunction onContainerLeave( event ) {\n    if ( event.pointers < 1 ) {\n        THIS[ this.hash ].mouseInside = false;\n        if ( !THIS[ this.hash ].animating ) {\n            beginControlsAutoHide( this );\n        }\n    }\n    /**\n     * Raised when the cursor leaves the {@link OpenSeadragon.Viewer#container} element.\n     *\n     * @event container-exit\n     * @memberof OpenSeadragon.Viewer\n     * @type {object}\n     * @property {OpenSeadragon.Viewer} eventSource - A reference to the Viewer which raised this event.\n     * @property {OpenSeadragon.MouseTracker} tracker - A reference to the MouseTracker which originated this event.\n     * @property {String} pointerType - \"mouse\", \"touch\", \"pen\", etc.\n     * @property {OpenSeadragon.Point} position - The position of the event relative to the tracked element.\n     * @property {Number} buttons - Current buttons pressed. A combination of bit flags 0: none, 1: primary (or touch contact), 2: secondary, 4: aux (often middle), 8: X1 (often back), 16: X2 (often forward), 32: pen eraser.\n     * @property {Number} pointers - Number of pointers (all types) active in the tracked element.\n     * @property {Boolean} insideElementPressed - True if the left mouse button is currently being pressed and was initiated inside the tracked element, otherwise false.\n     * @property {Boolean} buttonDownAny - Was the button down anywhere in the screen during the event. <span style=\"color:red;\">Deprecated. Use buttons instead.</span>\n     * @property {Object} originalEvent - The original DOM event.\n     * @property {?Object} userData - Arbitrary subscriber-defined object.\n     */\n    this.raiseEvent( 'container-exit', {\n        tracker: event.eventSource,\n        pointerType: event.pointerType,\n        position: event.position,\n        buttons: event.buttons,\n        pointers: event.pointers,\n        insideElementPressed: event.insideElementPressed,\n        buttonDownAny: event.buttonDownAny,\n        originalEvent: event.originalEvent\n    });\n}\n\n\n///////////////////////////////////////////////////////////////////////////////\n// Page update routines ( aka Views - for future reference )\n///////////////////////////////////////////////////////////////////////////////\n\nfunction updateMulti( viewer ) {\n    updateOnce( viewer );\n\n    // Request the next frame, unless we've been closed\n    if ( viewer.isOpen() ) {\n        viewer._updateRequestId = scheduleUpdate( viewer, updateMulti );\n    } else {\n        viewer._updateRequestId = false;\n    }\n}\n\nfunction updateOnce( viewer ) {\n\n    //viewer.profiler.beginUpdate();\n\n    if (viewer._opening || !THIS[viewer.hash]) {\n        return;\n    }\n\n    if (viewer.autoResize) {\n        var containerSize = _getSafeElemSize(viewer.container);\n        var prevContainerSize = THIS[viewer.hash].prevContainerSize;\n        if (!containerSize.equals(prevContainerSize)) {\n            var viewport = viewer.viewport;\n            if (viewer.preserveImageSizeOnResize) {\n                var resizeRatio = prevContainerSize.x / containerSize.x;\n                var zoom = viewport.getZoom() * resizeRatio;\n                var center = viewport.getCenter();\n                viewport.resize(containerSize, false);\n                viewport.zoomTo(zoom, null, true);\n                viewport.panTo(center, true);\n            } else {\n                // maintain image position\n                var oldBounds = viewport.getBounds();\n                viewport.resize(containerSize, true);\n                viewport.fitBoundsWithConstraints(oldBounds, true);\n            }\n            THIS[viewer.hash].prevContainerSize = containerSize;\n            THIS[viewer.hash].forceRedraw = true;\n        }\n    }\n\n    var viewportChange = viewer.viewport.update();\n    var animated = viewer.world.update() || viewportChange;\n\n    if (viewportChange) {\n        /**\n         * Raised when any spring animation update occurs (zoom, pan, etc.),\n         * before the viewer has drawn the new location.\n         *\n         * @event viewport-change\n         * @memberof OpenSeadragon.Viewer\n         * @type {object}\n         * @property {OpenSeadragon.Viewer} eventSource - A reference to the Viewer which raised this event.\n         * @property {?Object} userData - Arbitrary subscriber-defined object.\n         */\n        viewer.raiseEvent('viewport-change');\n    }\n\n    if( viewer.referenceStrip ){\n        animated = viewer.referenceStrip.update( viewer.viewport ) || animated;\n    }\n\n    var currentAnimating = THIS[ viewer.hash ].animating;\n\n    if ( !currentAnimating && animated ) {\n        /**\n         * Raised when any spring animation starts (zoom, pan, etc.).\n         *\n         * @event animation-start\n         * @memberof OpenSeadragon.Viewer\n         * @type {object}\n         * @property {OpenSeadragon.Viewer} eventSource - A reference to the Viewer which raised this event.\n         * @property {?Object} userData - Arbitrary subscriber-defined object.\n         */\n        viewer.raiseEvent( \"animation-start\" );\n        abortControlsAutoHide( viewer );\n    }\n\n    var isAnimationFinished = currentAnimating && !animated;\n\n    if ( isAnimationFinished ) {\n        THIS[ viewer.hash ].animating = false;\n    }\n\n    if ( animated || isAnimationFinished || THIS[ viewer.hash ].forceRedraw || viewer.world.needsDraw() ) {\n        drawWorld( viewer );\n        viewer._drawOverlays();\n        if( viewer.navigator ){\n          viewer.navigator.update( viewer.viewport );\n        }\n\n        THIS[ viewer.hash ].forceRedraw = false;\n\n        if (animated) {\n            /**\n             * Raised when any spring animation update occurs (zoom, pan, etc.),\n             * after the viewer has drawn the new location.\n             *\n             * @event animation\n             * @memberof OpenSeadragon.Viewer\n             * @type {object}\n             * @property {OpenSeadragon.Viewer} eventSource - A reference to the Viewer which raised this event.\n             * @property {?Object} userData - Arbitrary subscriber-defined object.\n             */\n            viewer.raiseEvent( \"animation\" );\n        }\n    }\n\n    if ( isAnimationFinished ) {\n        /**\n         * Raised when any spring animation ends (zoom, pan, etc.).\n         *\n         * @event animation-finish\n         * @memberof OpenSeadragon.Viewer\n         * @type {object}\n         * @property {OpenSeadragon.Viewer} eventSource - A reference to the Viewer which raised this event.\n         * @property {?Object} userData - Arbitrary subscriber-defined object.\n         */\n        viewer.raiseEvent( \"animation-finish\" );\n\n        if ( !THIS[ viewer.hash ].mouseInside ) {\n            beginControlsAutoHide( viewer );\n        }\n    }\n\n    THIS[ viewer.hash ].animating = animated;\n\n    //viewer.profiler.endUpdate();\n}\n\nfunction drawWorld( viewer ) {\n    viewer.imageLoader.clear();\n    viewer.drawer.clear();\n    viewer.world.draw();\n\n    /**\n     * <em>- Needs documentation -</em>\n     *\n     * @event update-viewport\n     * @memberof OpenSeadragon.Viewer\n     * @type {object}\n     * @property {OpenSeadragon.Viewer} eventSource - A reference to the Viewer which raised the event.\n     * @property {?Object} userData - Arbitrary subscriber-defined object.\n     */\n    viewer.raiseEvent( 'update-viewport', {} );\n}\n\n///////////////////////////////////////////////////////////////////////////////\n// Navigation Controls\n///////////////////////////////////////////////////////////////////////////////\nfunction resolveUrl( prefix, url ) {\n    return prefix ? prefix + url : url;\n}\n\n\n\nfunction beginZoomingIn() {\n    THIS[ this.hash ].lastZoomTime = $.now();\n    THIS[ this.hash ].zoomFactor = this.zoomPerSecond;\n    THIS[ this.hash ].zooming = true;\n    scheduleZoom( this );\n}\n\n\nfunction beginZoomingOut() {\n    THIS[ this.hash ].lastZoomTime = $.now();\n    THIS[ this.hash ].zoomFactor = 1.0 / this.zoomPerSecond;\n    THIS[ this.hash ].zooming = true;\n    scheduleZoom( this );\n}\n\n\nfunction endZooming() {\n    THIS[ this.hash ].zooming = false;\n}\n\n\nfunction scheduleZoom( viewer ) {\n    $.requestAnimationFrame( $.delegate( viewer, doZoom ) );\n}\n\n\nfunction doZoom() {\n    var currentTime,\n        deltaTime,\n        adjustedFactor;\n\n    if ( THIS[ this.hash ].zooming && this.viewport) {\n        currentTime     = $.now();\n        deltaTime       = currentTime - THIS[ this.hash ].lastZoomTime;\n        adjustedFactor  = Math.pow( THIS[ this.hash ].zoomFactor, deltaTime / 1000 );\n\n        this.viewport.zoomBy( adjustedFactor );\n        this.viewport.applyConstraints();\n        THIS[ this.hash ].lastZoomTime = currentTime;\n        scheduleZoom( this );\n    }\n}\n\n\nfunction doSingleZoomIn() {\n    if ( this.viewport ) {\n        THIS[ this.hash ].zooming = false;\n        this.viewport.zoomBy(\n            this.zoomPerClick / 1.0\n        );\n        this.viewport.applyConstraints();\n    }\n}\n\n\nfunction doSingleZoomOut() {\n    if ( this.viewport ) {\n        THIS[ this.hash ].zooming = false;\n        this.viewport.zoomBy(\n            1.0 / this.zoomPerClick\n        );\n        this.viewport.applyConstraints();\n    }\n}\n\n\nfunction lightUp() {\n    if (this.buttonGroup) {\n        this.buttonGroup.emulateEnter();\n        this.buttonGroup.emulateLeave();\n    }\n}\n\n\nfunction onHome() {\n    if ( this.viewport ) {\n        this.viewport.goHome();\n    }\n}\n\n\nfunction onFullScreen() {\n    if ( this.isFullPage() && !$.isFullScreen() ) {\n        // Is fullPage but not fullScreen\n        this.setFullPage( false );\n    } else {\n        this.setFullScreen( !this.isFullPage() );\n    }\n    // correct for no mouseout event on change\n    if ( this.buttonGroup ) {\n        this.buttonGroup.emulateLeave();\n    }\n    this.fullPageButton.element.focus();\n    if ( this.viewport ) {\n        this.viewport.applyConstraints();\n    }\n}\n\nfunction onRotateLeft() {\n    if ( this.viewport ) {\n        var currRotation = this.viewport.getRotation();\n\n        if ( this.viewport.flipped ){\n          currRotation = $.positiveModulo(currRotation + this.rotationIncrement, 360);\n        } else {\n          currRotation = $.positiveModulo(currRotation - this.rotationIncrement, 360);\n        }\n        this.viewport.setRotation(currRotation);\n    }\n}\n\nfunction onRotateRight() {\n    if ( this.viewport ) {\n        var currRotation = this.viewport.getRotation();\n\n        if ( this.viewport.flipped ){\n          currRotation = $.positiveModulo(currRotation - this.rotationIncrement, 360);\n        } else {\n          currRotation = $.positiveModulo(currRotation + this.rotationIncrement, 360);\n        }\n        this.viewport.setRotation(currRotation);\n    }\n}\n/**\n * Note: When pressed flip control button\n */\nfunction onFlip() {\n   this.viewport.toggleFlip();\n}\n\n}( OpenSeadragon ));\n\n/*\n * OpenSeadragon - Navigator\n *\n * Copyright (C) 2009 CodePlex Foundation\n * Copyright (C) 2010-2013 OpenSeadragon contributors\n *\n * Redistribution and use in source and binary forms, with or without\n * modification, are permitted provided that the following conditions are\n * met:\n *\n * - Redistributions of source code must retain the above copyright notice,\n *   this list of conditions and the following disclaimer.\n *\n * - Redistributions in binary form must reproduce the above copyright\n *   notice, this list of conditions and the following disclaimer in the\n *   documentation and/or other materials provided with the distribution.\n *\n * - Neither the name of CodePlex Foundation nor the names of its\n *   contributors may be used to endorse or promote products derived from\n *   this software without specific prior written permission.\n *\n * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS\n * \"AS IS\" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT\n * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR\n * A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT\n * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,\n * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED\n * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR\n * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF\n * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING\n * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS\n * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.\n */\n\n(function( $ ){\n\n/**\n * @class Navigator\n * @classdesc The Navigator provides a small view of the current image as fixed\n * while representing the viewport as a moving box serving as a frame\n * of reference in the larger viewport as to which portion of the image\n * is currently being examined.  The navigator's viewport can be interacted\n * with using the keyboard or the mouse.\n *\n * @memberof OpenSeadragon\n * @extends OpenSeadragon.Viewer\n * @extends OpenSeadragon.EventSource\n * @param {Object} options\n */\n$.Navigator = function( options ){\n\n    var viewer      = options.viewer,\n        _this = this,\n        viewerSize,\n        navigatorSize;\n\n    //We may need to create a new element and id if they did not\n    //provide the id for the existing element\n    if( !options.id ){\n        options.id              = 'navigator-' + $.now();\n        this.element            = $.makeNeutralElement( \"div\" );\n        options.controlOptions  = {\n            anchor:           $.ControlAnchor.TOP_RIGHT,\n            attachToViewer:   true,\n            autoFade:         options.autoFade\n        };\n\n        if( options.position ){\n            if( 'BOTTOM_RIGHT' === options.position ){\n               options.controlOptions.anchor = $.ControlAnchor.BOTTOM_RIGHT;\n            } else if( 'BOTTOM_LEFT' === options.position ){\n               options.controlOptions.anchor = $.ControlAnchor.BOTTOM_LEFT;\n            } else if( 'TOP_RIGHT' === options.position ){\n               options.controlOptions.anchor = $.ControlAnchor.TOP_RIGHT;\n            } else if( 'TOP_LEFT' === options.position ){\n               options.controlOptions.anchor = $.ControlAnchor.TOP_LEFT;\n            } else if( 'ABSOLUTE' === options.position ){\n               options.controlOptions.anchor = $.ControlAnchor.ABSOLUTE;\n               options.controlOptions.top = options.top;\n               options.controlOptions.left = options.left;\n               options.controlOptions.height = options.height;\n               options.controlOptions.width = options.width;\n            }\n        }\n\n    } else {\n        this.element            = document.getElementById( options.id );\n        options.controlOptions  = {\n            anchor:           $.ControlAnchor.NONE,\n            attachToViewer:   false,\n            autoFade:         false\n        };\n    }\n    this.element.id         = options.id;\n    this.element.className  += ' navigator';\n\n    options = $.extend( true, {\n        sizeRatio:     $.DEFAULT_SETTINGS.navigatorSizeRatio\n    }, options, {\n        element:                this.element,\n        tabIndex:               -1, // No keyboard navigation, omit from tab order\n        //These need to be overridden to prevent recursion since\n        //the navigator is a viewer and a viewer has a navigator\n        showNavigator:          false,\n        mouseNavEnabled:        false,\n        showNavigationControl:  false,\n        showSequenceControl:    false,\n        immediateRender:        true,\n        blendTime:              0,\n        animationTime:          0,\n        autoResize:             options.autoResize,\n        // prevent resizing the navigator from adding unwanted space around the image\n        minZoomImageRatio:      1.0,\n        background:             options.background,\n        opacity:                options.opacity,\n        borderColor:            options.borderColor,\n        displayRegionColor:     options.displayRegionColor\n    });\n\n    options.minPixelRatio = this.minPixelRatio = viewer.minPixelRatio;\n\n    $.setElementTouchActionNone( this.element );\n\n    this.borderWidth = 2;\n    //At some browser magnification levels the display regions lines up correctly, but at some there appears to\n    //be a one pixel gap.\n    this.fudge = new $.Point(1, 1);\n    this.totalBorderWidths = new $.Point(this.borderWidth * 2, this.borderWidth * 2).minus(this.fudge);\n\n\n    if ( options.controlOptions.anchor !== $.ControlAnchor.NONE ) {\n        (function( style, borderWidth ){\n            style.margin        = '0px';\n            style.border        = borderWidth + 'px solid ' + options.borderColor;\n            style.padding       = '0px';\n            style.background    = options.background;\n            style.opacity       = options.opacity;\n            style.overflow      = 'hidden';\n        }( this.element.style, this.borderWidth));\n    }\n\n    this.displayRegion           = $.makeNeutralElement( \"div\" );\n    this.displayRegion.id        = this.element.id + '-displayregion';\n    this.displayRegion.className = 'displayregion';\n\n    (function( style, borderWidth ){\n        style.position      = 'relative';\n        style.top           = '0px';\n        style.left          = '0px';\n        style.fontSize      = '0px';\n        style.overflow      = 'hidden';\n        style.border        = borderWidth + 'px solid ' + options.displayRegionColor;\n        style.margin        = '0px';\n        style.padding       = '0px';\n        //TODO: IE doesn't like this property being set\n        //try{ style.outline  = '2px auto #909'; }catch(e){/*ignore*/}\n\n        style.background    = 'transparent';\n\n        // We use square bracket notation on the statement below, because float is a keyword.\n        // This is important for the Google Closure compiler, if nothing else.\n        /*jshint sub:true */\n        style['float']      = 'left'; //Webkit\n\n        style.cssFloat      = 'left'; //Firefox\n        style.styleFloat    = 'left'; //IE\n        style.zIndex        = 999999999;\n        style.cursor        = 'default';\n    }( this.displayRegion.style, this.borderWidth ));\n    $.setElementPointerEventsNone( this.displayRegion );\n    $.setElementTouchActionNone( this.displayRegion );\n\n    this.displayRegionContainer = $.makeNeutralElement(\"div\");\n    this.displayRegionContainer.id = this.element.id + '-displayregioncontainer';\n    this.displayRegionContainer.className = \"displayregioncontainer\";\n    this.displayRegionContainer.style.width = \"100%\";\n    this.displayRegionContainer.style.height = \"100%\";\n    $.setElementPointerEventsNone( this.displayRegionContainer );\n    $.setElementTouchActionNone( this.displayRegionContainer );\n\n    viewer.addControl(\n        this.element,\n        options.controlOptions\n    );\n\n    this._resizeWithViewer = options.controlOptions.anchor !== $.ControlAnchor.ABSOLUTE &&\n        options.controlOptions.anchor !== $.ControlAnchor.NONE;\n\n    if (options.width && options.height) {\n        this.setWidth(options.width);\n        this.setHeight(options.height);\n    } else if ( this._resizeWithViewer ) {\n        viewerSize = $.getElementSize( viewer.element );\n        this.element.style.height = Math.round( viewerSize.y * options.sizeRatio ) + 'px';\n        this.element.style.width  = Math.round( viewerSize.x * options.sizeRatio ) + 'px';\n        this.oldViewerSize = viewerSize;\n        navigatorSize = $.getElementSize( this.element );\n        this.elementArea = navigatorSize.x * navigatorSize.y;\n    }\n\n    this.oldContainerSize = new $.Point( 0, 0 );\n\n    $.Viewer.apply( this, [ options ] );\n\n    this.displayRegionContainer.appendChild(this.displayRegion);\n    this.element.getElementsByTagName('div')[0].appendChild(this.displayRegionContainer);\n\n    function rotate(degrees) {\n        _setTransformRotate(_this.displayRegionContainer, degrees);\n        _setTransformRotate(_this.displayRegion, -degrees);\n        _this.viewport.setRotation(degrees);\n    }\n    if (options.navigatorRotate) {\n        var degrees = options.viewer.viewport ?\n            options.viewer.viewport.getRotation() :\n            options.viewer.degrees || 0;\n\n        rotate(degrees);\n        options.viewer.addHandler(\"rotate\", function (args) {\n            rotate(args.degrees);\n        });\n    }\n\n\n    // Remove the base class' (Viewer's) innerTracker and replace it with our own\n    this.innerTracker.destroy();\n    this.innerTracker = new $.MouseTracker({\n        userData:        'Navigator.innerTracker',\n        element:         this.element, //this.canvas,\n        dragHandler:     $.delegate( this, onCanvasDrag ),\n        clickHandler:    $.delegate( this, onCanvasClick ),\n        releaseHandler:  $.delegate( this, onCanvasRelease ),\n        scrollHandler:   $.delegate( this, onCanvasScroll ),\n        preProcessEventHandler: function (eventInfo) {\n            if (eventInfo.eventType === 'wheel') {\n                //don't scroll the page up and down if the user is scrolling\n                //in the navigator\n                eventInfo.preventDefault = true;\n            }\n        }\n    });\n    this.outerTracker.userData = 'Navigator.outerTracker';\n\n    // this.innerTracker is attached to this.element...we need to allow pointer\n    //   events to pass through this Viewer's canvas/container elements so implicit\n    //   pointer capture works on touch devices\n    //TODO an alternative is to attach the new MouseTracker to this.canvas...not\n    //   sure why it isn't already (see MouseTracker constructor call above)\n    $.setElementPointerEventsNone( this.canvas );\n    $.setElementPointerEventsNone( this.container );\n\n    this.addHandler(\"reset-size\", function() {\n        if (_this.viewport) {\n            _this.viewport.goHome(true);\n        }\n    });\n\n    viewer.world.addHandler(\"item-index-change\", function(event) {\n        window.setTimeout(function(){\n            var item = _this.world.getItemAt(event.previousIndex);\n            _this.world.setItemIndex(item, event.newIndex);\n        }, 1);\n    });\n\n    viewer.world.addHandler(\"remove-item\", function(event) {\n        var theirItem = event.item;\n        var myItem = _this._getMatchingItem(theirItem);\n        if (myItem) {\n            _this.world.removeItem(myItem);\n        }\n    });\n\n    this.update(viewer.viewport);\n};\n\n$.extend( $.Navigator.prototype, $.EventSource.prototype, $.Viewer.prototype, /** @lends OpenSeadragon.Navigator.prototype */{\n\n    /**\n     * Used to notify the navigator when its size has changed.\n     * Especially useful when {@link OpenSeadragon.Options}.navigatorAutoResize is set to false and the navigator is resizable.\n     * @function\n     */\n    updateSize: function () {\n        if ( this.viewport ) {\n            var containerSize = new $.Point(\n                    (this.container.clientWidth === 0 ? 1 : this.container.clientWidth),\n                    (this.container.clientHeight === 0 ? 1 : this.container.clientHeight)\n                );\n\n            if ( !containerSize.equals( this.oldContainerSize ) ) {\n                this.viewport.resize( containerSize, true );\n                this.viewport.goHome(true);\n                this.oldContainerSize = containerSize;\n                this.drawer.clear();\n                this.world.draw();\n            }\n        }\n    },\n\n    /**\n     * Explicitly sets the width of the navigator, in web coordinates. Disables automatic resizing.\n     * @param {Number|String} width - the new width, either a number of pixels or a CSS string, such as \"100%\"\n     */\n    setWidth: function(width) {\n        this.width = width;\n        this.element.style.width = typeof (width) === \"number\" ? (width + 'px') : width;\n        this._resizeWithViewer = false;\n    },\n\n    /**\n     * Explicitly sets the height of the navigator, in web coordinates. Disables automatic resizing.\n     * @param {Number|String} height - the new height, either a number of pixels or a CSS string, such as \"100%\"\n     */\n    setHeight: function(height) {\n        this.height = height;\n        this.element.style.height = typeof (height) === \"number\" ? (height + 'px') : height;\n        this._resizeWithViewer = false;\n    },\n\n    /**\n      * Flip navigator element\n      * @param {Boolean} state - Flip state to set.\n      */\n    setFlip: function(state) {\n      this.viewport.setFlip(state);\n\n      this.setDisplayTransform(this.viewer.viewport.getFlip() ? \"scale(-1,1)\" : \"scale(1,1)\");\n      return this;\n    },\n\n    setDisplayTransform: function(rule) {\n      setElementTransform(this.displayRegion, rule);\n      setElementTransform(this.canvas, rule);\n      setElementTransform(this.element, rule);\n    },\n\n    /**\n     * Used to update the navigator minimap's viewport rectangle when a change in the viewer's viewport occurs.\n     * @function\n     * @param {OpenSeadragon.Viewport} The viewport this navigator is tracking.\n     */\n    update: function( viewport ) {\n\n        var viewerSize,\n            newWidth,\n            newHeight,\n            bounds,\n            topleft,\n            bottomright;\n\n        viewerSize = $.getElementSize( this.viewer.element );\n        if ( this._resizeWithViewer && viewerSize.x && viewerSize.y && !viewerSize.equals( this.oldViewerSize ) ) {\n            this.oldViewerSize = viewerSize;\n\n            if ( this.maintainSizeRatio || !this.elementArea) {\n                newWidth  = viewerSize.x * this.sizeRatio;\n                newHeight = viewerSize.y * this.sizeRatio;\n            } else {\n                newWidth = Math.sqrt(this.elementArea * (viewerSize.x / viewerSize.y));\n                newHeight = this.elementArea / newWidth;\n            }\n\n            this.element.style.width  = Math.round( newWidth ) + 'px';\n            this.element.style.height = Math.round( newHeight ) + 'px';\n\n            if (!this.elementArea) {\n                this.elementArea = newWidth * newHeight;\n            }\n\n            this.updateSize();\n        }\n\n        if (viewport && this.viewport) {\n            bounds      = viewport.getBoundsNoRotate(true);\n            topleft     = this.viewport.pixelFromPointNoRotate(bounds.getTopLeft(), false);\n            bottomright = this.viewport.pixelFromPointNoRotate(bounds.getBottomRight(), false)\n                .minus( this.totalBorderWidths );\n\n            //update style for navigator-box\n            var style = this.displayRegion.style;\n            style.display = this.world.getItemCount() ? 'block' : 'none';\n\n            style.top    = Math.round( topleft.y ) + 'px';\n            style.left   = Math.round( topleft.x ) + 'px';\n\n            var width = Math.abs( topleft.x - bottomright.x );\n            var height = Math.abs( topleft.y - bottomright.y );\n            // make sure width and height are non-negative so IE doesn't throw\n            style.width  = Math.round( Math.max( width, 0 ) ) + 'px';\n            style.height = Math.round( Math.max( height, 0 ) ) + 'px';\n        }\n\n    },\n\n    // overrides Viewer.addTiledImage\n    addTiledImage: function(options) {\n        var _this = this;\n\n        var original = options.originalTiledImage;\n        delete options.original;\n\n        var optionsClone = $.extend({}, options, {\n            success: function(event) {\n                var myItem = event.item;\n                myItem._originalForNavigator = original;\n                _this._matchBounds(myItem, original, true);\n                _this._matchOpacity(myItem, original);\n                _this._matchCompositeOperation(myItem, original);\n\n                function matchBounds() {\n                    _this._matchBounds(myItem, original);\n                }\n\n                function matchOpacity() {\n                    _this._matchOpacity(myItem, original);\n                }\n\n                function matchCompositeOperation() {\n                    _this._matchCompositeOperation(myItem, original);\n                }\n\n                original.addHandler('bounds-change', matchBounds);\n                original.addHandler('clip-change', matchBounds);\n                original.addHandler('opacity-change', matchOpacity);\n                original.addHandler('composite-operation-change', matchCompositeOperation);\n            }\n        });\n\n        return $.Viewer.prototype.addTiledImage.apply(this, [optionsClone]);\n    },\n\n    destroy: function() {\n        return $.Viewer.prototype.destroy.apply(this);\n    },\n\n    // private\n    _getMatchingItem: function(theirItem) {\n        var count = this.world.getItemCount();\n        var item;\n        for (var i = 0; i < count; i++) {\n            item = this.world.getItemAt(i);\n            if (item._originalForNavigator === theirItem) {\n                return item;\n            }\n        }\n\n        return null;\n    },\n\n    // private\n    _matchBounds: function(myItem, theirItem, immediately) {\n        var bounds = theirItem.getBoundsNoRotate();\n        myItem.setPosition(bounds.getTopLeft(), immediately);\n        myItem.setWidth(bounds.width, immediately);\n        myItem.setRotation(theirItem.getRotation(), immediately);\n        myItem.setClip(theirItem.getClip());\n        myItem.setFlip(theirItem.getFlip());\n    },\n\n    // private\n    _matchOpacity: function(myItem, theirItem) {\n        myItem.setOpacity(theirItem.opacity);\n    },\n\n    // private\n    _matchCompositeOperation: function(myItem, theirItem) {\n        myItem.setCompositeOperation(theirItem.compositeOperation);\n    }\n});\n\n\n/**\n * @private\n * @inner\n * @function\n */\nfunction onCanvasClick( event ) {\n  var canvasClickEventArgs = {\n    tracker: event.eventSource,\n    position: event.position,\n    quick: event.quick,\n    shift: event.shift,\n    originalEvent: event.originalEvent,\n    preventDefaultAction: false\n  };\n  /**\n   * Raised when a click event occurs on the {@link OpenSeadragon.Viewer#navigator} element.\n   *\n   * @event navigator-click\n   * @memberof OpenSeadragon.Viewer\n   * @type {object}\n   * @property {OpenSeadragon.Viewer} eventSource - A reference to the Viewer which raised this event.\n   * @property {OpenSeadragon.MouseTracker} tracker - A reference to the MouseTracker which originated this event.\n   * @property {OpenSeadragon.Point} position - The position of the event relative to the tracked element.\n   * @property {Boolean} quick - True only if the clickDistThreshold and clickTimeThreshold are both passed. Useful for differentiating between clicks and drags.\n   * @property {Boolean} shift - True if the shift key was pressed during this event.\n   * @property {Object} originalEvent - The original DOM event.\n   * @property {?Object} userData - Arbitrary subscriber-defined object.\n   * @property {Boolean} preventDefaultAction - Set to true to prevent default click to zoom behaviour. Default: false.\n   */\n\n   this.viewer.raiseEvent('navigator-click', canvasClickEventArgs);\n\n   if ( !canvasClickEventArgs.preventDefaultAction && event.quick && this.viewer.viewport && (this.panVertical || this.panHorizontal)) {\n    if(this.viewer.viewport.flipped) {\n      event.position.x = this.viewport.getContainerSize().x - event.position.x;\n    }\n    var target = this.viewport.pointFromPixel(event.position);\n    if (!this.panVertical) {\n      // perform only horizonal pan\n      target.y = this.viewer.viewport.getCenter(true).y;\n    } else if (!this.panHorizontal) {\n      // perform only vertical pan\n      target.x = this.viewer.viewport.getCenter(true).x;\n    }\n    this.viewer.viewport.panTo(target);\n    this.viewer.viewport.applyConstraints();\n  }\n\n}\n\n/**\n * @private\n * @inner\n * @function\n */\nfunction onCanvasDrag( event ) {\n    var canvasDragEventArgs = {\n      tracker: event.eventSource,\n      position: event.position,\n      delta: event.delta,\n      speed: event.speed,\n      direction: event.direction,\n      shift: event.shift,\n      originalEvent: event.originalEvent,\n      preventDefaultAction: false\n    };\n    /**\n     * Raised when a drag event occurs on the {@link OpenSeadragon.Viewer#navigator} element.\n     *\n     * @event navigator-drag\n     * @memberof OpenSeadragon.Viewer\n     * @type {object}\n     * @property {OpenSeadragon.Viewer} eventSource - A reference to the Viewer which raised this event.\n     * @property {OpenSeadragon.MouseTracker} tracker - A reference to the MouseTracker which originated this event.\n     * @property {OpenSeadragon.Point} position - The position of the event relative to the tracked element.\n     * @property {OpenSeadragon.Point} delta - The x,y components of the difference between start drag and end drag.\n     * @property {Number} speed - Current computed speed, in pixels per second.\n     * @property {Number} direction - Current computed direction, expressed as an angle counterclockwise relative to the positive X axis (-pi to pi, in radians). Only valid if speed > 0.\n     * @property {Boolean} shift - True if the shift key was pressed during this event.\n     * @property {Object} originalEvent - The original DOM event.\n     * @property {?Object} userData - Arbitrary subscriber-defined object.\n     * @property {Boolean} preventDefaultAction - Set to true to prevent default drag to pan behaviour. Default: false.\n     */\n     this.viewer.raiseEvent('navigator-drag', canvasDragEventArgs);\n\n     if ( !canvasDragEventArgs.preventDefaultAction && this.viewer.viewport ) {\n       if( !this.panHorizontal ){\n            event.delta.x = 0;\n        }\n        if( !this.panVertical ){\n            event.delta.y = 0;\n        }\n\n        if(this.viewer.viewport.flipped){\n            event.delta.x = -event.delta.x;\n        }\n\n        this.viewer.viewport.panBy(\n            this.viewport.deltaPointsFromPixels(\n                event.delta\n            )\n        );\n        if( this.viewer.constrainDuringPan ){\n            this.viewer.viewport.applyConstraints();\n        }\n    }\n}\n\n\n/**\n * @private\n * @inner\n * @function\n */\nfunction onCanvasRelease( event ) {\n    if ( event.insideElementPressed && this.viewer.viewport ) {\n        this.viewer.viewport.applyConstraints();\n    }\n}\n\n\n/**\n * @private\n * @inner\n * @function\n */\nfunction onCanvasScroll( event ) {\n    var eventArgs = {\n        tracker: event.eventSource,\n        position: event.position,\n        scroll: event.scroll,\n        shift: event.shift,\n        originalEvent: event.originalEvent,\n        preventDefault: event.preventDefault\n    };\n\n    /**\n     * Raised when a scroll event occurs on the {@link OpenSeadragon.Viewer#navigator} element (mouse wheel, touch pinch, etc.).\n     *\n     * @event navigator-scroll\n     * @memberof OpenSeadragon.Viewer\n     * @type {object}\n     * @property {OpenSeadragon.Viewer} eventSource - A reference to the Viewer which raised this event.\n     * @property {OpenSeadragon.MouseTracker} tracker - A reference to the MouseTracker which originated this event.\n     * @property {OpenSeadragon.Point} position - The position of the event relative to the tracked element.\n     * @property {Number} scroll - The scroll delta for the event.\n     * @property {Boolean} shift - True if the shift key was pressed during this event.\n     * @property {Object} originalEvent - The original DOM event.\n     * @property {Boolean} preventDefault - Set to true to prevent the default user-agent's handling of the wheel event.\n     * @property {?Object} userData - Arbitrary subscriber-defined object.\n     */\n    this.viewer.raiseEvent( 'navigator-scroll', eventArgs );\n\n    event.preventDefault = eventArgs.preventDefault;\n}\n\n/**\n    * @function\n    * @private\n    * @param {Object} element\n    * @param {Number} degrees\n    */\nfunction _setTransformRotate( element, degrees ) {\n  setElementTransform(element, \"rotate(\" + degrees + \"deg)\");\n}\n\nfunction setElementTransform( element, rule ) {\n  element.style.webkitTransform = rule;\n  element.style.mozTransform = rule;\n  element.style.msTransform = rule;\n  element.style.oTransform = rule;\n  element.style.transform = rule;\n}\n\n}( OpenSeadragon ));\n\n/*\n * OpenSeadragon - getString/setString\n *\n * Copyright (C) 2009 CodePlex Foundation\n * Copyright (C) 2010-2013 OpenSeadragon contributors\n *\n * Redistribution and use in source and binary forms, with or without\n * modification, are permitted provided that the following conditions are\n * met:\n *\n * - Redistributions of source code must retain the above copyright notice,\n *   this list of conditions and the following disclaimer.\n *\n * - Redistributions in binary form must reproduce the above copyright\n *   notice, this list of conditions and the following disclaimer in the\n *   documentation and/or other materials provided with the distribution.\n *\n * - Neither the name of CodePlex Foundation nor the names of its\n *   contributors may be used to endorse or promote products derived from\n *   this software without specific prior written permission.\n *\n * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS\n * \"AS IS\" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT\n * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR\n * A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT\n * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,\n * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED\n * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR\n * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF\n * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING\n * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS\n * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.\n */\n\n(function( $ ){\n\n//TODO: I guess this is where the i18n needs to be reimplemented.  I'll look\n//      into existing patterns for i18n in javascript but i think that mimicking\n//      pythons gettext might be a reasonable approach.\nvar I18N = {\n    Errors: {\n        Dzc:            \"Sorry, we don't support Deep Zoom Collections!\",\n        Dzi:            \"Hmm, this doesn't appear to be a valid Deep Zoom Image.\",\n        Xml:            \"Hmm, this doesn't appear to be a valid Deep Zoom Image.\",\n        ImageFormat:    \"Sorry, we don't support {0}-based Deep Zoom Images.\",\n        Security:       \"It looks like a security restriction stopped us from \" +\n                        \"loading this Deep Zoom Image.\",\n        Status:         \"This space unintentionally left blank ({0} {1}).\",\n        OpenFailed:     \"Unable to open {0}: {1}\"\n    },\n\n    Tooltips: {\n        FullPage:       \"Toggle full page\",\n        Home:           \"Go home\",\n        ZoomIn:         \"Zoom in\",\n        ZoomOut:        \"Zoom out\",\n        NextPage:       \"Next page\",\n        PreviousPage:   \"Previous page\",\n        RotateLeft:     \"Rotate left\",\n        RotateRight:    \"Rotate right\",\n        Flip:           \"Flip Horizontally\"\n    }\n};\n\n$.extend( $, /** @lends OpenSeadragon */{\n\n    /**\n     * @function\n     * @param {String} property\n     */\n    getString: function( prop ) {\n\n        var props   = prop.split('.'),\n            string  = null,\n            args    = arguments,\n            container = I18N,\n            i;\n\n        for (i = 0; i < props.length - 1; i++) {\n            // in case not a subproperty\n            container = container[ props[ i ] ] || {};\n        }\n        string = container[ props[ i ] ];\n\n        if ( typeof ( string ) !== \"string\" ) {\n            $.console.error( \"Untranslated source string:\", prop );\n            string = \"\"; // FIXME: this breaks gettext()-style convention, which would return source\n        }\n\n        return string.replace(/\\{\\d+\\}/g, function(capture) {\n            var i = parseInt( capture.match( /\\d+/ ), 10 ) + 1;\n            return i < args.length ?\n                args[ i ] :\n                \"\";\n        });\n    },\n\n    /**\n     * @function\n     * @param {String} property\n     * @param {*} value\n     */\n    setString: function( prop, value ) {\n\n        var props     = prop.split('.'),\n            container = I18N,\n            i;\n\n        for ( i = 0; i < props.length - 1; i++ ) {\n            if ( !container[ props[ i ] ] ) {\n                container[ props[ i ] ] = {};\n            }\n            container = container[ props[ i ] ];\n        }\n\n        container[ props[ i ] ] = value;\n    }\n\n});\n\n}( OpenSeadragon ));\n\n/*\n * OpenSeadragon - Point\n *\n * Copyright (C) 2009 CodePlex Foundation\n * Copyright (C) 2010-2013 OpenSeadragon contributors\n *\n * Redistribution and use in source and binary forms, with or without\n * modification, are permitted provided that the following conditions are\n * met:\n *\n * - Redistributions of source code must retain the above copyright notice,\n *   this list of conditions and the following disclaimer.\n *\n * - Redistributions in binary form must reproduce the above copyright\n *   notice, this list of conditions and the following disclaimer in the\n *   documentation and/or other materials provided with the distribution.\n *\n * - Neither the name of CodePlex Foundation nor the names of its\n *   contributors may be used to endorse or promote products derived from\n *   this software without specific prior written permission.\n *\n * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS\n * \"AS IS\" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT\n * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR\n * A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT\n * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,\n * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED\n * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR\n * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF\n * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING\n * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS\n * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.\n */\n\n(function( $ ){\n\n/**\n * @class Point\n * @classdesc A Point is really used as a 2-dimensional vector, equally useful for\n * representing a point on a plane, or the height and width of a plane\n * not requiring any other frame of reference.\n *\n * @memberof OpenSeadragon\n * @param {Number} [x] The vector component 'x'. Defaults to the origin at 0.\n * @param {Number} [y] The vector component 'y'. Defaults to the origin at 0.\n */\n$.Point = function( x, y ) {\n    /**\n     * The vector component 'x'.\n     * @member {Number} x\n     * @memberof OpenSeadragon.Point#\n     */\n    this.x = typeof ( x ) === \"number\" ? x : 0;\n    /**\n     * The vector component 'y'.\n     * @member {Number} y\n     * @memberof OpenSeadragon.Point#\n     */\n    this.y = typeof ( y ) === \"number\" ? y : 0;\n};\n\n/** @lends OpenSeadragon.Point.prototype */\n$.Point.prototype = {\n    /**\n     * @function\n     * @returns {OpenSeadragon.Point} a duplicate of this Point\n     */\n    clone: function() {\n        return new $.Point(this.x, this.y);\n    },\n\n    /**\n     * Add another Point to this point and return a new Point.\n     * @function\n     * @param {OpenSeadragon.Point} point The point to add vector components.\n     * @returns {OpenSeadragon.Point} A new point representing the sum of the\n     *  vector components\n     */\n    plus: function( point ) {\n        return new $.Point(\n            this.x + point.x,\n            this.y + point.y\n        );\n    },\n\n    /**\n     * Subtract another Point to this point and return a new Point.\n     * @function\n     * @param {OpenSeadragon.Point} point The point to subtract vector components.\n     * @returns {OpenSeadragon.Point} A new point representing the subtraction of the\n     *  vector components\n     */\n    minus: function( point ) {\n        return new $.Point(\n            this.x - point.x,\n            this.y - point.y\n        );\n    },\n\n    /**\n     * Multiply this point by a factor and return a new Point.\n     * @function\n     * @param {Number} factor The factor to multiply vector components.\n     * @returns {OpenSeadragon.Point} A new point representing the multiplication\n     *  of the vector components by the factor\n     */\n    times: function( factor ) {\n        return new $.Point(\n            this.x * factor,\n            this.y * factor\n        );\n    },\n\n    /**\n     * Divide this point by a factor and return a new Point.\n     * @function\n     * @param {Number} factor The factor to divide vector components.\n     * @returns {OpenSeadragon.Point} A new point representing the division of the\n     *  vector components by the factor\n     */\n    divide: function( factor ) {\n        return new $.Point(\n            this.x / factor,\n            this.y / factor\n        );\n    },\n\n    /**\n     * Compute the opposite of this point and return a new Point.\n     * @function\n     * @returns {OpenSeadragon.Point} A new point representing the opposite of the\n     *  vector components\n     */\n    negate: function() {\n        return new $.Point( -this.x, -this.y );\n    },\n\n    /**\n     * Compute the distance between this point and another point.\n     * @function\n     * @param {OpenSeadragon.Point} point The point to compute the distance with.\n     * @returns {Number} The distance between the 2 points\n     */\n    distanceTo: function( point ) {\n        return Math.sqrt(\n            Math.pow( this.x - point.x, 2 ) +\n            Math.pow( this.y - point.y, 2 )\n        );\n    },\n\n    /**\n     * Compute the squared distance between this point and another point.\n     * Useful for optimizing things like comparing distances.\n     * @function\n     * @param {OpenSeadragon.Point} point The point to compute the squared distance with.\n     * @returns {Number} The squared distance between the 2 points\n     */\n    squaredDistanceTo: function( point ) {\n        return Math.pow( this.x - point.x, 2 ) +\n            Math.pow( this.y - point.y, 2 );\n    },\n\n    /**\n     * Apply a function to each coordinate of this point and return a new point.\n     * @function\n     * @param {function} func The function to apply to each coordinate.\n     * @returns {OpenSeadragon.Point} A new point with the coordinates computed\n     * by the specified function\n     */\n    apply: function( func ) {\n        return new $.Point( func( this.x ), func( this.y ) );\n    },\n\n    /**\n     * Check if this point is equal to another one.\n     * @function\n     * @param {OpenSeadragon.Point} point The point to compare this point with.\n     * @returns {Boolean} true if they are equal, false otherwise.\n     */\n    equals: function( point ) {\n        return (\n            point instanceof $.Point\n        ) && (\n            this.x === point.x\n        ) && (\n            this.y === point.y\n        );\n    },\n\n    /**\n     * Rotates the point around the specified pivot\n     * From http://stackoverflow.com/questions/4465931/rotate-rectangle-around-a-point\n     * @function\n     * @param {Number} degress to rotate around the pivot.\n     * @param {OpenSeadragon.Point} [pivot=(0,0)] Point around which to rotate.\n     * Defaults to the origin.\n     * @returns {OpenSeadragon.Point}. A new point representing the point rotated around the specified pivot\n     */\n    rotate: function (degrees, pivot) {\n        pivot = pivot || new $.Point(0, 0);\n        var cos;\n        var sin;\n        // Avoid float computations when possible\n        if (degrees % 90 === 0) {\n            var d = $.positiveModulo(degrees, 360);\n            switch (d) {\n                case 0:\n                    cos = 1;\n                    sin = 0;\n                    break;\n                case 90:\n                    cos = 0;\n                    sin = 1;\n                    break;\n                case 180:\n                    cos = -1;\n                    sin = 0;\n                    break;\n                case 270:\n                    cos = 0;\n                    sin = -1;\n                    break;\n            }\n        } else {\n            var angle = degrees * Math.PI / 180.0;\n            cos = Math.cos(angle);\n            sin = Math.sin(angle);\n        }\n        var x = cos * (this.x - pivot.x) - sin * (this.y - pivot.y) + pivot.x;\n        var y = sin * (this.x - pivot.x) + cos * (this.y - pivot.y) + pivot.y;\n        return new $.Point(x, y);\n    },\n\n    /**\n     * Convert this point to a string in the format (x,y) where x and y are\n     * rounded to the nearest integer.\n     * @function\n     * @returns {String} A string representation of this point.\n     */\n    toString: function() {\n        return \"(\" + (Math.round(this.x * 100) / 100) + \",\" + (Math.round(this.y * 100) / 100) + \")\";\n    }\n};\n\n}( OpenSeadragon ));\n\n/*\n * OpenSeadragon - TileSource\n *\n * Copyright (C) 2009 CodePlex Foundation\n * Copyright (C) 2010-2013 OpenSeadragon contributors\n *\n * Redistribution and use in source and binary forms, with or without\n * modification, are permitted provided that the following conditions are\n * met:\n *\n * - Redistributions of source code must retain the above copyright notice,\n *   this list of conditions and the following disclaimer.\n *\n * - Redistributions in binary form must reproduce the above copyright\n *   notice, this list of conditions and the following disclaimer in the\n *   documentation and/or other materials provided with the distribution.\n *\n * - Neither the name of CodePlex Foundation nor the names of its\n *   contributors may be used to endorse or promote products derived from\n *   this software without specific prior written permission.\n *\n * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS\n * \"AS IS\" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT\n * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR\n * A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT\n * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,\n * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED\n * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR\n * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF\n * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING\n * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS\n * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.\n */\n\n(function( $ ){\n\n\n/**\n * @class TileSource\n * @classdesc The TileSource contains the most basic implementation required to create a\n * smooth transition between layers in an image pyramid. It has only a single key\n * interface that must be implemented to complete its key functionality:\n * 'getTileUrl'.  It also has several optional interfaces that can be\n * implemented if a new TileSource wishes to support configuration via a simple\n * object or array ('configure') and if the tile source supports or requires\n * configuration via retrieval of a document on the network ala AJAX or JSONP,\n * ('getImageInfo').\n * <br/>\n * By default the image pyramid is split into N layers where the image's longest\n * side in M (in pixels), where N is the smallest integer which satisfies\n *      <strong>2^(N+1) >= M</strong>.\n *\n * @memberof OpenSeadragon\n * @extends OpenSeadragon.EventSource\n * @param {Object} options\n *      You can either specify a URL, or literally define the TileSource (by specifying\n *      width, height, tileSize, tileOverlap, minLevel, and maxLevel). For the former,\n *      the extending class is expected to implement 'getImageInfo' and 'configure'.\n *      For the latter, the construction is assumed to occur through\n *      the extending classes implementation of 'configure'.\n * @param {String} [options.url]\n *      The URL for the data necessary for this TileSource.\n * @param {String} [options.referenceStripThumbnailUrl]\n *      The URL for a thumbnail image to be used by the reference strip\n * @param {Function} [options.success]\n *      A function to be called upon successful creation.\n * @param {Boolean} [options.ajaxWithCredentials]\n *      If this TileSource needs to make an AJAX call, this specifies whether to set\n *      the XHR's withCredentials (for accessing secure data).\n * @param {Object} [options.ajaxHeaders]\n *      A set of headers to include in AJAX requests.\n * @param {Boolean} [options.splitHashDataForPost]\n *      First occurrence of '#' in the options.url is used to split URL\n *      and the latter part is treated as POST data (applies to getImageInfo(...))\n * @param {Number} [options.width]\n *      Width of the source image at max resolution in pixels.\n * @param {Number} [options.height]\n *      Height of the source image at max resolution in pixels.\n * @param {Number} [options.tileSize]\n *      The size of the tiles to assumed to make up each pyramid layer in pixels.\n *      Tile size determines the point at which the image pyramid must be\n *      divided into a matrix of smaller images.\n *      Use options.tileWidth and options.tileHeight to support non-square tiles.\n * @param {Number} [options.tileWidth]\n *      The width of the tiles to assumed to make up each pyramid layer in pixels.\n * @param {Number} [options.tileHeight]\n *      The height of the tiles to assumed to make up each pyramid layer in pixels.\n * @param {Number} [options.tileOverlap]\n *      The number of pixels each tile is expected to overlap touching tiles.\n * @param {Number} [options.minLevel]\n *      The minimum level to attempt to load.\n * @param {Number} [options.maxLevel]\n *      The maximum level to attempt to load.\n */\n$.TileSource = function( width, height, tileSize, tileOverlap, minLevel, maxLevel ) {\n    var _this = this;\n\n    var args = arguments,\n        options,\n        i;\n\n    if( $.isPlainObject( width ) ){\n        options = width;\n    }else{\n        options = {\n            width: args[0],\n            height: args[1],\n            tileSize: args[2],\n            tileOverlap: args[3],\n            minLevel: args[4],\n            maxLevel: args[5]\n        };\n    }\n\n    //Tile sources supply some events, namely 'ready' when they must be configured\n    //by asynchronously fetching their configuration data.\n    $.EventSource.call( this );\n\n    //we allow options to override anything we don't treat as\n    //required via idiomatic options or which is functionally\n    //set depending on the state of the readiness of this tile\n    //source\n    $.extend( true, this, options );\n\n    if (!this.success) {\n        //Any functions that are passed as arguments are bound to the ready callback\n        for ( i = 0; i < arguments.length; i++ ) {\n            if ( $.isFunction( arguments[ i ] ) ) {\n                this.success = arguments[ i ];\n                //only one callback per constructor\n                break;\n            }\n        }\n    }\n\n    if (this.success) {\n        this.addHandler( 'ready', function ( event ) {\n            _this.success( event );\n        } );\n    }\n\n    /**\n     * Ratio of width to height\n     * @member {Number} aspectRatio\n     * @memberof OpenSeadragon.TileSource#\n     */\n    /**\n     * Vector storing x and y dimensions ( width and height respectively ).\n     * @member {OpenSeadragon.Point} dimensions\n     * @memberof OpenSeadragon.TileSource#\n     */\n    /**\n     * The overlap in pixels each tile shares with its adjacent neighbors.\n     * @member {Number} tileOverlap\n     * @memberof OpenSeadragon.TileSource#\n     */\n    /**\n     * The minimum pyramid level this tile source supports or should attempt to load.\n     * @member {Number} minLevel\n     * @memberof OpenSeadragon.TileSource#\n     */\n    /**\n     * The maximum pyramid level this tile source supports or should attempt to load.\n     * @member {Number} maxLevel\n     * @memberof OpenSeadragon.TileSource#\n     */\n    /**\n     *\n     * @member {Boolean} ready\n     * @memberof OpenSeadragon.TileSource#\n     */\n\n    if( 'string' === $.type( arguments[ 0 ] ) ){\n        this.url = arguments[0];\n    }\n\n    if (this.url) {\n        //in case the getImageInfo method is overridden and/or implies an\n        //async mechanism set some safe defaults first\n        this.aspectRatio = 1;\n        this.dimensions  = new $.Point( 10, 10 );\n        this._tileWidth  = 0;\n        this._tileHeight = 0;\n        this.tileOverlap = 0;\n        this.minLevel    = 0;\n        this.maxLevel    = 0;\n        this.ready       = false;\n        //configuration via url implies the extending class\n        //implements and 'configure'\n        this.getImageInfo( this.url );\n\n    } else {\n\n        //explicit configuration via positional args in constructor\n        //or the more idiomatic 'options' object\n        this.ready       = true;\n        this.aspectRatio = (options.width && options.height) ?\n            (options.width / options.height) : 1;\n        this.dimensions  = new $.Point( options.width, options.height );\n\n        if ( this.tileSize ){\n            this._tileWidth = this._tileHeight = this.tileSize;\n            delete this.tileSize;\n        } else {\n            if( this.tileWidth ){\n                // We were passed tileWidth in options, but we want to rename it\n                // with a leading underscore to make clear that it is not safe to directly modify it\n                this._tileWidth = this.tileWidth;\n                delete this.tileWidth;\n            } else {\n                this._tileWidth = 0;\n            }\n\n            if( this.tileHeight ){\n                // See note above about renaming this.tileWidth\n                this._tileHeight = this.tileHeight;\n                delete this.tileHeight;\n            } else {\n                this._tileHeight = 0;\n            }\n        }\n\n        this.tileOverlap = options.tileOverlap ? options.tileOverlap : 0;\n        this.minLevel    = options.minLevel ? options.minLevel : 0;\n        this.maxLevel    = ( undefined !== options.maxLevel && null !== options.maxLevel ) ?\n            options.maxLevel : (\n                ( options.width && options.height ) ? Math.ceil(\n                    Math.log( Math.max( options.width, options.height ) ) /\n                    Math.log( 2 )\n                ) : 0\n            );\n        if( this.success && $.isFunction( this.success ) ){\n            this.success( this );\n        }\n    }\n\n\n};\n\n/** @lends OpenSeadragon.TileSource.prototype */\n$.TileSource.prototype = {\n\n    getTileSize: function( level ) {\n        $.console.error(\n            \"[TileSource.getTileSize] is deprecated. \" +\n            \"Use TileSource.getTileWidth() and TileSource.getTileHeight() instead\"\n        );\n        return this._tileWidth;\n    },\n\n    /**\n     * Return the tileWidth for a given level.\n     * Subclasses should override this if tileWidth can be different at different levels\n     *   such as in IIIFTileSource.  Code should use this function rather than reading\n     *   from ._tileWidth directly.\n     * @function\n     * @param {Number} level\n     */\n    getTileWidth: function( level ) {\n        if (!this._tileWidth) {\n            return this.getTileSize(level);\n        }\n        return this._tileWidth;\n    },\n\n    /**\n     * Return the tileHeight for a given level.\n     * Subclasses should override this if tileHeight can be different at different levels\n     *   such as in IIIFTileSource.  Code should use this function rather than reading\n     *   from ._tileHeight directly.\n     * @function\n     * @param {Number} level\n     */\n    getTileHeight: function( level ) {\n        if (!this._tileHeight) {\n            return this.getTileSize(level);\n        }\n        return this._tileHeight;\n    },\n\n    /**\n     * Set the maxLevel to the given level, and perform the memoization of\n     * getLevelScale with the new maxLevel. This function can be useful if the\n     * memoization is required before the first call of getLevelScale, or both\n     * memoized getLevelScale and maxLevel should be changed accordingly.\n     * @function\n     * @param {Number} level\n     */\n    setMaxLevel: function( level ) {\n        this.maxLevel = level;\n        this._memoizeLevelScale();\n    },\n\n    /**\n     * @function\n     * @param {Number} level\n     */\n    getLevelScale: function( level ) {\n        // if getLevelScale is not memoized, we generate the memoized version\n        // at the first call and return the result\n        this._memoizeLevelScale();\n        return this.getLevelScale( level );\n    },\n\n    // private\n    _memoizeLevelScale: function() {\n        // see https://github.com/openseadragon/openseadragon/issues/22\n        // we use the tilesources implementation of getLevelScale to generate\n        // a memoized re-implementation\n        var levelScaleCache = {},\n            i;\n        for( i = 0; i <= this.maxLevel; i++ ){\n            levelScaleCache[ i ] = 1 / Math.pow(2, this.maxLevel - i);\n        }\n        this.getLevelScale = function( _level ){\n            return levelScaleCache[ _level ];\n        };\n    },\n\n    /**\n     * @function\n     * @param {Number} level\n     */\n    getNumTiles: function( level ) {\n        var scale = this.getLevelScale( level ),\n            x = Math.ceil( scale * this.dimensions.x / this.getTileWidth(level) ),\n            y = Math.ceil( scale * this.dimensions.y / this.getTileHeight(level) );\n\n        return new $.Point( x, y );\n    },\n\n    /**\n     * @function\n     * @param {Number} level\n     */\n    getPixelRatio: function( level ) {\n        var imageSizeScaled = this.dimensions.times( this.getLevelScale( level ) ),\n            rx = 1.0 / imageSizeScaled.x * $.pixelDensityRatio,\n            ry = 1.0 / imageSizeScaled.y * $.pixelDensityRatio;\n\n        return new $.Point(rx, ry);\n    },\n\n\n    /**\n     * @function\n     * @returns {Number} The highest level in this tile source that can be contained in a single tile.\n     */\n    getClosestLevel: function() {\n        var i,\n            tiles;\n\n        for (i = this.minLevel + 1; i <= this.maxLevel; i++){\n            tiles = this.getNumTiles(i);\n            if (tiles.x > 1 || tiles.y > 1) {\n                break;\n            }\n        }\n\n        return i - 1;\n    },\n\n    /**\n     * @function\n     * @param {Number} level\n     * @param {OpenSeadragon.Point} point\n     */\n    getTileAtPoint: function(level, point) {\n        var validPoint = point.x >= 0 && point.x <= 1 &&\n            point.y >= 0 && point.y <= 1 / this.aspectRatio;\n        $.console.assert(validPoint, \"[TileSource.getTileAtPoint] must be called with a valid point.\");\n\n        var widthScaled = this.dimensions.x * this.getLevelScale(level);\n        var pixelX = point.x * widthScaled;\n        var pixelY = point.y * widthScaled;\n\n        var x = Math.floor(pixelX / this.getTileWidth(level));\n        var y = Math.floor(pixelY / this.getTileHeight(level));\n\n        // When point.x == 1 or point.y == 1 / this.aspectRatio we want to\n        // return the last tile of the row/column\n        if (point.x >= 1) {\n            x = this.getNumTiles(level).x - 1;\n        }\n        var EPSILON = 1e-15;\n        if (point.y >= 1 / this.aspectRatio - EPSILON) {\n            y = this.getNumTiles(level).y - 1;\n        }\n\n        return new $.Point(x, y);\n    },\n\n    /**\n     * @function\n     * @param {Number} level\n     * @param {Number} x\n     * @param {Number} y\n     * @param {Boolean} [isSource=false] Whether to return the source bounds of the tile.\n     * @returns {OpenSeadragon.Rect} Either where this tile fits (in normalized coordinates) or the\n     * portion of the tile to use as the source of the drawing operation (in pixels), depending on\n     * the isSource parameter.\n     */\n    getTileBounds: function( level, x, y, isSource ) {\n        var dimensionsScaled = this.dimensions.times( this.getLevelScale( level ) ),\n            tileWidth = this.getTileWidth(level),\n            tileHeight = this.getTileHeight(level),\n            px = ( x === 0 ) ? 0 : tileWidth * x - this.tileOverlap,\n            py = ( y === 0 ) ? 0 : tileHeight * y - this.tileOverlap,\n            sx = tileWidth + ( x === 0 ? 1 : 2 ) * this.tileOverlap,\n            sy = tileHeight + ( y === 0 ? 1 : 2 ) * this.tileOverlap,\n            scale = 1.0 / dimensionsScaled.x;\n\n        sx = Math.min( sx, dimensionsScaled.x - px );\n        sy = Math.min( sy, dimensionsScaled.y - py );\n\n        if (isSource) {\n            return new $.Rect(0, 0, sx, sy);\n        }\n\n        return new $.Rect( px * scale, py * scale, sx * scale, sy * scale );\n    },\n\n\n    /**\n     * Responsible for retrieving, and caching the\n     * image metadata pertinent to this TileSources implementation.\n     * @function\n     * @param {String} url\n     * @throws {Error}\n     */\n    getImageInfo: function( url ) {\n        var _this = this,\n            callbackName,\n            callback,\n            readySource,\n            options,\n            urlParts,\n            filename,\n            lastDot;\n\n\n        if( url ) {\n            urlParts = url.split( '/' );\n            filename = urlParts[ urlParts.length - 1 ];\n            lastDot  = filename.lastIndexOf( '.' );\n            if ( lastDot > -1 ) {\n                urlParts[ urlParts.length - 1 ] = filename.slice( 0, lastDot );\n            }\n        }\n\n        var postData = null;\n        if (this.splitHashDataForPost) {\n            var hashIdx = url.indexOf(\"#\");\n            if (hashIdx !== -1) {\n                postData = url.substring(hashIdx + 1);\n                url = url.substr(0, hashIdx);\n            }\n        }\n\n        callback = function( data ){\n            if( typeof (data) === \"string\" ) {\n                data = $.parseXml( data );\n            }\n            var $TileSource = $.TileSource.determineType( _this, data, url );\n            if ( !$TileSource ) {\n                /**\n                 * Raised when an error occurs loading a TileSource.\n                 *\n                 * @event open-failed\n                 * @memberof OpenSeadragon.TileSource\n                 * @type {object}\n                 * @property {OpenSeadragon.TileSource} eventSource - A reference to the TileSource which raised the event.\n                 * @property {String} message\n                 * @property {String} source\n                 * @property {?Object} userData - Arbitrary subscriber-defined object.\n                 */\n                _this.raiseEvent( 'open-failed', { message: \"Unable to load TileSource\", source: url } );\n                return;\n            }\n\n            options = $TileSource.prototype.configure.apply( _this, [ data, url, postData ]);\n            if (options.ajaxWithCredentials === undefined) {\n                options.ajaxWithCredentials = _this.ajaxWithCredentials;\n            }\n\n            readySource = new $TileSource( options );\n            _this.ready = true;\n            /**\n             * Raised when a TileSource is opened and initialized.\n             *\n             * @event ready\n             * @memberof OpenSeadragon.TileSource\n             * @type {object}\n             * @property {OpenSeadragon.TileSource} eventSource - A reference to the TileSource which raised the event.\n             * @property {Object} tileSource\n             * @property {?Object} userData - Arbitrary subscriber-defined object.\n             */\n            _this.raiseEvent( 'ready', { tileSource: readySource } );\n        };\n\n        if( url.match(/\\.js$/) ){\n            //TODO: Its not very flexible to require tile sources to end jsonp\n            //      request for info  with a url that ends with '.js' but for\n            //      now it's the only way I see to distinguish uniformly.\n            callbackName = url.split('/').pop().replace('.js', '');\n            $.jsonp({\n                url: url,\n                async: false,\n                callbackName: callbackName,\n                callback: callback\n            });\n        } else {\n            // request info via xhr asynchronously.\n            $.makeAjaxRequest( {\n                url: url,\n                postData: postData,\n                withCredentials: this.ajaxWithCredentials,\n                headers: this.ajaxHeaders,\n                success: function( xhr ) {\n                    var data = processResponse( xhr );\n                    callback( data );\n                },\n                error: function ( xhr, exc ) {\n                    var msg;\n\n                    /*\n                        IE < 10 will block XHR requests to different origins. Any property access on the request\n                        object will raise an exception which we'll attempt to handle by formatting the original\n                        exception rather than the second one raised when we try to access xhr.status\n                     */\n                    try {\n                        msg = \"HTTP \" + xhr.status + \" attempting to load TileSource: \" + url;\n                    } catch ( e ) {\n                        var formattedExc;\n                        if ( typeof ( exc ) === \"undefined\" || !exc.toString ) {\n                            formattedExc = \"Unknown error\";\n                        } else {\n                            formattedExc = exc.toString();\n                        }\n\n                        msg = formattedExc + \" attempting to load TileSource: \" + url;\n                    }\n\n                    $.console.error(msg);\n\n                    /***\n                     * Raised when an error occurs loading a TileSource.\n                     *\n                     * @event open-failed\n                     * @memberof OpenSeadragon.TileSource\n                     * @type {object}\n                     * @property {OpenSeadragon.TileSource} eventSource - A reference to the TileSource which raised the event.\n                     * @property {String} message\n                     * @property {String} source\n                     * @property {String} postData - HTTP POST data (usually but not necessarily in k=v&k2=v2... form,\n                     *      see TileSrouce::getPostData) or null\n                     * @property {?Object} userData - Arbitrary subscriber-defined object.\n                     */\n                    _this.raiseEvent( 'open-failed', {\n                        message: msg,\n                        source: url,\n                        postData: postData\n                    });\n                }\n            });\n        }\n\n    },\n\n    /**\n     * Responsible determining if a the particular TileSource supports the\n     * data format ( and allowed to apply logic against the url the data was\n     * loaded from, if any ). Overriding implementations are expected to do\n     * something smart with data and / or url to determine support.  Also\n     * understand that iteration order of TileSources is not guarunteed so\n     * please make sure your data or url is expressive enough to ensure a simple\n     * and sufficient mechanisim for clear determination.\n     * @function\n     * @param {String|Object|Array|Document} data\n     * @param {String} url - the url the data was loaded\n     *      from if any.\n     * @return {Boolean}\n     */\n    supports: function( data, url ) {\n        return false;\n    },\n\n    /**\n     * Responsible for parsing and configuring the\n     * image metadata pertinent to this TileSources implementation.\n     * This method is not implemented by this class other than to throw an Error\n     * announcing you have to implement it.  Because of the variety of tile\n     * server technologies, and various specifications for building image\n     * pyramids, this method is here to allow easy integration.\n     * @function\n     * @param {String|Object|Array|Document} data\n     * @param {String} url - the url the data was loaded\n     *      from if any.\n     * @param {String} postData - HTTP POST data in k=v&k2=v2... form or null value obtained from\n     *      the protocol URL after '#' sign if flag splitHashDataForPost set to 'true'\n     * @return {Object} options - A dictionary of keyword arguments sufficient\n     *      to configure the tile source constructor (include all values you want to\n     *      instantiate the TileSource subclass with - what _options_ object should contain).\n     * @throws {Error}\n     */\n    configure: function( data, url, postData ) {\n        throw new Error( \"Method not implemented.\" );\n    },\n\n    /**\n     * Responsible for retrieving the url which will return an image for the\n     * region specified by the given x, y, and level components.\n     * This method is not implemented by this class other than to throw an Error\n     * announcing you have to implement it.  Because of the variety of tile\n     * server technologies, and various specifications for building image\n     * pyramids, this method is here to allow easy integration.\n     * @function\n     * @param {Number} level\n     * @param {Number} x\n     * @param {Number} y\n     * @throws {Error}\n     */\n    getTileUrl: function( level, x, y ) {\n        throw new Error( \"Method not implemented.\" );\n    },\n\n    /**\n     * Must use AJAX in order to work, i.e. loadTilesWithAjax = true is set.\n     * If a value is returned, ajax issues POST request to the tile url.\n     * If null is returned, ajax issues GET request.\n     * The return value must comply to the header 'content type'.\n     *\n     * Examples (USED HEADER --> getTilePostData CODE):\n     * 'Content-type': 'application/x-www-form-urlencoded' -->\n     *   return \"key1=value=1&key2=value2\";\n     *\n     * 'Content-type': 'application/x-www-form-urlencoded' -->\n     *   return JSON.stringify({key: \"value\", number: 5});\n     *\n     * 'Content-type': 'multipart/form-data' -->\n     *   let result = new FormData();\n     *   result.append(\"data\", myData);\n     *   return result;\n     *\n     * IMPORTANT: in case you move all the logic on image fetching\n     * to post data, you must re-define 'getTileHashKey(...)' to\n     * stay unique for different tile images.\n     *\n     * @param {Number} level\n     * @param {Number} x\n     * @param {Number} y\n     * @return {*|null} post data to send with tile configuration request\n     */\n    getTilePostData: function( level, x, y ) {\n        return null;\n    },\n\n    /**\n     * Responsible for retrieving the headers which will be attached to the image request for the\n     * region specified by the given x, y, and level components.\n     * This option is only relevant if {@link OpenSeadragon.Options}.loadTilesWithAjax is set to true.\n     * The headers returned here will override headers specified at the Viewer or TiledImage level.\n     * Specifying a falsy value for a header will clear its existing value set at the Viewer or\n     * TiledImage level (if any).\n     * @function\n     * @param {Number} level\n     * @param {Number} x\n     * @param {Number} y\n     * @returns {Object}\n     */\n    getTileAjaxHeaders: function( level, x, y ) {\n        return {};\n    },\n\n    /**\n     * The tile cache object is uniquely determined by this key and used to lookup\n     * the image data in cache: keys should be different if images are different.\n     *\n     * In case a tile has context2D property defined (TileSource.prototype.getContext2D)\n     * or its context2D is set manually; the cache is not used and this function\n     * is irrelevant.\n     * Note: default behaviour does not take into account post data.\n     * @param {Number} level tile level it was fetched with\n     * @param {Number} x x-coordinate in the pyramid level\n     * @param {Number} y y-coordinate in the pyramid level\n     * @param {String} url the tile was fetched with\n     * @param {Object} ajaxHeaders the tile was fetched with\n     * @param {*} postData data the tile was fetched with (type depends on getTilePostData(..) return type)\n     */\n    getTileHashKey: function(level, x, y, url, ajaxHeaders, postData) {\n        if (ajaxHeaders) {\n            return url + \"+\" + JSON.stringify(ajaxHeaders);\n        } else {\n            return url;\n        }\n    },\n\n    /**\n     * @function\n     * @param {Number} level\n     * @param {Number} x\n     * @param {Number} y\n     */\n    tileExists: function( level, x, y ) {\n        var numTiles = this.getNumTiles( level );\n        return level >= this.minLevel &&\n               level <= this.maxLevel &&\n               x >= 0 &&\n               y >= 0 &&\n               x < numTiles.x &&\n               y < numTiles.y;\n    }\n};\n\n\n$.extend( true, $.TileSource.prototype, $.EventSource.prototype );\n\n\n/**\n * Decides whether to try to process the response as xml, json, or hand back\n * the text\n * @private\n * @inner\n * @function\n * @param {XMLHttpRequest} xhr - the completed network request\n */\nfunction processResponse( xhr ){\n    var responseText = xhr.responseText,\n        status       = xhr.status,\n        statusText,\n        data;\n\n    if ( !xhr ) {\n        throw new Error( $.getString( \"Errors.Security\" ) );\n    } else if ( xhr.status !== 200 && xhr.status !== 0 ) {\n        status     = xhr.status;\n        statusText = ( status === 404 ) ?\n            \"Not Found\" :\n            xhr.statusText;\n        throw new Error( $.getString( \"Errors.Status\", status, statusText ) );\n    }\n\n    if( responseText.match(/\\s*<.*/) ){\n        try{\n        data = ( xhr.responseXML && xhr.responseXML.documentElement ) ?\n            xhr.responseXML :\n            $.parseXml( responseText );\n        } catch (e){\n            data = xhr.responseText;\n        }\n    }else if( responseText.match(/\\s*[{[].*/) ){\n        try{\n          data = $.parseJSON(responseText);\n        } catch(e){\n          data =  responseText;\n        }\n    }else{\n        data = responseText;\n    }\n    return data;\n}\n\n\n/**\n * Determines the TileSource Implementation by introspection of OpenSeadragon\n * namespace, calling each TileSource implementation of 'isType'\n * @private\n * @inner\n * @function\n * @param {Object|Array|Document} data - the tile source configuration object\n * @param {String} url - the url where the tile source configuration object was\n *      loaded from, if any.\n */\n$.TileSource.determineType = function( tileSource, data, url ){\n    var property;\n    for( property in OpenSeadragon ){\n        if( property.match(/.+TileSource$/) &&\n            $.isFunction( OpenSeadragon[ property ] ) &&\n            $.isFunction( OpenSeadragon[ property ].prototype.supports ) &&\n            OpenSeadragon[ property ].prototype.supports.call( tileSource, data, url )\n        ){\n            return OpenSeadragon[ property ];\n        }\n    }\n\n    $.console.error( \"No TileSource was able to open %s %s\", url, data );\n\n    return null;\n};\n\n\n}( OpenSeadragon ));\n\n/*\n * OpenSeadragon - DziTileSource\n *\n * Copyright (C) 2009 CodePlex Foundation\n * Copyright (C) 2010-2013 OpenSeadragon contributors\n *\n * Redistribution and use in source and binary forms, with or without\n * modification, are permitted provided that the following conditions are\n * met:\n *\n * - Redistributions of source code must retain the above copyright notice,\n *   this list of conditions and the following disclaimer.\n *\n * - Redistributions in binary form must reproduce the above copyright\n *   notice, this list of conditions and the following disclaimer in the\n *   documentation and/or other materials provided with the distribution.\n *\n * - Neither the name of CodePlex Foundation nor the names of its\n *   contributors may be used to endorse or promote products derived from\n *   this software without specific prior written permission.\n *\n * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS\n * \"AS IS\" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT\n * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR\n * A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT\n * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,\n * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED\n * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR\n * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF\n * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING\n * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS\n * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.\n */\n\n(function( $ ){\n\n/**\n * @class DziTileSource\n * @memberof OpenSeadragon\n * @extends OpenSeadragon.TileSource\n * @param {Number|Object} width - the pixel width of the image or the idiomatic\n *      options object which is used instead of positional arguments.\n * @param {Number} height\n * @param {Number} tileSize\n * @param {Number} tileOverlap\n * @param {String} tilesUrl\n * @param {String} fileFormat\n * @param {OpenSeadragon.DisplayRect[]} displayRects\n * @property {String} tilesUrl\n * @property {String} fileFormat\n * @property {OpenSeadragon.DisplayRect[]} displayRects\n */\n$.DziTileSource = function( width, height, tileSize, tileOverlap, tilesUrl, fileFormat, displayRects, minLevel, maxLevel ) {\n    var i,\n        rect,\n        level,\n        options;\n\n    if( $.isPlainObject( width ) ){\n        options = width;\n    }else{\n        options = {\n            width: arguments[ 0 ],\n            height: arguments[ 1 ],\n            tileSize: arguments[ 2 ],\n            tileOverlap: arguments[ 3 ],\n            tilesUrl: arguments[ 4 ],\n            fileFormat: arguments[ 5 ],\n            displayRects: arguments[ 6 ],\n            minLevel: arguments[ 7 ],\n            maxLevel: arguments[ 8 ]\n        };\n    }\n\n    this._levelRects  = {};\n    this.tilesUrl     = options.tilesUrl;\n    this.fileFormat   = options.fileFormat;\n    this.displayRects = options.displayRects;\n\n    if ( this.displayRects ) {\n        for ( i = this.displayRects.length - 1; i >= 0; i-- ) {\n            rect = this.displayRects[ i ];\n            for ( level = rect.minLevel; level <= rect.maxLevel; level++ ) {\n                if ( !this._levelRects[ level ] ) {\n                    this._levelRects[ level ] = [];\n                }\n                this._levelRects[ level ].push( rect );\n            }\n        }\n    }\n\n    $.TileSource.apply( this, [ options ] );\n\n};\n\n$.extend( $.DziTileSource.prototype, $.TileSource.prototype, /** @lends OpenSeadragon.DziTileSource.prototype */{\n\n\n    /**\n     * Determine if the data and/or url imply the image service is supported by\n     * this tile source.\n     * @function\n     * @param {Object|Array} data\n     * @param {String} optional - url\n     */\n    supports: function( data, url ){\n        var ns;\n        if ( data.Image ) {\n            ns = data.Image.xmlns;\n        } else if ( data.documentElement) {\n            if (\"Image\" === data.documentElement.localName || \"Image\" === data.documentElement.tagName) {\n                ns = data.documentElement.namespaceURI;\n            }\n        }\n\n        ns = (ns || '').toLowerCase();\n\n        return (ns.indexOf('schemas.microsoft.com/deepzoom/2008') !== -1 ||\n            ns.indexOf('schemas.microsoft.com/deepzoom/2009') !== -1);\n    },\n\n    /**\n     *\n     * @function\n     * @param {Object|XMLDocument} data - the raw configuration\n     * @param {String} url - the url the data was retrieved from if any.\n     * @param {String} postData - HTTP POST data in k=v&k2=v2... form or null\n     * @return {Object} options - A dictionary of keyword arguments sufficient\n     *      to configure this tile sources constructor.\n     */\n    configure: function( data, url, postData ){\n\n        var options;\n\n        if( !$.isPlainObject(data) ){\n\n            options = configureFromXML( this, data );\n\n        }else{\n\n            options = configureFromObject( this, data );\n        }\n\n        if (url && !options.tilesUrl) {\n            options.tilesUrl = url.replace(\n                    /([^/]+?)(\\.(dzi|xml|js)?(\\?[^/]*)?)?\\/?$/, '$1_files/');\n\n            if (url.search(/\\.(dzi|xml|js)\\?/) !== -1) {\n                options.queryParams = url.match(/\\?.*/);\n            }else{\n                options.queryParams = '';\n            }\n        }\n\n        return options;\n    },\n\n\n    /**\n     * @function\n     * @param {Number} level\n     * @param {Number} x\n     * @param {Number} y\n     */\n    getTileUrl: function( level, x, y ) {\n        return [ this.tilesUrl, level, '/', x, '_', y, '.', this.fileFormat, this.queryParams ].join( '' );\n    },\n\n\n    /**\n     * @function\n     * @param {Number} level\n     * @param {Number} x\n     * @param {Number} y\n     */\n    tileExists: function( level, x, y ) {\n        var rects = this._levelRects[ level ],\n            rect,\n            scale,\n            xMin,\n            yMin,\n            xMax,\n            yMax,\n            i;\n\n        if ((this.minLevel && level < this.minLevel) || (this.maxLevel && level > this.maxLevel)) {\n            return false;\n        }\n\n        if ( !rects || !rects.length ) {\n            return true;\n        }\n\n        for ( i = rects.length - 1; i >= 0; i-- ) {\n            rect = rects[ i ];\n\n            if ( level < rect.minLevel || level > rect.maxLevel ) {\n                continue;\n            }\n\n            scale = this.getLevelScale( level );\n            xMin = rect.x * scale;\n            yMin = rect.y * scale;\n            xMax = xMin + rect.width * scale;\n            yMax = yMin + rect.height * scale;\n\n            xMin = Math.floor( xMin / this._tileWidth );\n            yMin = Math.floor( yMin / this._tileWidth ); // DZI tiles are square, so we just use _tileWidth\n            xMax = Math.ceil( xMax / this._tileWidth );\n            yMax = Math.ceil( yMax / this._tileWidth );\n\n            if ( xMin <= x && x < xMax && yMin <= y && y < yMax ) {\n                return true;\n            }\n        }\n\n        return false;\n    }\n});\n\n\n/**\n * @private\n * @inner\n * @function\n */\nfunction configureFromXML( tileSource, xmlDoc ){\n\n    if ( !xmlDoc || !xmlDoc.documentElement ) {\n        throw new Error( $.getString( \"Errors.Xml\" ) );\n    }\n\n    var root           = xmlDoc.documentElement,\n        rootName       = root.localName || root.tagName,\n        ns             = xmlDoc.documentElement.namespaceURI,\n        configuration  = null,\n        displayRects   = [],\n        dispRectNodes,\n        dispRectNode,\n        rectNode,\n        sizeNode,\n        i;\n\n    if ( rootName === \"Image\" ) {\n\n        try {\n            sizeNode = root.getElementsByTagName(\"Size\" )[ 0 ];\n            if (sizeNode === undefined) {\n                sizeNode = root.getElementsByTagNameNS(ns, \"Size\" )[ 0 ];\n            }\n\n            configuration = {\n                Image: {\n                    xmlns:       \"http://schemas.microsoft.com/deepzoom/2008\",\n                    Url:         root.getAttribute( \"Url\" ),\n                    Format:      root.getAttribute( \"Format\" ),\n                    DisplayRect: null,\n                    Overlap:     parseInt( root.getAttribute( \"Overlap\" ), 10 ),\n                    TileSize:    parseInt( root.getAttribute( \"TileSize\" ), 10 ),\n                    Size: {\n                        Height: parseInt( sizeNode.getAttribute( \"Height\" ), 10 ),\n                        Width:  parseInt( sizeNode.getAttribute( \"Width\" ), 10 )\n                    }\n                }\n            };\n\n            if ( !$.imageFormatSupported( configuration.Image.Format ) ) {\n                throw new Error(\n                    $.getString( \"Errors.ImageFormat\", configuration.Image.Format.toUpperCase() )\n                );\n            }\n\n            dispRectNodes = root.getElementsByTagName(\"DisplayRect\" );\n            if (dispRectNodes === undefined) {\n                dispRectNodes = root.getElementsByTagNameNS(ns, \"DisplayRect\" )[ 0 ];\n            }\n\n            for ( i = 0; i < dispRectNodes.length; i++ ) {\n                dispRectNode = dispRectNodes[ i ];\n                rectNode     = dispRectNode.getElementsByTagName(\"Rect\" )[ 0 ];\n                if (rectNode === undefined) {\n                    rectNode = dispRectNode.getElementsByTagNameNS(ns, \"Rect\" )[ 0 ];\n                }\n\n                displayRects.push({\n                    Rect: {\n                        X: parseInt( rectNode.getAttribute( \"X\" ), 10 ),\n                        Y: parseInt( rectNode.getAttribute( \"Y\" ), 10 ),\n                        Width: parseInt( rectNode.getAttribute( \"Width\" ), 10 ),\n                        Height: parseInt( rectNode.getAttribute( \"Height\" ), 10 ),\n                        MinLevel: parseInt( dispRectNode.getAttribute( \"MinLevel\" ), 10 ),\n                        MaxLevel: parseInt( dispRectNode.getAttribute( \"MaxLevel\" ), 10 )\n                    }\n                });\n            }\n\n            if( displayRects.length ){\n                configuration.Image.DisplayRect = displayRects;\n            }\n\n            return configureFromObject( tileSource, configuration );\n\n        } catch ( e ) {\n            throw (e instanceof Error) ?\n                e :\n                new Error( $.getString(\"Errors.Dzi\") );\n        }\n    } else if ( rootName === \"Collection\" ) {\n        throw new Error( $.getString( \"Errors.Dzc\" ) );\n    } else if ( rootName === \"Error\" ) {\n        var messageNode = root.getElementsByTagName(\"Message\")[0];\n        var message = messageNode.firstChild.nodeValue;\n        throw new Error(message);\n    }\n\n    throw new Error( $.getString( \"Errors.Dzi\" ) );\n}\n\n/**\n * @private\n * @inner\n * @function\n */\nfunction configureFromObject( tileSource, configuration ){\n    var imageData     = configuration.Image,\n        tilesUrl      = imageData.Url,\n        fileFormat    = imageData.Format,\n        sizeData      = imageData.Size,\n        dispRectData  = imageData.DisplayRect || [],\n        width         = parseInt( sizeData.Width, 10 ),\n        height        = parseInt( sizeData.Height, 10 ),\n        tileSize      = parseInt( imageData.TileSize, 10 ),\n        tileOverlap   = parseInt( imageData.Overlap, 10 ),\n        displayRects  = [],\n        rectData,\n        i;\n\n    //TODO: need to figure out out to better handle image format compatibility\n    //      which actually includes additional file formats like xml and pdf\n    //      and plain text for various tilesource implementations to avoid low\n    //      level errors.\n    //\n    //      For now, just don't perform the check.\n    //\n    /*if ( !imageFormatSupported( fileFormat ) ) {\n        throw new Error(\n            $.getString( \"Errors.ImageFormat\", fileFormat.toUpperCase() )\n        );\n    }*/\n\n    for ( i = 0; i < dispRectData.length; i++ ) {\n        rectData = dispRectData[ i ].Rect;\n\n        displayRects.push( new $.DisplayRect(\n            parseInt( rectData.X, 10 ),\n            parseInt( rectData.Y, 10 ),\n            parseInt( rectData.Width, 10 ),\n            parseInt( rectData.Height, 10 ),\n            parseInt( rectData.MinLevel, 10 ),\n            parseInt( rectData.MaxLevel, 10 )\n        ));\n    }\n\n    return $.extend(true, {\n        width: width, /* width *required */\n        height: height, /* height *required */\n        tileSize: tileSize, /* tileSize *required */\n        tileOverlap: tileOverlap, /* tileOverlap *required */\n        minLevel: null, /* minLevel */\n        maxLevel: null, /* maxLevel */\n        tilesUrl: tilesUrl, /* tilesUrl */\n        fileFormat: fileFormat, /* fileFormat */\n        displayRects: displayRects /* displayRects */\n    }, configuration );\n\n}\n\n}( OpenSeadragon ));\n\n/*\n * OpenSeadragon - IIIFTileSource\n *\n * Copyright (C) 2009 CodePlex Foundation\n * Copyright (C) 2010-2013 OpenSeadragon contributors\n *\n * Redistribution and use in source and binary forms, with or without\n * modification, are permitted provided that the following conditions are\n * met:\n *\n * - Redistributions of source code must retain the above copyright notice,\n *   this list of conditions and the following disclaimer.\n *\n * - Redistributions in binary form must reproduce the above copyright\n *   notice, this list of conditions and the following disclaimer in the\n *   documentation and/or other materials provided with the distribution.\n *\n * - Neither the name of CodePlex Foundation nor the names of its\n *   contributors may be used to endorse or promote products derived from\n *   this software without specific prior written permission.\n *\n * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS\n * \"AS IS\" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT\n * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR\n * A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT\n * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,\n * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED\n * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR\n * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF\n * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING\n * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS\n * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.\n */\n\n(function( $ ){\n\n/**\n * @class IIIFTileSource\n * @classdesc A client implementation of the International Image Interoperability Framework\n * Format: Image API 1.0 - 2.1\n *\n * @memberof OpenSeadragon\n * @extends OpenSeadragon.TileSource\n * @see http://iiif.io/api/image/\n * @param {String} [options.tileFormat='jpg']\n *      The extension that will be used when requiring tiles.\n */\n$.IIIFTileSource = function( options ){\n\n    /* eslint-disable camelcase */\n\n    $.extend( true, this, options );\n\n    if ( !( this.height && this.width && this['@id'] ) ) {\n        throw new Error( 'IIIF required parameters not provided.' );\n    }\n\n    options.tileSizePerScaleFactor = {};\n\n    this.tileFormat = this.tileFormat || 'jpg';\n\n    this.version = options.version;\n\n    // N.B. 2.0 renamed scale_factors to scaleFactors\n    if ( this.tile_width && this.tile_height ) {\n        options.tileWidth = this.tile_width;\n        options.tileHeight = this.tile_height;\n    } else if ( this.tile_width ) {\n        options.tileSize = this.tile_width;\n    } else if ( this.tile_height ) {\n        options.tileSize = this.tile_height;\n    } else if ( this.tiles ) {\n        // Version 2.0 forwards\n        if ( this.tiles.length === 1 ) {\n            options.tileWidth  = this.tiles[0].width;\n            // Use height if provided, otherwise assume square tiles and use width.\n            options.tileHeight = this.tiles[0].height || this.tiles[0].width;\n            this.scale_factors = this.tiles[0].scaleFactors;\n        } else {\n            // Multiple tile sizes at different levels\n            this.scale_factors = [];\n            for (var t = 0; t < this.tiles.length; t++ ) {\n                for (var sf = 0; sf < this.tiles[t].scaleFactors.length; sf++) {\n                    var scaleFactor = this.tiles[t].scaleFactors[sf];\n                    this.scale_factors.push(scaleFactor);\n                    options.tileSizePerScaleFactor[scaleFactor] = {\n                        width: this.tiles[t].width,\n                        height: this.tiles[t].height || this.tiles[t].width\n                    };\n                }\n            }\n        }\n    } else if ( canBeTiled(options) ) {\n        // use the largest of tileOptions that is smaller than the short dimension\n        var shortDim = Math.min( this.height, this.width ),\n            tileOptions = [256, 512, 1024],\n            smallerTiles = [];\n\n        for ( var c = 0; c < tileOptions.length; c++ ) {\n            if ( tileOptions[c] <= shortDim ) {\n                smallerTiles.push( tileOptions[c] );\n            }\n        }\n\n        if ( smallerTiles.length > 0 ) {\n            options.tileSize = Math.max.apply( null, smallerTiles );\n        } else {\n            // If we're smaller than 256, just use the short side.\n            options.tileSize = shortDim;\n        }\n    } else if (this.sizes && this.sizes.length > 0) {\n        // This info.json can't be tiled, but we can still construct a legacy pyramid from the sizes array.\n        // In this mode, IIIFTileSource will call functions from the abstract baseTileSource or the\n        // LegacyTileSource instead of performing IIIF tiling.\n        this.emulateLegacyImagePyramid = true;\n\n        options.levels = constructLevels( this );\n        // use the largest available size to define tiles\n        $.extend( true, options, {\n            width: options.levels[ options.levels.length - 1 ].width,\n            height: options.levels[ options.levels.length - 1 ].height,\n            tileSize: Math.max( options.height, options.width ),\n            tileOverlap: 0,\n            minLevel: 0,\n            maxLevel: options.levels.length - 1\n        });\n        this.levels = options.levels;\n    } else {\n        $.console.error(\"Nothing in the info.json to construct image pyramids from\");\n    }\n\n    if (!options.maxLevel && !this.emulateLegacyImagePyramid) {\n        if (!this.scale_factors) {\n            options.maxLevel = Number(Math.ceil(Math.log(Math.max(this.width, this.height), 2)));\n        } else {\n            var maxScaleFactor = Math.max.apply(null, this.scale_factors);\n            options.maxLevel = Math.round(Math.log(maxScaleFactor) * Math.LOG2E);\n        }\n    }\n\n    $.TileSource.apply( this, [ options ] );\n};\n\n$.extend( $.IIIFTileSource.prototype, $.TileSource.prototype, /** @lends OpenSeadragon.IIIFTileSource.prototype */{\n    /**\n     * Determine if the data and/or url imply the image service is supported by\n     * this tile source.\n     * @function\n     * @param {Object|Array} data\n     * @param {String} optional - url\n     */\n\n    supports: function( data, url ) {\n        // Version 2.0 and forwards\n        if (data.protocol && data.protocol === 'http://iiif.io/api/image') {\n            return true;\n        // Version 1.1\n        } else if ( data['@context'] && (\n            data['@context'] === \"http://library.stanford.edu/iiif/image-api/1.1/context.json\" ||\n            data['@context'] === \"http://iiif.io/api/image/1/context.json\") ) {\n            // N.B. the iiif.io context is wrong, but where the representation lives so likely to be used\n            return true;\n\n        // Version 1.0\n        } else if ( data.profile &&\n            data.profile.indexOf(\"http://library.stanford.edu/iiif/image-api/compliance.html\") === 0) {\n            return true;\n        } else if ( data.identifier && data.width && data.height ) {\n            return true;\n        } else if ( data.documentElement &&\n            \"info\" === data.documentElement.tagName &&\n            \"http://library.stanford.edu/iiif/image-api/ns/\" ===\n                data.documentElement.namespaceURI) {\n            return true;\n\n        // Not IIIF\n        } else {\n            return false;\n        }\n    },\n\n    /**\n     *\n     * @function\n     * @param {Object} data - the raw configuration\n     * @param {String} url - the url configuration was retrieved from\n     * @param {String} postData - HTTP POST data in k=v&k2=v2... form or null\n     * @example <caption>IIIF 1.1 Info Looks like this</caption>\n     * {\n     *   \"@context\" : \"http://library.stanford.edu/iiif/image-api/1.1/context.json\",\n     *   \"@id\" : \"http://iiif.example.com/prefix/1E34750D-38DB-4825-A38A-B60A345E591C\",\n     *   \"width\" : 6000,\n     *   \"height\" : 4000,\n     *   \"scale_factors\" : [ 1, 2, 4 ],\n     *   \"tile_width\" : 1024,\n     *   \"tile_height\" : 1024,\n     *   \"formats\" : [ \"jpg\", \"png\" ],\n     *   \"qualities\" : [ \"native\", \"grey\" ],\n     *   \"profile\" : \"http://library.stanford.edu/iiif/image-api/1.1/compliance.html#level0\"\n     * }\n     */\n    configure: function( data, url, postData ){\n        // Try to deduce our version and fake it upwards if needed\n        if ( !$.isPlainObject(data) ) {\n            var options = configureFromXml10( data );\n            options['@context'] = \"http://iiif.io/api/image/1.0/context.json\";\n            options['@id'] = url.replace('/info.xml', '');\n            options.version = 1;\n            return options;\n        } else {\n            if ( !data['@context'] ) {\n                data['@context'] = 'http://iiif.io/api/image/1.0/context.json';\n                data['@id'] = url.replace('/info.json', '');\n                data.version = 1;\n            } else {\n                var context = data['@context'];\n                if (Array.isArray(context)) {\n                    for (var i = 0; i < context.length; i++) {\n                        if (typeof context[i] === 'string' &&\n                            ( /^http:\\/\\/iiif\\.io\\/api\\/image\\/[1-3]\\/context\\.json$/.test(context[i]) ||\n                            context[i] === 'http://library.stanford.edu/iiif/image-api/1.1/context.json' ) ) {\n                            context = context[i];\n                            break;\n                        }\n                    }\n                }\n                switch (context) {\n                    case 'http://iiif.io/api/image/1/context.json':\n                    case 'http://library.stanford.edu/iiif/image-api/1.1/context.json':\n                        data.version = 1;\n                        break;\n                    case 'http://iiif.io/api/image/2/context.json':\n                        data.version = 2;\n                        break;\n                    case 'http://iiif.io/api/image/3/context.json':\n                        data.version = 3;\n                        break;\n                    default:\n                        $.console.error('Data has a @context property which contains no known IIIF context URI.');\n                }\n            }\n            if ( !data['@id'] && data['id'] ) {\n                data['@id'] = data['id'];\n            }\n            if(data.preferredFormats) {\n                for (var f = 0; f < data.preferredFormats.length; f++ ) {\n                    if ( OpenSeadragon.imageFormatSupported(data.preferredFormats[f]) ) {\n                        data.tileFormat = data.preferredFormats[f];\n                        break;\n                    }\n                }\n            }\n            return data;\n        }\n    },\n\n    /**\n     * Return the tileWidth for the given level.\n     * @function\n     * @param {Number} level\n     */\n    getTileWidth: function( level ) {\n\n        if(this.emulateLegacyImagePyramid) {\n            return $.TileSource.prototype.getTileWidth.call(this, level);\n        }\n\n        var scaleFactor = Math.pow(2, this.maxLevel - level);\n\n        if (this.tileSizePerScaleFactor && this.tileSizePerScaleFactor[scaleFactor]) {\n            return this.tileSizePerScaleFactor[scaleFactor].width;\n        }\n        return this._tileWidth;\n    },\n\n    /**\n     * Return the tileHeight for the given level.\n     * @function\n     * @param {Number} level\n     */\n    getTileHeight: function( level ) {\n\n        if(this.emulateLegacyImagePyramid) {\n            return $.TileSource.prototype.getTileHeight.call(this, level);\n        }\n\n        var scaleFactor = Math.pow(2, this.maxLevel - level);\n\n        if (this.tileSizePerScaleFactor && this.tileSizePerScaleFactor[scaleFactor]) {\n            return this.tileSizePerScaleFactor[scaleFactor].height;\n        }\n        return this._tileHeight;\n    },\n\n    /**\n     * @function\n     * @param {Number} level\n     */\n    getLevelScale: function ( level ) {\n\n        if(this.emulateLegacyImagePyramid) {\n            var levelScale = NaN;\n            if (this.levels.length > 0 && level >= this.minLevel && level <= this.maxLevel) {\n                levelScale =\n                    this.levels[level].width /\n                    this.levels[this.maxLevel].width;\n            }\n            return levelScale;\n        }\n\n        return $.TileSource.prototype.getLevelScale.call(this, level);\n    },\n\n    /**\n     * @function\n     * @param {Number} level\n     */\n    getNumTiles: function( level ) {\n\n        if(this.emulateLegacyImagePyramid) {\n            var scale = this.getLevelScale(level);\n            if (scale) {\n                return new $.Point(1, 1);\n            } else {\n                return new $.Point(0, 0);\n            }\n        }\n\n        return $.TileSource.prototype.getNumTiles.call(this, level);\n    },\n\n\n    /**\n     * @function\n     * @param {Number} level\n     * @param {OpenSeadragon.Point} point\n     */\n    getTileAtPoint: function( level, point ) {\n\n        if(this.emulateLegacyImagePyramid) {\n            return new $.Point(0, 0);\n        }\n\n        return $.TileSource.prototype.getTileAtPoint.call(this, level, point);\n    },\n\n\n    /**\n     * Responsible for retrieving the url which will return an image for the\n     * region specified by the given x, y, and level components.\n     * @function\n     * @param {Number} level - z index\n     * @param {Number} x\n     * @param {Number} y\n     * @throws {Error}\n     */\n    getTileUrl: function( level, x, y ){\n\n        if(this.emulateLegacyImagePyramid) {\n            var url = null;\n            if ( this.levels.length > 0 && level >= this.minLevel && level <= this.maxLevel ) {\n                url = this.levels[ level ].url;\n            }\n            return url;\n        }\n\n        //# constants\n        var IIIF_ROTATION = '0',\n            //## get the scale (level as a decimal)\n            scale = Math.pow( 0.5, this.maxLevel - level ),\n\n            //# image dimensions at this level\n            levelWidth = Math.ceil( this.width * scale ),\n            levelHeight = Math.ceil( this.height * scale ),\n\n            //## iiif region\n            tileWidth,\n            tileHeight,\n            iiifTileSizeWidth,\n            iiifTileSizeHeight,\n            iiifRegion,\n            iiifTileX,\n            iiifTileY,\n            iiifTileW,\n            iiifTileH,\n            iiifSize,\n            iiifSizeW,\n            iiifSizeH,\n            iiifQuality,\n            uri;\n\n        tileWidth = this.getTileWidth(level);\n        tileHeight = this.getTileHeight(level);\n        iiifTileSizeWidth = Math.ceil( tileWidth / scale );\n        iiifTileSizeHeight = Math.ceil( tileHeight / scale );\n        if (this.version === 1) {\n            iiifQuality = \"native.\" + this.tileFormat;\n        } else {\n            iiifQuality = \"default.\" + this.tileFormat;\n        }\n        if ( levelWidth < tileWidth && levelHeight < tileHeight ){\n            if ( this.version === 2 && levelWidth === this.width ) {\n                iiifSize = \"full\";\n            } else if ( this.version === 3 && levelWidth === this.width && levelHeight === this.height ) {\n                iiifSize = \"max\";\n            } else if ( this.version === 3 ) {\n                iiifSize = levelWidth + \",\" + levelHeight;\n            } else {\n                iiifSize = levelWidth + \",\";\n            }\n            iiifRegion = 'full';\n        } else {\n            iiifTileX = x * iiifTileSizeWidth;\n            iiifTileY = y * iiifTileSizeHeight;\n            iiifTileW = Math.min( iiifTileSizeWidth, this.width - iiifTileX );\n            iiifTileH = Math.min( iiifTileSizeHeight, this.height - iiifTileY );\n            if ( x === 0 && y === 0 && iiifTileW === this.width && iiifTileH === this.height ) {\n                iiifRegion = \"full\";\n            } else {\n                iiifRegion = [ iiifTileX, iiifTileY, iiifTileW, iiifTileH ].join( ',' );\n            }\n            iiifSizeW = Math.ceil( iiifTileW * scale );\n            iiifSizeH = Math.ceil( iiifTileH * scale );\n            if ( this.version === 2 && iiifSizeW === this.width ) {\n                iiifSize = \"full\";\n            } else if ( this.version === 3 && iiifSizeW === this.width && iiifSizeH === this.height ) {\n                iiifSize = \"max\";\n            } else if (this.version === 3) {\n                iiifSize = iiifSizeW + \",\" + iiifSizeH;\n            } else {\n                iiifSize = iiifSizeW + \",\";\n            }\n        }\n        uri = [ this['@id'], iiifRegion, iiifSize, IIIF_ROTATION, iiifQuality ].join( '/' );\n\n        return uri;\n    },\n\n    __testonly__: {\n        canBeTiled: canBeTiled,\n        constructLevels: constructLevels\n    }\n\n  });\n\n    /**\n     * Determine whether arbitrary tile requests can be made against a service with the given profile\n     * @function\n     * @param {Object} options\n     * @param {Array|String} options.profile\n     * @param {Number} options.version\n     * @param {String} options.extraFeatures\n     * @returns {Boolean}\n     */\n    function canBeTiled ( options ) {\n        var level0Profiles = [\n            \"http://library.stanford.edu/iiif/image-api/compliance.html#level0\",\n            \"http://library.stanford.edu/iiif/image-api/1.1/compliance.html#level0\",\n            \"http://iiif.io/api/image/2/level0.json\",\n            \"level0\",\n            \"https://iiif.io/api/image/3/level0.json\"\n        ];\n        var profileLevel = Array.isArray(options.profile) ? options.profile[0] : options.profile;\n        var isLevel0 = (level0Profiles.indexOf(profileLevel) !== -1);\n        var hasCanoncicalSizeFeature = false;\n        if ( options.version === 2 && options.profile.length > 1 && options.profile[1].supports ) {\n            hasCanoncicalSizeFeature = options.profile[1].supports.indexOf( \"sizeByW\" ) !== -1;\n        }\n        if ( options.version === 3 && options.extraFeatures ) {\n            hasCanoncicalSizeFeature = options.extraFeatures.indexOf( \"sizeByWh\" ) !== -1;\n        }\n        return !isLevel0 || hasCanoncicalSizeFeature;\n    }\n\n    /**\n     * Build the legacy pyramid URLs (one tile per level)\n     * @function\n     * @param {object} options - infoJson\n     * @throws {Error}\n     */\n    function constructLevels(options) {\n        var levels = [];\n        for(var i = 0; i < options.sizes.length; i++) {\n            levels.push({\n                url: options['@id'] + '/full/' + options.sizes[i].width + ',' +\n                    (options.version === 3 ? options.sizes[i].height : '') +\n                    '/0/default.' + options.tileFormat,\n                width: options.sizes[i].width,\n                height: options.sizes[i].height\n            });\n        }\n        return levels.sort(function(a, b) {\n            return a.width - b.width;\n        });\n    }\n\n\n    function configureFromXml10(xmlDoc) {\n        //parse the xml\n        if ( !xmlDoc || !xmlDoc.documentElement ) {\n            throw new Error( $.getString( \"Errors.Xml\" ) );\n        }\n\n        var root            = xmlDoc.documentElement,\n            rootName        = root.tagName,\n            configuration   = null;\n\n        if ( rootName === \"info\" ) {\n            try {\n                configuration = {};\n                parseXML10( root, configuration );\n                return configuration;\n\n            } catch ( e ) {\n                throw (e instanceof Error) ?\n                    e :\n                    new Error( $.getString(\"Errors.IIIF\") );\n            }\n        }\n        throw new Error( $.getString( \"Errors.IIIF\" ) );\n    }\n\n    function parseXML10( node, configuration, property ) {\n        var i,\n            value;\n        if ( node.nodeType === 3 && property ) {//text node\n            value = node.nodeValue.trim();\n            if( value.match(/^\\d*$/)){\n                value = Number( value );\n            }\n            if( !configuration[ property ] ){\n                configuration[ property ] = value;\n            }else{\n                if( !$.isArray( configuration[ property ] ) ){\n                    configuration[ property ] = [ configuration[ property ] ];\n                }\n                configuration[ property ].push( value );\n            }\n        } else if( node.nodeType === 1 ){\n            for( i = 0; i < node.childNodes.length; i++ ){\n                parseXML10( node.childNodes[ i ], configuration, node.nodeName );\n            }\n        }\n    }\n\n\n\n}( OpenSeadragon ));\n\n/*\n * OpenSeadragon - OsmTileSource\n *\n * Copyright (C) 2009 CodePlex Foundation\n * Copyright (C) 2010-2013 OpenSeadragon contributors\n *\n * Redistribution and use in source and binary forms, with or without\n * modification, are permitted provided that the following conditions are\n * met:\n *\n * - Redistributions of source code must retain the above copyright notice,\n *   this list of conditions and the following disclaimer.\n *\n * - Redistributions in binary form must reproduce the above copyright\n *   notice, this list of conditions and the following disclaimer in the\n *   documentation and/or other materials provided with the distribution.\n *\n * - Neither the name of CodePlex Foundation nor the names of its\n *   contributors may be used to endorse or promote products derived from\n *   this software without specific prior written permission.\n *\n * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS\n * \"AS IS\" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT\n * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR\n * A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT\n * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,\n * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED\n * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR\n * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF\n * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING\n * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS\n * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.\n */\n\n/*\n * Derived from the OSM tile source in Rainer Simon's seajax-utils project\n * <http://github.com/rsimon/seajax-utils>.  Rainer Simon has contributed\n * the included code to the OpenSeadragon project under the New BSD license;\n * see <https://github.com/openseadragon/openseadragon/issues/58>.\n */\n\n\n(function( $ ){\n\n/**\n * @class OsmTileSource\n * @classdesc A tilesource implementation for OpenStreetMap.<br><br>\n *\n * Note 1. Zoomlevels. Deep Zoom and OSM define zoom levels differently. In  Deep\n * Zoom, level 0 equals an image of 1x1 pixels. In OSM, level 0 equals an image of\n * 256x256 levels (see http://gasi.ch/blog/inside-deep-zoom-2). I.e. there is a\n * difference of log2(256)=8 levels.<br><br>\n *\n * Note 2. Image dimension. According to the OSM Wiki\n * (http://wiki.openstreetmap.org/wiki/Slippy_map_tilenames#Zoom_levels)\n * the highest Mapnik zoom level has 256.144x256.144 tiles, with a 256x256\n * pixel size. I.e. the Deep Zoom image dimension is 65.572.864x65.572.864\n * pixels.\n *\n * @memberof OpenSeadragon\n * @extends OpenSeadragon.TileSource\n * @param {Number|Object} width - the pixel width of the image or the idiomatic\n *      options object which is used instead of positional arguments.\n * @param {Number} height\n * @param {Number} tileSize\n * @param {Number} tileOverlap\n * @param {String} tilesUrl\n */\n$.OsmTileSource = function( width, height, tileSize, tileOverlap, tilesUrl ) {\n    var options;\n\n    if( $.isPlainObject( width ) ){\n        options = width;\n    }else{\n        options = {\n            width: arguments[0],\n            height: arguments[1],\n            tileSize: arguments[2],\n            tileOverlap: arguments[3],\n            tilesUrl: arguments[4]\n        };\n    }\n    //apply default setting for standard public OpenStreatMaps service\n    //but allow them to be specified so fliks can host there own instance\n    //or apply against other services supportting the same standard\n    if( !options.width || !options.height ){\n        options.width = 65572864;\n        options.height = 65572864;\n    }\n    if( !options.tileSize ){\n        options.tileSize = 256;\n        options.tileOverlap = 0;\n    }\n    if( !options.tilesUrl ){\n        options.tilesUrl = \"http://tile.openstreetmap.org/\";\n    }\n    options.minLevel = 8;\n\n    $.TileSource.apply( this, [ options ] );\n\n};\n\n$.extend( $.OsmTileSource.prototype, $.TileSource.prototype, /** @lends OpenSeadragon.OsmTileSource.prototype */{\n\n\n    /**\n     * Determine if the data and/or url imply the image service is supported by\n     * this tile source.\n     * @function\n     * @param {Object|Array} data\n     * @param {String} optional - url\n     */\n    supports: function( data, url ){\n        return (\n            data.type &&\n            \"openstreetmaps\" === data.type\n        );\n    },\n\n    /**\n     *\n     * @function\n     * @param {Object} data - the raw configuration\n     * @param {String} url - the url the data was retrieved from if any.\n     * @param {String} postData - HTTP POST data in k=v&k2=v2... form or null\n     * @return {Object} options - A dictionary of keyword arguments sufficient\n     *      to configure this tile sources constructor.\n     */\n    configure: function( data, url, postData ){\n        return data;\n    },\n\n\n    /**\n     * @function\n     * @param {Number} level\n     * @param {Number} x\n     * @param {Number} y\n     */\n    getTileUrl: function( level, x, y ) {\n        return this.tilesUrl + (level - 8) + \"/\" + x + \"/\" + y + \".png\";\n    }\n});\n\n\n}( OpenSeadragon ));\n\n/*\n * OpenSeadragon - TmsTileSource\n *\n * Copyright (C) 2009 CodePlex Foundation\n * Copyright (C) 2010-2013 OpenSeadragon contributors\n *\n * Redistribution and use in source and binary forms, with or without\n * modification, are permitted provided that the following conditions are\n * met:\n *\n * - Redistributions of source code must retain the above copyright notice,\n *   this list of conditions and the following disclaimer.\n *\n * - Redistributions in binary form must reproduce the above copyright\n *   notice, this list of conditions and the following disclaimer in the\n *   documentation and/or other materials provided with the distribution.\n *\n * - Neither the name of CodePlex Foundation nor the names of its\n *   contributors may be used to endorse or promote products derived from\n *   this software without specific prior written permission.\n *\n * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS\n * \"AS IS\" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT\n * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR\n * A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT\n * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,\n * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED\n * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR\n * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF\n * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING\n * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS\n * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.\n */\n\n/*\n * Derived from the TMS tile source in Rainer Simon's seajax-utils project\n * <http://github.com/rsimon/seajax-utils>.  Rainer Simon has contributed\n * the included code to the OpenSeadragon project under the New BSD license;\n * see <https://github.com/openseadragon/openseadragon/issues/58>.\n */\n\n\n(function( $ ){\n\n/**\n * @class TmsTileSource\n * @classdesc A tilesource implementation for Tiled Map Services (TMS).\n * TMS tile scheme ( [ as supported by OpenLayers ] is described here\n * ( http://openlayers.org/dev/examples/tms.html ).\n *\n * @memberof OpenSeadragon\n * @extends OpenSeadragon.TileSource\n * @param {Number|Object} width - the pixel width of the image or the idiomatic\n *      options object which is used instead of positional arguments.\n * @param {Number} height\n * @param {Number} tileSize\n * @param {Number} tileOverlap\n * @param {String} tilesUrl\n */\n$.TmsTileSource = function( width, height, tileSize, tileOverlap, tilesUrl ) {\n    var options;\n\n    if( $.isPlainObject( width ) ){\n        options = width;\n    }else{\n        options = {\n            width: arguments[0],\n            height: arguments[1],\n            tileSize: arguments[2],\n            tileOverlap: arguments[3],\n            tilesUrl: arguments[4]\n        };\n    }\n    // TMS has integer multiples of 256 for width/height and adds buffer\n    // if necessary -> account for this!\n    var bufferedWidth = Math.ceil(options.width / 256) * 256,\n        bufferedHeight = Math.ceil(options.height / 256) * 256,\n        max;\n\n    // Compute number of zoomlevels in this tileset\n    if (bufferedWidth > bufferedHeight) {\n        max = bufferedWidth / 256;\n    } else {\n        max = bufferedHeight / 256;\n    }\n    options.maxLevel = Math.ceil(Math.log(max) / Math.log(2)) - 1;\n    options.tileSize = 256;\n    options.width = bufferedWidth;\n    options.height = bufferedHeight;\n\n    $.TileSource.apply( this, [ options ] );\n\n};\n\n$.extend( $.TmsTileSource.prototype, $.TileSource.prototype, /** @lends OpenSeadragon.TmsTileSource.prototype */{\n\n\n    /**\n     * Determine if the data and/or url imply the image service is supported by\n     * this tile source.\n     * @function\n     * @param {Object|Array} data\n     * @param {String} optional - url\n     */\n    supports: function( data, url ){\n        return ( data.type && \"tiledmapservice\" === data.type );\n    },\n\n    /**\n     *\n     * @function\n     * @param {Object} data - the raw configuration\n     * @param {String} url - the url the data was retrieved from if any.\n     * @param {String} postData - HTTP POST data in k=v&k2=v2... form or null\n     * @return {Object} options - A dictionary of keyword arguments sufficient\n     *      to configure this tile sources constructor.\n     */\n    configure: function( data, url, postData ){\n        return data;\n    },\n\n\n    /**\n     * @function\n     * @param {Number} level\n     * @param {Number} x\n     * @param {Number} y\n     */\n    getTileUrl: function( level, x, y ) {\n        // Convert from Deep Zoom definition to TMS zoom definition\n        var yTiles = this.getNumTiles( level ).y - 1;\n\n        return this.tilesUrl + level + \"/\" + x + \"/\" + (yTiles - y) + \".png\";\n    }\n});\n\n\n}( OpenSeadragon ));\n\n(function($) {\n\n    /**\n     * @class ZoomifyTileSource\n     * @classdesc A tilesource implementation for the zoomify format.\n     *\n     * A description of the format can be found here:\n     * https://ecommons.cornell.edu/bitstream/handle/1813/5410/Introducing_Zoomify_Image.pdf\n     *\n     * There are two ways of creating a zoomify tilesource for openseadragon\n     *\n     * 1) Supplying all necessary information in the tilesource object. A minimal example object for this method looks like this:\n     *\n     * {\n     *      type: \"zoomifytileservice\",\n     *      width: 1000,\n     *      height: 1000,\n     *      tilesUrl: \"/test/data/zoomify/\"\n     * }\n     *\n     * The tileSize is set to 256 (the usual Zoomify default) when it is not defined. The tileUrl must the path to the image _directory_.\n     *\n     * 2) Loading image metadata from xml file: (CURRENTLY NOT SUPPORTED)\n     *\n     * When creating zoomify formatted images one \"xml\" like file with name ImageProperties.xml\n     * will be created as well. Here is an example of such a file:\n     *\n     * <IMAGE_PROPERTIES WIDTH=\"1000\" HEIGHT=\"1000\" NUMTILES=\"21\" NUMIMAGES=\"1\" VERSION=\"1.8\" TILESIZE=\"256\" />\n     *\n     * To use this xml file as metadata source you must supply the path to the ImageProperties.xml file and leave out all other parameters:\n     * As stated above, this method of loading a zoomify tilesource is currently not supported\n     *\n     * {\n     *      type: \"zoomifytileservice\",\n     *      tilesUrl: \"/test/data/zoomify/ImageProperties.xml\"\n     * }\n\n    *\n    * @memberof OpenSeadragon\n     * @extends OpenSeadragon.TileSource\n     * @param {Number} width - the pixel width of the image.\n     * @param {Number} height\n     * @param {Number} tileSize\n     * @param {String} tilesUrl\n     */\n    $.ZoomifyTileSource = function(options) {\n        if(typeof options.tileSize === 'undefined'){\n            options.tileSize = 256;\n        }\n\n        if(typeof options.fileFormat === 'undefined'){\n            options.fileFormat = 'jpg';\n            this.fileFormat = options.fileFormat;\n        }\n\n        var currentImageSize = {\n            x: options.width,\n            y: options.height\n        };\n        options.imageSizes = [{\n            x: options.width,\n            y: options.height\n        }];\n        options.gridSize = [this._getGridSize(options.width, options.height, options.tileSize)];\n\n        while (parseInt(currentImageSize.x, 10) > options.tileSize || parseInt(currentImageSize.y, 10) > options.tileSize) {\n            currentImageSize.x = Math.floor(currentImageSize.x / 2);\n            currentImageSize.y = Math.floor(currentImageSize.y / 2);\n            options.imageSizes.push({\n                x: currentImageSize.x,\n                y: currentImageSize.y\n            });\n            options.gridSize.push(this._getGridSize(currentImageSize.x, currentImageSize.y, options.tileSize));\n        }\n        options.imageSizes.reverse();\n        options.gridSize.reverse();\n        options.minLevel = 0;\n        options.maxLevel = options.gridSize.length - 1;\n\n        OpenSeadragon.TileSource.apply(this, [options]);\n    };\n\n    $.extend($.ZoomifyTileSource.prototype, $.TileSource.prototype, /** @lends OpenSeadragon.ZoomifyTileSource.prototype */ {\n\n        //private\n        _getGridSize: function(width, height, tileSize) {\n            return {\n                x: Math.ceil(width / tileSize),\n                y: Math.ceil(height / tileSize)\n            };\n        },\n\n        //private\n        _calculateAbsoluteTileNumber: function(level, x, y) {\n            var num = 0;\n            var size = {};\n\n            //Sum up all tiles below the level we want the number of tiles\n            for (var z = 0; z < level; z++) {\n                size = this.gridSize[z];\n                num += size.x * size.y;\n            }\n            //Add the tiles of the level\n            size = this.gridSize[level];\n            num += size.x * y + x;\n            return num;\n        },\n\n        /**\n         * Determine if the data and/or url imply the image service is supported by\n         * this tile source.\n         * @function\n         * @param {Object|Array} data\n         * @param {String} optional - url\n         */\n        supports: function(data, url) {\n            return (data.type && \"zoomifytileservice\" === data.type);\n        },\n\n        /**\n         *\n         * @function\n         * @param {Object} data - the raw configuration\n         * @param {String} url - the url the data was retrieved from if any.\n         * @param {String} postData - HTTP POST data in k=v&k2=v2... form or null\n         * @return {Object} options - A dictionary of keyword arguments sufficient\n         *      to configure this tile sources constructor.\n         */\n        configure: function(data, url, postData) {\n            return data;\n        },\n\n        /**\n         * @function\n         * @param {Number} level\n         * @param {Number} x\n         * @param {Number} y\n         */\n        getTileUrl: function(level, x, y) {\n            //console.log(level);\n            var result = 0;\n            var num = this._calculateAbsoluteTileNumber(level, x, y);\n            result = Math.floor(num / 256);\n            return this.tilesUrl + 'TileGroup' + result + '/' + level + '-' + x + '-' + y + '.' + this.fileFormat;\n\n        }\n    });\n\n}(OpenSeadragon));\n\n\n/*\n * OpenSeadragon - LegacyTileSource\n *\n * Copyright (C) 2009 CodePlex Foundation\n * Copyright (C) 2010-2013 OpenSeadragon contributors\n *\n * Redistribution and use in source and binary forms, with or without\n * modification, are permitted provided that the following conditions are\n * met:\n *\n * - Redistributions of source code must retain the above copyright notice,\n *   this list of conditions and the following disclaimer.\n *\n * - Redistributions in binary form must reproduce the above copyright\n *   notice, this list of conditions and the following disclaimer in the\n *   documentation and/or other materials provided with the distribution.\n *\n * - Neither the name of CodePlex Foundation nor the names of its\n *   contributors may be used to endorse or promote products derived from\n *   this software without specific prior written permission.\n *\n * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS\n * \"AS IS\" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT\n * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR\n * A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT\n * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,\n * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED\n * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR\n * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF\n * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING\n * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS\n * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.\n */\n\n(function( $ ){\n\n/**\n * @class LegacyTileSource\n * @classdesc The LegacyTileSource allows simple, traditional image pyramids to be loaded\n * into an OpenSeadragon Viewer.  Basically, this translates to the historically\n * common practice of starting with a 'master' image, maybe a tiff for example,\n * and generating a set of 'service' images like one or more thumbnails, a medium\n * resolution image and a high resolution image in standard web formats like\n * png or jpg.\n *\n * @memberof OpenSeadragon\n * @extends OpenSeadragon.TileSource\n * @param {Array} levels An array of file descriptions, each is an object with\n *      a 'url', a 'width', and a 'height'.  Overriding classes can expect more\n *      properties but these properties are sufficient for this implementation.\n *      Additionally, the levels are required to be listed in order from\n *      smallest to largest.\n * @property {Number} aspectRatio\n * @property {Number} dimensions\n * @property {Number} tileSize\n * @property {Number} tileOverlap\n * @property {Number} minLevel\n * @property {Number} maxLevel\n * @property {Array}  levels\n */\n$.LegacyTileSource = function( levels ) {\n\n    var options,\n        width,\n        height;\n\n    if( $.isArray( levels ) ){\n        options = {\n            type: 'legacy-image-pyramid',\n            levels: levels\n        };\n    }\n\n    //clean up the levels to make sure we support all formats\n    options.levels = filterFiles( options.levels );\n\n    if ( options.levels.length > 0 ) {\n        width = options.levels[ options.levels.length - 1 ].width;\n        height = options.levels[ options.levels.length - 1 ].height;\n    }\n    else {\n        width = 0;\n        height = 0;\n        $.console.error( \"No supported image formats found\" );\n    }\n\n    $.extend( true, options, {\n        width: width,\n        height: height,\n        tileSize: Math.max( height, width ),\n        tileOverlap: 0,\n        minLevel: 0,\n        maxLevel: options.levels.length > 0 ? options.levels.length - 1 : 0\n    } );\n\n    $.TileSource.apply( this, [ options ] );\n\n    this.levels = options.levels;\n};\n\n$.extend( $.LegacyTileSource.prototype, $.TileSource.prototype, /** @lends OpenSeadragon.LegacyTileSource.prototype */{\n    /**\n     * Determine if the data and/or url imply the image service is supported by\n     * this tile source.\n     * @function\n     * @param {Object|Array} data\n     * @param {String} optional - url\n     */\n    supports: function( data, url ){\n        return (\n            data.type &&\n            \"legacy-image-pyramid\" === data.type\n        ) || (\n            data.documentElement &&\n            \"legacy-image-pyramid\" === data.documentElement.getAttribute('type')\n        );\n    },\n\n\n    /**\n     *\n     * @function\n     * @param {Object|XMLDocument} configuration - the raw configuration\n     * @param {String} dataUrl - the url the data was retrieved from if any.\n     * @param {String} postData - HTTP POST data in k=v&k2=v2... form or null\n     * @return {Object} options - A dictionary of keyword arguments sufficient\n     *      to configure this tile sources constructor.\n     */\n    configure: function( configuration, dataUrl, postData ){\n\n        var options;\n\n        if( !$.isPlainObject(configuration) ){\n\n            options = configureFromXML( this, configuration );\n\n        }else{\n\n            options = configureFromObject( this, configuration );\n        }\n\n        return options;\n\n    },\n\n    /**\n     * @function\n     * @param {Number} level\n     */\n    getLevelScale: function ( level ) {\n        var levelScale = NaN;\n        if ( this.levels.length > 0 && level >= this.minLevel && level <= this.maxLevel ) {\n            levelScale =\n                this.levels[ level ].width /\n                this.levels[ this.maxLevel ].width;\n        }\n        return levelScale;\n    },\n\n    /**\n     * @function\n     * @param {Number} level\n     */\n    getNumTiles: function( level ) {\n        var scale = this.getLevelScale( level );\n        if ( scale ){\n            return new $.Point( 1, 1 );\n        } else {\n            return new $.Point( 0, 0 );\n        }\n    },\n\n    /**\n     * This method is not implemented by this class other than to throw an Error\n     * announcing you have to implement it.  Because of the variety of tile\n     * server technologies, and various specifications for building image\n     * pyramids, this method is here to allow easy integration.\n     * @function\n     * @param {Number} level\n     * @param {Number} x\n     * @param {Number} y\n     * @throws {Error}\n     */\n    getTileUrl: function ( level, x, y ) {\n        var url = null;\n        if ( this.levels.length > 0 && level >= this.minLevel && level <= this.maxLevel ) {\n            url = this.levels[ level ].url;\n        }\n        return url;\n    }\n} );\n\n/**\n * This method removes any files from the Array which don't conform to our\n * basic requirements for a 'level' in the LegacyTileSource.\n * @private\n * @inner\n * @function\n */\nfunction filterFiles( files ){\n    var filtered = [],\n        file,\n        i;\n    for( i = 0; i < files.length; i++ ){\n        file = files[ i ];\n        if( file.height &&\n            file.width &&\n            file.url ){\n            //This is sufficient to serve as a level\n            filtered.push({\n                url: file.url,\n                width: Number( file.width ),\n                height: Number( file.height )\n            });\n        }\n        else {\n            $.console.error( 'Unsupported image format: %s', file.url ? file.url : '<no URL>' );\n        }\n    }\n\n    return filtered.sort(function(a, b) {\n        return a.height - b.height;\n    });\n\n}\n\n/**\n * @private\n * @inner\n * @function\n */\nfunction configureFromXML( tileSource, xmlDoc ){\n\n    if ( !xmlDoc || !xmlDoc.documentElement ) {\n        throw new Error( $.getString( \"Errors.Xml\" ) );\n    }\n\n    var root         = xmlDoc.documentElement,\n        rootName     = root.tagName,\n        conf         = null,\n        levels       = [],\n        level,\n        i;\n\n    if ( rootName === \"image\" ) {\n\n        try {\n            conf = {\n                type:        root.getAttribute( \"type\" ),\n                levels:      []\n            };\n\n            levels = root.getElementsByTagName( \"level\" );\n            for ( i = 0; i < levels.length; i++ ) {\n                level = levels[ i ];\n\n                conf.levels.push({\n                    url:    level.getAttribute( \"url\" ),\n                    width:  parseInt( level.getAttribute( \"width\" ), 10 ),\n                    height: parseInt( level.getAttribute( \"height\" ), 10 )\n                });\n            }\n\n            return configureFromObject( tileSource, conf );\n\n        } catch ( e ) {\n            throw (e instanceof Error) ?\n                e :\n                new Error( 'Unknown error parsing Legacy Image Pyramid XML.' );\n        }\n    } else if ( rootName === \"collection\" ) {\n        throw new Error( 'Legacy Image Pyramid Collections not yet supported.' );\n    } else if ( rootName === \"error\" ) {\n        throw new Error( 'Error: ' + xmlDoc );\n    }\n\n    throw new Error( 'Unknown element ' + rootName );\n}\n\n/**\n * @private\n * @inner\n * @function\n */\nfunction configureFromObject( tileSource, configuration ){\n\n    return configuration.levels;\n\n}\n\n}( OpenSeadragon ));\n\n/*\n * OpenSeadragon - ImageTileSource\n *\n * Copyright (C) 2009 CodePlex Foundation\n * Copyright (C) 2010-2013 OpenSeadragon contributors\n *\n * Redistribution and use in source and binary forms, with or without\n * modification, are permitted provided that the following conditions are\n * met:\n *\n * - Redistributions of source code must retain the above copyright notice,\n *   this list of conditions and the following disclaimer.\n *\n * - Redistributions in binary form must reproduce the above copyright\n *   notice, this list of conditions and the following disclaimer in the\n *   documentation and/or other materials provided with the distribution.\n *\n * - Neither the name of CodePlex Foundation nor the names of its\n *   contributors may be used to endorse or promote products derived from\n *   this software without specific prior written permission.\n *\n * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS\n * \"AS IS\" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT\n * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR\n * A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT\n * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,\n * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED\n * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR\n * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF\n * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING\n * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS\n * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.\n */\n\n(function ($) {\n\n    /**\n     * @class ImageTileSource\n     * @classdesc The ImageTileSource allows a simple image to be loaded\n     * into an OpenSeadragon Viewer.\n     * There are 2 ways to open an ImageTileSource:\n     * 1. viewer.open({type: 'image', url: fooUrl});\n     * 2. viewer.open(new OpenSeadragon.ImageTileSource({url: fooUrl}));\n     *\n     * With the first syntax, the crossOriginPolicy, ajaxWithCredentials and\n     * useCanvas options are inherited from the viewer if they are not\n     * specified directly in the options object.\n     *\n     * @memberof OpenSeadragon\n     * @extends OpenSeadragon.TileSource\n     * @param {Object} options Options object.\n     * @param {String} options.url URL of the image\n     * @param {Boolean} [options.buildPyramid=true] If set to true (default), a\n     * pyramid will be built internally to provide a better downsampling.\n     * @param {String|Boolean} [options.crossOriginPolicy=false] Valid values are\n     * 'Anonymous', 'use-credentials', and false. If false, image requests will\n     * not use CORS preventing internal pyramid building for images from other\n     * domains.\n     * @param {String|Boolean} [options.ajaxWithCredentials=false] Whether to set\n     * the withCredentials XHR flag for AJAX requests (when loading tile sources).\n     * @param {Boolean} [options.useCanvas=true] Set to false to prevent any use\n     * of the canvas API.\n     */\n    $.ImageTileSource = function (options) {\n\n        options = $.extend({\n            buildPyramid: true,\n            crossOriginPolicy: false,\n            ajaxWithCredentials: false,\n            useCanvas: true\n        }, options);\n        $.TileSource.apply(this, [options]);\n\n    };\n\n    $.extend($.ImageTileSource.prototype, $.TileSource.prototype, /** @lends OpenSeadragon.ImageTileSource.prototype */{\n        /**\n         * Determine if the data and/or url imply the image service is supported by\n         * this tile source.\n         * @function\n         * @param {Object|Array} data\n         * @param {String} optional - url\n         */\n        supports: function (data, url) {\n            return data.type && data.type === \"image\";\n        },\n        /**\n         *\n         * @function\n         * @param {Object} options - the options\n         * @param {String} dataUrl - the url the image was retrieved from, if any.\n         * @param {String} postData - HTTP POST data in k=v&k2=v2... form or null\n         * @return {Object} options - A dictionary of keyword arguments sufficient\n         *      to configure this tile sources constructor.\n         */\n        configure: function (options, dataUrl, postData) {\n            return options;\n        },\n        /**\n         * Responsible for retrieving, and caching the\n         * image metadata pertinent to this TileSources implementation.\n         * @function\n         * @param {String} url\n         * @throws {Error}\n         */\n        getImageInfo: function (url) {\n            var image = this._image = new Image();\n            var _this = this;\n\n            if (this.crossOriginPolicy) {\n                image.crossOrigin = this.crossOriginPolicy;\n            }\n            if (this.ajaxWithCredentials) {\n                image.useCredentials = this.ajaxWithCredentials;\n            }\n\n            $.addEvent(image, 'load', function () {\n                _this.width = image.naturalWidth;\n                _this.height = image.naturalHeight;\n                _this.aspectRatio = _this.width / _this.height;\n                _this.dimensions = new $.Point(_this.width, _this.height);\n                _this._tileWidth = _this.width;\n                _this._tileHeight = _this.height;\n                _this.tileOverlap = 0;\n                _this.minLevel = 0;\n                _this.levels = _this._buildLevels();\n                _this.maxLevel = _this.levels.length - 1;\n\n                _this.ready = true;\n\n                // Note: this event is documented elsewhere, in TileSource\n                _this.raiseEvent('ready', {tileSource: _this});\n            });\n\n            $.addEvent(image, 'error', function () {\n                // Note: this event is documented elsewhere, in TileSource\n                _this.raiseEvent('open-failed', {\n                    message: \"Error loading image at \" + url,\n                    source: url\n                });\n            });\n\n            image.src = url;\n        },\n        /**\n         * @function\n         * @param {Number} level\n         */\n        getLevelScale: function (level) {\n            var levelScale = NaN;\n            if (level >= this.minLevel && level <= this.maxLevel) {\n                levelScale =\n                        this.levels[level].width /\n                        this.levels[this.maxLevel].width;\n            }\n            return levelScale;\n        },\n        /**\n         * @function\n         * @param {Number} level\n         */\n        getNumTiles: function (level) {\n            var scale = this.getLevelScale(level);\n            if (scale) {\n                return new $.Point(1, 1);\n            } else {\n                return new $.Point(0, 0);\n            }\n        },\n        /**\n         * Retrieves a tile url\n         * @function\n         * @param {Number} level Level of the tile\n         * @param {Number} x x coordinate of the tile\n         * @param {Number} y y coordinate of the tile\n         */\n        getTileUrl: function (level, x, y) {\n            var url = null;\n            if (level >= this.minLevel && level <= this.maxLevel) {\n                url = this.levels[level].url;\n            }\n            return url;\n        },\n        /**\n         * Retrieves a tile context 2D\n         * @function\n         * @param {Number} level Level of the tile\n         * @param {Number} x x coordinate of the tile\n         * @param {Number} y y coordinate of the tile\n         */\n        getContext2D: function (level, x, y) {\n            var context = null;\n            if (level >= this.minLevel && level <= this.maxLevel) {\n                context = this.levels[level].context2D;\n            }\n            return context;\n        },\n        /**\n         * Destroys ImageTileSource\n         * @function\n         */\n        destroy: function () {\n            this._freeupCanvasMemory();\n        },\n\n        // private\n        //\n        // Builds the different levels of the pyramid if possible\n        // (i.e. if canvas API enabled and no canvas tainting issue).\n        _buildLevels: function () {\n            var levels = [{\n                    url: this._image.src,\n                    width: this._image.naturalWidth,\n                    height:  this._image.naturalHeight\n                }];\n\n            if (!this.buildPyramid || !$.supportsCanvas || !this.useCanvas) {\n                // We don't need the image anymore. Allows it to be GC.\n                delete this._image;\n                return levels;\n            }\n\n            var currentWidth = this._image.naturalWidth;\n            var currentHeight = this._image.naturalHeight;\n\n\n            var bigCanvas = document.createElement(\"canvas\");\n            var bigContext = bigCanvas.getContext(\"2d\");\n\n            bigCanvas.width = currentWidth;\n            bigCanvas.height = currentHeight;\n            bigContext.drawImage(this._image, 0, 0, currentWidth, currentHeight);\n            // We cache the context of the highest level because the browser\n            // is a lot faster at downsampling something it already has\n            // downsampled before.\n            levels[0].context2D = bigContext;\n            // We don't need the image anymore. Allows it to be GC.\n            delete this._image;\n\n            if ($.isCanvasTainted(bigCanvas)) {\n                // If the canvas is tainted, we can't compute the pyramid.\n                return levels;\n            }\n\n            // We build smaller levels until either width or height becomes\n            // 1 pixel wide.\n            while (currentWidth >= 2 && currentHeight >= 2) {\n                currentWidth = Math.floor(currentWidth / 2);\n                currentHeight = Math.floor(currentHeight / 2);\n                var smallCanvas = document.createElement(\"canvas\");\n                var smallContext = smallCanvas.getContext(\"2d\");\n                smallCanvas.width = currentWidth;\n                smallCanvas.height = currentHeight;\n                smallContext.drawImage(bigCanvas, 0, 0, currentWidth, currentHeight);\n\n                levels.splice(0, 0, {\n                    context2D: smallContext,\n                    width: currentWidth,\n                    height: currentHeight\n                });\n\n                bigCanvas = smallCanvas;\n                bigContext = smallContext;\n            }\n            return levels;\n        },\n        /**\n         * Free up canvas memory\n         * (iOS 12 or higher on 2GB RAM device has only 224MB canvas memory,\n         * and Safari keeps canvas until its height and width will be set to 0).\n         * @function\n         */\n        _freeupCanvasMemory: function () {\n            for (var i = 0; i < this.levels.length; i++) {\n                if(this.levels[i].context2D){\n                    this.levels[i].context2D.canvas.height = 0;\n                    this.levels[i].context2D.canvas.width = 0;\n                }\n            }\n        },\n    });\n\n}(OpenSeadragon));\n\n/*\n * OpenSeadragon - TileSourceCollection\n *\n * Copyright (C) 2009 CodePlex Foundation\n * Copyright (C) 2010-2013 OpenSeadragon contributors\n *\n * Redistribution and use in source and binary forms, with or without\n * modification, are permitted provided that the following conditions are\n * met:\n *\n * - Redistributions of source code must retain the above copyright notice,\n *   this list of conditions and the following disclaimer.\n *\n * - Redistributions in binary form must reproduce the above copyright\n *   notice, this list of conditions and the following disclaimer in the\n *   documentation and/or other materials provided with the distribution.\n *\n * - Neither the name of CodePlex Foundation nor the names of its\n *   contributors may be used to endorse or promote products derived from\n *   this software without specific prior written permission.\n *\n * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS\n * \"AS IS\" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT\n * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR\n * A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT\n * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,\n * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED\n * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR\n * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF\n * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING\n * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS\n * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.\n */\n\n(function($) {\n\n// deprecated\n$.TileSourceCollection = function(tileSize, tileSources, rows, layout) {\n    $.console.error('TileSourceCollection is deprecated; use World instead');\n};\n\n}(OpenSeadragon));\n\n/*\n * OpenSeadragon - Button\n *\n * Copyright (C) 2009 CodePlex Foundation\n * Copyright (C) 2010-2013 OpenSeadragon contributors\n *\n * Redistribution and use in source and binary forms, with or without\n * modification, are permitted provided that the following conditions are\n * met:\n *\n * - Redistributions of source code must retain the above copyright notice,\n *   this list of conditions and the following disclaimer.\n *\n * - Redistributions in binary form must reproduce the above copyright\n *   notice, this list of conditions and the following disclaimer in the\n *   documentation and/or other materials provided with the distribution.\n *\n * - Neither the name of CodePlex Foundation nor the names of its\n *   contributors may be used to endorse or promote products derived from\n *   this software without specific prior written permission.\n *\n * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS\n * \"AS IS\" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT\n * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR\n * A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT\n * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,\n * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED\n * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR\n * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF\n * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING\n * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS\n * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.\n */\n\n(function( $ ){\n\n/**\n * An enumeration of button states\n * @member ButtonState\n * @memberof OpenSeadragon\n * @static\n * @type {Object}\n * @property {Number} REST\n * @property {Number} GROUP\n * @property {Number} HOVER\n * @property {Number} DOWN\n */\n$.ButtonState = {\n    REST:   0,\n    GROUP:  1,\n    HOVER:  2,\n    DOWN:   3\n};\n\n/**\n * @class Button\n * @classdesc Manages events, hover states for individual buttons, tool-tips, as well\n * as fading the buttons out when the user has not interacted with them\n * for a specified period.\n *\n * @memberof OpenSeadragon\n * @extends OpenSeadragon.EventSource\n * @param {Object} options\n * @param {Element} [options.element=null] Element to use as the button. If not specified, an HTML &lt;div&gt; element is created.\n * @param {String} [options.tooltip=null] Provides context help for the button when the\n *  user hovers over it.\n * @param {String} [options.srcRest=null] URL of image to use in 'rest' state.\n * @param {String} [options.srcGroup=null] URL of image to use in 'up' state.\n * @param {String} [options.srcHover=null] URL of image to use in 'hover' state.\n * @param {String} [options.srcDown=null] URL of image to use in 'down' state.\n * @param {Number} [options.fadeDelay=0] How long to wait before fading.\n * @param {Number} [options.fadeLength=2000] How long should it take to fade the button.\n * @param {OpenSeadragon.EventHandler} [options.onPress=null] Event handler callback for {@link OpenSeadragon.Button.event:press}.\n * @param {OpenSeadragon.EventHandler} [options.onRelease=null] Event handler callback for {@link OpenSeadragon.Button.event:release}.\n * @param {OpenSeadragon.EventHandler} [options.onClick=null] Event handler callback for {@link OpenSeadragon.Button.event:click}.\n * @param {OpenSeadragon.EventHandler} [options.onEnter=null] Event handler callback for {@link OpenSeadragon.Button.event:enter}.\n * @param {OpenSeadragon.EventHandler} [options.onExit=null] Event handler callback for {@link OpenSeadragon.Button.event:exit}.\n * @param {OpenSeadragon.EventHandler} [options.onFocus=null] Event handler callback for {@link OpenSeadragon.Button.event:focus}.\n * @param {OpenSeadragon.EventHandler} [options.onBlur=null] Event handler callback for {@link OpenSeadragon.Button.event:blur}.\n * @param {Object} [options.userData=null] Arbitrary object to be passed unchanged to any attached handler methods.\n */\n$.Button = function( options ) {\n\n    var _this = this;\n\n    $.EventSource.call( this );\n\n    $.extend( true, this, {\n\n        tooltip:            null,\n        srcRest:            null,\n        srcGroup:           null,\n        srcHover:           null,\n        srcDown:            null,\n        clickTimeThreshold: $.DEFAULT_SETTINGS.clickTimeThreshold,\n        clickDistThreshold: $.DEFAULT_SETTINGS.clickDistThreshold,\n        /**\n         * How long to wait before fading.\n         * @member {Number} fadeDelay\n         * @memberof OpenSeadragon.Button#\n         */\n        fadeDelay:          0,\n        /**\n         * How long should it take to fade the button.\n         * @member {Number} fadeLength\n         * @memberof OpenSeadragon.Button#\n         */\n        fadeLength:         2000,\n        onPress:            null,\n        onRelease:          null,\n        onClick:            null,\n        onEnter:            null,\n        onExit:             null,\n        onFocus:            null,\n        onBlur:             null,\n        userData:           null\n\n    }, options );\n\n    /**\n     * The button element.\n     * @member {Element} element\n     * @memberof OpenSeadragon.Button#\n     */\n    this.element = options.element || $.makeNeutralElement(\"div\");\n\n    //if the user has specified the element to bind the control to explicitly\n    //then do not add the default control images\n    if ( !options.element ) {\n        this.imgRest      = $.makeTransparentImage( this.srcRest );\n        this.imgGroup     = $.makeTransparentImage( this.srcGroup );\n        this.imgHover     = $.makeTransparentImage( this.srcHover );\n        this.imgDown      = $.makeTransparentImage( this.srcDown );\n\n        this.imgRest.alt  =\n        this.imgGroup.alt =\n        this.imgHover.alt =\n        this.imgDown.alt  =\n            this.tooltip;\n\n        // Allow pointer events to pass through the img elements so implicit\n        //   pointer capture works on touch devices\n        $.setElementPointerEventsNone( this.imgRest );\n        $.setElementPointerEventsNone( this.imgGroup );\n        $.setElementPointerEventsNone( this.imgHover );\n        $.setElementPointerEventsNone( this.imgDown );\n\n        this.element.style.position = \"relative\";\n        $.setElementTouchActionNone( this.element );\n\n        this.imgGroup.style.position =\n        this.imgHover.style.position =\n        this.imgDown.style.position  =\n            \"absolute\";\n\n        this.imgGroup.style.top =\n        this.imgHover.style.top =\n        this.imgDown.style.top  =\n            \"0px\";\n\n        this.imgGroup.style.left =\n        this.imgHover.style.left =\n        this.imgDown.style.left  =\n            \"0px\";\n\n        this.imgHover.style.visibility =\n        this.imgDown.style.visibility  =\n            \"hidden\";\n\n        if ($.Browser.vendor === $.BROWSERS.FIREFOX && $.Browser.version < 3) {\n            this.imgGroup.style.top =\n            this.imgHover.style.top =\n            this.imgDown.style.top  =\n                \"\";\n        }\n\n        this.element.appendChild( this.imgRest );\n        this.element.appendChild( this.imgGroup );\n        this.element.appendChild( this.imgHover );\n        this.element.appendChild( this.imgDown );\n    }\n\n\n    this.addHandler(\"press\", this.onPress);\n    this.addHandler(\"release\", this.onRelease);\n    this.addHandler(\"click\", this.onClick);\n    this.addHandler(\"enter\", this.onEnter);\n    this.addHandler(\"exit\", this.onExit);\n    this.addHandler(\"focus\", this.onFocus);\n    this.addHandler(\"blur\", this.onBlur);\n\n    /**\n     * The button's current state.\n     * @member {OpenSeadragon.ButtonState} currentState\n     * @memberof OpenSeadragon.Button#\n     */\n    this.currentState = $.ButtonState.GROUP;\n\n    // When the button last began to fade.\n    this.fadeBeginTime  = null;\n    // Whether this button should fade after user stops interacting with the viewport.\n    this.shouldFade     = false;\n\n    this.element.style.display  = \"inline-block\";\n    this.element.style.position = \"relative\";\n    this.element.title          = this.tooltip;\n\n    /**\n     * Tracks mouse/touch/key events on the button.\n     * @member {OpenSeadragon.MouseTracker} tracker\n     * @memberof OpenSeadragon.Button#\n     */\n    this.tracker = new $.MouseTracker({\n\n        userData:           'Button.tracker',\n        element:            this.element,\n        clickTimeThreshold: this.clickTimeThreshold,\n        clickDistThreshold: this.clickDistThreshold,\n\n        enterHandler: function( event ) {\n            if ( event.insideElementPressed ) {\n                inTo( _this, $.ButtonState.DOWN );\n                /**\n                 * Raised when the cursor enters the Button element.\n                 *\n                 * @event enter\n                 * @memberof OpenSeadragon.Button\n                 * @type {object}\n                 * @property {OpenSeadragon.Button} eventSource - A reference to the Button which raised the event.\n                 * @property {Object} originalEvent - The original DOM event.\n                 * @property {?Object} userData - Arbitrary subscriber-defined object.\n                 */\n                _this.raiseEvent( \"enter\", { originalEvent: event.originalEvent } );\n            } else if ( !event.buttonDownAny ) {\n                inTo( _this, $.ButtonState.HOVER );\n            }\n        },\n\n        focusHandler: function ( event ) {\n            _this.tracker.enterHandler( event );\n            /**\n             * Raised when the Button element receives focus.\n             *\n             * @event focus\n             * @memberof OpenSeadragon.Button\n             * @type {object}\n             * @property {OpenSeadragon.Button} eventSource - A reference to the Button which raised the event.\n             * @property {Object} originalEvent - The original DOM event.\n             * @property {?Object} userData - Arbitrary subscriber-defined object.\n             */\n            _this.raiseEvent( \"focus\", { originalEvent: event.originalEvent } );\n        },\n\n        leaveHandler: function( event ) {\n            outTo( _this, $.ButtonState.GROUP );\n            if ( event.insideElementPressed ) {\n                /**\n                 * Raised when the cursor leaves the Button element.\n                 *\n                 * @event exit\n                 * @memberof OpenSeadragon.Button\n                 * @type {object}\n                 * @property {OpenSeadragon.Button} eventSource - A reference to the Button which raised the event.\n                 * @property {Object} originalEvent - The original DOM event.\n                 * @property {?Object} userData - Arbitrary subscriber-defined object.\n                 */\n                _this.raiseEvent( \"exit\", { originalEvent: event.originalEvent } );\n            }\n        },\n\n        blurHandler: function ( event ) {\n            _this.tracker.leaveHandler( event );\n            /**\n             * Raised when the Button element loses focus.\n             *\n             * @event blur\n             * @memberof OpenSeadragon.Button\n             * @type {object}\n             * @property {OpenSeadragon.Button} eventSource - A reference to the Button which raised the event.\n             * @property {Object} originalEvent - The original DOM event.\n             * @property {?Object} userData - Arbitrary subscriber-defined object.\n             */\n            _this.raiseEvent( \"blur\", { originalEvent: event.originalEvent } );\n        },\n\n        pressHandler: function ( event ) {\n            inTo( _this, $.ButtonState.DOWN );\n            /**\n             * Raised when a mouse button is pressed or touch occurs in the Button element.\n             *\n             * @event press\n             * @memberof OpenSeadragon.Button\n             * @type {object}\n             * @property {OpenSeadragon.Button} eventSource - A reference to the Button which raised the event.\n             * @property {Object} originalEvent - The original DOM event.\n             * @property {?Object} userData - Arbitrary subscriber-defined object.\n             */\n            _this.raiseEvent( \"press\", { originalEvent: event.originalEvent } );\n        },\n\n        releaseHandler: function( event ) {\n            if ( event.insideElementPressed && event.insideElementReleased ) {\n                outTo( _this, $.ButtonState.HOVER );\n                /**\n                 * Raised when the mouse button is released or touch ends in the Button element.\n                 *\n                 * @event release\n                 * @memberof OpenSeadragon.Button\n                 * @type {object}\n                 * @property {OpenSeadragon.Button} eventSource - A reference to the Button which raised the event.\n                 * @property {Object} originalEvent - The original DOM event.\n                 * @property {?Object} userData - Arbitrary subscriber-defined object.\n                 */\n                _this.raiseEvent( \"release\", { originalEvent: event.originalEvent } );\n            } else if ( event.insideElementPressed ) {\n                outTo( _this, $.ButtonState.GROUP );\n            } else {\n                inTo( _this, $.ButtonState.HOVER );\n            }\n        },\n\n        clickHandler: function( event ) {\n            if ( event.quick ) {\n                /**\n                 * Raised when a mouse button is pressed and released or touch is initiated and ended in the Button element within the time and distance threshold.\n                 *\n                 * @event click\n                 * @memberof OpenSeadragon.Button\n                 * @type {object}\n                 * @property {OpenSeadragon.Button} eventSource - A reference to the Button which raised the event.\n                 * @property {Object} originalEvent - The original DOM event.\n                 * @property {?Object} userData - Arbitrary subscriber-defined object.\n                 */\n                _this.raiseEvent(\"click\", { originalEvent: event.originalEvent });\n            }\n        },\n\n        keyHandler: function( event ){\n            //console.log( \"%s : handling key %s!\", _this.tooltip, event.keyCode);\n            if( 13 === event.keyCode ){\n                /***\n                 * Raised when a mouse button is pressed and released or touch is initiated and ended in the Button element within the time and distance threshold.\n                 *\n                 * @event click\n                 * @memberof OpenSeadragon.Button\n                 * @type {object}\n                 * @property {OpenSeadragon.Button} eventSource - A reference to the Button which raised the event.\n                 * @property {Object} originalEvent - The original DOM event.\n                 * @property {?Object} userData - Arbitrary subscriber-defined object.\n                 */\n                _this.raiseEvent( \"click\", { originalEvent: event.originalEvent } );\n                /***\n                 * Raised when the mouse button is released or touch ends in the Button element.\n                 *\n                 * @event release\n                 * @memberof OpenSeadragon.Button\n                 * @type {object}\n                 * @property {OpenSeadragon.Button} eventSource - A reference to the Button which raised the event.\n                 * @property {Object} originalEvent - The original DOM event.\n                 * @property {?Object} userData - Arbitrary subscriber-defined object.\n                 */\n                _this.raiseEvent( \"release\", { originalEvent: event.originalEvent } );\n\n                event.preventDefault = true;\n            } else{\n                event.preventDefault = false;\n            }\n        }\n\n    });\n\n    outTo( this, $.ButtonState.REST );\n};\n\n$.extend( $.Button.prototype, $.EventSource.prototype, /** @lends OpenSeadragon.Button.prototype */{\n\n    /**\n     * Used by a button container element (e.g. a ButtonGroup) to transition the button state\n     * to ButtonState.GROUP.\n     * @function\n     */\n    notifyGroupEnter: function() {\n        inTo( this, $.ButtonState.GROUP );\n    },\n\n    /**\n     * Used by a button container element (e.g. a ButtonGroup) to transition the button state\n     * to ButtonState.REST.\n     * @function\n     */\n    notifyGroupExit: function() {\n        outTo( this, $.ButtonState.REST );\n    },\n\n    /**\n     * @function\n     */\n    disable: function(){\n        this.notifyGroupExit();\n        this.element.disabled = true;\n        $.setElementOpacity( this.element, 0.2, true );\n    },\n\n    /**\n     * @function\n     */\n    enable: function(){\n        this.element.disabled = false;\n        $.setElementOpacity( this.element, 1.0, true );\n        this.notifyGroupEnter();\n    },\n\n    destroy: function() {\n        if (this.imgRest) {\n            this.element.removeChild(this.imgRest);\n            this.imgRest = null;\n        }\n        if (this.imgGroup) {\n            this.element.removeChild(this.imgGroup);\n            this.imgGroup = null;\n        }\n        if (this.imgHover) {\n            this.element.removeChild(this.imgHover);\n            this.imgHover = null;\n        }\n        if (this.imgDown) {\n            this.element.removeChild(this.imgDown);\n            this.imgDown = null;\n        }\n        this.removeAllHandlers();\n        this.tracker.destroy();\n        this.element = null;\n    }\n\n});\n\n\nfunction scheduleFade( button ) {\n    $.requestAnimationFrame(function(){\n        updateFade( button );\n    });\n}\n\nfunction updateFade( button ) {\n    var currentTime,\n        deltaTime,\n        opacity;\n\n    if ( button.shouldFade ) {\n        currentTime = $.now();\n        deltaTime   = currentTime - button.fadeBeginTime;\n        opacity     = 1.0 - deltaTime / button.fadeLength;\n        opacity     = Math.min( 1.0, opacity );\n        opacity     = Math.max( 0.0, opacity );\n\n        if( button.imgGroup ){\n            $.setElementOpacity( button.imgGroup, opacity, true );\n        }\n        if ( opacity > 0 ) {\n            // fade again\n            scheduleFade( button );\n        }\n    }\n}\n\nfunction beginFading( button ) {\n    button.shouldFade = true;\n    button.fadeBeginTime = $.now() + button.fadeDelay;\n    window.setTimeout( function(){\n        scheduleFade( button );\n    }, button.fadeDelay );\n}\n\nfunction stopFading( button ) {\n    button.shouldFade = false;\n    if( button.imgGroup ){\n        $.setElementOpacity( button.imgGroup, 1.0, true );\n    }\n}\n\nfunction inTo( button, newState ) {\n\n    if( button.element.disabled ){\n        return;\n    }\n\n    if ( newState >= $.ButtonState.GROUP &&\n         button.currentState === $.ButtonState.REST ) {\n        stopFading( button );\n        button.currentState = $.ButtonState.GROUP;\n    }\n\n    if ( newState >= $.ButtonState.HOVER &&\n         button.currentState === $.ButtonState.GROUP ) {\n        if( button.imgHover ){\n            button.imgHover.style.visibility = \"\";\n        }\n        button.currentState = $.ButtonState.HOVER;\n    }\n\n    if ( newState >= $.ButtonState.DOWN &&\n         button.currentState === $.ButtonState.HOVER ) {\n        if( button.imgDown ){\n            button.imgDown.style.visibility = \"\";\n        }\n        button.currentState = $.ButtonState.DOWN;\n    }\n}\n\n\nfunction outTo( button, newState ) {\n\n    if( button.element.disabled ){\n        return;\n    }\n\n    if ( newState <= $.ButtonState.HOVER &&\n         button.currentState === $.ButtonState.DOWN ) {\n        if( button.imgDown ){\n            button.imgDown.style.visibility = \"hidden\";\n        }\n        button.currentState = $.ButtonState.HOVER;\n    }\n\n    if ( newState <= $.ButtonState.GROUP &&\n         button.currentState === $.ButtonState.HOVER ) {\n        if( button.imgHover ){\n            button.imgHover.style.visibility = \"hidden\";\n        }\n        button.currentState = $.ButtonState.GROUP;\n    }\n\n    if ( newState <= $.ButtonState.REST &&\n         button.currentState === $.ButtonState.GROUP ) {\n        beginFading( button );\n        button.currentState = $.ButtonState.REST;\n    }\n}\n\n\n\n}( OpenSeadragon ));\n\n/*\n * OpenSeadragon - ButtonGroup\n *\n * Copyright (C) 2009 CodePlex Foundation\n * Copyright (C) 2010-2013 OpenSeadragon contributors\n *\n * Redistribution and use in source and binary forms, with or without\n * modification, are permitted provided that the following conditions are\n * met:\n *\n * - Redistributions of source code must retain the above copyright notice,\n *   this list of conditions and the following disclaimer.\n *\n * - Redistributions in binary form must reproduce the above copyright\n *   notice, this list of conditions and the following disclaimer in the\n *   documentation and/or other materials provided with the distribution.\n *\n * - Neither the name of CodePlex Foundation nor the names of its\n *   contributors may be used to endorse or promote products derived from\n *   this software without specific prior written permission.\n *\n * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS\n * \"AS IS\" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT\n * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR\n * A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT\n * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,\n * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED\n * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR\n * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF\n * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING\n * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS\n * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.\n */\n\n(function( $ ){\n/**\n * @class ButtonGroup\n * @classdesc Manages events on groups of buttons.\n *\n * @memberof OpenSeadragon\n * @param {Object} options - A dictionary of settings applied against the entire group of buttons.\n * @param {Array} options.buttons Array of buttons\n * @param {Element} [options.element] Element to use as the container\n **/\n$.ButtonGroup = function( options ) {\n\n    $.extend( true, this, {\n        /**\n         * An array containing the buttons themselves.\n         * @member {Array} buttons\n         * @memberof OpenSeadragon.ButtonGroup#\n         */\n        buttons:            [],\n        clickTimeThreshold: $.DEFAULT_SETTINGS.clickTimeThreshold,\n        clickDistThreshold: $.DEFAULT_SETTINGS.clickDistThreshold,\n        labelText:          \"\"\n    }, options );\n\n    // copy the button elements  TODO: Why?\n    var buttons = this.buttons.concat([]),\n        _this = this,\n        i;\n\n    /**\n     * The shared container for the buttons.\n     * @member {Element} element\n     * @memberof OpenSeadragon.ButtonGroup#\n     */\n    this.element = options.element || $.makeNeutralElement( \"div\" );\n\n    // TODO What if there IS an options.group specified?\n    if( !options.group ){\n        this.element.style.display = \"inline-block\";\n        //this.label   = $.makeNeutralElement( \"label\" );\n        //TODO: support labels for ButtonGroups\n        //this.label.innerHTML = this.labelText;\n        //this.element.appendChild( this.label );\n        for ( i = 0; i < buttons.length; i++ ) {\n            this.element.appendChild( buttons[ i ].element );\n        }\n    }\n\n    $.setElementTouchActionNone( this.element );\n\n    /**\n     * Tracks mouse/touch/key events across the group of buttons.\n     * @member {OpenSeadragon.MouseTracker} tracker\n     * @memberof OpenSeadragon.ButtonGroup#\n     */\n    this.tracker = new $.MouseTracker({\n        userData:           'ButtonGroup.tracker',\n        element:            this.element,\n        clickTimeThreshold: this.clickTimeThreshold,\n        clickDistThreshold: this.clickDistThreshold,\n        enterHandler: function ( event ) {\n            var i;\n            for ( i = 0; i < _this.buttons.length; i++ ) {\n                _this.buttons[ i ].notifyGroupEnter();\n            }\n        },\n        leaveHandler: function ( event ) {\n            var i;\n            if ( !event.insideElementPressed ) {\n                for ( i = 0; i < _this.buttons.length; i++ ) {\n                    _this.buttons[ i ].notifyGroupExit();\n                }\n            }\n        },\n    });\n};\n\n/** @lends OpenSeadragon.ButtonGroup.prototype */\n$.ButtonGroup.prototype = {\n\n    /**\n     * TODO: Figure out why this is used on the public API and if a more useful\n     * api can be created.\n     * @function\n     * @private\n     */\n    emulateEnter: function() {\n        this.tracker.enterHandler( { eventSource: this.tracker } );\n    },\n\n    /**\n     * TODO: Figure out why this is used on the public API and if a more useful\n     * api can be created.\n     * @function\n     * @private\n     */\n    emulateLeave: function() {\n        this.tracker.leaveHandler( { eventSource: this.tracker } );\n    },\n\n    destroy: function() {\n        while (this.buttons.length) {\n            var button = this.buttons.pop();\n            this.element.removeChild(button.element);\n            button.destroy();\n        }\n        this.tracker.destroy();\n        this.element = null;\n    }\n};\n\n\n}( OpenSeadragon ));\n\n/*\n * OpenSeadragon - Rect\n *\n * Copyright (C) 2009 CodePlex Foundation\n * Copyright (C) 2010-2013 OpenSeadragon contributors\n *\n * Redistribution and use in source and binary forms, with or without\n * modification, are permitted provided that the following conditions are\n * met:\n *\n * - Redistributions of source code must retain the above copyright notice,\n *   this list of conditions and the following disclaimer.\n *\n * - Redistributions in binary form must reproduce the above copyright\n *   notice, this list of conditions and the following disclaimer in the\n *   documentation and/or other materials provided with the distribution.\n *\n * - Neither the name of CodePlex Foundation nor the names of its\n *   contributors may be used to endorse or promote products derived from\n *   this software without specific prior written permission.\n *\n * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS\n * \"AS IS\" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT\n * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR\n * A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT\n * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,\n * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED\n * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR\n * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF\n * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING\n * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS\n * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.\n */\n\n(function($) {\n\n/**\n * @class Rect\n * @classdesc A Rectangle is described by it top left coordinates (x, y), width,\n * height and degrees of rotation around (x, y).\n * Note that the coordinate system used is the one commonly used with images:\n * x increases when going to the right\n * y increases when going to the bottom\n * degrees increases clockwise with 0 being the horizontal\n *\n * The constructor normalizes the rectangle to always have 0 <= degrees < 90\n *\n * @memberof OpenSeadragon\n * @param {Number} [x=0] The vector component 'x'.\n * @param {Number} [y=0] The vector component 'y'.\n * @param {Number} [width=0] The vector component 'width'.\n * @param {Number} [height=0] The vector component 'height'.\n * @param {Number} [degrees=0] Rotation of the rectangle around (x,y) in degrees.\n */\n$.Rect = function(x, y, width, height, degrees) {\n    /**\n     * The vector component 'x'.\n     * @member {Number} x\n     * @memberof OpenSeadragon.Rect#\n     */\n    this.x = typeof (x) === \"number\" ? x : 0;\n    /**\n     * The vector component 'y'.\n     * @member {Number} y\n     * @memberof OpenSeadragon.Rect#\n     */\n    this.y = typeof (y) === \"number\" ? y : 0;\n    /**\n     * The vector component 'width'.\n     * @member {Number} width\n     * @memberof OpenSeadragon.Rect#\n     */\n    this.width  = typeof (width) === \"number\" ? width : 0;\n    /**\n     * The vector component 'height'.\n     * @member {Number} height\n     * @memberof OpenSeadragon.Rect#\n     */\n    this.height = typeof (height) === \"number\" ? height : 0;\n\n    /**\n     * The rotation of the rectangle, in degrees.\n     * @member {Number} degrees\n     * @memberof OpenSeadragon.Rect#\n     */\n    this.degrees = typeof (degrees) === \"number\" ? degrees : 0;\n\n    // Normalizes the rectangle.\n    this.degrees = $.positiveModulo(this.degrees, 360);\n    var newTopLeft, newWidth;\n    if (this.degrees >= 270) {\n        newTopLeft = this.getTopRight();\n        this.x = newTopLeft.x;\n        this.y = newTopLeft.y;\n        newWidth = this.height;\n        this.height = this.width;\n        this.width = newWidth;\n        this.degrees -= 270;\n    } else if (this.degrees >= 180) {\n        newTopLeft = this.getBottomRight();\n        this.x = newTopLeft.x;\n        this.y = newTopLeft.y;\n        this.degrees -= 180;\n    } else if (this.degrees >= 90) {\n        newTopLeft = this.getBottomLeft();\n        this.x = newTopLeft.x;\n        this.y = newTopLeft.y;\n        newWidth = this.height;\n        this.height = this.width;\n        this.width = newWidth;\n        this.degrees -= 90;\n    }\n};\n\n/**\n * Builds a rectangle having the 3 specified points as summits.\n * @static\n * @memberof OpenSeadragon.Rect\n * @param {OpenSeadragon.Point} topLeft\n * @param {OpenSeadragon.Point} topRight\n * @param {OpenSeadragon.Point} bottomLeft\n * @returns {OpenSeadragon.Rect}\n */\n$.Rect.fromSummits = function(topLeft, topRight, bottomLeft) {\n    var width = topLeft.distanceTo(topRight);\n    var height = topLeft.distanceTo(bottomLeft);\n    var diff = topRight.minus(topLeft);\n    var radians = Math.atan(diff.y / diff.x);\n    if (diff.x < 0) {\n        radians += Math.PI;\n    } else if (diff.y < 0) {\n        radians += 2 * Math.PI;\n    }\n    return new $.Rect(\n        topLeft.x,\n        topLeft.y,\n        width,\n        height,\n        radians / Math.PI * 180);\n};\n\n/** @lends OpenSeadragon.Rect.prototype */\n$.Rect.prototype = {\n    /**\n     * @function\n     * @returns {OpenSeadragon.Rect} a duplicate of this Rect\n     */\n    clone: function() {\n        return new $.Rect(\n            this.x,\n            this.y,\n            this.width,\n            this.height,\n            this.degrees);\n    },\n\n    /**\n     * The aspect ratio is simply the ratio of width to height.\n     * @function\n     * @returns {Number} The ratio of width to height.\n     */\n    getAspectRatio: function() {\n        return this.width / this.height;\n    },\n\n    /**\n     * Provides the coordinates of the upper-left corner of the rectangle as a\n     * point.\n     * @function\n     * @returns {OpenSeadragon.Point} The coordinate of the upper-left corner of\n     *  the rectangle.\n     */\n    getTopLeft: function() {\n        return new $.Point(\n            this.x,\n            this.y\n        );\n    },\n\n    /**\n     * Provides the coordinates of the bottom-right corner of the rectangle as a\n     * point.\n     * @function\n     * @returns {OpenSeadragon.Point} The coordinate of the bottom-right corner of\n     *  the rectangle.\n     */\n    getBottomRight: function() {\n        return new $.Point(this.x + this.width, this.y + this.height)\n            .rotate(this.degrees, this.getTopLeft());\n    },\n\n    /**\n     * Provides the coordinates of the top-right corner of the rectangle as a\n     * point.\n     * @function\n     * @returns {OpenSeadragon.Point} The coordinate of the top-right corner of\n     *  the rectangle.\n     */\n    getTopRight: function() {\n        return new $.Point(this.x + this.width, this.y)\n            .rotate(this.degrees, this.getTopLeft());\n    },\n\n    /**\n     * Provides the coordinates of the bottom-left corner of the rectangle as a\n     * point.\n     * @function\n     * @returns {OpenSeadragon.Point} The coordinate of the bottom-left corner of\n     *  the rectangle.\n     */\n    getBottomLeft: function() {\n        return new $.Point(this.x, this.y + this.height)\n            .rotate(this.degrees, this.getTopLeft());\n    },\n\n    /**\n     * Computes the center of the rectangle.\n     * @function\n     * @returns {OpenSeadragon.Point} The center of the rectangle as represented\n     *  as represented by a 2-dimensional vector (x,y)\n     */\n    getCenter: function() {\n        return new $.Point(\n            this.x + this.width / 2.0,\n            this.y + this.height / 2.0\n        ).rotate(this.degrees, this.getTopLeft());\n    },\n\n    /**\n     * Returns the width and height component as a vector OpenSeadragon.Point\n     * @function\n     * @returns {OpenSeadragon.Point} The 2 dimensional vector representing the\n     *  width and height of the rectangle.\n     */\n    getSize: function() {\n        return new $.Point(this.width, this.height);\n    },\n\n    /**\n     * Determines if two Rectangles have equivalent components.\n     * @function\n     * @param {OpenSeadragon.Rect} rectangle The Rectangle to compare to.\n     * @return {Boolean} 'true' if all components are equal, otherwise 'false'.\n     */\n    equals: function(other) {\n        return (other instanceof $.Rect) &&\n            this.x === other.x &&\n            this.y === other.y &&\n            this.width === other.width &&\n            this.height === other.height &&\n            this.degrees === other.degrees;\n    },\n\n    /**\n    * Multiply all dimensions (except degrees) in this Rect by a factor and\n    * return a new Rect.\n    * @function\n    * @param {Number} factor The factor to multiply vector components.\n    * @returns {OpenSeadragon.Rect} A new rect representing the multiplication\n    *  of the vector components by the factor\n    */\n    times: function(factor) {\n        return new $.Rect(\n            this.x * factor,\n            this.y * factor,\n            this.width * factor,\n            this.height * factor,\n            this.degrees);\n    },\n\n    /**\n    * Translate/move this Rect by a vector and return new Rect.\n    * @function\n    * @param {OpenSeadragon.Point} delta The translation vector.\n    * @returns {OpenSeadragon.Rect} A new rect with altered position\n    */\n    translate: function(delta) {\n        return new $.Rect(\n            this.x + delta.x,\n            this.y + delta.y,\n            this.width,\n            this.height,\n            this.degrees);\n    },\n\n    /**\n     * Returns the smallest rectangle that will contain this and the given\n     * rectangle bounding boxes.\n     * @param {OpenSeadragon.Rect} rect\n     * @return {OpenSeadragon.Rect} The new rectangle.\n     */\n    union: function(rect) {\n        var thisBoundingBox = this.getBoundingBox();\n        var otherBoundingBox = rect.getBoundingBox();\n\n        var left = Math.min(thisBoundingBox.x, otherBoundingBox.x);\n        var top = Math.min(thisBoundingBox.y, otherBoundingBox.y);\n        var right = Math.max(\n            thisBoundingBox.x + thisBoundingBox.width,\n            otherBoundingBox.x + otherBoundingBox.width);\n        var bottom = Math.max(\n            thisBoundingBox.y + thisBoundingBox.height,\n            otherBoundingBox.y + otherBoundingBox.height);\n\n        return new $.Rect(\n            left,\n            top,\n            right - left,\n            bottom - top);\n    },\n\n    /**\n     * Returns the bounding box of the intersection of this rectangle with the\n     * given rectangle.\n     * @param {OpenSeadragon.Rect} rect\n     * @return {OpenSeadragon.Rect} the bounding box of the intersection\n     * or null if the rectangles don't intersect.\n     */\n    intersection: function(rect) {\n        // Simplified version of Weiler Atherton clipping algorithm\n        // https://en.wikipedia.org/wiki/Weiler%E2%80%93Atherton_clipping_algorithm\n        // Because we just want the bounding box of the intersection,\n        // we can just compute the bounding box of:\n        // 1. all the summits of this which are inside rect\n        // 2. all the summits of rect which are inside this\n        // 3. all the intersections of rect and this\n        var EPSILON = 0.0000000001;\n\n        var intersectionPoints = [];\n\n        var thisTopLeft = this.getTopLeft();\n        if (rect.containsPoint(thisTopLeft, EPSILON)) {\n            intersectionPoints.push(thisTopLeft);\n        }\n        var thisTopRight = this.getTopRight();\n        if (rect.containsPoint(thisTopRight, EPSILON)) {\n            intersectionPoints.push(thisTopRight);\n        }\n        var thisBottomLeft = this.getBottomLeft();\n        if (rect.containsPoint(thisBottomLeft, EPSILON)) {\n            intersectionPoints.push(thisBottomLeft);\n        }\n        var thisBottomRight = this.getBottomRight();\n        if (rect.containsPoint(thisBottomRight, EPSILON)) {\n            intersectionPoints.push(thisBottomRight);\n        }\n\n        var rectTopLeft = rect.getTopLeft();\n        if (this.containsPoint(rectTopLeft, EPSILON)) {\n            intersectionPoints.push(rectTopLeft);\n        }\n        var rectTopRight = rect.getTopRight();\n        if (this.containsPoint(rectTopRight, EPSILON)) {\n            intersectionPoints.push(rectTopRight);\n        }\n        var rectBottomLeft = rect.getBottomLeft();\n        if (this.containsPoint(rectBottomLeft, EPSILON)) {\n            intersectionPoints.push(rectBottomLeft);\n        }\n        var rectBottomRight = rect.getBottomRight();\n        if (this.containsPoint(rectBottomRight, EPSILON)) {\n            intersectionPoints.push(rectBottomRight);\n        }\n\n        var thisSegments = this._getSegments();\n        var rectSegments = rect._getSegments();\n        for (var i = 0; i < thisSegments.length; i++) {\n            var thisSegment = thisSegments[i];\n            for (var j = 0; j < rectSegments.length; j++) {\n                var rectSegment = rectSegments[j];\n                var intersect = getIntersection(thisSegment[0], thisSegment[1],\n                    rectSegment[0], rectSegment[1]);\n                if (intersect) {\n                    intersectionPoints.push(intersect);\n                }\n            }\n        }\n\n        // Get intersection point of segments [a,b] and [c,d]\n        function getIntersection(a, b, c, d) {\n            // http://stackoverflow.com/a/1968345/1440403\n            var abVector = b.minus(a);\n            var cdVector = d.minus(c);\n\n            var denom = -cdVector.x * abVector.y + abVector.x * cdVector.y;\n            if (denom === 0) {\n                return null;\n            }\n\n            var s = (abVector.x * (a.y - c.y) - abVector.y * (a.x - c.x)) / denom;\n            var t = (cdVector.x * (a.y - c.y) - cdVector.y * (a.x - c.x)) / denom;\n\n            if (-EPSILON <= s && s <= 1 - EPSILON &&\n                -EPSILON <= t && t <= 1 - EPSILON) {\n                return new $.Point(a.x + t * abVector.x, a.y + t * abVector.y);\n            }\n            return null;\n        }\n\n        if (intersectionPoints.length === 0) {\n            return null;\n        }\n\n        var minX = intersectionPoints[0].x;\n        var maxX = intersectionPoints[0].x;\n        var minY = intersectionPoints[0].y;\n        var maxY = intersectionPoints[0].y;\n        for (var k = 1; k < intersectionPoints.length; k++) {\n            var point = intersectionPoints[k];\n            if (point.x < minX) {\n                minX = point.x;\n            }\n            if (point.x > maxX) {\n                maxX = point.x;\n            }\n            if (point.y < minY) {\n                minY = point.y;\n            }\n            if (point.y > maxY) {\n                maxY = point.y;\n            }\n        }\n        return new $.Rect(minX, minY, maxX - minX, maxY - minY);\n    },\n\n    // private\n    _getSegments: function() {\n        var topLeft = this.getTopLeft();\n        var topRight = this.getTopRight();\n        var bottomLeft = this.getBottomLeft();\n        var bottomRight = this.getBottomRight();\n        return [[topLeft, topRight],\n            [topRight, bottomRight],\n            [bottomRight, bottomLeft],\n            [bottomLeft, topLeft]];\n    },\n\n    /**\n     * Rotates a rectangle around a point.\n     * @function\n     * @param {Number} degrees The angle in degrees to rotate.\n     * @param {OpenSeadragon.Point} [pivot] The point about which to rotate.\n     * Defaults to the center of the rectangle.\n     * @return {OpenSeadragon.Rect}\n     */\n    rotate: function(degrees, pivot) {\n        degrees = $.positiveModulo(degrees, 360);\n        if (degrees === 0) {\n            return this.clone();\n        }\n\n        pivot = pivot || this.getCenter();\n        var newTopLeft = this.getTopLeft().rotate(degrees, pivot);\n        var newTopRight = this.getTopRight().rotate(degrees, pivot);\n\n        var diff = newTopRight.minus(newTopLeft);\n        // Handle floating point error\n        diff = diff.apply(function(x) {\n            var EPSILON = 1e-15;\n            return Math.abs(x) < EPSILON ? 0 : x;\n        });\n        var radians = Math.atan(diff.y / diff.x);\n        if (diff.x < 0) {\n            radians += Math.PI;\n        } else if (diff.y < 0) {\n            radians += 2 * Math.PI;\n        }\n        return new $.Rect(\n            newTopLeft.x,\n            newTopLeft.y,\n            this.width,\n            this.height,\n            radians / Math.PI * 180);\n    },\n\n    /**\n     * Retrieves the smallest horizontal (degrees=0) rectangle which contains\n     * this rectangle.\n     * @returns {OpenSeadragon.Rect}\n     */\n    getBoundingBox: function() {\n        if (this.degrees === 0) {\n            return this.clone();\n        }\n        var topLeft = this.getTopLeft();\n        var topRight = this.getTopRight();\n        var bottomLeft = this.getBottomLeft();\n        var bottomRight = this.getBottomRight();\n        var minX = Math.min(topLeft.x, topRight.x, bottomLeft.x, bottomRight.x);\n        var maxX = Math.max(topLeft.x, topRight.x, bottomLeft.x, bottomRight.x);\n        var minY = Math.min(topLeft.y, topRight.y, bottomLeft.y, bottomRight.y);\n        var maxY = Math.max(topLeft.y, topRight.y, bottomLeft.y, bottomRight.y);\n        return new $.Rect(\n            minX,\n            minY,\n            maxX - minX,\n            maxY - minY);\n    },\n\n    /**\n     * Retrieves the smallest horizontal (degrees=0) rectangle which contains\n     * this rectangle and has integers x, y, width and height\n     * @returns {OpenSeadragon.Rect}\n     */\n    getIntegerBoundingBox: function() {\n        var boundingBox = this.getBoundingBox();\n        var x = Math.floor(boundingBox.x);\n        var y = Math.floor(boundingBox.y);\n        var width = Math.ceil(boundingBox.width + boundingBox.x - x);\n        var height = Math.ceil(boundingBox.height + boundingBox.y - y);\n        return new $.Rect(x, y, width, height);\n    },\n\n    /**\n     * Determines whether a point is inside this rectangle (edge included).\n     * @function\n     * @param {OpenSeadragon.Point} point\n     * @param {Number} [epsilon=0] the margin of error allowed\n     * @returns {Boolean} true if the point is inside this rectangle, false\n     * otherwise.\n     */\n    containsPoint: function(point, epsilon) {\n        epsilon = epsilon || 0;\n\n        // See http://stackoverflow.com/a/2752754/1440403 for explanation\n        var topLeft = this.getTopLeft();\n        var topRight = this.getTopRight();\n        var bottomLeft = this.getBottomLeft();\n        var topDiff = topRight.minus(topLeft);\n        var leftDiff = bottomLeft.minus(topLeft);\n\n        return ((point.x - topLeft.x) * topDiff.x +\n            (point.y - topLeft.y) * topDiff.y >= -epsilon) &&\n\n            ((point.x - topRight.x) * topDiff.x +\n            (point.y - topRight.y) * topDiff.y <= epsilon) &&\n\n            ((point.x - topLeft.x) * leftDiff.x +\n            (point.y - topLeft.y) * leftDiff.y >= -epsilon) &&\n\n            ((point.x - bottomLeft.x) * leftDiff.x +\n            (point.y - bottomLeft.y) * leftDiff.y <= epsilon);\n    },\n\n    /**\n     * Provides a string representation of the rectangle which is useful for\n     * debugging.\n     * @function\n     * @returns {String} A string representation of the rectangle.\n     */\n    toString: function() {\n        return \"[\" +\n            (Math.round(this.x * 100) / 100) + \", \" +\n            (Math.round(this.y * 100) / 100) + \", \" +\n            (Math.round(this.width * 100) / 100) + \"x\" +\n            (Math.round(this.height * 100) / 100) + \", \" +\n            (Math.round(this.degrees * 100) / 100) + \"deg\" +\n            \"]\";\n    }\n};\n\n\n}(OpenSeadragon));\n\n/*\n * OpenSeadragon - ReferenceStrip\n *\n * Copyright (C) 2009 CodePlex Foundation\n * Copyright (C) 2010-2013 OpenSeadragon contributors\n *\n * Redistribution and use in source and binary forms, with or without\n * modification, are permitted provided that the following conditions are\n * met:\n *\n * - Redistributions of source code must retain the above copyright notice,\n *   this list of conditions and the following disclaimer.\n *\n * - Redistributions in binary form must reproduce the above copyright\n *   notice, this list of conditions and the following disclaimer in the\n *   documentation and/or other materials provided with the distribution.\n *\n * - Neither the name of CodePlex Foundation nor the names of its\n *   contributors may be used to endorse or promote products derived from\n *   this software without specific prior written permission.\n *\n * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS\n * \"AS IS\" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT\n * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR\n * A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT\n * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,\n * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED\n * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR\n * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF\n * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING\n * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS\n * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.\n */\n\n(function ( $ ) {\n\n// dictionary from id to private properties\nvar THIS = {};\n\n/**\n *  The CollectionDrawer is a reimplementation if the Drawer API that\n *  focuses on allowing a viewport to be redefined as a collection\n *  of smaller viewports, defined by a clear number of rows and / or\n *  columns of which each item in the matrix of viewports has its own\n *  source.\n *\n *  This idea is a reexpression of the idea of dzi collections\n *  which allows a clearer algorithm to reuse the tile sources already\n *  supported by OpenSeadragon, in heterogenious or homogenious\n *  sequences just like mixed groups already supported by the viewer\n *  for the purpose of image sequnces.\n *\n *  TODO:   The difficult part of this feature is figuring out how to express\n *          this functionality as a combination of the functionality already\n *          provided by Drawer, Viewport, TileSource, and Navigator.  It may\n *          require better abstraction at those points in order to efficiently\n *          reuse those paradigms.\n */\n/**\n * @class ReferenceStrip\n * @memberof OpenSeadragon\n * @param {Object} options\n */\n$.ReferenceStrip = function ( options ) {\n\n    var _this       = this,\n        viewer      = options.viewer,\n        viewerSize  = $.getElementSize( viewer.element ),\n        element,\n        style,\n        i;\n\n    //We may need to create a new element and id if they did not\n    //provide the id for the existing element\n    if ( !options.id ) {\n        options.id              = 'referencestrip-' + $.now();\n        this.element            = $.makeNeutralElement( \"div\" );\n        this.element.id         = options.id;\n        this.element.className  = 'referencestrip';\n    }\n\n    options = $.extend( true, {\n        sizeRatio:  $.DEFAULT_SETTINGS.referenceStripSizeRatio,\n        position:   $.DEFAULT_SETTINGS.referenceStripPosition,\n        scroll:     $.DEFAULT_SETTINGS.referenceStripScroll,\n        clickTimeThreshold:  $.DEFAULT_SETTINGS.clickTimeThreshold\n    }, options, {\n        element:                this.element\n    } );\n\n    $.extend( this, options );\n    //Private state properties\n    THIS[this.id] = {\n        animating:           false\n    };\n\n    this.minPixelRatio = this.viewer.minPixelRatio;\n\n    this.element.tabIndex = 0;\n\n    style = this.element.style;\n    style.marginTop     = '0px';\n    style.marginRight   = '0px';\n    style.marginBottom  = '0px';\n    style.marginLeft    = '0px';\n    style.left          = '0px';\n    style.bottom        = '0px';\n    style.border        = '0px';\n    style.background    = '#000';\n    style.position      = 'relative';\n\n    $.setElementTouchActionNone( this.element );\n\n    $.setElementOpacity( this.element, 0.8 );\n\n    this.viewer = viewer;\n    this.tracker = new $.MouseTracker( {\n        userData:       'ReferenceStrip.tracker',\n        element:        this.element,\n        clickHandler:   $.delegate( this, onStripClick ),\n        dragHandler:    $.delegate( this, onStripDrag ),\n        scrollHandler:  $.delegate( this, onStripScroll ),\n        enterHandler:   $.delegate( this, onStripEnter ),\n        leaveHandler:   $.delegate( this, onStripLeave ),\n        keyDownHandler: $.delegate( this, onKeyDown ),\n        keyHandler:     $.delegate( this, onKeyPress ),\n        preProcessEventHandler: function (eventInfo) {\n            if (eventInfo.eventType === 'wheel') {\n                eventInfo.preventDefault = true;\n            }\n        }\n    } );\n\n    //Controls the position and orientation of the reference strip and sets the\n    //appropriate width and height\n    if ( options.width && options.height ) {\n        this.element.style.width  = options.width + 'px';\n        this.element.style.height = options.height + 'px';\n        viewer.addControl(\n            this.element,\n            { anchor: $.ControlAnchor.BOTTOM_LEFT }\n        );\n    } else {\n        if ( \"horizontal\" === options.scroll ) {\n            this.element.style.width = (\n                viewerSize.x *\n                options.sizeRatio *\n                viewer.tileSources.length\n            ) + ( 12 * viewer.tileSources.length ) + 'px';\n\n            this.element.style.height = (\n                viewerSize.y *\n                options.sizeRatio\n            ) + 'px';\n\n            viewer.addControl(\n                this.element,\n                { anchor: $.ControlAnchor.BOTTOM_LEFT }\n            );\n        } else {\n            this.element.style.height = (\n                viewerSize.y *\n                options.sizeRatio *\n                viewer.tileSources.length\n            ) + ( 12 * viewer.tileSources.length ) + 'px';\n\n            this.element.style.width = (\n                viewerSize.x *\n                options.sizeRatio\n            ) + 'px';\n\n            viewer.addControl(\n                this.element,\n                { anchor: $.ControlAnchor.TOP_LEFT }\n            );\n\n        }\n    }\n\n    this.panelWidth = ( viewerSize.x * this.sizeRatio ) + 8;\n    this.panelHeight = ( viewerSize.y * this.sizeRatio ) + 8;\n    this.panels = [];\n    this.miniViewers = {};\n\n    /*jshint loopfunc:true*/\n    for ( i = 0; i < viewer.tileSources.length; i++ ) {\n\n        element = $.makeNeutralElement( 'div' );\n        element.id = this.element.id + \"-\" + i;\n\n        element.style.width         = _this.panelWidth + 'px';\n        element.style.height        = _this.panelHeight + 'px';\n        element.style.display       = 'inline';\n        element.style['float']      = 'left'; //Webkit\n        element.style.cssFloat      = 'left'; //Firefox\n        element.style.styleFloat    = 'left'; //IE\n        element.style.padding       = '2px';\n        $.setElementTouchActionNone( element );\n        $.setElementPointerEventsNone( element );\n\n        this.element.appendChild( element );\n\n        element.activePanel = false;\n\n        this.panels.push( element );\n\n    }\n    loadPanels( this, this.scroll === 'vertical' ? viewerSize.y : viewerSize.x, 0 );\n    this.setFocus( 0 );\n\n};\n\n/** @lends OpenSeadragon.ReferenceStrip.prototype */\n$.ReferenceStrip.prototype = {\n\n    /**\n     * @function\n     */\n    setFocus: function ( page ) {\n        var element      = this.element.querySelector('#' + this.element.id + '-' + page ),\n            viewerSize   = $.getElementSize( this.viewer.canvas ),\n            scrollWidth  = Number( this.element.style.width.replace( 'px', '' ) ),\n            scrollHeight = Number( this.element.style.height.replace( 'px', '' ) ),\n            offsetLeft   = -Number( this.element.style.marginLeft.replace( 'px', '' ) ),\n            offsetTop    = -Number( this.element.style.marginTop.replace( 'px', '' ) ),\n            offset;\n\n        if ( this.currentSelected !== element ) {\n            if ( this.currentSelected ) {\n                this.currentSelected.style.background = '#000';\n            }\n            this.currentSelected = element;\n            this.currentSelected.style.background = '#999';\n\n            if ( 'horizontal' === this.scroll ) {\n                //right left\n                offset = ( Number( page ) ) * ( this.panelWidth + 3 );\n                if ( offset > offsetLeft + viewerSize.x - this.panelWidth ) {\n                    offset = Math.min( offset, ( scrollWidth - viewerSize.x ) );\n                    this.element.style.marginLeft = -offset + 'px';\n                    loadPanels( this, viewerSize.x, -offset );\n                } else if ( offset < offsetLeft ) {\n                    offset = Math.max( 0, offset - viewerSize.x / 2 );\n                    this.element.style.marginLeft = -offset + 'px';\n                    loadPanels( this, viewerSize.x, -offset );\n                }\n            } else {\n                offset = ( Number( page ) ) * ( this.panelHeight + 3 );\n                if ( offset > offsetTop + viewerSize.y - this.panelHeight ) {\n                    offset = Math.min( offset, ( scrollHeight - viewerSize.y ) );\n                    this.element.style.marginTop = -offset + 'px';\n                    loadPanels( this, viewerSize.y, -offset );\n                } else if ( offset < offsetTop ) {\n                    offset = Math.max( 0, offset - viewerSize.y / 2 );\n                    this.element.style.marginTop = -offset + 'px';\n                    loadPanels( this, viewerSize.y, -offset );\n                }\n            }\n\n            this.currentPage = page;\n            onStripEnter.call( this, { eventSource: this.tracker } );\n        }\n    },\n\n    /**\n     * @function\n     */\n    update: function () {\n        if ( THIS[this.id].animating ) {\n            // $.console.log( 'image reference strip update' );\n            return true;\n        }\n        return false;\n    },\n\n    destroy: function() {\n        if (this.miniViewers) {\n          for (var key in this.miniViewers) {\n            this.miniViewers[key].destroy();\n          }\n        }\n\n        this.tracker.destroy();\n\n        if (this.element) {\n            this.viewer.removeControl( this.element );\n        }\n    }\n\n};\n\n\n/**\n * @private\n * @inner\n * @function\n */\nfunction onStripClick( event ) {\n    if ( event.quick ) {\n        var page;\n\n        if ( 'horizontal' === this.scroll ) {\n            page = Math.floor(event.position.x / this.panelWidth);\n        } else {\n            page = Math.floor(event.position.y / this.panelHeight);\n        }\n\n        this.viewer.goToPage( page );\n    }\n\n    this.element.focus();\n}\n\n\n/**\n * @private\n * @inner\n * @function\n */\nfunction onStripDrag( event ) {\n\n    this.dragging = true;\n    if ( this.element ) {\n        var offsetLeft   = Number( this.element.style.marginLeft.replace( 'px', '' ) ),\n        offsetTop    = Number( this.element.style.marginTop.replace( 'px', '' ) ),\n        scrollWidth  = Number( this.element.style.width.replace( 'px', '' ) ),\n        scrollHeight = Number( this.element.style.height.replace( 'px', '' ) ),\n        viewerSize   = $.getElementSize( this.viewer.canvas );\n\n        if ( 'horizontal' === this.scroll ) {\n            if ( -event.delta.x > 0 ) {\n                //forward\n                if ( offsetLeft > -( scrollWidth - viewerSize.x ) ) {\n                    this.element.style.marginLeft = ( offsetLeft + ( event.delta.x * 2 ) ) + 'px';\n                    loadPanels( this, viewerSize.x, offsetLeft + ( event.delta.x * 2 ) );\n                }\n            } else if ( -event.delta.x < 0 ) {\n                //reverse\n                if ( offsetLeft < 0 ) {\n                    this.element.style.marginLeft = ( offsetLeft + ( event.delta.x * 2 ) ) + 'px';\n                    loadPanels( this, viewerSize.x, offsetLeft + ( event.delta.x * 2 ) );\n                }\n            }\n        } else {\n            if ( -event.delta.y > 0 ) {\n                //forward\n                if ( offsetTop > -( scrollHeight - viewerSize.y ) ) {\n                    this.element.style.marginTop = ( offsetTop + ( event.delta.y * 2 ) ) + 'px';\n                    loadPanels( this, viewerSize.y, offsetTop + ( event.delta.y * 2 ) );\n                }\n            } else if ( -event.delta.y < 0 ) {\n                //reverse\n                if ( offsetTop < 0 ) {\n                    this.element.style.marginTop = ( offsetTop + ( event.delta.y * 2 ) ) + 'px';\n                    loadPanels( this, viewerSize.y, offsetTop + ( event.delta.y * 2 ) );\n                }\n            }\n        }\n    }\n\n}\n\n\n\n/**\n * @private\n * @inner\n * @function\n */\nfunction onStripScroll( event ) {\n    if ( this.element ) {\n        var offsetLeft   = Number( this.element.style.marginLeft.replace( 'px', '' ) ),\n        offsetTop    = Number( this.element.style.marginTop.replace( 'px', '' ) ),\n        scrollWidth  = Number( this.element.style.width.replace( 'px', '' ) ),\n        scrollHeight = Number( this.element.style.height.replace( 'px', '' ) ),\n        viewerSize   = $.getElementSize( this.viewer.canvas );\n\n        if ( 'horizontal' === this.scroll ) {\n            if ( event.scroll > 0 ) {\n                //forward\n                if ( offsetLeft > -( scrollWidth - viewerSize.x ) ) {\n                    this.element.style.marginLeft = ( offsetLeft - ( event.scroll * 60 ) ) + 'px';\n                    loadPanels( this, viewerSize.x, offsetLeft - ( event.scroll * 60 ) );\n                }\n            } else if ( event.scroll < 0 ) {\n                //reverse\n                if ( offsetLeft < 0 ) {\n                    this.element.style.marginLeft = ( offsetLeft - ( event.scroll * 60 ) ) + 'px';\n                    loadPanels( this, viewerSize.x, offsetLeft - ( event.scroll * 60 ) );\n                }\n            }\n        } else {\n            if ( event.scroll < 0 ) {\n                //scroll up\n                if ( offsetTop > viewerSize.y - scrollHeight ) {\n                    this.element.style.marginTop = ( offsetTop + ( event.scroll * 60 ) ) + 'px';\n                    loadPanels( this, viewerSize.y, offsetTop + ( event.scroll * 60 ) );\n                }\n            } else if ( event.scroll > 0 ) {\n                //scroll dowm\n                if ( offsetTop < 0 ) {\n                    this.element.style.marginTop = ( offsetTop + ( event.scroll * 60 ) ) + 'px';\n                    loadPanels( this, viewerSize.y, offsetTop + ( event.scroll * 60 ) );\n                }\n            }\n        }\n\n        event.preventDefault = true;\n    }\n}\n\n\nfunction loadPanels( strip, viewerSize, scroll ) {\n    var panelSize,\n        activePanelsStart,\n        activePanelsEnd,\n        miniViewer,\n        i,\n        element;\n    if ( 'horizontal' === strip.scroll ) {\n        panelSize = strip.panelWidth;\n    } else {\n        panelSize = strip.panelHeight;\n    }\n    activePanelsStart = Math.ceil( viewerSize / panelSize ) + 5;\n    activePanelsEnd = Math.ceil( ( Math.abs( scroll ) + viewerSize ) / panelSize ) + 1;\n    activePanelsStart = activePanelsEnd - activePanelsStart;\n    activePanelsStart = activePanelsStart < 0 ? 0 : activePanelsStart;\n\n    for ( i = activePanelsStart; i < activePanelsEnd && i < strip.panels.length; i++ ) {\n        element = strip.panels[i];\n        if ( !element.activePanel ) {\n            var miniTileSource;\n            var originalTileSource = strip.viewer.tileSources[i];\n            if (originalTileSource.referenceStripThumbnailUrl) {\n                miniTileSource = {\n                    type: 'image',\n                    url: originalTileSource.referenceStripThumbnailUrl\n                };\n            } else {\n                miniTileSource = originalTileSource;\n            }\n            miniViewer = new $.Viewer( {\n                id:                     element.id,\n                tileSources:            [miniTileSource],\n                element:                element,\n                navigatorSizeRatio:     strip.sizeRatio,\n                showNavigator:          false,\n                mouseNavEnabled:        false,\n                showNavigationControl:  false,\n                showSequenceControl:    false,\n                immediateRender:        true,\n                blendTime:              0,\n                animationTime:          0,\n                loadTilesWithAjax:      strip.viewer.loadTilesWithAjax,\n                ajaxHeaders:            strip.viewer.ajaxHeaders,\n                useCanvas:              strip.useCanvas\n            } );\n            // Allow pointer events to pass through miniViewer's canvas/container\n            //   elements so implicit pointer capture works on touch devices\n            $.setElementPointerEventsNone( miniViewer.canvas );\n            $.setElementPointerEventsNone( miniViewer.container );\n            // We'll use event delegation from the reference strip element instead of\n            //   handling events on every miniViewer\n            miniViewer.innerTracker.setTracking( false );\n            miniViewer.outerTracker.setTracking( false );\n\n            strip.miniViewers[element.id] = miniViewer;\n\n            element.activePanel = true;\n        }\n    }\n}\n\n\n/**\n * @private\n * @inner\n * @function\n */\nfunction onStripEnter( event ) {\n    var element = event.eventSource.element;\n\n    //$.setElementOpacity(element, 0.8);\n\n    //element.style.border = '1px solid #555';\n    //element.style.background = '#000';\n\n    if ( 'horizontal' === this.scroll ) {\n\n        //element.style.paddingTop = \"0px\";\n        element.style.marginBottom = \"0px\";\n\n    } else {\n\n        //element.style.paddingRight = \"0px\";\n        element.style.marginLeft = \"0px\";\n\n    }\n}\n\n\n/**\n * @private\n * @inner\n * @function\n */\nfunction onStripLeave( event ) {\n    var element = event.eventSource.element;\n\n    if ( 'horizontal' === this.scroll ) {\n\n        //element.style.paddingTop = \"10px\";\n        element.style.marginBottom = \"-\" + ( $.getElementSize( element ).y / 2 ) + \"px\";\n\n    } else {\n\n        //element.style.paddingRight = \"10px\";\n        element.style.marginLeft = \"-\" + ( $.getElementSize( element ).x / 2 ) + \"px\";\n\n    }\n}\n\n\n/**\n * @private\n * @inner\n * @function\n */\nfunction onKeyDown( event ) {\n    //console.log( event.keyCode );\n\n    if ( !event.ctrl && !event.alt && !event.meta ) {\n        switch ( event.keyCode ) {\n            case 38: //up arrow\n                onStripScroll.call( this, { eventSource: this.tracker, position: null, scroll: 1, shift: null } );\n                event.preventDefault = true;\n                break;\n            case 40: //down arrow\n                onStripScroll.call( this, { eventSource: this.tracker, position: null, scroll: -1, shift: null } );\n                event.preventDefault = true;\n                break;\n            case 37: //left arrow\n                onStripScroll.call( this, { eventSource: this.tracker, position: null, scroll: -1, shift: null } );\n                event.preventDefault = true;\n                break;\n            case 39: //right arrow\n                onStripScroll.call( this, { eventSource: this.tracker, position: null, scroll: 1, shift: null } );\n                event.preventDefault = true;\n                break;\n            default:\n                //console.log( 'navigator keycode %s', event.keyCode );\n                event.preventDefault = false;\n                break;\n        }\n    } else {\n        event.preventDefault = false;\n    }\n}\n\n\n/**\n * @private\n * @inner\n * @function\n */\nfunction onKeyPress( event ) {\n    //console.log( event.keyCode );\n\n    if ( !event.ctrl && !event.alt && !event.meta ) {\n        switch ( event.keyCode ) {\n            case 61: //=|+\n                onStripScroll.call( this, { eventSource: this.tracker, position: null, scroll: 1, shift: null } );\n                event.preventDefault = true;\n                break;\n            case 45: //-|_\n                onStripScroll.call( this, { eventSource: this.tracker, position: null, scroll: -1, shift: null } );\n                event.preventDefault = true;\n                break;\n            case 48: //0|)\n            case 119: //w\n            case 87: //W\n                onStripScroll.call( this, { eventSource: this.tracker, position: null, scroll: 1, shift: null } );\n                event.preventDefault = true;\n                break;\n            case 115: //s\n            case 83: //S\n                onStripScroll.call( this, { eventSource: this.tracker, position: null, scroll: -1, shift: null } );\n                event.preventDefault = true;\n                break;\n            case 97: //a\n                onStripScroll.call( this, { eventSource: this.tracker, position: null, scroll: -1, shift: null } );\n                event.preventDefault = true;\n                break;\n            case 100: //d\n                onStripScroll.call( this, { eventSource: this.tracker, position: null, scroll: 1, shift: null } );\n                event.preventDefault = true;\n                break;\n            default:\n                //console.log( 'navigator keycode %s', event.keyCode );\n                event.preventDefault = false;\n                break;\n        }\n    } else {\n        event.preventDefault = false;\n    }\n}\n\n}(OpenSeadragon));\n\n/*\n * OpenSeadragon - DisplayRect\n *\n * Copyright (C) 2009 CodePlex Foundation\n * Copyright (C) 2010-2013 OpenSeadragon contributors\n *\n * Redistribution and use in source and binary forms, with or without\n * modification, are permitted provided that the following conditions are\n * met:\n *\n * - Redistributions of source code must retain the above copyright notice,\n *   this list of conditions and the following disclaimer.\n *\n * - Redistributions in binary form must reproduce the above copyright\n *   notice, this list of conditions and the following disclaimer in the\n *   documentation and/or other materials provided with the distribution.\n *\n * - Neither the name of CodePlex Foundation nor the names of its\n *   contributors may be used to endorse or promote products derived from\n *   this software without specific prior written permission.\n *\n * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS\n * \"AS IS\" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT\n * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR\n * A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT\n * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,\n * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED\n * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR\n * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF\n * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING\n * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS\n * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.\n */\n\n(function( $ ){\n\n/**\n * @class DisplayRect\n * @classdesc A display rectangle is very similar to {@link OpenSeadragon.Rect} but adds two\n * fields, 'minLevel' and 'maxLevel' which denote the supported zoom levels\n * for this rectangle.\n *\n * @memberof OpenSeadragon\n * @extends OpenSeadragon.Rect\n * @param {Number} x The vector component 'x'.\n * @param {Number} y The vector component 'y'.\n * @param {Number} width The vector component 'height'.\n * @param {Number} height The vector component 'width'.\n * @param {Number} minLevel The lowest zoom level supported.\n * @param {Number} maxLevel The highest zoom level supported.\n */\n$.DisplayRect = function( x, y, width, height, minLevel, maxLevel ) {\n    $.Rect.apply( this, [ x, y, width, height ] );\n\n    /**\n     * The lowest zoom level supported.\n     * @member {Number} minLevel\n     * @memberof OpenSeadragon.DisplayRect#\n     */\n    this.minLevel = minLevel;\n    /**\n     * The highest zoom level supported.\n     * @member {Number} maxLevel\n     * @memberof OpenSeadragon.DisplayRect#\n     */\n    this.maxLevel = maxLevel;\n};\n\n$.extend( $.DisplayRect.prototype, $.Rect.prototype );\n\n}( OpenSeadragon ));\n\n/*\n * OpenSeadragon - Spring\n *\n * Copyright (C) 2009 CodePlex Foundation\n * Copyright (C) 2010-2013 OpenSeadragon contributors\n *\n * Redistribution and use in source and binary forms, with or without\n * modification, are permitted provided that the following conditions are\n * met:\n *\n * - Redistributions of source code must retain the above copyright notice,\n *   this list of conditions and the following disclaimer.\n *\n * - Redistributions in binary form must reproduce the above copyright\n *   notice, this list of conditions and the following disclaimer in the\n *   documentation and/or other materials provided with the distribution.\n *\n * - Neither the name of CodePlex Foundation nor the names of its\n *   contributors may be used to endorse or promote products derived from\n *   this software without specific prior written permission.\n *\n * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS\n * \"AS IS\" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT\n * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR\n * A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT\n * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,\n * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED\n * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR\n * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF\n * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING\n * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS\n * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.\n */\n\n(function( $ ){\n\n/**\n * @class Spring\n * @memberof OpenSeadragon\n * @param {Object} options - Spring configuration settings.\n * @param {Number} options.springStiffness - Spring stiffness. Must be greater than zero.\n * The closer to zero, the closer to linear animation.\n * @param {Number} options.animationTime - Animation duration per spring, in seconds.\n * Must be zero or greater.\n * @param {Number} [options.initial=0] - Initial value of spring.\n * @param {Boolean} [options.exponential=false] - Whether this spring represents\n * an exponential scale (such as zoom) and should be animated accordingly. Note that\n * exponential springs must have non-zero values.\n */\n$.Spring = function( options ) {\n    var args = arguments;\n\n    if( typeof ( options ) !== 'object' ){\n        //allows backward compatible use of ( initialValue, config ) as\n        //constructor parameters\n        options = {\n            initial: args.length && typeof ( args[ 0 ] ) === \"number\" ?\n                args[ 0 ] :\n                undefined,\n            /**\n             * Spring stiffness.\n             * @member {Number} springStiffness\n             * @memberof OpenSeadragon.Spring#\n             */\n            springStiffness: args.length > 1 ?\n                args[ 1 ].springStiffness :\n                5.0,\n            /**\n             * Animation duration per spring.\n             * @member {Number} animationTime\n             * @memberof OpenSeadragon.Spring#\n             */\n            animationTime: args.length > 1 ?\n                args[ 1 ].animationTime :\n                1.5\n        };\n    }\n\n    $.console.assert(typeof options.springStiffness === \"number\" && options.springStiffness !== 0,\n        \"[OpenSeadragon.Spring] options.springStiffness must be a non-zero number\");\n\n    $.console.assert(typeof options.animationTime === \"number\" && options.animationTime >= 0,\n        \"[OpenSeadragon.Spring] options.animationTime must be a number greater than or equal to 0\");\n\n    if (options.exponential) {\n        this._exponential = true;\n        delete options.exponential;\n    }\n\n    $.extend( true, this, options);\n\n    /**\n     * @member {Object} current\n     * @memberof OpenSeadragon.Spring#\n     * @property {Number} value\n     * @property {Number} time\n     */\n    this.current = {\n        value: typeof ( this.initial ) === \"number\" ?\n            this.initial :\n            (this._exponential ? 0 : 1),\n        time:  $.now() // always work in milliseconds\n    };\n\n    $.console.assert(!this._exponential || this.current.value !== 0,\n        \"[OpenSeadragon.Spring] value must be non-zero for exponential springs\");\n\n    /**\n     * @member {Object} start\n     * @memberof OpenSeadragon.Spring#\n     * @property {Number} value\n     * @property {Number} time\n     */\n    this.start = {\n        value: this.current.value,\n        time:  this.current.time\n    };\n\n    /**\n     * @member {Object} target\n     * @memberof OpenSeadragon.Spring#\n     * @property {Number} value\n     * @property {Number} time\n     */\n    this.target = {\n        value: this.current.value,\n        time:  this.current.time\n    };\n\n    if (this._exponential) {\n        this.start._logValue = Math.log(this.start.value);\n        this.target._logValue = Math.log(this.target.value);\n        this.current._logValue = Math.log(this.current.value);\n    }\n};\n\n/** @lends OpenSeadragon.Spring.prototype */\n$.Spring.prototype = {\n\n    /**\n     * @function\n     * @param {Number} target\n     */\n    resetTo: function( target ) {\n        $.console.assert(!this._exponential || target !== 0,\n            \"[OpenSeadragon.Spring.resetTo] target must be non-zero for exponential springs\");\n\n        this.start.value = this.target.value = this.current.value = target;\n        this.start.time = this.target.time = this.current.time = $.now();\n\n        if (this._exponential) {\n            this.start._logValue = Math.log(this.start.value);\n            this.target._logValue = Math.log(this.target.value);\n            this.current._logValue = Math.log(this.current.value);\n        }\n    },\n\n    /**\n     * @function\n     * @param {Number} target\n     */\n    springTo: function( target ) {\n        $.console.assert(!this._exponential || target !== 0,\n            \"[OpenSeadragon.Spring.springTo] target must be non-zero for exponential springs\");\n\n        this.start.value  = this.current.value;\n        this.start.time   = this.current.time;\n        this.target.value = target;\n        this.target.time  = this.start.time + 1000 * this.animationTime;\n\n        if (this._exponential) {\n            this.start._logValue = Math.log(this.start.value);\n            this.target._logValue = Math.log(this.target.value);\n        }\n    },\n\n    /**\n     * @function\n     * @param {Number} delta\n     */\n    shiftBy: function( delta ) {\n        this.start.value  += delta;\n        this.target.value += delta;\n\n        if (this._exponential) {\n            $.console.assert(this.target.value !== 0 && this.start.value !== 0,\n                \"[OpenSeadragon.Spring.shiftBy] spring value must be non-zero for exponential springs\");\n\n            this.start._logValue = Math.log(this.start.value);\n            this.target._logValue = Math.log(this.target.value);\n        }\n    },\n\n    setExponential: function(value) {\n        this._exponential = value;\n\n        if (this._exponential) {\n            $.console.assert(this.current.value !== 0 && this.target.value !== 0 && this.start.value !== 0,\n                \"[OpenSeadragon.Spring.setExponential] spring value must be non-zero for exponential springs\");\n\n            this.start._logValue = Math.log(this.start.value);\n            this.target._logValue = Math.log(this.target.value);\n            this.current._logValue = Math.log(this.current.value);\n        }\n    },\n\n    /**\n     * @function\n     * @returns true if the value got updated, false otherwise\n     */\n    update: function() {\n        this.current.time  = $.now();\n\n        var startValue, targetValue;\n        if (this._exponential) {\n            startValue = this.start._logValue;\n            targetValue = this.target._logValue;\n        } else {\n            startValue = this.start.value;\n            targetValue = this.target.value;\n        }\n\n        var currentValue = (this.current.time >= this.target.time) ?\n            targetValue :\n            startValue +\n                ( targetValue - startValue ) *\n                transform(\n                    this.springStiffness,\n                    ( this.current.time - this.start.time ) /\n                    ( this.target.time - this.start.time )\n                );\n\n        var oldValue = this.current.value;\n        if (this._exponential) {\n            this.current.value = Math.exp(currentValue);\n        } else {\n            this.current.value = currentValue;\n        }\n\n        return oldValue !== this.current.value;\n    },\n\n    /**\n     * Returns whether the spring is at the target value\n     * @function\n     * @returns {Boolean} True if at target value, false otherwise\n     */\n    isAtTargetValue: function() {\n        return this.current.value === this.target.value;\n    }\n};\n\n/**\n * @private\n */\nfunction transform( stiffness, x ) {\n    return ( 1.0 - Math.exp( stiffness * -x ) ) /\n        ( 1.0 - Math.exp( -stiffness ) );\n}\n\n}( OpenSeadragon ));\n\n/*\n * OpenSeadragon - ImageLoader\n *\n * Copyright (C) 2009 CodePlex Foundation\n * Copyright (C) 2010-2013 OpenSeadragon contributors\n\n * Redistribution and use in source and binary forms, with or without\n * modification, are permitted provided that the following conditions are\n * met:\n *\n * - Redistributions of source code must retain the above copyright notice,\n *   this list of conditions and the following disclaimer.\n *\n * - Redistributions in binary form must reproduce the above copyright\n *   notice, this list of conditions and the following disclaimer in the\n *   documentation and/or other materials provided with the distribution.\n *\n * - Neither the name of CodePlex Foundation nor the names of its\n *   contributors may be used to endorse or promote products derived from\n *   this software without specific prior written permission.\n *\n * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS\n * \"AS IS\" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT\n * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR\n * A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT\n * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,\n * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED\n * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR\n * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF\n * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING\n * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS\n * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.\n */\n\n(function($){\n\n/**\n * @private\n * @class ImageJob\n * @classdesc Handles downloading of a single image.\n * @param {Object} options - Options for this ImageJob.\n * @param {String} [options.src] - URL of image to download.\n * @param {String} [options.loadWithAjax] - Whether to load this image with AJAX.\n * @param {String} [options.ajaxHeaders] - Headers to add to the image request if using AJAX.\n * @param {String} [options.crossOriginPolicy] - CORS policy to use for downloads\n * @param {String} [options.postData] - HTTP POST data (usually but not necessarily in k=v&k2=v2... form,\n *      see TileSrouce::getPostData) or null\n * @param {Function} [options.callback] - Called once image has been downloaded.\n * @param {Function} [options.abort] - Called when this image job is aborted.\n * @param {Number} [options.timeout] - The max number of milliseconds that this image job may take to complete.\n */\nfunction ImageJob (options) {\n\n    $.extend(true, this, {\n        timeout: $.DEFAULT_SETTINGS.timeout,\n        jobId: null\n    }, options);\n\n    /**\n     * Image object which will contain downloaded image.\n     * @member {Image} image\n     * @memberof OpenSeadragon.ImageJob#\n     */\n    this.image = null;\n}\n\nImageJob.prototype = {\n    errorMsg: null,\n\n    /**\n     * Starts the image job.\n     * @method\n     */\n    start: function(){\n        var self = this;\n        var selfAbort = this.abort;\n\n        this.image = new Image();\n\n        this.image.onload = function(){\n            self.finish(true);\n        };\n        this.image.onabort = this.image.onerror = function() {\n            self.errorMsg = \"Image load aborted\";\n            self.finish(false);\n        };\n\n        this.jobId = window.setTimeout(function(){\n            self.errorMsg = \"Image load exceeded timeout (\" + self.timeout + \" ms)\";\n            self.finish(false);\n        }, this.timeout);\n\n        // Load the tile with an AJAX request if the loadWithAjax option is\n        // set. Otherwise load the image by setting the source proprety of the image object.\n        if (this.loadWithAjax) {\n            this.request = $.makeAjaxRequest({\n                url: this.src,\n                withCredentials: this.ajaxWithCredentials,\n                headers: this.ajaxHeaders,\n                responseType: \"arraybuffer\",\n                postData: this.postData,\n                success: function(request) {\n                    var blb;\n                    // Make the raw data into a blob.\n                    // BlobBuilder fallback adapted from\n                    // http://stackoverflow.com/questions/15293694/blob-constructor-browser-compatibility\n                    try {\n                        blb = new window.Blob([request.response]);\n                    } catch (e) {\n                        var BlobBuilder = (\n                            window.BlobBuilder ||\n                            window.WebKitBlobBuilder ||\n                            window.MozBlobBuilder ||\n                            window.MSBlobBuilder\n                        );\n                        if (e.name === 'TypeError' && BlobBuilder) {\n                            var bb = new BlobBuilder();\n                            bb.append(request.response);\n                            blb = bb.getBlob();\n                        }\n                    }\n                    // If the blob is empty for some reason consider the image load a failure.\n                    if (blb.size === 0) {\n                        self.errorMsg = \"Empty image response.\";\n                        self.finish(false);\n                    }\n                    // Create a URL for the blob data and make it the source of the image object.\n                    // This will still trigger Image.onload to indicate a successful tile load.\n                    var url = (window.URL || window.webkitURL).createObjectURL(blb);\n                    self.image.src = url;\n                },\n                error: function(request) {\n                    self.errorMsg = \"Image load aborted - XHR error: Ajax returned \" + request.status;\n                    self.finish(false);\n                }\n            });\n\n            // Provide a function to properly abort the request.\n            this.abort = function() {\n                self.request.abort();\n\n                // Call the existing abort function if available\n                if (typeof selfAbort === \"function\") {\n                    selfAbort();\n                }\n            };\n        } else {\n            if (this.crossOriginPolicy !== false) {\n                this.image.crossOrigin = this.crossOriginPolicy;\n            }\n\n            this.image.src = this.src;\n        }\n    },\n\n    finish: function(successful) {\n        this.image.onload = this.image.onerror = this.image.onabort = null;\n        if (!successful) {\n            this.image = null;\n        }\n\n        if (this.jobId) {\n            window.clearTimeout(this.jobId);\n        }\n\n        this.callback(this);\n    }\n\n};\n\n/**\n * @class ImageLoader\n * @memberof OpenSeadragon\n * @classdesc Handles downloading of a set of images using asynchronous queue pattern.\n * You generally won't have to interact with the ImageLoader directly.\n * @param {Object} options - Options for this ImageLoader.\n * @param {Number} [options.jobLimit] - The number of concurrent image requests. See imageLoaderLimit in {@link OpenSeadragon.Options} for details.\n * @param {Number} [options.timeout] - The max number of milliseconds that an image job may take to complete.\n */\n$.ImageLoader = function(options) {\n\n    $.extend(true, this, {\n        jobLimit:       $.DEFAULT_SETTINGS.imageLoaderLimit,\n        timeout:        $.DEFAULT_SETTINGS.timeout,\n        jobQueue:       [],\n        jobsInProgress: 0\n    }, options);\n\n};\n\n/** @lends OpenSeadragon.ImageLoader.prototype */\n$.ImageLoader.prototype = {\n\n    /**\n     * Add an unloaded image to the loader queue.\n     * @method\n     * @param {Object} options - Options for this job.\n     * @param {String} [options.src] - URL of image to download.\n     * @param {String} [options.loadWithAjax] - Whether to load this image with AJAX.\n     * @param {String} [options.ajaxHeaders] - Headers to add to the image request if using AJAX.\n     * @param {String|Boolean} [options.crossOriginPolicy] - CORS policy to use for downloads\n     * @param {String} [options.postData] - POST parameters (usually but not necessarily in k=v&k2=v2... form,\n     *      see TileSrouce::getPostData) or null\n     * @param {Boolean} [options.ajaxWithCredentials] - Whether to set withCredentials on AJAX\n     *      requests.\n     * @param {Function} [options.callback] - Called once image has been downloaded.\n     * @param {Function} [options.abort] - Called when this image job is aborted.\n     */\n    addJob: function(options) {\n        var _this = this,\n            complete = function(job) {\n                completeJob(_this, job, options.callback);\n            },\n            jobOptions = {\n                src: options.src,\n                loadWithAjax: options.loadWithAjax,\n                ajaxHeaders: options.loadWithAjax ? options.ajaxHeaders : null,\n                crossOriginPolicy: options.crossOriginPolicy,\n                ajaxWithCredentials: options.ajaxWithCredentials,\n                postData: options.postData,\n                callback: complete,\n                abort: options.abort,\n                timeout: this.timeout\n            },\n            newJob = new ImageJob(jobOptions);\n\n        if ( !this.jobLimit || this.jobsInProgress < this.jobLimit ) {\n            newJob.start();\n            this.jobsInProgress++;\n        }\n        else {\n            this.jobQueue.push( newJob );\n        }\n    },\n\n    /**\n     * Clear any unstarted image loading jobs from the queue.\n     * @method\n     */\n    clear: function() {\n        for( var i = 0; i < this.jobQueue.length; i++ ) {\n            var job = this.jobQueue[i];\n            if ( typeof job.abort === \"function\" ) {\n                job.abort();\n            }\n        }\n\n        this.jobQueue = [];\n    }\n};\n\n/**\n * Cleans up ImageJob once completed.\n * @method\n * @private\n * @param loader - ImageLoader used to start job.\n * @param job - The ImageJob that has completed.\n * @param callback - Called once cleanup is finished.\n */\nfunction completeJob(loader, job, callback) {\n    var nextJob;\n\n    loader.jobsInProgress--;\n\n    if ((!loader.jobLimit || loader.jobsInProgress < loader.jobLimit) && loader.jobQueue.length > 0) {\n        nextJob = loader.jobQueue.shift();\n        nextJob.start();\n        loader.jobsInProgress++;\n    }\n\n    callback(job.image, job.errorMsg, job.request);\n}\n\n}(OpenSeadragon));\n\n/*\n * OpenSeadragon - Tile\n *\n * Copyright (C) 2009 CodePlex Foundation\n * Copyright (C) 2010-2013 OpenSeadragon contributors\n *\n * Redistribution and use in source and binary forms, with or without\n * modification, are permitted provided that the following conditions are\n * met:\n *\n * - Redistributions of source code must retain the above copyright notice,\n *   this list of conditions and the following disclaimer.\n *\n * - Redistributions in binary form must reproduce the above copyright\n *   notice, this list of conditions and the following disclaimer in the\n *   documentation and/or other materials provided with the distribution.\n *\n * - Neither the name of CodePlex Foundation nor the names of its\n *   contributors may be used to endorse or promote products derived from\n *   this software without specific prior written permission.\n *\n * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS\n * \"AS IS\" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT\n * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR\n * A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT\n * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,\n * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED\n * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR\n * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF\n * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING\n * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS\n * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.\n */\n\n(function( $ ){\n\n/**\n * @class Tile\n * @memberof OpenSeadragon\n * @param {Number} level The zoom level this tile belongs to.\n * @param {Number} x The vector component 'x'.\n * @param {Number} y The vector component 'y'.\n * @param {OpenSeadragon.Rect} bounds Where this tile fits, in normalized\n *      coordinates.\n * @param {Boolean} exists Is this tile a part of a sparse image? ( Also has\n *      this tile failed to load? )\n * @param {String} url The URL of this tile's image.\n * @param {CanvasRenderingContext2D} context2D The context2D of this tile if it\n *      is provided directly by the tile source.\n * @param {Boolean} loadWithAjax Whether this tile image should be loaded with an AJAX request .\n * @param {Object} ajaxHeaders The headers to send with this tile's AJAX request (if applicable).\n * @param {OpenSeadragon.Rect} sourceBounds The portion of the tile to use as the source of the\n *      drawing operation, in pixels. Note that this only works when drawing with canvas; when drawing\n *      with HTML the entire tile is always used.\n * @param {String} postData HTTP POST data (usually but not necessarily in k=v&k2=v2... form,\n *      see TileSrouce::getPostData) or null\n * @param {String} cacheKey key to act as a tile cache, must be unique for tiles with unique image data\n */\n$.Tile = function(level, x, y, bounds, exists, url, context2D, loadWithAjax, ajaxHeaders, sourceBounds, postData, cacheKey) {\n    /**\n     * The zoom level this tile belongs to.\n     * @member {Number} level\n     * @memberof OpenSeadragon.Tile#\n     */\n    this.level   = level;\n    /**\n     * The vector component 'x'.\n     * @member {Number} x\n     * @memberof OpenSeadragon.Tile#\n     */\n    this.x       = x;\n    /**\n     * The vector component 'y'.\n     * @member {Number} y\n     * @memberof OpenSeadragon.Tile#\n     */\n    this.y       = y;\n    /**\n     * Where this tile fits, in normalized coordinates\n     * @member {OpenSeadragon.Rect} bounds\n     * @memberof OpenSeadragon.Tile#\n     */\n    this.bounds  = bounds;\n    /**\n    * The portion of the tile to use as the source of the drawing operation, in pixels. Note that\n    * this only works when drawing with canvas; when drawing with HTML the entire tile is always used.\n    * @member {OpenSeadragon.Rect} sourceBounds\n    * @memberof OpenSeadragon.Tile#\n    */\n    this.sourceBounds = sourceBounds;\n    /**\n     * Is this tile a part of a sparse image? Also has this tile failed to load?\n     * @member {Boolean} exists\n     * @memberof OpenSeadragon.Tile#\n     */\n    this.exists  = exists;\n    /**\n     * The URL of this tile's image.\n     * @member {String} url\n     * @memberof OpenSeadragon.Tile#\n     */\n    this.url     = url;\n    /**\n     * Post parameters for this tile. For example, it can be an URL-encoded string\n     * in k1=v1&k2=v2... format, or a JSON, or a FormData instance... or null if no POST request used\n     * @member {String} postData HTTP POST data (usually but not necessarily in k=v&k2=v2... form,\n     *      see TileSrouce::getPostData) or null\n     * @memberof OpenSeadragon.Tile#\n     */\n    this.postData  = postData;\n    /**\n     * The context2D of this tile if it is provided directly by the tile source.\n     * @member {CanvasRenderingContext2D} context2D\n     * @memberOf OpenSeadragon.Tile#\n     */\n    this.context2D = context2D;\n    /**\n     * Whether to load this tile's image with an AJAX request.\n     * @member {Boolean} loadWithAjax\n     * @memberof OpenSeadragon.Tile#\n     */\n    this.loadWithAjax = loadWithAjax;\n    /**\n     * The headers to be used in requesting this tile's image.\n     * Only used if loadWithAjax is set to true.\n     * @member {Object} ajaxHeaders\n     * @memberof OpenSeadragon.Tile#\n     */\n    this.ajaxHeaders = ajaxHeaders;\n    /**\n     * The unique cache key for this tile.\n     * @member {String} cacheKey\n     * @memberof OpenSeadragon.Tile#\n     */\n    if (cacheKey === undefined) {\n        $.console.error(\"Tile constructor needs 'cacheKey' variable: creation tile cache\" +\n            \" in Tile class is deprecated. TileSource.prototype.getTileHashKey will be used.\");\n        cacheKey = $.TileSource.prototype.getTileHashKey(level, x, y, url, ajaxHeaders, postData);\n    }\n    this.cacheKey = cacheKey;\n\n    /**\n     * Is this tile loaded?\n     * @member {Boolean} loaded\n     * @memberof OpenSeadragon.Tile#\n     */\n    this.loaded  = false;\n    /**\n     * Is this tile loading?\n     * @member {Boolean} loading\n     * @memberof OpenSeadragon.Tile#\n     */\n    this.loading = false;\n\n    /**\n     * The HTML div element for this tile\n     * @member {Element} element\n     * @memberof OpenSeadragon.Tile#\n     */\n    this.element    = null;\n    /**\n     * The HTML img element for this tile.\n     * @member {Element} imgElement\n     * @memberof OpenSeadragon.Tile#\n     */\n    this.imgElement = null;\n    /**\n     * The Image object for this tile.\n     * @member {Object} image\n     * @memberof OpenSeadragon.Tile#\n     */\n    this.image      = null;\n\n    /**\n     * The alias of this.element.style.\n     * @member {String} style\n     * @memberof OpenSeadragon.Tile#\n     */\n    this.style      = null;\n    /**\n     * This tile's position on screen, in pixels.\n     * @member {OpenSeadragon.Point} position\n     * @memberof OpenSeadragon.Tile#\n     */\n    this.position   = null;\n    /**\n     * This tile's size on screen, in pixels.\n     * @member {OpenSeadragon.Point} size\n     * @memberof OpenSeadragon.Tile#\n     */\n    this.size       = null;\n    /**\n     * Whether to flip the tile when rendering.\n     * @member {Boolean} flipped\n     * @memberof OpenSeadragon.Tile#\n     */\n    this.flipped    = false;\n    /**\n     * The start time of this tile's blending.\n     * @member {Number} blendStart\n     * @memberof OpenSeadragon.Tile#\n     */\n    this.blendStart = null;\n    /**\n     * The current opacity this tile should be.\n     * @member {Number} opacity\n     * @memberof OpenSeadragon.Tile#\n     */\n    this.opacity    = null;\n    /**\n     * The squared distance of this tile to the viewport center.\n     * Use for comparing tiles.\n     * @private\n     * @member {Number} squaredDistance\n     * @memberof OpenSeadragon.Tile#\n     */\n    this.squaredDistance   = null;\n    /**\n     * The visibility score of this tile.\n     * @member {Number} visibility\n     * @memberof OpenSeadragon.Tile#\n     */\n    this.visibility = null;\n\n    /**\n     * Whether this tile is currently being drawn.\n     * @member {Boolean} beingDrawn\n     * @memberof OpenSeadragon.Tile#\n     */\n    this.beingDrawn     = false;\n\n    /**\n     * Timestamp the tile was last touched.\n     * @member {Number} lastTouchTime\n     * @memberof OpenSeadragon.Tile#\n     */\n    this.lastTouchTime  = 0;\n\n    /**\n     * Whether this tile is in the right-most column for its level.\n     * @member {Boolean} isRightMost\n     * @memberof OpenSeadragon.Tile#\n     */\n    this.isRightMost = false;\n\n    /**\n     * Whether this tile is in the bottom-most row for its level.\n     * @member {Boolean} isBottomMost\n     * @memberof OpenSeadragon.Tile#\n     */\n    this.isBottomMost = false;\n};\n\n/** @lends OpenSeadragon.Tile.prototype */\n$.Tile.prototype = {\n\n    /**\n     * Provides a string representation of this tiles level and (x,y)\n     * components.\n     * @function\n     * @returns {String}\n     */\n    toString: function() {\n        return this.level + \"/\" + this.x + \"_\" + this.y;\n    },\n\n    // private\n    _hasTransparencyChannel: function() {\n        return !!this.context2D || this.url.match('.png');\n    },\n\n    /**\n     * Renders the tile in an html container.\n     * @function\n     * @param {Element} container\n     */\n    drawHTML: function( container ) {\n        if (!this.cacheImageRecord) {\n            $.console.warn(\n                '[Tile.drawHTML] attempting to draw tile %s when it\\'s not cached',\n                this.toString());\n            return;\n        }\n\n        if ( !this.loaded ) {\n            $.console.warn(\n                \"Attempting to draw tile %s when it's not yet loaded.\",\n                this.toString()\n            );\n            return;\n        }\n\n        //EXPERIMENTAL - trying to figure out how to scale the container\n        //               content during animation of the container size.\n\n        if ( !this.element ) {\n            this.element                              = $.makeNeutralElement( \"div\" );\n            this.imgElement                           = this.cacheImageRecord.getImage().cloneNode();\n            this.imgElement.style.msInterpolationMode = \"nearest-neighbor\";\n            this.imgElement.style.width               = \"100%\";\n            this.imgElement.style.height              = \"100%\";\n\n            this.style                     = this.element.style;\n            this.style.position            = \"absolute\";\n        }\n        if ( this.element.parentNode !== container ) {\n            container.appendChild( this.element );\n        }\n        if ( this.imgElement.parentNode !== this.element ) {\n            this.element.appendChild( this.imgElement );\n        }\n\n        this.style.top     = this.position.y + \"px\";\n        this.style.left    = this.position.x + \"px\";\n        this.style.height  = this.size.y + \"px\";\n        this.style.width   = this.size.x + \"px\";\n\n        if (this.flipped) {\n            this.style.transform = \"scaleX(-1)\";\n        }\n\n        $.setElementOpacity( this.element, this.opacity );\n    },\n\n    /**\n     * Renders the tile in a canvas-based context.\n     * @function\n     * @param {Canvas} context\n     * @param {Function} drawingHandler - Method for firing the drawing event.\n     * drawingHandler({context, tile, rendered})\n     * where <code>rendered</code> is the context with the pre-drawn image.\n     * @param {Number} [scale=1] - Apply a scale to position and size\n     * @param {OpenSeadragon.Point} [translate] - A translation vector\n     * @param {Boolean} [shouldRoundPositionAndSize] - Tells whether to round\n     * position and size of tiles supporting alpha channel in non-transparency\n     * context.\n     */\n    drawCanvas: function( context, drawingHandler, scale, translate, shouldRoundPositionAndSize ) {\n\n        var position = this.position.times($.pixelDensityRatio),\n            size     = this.size.times($.pixelDensityRatio),\n            rendered;\n\n        if (!this.context2D && !this.cacheImageRecord) {\n            $.console.warn(\n                '[Tile.drawCanvas] attempting to draw tile %s when it\\'s not cached',\n                this.toString());\n            return;\n        }\n\n        rendered = this.context2D || this.cacheImageRecord.getRenderedContext();\n\n        if ( !this.loaded || !rendered ){\n            $.console.warn(\n                \"Attempting to draw tile %s when it's not yet loaded.\",\n                this.toString()\n            );\n\n            return;\n        }\n\n        context.save();\n\n        context.globalAlpha = this.opacity;\n\n        if (typeof scale === 'number' && scale !== 1) {\n            // draw tile at a different scale\n            position = position.times(scale);\n            size = size.times(scale);\n        }\n\n        if (translate instanceof $.Point) {\n            // shift tile position slightly\n            position = position.plus(translate);\n        }\n\n        //if we are supposed to be rendering fully opaque rectangle,\n        //ie its done fading or fading is turned off, and if we are drawing\n        //an image with an alpha channel, then the only way\n        //to avoid seeing the tile underneath is to clear the rectangle\n        if (context.globalAlpha === 1 && this._hasTransparencyChannel()) {\n            if (shouldRoundPositionAndSize) {\n                // Round to the nearest whole pixel so we don't get seams from overlap.\n                position.x = Math.round(position.x);\n                position.y = Math.round(position.y);\n                size.x = Math.round(size.x);\n                size.y = Math.round(size.y);\n            }\n\n            //clearing only the inside of the rectangle occupied\n            //by the png prevents edge flikering\n            context.clearRect(\n                position.x,\n                position.y,\n                size.x,\n                size.y\n            );\n        }\n\n        // This gives the application a chance to make image manipulation\n        // changes as we are rendering the image\n        drawingHandler({context: context, tile: this, rendered: rendered});\n\n        var sourceWidth, sourceHeight;\n        if (this.sourceBounds) {\n            sourceWidth = Math.min(this.sourceBounds.width, rendered.canvas.width);\n            sourceHeight = Math.min(this.sourceBounds.height, rendered.canvas.height);\n        } else {\n            sourceWidth = rendered.canvas.width;\n            sourceHeight = rendered.canvas.height;\n        }\n\n        context.translate(position.x + size.x / 2, 0);\n        if (this.flipped) {\n            context.scale(-1, 1);\n        }\n        context.drawImage(\n            rendered.canvas,\n            0,\n            0,\n            sourceWidth,\n            sourceHeight,\n            -size.x / 2,\n            position.y,\n            size.x,\n            size.y\n        );\n\n        context.restore();\n    },\n\n    /**\n     * Get the ratio between current and original size.\n     * @function\n     * @return {Float}\n     */\n    getScaleForEdgeSmoothing: function() {\n        var context;\n        if (this.cacheImageRecord) {\n            context = this.cacheImageRecord.getRenderedContext();\n        } else if (this.context2D) {\n            context = this.context2D;\n        } else {\n            $.console.warn(\n                '[Tile.drawCanvas] attempting to get tile scale %s when tile\\'s not cached',\n                this.toString());\n            return 1;\n        }\n        return context.canvas.width / (this.size.x * $.pixelDensityRatio);\n    },\n\n    /**\n     * Get a translation vector that when applied to the tile position produces integer coordinates.\n     * Needed to avoid swimming and twitching.\n     * @function\n     * @param {Number} [scale=1] - Scale to be applied to position.\n     * @return {OpenSeadragon.Point}\n     */\n    getTranslationForEdgeSmoothing: function(scale, canvasSize, sketchCanvasSize) {\n        // The translation vector must have positive values, otherwise the image goes a bit off\n        // the sketch canvas to the top and left and we must use negative coordinates to repaint it\n        // to the main canvas. In that case, some browsers throw:\n        // INDEX_SIZE_ERR: DOM Exception 1: Index or size was negative, or greater than the allowed value.\n        var x = Math.max(1, Math.ceil((sketchCanvasSize.x - canvasSize.x) / 2));\n        var y = Math.max(1, Math.ceil((sketchCanvasSize.y - canvasSize.y) / 2));\n        return new $.Point(x, y).minus(\n            this.position\n                .times($.pixelDensityRatio)\n                .times(scale || 1)\n                .apply(function(x) {\n                    return x % 1;\n                })\n        );\n    },\n\n    /**\n     * Removes tile from its container.\n     * @function\n     */\n    unload: function() {\n        if ( this.imgElement && this.imgElement.parentNode ) {\n            this.imgElement.parentNode.removeChild( this.imgElement );\n        }\n        if ( this.element && this.element.parentNode ) {\n            this.element.parentNode.removeChild( this.element );\n        }\n\n        this.element    = null;\n        this.imgElement = null;\n        this.loaded     = false;\n        this.loading    = false;\n    }\n};\n\n}( OpenSeadragon ));\n\n/*\n * OpenSeadragon - Overlay\n *\n * Copyright (C) 2009 CodePlex Foundation\n * Copyright (C) 2010-2013 OpenSeadragon contributors\n *\n * Redistribution and use in source and binary forms, with or without\n * modification, are permitted provided that the following conditions are\n * met:\n *\n * - Redistributions of source code must retain the above copyright notice,\n *   this list of conditions and the following disclaimer.\n *\n * - Redistributions in binary form must reproduce the above copyright\n *   notice, this list of conditions and the following disclaimer in the\n *   documentation and/or other materials provided with the distribution.\n *\n * - Neither the name of CodePlex Foundation nor the names of its\n *   contributors may be used to endorse or promote products derived from\n *   this software without specific prior written permission.\n *\n * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS\n * \"AS IS\" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT\n * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR\n * A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT\n * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,\n * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED\n * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR\n * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF\n * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING\n * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS\n * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.\n */\n\n(function($) {\n\n    /**\n     * An enumeration of positions that an overlay may be assigned relative to\n     * the viewport.\n     * It is identical to OpenSeadragon.Placement but is kept for backward\n     * compatibility.\n     * @member OverlayPlacement\n     * @memberof OpenSeadragon\n     * @see OpenSeadragon.Placement\n     * @static\n     * @readonly\n     * @type {Object}\n     * @property {Number} CENTER\n     * @property {Number} TOP_LEFT\n     * @property {Number} TOP\n     * @property {Number} TOP_RIGHT\n     * @property {Number} RIGHT\n     * @property {Number} BOTTOM_RIGHT\n     * @property {Number} BOTTOM\n     * @property {Number} BOTTOM_LEFT\n     * @property {Number} LEFT\n     */\n    $.OverlayPlacement = $.Placement;\n\n    /**\n     * An enumeration of possible ways to handle overlays rotation\n     * @member OverlayRotationMode\n     * @memberOf OpenSeadragon\n     * @static\n     * @readonly\n     * @property {Number} NO_ROTATION The overlay ignore the viewport rotation.\n     * @property {Number} EXACT The overlay use CSS 3 transforms to rotate with\n     * the viewport. If the overlay contains text, it will get rotated as well.\n     * @property {Number} BOUNDING_BOX The overlay adjusts for rotation by\n     * taking the size of the bounding box of the rotated bounds.\n     * Only valid for overlays with Rect location and scalable in both directions.\n     */\n    $.OverlayRotationMode = $.freezeObject({\n        NO_ROTATION: 1,\n        EXACT: 2,\n        BOUNDING_BOX: 3\n    });\n\n    /**\n     * @class Overlay\n     * @classdesc Provides a way to float an HTML element on top of the viewer element.\n     *\n     * @memberof OpenSeadragon\n     * @param {Object} options\n     * @param {Element} options.element\n     * @param {OpenSeadragon.Point|OpenSeadragon.Rect} options.location - The\n     * location of the overlay on the image. If a {@link OpenSeadragon.Point}\n     * is specified, the overlay will be located at this location with respect\n     * to the placement option. If a {@link OpenSeadragon.Rect} is specified,\n     * the overlay will be placed at this location with the corresponding width\n     * and height and placement TOP_LEFT.\n     * @param {OpenSeadragon.Placement} [options.placement=OpenSeadragon.Placement.TOP_LEFT]\n     * Defines what part of the overlay should be at the specified options.location\n     * @param {OpenSeadragon.Overlay.OnDrawCallback} [options.onDraw]\n     * @param {Boolean} [options.checkResize=true] Set to false to avoid to\n     * check the size of the overlay every time it is drawn in the directions\n     * which are not scaled. It will improve performances but will cause a\n     * misalignment if the overlay size changes.\n     * @param {Number} [options.width] The width of the overlay in viewport\n     * coordinates. If specified, the width of the overlay will be adjusted when\n     * the zoom changes.\n     * @param {Number} [options.height] The height of the overlay in viewport\n     * coordinates. If specified, the height of the overlay will be adjusted when\n     * the zoom changes.\n     * @param {Boolean} [options.rotationMode=OpenSeadragon.OverlayRotationMode.EXACT]\n     * How to handle the rotation of the viewport.\n     */\n    $.Overlay = function(element, location, placement) {\n\n        /**\n         * onDraw callback signature used by {@link OpenSeadragon.Overlay}.\n         *\n         * @callback OnDrawCallback\n         * @memberof OpenSeadragon.Overlay\n         * @param {OpenSeadragon.Point} position\n         * @param {OpenSeadragon.Point} size\n         * @param {Element} element\n         */\n\n        var options;\n        if ($.isPlainObject(element)) {\n            options = element;\n        } else {\n            options = {\n                element: element,\n                location: location,\n                placement: placement\n            };\n        }\n\n        this.element = options.element;\n        this.style = options.element.style;\n        this._init(options);\n    };\n\n    /** @lends OpenSeadragon.Overlay.prototype */\n    $.Overlay.prototype = {\n\n        // private\n        _init: function(options) {\n            this.location = options.location;\n            this.placement = options.placement === undefined ?\n                $.Placement.TOP_LEFT : options.placement;\n            this.onDraw = options.onDraw;\n            this.checkResize = options.checkResize === undefined ?\n                true : options.checkResize;\n\n            // When this.width is not null, the overlay get scaled horizontally\n            this.width = options.width === undefined ? null : options.width;\n\n            // When this.height is not null, the overlay get scaled vertically\n            this.height = options.height === undefined ? null : options.height;\n\n            this.rotationMode = options.rotationMode || $.OverlayRotationMode.EXACT;\n\n            // Having a rect as location is a syntactic sugar\n            if (this.location instanceof $.Rect) {\n                this.width = this.location.width;\n                this.height = this.location.height;\n                this.location = this.location.getTopLeft();\n                this.placement = $.Placement.TOP_LEFT;\n            }\n\n            // Deprecated properties kept for backward compatibility.\n            this.scales = this.width !== null && this.height !== null;\n            this.bounds = new $.Rect(\n                this.location.x, this.location.y, this.width, this.height);\n            this.position = this.location;\n        },\n\n        /**\n         * Internal function to adjust the position of an overlay\n         * depending on it size and placement.\n         * @function\n         * @param {OpenSeadragon.Point} position\n         * @param {OpenSeadragon.Point} size\n         */\n        adjust: function(position, size) {\n            var properties = $.Placement.properties[this.placement];\n            if (!properties) {\n                return;\n            }\n            if (properties.isHorizontallyCentered) {\n                position.x -= size.x / 2;\n            } else if (properties.isRight) {\n                position.x -= size.x;\n            }\n            if (properties.isVerticallyCentered) {\n                position.y -= size.y / 2;\n            } else if (properties.isBottom) {\n                position.y -= size.y;\n            }\n        },\n\n        /**\n         * @function\n         */\n        destroy: function() {\n            var element = this.element;\n            var style = this.style;\n\n            if (element.parentNode) {\n                element.parentNode.removeChild(element);\n                //this should allow us to preserve overlays when required between\n                //pages\n                if (element.prevElementParent) {\n                    style.display = 'none';\n                    //element.prevElementParent.insertBefore(\n                    //    element,\n                    //    element.prevNextSibling\n                    //);\n                    document.body.appendChild(element);\n                }\n            }\n\n            // clear the onDraw callback\n            this.onDraw = null;\n\n            style.top = \"\";\n            style.left = \"\";\n            style.position = \"\";\n\n            if (this.width !== null) {\n                style.width = \"\";\n            }\n            if (this.height !== null) {\n                style.height = \"\";\n            }\n            var transformOriginProp = $.getCssPropertyWithVendorPrefix(\n                'transformOrigin');\n            var transformProp = $.getCssPropertyWithVendorPrefix(\n                'transform');\n            if (transformOriginProp && transformProp) {\n                style[transformOriginProp] = \"\";\n                style[transformProp] = \"\";\n            }\n        },\n\n        /**\n         * @function\n         * @param {Element} container\n         */\n        drawHTML: function(container, viewport) {\n            var element = this.element;\n            if (element.parentNode !== container) {\n                //save the source parent for later if we need it\n                element.prevElementParent = element.parentNode;\n                element.prevNextSibling = element.nextSibling;\n                container.appendChild(element);\n\n                // have to set position before calculating size, fix #1116\n                this.style.position = \"absolute\";\n                // this.size is used by overlays which don't get scaled in at\n                // least one direction when this.checkResize is set to false.\n                this.size = $.getElementSize(element);\n            }\n\n            var positionAndSize = this._getOverlayPositionAndSize(viewport);\n\n            var position = positionAndSize.position;\n            var size = this.size = positionAndSize.size;\n            var rotate = positionAndSize.rotate;\n\n            // call the onDraw callback if it exists to allow one to overwrite\n            // the drawing/positioning/sizing of the overlay\n            if (this.onDraw) {\n                this.onDraw(position, size, this.element);\n            } else {\n                var style = this.style;\n                style.left = position.x + \"px\";\n                style.top = position.y + \"px\";\n                if (this.width !== null) {\n                    style.width = size.x + \"px\";\n                }\n                if (this.height !== null) {\n                    style.height = size.y + \"px\";\n                }\n                var transformOriginProp = $.getCssPropertyWithVendorPrefix(\n                    'transformOrigin');\n                var transformProp = $.getCssPropertyWithVendorPrefix(\n                    'transform');\n                if (transformOriginProp && transformProp) {\n                    if (rotate) {\n                        style[transformOriginProp] = this._getTransformOrigin();\n                        style[transformProp] = \"rotate(\" + rotate + \"deg)\";\n                    } else {\n                        style[transformOriginProp] = \"\";\n                        style[transformProp] = \"\";\n                    }\n                }\n                style.display = 'block';\n            }\n        },\n\n        // private\n        _getOverlayPositionAndSize: function(viewport) {\n            var position = viewport.pixelFromPoint(this.location, true);\n            var size = this._getSizeInPixels(viewport);\n            this.adjust(position, size);\n\n            var rotate = 0;\n            if (viewport.degrees &&\n                this.rotationMode !== $.OverlayRotationMode.NO_ROTATION) {\n                // BOUNDING_BOX is only valid if both directions get scaled.\n                // Get replaced by EXACT otherwise.\n                if (this.rotationMode === $.OverlayRotationMode.BOUNDING_BOX &&\n                    this.width !== null && this.height !== null) {\n                    var rect = new $.Rect(position.x, position.y, size.x, size.y);\n                    var boundingBox = this._getBoundingBox(rect, viewport.degrees);\n                    position = boundingBox.getTopLeft();\n                    size = boundingBox.getSize();\n                } else {\n                    rotate = viewport.degrees;\n                }\n            }\n\n            return {\n                position: position,\n                size: size,\n                rotate: rotate\n            };\n        },\n\n        // private\n        _getSizeInPixels: function(viewport) {\n            var width = this.size.x;\n            var height = this.size.y;\n            if (this.width !== null || this.height !== null) {\n                var scaledSize = viewport.deltaPixelsFromPointsNoRotate(\n                    new $.Point(this.width || 0, this.height || 0), true);\n                if (this.width !== null) {\n                    width = scaledSize.x;\n                }\n                if (this.height !== null) {\n                    height = scaledSize.y;\n                }\n            }\n            if (this.checkResize &&\n                (this.width === null || this.height === null)) {\n                var eltSize = this.size = $.getElementSize(this.element);\n                if (this.width === null) {\n                    width = eltSize.x;\n                }\n                if (this.height === null) {\n                    height = eltSize.y;\n                }\n            }\n            return new $.Point(width, height);\n        },\n\n        // private\n        _getBoundingBox: function(rect, degrees) {\n            var refPoint = this._getPlacementPoint(rect);\n            return rect.rotate(degrees, refPoint).getBoundingBox();\n        },\n\n        // private\n        _getPlacementPoint: function(rect) {\n            var result = new $.Point(rect.x, rect.y);\n            var properties = $.Placement.properties[this.placement];\n            if (properties) {\n                if (properties.isHorizontallyCentered) {\n                    result.x += rect.width / 2;\n                } else if (properties.isRight) {\n                    result.x += rect.width;\n                }\n                if (properties.isVerticallyCentered) {\n                    result.y += rect.height / 2;\n                } else if (properties.isBottom) {\n                    result.y += rect.height;\n                }\n            }\n            return result;\n        },\n\n        // private\n        _getTransformOrigin: function() {\n            var result = \"\";\n            var properties = $.Placement.properties[this.placement];\n            if (!properties) {\n                return result;\n            }\n            if (properties.isLeft) {\n                result = \"left\";\n            } else if (properties.isRight) {\n                result = \"right\";\n            }\n            if (properties.isTop) {\n                result += \" top\";\n            } else if (properties.isBottom) {\n                result += \" bottom\";\n            }\n            return result;\n        },\n\n        /**\n         * Changes the overlay settings.\n         * @function\n         * @param {OpenSeadragon.Point|OpenSeadragon.Rect|Object} location\n         * If an object is specified, the options are the same than the constructor\n         * except for the element which can not be changed.\n         * @param {OpenSeadragon.Placement} placement\n         */\n        update: function(location, placement) {\n            var options = $.isPlainObject(location) ? location : {\n                location: location,\n                placement: placement\n            };\n            this._init({\n                location: options.location || this.location,\n                placement: options.placement !== undefined ?\n                    options.placement : this.placement,\n                onDraw: options.onDraw || this.onDraw,\n                checkResize: options.checkResize || this.checkResize,\n                width: options.width !== undefined ? options.width : this.width,\n                height: options.height !== undefined ? options.height : this.height,\n                rotationMode: options.rotationMode || this.rotationMode\n            });\n        },\n\n        /**\n         * Returns the current bounds of the overlay in viewport coordinates\n         * @function\n         * @param {OpenSeadragon.Viewport} viewport the viewport\n         * @returns {OpenSeadragon.Rect} overlay bounds\n         */\n        getBounds: function(viewport) {\n            $.console.assert(viewport,\n                'A viewport must now be passed to Overlay.getBounds.');\n            var width = this.width;\n            var height = this.height;\n            if (width === null || height === null) {\n                var size = viewport.deltaPointsFromPixelsNoRotate(this.size, true);\n                if (width === null) {\n                    width = size.x;\n                }\n                if (height === null) {\n                    height = size.y;\n                }\n            }\n            var location = this.location.clone();\n            this.adjust(location, new $.Point(width, height));\n            return this._adjustBoundsForRotation(\n                viewport, new $.Rect(location.x, location.y, width, height));\n        },\n\n        // private\n        _adjustBoundsForRotation: function(viewport, bounds) {\n            if (!viewport ||\n                viewport.degrees === 0 ||\n                this.rotationMode === $.OverlayRotationMode.EXACT) {\n                return bounds;\n            }\n            if (this.rotationMode === $.OverlayRotationMode.BOUNDING_BOX) {\n                // If overlay not fully scalable, BOUNDING_BOX falls back to EXACT\n                if (this.width === null || this.height === null) {\n                    return bounds;\n                }\n                // It is easier to just compute the position and size and\n                // convert to viewport coordinates.\n                var positionAndSize = this._getOverlayPositionAndSize(viewport);\n                return viewport.viewerElementToViewportRectangle(new $.Rect(\n                    positionAndSize.position.x,\n                    positionAndSize.position.y,\n                    positionAndSize.size.x,\n                    positionAndSize.size.y));\n            }\n\n            // NO_ROTATION case\n            return bounds.rotate(-viewport.degrees,\n                this._getPlacementPoint(bounds));\n        }\n    };\n\n}(OpenSeadragon));\n\n/*\n * OpenSeadragon - Drawer\n *\n * Copyright (C) 2009 CodePlex Foundation\n * Copyright (C) 2010-2013 OpenSeadragon contributors\n *\n * Redistribution and use in source and binary forms, with or without\n * modification, are permitted provided that the following conditions are\n * met:\n *\n * - Redistributions of source code must retain the above copyright notice,\n *   this list of conditions and the following disclaimer.\n *\n * - Redistributions in binary form must reproduce the above copyright\n *   notice, this list of conditions and the following disclaimer in the\n *   documentation and/or other materials provided with the distribution.\n *\n * - Neither the name of CodePlex Foundation nor the names of its\n *   contributors may be used to endorse or promote products derived from\n *   this software without specific prior written permission.\n *\n * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS\n * \"AS IS\" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT\n * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR\n * A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT\n * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,\n * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED\n * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR\n * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF\n * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING\n * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS\n * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.\n */\n\n(function( $ ){\n\n/**\n * @class Drawer\n * @memberof OpenSeadragon\n * @classdesc Handles rendering of tiles for an {@link OpenSeadragon.Viewer}.\n * @param {Object} options - Options for this Drawer.\n * @param {OpenSeadragon.Viewer} options.viewer - The Viewer that owns this Drawer.\n * @param {OpenSeadragon.Viewport} options.viewport - Reference to Viewer viewport.\n * @param {Element} options.element - Parent element.\n * @param {Number} [options.debugGridColor] - See debugGridColor in {@link OpenSeadragon.Options} for details.\n */\n$.Drawer = function( options ) {\n\n    $.console.assert( options.viewer, \"[Drawer] options.viewer is required\" );\n\n    //backward compatibility for positional args while preferring more\n    //idiomatic javascript options object as the only argument\n    var args  = arguments;\n\n    if( !$.isPlainObject( options ) ){\n        options = {\n            source:     args[ 0 ], // Reference to Viewer tile source.\n            viewport:   args[ 1 ], // Reference to Viewer viewport.\n            element:    args[ 2 ]  // Parent element.\n        };\n    }\n\n    $.console.assert( options.viewport, \"[Drawer] options.viewport is required\" );\n    $.console.assert( options.element, \"[Drawer] options.element is required\" );\n\n    if ( options.source ) {\n        $.console.error( \"[Drawer] options.source is no longer accepted; use TiledImage instead\" );\n    }\n\n    this.viewer = options.viewer;\n    this.viewport = options.viewport;\n    this.debugGridColor = typeof options.debugGridColor === 'string' ? [options.debugGridColor] : options.debugGridColor || $.DEFAULT_SETTINGS.debugGridColor;\n    if (options.opacity) {\n        $.console.error( \"[Drawer] options.opacity is no longer accepted; set the opacity on the TiledImage instead\" );\n    }\n\n    this.useCanvas  = $.supportsCanvas && ( this.viewer ? this.viewer.useCanvas : true );\n    /**\n     * The parent element of this Drawer instance, passed in when the Drawer was created.\n     * The parent of {@link OpenSeadragon.Drawer#canvas}.\n     * @member {Element} container\n     * @memberof OpenSeadragon.Drawer#\n     */\n    this.container  = $.getElement( options.element );\n    /**\n     * A &lt;canvas&gt; element if the browser supports them, otherwise a &lt;div&gt; element.\n     * Child element of {@link OpenSeadragon.Drawer#container}.\n     * @member {Element} canvas\n     * @memberof OpenSeadragon.Drawer#\n     */\n    this.canvas     = $.makeNeutralElement( this.useCanvas ? \"canvas\" : \"div\" );\n    /**\n     * 2d drawing context for {@link OpenSeadragon.Drawer#canvas} if it's a &lt;canvas&gt; element, otherwise null.\n     * @member {Object} context\n     * @memberof OpenSeadragon.Drawer#\n     */\n    this.context    = this.useCanvas ? this.canvas.getContext( \"2d\" ) : null;\n\n    /**\n     * Sketch canvas used to temporarily draw tiles which cannot be drawn directly\n     * to the main canvas due to opacity. Lazily initialized.\n     */\n    this.sketchCanvas = null;\n    this.sketchContext = null;\n\n    /**\n     * @member {Element} element\n     * @memberof OpenSeadragon.Drawer#\n     * @deprecated Alias for {@link OpenSeadragon.Drawer#container}.\n     */\n    this.element    = this.container;\n\n    // We force our container to ltr because our drawing math doesn't work in rtl.\n    // This issue only affects our canvas renderer, but we do it always for consistency.\n    // Note that this means overlays you want to be rtl need to be explicitly set to rtl.\n    this.container.dir = 'ltr';\n\n    // check canvas available width and height, set canvas width and height such that the canvas backing store is set to the proper pixel density\n    if (this.useCanvas) {\n        var viewportSize = this._calculateCanvasSize();\n        this.canvas.width = viewportSize.x;\n        this.canvas.height = viewportSize.y;\n    }\n\n    this.canvas.style.width     = \"100%\";\n    this.canvas.style.height    = \"100%\";\n    this.canvas.style.position  = \"absolute\";\n    $.setElementOpacity( this.canvas, this.opacity, true );\n    // Allow pointer events to pass through the canvas element so implicit\n    //   pointer capture works on touch devices\n    $.setElementPointerEventsNone( this.canvas );\n    $.setElementTouchActionNone( this.canvas );\n\n    // explicit left-align\n    this.container.style.textAlign = \"left\";\n    this.container.appendChild( this.canvas );\n\n    // Image smoothing for canvas rendering (only if canvas is used).\n    // Canvas default is \"true\", so this will only be changed if user specified \"false\".\n    this._imageSmoothingEnabled = true;\n};\n\n/** @lends OpenSeadragon.Drawer.prototype */\n$.Drawer.prototype = {\n    // deprecated\n    addOverlay: function( element, location, placement, onDraw ) {\n        $.console.error(\"drawer.addOverlay is deprecated. Use viewer.addOverlay instead.\");\n        this.viewer.addOverlay( element, location, placement, onDraw );\n        return this;\n    },\n\n    // deprecated\n    updateOverlay: function( element, location, placement ) {\n        $.console.error(\"drawer.updateOverlay is deprecated. Use viewer.updateOverlay instead.\");\n        this.viewer.updateOverlay( element, location, placement );\n        return this;\n    },\n\n    // deprecated\n    removeOverlay: function( element ) {\n        $.console.error(\"drawer.removeOverlay is deprecated. Use viewer.removeOverlay instead.\");\n        this.viewer.removeOverlay( element );\n        return this;\n    },\n\n    // deprecated\n    clearOverlays: function() {\n        $.console.error(\"drawer.clearOverlays is deprecated. Use viewer.clearOverlays instead.\");\n        this.viewer.clearOverlays();\n        return this;\n    },\n\n    /**\n     * This function converts the given point from to the drawer coordinate by\n     * multiplying it with the pixel density.\n     * This function does not take rotation into account, thus assuming provided\n     * point is at 0 degree.\n     * @param {OpenSeadragon.Point} point - the pixel point to convert\n     */\n    viewportCoordToDrawerCoord: function(point) {\n        var vpPoint = this.viewport.pixelFromPointNoRotate(point, true);\n        return new $.Point(\n            vpPoint.x * $.pixelDensityRatio,\n            vpPoint.y * $.pixelDensityRatio\n        );\n    },\n\n    /**\n     * This function will create multiple polygon paths on the drawing context by provided polygons,\n     * then clip the context to the paths.\n     * @param {OpenSeadragon.Point[][]} polygons - an array of polygons. A polygon is an array of OpenSeadragon.Point\n     * @param {Boolean} useSketch - Whether to use the sketch canvas or not.\n     */\n    clipWithPolygons: function (polygons, useSketch) {\n        if (!this.useCanvas) {\n            return;\n        }\n        var context = this._getContext(useSketch);\n        context.beginPath();\n        polygons.forEach(function (polygon) {\n            polygon.forEach(function (coord, i) {\n                context[i === 0 ? 'moveTo' : 'lineTo'](coord.x, coord.y);\n          });\n        });\n        context.clip();\n    },\n\n    /**\n     * Set the opacity of the drawer.\n     * @param {Number} opacity\n     * @return {OpenSeadragon.Drawer} Chainable.\n     */\n    setOpacity: function( opacity ) {\n        $.console.error(\"drawer.setOpacity is deprecated. Use tiledImage.setOpacity instead.\");\n        var world = this.viewer.world;\n        for (var i = 0; i < world.getItemCount(); i++) {\n            world.getItemAt( i ).setOpacity( opacity );\n        }\n        return this;\n    },\n\n    /**\n     * Get the opacity of the drawer.\n     * @returns {Number}\n     */\n    getOpacity: function() {\n        $.console.error(\"drawer.getOpacity is deprecated. Use tiledImage.getOpacity instead.\");\n        var world = this.viewer.world;\n        var maxOpacity = 0;\n        for (var i = 0; i < world.getItemCount(); i++) {\n            var opacity = world.getItemAt( i ).getOpacity();\n            if ( opacity > maxOpacity ) {\n                maxOpacity = opacity;\n            }\n        }\n        return maxOpacity;\n    },\n\n    // deprecated\n    needsUpdate: function() {\n        $.console.error( \"[Drawer.needsUpdate] this function is deprecated. Use World.needsDraw instead.\" );\n        return this.viewer.world.needsDraw();\n    },\n\n    // deprecated\n    numTilesLoaded: function() {\n        $.console.error( \"[Drawer.numTilesLoaded] this function is deprecated. Use TileCache.numTilesLoaded instead.\" );\n        return this.viewer.tileCache.numTilesLoaded();\n    },\n\n    // deprecated\n    reset: function() {\n        $.console.error( \"[Drawer.reset] this function is deprecated. Use World.resetItems instead.\" );\n        this.viewer.world.resetItems();\n        return this;\n    },\n\n    // deprecated\n    update: function() {\n        $.console.error( \"[Drawer.update] this function is deprecated. Use Drawer.clear and World.draw instead.\" );\n        this.clear();\n        this.viewer.world.draw();\n        return this;\n    },\n\n    /**\n     * @return {Boolean} True if rotation is supported.\n     */\n    canRotate: function() {\n        return this.useCanvas;\n    },\n\n    /**\n     * Destroy the drawer (unload current loaded tiles)\n     */\n    destroy: function() {\n        //force unloading of current canvas (1x1 will be gc later, trick not necessarily needed)\n        this.canvas.width  = 1;\n        this.canvas.height = 1;\n        this.sketchCanvas = null;\n        this.sketchContext = null;\n    },\n\n    /**\n     * Clears the Drawer so it's ready to draw another frame.\n     */\n    clear: function() {\n        this.canvas.innerHTML = \"\";\n        if ( this.useCanvas ) {\n            var viewportSize = this._calculateCanvasSize();\n            if( this.canvas.width !== viewportSize.x ||\n                this.canvas.height !== viewportSize.y ) {\n                this.canvas.width = viewportSize.x;\n                this.canvas.height = viewportSize.y;\n                this._updateImageSmoothingEnabled(this.context);\n                if ( this.sketchCanvas !== null ) {\n                    var sketchCanvasSize = this._calculateSketchCanvasSize();\n                    this.sketchCanvas.width = sketchCanvasSize.x;\n                    this.sketchCanvas.height = sketchCanvasSize.y;\n                    this._updateImageSmoothingEnabled(this.sketchContext);\n                }\n            }\n            this._clear();\n        }\n    },\n\n    _clear: function (useSketch, bounds) {\n        if (!this.useCanvas) {\n            return;\n        }\n        var context = this._getContext(useSketch);\n        if (bounds) {\n            context.clearRect(bounds.x, bounds.y, bounds.width, bounds.height);\n        } else {\n            var canvas = context.canvas;\n            context.clearRect(0, 0, canvas.width, canvas.height);\n        }\n    },\n\n    /**\n     * Scale from OpenSeadragon viewer rectangle to drawer rectangle\n     * (ignoring rotation)\n     * @param {OpenSeadragon.Rect} rectangle - The rectangle in viewport coordinate system.\n     * @return {OpenSeadragon.Rect} Rectangle in drawer coordinate system.\n     */\n    viewportToDrawerRectangle: function(rectangle) {\n        var topLeft = this.viewport.pixelFromPointNoRotate(rectangle.getTopLeft(), true);\n        var size = this.viewport.deltaPixelsFromPointsNoRotate(rectangle.getSize(), true);\n\n        return new $.Rect(\n            topLeft.x * $.pixelDensityRatio,\n            topLeft.y * $.pixelDensityRatio,\n            size.x * $.pixelDensityRatio,\n            size.y * $.pixelDensityRatio\n        );\n    },\n\n    /**\n     * Draws the given tile.\n     * @param {OpenSeadragon.Tile} tile - The tile to draw.\n     * @param {Function} drawingHandler - Method for firing the drawing event if using canvas.\n     * drawingHandler({context, tile, rendered})\n     * @param {Boolean} useSketch - Whether to use the sketch canvas or not.\n     * where <code>rendered</code> is the context with the pre-drawn image.\n     * @param {Float} [scale=1] - Apply a scale to tile position and size. Defaults to 1.\n     * @param {OpenSeadragon.Point} [translate] A translation vector to offset tile position\n     * @param {Boolean} [shouldRoundPositionAndSize] - Tells whether to round\n     * position and size of tiles supporting alpha channel in non-transparency\n     * context.\n     */\n    drawTile: function(tile, drawingHandler, useSketch, scale, translate, shouldRoundPositionAndSize) {\n        $.console.assert(tile, '[Drawer.drawTile] tile is required');\n        $.console.assert(drawingHandler, '[Drawer.drawTile] drawingHandler is required');\n\n        if (this.useCanvas) {\n            var context = this._getContext(useSketch);\n            scale = scale || 1;\n            tile.drawCanvas(context, drawingHandler, scale, translate, shouldRoundPositionAndSize);\n        } else {\n            tile.drawHTML( this.canvas );\n        }\n    },\n\n    _getContext: function( useSketch ) {\n        var context = this.context;\n        if ( useSketch ) {\n            if (this.sketchCanvas === null) {\n                this.sketchCanvas = document.createElement( \"canvas\" );\n                var sketchCanvasSize = this._calculateSketchCanvasSize();\n                this.sketchCanvas.width = sketchCanvasSize.x;\n                this.sketchCanvas.height = sketchCanvasSize.y;\n                this.sketchContext = this.sketchCanvas.getContext( \"2d\" );\n\n                // If the viewport is not currently rotated, the sketchCanvas\n                // will have the same size as the main canvas. However, if\n                // the viewport get rotated later on, we will need to resize it.\n                if (this.viewport.getRotation() === 0) {\n                    var self = this;\n                    this.viewer.addHandler('rotate', function resizeSketchCanvas() {\n                        if (self.viewport.getRotation() === 0) {\n                            return;\n                        }\n                        self.viewer.removeHandler('rotate', resizeSketchCanvas);\n                        var sketchCanvasSize = self._calculateSketchCanvasSize();\n                        self.sketchCanvas.width = sketchCanvasSize.x;\n                        self.sketchCanvas.height = sketchCanvasSize.y;\n                    });\n                }\n                this._updateImageSmoothingEnabled(this.sketchContext);\n            }\n            context = this.sketchContext;\n        }\n        return context;\n    },\n\n    // private\n    saveContext: function( useSketch ) {\n        if (!this.useCanvas) {\n            return;\n        }\n\n        this._getContext( useSketch ).save();\n    },\n\n    // private\n    restoreContext: function( useSketch ) {\n        if (!this.useCanvas) {\n            return;\n        }\n\n        this._getContext( useSketch ).restore();\n    },\n\n    // private\n    setClip: function(rect, useSketch) {\n        if (!this.useCanvas) {\n            return;\n        }\n\n        var context = this._getContext( useSketch );\n        context.beginPath();\n        context.rect(rect.x, rect.y, rect.width, rect.height);\n        context.clip();\n    },\n\n    // private\n    drawRectangle: function(rect, fillStyle, useSketch) {\n        if (!this.useCanvas) {\n            return;\n        }\n\n        var context = this._getContext( useSketch );\n        context.save();\n        context.fillStyle = fillStyle;\n        context.fillRect(rect.x, rect.y, rect.width, rect.height);\n        context.restore();\n    },\n\n    /**\n     * Blends the sketch canvas in the main canvas.\n     * @param {Object} options The options\n     * @param {Float} options.opacity The opacity of the blending.\n     * @param {Float} [options.scale=1] The scale at which tiles were drawn on\n     * the sketch. Default is 1.\n     * Use scale to draw at a lower scale and then enlarge onto the main canvas.\n     * @param {OpenSeadragon.Point} [options.translate] A translation vector\n     * that was used to draw the tiles\n     * @param {String} [options.compositeOperation] - How the image is\n     * composited onto other images; see compositeOperation in\n     * {@link OpenSeadragon.Options} for possible values.\n     * @param {OpenSeadragon.Rect} [options.bounds] The part of the sketch\n     * canvas to blend in the main canvas. If specified, options.scale and\n     * options.translate get ignored.\n     */\n    blendSketch: function(opacity, scale, translate, compositeOperation) {\n        var options = opacity;\n        if (!$.isPlainObject(options)) {\n            options = {\n                opacity: opacity,\n                scale: scale,\n                translate: translate,\n                compositeOperation: compositeOperation\n            };\n        }\n        if (!this.useCanvas || !this.sketchCanvas) {\n            return;\n        }\n        opacity = options.opacity;\n        compositeOperation = options.compositeOperation;\n        var bounds = options.bounds;\n\n        this.context.save();\n        this.context.globalAlpha = opacity;\n        if (compositeOperation) {\n            this.context.globalCompositeOperation = compositeOperation;\n        }\n        if (bounds) {\n            // Internet Explorer, Microsoft Edge, and Safari have problems\n            // when you call context.drawImage with negative x or y\n            // or x + width or y + height greater than the canvas width or height respectively.\n            if (bounds.x < 0) {\n                bounds.width += bounds.x;\n                bounds.x = 0;\n            }\n            if (bounds.x + bounds.width > this.canvas.width) {\n                bounds.width = this.canvas.width - bounds.x;\n            }\n            if (bounds.y < 0) {\n                bounds.height += bounds.y;\n                bounds.y = 0;\n            }\n            if (bounds.y + bounds.height > this.canvas.height) {\n                bounds.height = this.canvas.height - bounds.y;\n            }\n\n            this.context.drawImage(\n                this.sketchCanvas,\n                bounds.x,\n                bounds.y,\n                bounds.width,\n                bounds.height,\n                bounds.x,\n                bounds.y,\n                bounds.width,\n                bounds.height\n            );\n        } else {\n            scale = options.scale || 1;\n            translate = options.translate;\n            var position = translate instanceof $.Point ?\n                translate : new $.Point(0, 0);\n\n            var widthExt = 0;\n            var heightExt = 0;\n            if (translate) {\n                var widthDiff = this.sketchCanvas.width - this.canvas.width;\n                var heightDiff = this.sketchCanvas.height - this.canvas.height;\n                widthExt = Math.round(widthDiff / 2);\n                heightExt = Math.round(heightDiff / 2);\n            }\n            this.context.drawImage(\n                this.sketchCanvas,\n                position.x - widthExt * scale,\n                position.y - heightExt * scale,\n                (this.canvas.width + 2 * widthExt) * scale,\n                (this.canvas.height + 2 * heightExt) * scale,\n                -widthExt,\n                -heightExt,\n                this.canvas.width + 2 * widthExt,\n                this.canvas.height + 2 * heightExt\n            );\n        }\n        this.context.restore();\n    },\n\n    // private\n    drawDebugInfo: function(tile, count, i, tiledImage) {\n        if ( !this.useCanvas ) {\n            return;\n        }\n\n        var colorIndex = this.viewer.world.getIndexOfItem(tiledImage) % this.debugGridColor.length;\n        var context = this.context;\n        context.save();\n        context.lineWidth = 2 * $.pixelDensityRatio;\n        context.font = 'small-caps bold ' + (13 * $.pixelDensityRatio) + 'px arial';\n        context.strokeStyle = this.debugGridColor[colorIndex];\n        context.fillStyle = this.debugGridColor[colorIndex];\n\n        if ( this.viewport.degrees !== 0 ) {\n            this._offsetForRotation({degrees: this.viewport.degrees});\n        }\n        if (tiledImage.getRotation(true) % 360 !== 0) {\n            this._offsetForRotation({\n                degrees: tiledImage.getRotation(true),\n                point: tiledImage.viewport.pixelFromPointNoRotate(\n                    tiledImage._getRotationPoint(true), true)\n            });\n        }\n        if (tiledImage.viewport.degrees === 0 && tiledImage.getRotation(true) % 360 === 0){\n          if(tiledImage._drawer.viewer.viewport.getFlip()) {\n              tiledImage._drawer._flip();\n          }\n        }\n\n        context.strokeRect(\n            tile.position.x * $.pixelDensityRatio,\n            tile.position.y * $.pixelDensityRatio,\n            tile.size.x * $.pixelDensityRatio,\n            tile.size.y * $.pixelDensityRatio\n        );\n\n        var tileCenterX = (tile.position.x + (tile.size.x / 2)) * $.pixelDensityRatio;\n        var tileCenterY = (tile.position.y + (tile.size.y / 2)) * $.pixelDensityRatio;\n\n        // Rotate the text the right way around.\n        context.translate( tileCenterX, tileCenterY );\n        context.rotate( Math.PI / 180 * -this.viewport.degrees );\n        context.translate( -tileCenterX, -tileCenterY );\n\n        if( tile.x === 0 && tile.y === 0 ){\n            context.fillText(\n                \"Zoom: \" + this.viewport.getZoom(),\n                tile.position.x * $.pixelDensityRatio,\n                (tile.position.y - 30) * $.pixelDensityRatio\n            );\n            context.fillText(\n                \"Pan: \" + this.viewport.getBounds().toString(),\n                tile.position.x * $.pixelDensityRatio,\n                (tile.position.y - 20) * $.pixelDensityRatio\n            );\n        }\n        context.fillText(\n            \"Level: \" + tile.level,\n            (tile.position.x + 10) * $.pixelDensityRatio,\n            (tile.position.y + 20) * $.pixelDensityRatio\n        );\n        context.fillText(\n            \"Column: \" + tile.x,\n            (tile.position.x + 10) * $.pixelDensityRatio,\n            (tile.position.y + 30) * $.pixelDensityRatio\n        );\n        context.fillText(\n            \"Row: \" + tile.y,\n            (tile.position.x + 10) * $.pixelDensityRatio,\n            (tile.position.y + 40) * $.pixelDensityRatio\n        );\n        context.fillText(\n            \"Order: \" + i + \" of \" + count,\n            (tile.position.x + 10) * $.pixelDensityRatio,\n            (tile.position.y + 50) * $.pixelDensityRatio\n        );\n        context.fillText(\n            \"Size: \" + tile.size.toString(),\n            (tile.position.x + 10) * $.pixelDensityRatio,\n            (tile.position.y + 60) * $.pixelDensityRatio\n        );\n        context.fillText(\n            \"Position: \" + tile.position.toString(),\n            (tile.position.x + 10) * $.pixelDensityRatio,\n            (tile.position.y + 70) * $.pixelDensityRatio\n        );\n\n        if ( this.viewport.degrees !== 0 ) {\n            this._restoreRotationChanges();\n        }\n        if (tiledImage.getRotation(true) % 360 !== 0) {\n            this._restoreRotationChanges();\n        }\n\n        if (tiledImage.viewport.degrees === 0 && tiledImage.getRotation(true) % 360 === 0){\n          if(tiledImage._drawer.viewer.viewport.getFlip()) {\n              tiledImage._drawer._flip();\n          }\n        }\n\n        context.restore();\n    },\n\n    // private\n    debugRect: function(rect) {\n        if ( this.useCanvas ) {\n            var context = this.context;\n            context.save();\n            context.lineWidth = 2 * $.pixelDensityRatio;\n            context.strokeStyle = this.debugGridColor[0];\n            context.fillStyle = this.debugGridColor[0];\n\n            context.strokeRect(\n                rect.x * $.pixelDensityRatio,\n                rect.y * $.pixelDensityRatio,\n                rect.width * $.pixelDensityRatio,\n                rect.height * $.pixelDensityRatio\n            );\n\n            context.restore();\n        }\n    },\n\n    /**\n     * Turns image smoothing on or off for this viewer. Note: Ignored in some (especially older) browsers that do not support this property.\n     *\n     * @function\n     * @param {Boolean} [imageSmoothingEnabled] - Whether or not the image is\n     * drawn smoothly on the canvas; see imageSmoothingEnabled in\n     * {@link OpenSeadragon.Options} for more explanation.\n     */\n    setImageSmoothingEnabled: function(imageSmoothingEnabled){\n        if ( this.useCanvas ) {\n            this._imageSmoothingEnabled = imageSmoothingEnabled;\n            this._updateImageSmoothingEnabled(this.context);\n            this.viewer.forceRedraw();\n        }\n    },\n\n    // private\n    _updateImageSmoothingEnabled: function(context){\n        context.msImageSmoothingEnabled = this._imageSmoothingEnabled;\n        context.imageSmoothingEnabled = this._imageSmoothingEnabled;\n    },\n\n    /**\n     * Get the canvas size\n     * @param {Boolean} sketch If set to true return the size of the sketch canvas\n     * @returns {OpenSeadragon.Point} The size of the canvas\n     */\n    getCanvasSize: function(sketch) {\n        var canvas = this._getContext(sketch).canvas;\n        return new $.Point(canvas.width, canvas.height);\n    },\n\n    getCanvasCenter: function() {\n        return new $.Point(this.canvas.width / 2, this.canvas.height / 2);\n    },\n\n    // private\n    _offsetForRotation: function(options) {\n        var point = options.point ?\n            options.point.times($.pixelDensityRatio) :\n            this.getCanvasCenter();\n\n        var context = this._getContext(options.useSketch);\n        context.save();\n\n        context.translate(point.x, point.y);\n        if(this.viewer.viewport.flipped){\n          context.rotate(Math.PI / 180 * -options.degrees);\n          context.scale(-1, 1);\n        } else{\n          context.rotate(Math.PI / 180 * options.degrees);\n        }\n        context.translate(-point.x, -point.y);\n    },\n\n    // private\n    _flip: function(options) {\n      options = options || {};\n      var point = options.point ?\n        options.point.times($.pixelDensityRatio) :\n        this.getCanvasCenter();\n      var context = this._getContext(options.useSketch);\n\n      context.translate(point.x, 0);\n      context.scale(-1, 1);\n      context.translate(-point.x, 0);\n    },\n\n    // private\n    _restoreRotationChanges: function(useSketch) {\n        var context = this._getContext(useSketch);\n        context.restore();\n    },\n\n    // private\n    _calculateCanvasSize: function() {\n        var pixelDensityRatio = $.pixelDensityRatio;\n        var viewportSize = this.viewport.getContainerSize();\n        return {\n            // canvas width and height are integers\n            x: Math.round(viewportSize.x * pixelDensityRatio),\n            y: Math.round(viewportSize.y * pixelDensityRatio)\n        };\n    },\n\n    // private\n    _calculateSketchCanvasSize: function() {\n        var canvasSize = this._calculateCanvasSize();\n        if (this.viewport.getRotation() === 0) {\n            return canvasSize;\n        }\n        // If the viewport is rotated, we need a larger sketch canvas in order\n        // to support edge smoothing.\n        var sketchCanvasSize = Math.ceil(Math.sqrt(\n            canvasSize.x * canvasSize.x +\n            canvasSize.y * canvasSize.y));\n        return {\n            x: sketchCanvasSize,\n            y: sketchCanvasSize\n        };\n    }\n};\n\n}( OpenSeadragon ));\n\n/*\n * OpenSeadragon - Viewport\n *\n * Copyright (C) 2009 CodePlex Foundation\n * Copyright (C) 2010-2013 OpenSeadragon contributors\n *\n * Redistribution and use in source and binary forms, with or without\n * modification, are permitted provided that the following conditions are\n * met:\n *\n * - Redistributions of source code must retain the above copyright notice,\n *   this list of conditions and the following disclaimer.\n *\n * - Redistributions in binary form must reproduce the above copyright\n *   notice, this list of conditions and the following disclaimer in the\n *   documentation and/or other materials provided with the distribution.\n *\n * - Neither the name of CodePlex Foundation nor the names of its\n *   contributors may be used to endorse or promote products derived from\n *   this software without specific prior written permission.\n *\n * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS\n * \"AS IS\" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT\n * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR\n * A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT\n * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,\n * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED\n * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR\n * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF\n * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING\n * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS\n * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.\n */\n\n(function( $ ){\n\n\n/**\n * @class Viewport\n * @memberof OpenSeadragon\n * @classdesc Handles coordinate-related functionality (zoom, pan, rotation, etc.)\n * for an {@link OpenSeadragon.Viewer}.\n * @param {Object} options - Options for this Viewport.\n * @param {Object} [options.margins] - See viewportMargins in {@link OpenSeadragon.Options}.\n * @param {Number} [options.springStiffness] - See springStiffness in {@link OpenSeadragon.Options}.\n * @param {Number} [options.animationTime] - See animationTime in {@link OpenSeadragon.Options}.\n * @param {Number} [options.minZoomImageRatio] - See minZoomImageRatio in {@link OpenSeadragon.Options}.\n * @param {Number} [options.maxZoomPixelRatio] - See maxZoomPixelRatio in {@link OpenSeadragon.Options}.\n * @param {Number} [options.visibilityRatio] - See visibilityRatio in {@link OpenSeadragon.Options}.\n * @param {Boolean} [options.wrapHorizontal] - See wrapHorizontal in {@link OpenSeadragon.Options}.\n * @param {Boolean} [options.wrapVertical] - See wrapVertical in {@link OpenSeadragon.Options}.\n * @param {Number} [options.defaultZoomLevel] - See defaultZoomLevel in {@link OpenSeadragon.Options}.\n * @param {Number} [options.minZoomLevel] - See minZoomLevel in {@link OpenSeadragon.Options}.\n * @param {Number} [options.maxZoomLevel] - See maxZoomLevel in {@link OpenSeadragon.Options}.\n * @param {Number} [options.degrees] - See degrees in {@link OpenSeadragon.Options}.\n * @param {Boolean} [options.homeFillsViewer] - See homeFillsViewer in {@link OpenSeadragon.Options}.\n * @param {Boolean} [options.silenceMultiImageWarnings] - See silenceMultiImageWarnings in {@link OpenSeadragon.Options}.\n */\n$.Viewport = function( options ) {\n\n    //backward compatibility for positional args while preferring more\n    //idiomatic javascript options object as the only argument\n    var args = arguments;\n    if (args.length && args[0] instanceof $.Point) {\n        options = {\n            containerSize:  args[0],\n            contentSize:    args[1],\n            config:         args[2]\n        };\n    }\n\n    //options.config and the general config argument are deprecated\n    //in favor of the more direct specification of optional settings\n    //being passed directly on the options object\n    if ( options.config ){\n        $.extend( true, options, options.config );\n        delete options.config;\n    }\n\n    this._margins = $.extend({\n        left: 0,\n        top: 0,\n        right: 0,\n        bottom: 0\n    }, options.margins || {});\n\n    delete options.margins;\n\n    $.extend( true, this, {\n\n        //required settings\n        containerSize:      null,\n        contentSize:        null,\n\n        //internal state properties\n        zoomPoint:          null,\n        viewer:           null,\n\n        //configurable options\n        springStiffness:            $.DEFAULT_SETTINGS.springStiffness,\n        animationTime:              $.DEFAULT_SETTINGS.animationTime,\n        minZoomImageRatio:          $.DEFAULT_SETTINGS.minZoomImageRatio,\n        maxZoomPixelRatio:          $.DEFAULT_SETTINGS.maxZoomPixelRatio,\n        visibilityRatio:            $.DEFAULT_SETTINGS.visibilityRatio,\n        wrapHorizontal:             $.DEFAULT_SETTINGS.wrapHorizontal,\n        wrapVertical:               $.DEFAULT_SETTINGS.wrapVertical,\n        defaultZoomLevel:           $.DEFAULT_SETTINGS.defaultZoomLevel,\n        minZoomLevel:               $.DEFAULT_SETTINGS.minZoomLevel,\n        maxZoomLevel:               $.DEFAULT_SETTINGS.maxZoomLevel,\n        degrees:                    $.DEFAULT_SETTINGS.degrees,\n        flipped:                    $.DEFAULT_SETTINGS.flipped,\n        homeFillsViewer:            $.DEFAULT_SETTINGS.homeFillsViewer,\n        silenceMultiImageWarnings:  $.DEFAULT_SETTINGS.silenceMultiImageWarnings\n\n    }, options );\n\n    this._updateContainerInnerSize();\n\n    this.centerSpringX = new $.Spring({\n        initial: 0,\n        springStiffness: this.springStiffness,\n        animationTime:   this.animationTime\n    });\n    this.centerSpringY = new $.Spring({\n        initial: 0,\n        springStiffness: this.springStiffness,\n        animationTime:   this.animationTime\n    });\n    this.zoomSpring    = new $.Spring({\n        exponential: true,\n        initial: 1,\n        springStiffness: this.springStiffness,\n        animationTime:   this.animationTime\n    });\n\n    this._oldCenterX = this.centerSpringX.current.value;\n    this._oldCenterY = this.centerSpringY.current.value;\n    this._oldZoom    = this.zoomSpring.current.value;\n\n    this._setContentBounds(new $.Rect(0, 0, 1, 1), 1);\n\n    this.goHome(true);\n    this.update();\n};\n\n/** @lends OpenSeadragon.Viewport.prototype */\n$.Viewport.prototype = {\n    /**\n     * Updates the viewport's home bounds and constraints for the given content size.\n     * @function\n     * @param {OpenSeadragon.Point} contentSize - size of the content in content units\n     * @return {OpenSeadragon.Viewport} Chainable.\n     * @fires OpenSeadragon.Viewer.event:reset-size\n     */\n    resetContentSize: function(contentSize) {\n        $.console.assert(contentSize, \"[Viewport.resetContentSize] contentSize is required\");\n        $.console.assert(contentSize instanceof $.Point, \"[Viewport.resetContentSize] contentSize must be an OpenSeadragon.Point\");\n        $.console.assert(contentSize.x > 0, \"[Viewport.resetContentSize] contentSize.x must be greater than 0\");\n        $.console.assert(contentSize.y > 0, \"[Viewport.resetContentSize] contentSize.y must be greater than 0\");\n\n        this._setContentBounds(new $.Rect(0, 0, 1, contentSize.y / contentSize.x), contentSize.x);\n        return this;\n    },\n\n    // deprecated\n    setHomeBounds: function(bounds, contentFactor) {\n        $.console.error(\"[Viewport.setHomeBounds] this function is deprecated; The content bounds should not be set manually.\");\n        this._setContentBounds(bounds, contentFactor);\n    },\n\n    // Set the viewport's content bounds\n    // @param {OpenSeadragon.Rect} bounds - the new bounds in viewport coordinates\n    // without rotation\n    // @param {Number} contentFactor - how many content units per viewport unit\n    // @fires OpenSeadragon.Viewer.event:reset-size\n    // @private\n    _setContentBounds: function(bounds, contentFactor) {\n        $.console.assert(bounds, \"[Viewport._setContentBounds] bounds is required\");\n        $.console.assert(bounds instanceof $.Rect, \"[Viewport._setContentBounds] bounds must be an OpenSeadragon.Rect\");\n        $.console.assert(bounds.width > 0, \"[Viewport._setContentBounds] bounds.width must be greater than 0\");\n        $.console.assert(bounds.height > 0, \"[Viewport._setContentBounds] bounds.height must be greater than 0\");\n\n        this._contentBoundsNoRotate = bounds.clone();\n        this._contentSizeNoRotate = this._contentBoundsNoRotate.getSize().times(\n            contentFactor);\n\n        this._contentBounds = bounds.rotate(this.degrees).getBoundingBox();\n        this._contentSize = this._contentBounds.getSize().times(contentFactor);\n        this._contentAspectRatio = this._contentSize.x / this._contentSize.y;\n\n        if (this.viewer) {\n            /**\n             * Raised when the viewer's content size or home bounds are reset\n             * (see {@link OpenSeadragon.Viewport#resetContentSize}).\n             *\n             * @event reset-size\n             * @memberof OpenSeadragon.Viewer\n             * @type {object}\n             * @property {OpenSeadragon.Viewer} eventSource - A reference to the Viewer which raised this event.\n             * @property {OpenSeadragon.Point} contentSize\n             * @property {OpenSeadragon.Rect} contentBounds - Content bounds.\n             * @property {OpenSeadragon.Rect} homeBounds - Content bounds.\n             * Deprecated use contentBounds instead.\n             * @property {Number} contentFactor\n             * @property {?Object} userData - Arbitrary subscriber-defined object.\n             */\n            this.viewer.raiseEvent('reset-size', {\n                contentSize: this._contentSizeNoRotate.clone(),\n                contentFactor: contentFactor,\n                homeBounds: this._contentBoundsNoRotate.clone(),\n                contentBounds: this._contentBounds.clone()\n            });\n        }\n    },\n\n    /**\n     * Returns the home zoom in \"viewport zoom\" value.\n     * @function\n     * @returns {Number} The home zoom in \"viewport zoom\".\n     */\n    getHomeZoom: function() {\n        if (this.defaultZoomLevel) {\n            return this.defaultZoomLevel;\n        }\n\n        var aspectFactor = this._contentAspectRatio / this.getAspectRatio();\n        var output;\n        if (this.homeFillsViewer) { // fill the viewer and clip the image\n            output = aspectFactor >= 1 ? aspectFactor : 1;\n        } else {\n            output = aspectFactor >= 1 ? 1 : aspectFactor;\n        }\n\n        return output / this._contentBounds.width;\n    },\n\n    /**\n     * Returns the home bounds in viewport coordinates.\n     * @function\n     * @returns {OpenSeadragon.Rect} The home bounds in vewport coordinates.\n     */\n    getHomeBounds: function() {\n        return this.getHomeBoundsNoRotate().rotate(-this.getRotation());\n    },\n\n    /**\n     * Returns the home bounds in viewport coordinates.\n     * This method ignores the viewport rotation. Use\n     * {@link OpenSeadragon.Viewport#getHomeBounds} to take it into account.\n     * @function\n     * @returns {OpenSeadragon.Rect} The home bounds in vewport coordinates.\n     */\n    getHomeBoundsNoRotate: function() {\n        var center = this._contentBounds.getCenter();\n        var width  = 1.0 / this.getHomeZoom();\n        var height = width / this.getAspectRatio();\n\n        return new $.Rect(\n            center.x - (width / 2.0),\n            center.y - (height / 2.0),\n            width,\n            height\n        );\n    },\n\n    /**\n     * @function\n     * @param {Boolean} immediately\n     * @fires OpenSeadragon.Viewer.event:home\n     */\n    goHome: function(immediately) {\n        if (this.viewer) {\n            /**\n             * Raised when the \"home\" operation occurs (see {@link OpenSeadragon.Viewport#goHome}).\n             *\n             * @event home\n             * @memberof OpenSeadragon.Viewer\n             * @type {object}\n             * @property {OpenSeadragon.Viewer} eventSource - A reference to the Viewer which raised this event.\n             * @property {Boolean} immediately\n             * @property {?Object} userData - Arbitrary subscriber-defined object.\n             */\n            this.viewer.raiseEvent('home', {\n                immediately: immediately\n            });\n        }\n        return this.fitBounds(this.getHomeBounds(), immediately);\n    },\n\n    /**\n     * @function\n     */\n    getMinZoom: function() {\n        var homeZoom = this.getHomeZoom(),\n            zoom = this.minZoomLevel ?\n            this.minZoomLevel :\n                this.minZoomImageRatio * homeZoom;\n\n        return zoom;\n    },\n\n    /**\n     * @function\n     */\n    getMaxZoom: function() {\n        var zoom = this.maxZoomLevel;\n        if (!zoom) {\n            zoom = this._contentSize.x * this.maxZoomPixelRatio / this._containerInnerSize.x;\n            zoom /= this._contentBounds.width;\n        }\n\n        return Math.max( zoom, this.getHomeZoom() );\n    },\n\n    /**\n     * @function\n     */\n    getAspectRatio: function() {\n        return this._containerInnerSize.x / this._containerInnerSize.y;\n    },\n\n    /**\n     * @function\n     * @returns {OpenSeadragon.Point} The size of the container, in screen coordinates.\n     */\n    getContainerSize: function() {\n        return new $.Point(\n            this.containerSize.x,\n            this.containerSize.y\n        );\n    },\n\n    /**\n     * The margins push the \"home\" region in from the sides by the specified amounts.\n     * @function\n     * @returns {Object} Properties (Numbers, in screen coordinates): left, top, right, bottom.\n     */\n    getMargins: function() {\n        return $.extend({}, this._margins); // Make a copy so we are not returning our original\n    },\n\n    /**\n     * The margins push the \"home\" region in from the sides by the specified amounts.\n     * @function\n     * @param {Object} margins - Properties (Numbers, in screen coordinates): left, top, right, bottom.\n     */\n    setMargins: function(margins) {\n        $.console.assert($.type(margins) === 'object', '[Viewport.setMargins] margins must be an object');\n\n        this._margins = $.extend({\n            left: 0,\n            top: 0,\n            right: 0,\n            bottom: 0\n        }, margins);\n\n        this._updateContainerInnerSize();\n        if (this.viewer) {\n            this.viewer.forceRedraw();\n        }\n    },\n\n    /**\n     * Returns the bounds of the visible area in viewport coordinates.\n     * @function\n     * @param {Boolean} current - Pass true for the current location; defaults to false (target location).\n     * @returns {OpenSeadragon.Rect} The location you are zoomed/panned to, in viewport coordinates.\n     */\n    getBounds: function(current) {\n        return this.getBoundsNoRotate(current).rotate(-this.getRotation());\n    },\n\n    /**\n     * Returns the bounds of the visible area in viewport coordinates.\n     * This method ignores the viewport rotation. Use\n     * {@link OpenSeadragon.Viewport#getBounds} to take it into account.\n     * @function\n     * @param {Boolean} current - Pass true for the current location; defaults to false (target location).\n     * @returns {OpenSeadragon.Rect} The location you are zoomed/panned to, in viewport coordinates.\n     */\n    getBoundsNoRotate: function(current) {\n        var center = this.getCenter(current);\n        var width  = 1.0 / this.getZoom(current);\n        var height = width / this.getAspectRatio();\n\n        return new $.Rect(\n            center.x - (width / 2.0),\n            center.y - (height / 2.0),\n            width,\n            height\n        );\n    },\n\n    /**\n     * @function\n     * @param {Boolean} current - Pass true for the current location; defaults to false (target location).\n     * @returns {OpenSeadragon.Rect} The location you are zoomed/panned to,\n     * including the space taken by margins, in viewport coordinates.\n     */\n    getBoundsWithMargins: function(current) {\n        return this.getBoundsNoRotateWithMargins(current).rotate(\n            -this.getRotation(), this.getCenter(current));\n    },\n\n    /**\n     * @function\n     * @param {Boolean} current - Pass true for the current location; defaults to false (target location).\n     * @returns {OpenSeadragon.Rect} The location you are zoomed/panned to,\n     * including the space taken by margins, in viewport coordinates.\n     */\n    getBoundsNoRotateWithMargins: function(current) {\n        var bounds = this.getBoundsNoRotate(current);\n        var factor = this._containerInnerSize.x * this.getZoom(current);\n        bounds.x -= this._margins.left / factor;\n        bounds.y -= this._margins.top / factor;\n        bounds.width += (this._margins.left + this._margins.right) / factor;\n        bounds.height += (this._margins.top + this._margins.bottom) / factor;\n        return bounds;\n    },\n\n    /**\n     * @function\n     * @param {Boolean} current - Pass true for the current location; defaults to false (target location).\n     */\n    getCenter: function( current ) {\n        var centerCurrent = new $.Point(\n                this.centerSpringX.current.value,\n                this.centerSpringY.current.value\n            ),\n            centerTarget = new $.Point(\n                this.centerSpringX.target.value,\n                this.centerSpringY.target.value\n            ),\n            oldZoomPixel,\n            zoom,\n            width,\n            height,\n            bounds,\n            newZoomPixel,\n            deltaZoomPixels,\n            deltaZoomPoints;\n\n        if ( current ) {\n            return centerCurrent;\n        } else if ( !this.zoomPoint ) {\n            return centerTarget;\n        }\n\n        oldZoomPixel = this.pixelFromPoint(this.zoomPoint, true);\n\n        zoom    = this.getZoom();\n        width   = 1.0 / zoom;\n        height  = width / this.getAspectRatio();\n        bounds  = new $.Rect(\n            centerCurrent.x - width / 2.0,\n            centerCurrent.y - height / 2.0,\n            width,\n            height\n        );\n\n        newZoomPixel = this._pixelFromPoint(this.zoomPoint, bounds);\n        deltaZoomPixels = newZoomPixel.minus( oldZoomPixel );\n        deltaZoomPoints = deltaZoomPixels.divide( this._containerInnerSize.x * zoom );\n\n        return centerTarget.plus( deltaZoomPoints );\n    },\n\n    /**\n     * @function\n     * @param {Boolean} current - Pass true for the current location; defaults to false (target location).\n     */\n    getZoom: function( current ) {\n        if ( current ) {\n            return this.zoomSpring.current.value;\n        } else {\n            return this.zoomSpring.target.value;\n        }\n    },\n\n    // private\n    _applyZoomConstraints: function(zoom) {\n        return Math.max(\n            Math.min(zoom, this.getMaxZoom()),\n            this.getMinZoom());\n    },\n\n    /**\n     * @function\n     * @private\n     * @param {OpenSeadragon.Rect} bounds\n     * @return {OpenSeadragon.Rect} constrained bounds.\n     */\n    _applyBoundaryConstraints: function(bounds) {\n        var newBounds = new $.Rect(\n                bounds.x,\n                bounds.y,\n                bounds.width,\n                bounds.height);\n\n        if (this.wrapHorizontal) {\n            //do nothing\n        } else {\n            var horizontalThreshold = this.visibilityRatio * newBounds.width;\n            var boundsRight = newBounds.x + newBounds.width;\n            var contentRight = this._contentBoundsNoRotate.x + this._contentBoundsNoRotate.width;\n            var leftDx = this._contentBoundsNoRotate.x - boundsRight + horizontalThreshold;\n            var rightDx = contentRight - newBounds.x - horizontalThreshold;\n\n            if (horizontalThreshold > this._contentBoundsNoRotate.width) {\n                newBounds.x += (leftDx + rightDx) / 2;\n            } else if (rightDx < 0) {\n                newBounds.x += rightDx;\n            } else if (leftDx > 0) {\n                newBounds.x += leftDx;\n            }\n        }\n\n        if (this.wrapVertical) {\n            //do nothing\n        } else {\n            var verticalThreshold   = this.visibilityRatio * newBounds.height;\n            var boundsBottom = newBounds.y + newBounds.height;\n            var contentBottom = this._contentBoundsNoRotate.y + this._contentBoundsNoRotate.height;\n            var topDy = this._contentBoundsNoRotate.y - boundsBottom + verticalThreshold;\n            var bottomDy = contentBottom - newBounds.y - verticalThreshold;\n\n            if (verticalThreshold > this._contentBoundsNoRotate.height) {\n                newBounds.y += (topDy + bottomDy) / 2;\n            } else if (bottomDy < 0) {\n                newBounds.y += bottomDy;\n            } else if (topDy > 0) {\n                newBounds.y += topDy;\n            }\n        }\n\n        return newBounds;\n    },\n\n    /**\n     * @function\n     * @private\n     * @param {Boolean} [immediately=false] - whether the function that triggered this event was\n     * called with the \"immediately\" flag\n     */\n    _raiseConstraintsEvent: function(immediately) {\n        if (this.viewer) {\n            /**\n             * Raised when the viewport constraints are applied (see {@link OpenSeadragon.Viewport#applyConstraints}).\n             *\n             * @event constrain\n             * @memberof OpenSeadragon.Viewer\n             * @type {object}\n             * @property {OpenSeadragon.Viewer} eventSource - A reference to the Viewer which raised this event.\n             * @property {Boolean} immediately - whether the function that triggered this event was\n             * called with the \"immediately\" flag\n             * @property {?Object} userData - Arbitrary subscriber-defined object.\n             */\n            this.viewer.raiseEvent( 'constrain', {\n                immediately: immediately\n            });\n        }\n    },\n\n    /**\n     * Enforces the minZoom, maxZoom and visibilityRatio constraints by\n     * zooming and panning to the closest acceptable zoom and location.\n     * @function\n     * @param {Boolean} [immediately=false]\n     * @return {OpenSeadragon.Viewport} Chainable.\n     * @fires OpenSeadragon.Viewer.event:constrain\n     */\n    applyConstraints: function(immediately) {\n        var actualZoom = this.getZoom();\n        var constrainedZoom = this._applyZoomConstraints(actualZoom);\n\n        if (actualZoom !== constrainedZoom) {\n            this.zoomTo(constrainedZoom, this.zoomPoint, immediately);\n        }\n\n        var bounds = this.getBoundsNoRotate();\n        var constrainedBounds = this._applyBoundaryConstraints(bounds);\n        this._raiseConstraintsEvent(immediately);\n\n        if (bounds.x !== constrainedBounds.x ||\n            bounds.y !== constrainedBounds.y ||\n            immediately) {\n            this.fitBounds(\n                constrainedBounds.rotate(-this.getRotation()),\n                immediately);\n        }\n        return this;\n    },\n\n    /**\n     * Equivalent to {@link OpenSeadragon.Viewport#applyConstraints}\n     * @function\n     * @param {Boolean} [immediately=false]\n     * @return {OpenSeadragon.Viewport} Chainable.\n     * @fires OpenSeadragon.Viewer.event:constrain\n     */\n    ensureVisible: function(immediately) {\n        return this.applyConstraints(immediately);\n    },\n\n    /**\n     * @function\n     * @private\n     * @param {OpenSeadragon.Rect} bounds\n     * @param {Object} options (immediately=false, constraints=false)\n     * @return {OpenSeadragon.Viewport} Chainable.\n     */\n    _fitBounds: function(bounds, options) {\n        options = options || {};\n        var immediately = options.immediately || false;\n        var constraints = options.constraints || false;\n\n        var aspect = this.getAspectRatio();\n        var center = bounds.getCenter();\n\n        // Compute width and height of bounding box.\n        var newBounds = new $.Rect(\n            bounds.x,\n            bounds.y,\n            bounds.width,\n            bounds.height,\n            bounds.degrees + this.getRotation())\n            .getBoundingBox();\n\n        if (newBounds.getAspectRatio() >= aspect) {\n            newBounds.height = newBounds.width / aspect;\n        } else {\n            newBounds.width = newBounds.height * aspect;\n        }\n\n        // Compute x and y from width, height and center position\n        newBounds.x = center.x - newBounds.width / 2;\n        newBounds.y = center.y - newBounds.height / 2;\n        var newZoom = 1.0 / newBounds.width;\n\n        if (constraints) {\n            var newBoundsAspectRatio = newBounds.getAspectRatio();\n            var newConstrainedZoom = this._applyZoomConstraints(newZoom);\n\n            if (newZoom !== newConstrainedZoom) {\n                newZoom = newConstrainedZoom;\n                newBounds.width = 1.0 / newZoom;\n                newBounds.x = center.x - newBounds.width / 2;\n                newBounds.height = newBounds.width / newBoundsAspectRatio;\n                newBounds.y = center.y - newBounds.height / 2;\n            }\n\n            newBounds = this._applyBoundaryConstraints(newBounds);\n            center = newBounds.getCenter();\n            this._raiseConstraintsEvent(immediately);\n        }\n\n        if (immediately) {\n            this.panTo(center, true);\n            return this.zoomTo(newZoom, null, true);\n        }\n\n        this.panTo(this.getCenter(true), true);\n        this.zoomTo(this.getZoom(true), null, true);\n\n        var oldBounds = this.getBounds();\n        var oldZoom   = this.getZoom();\n\n        if (oldZoom === 0 || Math.abs(newZoom / oldZoom - 1) < 0.00000001) {\n            this.zoomTo(newZoom, true);\n            return this.panTo(center, immediately);\n        }\n\n        newBounds = newBounds.rotate(-this.getRotation());\n        var referencePoint = newBounds.getTopLeft().times(newZoom)\n            .minus(oldBounds.getTopLeft().times(oldZoom))\n            .divide(newZoom - oldZoom);\n\n        return this.zoomTo(newZoom, referencePoint, immediately);\n    },\n\n    /**\n     * Makes the viewport zoom and pan so that the specified bounds take\n     * as much space as possible in the viewport.\n     * Note: this method ignores the constraints (minZoom, maxZoom and\n     * visibilityRatio).\n     * Use {@link OpenSeadragon.Viewport#fitBoundsWithConstraints} to enforce\n     * them.\n     * @function\n     * @param {OpenSeadragon.Rect} bounds\n     * @param {Boolean} [immediately=false]\n     * @return {OpenSeadragon.Viewport} Chainable.\n     */\n    fitBounds: function(bounds, immediately) {\n        return this._fitBounds(bounds, {\n            immediately: immediately,\n            constraints: false\n        });\n    },\n\n    /**\n     * Makes the viewport zoom and pan so that the specified bounds take\n     * as much space as possible in the viewport while enforcing the constraints\n     * (minZoom, maxZoom and visibilityRatio).\n     * Note: because this method enforces the constraints, part of the\n     * provided bounds may end up outside of the viewport.\n     * Use {@link OpenSeadragon.Viewport#fitBounds} to ignore them.\n     * @function\n     * @param {OpenSeadragon.Rect} bounds\n     * @param {Boolean} [immediately=false]\n     * @return {OpenSeadragon.Viewport} Chainable.\n     */\n    fitBoundsWithConstraints: function(bounds, immediately) {\n        return this._fitBounds(bounds, {\n            immediately: immediately,\n            constraints: true\n        });\n    },\n\n    /**\n     * Zooms so the image just fills the viewer vertically.\n     * @param {Boolean} immediately\n     * @return {OpenSeadragon.Viewport} Chainable.\n     */\n    fitVertically: function(immediately) {\n        var box = new $.Rect(\n            this._contentBounds.x + (this._contentBounds.width / 2),\n            this._contentBounds.y,\n            0,\n            this._contentBounds.height);\n        return this.fitBounds(box, immediately);\n    },\n\n    /**\n     * Zooms so the image just fills the viewer horizontally.\n     * @param {Boolean} immediately\n     * @return {OpenSeadragon.Viewport} Chainable.\n     */\n    fitHorizontally: function(immediately) {\n        var box = new $.Rect(\n            this._contentBounds.x,\n            this._contentBounds.y + (this._contentBounds.height / 2),\n            this._contentBounds.width,\n            0);\n        return this.fitBounds(box, immediately);\n    },\n\n\n    /**\n     * Returns bounds taking constraints into account\n     * Added to improve constrained panning\n     * @param {Boolean} current - Pass true for the current location; defaults to false (target location).\n     * @return {OpenSeadragon.Viewport} Chainable.\n     */\n    getConstrainedBounds: function(current) {\n        var bounds,\n            constrainedBounds;\n\n        bounds = this.getBounds(current);\n\n        constrainedBounds = this._applyBoundaryConstraints(bounds);\n\n        return constrainedBounds;\n    },\n\n    /**\n     * @function\n     * @param {OpenSeadragon.Point} delta\n     * @param {Boolean} immediately\n     * @return {OpenSeadragon.Viewport} Chainable.\n     * @fires OpenSeadragon.Viewer.event:pan\n     */\n    panBy: function( delta, immediately ) {\n        var center = new $.Point(\n            this.centerSpringX.target.value,\n            this.centerSpringY.target.value\n        );\n        return this.panTo( center.plus( delta ), immediately );\n    },\n\n    /**\n     * @function\n     * @param {OpenSeadragon.Point} center\n     * @param {Boolean} immediately\n     * @return {OpenSeadragon.Viewport} Chainable.\n     * @fires OpenSeadragon.Viewer.event:pan\n     */\n    panTo: function( center, immediately ) {\n        if ( immediately ) {\n            this.centerSpringX.resetTo( center.x );\n            this.centerSpringY.resetTo( center.y );\n        } else {\n            this.centerSpringX.springTo( center.x );\n            this.centerSpringY.springTo( center.y );\n        }\n\n        if( this.viewer ){\n            /**\n             * Raised when the viewport is panned (see {@link OpenSeadragon.Viewport#panBy} and {@link OpenSeadragon.Viewport#panTo}).\n             *\n             * @event pan\n             * @memberof OpenSeadragon.Viewer\n             * @type {object}\n             * @property {OpenSeadragon.Viewer} eventSource - A reference to the Viewer which raised this event.\n             * @property {OpenSeadragon.Point} center\n             * @property {Boolean} immediately\n             * @property {?Object} userData - Arbitrary subscriber-defined object.\n             */\n            this.viewer.raiseEvent( 'pan', {\n                center: center,\n                immediately: immediately\n            });\n        }\n\n        return this;\n    },\n\n    /**\n     * @function\n     * @return {OpenSeadragon.Viewport} Chainable.\n     * @fires OpenSeadragon.Viewer.event:zoom\n     */\n    zoomBy: function(factor, refPoint, immediately) {\n        return this.zoomTo(\n            this.zoomSpring.target.value * factor, refPoint, immediately);\n    },\n\n    /**\n     * Zooms to the specified zoom level\n     * @function\n     * @param {Number} zoom The zoom level to zoom to.\n     * @param {OpenSeadragon.Point} [refPoint] The point which will stay at\n     * the same screen location. Defaults to the viewport center.\n     * @param {Boolean} [immediately=false]\n     * @return {OpenSeadragon.Viewport} Chainable.\n     * @fires OpenSeadragon.Viewer.event:zoom\n     */\n    zoomTo: function(zoom, refPoint, immediately) {\n        var _this = this;\n\n        this.zoomPoint = refPoint instanceof $.Point &&\n            !isNaN(refPoint.x) &&\n            !isNaN(refPoint.y) ?\n            refPoint :\n            null;\n\n        if (immediately) {\n            this._adjustCenterSpringsForZoomPoint(function() {\n                _this.zoomSpring.resetTo(zoom);\n            });\n        } else {\n            this.zoomSpring.springTo(zoom);\n        }\n\n        if (this.viewer) {\n            /**\n             * Raised when the viewport zoom level changes (see {@link OpenSeadragon.Viewport#zoomBy} and {@link OpenSeadragon.Viewport#zoomTo}).\n             *\n             * @event zoom\n             * @memberof OpenSeadragon.Viewer\n             * @type {object}\n             * @property {OpenSeadragon.Viewer} eventSource - A reference to the Viewer which raised this event.\n             * @property {Number} zoom\n             * @property {OpenSeadragon.Point} refPoint\n             * @property {Boolean} immediately\n             * @property {?Object} userData - Arbitrary subscriber-defined object.\n             */\n            this.viewer.raiseEvent('zoom', {\n                zoom: zoom,\n                refPoint: refPoint,\n                immediately: immediately\n            });\n        }\n\n        return this;\n    },\n\n    /**\n     * Rotates this viewport to the angle specified.\n     * @function\n     * @param {Number} degrees The degrees to set the rotation to.\n     * @return {OpenSeadragon.Viewport} Chainable.\n     */\n    setRotation: function(degrees) {\n        if (!this.viewer || !this.viewer.drawer.canRotate()) {\n            return this;\n        }\n        this.degrees = $.positiveModulo(degrees, 360);\n        this._setContentBounds(\n            this.viewer.world.getHomeBounds(),\n            this.viewer.world.getContentFactor());\n        this.viewer.forceRedraw();\n\n        /**\n         * Raised when rotation has been changed.\n         *\n         * @event rotate\n         * @memberof OpenSeadragon.Viewer\n         * @type {object}\n         * @property {OpenSeadragon.Viewer} eventSource - A reference to the Viewer which raised the event.\n         * @property {Number} degrees - The number of degrees the rotation was set to.\n         * @property {?Object} userData - Arbitrary subscriber-defined object.\n         */\n        this.viewer.raiseEvent('rotate', {degrees: degrees});\n        return this;\n    },\n\n    /**\n     * Gets the current rotation in degrees.\n     * @function\n     * @return {Number} The current rotation in degrees.\n     */\n    getRotation: function() {\n        return this.degrees;\n    },\n\n    /**\n     * @function\n     * @return {OpenSeadragon.Viewport} Chainable.\n     * @fires OpenSeadragon.Viewer.event:resize\n     */\n    resize: function( newContainerSize, maintain ) {\n        var oldBounds = this.getBoundsNoRotate(),\n            newBounds = oldBounds,\n            widthDeltaFactor;\n\n        this.containerSize.x = newContainerSize.x;\n        this.containerSize.y = newContainerSize.y;\n\n        this._updateContainerInnerSize();\n\n        if ( maintain ) {\n            // TODO: widthDeltaFactor will always be 1; probably not what's intended\n            widthDeltaFactor = newContainerSize.x / this.containerSize.x;\n            newBounds.width  = oldBounds.width * widthDeltaFactor;\n            newBounds.height = newBounds.width / this.getAspectRatio();\n        }\n\n        if( this.viewer ){\n            /**\n             * Raised when the viewer is resized (see {@link OpenSeadragon.Viewport#resize}).\n             *\n             * @event resize\n             * @memberof OpenSeadragon.Viewer\n             * @type {object}\n             * @property {OpenSeadragon.Viewer} eventSource - A reference to the Viewer which raised this event.\n             * @property {OpenSeadragon.Point} newContainerSize\n             * @property {Boolean} maintain\n             * @property {?Object} userData - Arbitrary subscriber-defined object.\n             */\n            this.viewer.raiseEvent( 'resize', {\n                newContainerSize: newContainerSize,\n                maintain: maintain\n            });\n        }\n\n        return this.fitBounds( newBounds, true );\n    },\n\n    // private\n    _updateContainerInnerSize: function() {\n        this._containerInnerSize = new $.Point(\n            Math.max(1, this.containerSize.x - (this._margins.left + this._margins.right)),\n            Math.max(1, this.containerSize.y - (this._margins.top + this._margins.bottom))\n        );\n    },\n\n    /**\n     * Update the zoom and center (X and Y) springs.\n     * @function\n     * @returns {Boolean} True if any change has been made, false otherwise.\n     */\n    update: function() {\n        var _this = this;\n        this._adjustCenterSpringsForZoomPoint(function() {\n            _this.zoomSpring.update();\n        });\n\n        this.centerSpringX.update();\n        this.centerSpringY.update();\n\n        var changed = this.centerSpringX.current.value !== this._oldCenterX ||\n            this.centerSpringY.current.value !== this._oldCenterY ||\n            this.zoomSpring.current.value !== this._oldZoom;\n\n        this._oldCenterX = this.centerSpringX.current.value;\n        this._oldCenterY = this.centerSpringY.current.value;\n        this._oldZoom    = this.zoomSpring.current.value;\n\n        return changed;\n    },\n\n    _adjustCenterSpringsForZoomPoint: function(zoomSpringHandler) {\n        if (this.zoomPoint) {\n            var oldZoomPixel = this.pixelFromPoint(this.zoomPoint, true);\n            zoomSpringHandler();\n            var newZoomPixel = this.pixelFromPoint(this.zoomPoint, true);\n\n            var deltaZoomPixels = newZoomPixel.minus(oldZoomPixel);\n            var deltaZoomPoints = this.deltaPointsFromPixels(\n                deltaZoomPixels, true);\n\n            this.centerSpringX.shiftBy(deltaZoomPoints.x);\n            this.centerSpringY.shiftBy(deltaZoomPoints.y);\n\n            if (this.zoomSpring.isAtTargetValue()) {\n                this.zoomPoint = null;\n            }\n        } else {\n            zoomSpringHandler();\n        }\n    },\n\n    /**\n     * Convert a delta (translation vector) from viewport coordinates to pixels\n     * coordinates. This method does not take rotation into account.\n     * Consider using deltaPixelsFromPoints if you need to account for rotation.\n     * @param {OpenSeadragon.Point} deltaPoints - The translation vector to convert.\n     * @param {Boolean} [current=false] - Pass true for the current location;\n     * defaults to false (target location).\n     * @returns {OpenSeadragon.Point}\n     */\n    deltaPixelsFromPointsNoRotate: function(deltaPoints, current) {\n        return deltaPoints.times(\n            this._containerInnerSize.x * this.getZoom(current)\n        );\n    },\n\n    /**\n     * Convert a delta (translation vector) from viewport coordinates to pixels\n     * coordinates.\n     * @param {OpenSeadragon.Point} deltaPoints - The translation vector to convert.\n     * @param {Boolean} [current=false] - Pass true for the current location;\n     * defaults to false (target location).\n     * @returns {OpenSeadragon.Point}\n     */\n    deltaPixelsFromPoints: function(deltaPoints, current) {\n        return this.deltaPixelsFromPointsNoRotate(\n            deltaPoints.rotate(this.getRotation()),\n            current);\n    },\n\n    /**\n     * Convert a delta (translation vector) from pixels coordinates to viewport\n     * coordinates. This method does not take rotation into account.\n     * Consider using deltaPointsFromPixels if you need to account for rotation.\n     * @param {OpenSeadragon.Point} deltaPixels - The translation vector to convert.\n     * @param {Boolean} [current=false] - Pass true for the current location;\n     * defaults to false (target location).\n     * @returns {OpenSeadragon.Point}\n     */\n    deltaPointsFromPixelsNoRotate: function(deltaPixels, current) {\n        return deltaPixels.divide(\n            this._containerInnerSize.x * this.getZoom(current)\n        );\n    },\n\n    /**\n     * Convert a delta (translation vector) from pixels coordinates to viewport\n     * coordinates.\n     * @param {OpenSeadragon.Point} deltaPixels - The translation vector to convert.\n     * @param {Boolean} [current=false] - Pass true for the current location;\n     * defaults to false (target location).\n     * @returns {OpenSeadragon.Point}\n     */\n    deltaPointsFromPixels: function(deltaPixels, current) {\n        return this.deltaPointsFromPixelsNoRotate(deltaPixels, current)\n            .rotate(-this.getRotation());\n    },\n\n    /**\n     * Convert viewport coordinates to pixels coordinates.\n     * This method does not take rotation into account.\n     * Consider using pixelFromPoint if you need to account for rotation.\n     * @param {OpenSeadragon.Point} point the viewport coordinates\n     * @param {Boolean} [current=false] - Pass true for the current location;\n     * defaults to false (target location).\n     * @returns {OpenSeadragon.Point}\n     */\n    pixelFromPointNoRotate: function(point, current) {\n        return this._pixelFromPointNoRotate(\n            point, this.getBoundsNoRotate(current));\n    },\n\n    /**\n     * Convert viewport coordinates to pixel coordinates.\n     * @param {OpenSeadragon.Point} point the viewport coordinates\n     * @param {Boolean} [current=false] - Pass true for the current location;\n     * defaults to false (target location).\n     * @returns {OpenSeadragon.Point}\n     */\n    pixelFromPoint: function(point, current) {\n        return this._pixelFromPoint(point, this.getBoundsNoRotate(current));\n    },\n\n    // private\n    _pixelFromPointNoRotate: function(point, bounds) {\n        return point.minus(\n            bounds.getTopLeft()\n        ).times(\n            this._containerInnerSize.x / bounds.width\n        ).plus(\n            new $.Point(this._margins.left, this._margins.top)\n        );\n    },\n\n    // private\n    _pixelFromPoint: function(point, bounds) {\n        return this._pixelFromPointNoRotate(\n            point.rotate(this.getRotation(), this.getCenter(true)),\n            bounds);\n    },\n\n    /**\n     * Convert pixel coordinates to viewport coordinates.\n     * This method does not take rotation into account.\n     * Consider using pointFromPixel if you need to account for rotation.\n     * @param {OpenSeadragon.Point} pixel Pixel coordinates\n     * @param {Boolean} [current=false] - Pass true for the current location;\n     * defaults to false (target location).\n     * @returns {OpenSeadragon.Point}\n     */\n    pointFromPixelNoRotate: function(pixel, current) {\n        var bounds = this.getBoundsNoRotate(current);\n        return pixel.minus(\n            new $.Point(this._margins.left, this._margins.top)\n        ).divide(\n            this._containerInnerSize.x / bounds.width\n        ).plus(\n            bounds.getTopLeft()\n        );\n    },\n\n    /**\n     * Convert pixel coordinates to viewport coordinates.\n     * @param {OpenSeadragon.Point} pixel Pixel coordinates\n     * @param {Boolean} [current=false] - Pass true for the current location;\n     * defaults to false (target location).\n     * @returns {OpenSeadragon.Point}\n     */\n    pointFromPixel: function(pixel, current) {\n        return this.pointFromPixelNoRotate(pixel, current).rotate(\n            -this.getRotation(),\n            this.getCenter(true)\n        );\n    },\n\n    // private\n    _viewportToImageDelta: function( viewerX, viewerY ) {\n        var scale = this._contentBoundsNoRotate.width;\n        return new $.Point(\n            viewerX * this._contentSizeNoRotate.x / scale,\n            viewerY * this._contentSizeNoRotate.x / scale);\n    },\n\n    /**\n     * Translates from OpenSeadragon viewer coordinate system to image coordinate system.\n     * This method can be called either by passing X,Y coordinates or an\n     * OpenSeadragon.Point\n     * Note: not accurate with multi-image; use TiledImage.viewportToImageCoordinates instead.\n     * @function\n     * @param {(OpenSeadragon.Point|Number)} viewerX either a point or the X\n     * coordinate in viewport coordinate system.\n     * @param {Number} [viewerY] Y coordinate in viewport coordinate system.\n     * @return {OpenSeadragon.Point} a point representing the coordinates in the image.\n     */\n    viewportToImageCoordinates: function(viewerX, viewerY) {\n        if (viewerX instanceof $.Point) {\n            //they passed a point instead of individual components\n            return this.viewportToImageCoordinates(viewerX.x, viewerX.y);\n        }\n\n        if (this.viewer) {\n            var count = this.viewer.world.getItemCount();\n            if (count > 1) {\n                if (!this.silenceMultiImageWarnings) {\n                    $.console.error('[Viewport.viewportToImageCoordinates] is not accurate ' +\n                        'with multi-image; use TiledImage.viewportToImageCoordinates instead.');\n                }\n            } else if (count === 1) {\n                // It is better to use TiledImage.viewportToImageCoordinates\n                // because this._contentBoundsNoRotate can not be relied on\n                // with clipping.\n                var item = this.viewer.world.getItemAt(0);\n                return item.viewportToImageCoordinates(viewerX, viewerY, true);\n            }\n        }\n\n        return this._viewportToImageDelta(\n            viewerX - this._contentBoundsNoRotate.x,\n            viewerY - this._contentBoundsNoRotate.y);\n    },\n\n    // private\n    _imageToViewportDelta: function( imageX, imageY ) {\n        var scale = this._contentBoundsNoRotate.width;\n        return new $.Point(\n            imageX / this._contentSizeNoRotate.x * scale,\n            imageY / this._contentSizeNoRotate.x * scale);\n    },\n\n    /**\n     * Translates from image coordinate system to OpenSeadragon viewer coordinate system\n     * This method can be called either by passing X,Y coordinates or an\n     * OpenSeadragon.Point\n     * Note: not accurate with multi-image; use TiledImage.imageToViewportCoordinates instead.\n     * @function\n     * @param {(OpenSeadragon.Point | Number)} imageX the point or the\n     * X coordinate in image coordinate system.\n     * @param {Number} [imageY] Y coordinate in image coordinate system.\n     * @return {OpenSeadragon.Point} a point representing the coordinates in the viewport.\n     */\n    imageToViewportCoordinates: function(imageX, imageY) {\n        if (imageX instanceof $.Point) {\n            //they passed a point instead of individual components\n            return this.imageToViewportCoordinates(imageX.x, imageX.y);\n        }\n\n        if (this.viewer) {\n            var count = this.viewer.world.getItemCount();\n            if (count > 1) {\n                if (!this.silenceMultiImageWarnings) {\n                    $.console.error('[Viewport.imageToViewportCoordinates] is not accurate ' +\n                        'with multi-image; use TiledImage.imageToViewportCoordinates instead.');\n                }\n            } else if (count === 1) {\n                // It is better to use TiledImage.viewportToImageCoordinates\n                // because this._contentBoundsNoRotate can not be relied on\n                // with clipping.\n                var item = this.viewer.world.getItemAt(0);\n                return item.imageToViewportCoordinates(imageX, imageY, true);\n            }\n        }\n\n        var point = this._imageToViewportDelta(imageX, imageY);\n        point.x += this._contentBoundsNoRotate.x;\n        point.y += this._contentBoundsNoRotate.y;\n        return point;\n    },\n\n    /**\n     * Translates from a rectangle which describes a portion of the image in\n     * pixel coordinates to OpenSeadragon viewport rectangle coordinates.\n     * This method can be called either by passing X,Y,width,height or an\n     * OpenSeadragon.Rect\n     * Note: not accurate with multi-image; use TiledImage.imageToViewportRectangle instead.\n     * @function\n     * @param {(OpenSeadragon.Rect | Number)} imageX the rectangle or the X\n     * coordinate of the top left corner of the rectangle in image coordinate system.\n     * @param {Number} [imageY] the Y coordinate of the top left corner of the rectangle\n     * in image coordinate system.\n     * @param {Number} [pixelWidth] the width in pixel of the rectangle.\n     * @param {Number} [pixelHeight] the height in pixel of the rectangle.\n     * @returns {OpenSeadragon.Rect} This image's bounds in viewport coordinates\n     */\n    imageToViewportRectangle: function(imageX, imageY, pixelWidth, pixelHeight) {\n        var rect = imageX;\n        if (!(rect instanceof $.Rect)) {\n            //they passed individual components instead of a rectangle\n            rect = new $.Rect(imageX, imageY, pixelWidth, pixelHeight);\n        }\n\n        if (this.viewer) {\n            var count = this.viewer.world.getItemCount();\n            if (count > 1) {\n                if (!this.silenceMultiImageWarnings) {\n                    $.console.error('[Viewport.imageToViewportRectangle] is not accurate ' +\n                       'with multi-image; use TiledImage.imageToViewportRectangle instead.');\n                }\n            } else if (count === 1) {\n                // It is better to use TiledImage.imageToViewportRectangle\n                // because this._contentBoundsNoRotate can not be relied on\n                // with clipping.\n                var item = this.viewer.world.getItemAt(0);\n                return item.imageToViewportRectangle(\n                    imageX, imageY, pixelWidth, pixelHeight, true);\n            }\n        }\n\n        var coordA = this.imageToViewportCoordinates(rect.x, rect.y);\n        var coordB = this._imageToViewportDelta(rect.width, rect.height);\n        return new $.Rect(\n            coordA.x,\n            coordA.y,\n            coordB.x,\n            coordB.y,\n            rect.degrees\n        );\n    },\n\n    /**\n     * Translates from a rectangle which describes a portion of\n     * the viewport in point coordinates to image rectangle coordinates.\n     * This method can be called either by passing X,Y,width,height or an\n     * OpenSeadragon.Rect\n     * Note: not accurate with multi-image; use TiledImage.viewportToImageRectangle instead.\n     * @function\n     * @param {(OpenSeadragon.Rect | Number)} viewerX either a rectangle or\n     * the X coordinate of the top left corner of the rectangle in viewport\n     * coordinate system.\n     * @param {Number} [viewerY] the Y coordinate of the top left corner of the rectangle\n     * in viewport coordinate system.\n     * @param {Number} [pointWidth] the width of the rectangle in viewport coordinate system.\n     * @param {Number} [pointHeight] the height of the rectangle in viewport coordinate system.\n     */\n    viewportToImageRectangle: function(viewerX, viewerY, pointWidth, pointHeight) {\n        var rect = viewerX;\n        if (!(rect instanceof $.Rect)) {\n            //they passed individual components instead of a rectangle\n            rect = new $.Rect(viewerX, viewerY, pointWidth, pointHeight);\n        }\n\n        if (this.viewer) {\n            var count = this.viewer.world.getItemCount();\n            if (count > 1) {\n                if (!this.silenceMultiImageWarnings) {\n                    $.console.error('[Viewport.viewportToImageRectangle] is not accurate ' +\n                        'with multi-image; use TiledImage.viewportToImageRectangle instead.');\n                }\n            } else if (count === 1) {\n                // It is better to use TiledImage.viewportToImageCoordinates\n                // because this._contentBoundsNoRotate can not be relied on\n                // with clipping.\n                var item = this.viewer.world.getItemAt(0);\n                return item.viewportToImageRectangle(\n                    viewerX, viewerY, pointWidth, pointHeight, true);\n            }\n        }\n\n        var coordA = this.viewportToImageCoordinates(rect.x, rect.y);\n        var coordB = this._viewportToImageDelta(rect.width, rect.height);\n        return new $.Rect(\n            coordA.x,\n            coordA.y,\n            coordB.x,\n            coordB.y,\n            rect.degrees\n        );\n    },\n\n    /**\n     * Convert pixel coordinates relative to the viewer element to image\n     * coordinates.\n     * Note: not accurate with multi-image.\n     * @param {OpenSeadragon.Point} pixel\n     * @returns {OpenSeadragon.Point}\n     */\n    viewerElementToImageCoordinates: function( pixel ) {\n        var point = this.pointFromPixel( pixel, true );\n        return this.viewportToImageCoordinates( point );\n    },\n\n    /**\n     * Convert pixel coordinates relative to the image to\n     * viewer element coordinates.\n     * Note: not accurate with multi-image.\n     * @param {OpenSeadragon.Point} pixel\n     * @returns {OpenSeadragon.Point}\n     */\n    imageToViewerElementCoordinates: function( pixel ) {\n        var point = this.imageToViewportCoordinates( pixel );\n        return this.pixelFromPoint( point, true );\n    },\n\n    /**\n     * Convert pixel coordinates relative to the window to image coordinates.\n     * Note: not accurate with multi-image.\n     * @param {OpenSeadragon.Point} pixel\n     * @returns {OpenSeadragon.Point}\n     */\n    windowToImageCoordinates: function(pixel) {\n        $.console.assert(this.viewer,\n            \"[Viewport.windowToImageCoordinates] the viewport must have a viewer.\");\n        var viewerCoordinates = pixel.minus(\n                $.getElementPosition(this.viewer.element));\n        return this.viewerElementToImageCoordinates(viewerCoordinates);\n    },\n\n    /**\n     * Convert image coordinates to pixel coordinates relative to the window.\n     * Note: not accurate with multi-image.\n     * @param {OpenSeadragon.Point} pixel\n     * @returns {OpenSeadragon.Point}\n     */\n    imageToWindowCoordinates: function(pixel) {\n        $.console.assert(this.viewer,\n            \"[Viewport.imageToWindowCoordinates] the viewport must have a viewer.\");\n        var viewerCoordinates = this.imageToViewerElementCoordinates(pixel);\n        return viewerCoordinates.plus(\n                $.getElementPosition(this.viewer.element));\n    },\n\n    /**\n     * Convert pixel coordinates relative to the viewer element to viewport\n     * coordinates.\n     * @param {OpenSeadragon.Point} pixel\n     * @returns {OpenSeadragon.Point}\n     */\n    viewerElementToViewportCoordinates: function( pixel ) {\n        return this.pointFromPixel( pixel, true );\n    },\n\n    /**\n     * Convert viewport coordinates to pixel coordinates relative to the\n     * viewer element.\n     * @param {OpenSeadragon.Point} point\n     * @returns {OpenSeadragon.Point}\n     */\n    viewportToViewerElementCoordinates: function( point ) {\n        return this.pixelFromPoint( point, true );\n    },\n\n    /**\n     * Convert a rectangle in pixel coordinates relative to the viewer element\n     * to viewport coordinates.\n     * @param {OpenSeadragon.Rect} rectangle the rectangle to convert\n     * @returns {OpenSeadragon.Rect} the converted rectangle\n     */\n    viewerElementToViewportRectangle: function(rectangle) {\n        return $.Rect.fromSummits(\n            this.pointFromPixel(rectangle.getTopLeft(), true),\n            this.pointFromPixel(rectangle.getTopRight(), true),\n            this.pointFromPixel(rectangle.getBottomLeft(), true)\n        );\n    },\n\n    /**\n     * Convert a rectangle in viewport coordinates to pixel coordinates relative\n     * to the viewer element.\n     * @param {OpenSeadragon.Rect} rectangle the rectangle to convert\n     * @returns {OpenSeadragon.Rect} the converted rectangle\n     */\n    viewportToViewerElementRectangle: function(rectangle) {\n        return $.Rect.fromSummits(\n            this.pixelFromPoint(rectangle.getTopLeft(), true),\n            this.pixelFromPoint(rectangle.getTopRight(), true),\n            this.pixelFromPoint(rectangle.getBottomLeft(), true)\n        );\n    },\n\n    /**\n     * Convert pixel coordinates relative to the window to viewport coordinates.\n     * @param {OpenSeadragon.Point} pixel\n     * @returns {OpenSeadragon.Point}\n     */\n    windowToViewportCoordinates: function(pixel) {\n        $.console.assert(this.viewer,\n            \"[Viewport.windowToViewportCoordinates] the viewport must have a viewer.\");\n        var viewerCoordinates = pixel.minus(\n                $.getElementPosition(this.viewer.element));\n        return this.viewerElementToViewportCoordinates(viewerCoordinates);\n    },\n\n    /**\n     * Convert viewport coordinates to pixel coordinates relative to the window.\n     * @param {OpenSeadragon.Point} point\n     * @returns {OpenSeadragon.Point}\n     */\n    viewportToWindowCoordinates: function(point) {\n        $.console.assert(this.viewer,\n            \"[Viewport.viewportToWindowCoordinates] the viewport must have a viewer.\");\n        var viewerCoordinates = this.viewportToViewerElementCoordinates(point);\n        return viewerCoordinates.plus(\n                $.getElementPosition(this.viewer.element));\n    },\n\n    /**\n     * Convert a viewport zoom to an image zoom.\n     * Image zoom: ratio of the original image size to displayed image size.\n     * 1 means original image size, 0.5 half size...\n     * Viewport zoom: ratio of the displayed image's width to viewport's width.\n     * 1 means identical width, 2 means image's width is twice the viewport's width...\n     * Note: not accurate with multi-image.\n     * @function\n     * @param {Number} viewportZoom The viewport zoom\n     * target zoom.\n     * @returns {Number} imageZoom The image zoom\n     */\n    viewportToImageZoom: function(viewportZoom) {\n        if (this.viewer) {\n            var count = this.viewer.world.getItemCount();\n            if (count > 1) {\n                if (!this.silenceMultiImageWarnings) {\n                    $.console.error('[Viewport.viewportToImageZoom] is not ' +\n                        'accurate with multi-image.');\n                }\n            } else if (count === 1) {\n                // It is better to use TiledImage.viewportToImageZoom\n                // because this._contentBoundsNoRotate can not be relied on\n                // with clipping.\n                var item = this.viewer.world.getItemAt(0);\n                return item.viewportToImageZoom(viewportZoom);\n            }\n        }\n\n        var imageWidth = this._contentSizeNoRotate.x;\n        var containerWidth = this._containerInnerSize.x;\n        var scale = this._contentBoundsNoRotate.width;\n        var viewportToImageZoomRatio = (containerWidth / imageWidth) * scale;\n        return viewportZoom * viewportToImageZoomRatio;\n    },\n\n    /**\n     * Convert an image zoom to a viewport zoom.\n     * Image zoom: ratio of the original image size to displayed image size.\n     * 1 means original image size, 0.5 half size...\n     * Viewport zoom: ratio of the displayed image's width to viewport's width.\n     * 1 means identical width, 2 means image's width is twice the viewport's width...\n     * Note: not accurate with multi-image.\n     * @function\n     * @param {Number} imageZoom The image zoom\n     * target zoom.\n     * @returns {Number} viewportZoom The viewport zoom\n     */\n    imageToViewportZoom: function(imageZoom) {\n        if (this.viewer) {\n            var count = this.viewer.world.getItemCount();\n            if (count > 1) {\n                if (!this.silenceMultiImageWarnings) {\n                    $.console.error('[Viewport.imageToViewportZoom] is not accurate ' +\n                        'with multi-image.');\n                }\n            } else if (count === 1) {\n                // It is better to use TiledImage.imageToViewportZoom\n                // because this._contentBoundsNoRotate can not be relied on\n                // with clipping.\n                var item = this.viewer.world.getItemAt(0);\n                return item.imageToViewportZoom(imageZoom);\n            }\n        }\n\n        var imageWidth = this._contentSizeNoRotate.x;\n        var containerWidth = this._containerInnerSize.x;\n        var scale = this._contentBoundsNoRotate.width;\n        var viewportToImageZoomRatio = (imageWidth / containerWidth) / scale;\n        return imageZoom * viewportToImageZoomRatio;\n    },\n\n    /**\n     * Toggles flip state and demands a new drawing on navigator and viewer objects.\n     * @function\n     * @return {OpenSeadragon.Viewport} Chainable.\n     */\n    toggleFlip: function() {\n      this.setFlip(!this.getFlip());\n      return this;\n    },\n\n    /**\n     * Get flip state stored on viewport.\n     * @function\n     * @return {Boolean} Flip state.\n     */\n    getFlip: function() {\n      return this.flipped;\n    },\n\n    /**\n     * Sets flip state according to the state input argument.\n     * @function\n     * @param {Boolean} state - Flip state to set.\n     * @return {OpenSeadragon.Viewport} Chainable.\n     */\n    setFlip: function( state ) {\n      if ( this.flipped === state ) {\n        return this;\n      }\n\n      this.flipped = state;\n      if(this.viewer.navigator){\n        this.viewer.navigator.setFlip(this.getFlip());\n      }\n      this.viewer.forceRedraw();\n\n      /**\n       * Raised when flip state has been changed.\n       *\n       * @event flip\n       * @memberof OpenSeadragon.Viewer\n       * @type {object}\n       * @property {OpenSeadragon.Viewer} eventSource - A reference to the Viewer which raised the event.\n       * @property {Number} flipped - The flip state after this change.\n       * @property {?Object} userData - Arbitrary subscriber-defined object.\n       */\n      this.viewer.raiseEvent('flip', {flipped: state});\n      return this;\n    }\n\n};\n\n}( OpenSeadragon ));\n\n/*\n * OpenSeadragon - TiledImage\n *\n * Copyright (C) 2009 CodePlex Foundation\n * Copyright (C) 2010-2013 OpenSeadragon contributors\n *\n * Redistribution and use in source and binary forms, with or without\n * modification, are permitted provided that the following conditions are\n * met:\n *\n * - Redistributions of source code must retain the above copyright notice,\n *   this list of conditions and the following disclaimer.\n *\n * - Redistributions in binary form must reproduce the above copyright\n *   notice, this list of conditions and the following disclaimer in the\n *   documentation and/or other materials provided with the distribution.\n *\n * - Neither the name of CodePlex Foundation nor the names of its\n *   contributors may be used to endorse or promote products derived from\n *   this software without specific prior written permission.\n *\n * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS\n * \"AS IS\" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT\n * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR\n * A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT\n * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,\n * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED\n * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR\n * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF\n * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING\n * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS\n * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.\n */\n\n(function( $ ){\n\n/**\n * You shouldn't have to create a TiledImage instance directly; get it asynchronously by\n * using {@link OpenSeadragon.Viewer#open} or {@link OpenSeadragon.Viewer#addTiledImage} instead.\n * @class TiledImage\n * @memberof OpenSeadragon\n * @extends OpenSeadragon.EventSource\n * @classdesc Handles rendering of tiles for an {@link OpenSeadragon.Viewer}.\n * A new instance is created for each TileSource opened.\n * @param {Object} options - Configuration for this TiledImage.\n * @param {OpenSeadragon.TileSource} options.source - The TileSource that defines this TiledImage.\n * @param {OpenSeadragon.Viewer} options.viewer - The Viewer that owns this TiledImage.\n * @param {OpenSeadragon.TileCache} options.tileCache - The TileCache for this TiledImage to use.\n * @param {OpenSeadragon.Drawer} options.drawer - The Drawer for this TiledImage to draw onto.\n * @param {OpenSeadragon.ImageLoader} options.imageLoader - The ImageLoader for this TiledImage to use.\n * @param {Number} [options.x=0] - Left position, in viewport coordinates.\n * @param {Number} [options.y=0] - Top position, in viewport coordinates.\n * @param {Number} [options.width=1] - Width, in viewport coordinates.\n * @param {Number} [options.height] - Height, in viewport coordinates.\n * @param {OpenSeadragon.Rect} [options.fitBounds] The bounds in viewport coordinates\n * to fit the image into. If specified, x, y, width and height get ignored.\n * @param {OpenSeadragon.Placement} [options.fitBoundsPlacement=OpenSeadragon.Placement.CENTER]\n * How to anchor the image in the bounds if options.fitBounds is set.\n * @param {OpenSeadragon.Rect} [options.clip] - An area, in image pixels, to clip to\n * (portions of the image outside of this area will not be visible). Only works on\n * browsers that support the HTML5 canvas.\n * @param {Number} [options.springStiffness] - See {@link OpenSeadragon.Options}.\n * @param {Boolean} [options.animationTime] - See {@link OpenSeadragon.Options}.\n * @param {Number} [options.minZoomImageRatio] - See {@link OpenSeadragon.Options}.\n * @param {Boolean} [options.wrapHorizontal] - See {@link OpenSeadragon.Options}.\n * @param {Boolean} [options.wrapVertical] - See {@link OpenSeadragon.Options}.\n * @param {Boolean} [options.immediateRender] - See {@link OpenSeadragon.Options}.\n * @param {Number} [options.blendTime] - See {@link OpenSeadragon.Options}.\n * @param {Boolean} [options.alwaysBlend] - See {@link OpenSeadragon.Options}.\n * @param {Number} [options.minPixelRatio] - See {@link OpenSeadragon.Options}.\n * @param {Number} [options.smoothTileEdgesMinZoom] - See {@link OpenSeadragon.Options}.\n * @param {Boolean} [options.iOSDevice] - See {@link OpenSeadragon.Options}.\n * @param {Number} [options.opacity=1] - Set to draw at proportional opacity. If zero, images will not draw.\n * @param {Boolean} [options.preload=false] - Set true to load even when the image is hidden by zero opacity.\n * @param {String} [options.compositeOperation] - How the image is composited onto other images; see compositeOperation in {@link OpenSeadragon.Options} for possible\n values.\n * @param {Boolean} [options.debugMode] - See {@link OpenSeadragon.Options}.\n * @param {String|CanvasGradient|CanvasPattern|Function} [options.placeholderFillStyle] - See {@link OpenSeadragon.Options}.\n * @param {String|Boolean} [options.crossOriginPolicy] - See {@link OpenSeadragon.Options}.\n * @param {Boolean} [options.ajaxWithCredentials] - See {@link OpenSeadragon.Options}.\n * @param {Boolean} [options.loadTilesWithAjax]\n *      Whether to load tile data using AJAX requests.\n *      Defaults to the setting in {@link OpenSeadragon.Options}.\n * @param {Object} [options.ajaxHeaders={}]\n *      A set of headers to include when making tile AJAX requests.\n */\n$.TiledImage = function( options ) {\n    var _this = this;\n    /**\n     * The {@link OpenSeadragon.TileSource} that defines this TiledImage.\n     * @member {OpenSeadragon.TileSource} source\n     * @memberof OpenSeadragon.TiledImage#\n     */\n    $.console.assert( options.tileCache, \"[TiledImage] options.tileCache is required\" );\n    $.console.assert( options.drawer, \"[TiledImage] options.drawer is required\" );\n    $.console.assert( options.viewer, \"[TiledImage] options.viewer is required\" );\n    $.console.assert( options.imageLoader, \"[TiledImage] options.imageLoader is required\" );\n    $.console.assert( options.source, \"[TiledImage] options.source is required\" );\n    $.console.assert(!options.clip || options.clip instanceof $.Rect,\n        \"[TiledImage] options.clip must be an OpenSeadragon.Rect if present\");\n\n    $.EventSource.call( this );\n\n    this._tileCache = options.tileCache;\n    delete options.tileCache;\n\n    this._drawer = options.drawer;\n    delete options.drawer;\n\n    this._imageLoader = options.imageLoader;\n    delete options.imageLoader;\n\n    if (options.clip instanceof $.Rect) {\n        this._clip = options.clip.clone();\n    }\n\n    delete options.clip;\n\n    var x = options.x || 0;\n    delete options.x;\n    var y = options.y || 0;\n    delete options.y;\n\n    // Ratio of zoomable image height to width.\n    this.normHeight = options.source.dimensions.y / options.source.dimensions.x;\n    this.contentAspectX = options.source.dimensions.x / options.source.dimensions.y;\n\n    var scale = 1;\n    if ( options.width ) {\n        scale = options.width;\n        delete options.width;\n\n        if ( options.height ) {\n            $.console.error( \"specifying both width and height to a tiledImage is not supported\" );\n            delete options.height;\n        }\n    } else if ( options.height ) {\n        scale = options.height / this.normHeight;\n        delete options.height;\n    }\n\n    var fitBounds = options.fitBounds;\n    delete options.fitBounds;\n    var fitBoundsPlacement = options.fitBoundsPlacement || OpenSeadragon.Placement.CENTER;\n    delete options.fitBoundsPlacement;\n\n    var degrees = options.degrees || 0;\n    delete options.degrees;\n\n    $.extend( true, this, {\n\n        //internal state properties\n        viewer:         null,\n        tilesMatrix:    {},    // A '3d' dictionary [level][x][y] --> Tile.\n        coverage:       {},    // A '3d' dictionary [level][x][y] --> Boolean; shows what areas have been drawn.\n        loadingCoverage: {},   // A '3d' dictionary [level][x][y] --> Boolean; shows what areas are loaded or are being loaded/blended.\n        lastDrawn:      [],    // An unordered list of Tiles drawn last frame.\n        lastResetTime:  0,     // Last time for which the tiledImage was reset.\n        _midDraw:       false, // Is the tiledImage currently updating the viewport?\n        _needsDraw:     true,  // Does the tiledImage need to update the viewport again?\n        _hasOpaqueTile: false,  // Do we have even one fully opaque tile?\n        _tilesLoading:  0,     // The number of pending tile requests.\n        //configurable settings\n        springStiffness:                   $.DEFAULT_SETTINGS.springStiffness,\n        animationTime:                     $.DEFAULT_SETTINGS.animationTime,\n        minZoomImageRatio:                 $.DEFAULT_SETTINGS.minZoomImageRatio,\n        wrapHorizontal:                    $.DEFAULT_SETTINGS.wrapHorizontal,\n        wrapVertical:                      $.DEFAULT_SETTINGS.wrapVertical,\n        immediateRender:                   $.DEFAULT_SETTINGS.immediateRender,\n        blendTime:                         $.DEFAULT_SETTINGS.blendTime,\n        alwaysBlend:                       $.DEFAULT_SETTINGS.alwaysBlend,\n        minPixelRatio:                     $.DEFAULT_SETTINGS.minPixelRatio,\n        smoothTileEdgesMinZoom:            $.DEFAULT_SETTINGS.smoothTileEdgesMinZoom,\n        iOSDevice:                         $.DEFAULT_SETTINGS.iOSDevice,\n        debugMode:                         $.DEFAULT_SETTINGS.debugMode,\n        crossOriginPolicy:                 $.DEFAULT_SETTINGS.crossOriginPolicy,\n        ajaxWithCredentials:               $.DEFAULT_SETTINGS.ajaxWithCredentials,\n        placeholderFillStyle:              $.DEFAULT_SETTINGS.placeholderFillStyle,\n        opacity:                           $.DEFAULT_SETTINGS.opacity,\n        preload:                           $.DEFAULT_SETTINGS.preload,\n        compositeOperation:                $.DEFAULT_SETTINGS.compositeOperation,\n        subPixelRoundingForTransparency:   $.DEFAULT_SETTINGS.subPixelRoundingForTransparency\n    }, options );\n\n    this._preload = this.preload;\n    delete this.preload;\n\n    this._fullyLoaded = false;\n\n    this._xSpring = new $.Spring({\n        initial: x,\n        springStiffness: this.springStiffness,\n        animationTime: this.animationTime\n    });\n\n    this._ySpring = new $.Spring({\n        initial: y,\n        springStiffness: this.springStiffness,\n        animationTime: this.animationTime\n    });\n\n    this._scaleSpring = new $.Spring({\n        initial: scale,\n        springStiffness: this.springStiffness,\n        animationTime: this.animationTime\n    });\n\n    this._degreesSpring = new $.Spring({\n        initial: degrees,\n        springStiffness: this.springStiffness,\n        animationTime: this.animationTime\n    });\n\n    this._updateForScale();\n\n    if (fitBounds) {\n        this.fitBounds(fitBounds, fitBoundsPlacement, true);\n    }\n\n    // We need a callback to give image manipulation a chance to happen\n    this._drawingHandler = function(args) {\n        /**\n         * This event is fired just before the tile is drawn giving the application a chance to alter the image.\n         *\n         * NOTE: This event is only fired when the drawer is using a &lt;canvas&gt;.\n         *\n         * @event tile-drawing\n         * @memberof OpenSeadragon.Viewer\n         * @type {object}\n         * @property {OpenSeadragon.Viewer} eventSource - A reference to the Viewer which raised the event.\n         * @property {OpenSeadragon.Tile} tile - The Tile being drawn.\n         * @property {OpenSeadragon.TiledImage} tiledImage - Which TiledImage is being drawn.\n         * @property {OpenSeadragon.Tile} context - The HTML canvas context being drawn into.\n         * @property {OpenSeadragon.Tile} rendered - The HTML canvas context containing the tile imagery.\n         * @property {?Object} userData - Arbitrary subscriber-defined object.\n         */\n        _this.viewer.raiseEvent('tile-drawing', $.extend({\n            tiledImage: _this\n        }, args));\n    };\n};\n\n$.extend($.TiledImage.prototype, $.EventSource.prototype, /** @lends OpenSeadragon.TiledImage.prototype */{\n    /**\n     * @returns {Boolean} Whether the TiledImage needs to be drawn.\n     */\n    needsDraw: function() {\n        return this._needsDraw;\n    },\n\n    /**\n     * @returns {Boolean} Whether all tiles necessary for this TiledImage to draw at the current view have been loaded.\n     */\n    getFullyLoaded: function() {\n        return this._fullyLoaded;\n    },\n\n    // private\n    _setFullyLoaded: function(flag) {\n        if (flag === this._fullyLoaded) {\n            return;\n        }\n\n        this._fullyLoaded = flag;\n\n        /**\n         * Fired when the TiledImage's \"fully loaded\" flag (whether all tiles necessary for this TiledImage\n         * to draw at the current view have been loaded) changes.\n         *\n         * @event fully-loaded-change\n         * @memberof OpenSeadragon.TiledImage\n         * @type {object}\n         * @property {Boolean} fullyLoaded - The new \"fully loaded\" value.\n         * @property {OpenSeadragon.TiledImage} eventSource - A reference to the TiledImage which raised the event.\n         * @property {?Object} userData - Arbitrary subscriber-defined object.\n         */\n        this.raiseEvent('fully-loaded-change', {\n            fullyLoaded: this._fullyLoaded\n        });\n    },\n\n    /**\n     * Clears all tiles and triggers an update on the next call to\n     * {@link OpenSeadragon.TiledImage#update}.\n     */\n    reset: function() {\n        this._tileCache.clearTilesFor(this);\n        this.lastResetTime = $.now();\n        this._needsDraw = true;\n    },\n\n    /**\n     * Updates the TiledImage's bounds, animating if needed.\n     * @returns {Boolean} Whether the TiledImage animated.\n     */\n    update: function() {\n        var xUpdated = this._xSpring.update();\n        var yUpdated = this._ySpring.update();\n        var scaleUpdated = this._scaleSpring.update();\n        var degreesUpdated = this._degreesSpring.update();\n\n        if (xUpdated || yUpdated || scaleUpdated || degreesUpdated) {\n            this._updateForScale();\n            this._needsDraw = true;\n            return true;\n        }\n\n        return false;\n    },\n\n    /**\n     * Draws the TiledImage to its Drawer.\n     */\n    draw: function() {\n        if (this.opacity !== 0 || this._preload) {\n            this._midDraw = true;\n            this._updateViewport();\n            this._midDraw = false;\n        }\n        // Images with opacity 0 should not need to be drawn in future. this._needsDraw = false is set in this._updateViewport() for other images.\n        else {\n            this._needsDraw = false;\n        }\n    },\n\n    /**\n     * Destroy the TiledImage (unload current loaded tiles).\n     */\n    destroy: function() {\n        this.reset();\n\n        if (this.source.destroy) {\n            this.source.destroy();\n        }\n    },\n\n    /**\n     * Get this TiledImage's bounds in viewport coordinates.\n     * @param {Boolean} [current=false] - Pass true for the current location;\n     * false for target location.\n     * @returns {OpenSeadragon.Rect} This TiledImage's bounds in viewport coordinates.\n     */\n    getBounds: function(current) {\n        return this.getBoundsNoRotate(current)\n            .rotate(this.getRotation(current), this._getRotationPoint(current));\n    },\n\n    /**\n     * Get this TiledImage's bounds in viewport coordinates without taking\n     * rotation into account.\n     * @param {Boolean} [current=false] - Pass true for the current location;\n     * false for target location.\n     * @returns {OpenSeadragon.Rect} This TiledImage's bounds in viewport coordinates.\n     */\n    getBoundsNoRotate: function(current) {\n        return current ?\n            new $.Rect(\n                this._xSpring.current.value,\n                this._ySpring.current.value,\n                this._worldWidthCurrent,\n                this._worldHeightCurrent) :\n            new $.Rect(\n                this._xSpring.target.value,\n                this._ySpring.target.value,\n                this._worldWidthTarget,\n                this._worldHeightTarget);\n    },\n\n    // deprecated\n    getWorldBounds: function() {\n        $.console.error('[TiledImage.getWorldBounds] is deprecated; use TiledImage.getBounds instead');\n        return this.getBounds();\n    },\n\n    /**\n     * Get the bounds of the displayed part of the tiled image.\n     * @param {Boolean} [current=false] Pass true for the current location,\n     * false for the target location.\n     * @returns {$.Rect} The clipped bounds in viewport coordinates.\n     */\n    getClippedBounds: function(current) {\n        var bounds = this.getBoundsNoRotate(current);\n        if (this._clip) {\n            var worldWidth = current ?\n                this._worldWidthCurrent : this._worldWidthTarget;\n            var ratio = worldWidth / this.source.dimensions.x;\n            var clip = this._clip.times(ratio);\n            bounds = new $.Rect(\n                bounds.x + clip.x,\n                bounds.y + clip.y,\n                clip.width,\n                clip.height);\n        }\n        return bounds.rotate(this.getRotation(current), this._getRotationPoint(current));\n    },\n\n    /**\n     * @function\n     * @param {Number} level\n     * @param {Number} x\n     * @param {Number} y\n     * @returns {OpenSeadragon.Rect} Where this tile fits (in normalized coordinates).\n     */\n    getTileBounds: function( level, x, y ) {\n        var numTiles = this.source.getNumTiles(level);\n        var xMod    = ( numTiles.x + ( x % numTiles.x ) ) % numTiles.x;\n        var yMod    = ( numTiles.y + ( y % numTiles.y ) ) % numTiles.y;\n        var bounds = this.source.getTileBounds(level, xMod, yMod);\n        if (this.getFlip()) {\n            bounds.x = 1 - bounds.x - bounds.width;\n        }\n        bounds.x += (x - xMod) / numTiles.x;\n        bounds.y += (this._worldHeightCurrent / this._worldWidthCurrent) * ((y - yMod) / numTiles.y);\n        return bounds;\n    },\n\n    /**\n     * @returns {OpenSeadragon.Point} This TiledImage's content size, in original pixels.\n     */\n    getContentSize: function() {\n        return new $.Point(this.source.dimensions.x, this.source.dimensions.y);\n    },\n\n    /**\n     * @returns {OpenSeadragon.Point} The TiledImage's content size, in window coordinates.\n     */\n    getSizeInWindowCoordinates: function() {\n        var topLeft = this.imageToWindowCoordinates(new $.Point(0, 0));\n        var bottomRight = this.imageToWindowCoordinates(this.getContentSize());\n        return new $.Point(bottomRight.x - topLeft.x, bottomRight.y - topLeft.y);\n    },\n\n    // private\n    _viewportToImageDelta: function( viewerX, viewerY, current ) {\n        var scale = (current ? this._scaleSpring.current.value : this._scaleSpring.target.value);\n        return new $.Point(viewerX * (this.source.dimensions.x / scale),\n            viewerY * ((this.source.dimensions.y * this.contentAspectX) / scale));\n    },\n\n    /**\n     * Translates from OpenSeadragon viewer coordinate system to image coordinate system.\n     * This method can be called either by passing X,Y coordinates or an {@link OpenSeadragon.Point}.\n     * @param {Number|OpenSeadragon.Point} viewerX - The X coordinate or point in viewport coordinate system.\n     * @param {Number} [viewerY] - The Y coordinate in viewport coordinate system.\n     * @param {Boolean} [current=false] - Pass true to use the current location; false for target location.\n     * @return {OpenSeadragon.Point} A point representing the coordinates in the image.\n     */\n    viewportToImageCoordinates: function(viewerX, viewerY, current) {\n        var point;\n        if (viewerX instanceof $.Point) {\n            //they passed a point instead of individual components\n            current = viewerY;\n            point = viewerX;\n        } else {\n            point = new $.Point(viewerX, viewerY);\n        }\n\n        point = point.rotate(-this.getRotation(current), this._getRotationPoint(current));\n        return current ?\n            this._viewportToImageDelta(\n                point.x - this._xSpring.current.value,\n                point.y - this._ySpring.current.value) :\n            this._viewportToImageDelta(\n                point.x - this._xSpring.target.value,\n                point.y - this._ySpring.target.value);\n    },\n\n    // private\n    _imageToViewportDelta: function( imageX, imageY, current ) {\n        var scale = (current ? this._scaleSpring.current.value : this._scaleSpring.target.value);\n        return new $.Point((imageX / this.source.dimensions.x) * scale,\n            (imageY / this.source.dimensions.y / this.contentAspectX) * scale);\n    },\n\n    /**\n     * Translates from image coordinate system to OpenSeadragon viewer coordinate system\n     * This method can be called either by passing X,Y coordinates or an {@link OpenSeadragon.Point}.\n     * @param {Number|OpenSeadragon.Point} imageX - The X coordinate or point in image coordinate system.\n     * @param {Number} [imageY] - The Y coordinate in image coordinate system.\n     * @param {Boolean} [current=false] - Pass true to use the current location; false for target location.\n     * @return {OpenSeadragon.Point} A point representing the coordinates in the viewport.\n     */\n    imageToViewportCoordinates: function(imageX, imageY, current) {\n        if (imageX instanceof $.Point) {\n            //they passed a point instead of individual components\n            current = imageY;\n            imageY = imageX.y;\n            imageX = imageX.x;\n        }\n\n        var point = this._imageToViewportDelta(imageX, imageY);\n        if (current) {\n            point.x += this._xSpring.current.value;\n            point.y += this._ySpring.current.value;\n        } else {\n            point.x += this._xSpring.target.value;\n            point.y += this._ySpring.target.value;\n        }\n\n        return point.rotate(this.getRotation(current), this._getRotationPoint(current));\n    },\n\n    /**\n     * Translates from a rectangle which describes a portion of the image in\n     * pixel coordinates to OpenSeadragon viewport rectangle coordinates.\n     * This method can be called either by passing X,Y,width,height or an {@link OpenSeadragon.Rect}.\n     * @param {Number|OpenSeadragon.Rect} imageX - The left coordinate or rectangle in image coordinate system.\n     * @param {Number} [imageY] - The top coordinate in image coordinate system.\n     * @param {Number} [pixelWidth] - The width in pixel of the rectangle.\n     * @param {Number} [pixelHeight] - The height in pixel of the rectangle.\n     * @param {Boolean} [current=false] - Pass true to use the current location; false for target location.\n     * @return {OpenSeadragon.Rect} A rect representing the coordinates in the viewport.\n     */\n    imageToViewportRectangle: function(imageX, imageY, pixelWidth, pixelHeight, current) {\n        var rect = imageX;\n        if (rect instanceof $.Rect) {\n            //they passed a rect instead of individual components\n            current = imageY;\n        } else {\n            rect = new $.Rect(imageX, imageY, pixelWidth, pixelHeight);\n        }\n\n        var coordA = this.imageToViewportCoordinates(rect.getTopLeft(), current);\n        var coordB = this._imageToViewportDelta(rect.width, rect.height, current);\n\n        return new $.Rect(\n            coordA.x,\n            coordA.y,\n            coordB.x,\n            coordB.y,\n            rect.degrees + this.getRotation(current)\n        );\n    },\n\n    /**\n     * Translates from a rectangle which describes a portion of\n     * the viewport in point coordinates to image rectangle coordinates.\n     * This method can be called either by passing X,Y,width,height or an {@link OpenSeadragon.Rect}.\n     * @param {Number|OpenSeadragon.Rect} viewerX - The left coordinate or rectangle in viewport coordinate system.\n     * @param {Number} [viewerY] - The top coordinate in viewport coordinate system.\n     * @param {Number} [pointWidth] - The width in viewport coordinate system.\n     * @param {Number} [pointHeight] - The height in viewport coordinate system.\n     * @param {Boolean} [current=false] - Pass true to use the current location; false for target location.\n     * @return {OpenSeadragon.Rect} A rect representing the coordinates in the image.\n     */\n    viewportToImageRectangle: function( viewerX, viewerY, pointWidth, pointHeight, current ) {\n        var rect = viewerX;\n        if (viewerX instanceof $.Rect) {\n            //they passed a rect instead of individual components\n            current = viewerY;\n        } else {\n            rect = new $.Rect(viewerX, viewerY, pointWidth, pointHeight);\n        }\n\n        var coordA = this.viewportToImageCoordinates(rect.getTopLeft(), current);\n        var coordB = this._viewportToImageDelta(rect.width, rect.height, current);\n\n        return new $.Rect(\n            coordA.x,\n            coordA.y,\n            coordB.x,\n            coordB.y,\n            rect.degrees - this.getRotation(current)\n        );\n    },\n\n    /**\n     * Convert pixel coordinates relative to the viewer element to image\n     * coordinates.\n     * @param {OpenSeadragon.Point} pixel\n     * @returns {OpenSeadragon.Point}\n     */\n    viewerElementToImageCoordinates: function( pixel ) {\n        var point = this.viewport.pointFromPixel( pixel, true );\n        return this.viewportToImageCoordinates( point );\n    },\n\n    /**\n     * Convert pixel coordinates relative to the image to\n     * viewer element coordinates.\n     * @param {OpenSeadragon.Point} pixel\n     * @returns {OpenSeadragon.Point}\n     */\n    imageToViewerElementCoordinates: function( pixel ) {\n        var point = this.imageToViewportCoordinates( pixel );\n        return this.viewport.pixelFromPoint( point, true );\n    },\n\n    /**\n     * Convert pixel coordinates relative to the window to image coordinates.\n     * @param {OpenSeadragon.Point} pixel\n     * @returns {OpenSeadragon.Point}\n     */\n    windowToImageCoordinates: function( pixel ) {\n        var viewerCoordinates = pixel.minus(\n            OpenSeadragon.getElementPosition( this.viewer.element ));\n        return this.viewerElementToImageCoordinates( viewerCoordinates );\n    },\n\n    /**\n     * Convert image coordinates to pixel coordinates relative to the window.\n     * @param {OpenSeadragon.Point} pixel\n     * @returns {OpenSeadragon.Point}\n     */\n    imageToWindowCoordinates: function( pixel ) {\n        var viewerCoordinates = this.imageToViewerElementCoordinates( pixel );\n        return viewerCoordinates.plus(\n            OpenSeadragon.getElementPosition( this.viewer.element ));\n    },\n\n    // private\n    // Convert rectangle in viewport coordinates to this tiled image point\n    // coordinates (x in [0, 1] and y in [0, aspectRatio])\n    _viewportToTiledImageRectangle: function(rect) {\n        var scale = this._scaleSpring.current.value;\n        rect = rect.rotate(-this.getRotation(true), this._getRotationPoint(true));\n        return new $.Rect(\n            (rect.x - this._xSpring.current.value) / scale,\n            (rect.y - this._ySpring.current.value) / scale,\n            rect.width / scale,\n            rect.height / scale,\n            rect.degrees);\n    },\n\n    /**\n     * Convert a viewport zoom to an image zoom.\n     * Image zoom: ratio of the original image size to displayed image size.\n     * 1 means original image size, 0.5 half size...\n     * Viewport zoom: ratio of the displayed image's width to viewport's width.\n     * 1 means identical width, 2 means image's width is twice the viewport's width...\n     * @function\n     * @param {Number} viewportZoom The viewport zoom\n     * @returns {Number} imageZoom The image zoom\n     */\n    viewportToImageZoom: function( viewportZoom ) {\n        var ratio = this._scaleSpring.current.value *\n            this.viewport._containerInnerSize.x / this.source.dimensions.x;\n        return ratio * viewportZoom;\n    },\n\n    /**\n     * Convert an image zoom to a viewport zoom.\n     * Image zoom: ratio of the original image size to displayed image size.\n     * 1 means original image size, 0.5 half size...\n     * Viewport zoom: ratio of the displayed image's width to viewport's width.\n     * 1 means identical width, 2 means image's width is twice the viewport's width...\n     * Note: not accurate with multi-image.\n     * @function\n     * @param {Number} imageZoom The image zoom\n     * @returns {Number} viewportZoom The viewport zoom\n     */\n    imageToViewportZoom: function( imageZoom ) {\n        var ratio = this._scaleSpring.current.value *\n            this.viewport._containerInnerSize.x / this.source.dimensions.x;\n        return imageZoom / ratio;\n    },\n\n    /**\n     * Sets the TiledImage's position in the world.\n     * @param {OpenSeadragon.Point} position - The new position, in viewport coordinates.\n     * @param {Boolean} [immediately=false] - Whether to animate to the new position or snap immediately.\n     * @fires OpenSeadragon.TiledImage.event:bounds-change\n     */\n    setPosition: function(position, immediately) {\n        var sameTarget = (this._xSpring.target.value === position.x &&\n            this._ySpring.target.value === position.y);\n\n        if (immediately) {\n            if (sameTarget && this._xSpring.current.value === position.x &&\n                this._ySpring.current.value === position.y) {\n                return;\n            }\n\n            this._xSpring.resetTo(position.x);\n            this._ySpring.resetTo(position.y);\n            this._needsDraw = true;\n        } else {\n            if (sameTarget) {\n                return;\n            }\n\n            this._xSpring.springTo(position.x);\n            this._ySpring.springTo(position.y);\n            this._needsDraw = true;\n        }\n\n        if (!sameTarget) {\n            this._raiseBoundsChange();\n        }\n    },\n\n    /**\n     * Sets the TiledImage's width in the world, adjusting the height to match based on aspect ratio.\n     * @param {Number} width - The new width, in viewport coordinates.\n     * @param {Boolean} [immediately=false] - Whether to animate to the new size or snap immediately.\n     * @fires OpenSeadragon.TiledImage.event:bounds-change\n     */\n    setWidth: function(width, immediately) {\n        this._setScale(width, immediately);\n    },\n\n    /**\n     * Sets the TiledImage's height in the world, adjusting the width to match based on aspect ratio.\n     * @param {Number} height - The new height, in viewport coordinates.\n     * @param {Boolean} [immediately=false] - Whether to animate to the new size or snap immediately.\n     * @fires OpenSeadragon.TiledImage.event:bounds-change\n     */\n    setHeight: function(height, immediately) {\n        this._setScale(height / this.normHeight, immediately);\n    },\n\n    /**\n     * Sets an array of polygons to crop the TiledImage during draw tiles.\n     * The render function will use the default non-zero winding rule.\n     * @param {OpenSeadragon.Point[][]} polygons - represented in an array of point object in image coordinates.\n     * Example format: [\n     *  [{x: 197, y:172}, {x: 226, y:172}, {x: 226, y:198}, {x: 197, y:198}], // First polygon\n     *  [{x: 328, y:200}, {x: 330, y:199}, {x: 332, y:201}, {x: 329, y:202}]  // Second polygon\n     *  [{x: 321, y:201}, {x: 356, y:205}, {x: 341, y:250}] // Third polygon\n     * ]\n     */\n    setCroppingPolygons: function( polygons ) {\n\n        var isXYObject = function(obj) {\n            return obj instanceof $.Point || (typeof obj.x === 'number' && typeof obj.y === 'number');\n        };\n\n        var objectToSimpleXYObject = function(objs) {\n            return objs.map(function(obj) {\n                try {\n                    if (isXYObject(obj)) {\n                        return { x: obj.x, y: obj.y };\n                    } else {\n                        throw new Error();\n                    }\n                } catch(e) {\n                    throw new Error('A Provided cropping polygon point is not supported');\n                }\n            });\n        };\n\n        try {\n            if (!$.isArray(polygons)) {\n                throw new Error('Provided cropping polygon is not an array');\n            }\n            this._croppingPolygons = polygons.map(function(polygon){\n                return objectToSimpleXYObject(polygon);\n            });\n        } catch (e) {\n            $.console.error('[TiledImage.setCroppingPolygons] Cropping polygon format not supported');\n            $.console.error(e);\n            this._croppingPolygons = null;\n        }\n    },\n\n    /**\n     * Resets the cropping polygons, thus next render will remove all cropping\n     * polygon effects.\n     */\n    resetCroppingPolygons: function() {\n        this._croppingPolygons = null;\n    },\n\n    /**\n     * Positions and scales the TiledImage to fit in the specified bounds.\n     * Note: this method fires OpenSeadragon.TiledImage.event:bounds-change\n     * twice\n     * @param {OpenSeadragon.Rect} bounds The bounds to fit the image into.\n     * @param {OpenSeadragon.Placement} [anchor=OpenSeadragon.Placement.CENTER]\n     * How to anchor the image in the bounds.\n     * @param {Boolean} [immediately=false] Whether to animate to the new size\n     * or snap immediately.\n     * @fires OpenSeadragon.TiledImage.event:bounds-change\n     */\n    fitBounds: function(bounds, anchor, immediately) {\n        anchor = anchor || $.Placement.CENTER;\n        var anchorProperties = $.Placement.properties[anchor];\n        var aspectRatio = this.contentAspectX;\n        var xOffset = 0;\n        var yOffset = 0;\n        var displayedWidthRatio = 1;\n        var displayedHeightRatio = 1;\n        if (this._clip) {\n            aspectRatio = this._clip.getAspectRatio();\n            displayedWidthRatio = this._clip.width / this.source.dimensions.x;\n            displayedHeightRatio = this._clip.height / this.source.dimensions.y;\n            if (bounds.getAspectRatio() > aspectRatio) {\n                xOffset = this._clip.x / this._clip.height * bounds.height;\n                yOffset = this._clip.y / this._clip.height * bounds.height;\n            } else {\n                xOffset = this._clip.x / this._clip.width * bounds.width;\n                yOffset = this._clip.y / this._clip.width * bounds.width;\n            }\n        }\n\n        if (bounds.getAspectRatio() > aspectRatio) {\n            // We will have margins on the X axis\n            var height = bounds.height / displayedHeightRatio;\n            var marginLeft = 0;\n            if (anchorProperties.isHorizontallyCentered) {\n                marginLeft = (bounds.width - bounds.height * aspectRatio) / 2;\n            } else if (anchorProperties.isRight) {\n                marginLeft = bounds.width - bounds.height * aspectRatio;\n            }\n            this.setPosition(\n                new $.Point(bounds.x - xOffset + marginLeft, bounds.y - yOffset),\n                immediately);\n            this.setHeight(height, immediately);\n        } else {\n            // We will have margins on the Y axis\n            var width = bounds.width / displayedWidthRatio;\n            var marginTop = 0;\n            if (anchorProperties.isVerticallyCentered) {\n                marginTop = (bounds.height - bounds.width / aspectRatio) / 2;\n            } else if (anchorProperties.isBottom) {\n                marginTop = bounds.height - bounds.width / aspectRatio;\n            }\n            this.setPosition(\n                new $.Point(bounds.x - xOffset, bounds.y - yOffset + marginTop),\n                immediately);\n            this.setWidth(width, immediately);\n        }\n    },\n\n    /**\n     * @returns {OpenSeadragon.Rect|null} The TiledImage's current clip rectangle,\n     * in image pixels, or null if none.\n     */\n    getClip: function() {\n        if (this._clip) {\n            return this._clip.clone();\n        }\n\n        return null;\n    },\n\n    /**\n     * @param {OpenSeadragon.Rect|null} newClip - An area, in image pixels, to clip to\n     * (portions of the image outside of this area will not be visible). Only works on\n     * browsers that support the HTML5 canvas.\n     * @fires OpenSeadragon.TiledImage.event:clip-change\n     */\n    setClip: function(newClip) {\n        $.console.assert(!newClip || newClip instanceof $.Rect,\n            \"[TiledImage.setClip] newClip must be an OpenSeadragon.Rect or null\");\n\n        if (newClip instanceof $.Rect) {\n            this._clip = newClip.clone();\n        } else {\n            this._clip = null;\n        }\n\n        this._needsDraw = true;\n        /**\n         * Raised when the TiledImage's clip is changed.\n         * @event clip-change\n         * @memberOf OpenSeadragon.TiledImage\n         * @type {object}\n         * @property {OpenSeadragon.TiledImage} eventSource - A reference to the\n         * TiledImage which raised the event.\n         * @property {?Object} userData - Arbitrary subscriber-defined object.\n         */\n        this.raiseEvent('clip-change');\n    },\n\n    /**\n     * @returns {Boolean} Whether the TiledImage should be flipped before rendering.\n     */\n    getFlip: function() {\n        return !!this.flipped;\n    },\n\n    /**\n     * @param {Boolean} flip Whether the TiledImage should be flipped before rendering.\n     * @fires OpenSeadragon.TiledImage.event:bounds-change\n     */\n    setFlip: function(flip) {\n        this.flipped = !!flip;\n        this._needsDraw = true;\n        this._raiseBoundsChange();\n    },\n\n    /**\n     * @returns {Number} The TiledImage's current opacity.\n     */\n    getOpacity: function() {\n        return this.opacity;\n    },\n\n    /**\n     * @param {Number} opacity Opacity the tiled image should be drawn at.\n     * @fires OpenSeadragon.TiledImage.event:opacity-change\n     */\n    setOpacity: function(opacity) {\n        if (opacity === this.opacity) {\n            return;\n        }\n\n        this.opacity = opacity;\n        this._needsDraw = true;\n        /**\n         * Raised when the TiledImage's opacity is changed.\n         * @event opacity-change\n         * @memberOf OpenSeadragon.TiledImage\n         * @type {object}\n         * @property {Number} opacity - The new opacity value.\n         * @property {OpenSeadragon.TiledImage} eventSource - A reference to the\n         * TiledImage which raised the event.\n         * @property {?Object} userData - Arbitrary subscriber-defined object.\n         */\n        this.raiseEvent('opacity-change', {\n            opacity: this.opacity\n        });\n    },\n\n    /**\n     * @returns {Boolean} whether the tiledImage can load its tiles even when it has zero opacity.\n     */\n    getPreload: function() {\n        return this._preload;\n    },\n\n    /**\n     * Set true to load even when hidden. Set false to block loading when hidden.\n     */\n    setPreload: function(preload) {\n        this._preload = !!preload;\n        this._needsDraw = true;\n    },\n\n    /**\n     * Get the rotation of this tiled image in degrees.\n     * @param {Boolean} [current=false] True for current rotation, false for target.\n     * @returns {Number} the rotation of this tiled image in degrees.\n     */\n    getRotation: function(current) {\n        return current ?\n            this._degreesSpring.current.value :\n            this._degreesSpring.target.value;\n    },\n\n    /**\n     * Set the current rotation of this tiled image in degrees.\n     * @param {Number} degrees the rotation in degrees.\n     * @param {Boolean} [immediately=false] Whether to animate to the new angle\n     * or rotate immediately.\n     * @fires OpenSeadragon.TiledImage.event:bounds-change\n     */\n    setRotation: function(degrees, immediately) {\n        if (this._degreesSpring.target.value === degrees &&\n            this._degreesSpring.isAtTargetValue()) {\n            return;\n        }\n        if (immediately) {\n            this._degreesSpring.resetTo(degrees);\n        } else {\n            this._degreesSpring.springTo(degrees);\n        }\n        this._needsDraw = true;\n        this._raiseBoundsChange();\n    },\n\n    /**\n     * Get the point around which this tiled image is rotated\n     * @private\n     * @param {Boolean} current True for current rotation point, false for target.\n     * @returns {OpenSeadragon.Point}\n     */\n    _getRotationPoint: function(current) {\n        return this.getBoundsNoRotate(current).getCenter();\n    },\n\n    /**\n     * @returns {String} The TiledImage's current compositeOperation.\n     */\n    getCompositeOperation: function() {\n        return this.compositeOperation;\n    },\n\n    /**\n     * @param {String} compositeOperation the tiled image should be drawn with this globalCompositeOperation.\n     * @fires OpenSeadragon.TiledImage.event:composite-operation-change\n     */\n    setCompositeOperation: function(compositeOperation) {\n        if (compositeOperation === this.compositeOperation) {\n            return;\n        }\n\n        this.compositeOperation = compositeOperation;\n        this._needsDraw = true;\n        /**\n         * Raised when the TiledImage's opacity is changed.\n         * @event composite-operation-change\n         * @memberOf OpenSeadragon.TiledImage\n         * @type {object}\n         * @property {String} compositeOperation - The new compositeOperation value.\n         * @property {OpenSeadragon.TiledImage} eventSource - A reference to the\n         * TiledImage which raised the event.\n         * @property {?Object} userData - Arbitrary subscriber-defined object.\n         */\n        this.raiseEvent('composite-operation-change', {\n            compositeOperation: this.compositeOperation\n        });\n    },\n\n    // private\n    _setScale: function(scale, immediately) {\n        var sameTarget = (this._scaleSpring.target.value === scale);\n        if (immediately) {\n            if (sameTarget && this._scaleSpring.current.value === scale) {\n                return;\n            }\n\n            this._scaleSpring.resetTo(scale);\n            this._updateForScale();\n            this._needsDraw = true;\n        } else {\n            if (sameTarget) {\n                return;\n            }\n\n            this._scaleSpring.springTo(scale);\n            this._updateForScale();\n            this._needsDraw = true;\n        }\n\n        if (!sameTarget) {\n            this._raiseBoundsChange();\n        }\n    },\n\n    // private\n    _updateForScale: function() {\n        this._worldWidthTarget = this._scaleSpring.target.value;\n        this._worldHeightTarget = this.normHeight * this._scaleSpring.target.value;\n        this._worldWidthCurrent = this._scaleSpring.current.value;\n        this._worldHeightCurrent = this.normHeight * this._scaleSpring.current.value;\n    },\n\n    // private\n    _raiseBoundsChange: function() {\n        /**\n         * Raised when the TiledImage's bounds are changed.\n         * Note that this event is triggered only when the animation target is changed;\n         * not for every frame of animation.\n         * @event bounds-change\n         * @memberOf OpenSeadragon.TiledImage\n         * @type {object}\n         * @property {OpenSeadragon.TiledImage} eventSource - A reference to the\n         * TiledImage which raised the event.\n         * @property {?Object} userData - Arbitrary subscriber-defined object.\n         */\n        this.raiseEvent('bounds-change');\n    },\n\n    // private\n    _isBottomItem: function() {\n        return this.viewer.world.getItemAt(0) === this;\n    },\n\n    // private\n    _getLevelsInterval: function() {\n        var lowestLevel = Math.max(\n            this.source.minLevel,\n            Math.floor(Math.log(this.minZoomImageRatio) / Math.log(2))\n        );\n        var currentZeroRatio = this.viewport.deltaPixelsFromPointsNoRotate(\n            this.source.getPixelRatio(0), true).x *\n            this._scaleSpring.current.value;\n        var highestLevel = Math.min(\n            Math.abs(this.source.maxLevel),\n            Math.abs(Math.floor(\n                Math.log(currentZeroRatio / this.minPixelRatio) / Math.log(2)\n            ))\n        );\n\n        // Calculations for the interval of levels to draw\n        // can return invalid intervals; fix that here if necessary\n        highestLevel = Math.max(highestLevel, this.source.minLevel || 0);\n        lowestLevel = Math.min(lowestLevel, highestLevel);\n        return {\n            lowestLevel: lowestLevel,\n            highestLevel: highestLevel\n        };\n    },\n\n    /**\n     * @private\n     * @inner\n     * Pretty much every other line in this needs to be documented so it's clear\n     * how each piece of this routine contributes to the drawing process.  That's\n     * why there are so many TODO's inside this function.\n     */\n    _updateViewport: function() {\n        this._needsDraw = false;\n        this._tilesLoading = 0;\n        this.loadingCoverage = {};\n\n        // Reset tile's internal drawn state\n        while (this.lastDrawn.length > 0) {\n            var tile = this.lastDrawn.pop();\n            tile.beingDrawn = false;\n        }\n\n        var viewport = this.viewport;\n        var drawArea = this._viewportToTiledImageRectangle(\n            viewport.getBoundsWithMargins(true));\n\n        if (!this.wrapHorizontal && !this.wrapVertical) {\n            var tiledImageBounds = this._viewportToTiledImageRectangle(\n                this.getClippedBounds(true));\n            drawArea = drawArea.intersection(tiledImageBounds);\n            if (drawArea === null) {\n                return;\n            }\n        }\n\n        var levelsInterval = this._getLevelsInterval();\n        var lowestLevel = levelsInterval.lowestLevel;\n        var highestLevel = levelsInterval.highestLevel;\n        var bestTile = null;\n        var haveDrawn = false;\n        var currentTime = $.now();\n\n        // Update any level that will be drawn\n        for (var level = highestLevel; level >= lowestLevel; level--) {\n            var drawLevel = false;\n\n            //Avoid calculations for draw if we have already drawn this\n            var currentRenderPixelRatio = viewport.deltaPixelsFromPointsNoRotate(\n                this.source.getPixelRatio(level),\n                true\n            ).x * this._scaleSpring.current.value;\n\n            if (level === lowestLevel ||\n                (!haveDrawn && currentRenderPixelRatio >= this.minPixelRatio)) {\n                drawLevel = true;\n                haveDrawn = true;\n            } else if (!haveDrawn) {\n                continue;\n            }\n\n            //Perform calculations for draw if we haven't drawn this\n            var targetRenderPixelRatio = viewport.deltaPixelsFromPointsNoRotate(\n                this.source.getPixelRatio(level),\n                false\n            ).x * this._scaleSpring.current.value;\n\n            var targetZeroRatio = viewport.deltaPixelsFromPointsNoRotate(\n                this.source.getPixelRatio(\n                    Math.max(\n                        this.source.getClosestLevel(),\n                        0\n                    )\n                ),\n                false\n            ).x * this._scaleSpring.current.value;\n\n            var optimalRatio = this.immediateRender ? 1 : targetZeroRatio;\n            var levelOpacity = Math.min(1, (currentRenderPixelRatio - 0.5) / 0.5);\n            var levelVisibility = optimalRatio / Math.abs(\n                optimalRatio - targetRenderPixelRatio\n            );\n\n            // Update the level and keep track of 'best' tile to load\n            bestTile = this._updateLevel(\n                haveDrawn,\n                drawLevel,\n                level,\n                levelOpacity,\n                levelVisibility,\n                drawArea,\n                currentTime,\n                bestTile\n            );\n\n            // Stop the loop if lower-res tiles would all be covered by\n            // already drawn tiles\n            if (this._providesCoverage(this.coverage, level)) {\n                break;\n            }\n        }\n\n        // Perform the actual drawing\n        this._drawTiles(this.lastDrawn);\n\n        // Load the new 'best' tile\n        if (bestTile && !bestTile.context2D) {\n            this._loadTile(bestTile, currentTime);\n            this._needsDraw = true;\n            this._setFullyLoaded(false);\n        } else {\n            this._setFullyLoaded(this._tilesLoading === 0);\n        }\n    },\n\n    // private\n    _getCornerTiles: function(level, topLeftBound, bottomRightBound) {\n        var leftX;\n        var rightX;\n        if (this.wrapHorizontal) {\n            leftX = $.positiveModulo(topLeftBound.x, 1);\n            rightX = $.positiveModulo(bottomRightBound.x, 1);\n        } else {\n            leftX = Math.max(0, topLeftBound.x);\n            rightX = Math.min(1, bottomRightBound.x);\n        }\n        var topY;\n        var bottomY;\n        var aspectRatio = 1 / this.source.aspectRatio;\n        if (this.wrapVertical) {\n            topY = $.positiveModulo(topLeftBound.y, aspectRatio);\n            bottomY = $.positiveModulo(bottomRightBound.y, aspectRatio);\n        } else {\n            topY = Math.max(0, topLeftBound.y);\n            bottomY = Math.min(aspectRatio, bottomRightBound.y);\n        }\n\n        var topLeftTile = this.source.getTileAtPoint(level, new $.Point(leftX, topY));\n        var bottomRightTile = this.source.getTileAtPoint(level, new $.Point(rightX, bottomY));\n        var numTiles  = this.source.getNumTiles(level);\n\n        if (this.wrapHorizontal) {\n            topLeftTile.x += numTiles.x * Math.floor(topLeftBound.x);\n            bottomRightTile.x += numTiles.x * Math.floor(bottomRightBound.x);\n        }\n        if (this.wrapVertical) {\n            topLeftTile.y += numTiles.y * Math.floor(topLeftBound.y / aspectRatio);\n            bottomRightTile.y += numTiles.y * Math.floor(bottomRightBound.y / aspectRatio);\n        }\n\n        return {\n            topLeft: topLeftTile,\n            bottomRight: bottomRightTile,\n        };\n    },\n\n    /**\n     * Updates all tiles at a given resolution level.\n     * @private\n     * @param {Boolean} haveDrawn\n     * @param {Boolean} drawLevel\n     * @param {Number} level\n     * @param {Number} levelOpacity\n     * @param {Number} levelVisibility\n     * @param {OpenSeadragon.Rect} drawArea\n     * @param {Number} currentTime\n     * @param {OpenSeadragon.Tile} best - The current \"best\" tile to draw.\n     */\n    _updateLevel: function(haveDrawn, drawLevel, level, levelOpacity,\n                           levelVisibility, drawArea, currentTime, best) {\n\n        var topLeftBound = drawArea.getBoundingBox().getTopLeft();\n        var bottomRightBound = drawArea.getBoundingBox().getBottomRight();\n\n        if (this.viewer) {\n            /**\n             * <em>- Needs documentation -</em>\n             *\n             * @event update-level\n             * @memberof OpenSeadragon.Viewer\n             * @type {object}\n             * @property {OpenSeadragon.Viewer} eventSource - A reference to the Viewer which raised the event.\n             * @property {OpenSeadragon.TiledImage} tiledImage - Which TiledImage is being drawn.\n             * @property {Object} havedrawn\n             * @property {Object} level\n             * @property {Object} opacity\n             * @property {Object} visibility\n             * @property {OpenSeadragon.Rect} drawArea\n             * @property {Object} topleft deprecated, use drawArea instead\n             * @property {Object} bottomright deprecated, use drawArea instead\n             * @property {Object} currenttime\n             * @property {Object} best\n             * @property {?Object} userData - Arbitrary subscriber-defined object.\n             */\n            this.viewer.raiseEvent('update-level', {\n                tiledImage: this,\n                havedrawn: haveDrawn,\n                level: level,\n                opacity: levelOpacity,\n                visibility: levelVisibility,\n                drawArea: drawArea,\n                topleft: topLeftBound,\n                bottomright: bottomRightBound,\n                currenttime: currentTime,\n                best: best\n            });\n        }\n\n        this._resetCoverage(this.coverage, level);\n        this._resetCoverage(this.loadingCoverage, level);\n\n        //OK, a new drawing so do your calculations\n        var cornerTiles = this._getCornerTiles(level, topLeftBound, bottomRightBound);\n        var topLeftTile = cornerTiles.topLeft;\n        var bottomRightTile = cornerTiles.bottomRight;\n        var numberOfTiles  = this.source.getNumTiles(level);\n\n        var viewportCenter = this.viewport.pixelFromPoint(this.viewport.getCenter());\n\n        if (this.getFlip()) {\n            // The right-most tile can be narrower than the others. When flipped,\n            // this tile is now on the left. Because it is narrower than the normal\n            // left-most tile, the subsequent tiles may not be wide enough to completely\n            // fill the viewport. Fix this by rendering an extra column of tiles. If we\n            // are not wrapping, make sure we never render more than the number of tiles\n            // in the image.\n            bottomRightTile.x += 1;\n            if (!this.wrapHorizontal) {\n                bottomRightTile.x  = Math.min(bottomRightTile.x, numberOfTiles.x - 1);\n            }\n        }\n\n        for (var x = topLeftTile.x; x <= bottomRightTile.x; x++) {\n            for (var y = topLeftTile.y; y <= bottomRightTile.y; y++) {\n\n                var flippedX;\n                if (this.getFlip()) {\n                    var xMod = ( numberOfTiles.x + ( x % numberOfTiles.x ) ) % numberOfTiles.x;\n                    flippedX = x + numberOfTiles.x - xMod - xMod - 1;\n                } else {\n                    flippedX = x;\n                }\n\n                if (drawArea.intersection(this.getTileBounds(level, flippedX, y)) === null) {\n                    // This tile is outside of the viewport, no need to draw it\n                    continue;\n                }\n\n                best = this._updateTile(\n                    drawLevel,\n                    haveDrawn,\n                    flippedX, y,\n                    level,\n                    levelOpacity,\n                    levelVisibility,\n                    viewportCenter,\n                    numberOfTiles,\n                    currentTime,\n                    best\n                );\n            }\n        }\n\n        return best;\n    },\n\n    /**\n     * @private\n     * @inner\n     * Update a single tile at a particular resolution level.\n     * @param {Boolean} haveDrawn\n     * @param {Boolean} drawLevel\n     * @param {Number} x\n     * @param {Number} y\n     * @param {Number} level\n     * @param {Number} levelOpacity\n     * @param {Number} levelVisibility\n     * @param {OpenSeadragon.Point} viewportCenter\n     * @param {Number} numberOfTiles\n     * @param {Number} currentTime\n     * @param {OpenSeadragon.Tile} best - The current \"best\" tile to draw.\n     */\n    _updateTile: function( haveDrawn, drawLevel, x, y, level, levelOpacity,\n                           levelVisibility, viewportCenter, numberOfTiles, currentTime, best){\n\n        var tile = this._getTile(\n            x, y,\n            level,\n            currentTime,\n            numberOfTiles,\n            this._worldWidthCurrent,\n            this._worldHeightCurrent\n            ),\n            drawTile = drawLevel;\n\n        if( this.viewer ){\n            /**\n             * <em>- Needs documentation -</em>\n             *\n             * @event update-tile\n             * @memberof OpenSeadragon.Viewer\n             * @type {object}\n             * @property {OpenSeadragon.Viewer} eventSource - A reference to the Viewer which raised the event.\n             * @property {OpenSeadragon.TiledImage} tiledImage - Which TiledImage is being drawn.\n             * @property {OpenSeadragon.Tile} tile\n             * @property {?Object} userData - Arbitrary subscriber-defined object.\n             */\n            this.viewer.raiseEvent( 'update-tile', {\n                tiledImage: this,\n                tile: tile\n            });\n        }\n\n        this._setCoverage( this.coverage, level, x, y, false );\n\n        var loadingCoverage = tile.loaded || tile.loading || this._isCovered(this.loadingCoverage, level, x, y);\n        this._setCoverage(this.loadingCoverage, level, x, y, loadingCoverage);\n\n        if ( !tile.exists ) {\n            return best;\n        }\n\n        if ( haveDrawn && !drawTile ) {\n            if ( this._isCovered( this.coverage, level, x, y ) ) {\n                this._setCoverage( this.coverage, level, x, y, true );\n            } else {\n                drawTile = true;\n            }\n        }\n\n        if ( !drawTile ) {\n            return best;\n        }\n\n        this._positionTile(\n            tile,\n            this.source.tileOverlap,\n            this.viewport,\n            viewportCenter,\n            levelVisibility\n        );\n\n        if (!tile.loaded) {\n            if (tile.context2D) {\n                this._setTileLoaded(tile);\n            } else {\n                var imageRecord = this._tileCache.getImageRecord(tile.cacheKey);\n                if (imageRecord) {\n                    var image = imageRecord.getImage();\n                    this._setTileLoaded(tile, image);\n                }\n            }\n        }\n\n        if ( tile.loaded ) {\n            var needsDraw = this._blendTile(\n                tile,\n                x, y,\n                level,\n                levelOpacity,\n                currentTime\n            );\n\n            if ( needsDraw ) {\n                this._needsDraw = true;\n            }\n        } else if ( tile.loading ) {\n            // the tile is already in the download queue\n            this._tilesLoading++;\n        } else if (!loadingCoverage) {\n            best = this._compareTiles( best, tile );\n        }\n\n        return best;\n    },\n\n    /**\n     * @private\n     * @inner\n     * Obtains a tile at the given location.\n     * @param {Number} x\n     * @param {Number} y\n     * @param {Number} level\n     * @param {Number} time\n     * @param {Number} numTiles\n     * @param {Number} worldWidth\n     * @param {Number} worldHeight\n     * @returns {OpenSeadragon.Tile}\n     */\n    _getTile: function(\n        x, y,\n        level,\n        time,\n        numTiles,\n        worldWidth,\n        worldHeight\n    ) {\n        var xMod,\n            yMod,\n            bounds,\n            sourceBounds,\n            exists,\n            url,\n            post,\n            ajaxHeaders,\n            context2D,\n            tile,\n            tilesMatrix = this.tilesMatrix,\n            tileSource = this.source;\n\n        if ( !tilesMatrix[ level ] ) {\n            tilesMatrix[ level ] = {};\n        }\n        if ( !tilesMatrix[ level ][ x ] ) {\n            tilesMatrix[ level ][ x ] = {};\n        }\n\n        if ( !tilesMatrix[ level ][ x ][ y ] || !tilesMatrix[ level ][ x ][ y ].flipped !== !this.flipped ) {\n            xMod    = ( numTiles.x + ( x % numTiles.x ) ) % numTiles.x;\n            yMod    = ( numTiles.y + ( y % numTiles.y ) ) % numTiles.y;\n            bounds  = this.getTileBounds( level, x, y );\n            sourceBounds = tileSource.getTileBounds( level, xMod, yMod, true );\n            exists  = tileSource.tileExists( level, xMod, yMod );\n            url     = tileSource.getTileUrl( level, xMod, yMod );\n            post    = tileSource.getTilePostData( level, xMod, yMod );\n\n            // Headers are only applicable if loadTilesWithAjax is set\n            if (this.loadTilesWithAjax) {\n                ajaxHeaders = tileSource.getTileAjaxHeaders( level, xMod, yMod );\n                // Combine tile AJAX headers with tiled image AJAX headers (if applicable)\n                if ($.isPlainObject(this.ajaxHeaders)) {\n                    ajaxHeaders = $.extend({}, this.ajaxHeaders, ajaxHeaders);\n                }\n            } else {\n                ajaxHeaders = null;\n            }\n\n            context2D = tileSource.getContext2D ?\n                tileSource.getContext2D(level, xMod, yMod) : undefined;\n\n            tile = new $.Tile(\n                level,\n                x,\n                y,\n                bounds,\n                exists,\n                url,\n                context2D,\n                this.loadTilesWithAjax,\n                ajaxHeaders,\n                sourceBounds,\n                post,\n                tileSource.getTileHashKey(level, xMod, yMod, url, ajaxHeaders, post)\n            );\n\n            if (this.getFlip()) {\n                if (xMod === 0) {\n                    tile.isRightMost = true;\n                }\n            } else {\n                if (xMod === numTiles.x - 1) {\n                    tile.isRightMost = true;\n                }\n            }\n\n            if (yMod === numTiles.y - 1) {\n                tile.isBottomMost = true;\n            }\n\n            tile.flipped = this.flipped;\n\n            tilesMatrix[ level ][ x ][ y ] = tile;\n        }\n\n        tile = tilesMatrix[ level ][ x ][ y ];\n        tile.lastTouchTime = time;\n\n        return tile;\n    },\n\n    /**\n     * @private\n     * @inner\n     * Dispatch a job to the ImageLoader to load the Image for a Tile.\n     * @param {OpenSeadragon.Tile} tile\n     * @param {Number} time\n     */\n    _loadTile: function(tile, time ) {\n        var _this = this;\n        tile.loading = true;\n        this._imageLoader.addJob({\n            src: tile.url,\n            postData: tile.postData,\n            loadWithAjax: tile.loadWithAjax,\n            ajaxHeaders: tile.ajaxHeaders,\n            crossOriginPolicy: this.crossOriginPolicy,\n            ajaxWithCredentials: this.ajaxWithCredentials,\n            callback: function( image, errorMsg, tileRequest ){\n                _this._onTileLoad( tile, time, image, errorMsg, tileRequest );\n            },\n            abort: function() {\n                tile.loading = false;\n            }\n        });\n    },\n\n    /**\n     * @private\n     * @inner\n     * Callback fired when a Tile's Image finished downloading.\n     * @param {OpenSeadragon.Tile} tile\n     * @param {Number} time\n     * @param {Image} image\n     * @param {String} errorMsg\n     * @param {XMLHttpRequest} tileRequest\n     */\n    _onTileLoad: function( tile, time, image, errorMsg, tileRequest ) {\n        if ( !image ) {\n            $.console.error( \"Tile %s failed to load: %s - error: %s\", tile, tile.url, errorMsg );\n            /**\n             * Triggered when a tile fails to load.\n             *\n             * @event tile-load-failed\n             * @memberof OpenSeadragon.Viewer\n             * @type {object}\n             * @property {OpenSeadragon.Tile} tile - The tile that failed to load.\n             * @property {OpenSeadragon.TiledImage} tiledImage - The tiled image the tile belongs to.\n             * @property {number} time - The time in milliseconds when the tile load began.\n             * @property {string} message - The error message.\n             * @property {XMLHttpRequest} tileRequest - The XMLHttpRequest used to load the tile if available.\n             */\n            this.viewer.raiseEvent(\"tile-load-failed\", {\n                tile: tile,\n                tiledImage: this,\n                time: time,\n                message: errorMsg,\n                tileRequest: tileRequest\n            });\n            tile.loading = false;\n            tile.exists = false;\n            return;\n        }\n\n        if ( time < this.lastResetTime ) {\n            $.console.warn( \"Ignoring tile %s loaded before reset: %s\", tile, tile.url );\n            tile.loading = false;\n            return;\n        }\n\n        var _this = this,\n            finish = function() {\n                var ccc = _this.source;\n                var cutoff = ccc.getClosestLevel();\n                _this._setTileLoaded(tile, image, cutoff, tileRequest);\n        };\n\n        // Check if we're mid-update; this can happen on IE8 because image load events for\n        // cached images happen immediately there\n        if ( !this._midDraw ) {\n            finish();\n        } else {\n            // Wait until after the update, in case caching unloads any tiles\n            window.setTimeout( finish, 1);\n        }\n    },\n\n    /**\n     * @private\n     * @inner\n     * @param {OpenSeadragon.Tile} tile\n     * @param {Image|undefined} image\n     * @param {Number|undefined} cutoff\n     * @param {XMLHttpRequest|undefined} tileRequest\n     */\n    _setTileLoaded: function(tile, image, cutoff, tileRequest) {\n        var increment = 0,\n            _this = this;\n\n        function getCompletionCallback() {\n            increment++;\n            return completionCallback;\n        }\n\n        function completionCallback() {\n            increment--;\n            if (increment === 0) {\n                tile.loading = false;\n                tile.loaded = true;\n                if (!tile.context2D) {\n                    _this._tileCache.cacheTile({\n                        image: image,\n                        tile: tile,\n                        cutoff: cutoff,\n                        tiledImage: _this\n                    });\n                }\n                _this._needsDraw = true;\n            }\n        }\n\n        /**\n         * Triggered when a tile has just been loaded in memory. That means that the\n         * image has been downloaded and can be modified before being drawn to the canvas.\n         *\n         * @event tile-loaded\n         * @memberof OpenSeadragon.Viewer\n         * @type {object}\n         * @property {Image} image - The image of the tile.\n         * @property {OpenSeadragon.TiledImage} tiledImage - The tiled image of the loaded tile.\n         * @property {OpenSeadragon.Tile} tile - The tile which has been loaded.\n         * @property {XMLHttpRequest} tileRequest - The AJAX request that loaded this tile (if applicable).\n         * @property {function} getCompletionCallback - A function giving a callback to call\n         * when the asynchronous processing of the image is done. The image will be\n         * marked as entirely loaded when the callback has been called once for each\n         * call to getCompletionCallback.\n         */\n        this.viewer.raiseEvent(\"tile-loaded\", {\n            tile: tile,\n            tiledImage: this,\n            tileRequest: tileRequest,\n            image: image,\n            getCompletionCallback: getCompletionCallback\n        });\n        // In case the completion callback is never called, we at least force it once.\n        getCompletionCallback()();\n    },\n\n    /**\n     * @private\n     * @inner\n     * @param {OpenSeadragon.Tile} tile\n     * @param {Boolean} overlap\n     * @param {OpenSeadragon.Viewport} viewport\n     * @param {OpenSeadragon.Point} viewportCenter\n     * @param {Number} levelVisibility\n     */\n    _positionTile: function( tile, overlap, viewport, viewportCenter, levelVisibility ){\n        var boundsTL = tile.bounds.getTopLeft();\n\n        boundsTL.x *= this._scaleSpring.current.value;\n        boundsTL.y *= this._scaleSpring.current.value;\n        boundsTL.x += this._xSpring.current.value;\n        boundsTL.y += this._ySpring.current.value;\n\n        var boundsSize   = tile.bounds.getSize();\n\n        boundsSize.x *= this._scaleSpring.current.value;\n        boundsSize.y *= this._scaleSpring.current.value;\n\n        var positionC = viewport.pixelFromPointNoRotate(boundsTL, true),\n            positionT = viewport.pixelFromPointNoRotate(boundsTL, false),\n            sizeC = viewport.deltaPixelsFromPointsNoRotate(boundsSize, true),\n            sizeT = viewport.deltaPixelsFromPointsNoRotate(boundsSize, false),\n            tileCenter = positionT.plus( sizeT.divide( 2 ) ),\n            tileSquaredDistance = viewportCenter.squaredDistanceTo( tileCenter );\n\n        if ( !overlap ) {\n            sizeC = sizeC.plus( new $.Point( 1, 1 ) );\n        }\n\n        if (tile.isRightMost && this.wrapHorizontal) {\n            sizeC.x += 0.75; // Otherwise Firefox and Safari show seams\n        }\n\n        if (tile.isBottomMost && this.wrapVertical) {\n            sizeC.y += 0.75; // Otherwise Firefox and Safari show seams\n        }\n\n        tile.position   = positionC;\n        tile.size       = sizeC;\n        tile.squaredDistance   = tileSquaredDistance;\n        tile.visibility = levelVisibility;\n    },\n\n    /**\n     * @private\n     * @inner\n     * Updates the opacity of a tile according to the time it has been on screen\n     * to perform a fade-in.\n     * Updates coverage once a tile is fully opaque.\n     * Returns whether the fade-in has completed.\n     *\n     * @param {OpenSeadragon.Tile} tile\n     * @param {Number} x\n     * @param {Number} y\n     * @param {Number} level\n     * @param {Number} levelOpacity\n     * @param {Number} currentTime\n     * @returns {Boolean}\n     */\n    _blendTile: function( tile, x, y, level, levelOpacity, currentTime ){\n        var blendTimeMillis = 1000 * this.blendTime,\n            deltaTime,\n            opacity;\n\n        if ( !tile.blendStart ) {\n            tile.blendStart = currentTime;\n        }\n\n        deltaTime   = currentTime - tile.blendStart;\n        opacity     = blendTimeMillis ? Math.min( 1, deltaTime / ( blendTimeMillis ) ) : 1;\n\n        if ( this.alwaysBlend ) {\n            opacity *= levelOpacity;\n        }\n\n        tile.opacity = opacity;\n\n        this.lastDrawn.push( tile );\n\n        if ( opacity === 1 ) {\n            this._setCoverage( this.coverage, level, x, y, true );\n            this._hasOpaqueTile = true;\n        } else if ( deltaTime < blendTimeMillis ) {\n            return true;\n        }\n\n        return false;\n    },\n\n\n    /**\n     * @private\n     * @inner\n     * Determines whether the 'last best' tile for the area is better than the\n     * tile in question.\n     *\n     * @param {OpenSeadragon.Tile} previousBest\n     * @param {OpenSeadragon.Tile} tile\n     * @returns {OpenSeadragon.Tile} The new best tile.\n     */\n    _compareTiles: function( previousBest, tile ) {\n        if ( !previousBest ) {\n            return tile;\n        }\n\n        if ( tile.visibility > previousBest.visibility ) {\n            return tile;\n        } else if ( tile.visibility === previousBest.visibility ) {\n            if ( tile.squaredDistance < previousBest.squaredDistance ) {\n                return tile;\n            }\n        }\n        return previousBest;\n    },\n\n    /**\n     * @private\n     * @inner\n     * Draws a TiledImage.\n     * @param {OpenSeadragon.Tile[]} lastDrawn - An unordered list of Tiles drawn last frame.\n     */\n    _drawTiles: function( lastDrawn ) {\n        if (this.opacity === 0 || (lastDrawn.length === 0 && !this.placeholderFillStyle)) {\n            return;\n        }\n\n        var tile = lastDrawn[0];\n        var useSketch;\n\n        if (tile) {\n            useSketch = this.opacity < 1 ||\n                (this.compositeOperation && this.compositeOperation !== 'source-over') ||\n                (!this._isBottomItem() && tile._hasTransparencyChannel());\n        }\n\n        var sketchScale;\n        var sketchTranslate;\n\n        var zoom = this.viewport.getZoom(true);\n        var imageZoom = this.viewportToImageZoom(zoom);\n\n        if (lastDrawn.length > 1 &&\n            imageZoom > this.smoothTileEdgesMinZoom &&\n            !this.iOSDevice &&\n            this.getRotation(true) % 360 === 0 && // TODO: support tile edge smoothing with tiled image rotation.\n            $.supportsCanvas && this.viewer.useCanvas) {\n            // When zoomed in a lot (>100%) the tile edges are visible.\n            // So we have to composite them at ~100% and scale them up together.\n            // Note: Disabled on iOS devices per default as it causes a native crash\n            useSketch = true;\n            sketchScale = tile.getScaleForEdgeSmoothing();\n            sketchTranslate = tile.getTranslationForEdgeSmoothing(sketchScale,\n                this._drawer.getCanvasSize(false),\n                this._drawer.getCanvasSize(true));\n        }\n\n        var bounds;\n        if (useSketch) {\n            if (!sketchScale) {\n                // Except when edge smoothing, we only clean the part of the\n                // sketch canvas we are going to use for performance reasons.\n                bounds = this.viewport.viewportToViewerElementRectangle(\n                    this.getClippedBounds(true))\n                    .getIntegerBoundingBox();\n\n                if(this._drawer.viewer.viewport.getFlip()) {\n                    if (this.viewport.degrees !== 0 || this.getRotation(true) % 360 !== 0) {\n                        bounds.x = this._drawer.viewer.container.clientWidth - (bounds.x + bounds.width);\n                    }\n                }\n\n                bounds = bounds.times($.pixelDensityRatio);\n            }\n            this._drawer._clear(true, bounds);\n        }\n\n        // When scaling, we must rotate only when blending the sketch canvas to\n        // avoid interpolation\n        if (!sketchScale) {\n            if (this.viewport.degrees !== 0) {\n                this._drawer._offsetForRotation({\n                    degrees: this.viewport.degrees,\n                    useSketch: useSketch\n                });\n            }\n            if (this.getRotation(true) % 360 !== 0) {\n                this._drawer._offsetForRotation({\n                    degrees: this.getRotation(true),\n                    point: this.viewport.pixelFromPointNoRotate(\n                        this._getRotationPoint(true), true),\n                    useSketch: useSketch\n                });\n            }\n\n            if (this.viewport.degrees === 0 && this.getRotation(true) % 360 === 0){\n                if(this._drawer.viewer.viewport.getFlip()) {\n                    this._drawer._flip();\n                }\n            }\n        }\n\n        var usedClip = false;\n        if ( this._clip ) {\n            this._drawer.saveContext(useSketch);\n\n            var box = this.imageToViewportRectangle(this._clip, true);\n            box = box.rotate(-this.getRotation(true), this._getRotationPoint(true));\n            var clipRect = this._drawer.viewportToDrawerRectangle(box);\n            if (sketchScale) {\n                clipRect = clipRect.times(sketchScale);\n            }\n            if (sketchTranslate) {\n                clipRect = clipRect.translate(sketchTranslate);\n            }\n            this._drawer.setClip(clipRect, useSketch);\n\n            usedClip = true;\n        }\n\n        if (this._croppingPolygons) {\n            this._drawer.saveContext(useSketch);\n            try {\n                var polygons = this._croppingPolygons.map(function (polygon) {\n                    return polygon.map(function (coord) {\n                        var point = this\n                            .imageToViewportCoordinates(coord.x, coord.y, true)\n                            .rotate(-this.getRotation(true), this._getRotationPoint(true));\n                        var clipPoint = this._drawer.viewportCoordToDrawerCoord(point);\n                        if (sketchScale) {\n                            clipPoint = clipPoint.times(sketchScale);\n                        }\n                        return clipPoint;\n                    });\n                });\n                this._drawer.clipWithPolygons(polygons, useSketch);\n            } catch (e) {\n                $.console.error(e);\n            }\n            usedClip = true;\n        }\n\n        if ( this.placeholderFillStyle && this._hasOpaqueTile === false ) {\n            var placeholderRect = this._drawer.viewportToDrawerRectangle(this.getBounds(true));\n            if (sketchScale) {\n                placeholderRect = placeholderRect.times(sketchScale);\n            }\n            if (sketchTranslate) {\n                placeholderRect = placeholderRect.translate(sketchTranslate);\n            }\n\n            var fillStyle = null;\n            if ( typeof this.placeholderFillStyle === \"function\" ) {\n                fillStyle = this.placeholderFillStyle(this, this._drawer.context);\n            }\n            else {\n                fillStyle = this.placeholderFillStyle;\n            }\n\n            this._drawer.drawRectangle(placeholderRect, fillStyle, useSketch);\n        }\n\n        var subPixelRoundingRule = determineSubPixelRoundingRule(this.subPixelRoundingForTransparency);\n\n        var shouldRoundPositionAndSize = false;\n\n        if (subPixelRoundingRule === $.SUBPIXEL_ROUNDING_OCCURRENCES.ALWAYS) {\n            shouldRoundPositionAndSize = true;\n        } else if (subPixelRoundingRule === $.SUBPIXEL_ROUNDING_OCCURRENCES.ONLY_AT_REST) {\n            var isAnimating = this.viewer && this.viewer.isAnimating();\n            shouldRoundPositionAndSize = !isAnimating;\n        }\n\n        for (var i = lastDrawn.length - 1; i >= 0; i--) {\n            tile = lastDrawn[ i ];\n            this._drawer.drawTile( tile, this._drawingHandler, useSketch, sketchScale, sketchTranslate, shouldRoundPositionAndSize );\n            tile.beingDrawn = true;\n\n            if( this.viewer ){\n                /**\n                 * <em>- Needs documentation -</em>\n                 *\n                 * @event tile-drawn\n                 * @memberof OpenSeadragon.Viewer\n                 * @type {object}\n                 * @property {OpenSeadragon.Viewer} eventSource - A reference to the Viewer which raised the event.\n                 * @property {OpenSeadragon.TiledImage} tiledImage - Which TiledImage is being drawn.\n                 * @property {OpenSeadragon.Tile} tile\n                 * @property {?Object} userData - Arbitrary subscriber-defined object.\n                 */\n                this.viewer.raiseEvent( 'tile-drawn', {\n                    tiledImage: this,\n                    tile: tile\n                });\n            }\n        }\n\n        if ( usedClip ) {\n            this._drawer.restoreContext( useSketch );\n        }\n\n        if (!sketchScale) {\n            if (this.getRotation(true) % 360 !== 0) {\n                this._drawer._restoreRotationChanges(useSketch);\n            }\n            if (this.viewport.degrees !== 0) {\n                this._drawer._restoreRotationChanges(useSketch);\n            }\n        }\n\n        if (useSketch) {\n            if (sketchScale) {\n                if (this.viewport.degrees !== 0) {\n                    this._drawer._offsetForRotation({\n                        degrees: this.viewport.degrees,\n                        useSketch: false\n                    });\n                }\n                if (this.getRotation(true) % 360 !== 0) {\n                    this._drawer._offsetForRotation({\n                        degrees: this.getRotation(true),\n                        point: this.viewport.pixelFromPointNoRotate(\n                            this._getRotationPoint(true), true),\n                        useSketch: false\n                    });\n                }\n            }\n            this._drawer.blendSketch({\n                opacity: this.opacity,\n                scale: sketchScale,\n                translate: sketchTranslate,\n                compositeOperation: this.compositeOperation,\n                bounds: bounds\n            });\n            if (sketchScale) {\n                if (this.getRotation(true) % 360 !== 0) {\n                    this._drawer._restoreRotationChanges(false);\n                }\n                if (this.viewport.degrees !== 0) {\n                    this._drawer._restoreRotationChanges(false);\n                }\n            }\n        }\n\n        if (!sketchScale) {\n            if (this.viewport.degrees === 0 && this.getRotation(true) % 360 === 0){\n                if(this._drawer.viewer.viewport.getFlip()) {\n                    this._drawer._flip();\n                }\n            }\n        }\n\n        this._drawDebugInfo( lastDrawn );\n    },\n\n    /**\n     * @private\n     * @inner\n     * Draws special debug information for a TiledImage if in debug mode.\n     * @param {OpenSeadragon.Tile[]} lastDrawn - An unordered list of Tiles drawn last frame.\n     */\n    _drawDebugInfo: function( lastDrawn ) {\n        if( this.debugMode ) {\n            for ( var i = lastDrawn.length - 1; i >= 0; i-- ) {\n                var tile = lastDrawn[ i ];\n                try {\n                    this._drawer.drawDebugInfo(tile, lastDrawn.length, i, this);\n                } catch(e) {\n                    $.console.error(e);\n                }\n            }\n        }\n    },\n\n    /**\n     * @private\n     * @inner\n     * Returns true if the given tile provides coverage to lower-level tiles of\n     * lower resolution representing the same content. If neither x nor y is\n     * given, returns true if the entire visible level provides coverage.\n     *\n     * Note that out-of-bounds tiles provide coverage in this sense, since\n     * there's no content that they would need to cover. Tiles at non-existent\n     * levels that are within the image bounds, however, do not.\n     *\n     * @param {Object} coverage - A '3d' dictionary [level][x][y] --> Boolean.\n     * @param {Number} level - The resolution level of the tile.\n     * @param {Number} x - The X position of the tile.\n     * @param {Number} y - The Y position of the tile.\n     * @returns {Boolean}\n     */\n    _providesCoverage: function( coverage, level, x, y ) {\n        var rows,\n            cols,\n            i, j;\n\n        if ( !coverage[ level ] ) {\n            return false;\n        }\n\n        if ( x === undefined || y === undefined ) {\n            rows = coverage[ level ];\n            for ( i in rows ) {\n                if ( Object.prototype.hasOwnProperty.call( rows, i ) ) {\n                    cols = rows[ i ];\n                    for ( j in cols ) {\n                        if ( Object.prototype.hasOwnProperty.call( cols, j ) && !cols[ j ] ) {\n                            return false;\n                        }\n                    }\n                }\n            }\n\n            return true;\n        }\n\n        return (\n            coverage[ level ][ x] === undefined ||\n            coverage[ level ][ x ][ y ] === undefined ||\n            coverage[ level ][ x ][ y ] === true\n        );\n    },\n\n    /**\n     * @private\n     * @inner\n     * Returns true if the given tile is completely covered by higher-level\n     * tiles of higher resolution representing the same content. If neither x\n     * nor y is given, returns true if the entire visible level is covered.\n     *\n     * @param {Object} coverage - A '3d' dictionary [level][x][y] --> Boolean.\n     * @param {Number} level - The resolution level of the tile.\n     * @param {Number} x - The X position of the tile.\n     * @param {Number} y - The Y position of the tile.\n     * @returns {Boolean}\n     */\n    _isCovered: function( coverage, level, x, y ) {\n        if ( x === undefined || y === undefined ) {\n            return this._providesCoverage( coverage, level + 1 );\n        } else {\n            return (\n                this._providesCoverage( coverage, level + 1, 2 * x, 2 * y ) &&\n                this._providesCoverage( coverage, level + 1, 2 * x, 2 * y + 1 ) &&\n                this._providesCoverage( coverage, level + 1, 2 * x + 1, 2 * y ) &&\n                this._providesCoverage( coverage, level + 1, 2 * x + 1, 2 * y + 1 )\n            );\n        }\n    },\n\n    /**\n     * @private\n     * @inner\n     * Sets whether the given tile provides coverage or not.\n     *\n     * @param {Object} coverage - A '3d' dictionary [level][x][y] --> Boolean.\n     * @param {Number} level - The resolution level of the tile.\n     * @param {Number} x - The X position of the tile.\n     * @param {Number} y - The Y position of the tile.\n     * @param {Boolean} covers - Whether the tile provides coverage.\n     */\n    _setCoverage: function( coverage, level, x, y, covers ) {\n        if ( !coverage[ level ] ) {\n            $.console.warn(\n                \"Setting coverage for a tile before its level's coverage has been reset: %s\",\n                level\n            );\n            return;\n        }\n\n        if ( !coverage[ level ][ x ] ) {\n            coverage[ level ][ x ] = {};\n        }\n\n        coverage[ level ][ x ][ y ] = covers;\n    },\n\n    /**\n     * @private\n     * @inner\n     * Resets coverage information for the given level. This should be called\n     * after every draw routine. Note that at the beginning of the next draw\n     * routine, coverage for every visible tile should be explicitly set.\n     *\n     * @param {Object} coverage - A '3d' dictionary [level][x][y] --> Boolean.\n     * @param {Number} level - The resolution level of tiles to completely reset.\n     */\n    _resetCoverage: function( coverage, level ) {\n        coverage[ level ] = {};\n    }\n});\n\n\n/**\n * @private\n * @inner\n * Defines the value for subpixel rounding to fallback to in case of missing or\n * invalid value.\n */\nvar DEFAULT_SUBPIXEL_ROUNDING_RULE = $.SUBPIXEL_ROUNDING_OCCURRENCES.NEVER;\n\n/**\n * @private\n * @inner\n * Checks whether the input value is an invalid subpixel rounding enum value.\n *\n * @param {SUBPIXEL_ROUNDING_OCCURRENCES} value - The subpixel rounding enum value to check.\n * @returns {Boolean} Returns true if the input value is none of the expected\n * {@link SUBPIXEL_ROUNDING_OCCURRENCES.ALWAYS}, {@link SUBPIXEL_ROUNDING_OCCURRENCES.ONLY_AT_REST} or {@link SUBPIXEL_ROUNDING_OCCURRENCES.NEVER} value.\n */\nfunction isSubPixelRoundingRuleUnknown(value) {\n    return value !== $.SUBPIXEL_ROUNDING_OCCURRENCES.ALWAYS &&\n        value !== $.SUBPIXEL_ROUNDING_OCCURRENCES.ONLY_AT_REST &&\n        value !== $.SUBPIXEL_ROUNDING_OCCURRENCES.NEVER;\n}\n\n/**\n * @private\n * @inner\n * Ensures the returned value is always a valid subpixel rounding enum value,\n * defaulting to {@link SUBPIXEL_ROUNDING_OCCURRENCES.NEVER} if input is missing or invalid.\n *\n * @param {SUBPIXEL_ROUNDING_OCCURRENCES} value - The subpixel rounding enum value to normalize.\n * @returns {SUBPIXEL_ROUNDING_OCCURRENCES} Returns a valid subpixel rounding enum value.\n */\nfunction normalizeSubPixelRoundingRule(value) {\n    if (isSubPixelRoundingRuleUnknown(value)) {\n        return DEFAULT_SUBPIXEL_ROUNDING_RULE;\n    }\n    return value;\n}\n\n/**\n * @private\n * @inner\n * Ensures the returned value is always a valid subpixel rounding enum value,\n * defaulting to 'NEVER' if input is missing or invalid.\n *\n * @param {Object} subPixelRoundingRules - A subpixel rounding enum values dictionary [{@link BROWSERS}] --> {@link SUBPIXEL_ROUNDING_OCCURRENCES}.\n * @returns {SUBPIXEL_ROUNDING_OCCURRENCES} Returns the determined subpixel rounding enum value for the\n * current browser.\n */\nfunction determineSubPixelRoundingRule(subPixelRoundingRules) {\n    if (typeof subPixelRoundingRules === 'number') {\n        return normalizeSubPixelRoundingRule(subPixelRoundingRules);\n    }\n\n    if (!subPixelRoundingRules || !$.Browser) {\n        return DEFAULT_SUBPIXEL_ROUNDING_RULE;\n    }\n\n    var subPixelRoundingRule = subPixelRoundingRules[$.Browser.vendor];\n\n    if (isSubPixelRoundingRuleUnknown(subPixelRoundingRule)) {\n        subPixelRoundingRule = subPixelRoundingRules['*'];\n    }\n\n    return normalizeSubPixelRoundingRule(subPixelRoundingRule);\n}\n\n}( OpenSeadragon ));\n\n/*\n * OpenSeadragon - TileCache\n *\n * Copyright (C) 2009 CodePlex Foundation\n * Copyright (C) 2010-2013 OpenSeadragon contributors\n *\n * Redistribution and use in source and binary forms, with or without\n * modification, are permitted provided that the following conditions are\n * met:\n *\n * - Redistributions of source code must retain the above copyright notice,\n *   this list of conditions and the following disclaimer.\n *\n * - Redistributions in binary form must reproduce the above copyright\n *   notice, this list of conditions and the following disclaimer in the\n *   documentation and/or other materials provided with the distribution.\n *\n * - Neither the name of CodePlex Foundation nor the names of its\n *   contributors may be used to endorse or promote products derived from\n *   this software without specific prior written permission.\n *\n * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS\n * \"AS IS\" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT\n * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR\n * A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT\n * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,\n * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED\n * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR\n * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF\n * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING\n * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS\n * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.\n */\n\n(function( $ ){\n\n// private class\nvar TileRecord = function( options ) {\n    $.console.assert( options, \"[TileCache.cacheTile] options is required\" );\n    $.console.assert( options.tile, \"[TileCache.cacheTile] options.tile is required\" );\n    $.console.assert( options.tiledImage, \"[TileCache.cacheTile] options.tiledImage is required\" );\n    this.tile = options.tile;\n    this.tiledImage = options.tiledImage;\n};\n\n// private class\nvar ImageRecord = function(options) {\n    $.console.assert( options, \"[ImageRecord] options is required\" );\n    $.console.assert( options.image, \"[ImageRecord] options.image is required\" );\n    this._image = options.image;\n    this._tiles = [];\n};\n\nImageRecord.prototype = {\n    destroy: function() {\n        this._image = null;\n        this._renderedContext = null;\n        this._tiles = null;\n    },\n\n    getImage: function() {\n        return this._image;\n    },\n\n    getRenderedContext: function() {\n        if (!this._renderedContext) {\n            var canvas = document.createElement( 'canvas' );\n            canvas.width = this._image.width;\n            canvas.height = this._image.height;\n            this._renderedContext = canvas.getContext('2d');\n            this._renderedContext.drawImage( this._image, 0, 0 );\n            //since we are caching the prerendered image on a canvas\n            //allow the image to not be held in memory\n            this._image = null;\n        }\n        return this._renderedContext;\n    },\n\n    setRenderedContext: function(renderedContext) {\n        $.console.error(\"ImageRecord.setRenderedContext is deprecated. \" +\n                \"The rendered context should be created by the ImageRecord \" +\n                \"itself when calling ImageRecord.getRenderedContext.\");\n        this._renderedContext = renderedContext;\n    },\n\n    addTile: function(tile) {\n        $.console.assert(tile, '[ImageRecord.addTile] tile is required');\n        this._tiles.push(tile);\n    },\n\n    removeTile: function(tile) {\n        for (var i = 0; i < this._tiles.length; i++) {\n            if (this._tiles[i] === tile) {\n                this._tiles.splice(i, 1);\n                return;\n            }\n        }\n\n        $.console.warn('[ImageRecord.removeTile] trying to remove unknown tile', tile);\n    },\n\n    getTileCount: function() {\n        return this._tiles.length;\n    }\n};\n\n/**\n * @class TileCache\n * @memberof OpenSeadragon\n * @classdesc Stores all the tiles displayed in a {@link OpenSeadragon.Viewer}.\n * You generally won't have to interact with the TileCache directly.\n * @param {Object} options - Configuration for this TileCache.\n * @param {Number} [options.maxImageCacheCount] - See maxImageCacheCount in\n * {@link OpenSeadragon.Options} for details.\n */\n$.TileCache = function( options ) {\n    options = options || {};\n\n    this._maxImageCacheCount = options.maxImageCacheCount || $.DEFAULT_SETTINGS.maxImageCacheCount;\n    this._tilesLoaded = [];\n    this._imagesLoaded = [];\n    this._imagesLoadedCount = 0;\n};\n\n/** @lends OpenSeadragon.TileCache.prototype */\n$.TileCache.prototype = {\n    /**\n     * @returns {Number} The total number of tiles that have been loaded by\n     * this TileCache.\n     */\n    numTilesLoaded: function() {\n        return this._tilesLoaded.length;\n    },\n\n    /**\n     * Caches the specified tile, removing an old tile if necessary to stay under the\n     * maxImageCacheCount specified on construction. Note that if multiple tiles reference\n     * the same image, there may be more tiles than maxImageCacheCount; the goal is to keep\n     * the number of images below that number. Note, as well, that even the number of images\n     * may temporarily surpass that number, but should eventually come back down to the max specified.\n     * @param {Object} options - Tile info.\n     * @param {OpenSeadragon.Tile} options.tile - The tile to cache.\n     * @param {String} options.tile.cacheKey - The unique key used to identify this tile in the cache.\n     * @param {Image} options.image - The image of the tile to cache.\n     * @param {OpenSeadragon.TiledImage} options.tiledImage - The TiledImage that owns that tile.\n     * @param {Number} [options.cutoff=0] - If adding this tile goes over the cache max count, this\n     * function will release an old tile. The cutoff option specifies a tile level at or below which\n     * tiles will not be released.\n     */\n    cacheTile: function( options ) {\n        $.console.assert( options, \"[TileCache.cacheTile] options is required\" );\n        $.console.assert( options.tile, \"[TileCache.cacheTile] options.tile is required\" );\n        $.console.assert( options.tile.cacheKey, \"[TileCache.cacheTile] options.tile.cacheKey is required\" );\n        $.console.assert( options.tiledImage, \"[TileCache.cacheTile] options.tiledImage is required\" );\n\n        var cutoff = options.cutoff || 0;\n        var insertionIndex = this._tilesLoaded.length;\n\n        var imageRecord = this._imagesLoaded[options.tile.cacheKey];\n        if (!imageRecord) {\n            $.console.assert( options.image, \"[TileCache.cacheTile] options.image is required to create an ImageRecord\" );\n            imageRecord = this._imagesLoaded[options.tile.cacheKey] = new ImageRecord({\n                image: options.image\n            });\n\n            this._imagesLoadedCount++;\n        }\n\n        imageRecord.addTile(options.tile);\n        options.tile.cacheImageRecord = imageRecord;\n\n        // Note that just because we're unloading a tile doesn't necessarily mean\n        // we're unloading an image. With repeated calls it should sort itself out, though.\n        if ( this._imagesLoadedCount > this._maxImageCacheCount ) {\n            var worstTile       = null;\n            var worstTileIndex  = -1;\n            var worstTileRecord = null;\n            var prevTile, worstTime, worstLevel, prevTime, prevLevel, prevTileRecord;\n\n            for ( var i = this._tilesLoaded.length - 1; i >= 0; i-- ) {\n                prevTileRecord = this._tilesLoaded[ i ];\n                prevTile = prevTileRecord.tile;\n\n                if ( prevTile.level <= cutoff || prevTile.beingDrawn ) {\n                    continue;\n                } else if ( !worstTile ) {\n                    worstTile       = prevTile;\n                    worstTileIndex  = i;\n                    worstTileRecord = prevTileRecord;\n                    continue;\n                }\n\n                prevTime    = prevTile.lastTouchTime;\n                worstTime   = worstTile.lastTouchTime;\n                prevLevel   = prevTile.level;\n                worstLevel  = worstTile.level;\n\n                if ( prevTime < worstTime ||\n                   ( prevTime === worstTime && prevLevel > worstLevel ) ) {\n                    worstTile       = prevTile;\n                    worstTileIndex  = i;\n                    worstTileRecord = prevTileRecord;\n                }\n            }\n\n            if ( worstTile && worstTileIndex >= 0 ) {\n                this._unloadTile(worstTileRecord);\n                insertionIndex = worstTileIndex;\n            }\n        }\n\n        this._tilesLoaded[ insertionIndex ] = new TileRecord({\n            tile: options.tile,\n            tiledImage: options.tiledImage\n        });\n    },\n\n    /**\n     * Clears all tiles associated with the specified tiledImage.\n     * @param {OpenSeadragon.TiledImage} tiledImage\n     */\n    clearTilesFor: function( tiledImage ) {\n        $.console.assert(tiledImage, '[TileCache.clearTilesFor] tiledImage is required');\n        var tileRecord;\n        for ( var i = 0; i < this._tilesLoaded.length; ++i ) {\n            tileRecord = this._tilesLoaded[ i ];\n            if ( tileRecord.tiledImage === tiledImage ) {\n                this._unloadTile(tileRecord);\n                this._tilesLoaded.splice( i, 1 );\n                i--;\n            }\n        }\n    },\n\n    // private\n    getImageRecord: function(cacheKey) {\n        $.console.assert(cacheKey, '[TileCache.getImageRecord] cacheKey is required');\n        return this._imagesLoaded[cacheKey];\n    },\n\n    // private\n    _unloadTile: function(tileRecord) {\n        $.console.assert(tileRecord, '[TileCache._unloadTile] tileRecord is required');\n        var tile = tileRecord.tile;\n        var tiledImage = tileRecord.tiledImage;\n\n        tile.unload();\n        tile.cacheImageRecord = null;\n\n        var imageRecord = this._imagesLoaded[tile.cacheKey];\n        imageRecord.removeTile(tile);\n        if (!imageRecord.getTileCount()) {\n            imageRecord.destroy();\n            delete this._imagesLoaded[tile.cacheKey];\n            this._imagesLoadedCount--;\n        }\n\n        /**\n         * Triggered when a tile has just been unloaded from memory.\n         *\n         * @event tile-unloaded\n         * @memberof OpenSeadragon.Viewer\n         * @type {object}\n         * @property {OpenSeadragon.TiledImage} tiledImage - The tiled image of the unloaded tile.\n         * @property {OpenSeadragon.Tile} tile - The tile which has been unloaded.\n         */\n        tiledImage.viewer.raiseEvent(\"tile-unloaded\", {\n            tile: tile,\n            tiledImage: tiledImage\n        });\n    }\n};\n\n}( OpenSeadragon ));\n\n/*\n * OpenSeadragon - World\n *\n * Copyright (C) 2009 CodePlex Foundation\n * Copyright (C) 2010-2013 OpenSeadragon contributors\n *\n * Redistribution and use in source and binary forms, with or without\n * modification, are permitted provided that the following conditions are\n * met:\n *\n * - Redistributions of source code must retain the above copyright notice,\n *   this list of conditions and the following disclaimer.\n *\n * - Redistributions in binary form must reproduce the above copyright\n *   notice, this list of conditions and the following disclaimer in the\n *   documentation and/or other materials provided with the distribution.\n *\n * - Neither the name of CodePlex Foundation nor the names of its\n *   contributors may be used to endorse or promote products derived from\n *   this software without specific prior written permission.\n *\n * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS\n * \"AS IS\" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT\n * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR\n * A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT\n * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,\n * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED\n * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR\n * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF\n * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING\n * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS\n * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.\n */\n\n(function( $ ){\n\n/**\n * @class World\n * @memberof OpenSeadragon\n * @extends OpenSeadragon.EventSource\n * @classdesc Keeps track of all of the tiled images in the scene.\n * @param {Object} options - World options.\n * @param {OpenSeadragon.Viewer} options.viewer - The Viewer that owns this World.\n **/\n$.World = function( options ) {\n    var _this = this;\n\n    $.console.assert( options.viewer, \"[World] options.viewer is required\" );\n\n    $.EventSource.call( this );\n\n    this.viewer = options.viewer;\n    this._items = [];\n    this._needsDraw = false;\n    this._autoRefigureSizes = true;\n    this._needsSizesFigured = false;\n    this._delegatedFigureSizes = function(event) {\n        if (_this._autoRefigureSizes) {\n            _this._figureSizes();\n        } else {\n            _this._needsSizesFigured = true;\n        }\n    };\n\n    this._figureSizes();\n};\n\n$.extend( $.World.prototype, $.EventSource.prototype, /** @lends OpenSeadragon.World.prototype */{\n    /**\n     * Add the specified item.\n     * @param {OpenSeadragon.TiledImage} item - The item to add.\n     * @param {Number} [options.index] - Index for the item. If not specified, goes at the top.\n     * @fires OpenSeadragon.World.event:add-item\n     * @fires OpenSeadragon.World.event:metrics-change\n     */\n    addItem: function( item, options ) {\n        $.console.assert(item, \"[World.addItem] item is required\");\n        $.console.assert(item instanceof $.TiledImage, \"[World.addItem] only TiledImages supported at this time\");\n\n        options = options || {};\n        if (options.index !== undefined) {\n            var index = Math.max(0, Math.min(this._items.length, options.index));\n            this._items.splice(index, 0, item);\n        } else {\n            this._items.push( item );\n        }\n\n        if (this._autoRefigureSizes) {\n            this._figureSizes();\n        } else {\n            this._needsSizesFigured = true;\n        }\n\n        this._needsDraw = true;\n\n        item.addHandler('bounds-change', this._delegatedFigureSizes);\n        item.addHandler('clip-change', this._delegatedFigureSizes);\n\n        /**\n         * Raised when an item is added to the World.\n         * @event add-item\n         * @memberOf OpenSeadragon.World\n         * @type {object}\n         * @property {OpenSeadragon.Viewer} eventSource - A reference to the World which raised the event.\n         * @property {OpenSeadragon.TiledImage} item - The item that has been added.\n         * @property {?Object} userData - Arbitrary subscriber-defined object.\n         */\n        this.raiseEvent( 'add-item', {\n            item: item\n        } );\n    },\n\n    /**\n     * Get the item at the specified index.\n     * @param {Number} index - The item's index.\n     * @returns {OpenSeadragon.TiledImage} The item at the specified index.\n     */\n    getItemAt: function( index ) {\n        $.console.assert(index !== undefined, \"[World.getItemAt] index is required\");\n        return this._items[ index ];\n    },\n\n    /**\n     * Get the index of the given item or -1 if not present.\n     * @param {OpenSeadragon.TiledImage} item - The item.\n     * @returns {Number} The index of the item or -1 if not present.\n     */\n    getIndexOfItem: function( item ) {\n        $.console.assert(item, \"[World.getIndexOfItem] item is required\");\n        return $.indexOf( this._items, item );\n    },\n\n    /**\n     * @returns {Number} The number of items used.\n     */\n    getItemCount: function() {\n        return this._items.length;\n    },\n\n    /**\n     * Change the index of a item so that it appears over or under others.\n     * @param {OpenSeadragon.TiledImage} item - The item to move.\n     * @param {Number} index - The new index.\n     * @fires OpenSeadragon.World.event:item-index-change\n     */\n    setItemIndex: function( item, index ) {\n        $.console.assert(item, \"[World.setItemIndex] item is required\");\n        $.console.assert(index !== undefined, \"[World.setItemIndex] index is required\");\n\n        var oldIndex = this.getIndexOfItem( item );\n\n        if ( index >= this._items.length ) {\n            throw new Error( \"Index bigger than number of layers.\" );\n        }\n\n        if ( index === oldIndex || oldIndex === -1 ) {\n            return;\n        }\n\n        this._items.splice( oldIndex, 1 );\n        this._items.splice( index, 0, item );\n        this._needsDraw = true;\n\n        /**\n         * Raised when the order of the indexes has been changed.\n         * @event item-index-change\n         * @memberOf OpenSeadragon.World\n         * @type {object}\n         * @property {OpenSeadragon.World} eventSource - A reference to the World which raised the event.\n         * @property {OpenSeadragon.TiledImage} item - The item whose index has\n         * been changed\n         * @property {Number} previousIndex - The previous index of the item\n         * @property {Number} newIndex - The new index of the item\n         * @property {?Object} userData - Arbitrary subscriber-defined object.\n         */\n        this.raiseEvent( 'item-index-change', {\n            item: item,\n            previousIndex: oldIndex,\n            newIndex: index\n        } );\n    },\n\n    /**\n     * Remove an item.\n     * @param {OpenSeadragon.TiledImage} item - The item to remove.\n     * @fires OpenSeadragon.World.event:remove-item\n     * @fires OpenSeadragon.World.event:metrics-change\n     */\n    removeItem: function( item ) {\n        $.console.assert(item, \"[World.removeItem] item is required\");\n\n        var index = $.indexOf(this._items, item );\n        if ( index === -1 ) {\n            return;\n        }\n\n        item.removeHandler('bounds-change', this._delegatedFigureSizes);\n        item.removeHandler('clip-change', this._delegatedFigureSizes);\n        item.destroy();\n        this._items.splice( index, 1 );\n        this._figureSizes();\n        this._needsDraw = true;\n        this._raiseRemoveItem(item);\n    },\n\n    /**\n     * Remove all items.\n     * @fires OpenSeadragon.World.event:remove-item\n     * @fires OpenSeadragon.World.event:metrics-change\n     */\n    removeAll: function() {\n        // We need to make sure any pending images are canceled so the world items don't get messed up\n        this.viewer._cancelPendingImages();\n        var item;\n        var i;\n        for (i = 0; i < this._items.length; i++) {\n            item = this._items[i];\n            item.removeHandler('bounds-change', this._delegatedFigureSizes);\n            item.removeHandler('clip-change', this._delegatedFigureSizes);\n            item.destroy();\n        }\n\n        var removedItems = this._items;\n        this._items = [];\n        this._figureSizes();\n        this._needsDraw = true;\n\n        for (i = 0; i < removedItems.length; i++) {\n            item = removedItems[i];\n            this._raiseRemoveItem(item);\n        }\n    },\n\n    /**\n     * Clears all tiles and triggers updates for all items.\n     */\n    resetItems: function() {\n        for ( var i = 0; i < this._items.length; i++ ) {\n            this._items[i].reset();\n        }\n    },\n\n    /**\n     * Updates (i.e. animates bounds of) all items.\n     */\n    update: function() {\n        var animated = false;\n        for ( var i = 0; i < this._items.length; i++ ) {\n            animated = this._items[i].update() || animated;\n        }\n\n        return animated;\n    },\n\n    /**\n     * Draws all items.\n     */\n    draw: function() {\n        for ( var i = 0; i < this._items.length; i++ ) {\n            this._items[i].draw();\n        }\n\n        this._needsDraw = false;\n    },\n\n    /**\n     * @returns {Boolean} true if any items need updating.\n     */\n    needsDraw: function() {\n        for ( var i = 0; i < this._items.length; i++ ) {\n            if ( this._items[i].needsDraw() ) {\n                return true;\n            }\n        }\n        return this._needsDraw;\n    },\n\n    /**\n     * @returns {OpenSeadragon.Rect} The smallest rectangle that encloses all items, in viewport coordinates.\n     */\n    getHomeBounds: function() {\n        return this._homeBounds.clone();\n    },\n\n    /**\n     * To facilitate zoom constraints, we keep track of the pixel density of the\n     * densest item in the World (i.e. the item whose content size to viewport size\n     * ratio is the highest) and save it as this \"content factor\".\n     * @returns {Number} the number of content units per viewport unit.\n     */\n    getContentFactor: function() {\n        return this._contentFactor;\n    },\n\n    /**\n     * As a performance optimization, setting this flag to false allows the bounds-change event handler\n     * on tiledImages to skip calculations on the world bounds. If a lot of images are going to be positioned in\n     * rapid succession, this is a good idea. When finished, setAutoRefigureSizes should be called with true\n     * or the system may behave oddly.\n     * @param {Boolean} [value] The value to which to set the flag.\n     */\n    setAutoRefigureSizes: function(value) {\n        this._autoRefigureSizes = value;\n        if (value & this._needsSizesFigured) {\n            this._figureSizes();\n            this._needsSizesFigured = false;\n        }\n    },\n\n    /**\n     * Arranges all of the TiledImages with the specified settings.\n     * @param {Object} options - Specifies how to arrange.\n     * @param {Boolean} [options.immediately=false] - Whether to animate to the new arrangement.\n     * @param {String} [options.layout] - See collectionLayout in {@link OpenSeadragon.Options}.\n     * @param {Number} [options.rows] - See collectionRows in {@link OpenSeadragon.Options}.\n     * @param {Number} [options.columns] - See collectionColumns in {@link OpenSeadragon.Options}.\n     * @param {Number} [options.tileSize] - See collectionTileSize in {@link OpenSeadragon.Options}.\n     * @param {Number} [options.tileMargin] - See collectionTileMargin in {@link OpenSeadragon.Options}.\n     * @fires OpenSeadragon.World.event:metrics-change\n     */\n    arrange: function(options) {\n        options = options || {};\n        var immediately = options.immediately || false;\n        var layout = options.layout || $.DEFAULT_SETTINGS.collectionLayout;\n        var rows = options.rows || $.DEFAULT_SETTINGS.collectionRows;\n        var columns = options.columns || $.DEFAULT_SETTINGS.collectionColumns;\n        var tileSize = options.tileSize || $.DEFAULT_SETTINGS.collectionTileSize;\n        var tileMargin = options.tileMargin || $.DEFAULT_SETTINGS.collectionTileMargin;\n        var increment = tileSize + tileMargin;\n        var wrap;\n        if (!options.rows && columns) {\n            wrap = columns;\n        } else {\n            wrap = Math.ceil(this._items.length / rows);\n        }\n        var x = 0;\n        var y = 0;\n        var item, box, width, height, position;\n\n        this.setAutoRefigureSizes(false);\n        for (var i = 0; i < this._items.length; i++) {\n            if (i && (i % wrap) === 0) {\n                if (layout === 'horizontal') {\n                    y += increment;\n                    x = 0;\n                } else {\n                    x += increment;\n                    y = 0;\n                }\n            }\n\n            item = this._items[i];\n            box = item.getBounds();\n            if (box.width > box.height) {\n                width = tileSize;\n            } else {\n                width = tileSize * (box.width / box.height);\n            }\n\n            height = width * (box.height / box.width);\n            position = new $.Point(x + ((tileSize - width) / 2),\n                y + ((tileSize - height) / 2));\n\n            item.setPosition(position, immediately);\n            item.setWidth(width, immediately);\n\n            if (layout === 'horizontal') {\n                x += increment;\n            } else {\n                y += increment;\n            }\n        }\n        this.setAutoRefigureSizes(true);\n    },\n\n    // private\n    _figureSizes: function() {\n        var oldHomeBounds = this._homeBounds ? this._homeBounds.clone() : null;\n        var oldContentSize = this._contentSize ? this._contentSize.clone() : null;\n        var oldContentFactor = this._contentFactor || 0;\n\n        if (!this._items.length) {\n            this._homeBounds = new $.Rect(0, 0, 1, 1);\n            this._contentSize = new $.Point(1, 1);\n            this._contentFactor = 1;\n        } else {\n            var item = this._items[0];\n            var bounds = item.getBounds();\n            this._contentFactor = item.getContentSize().x / bounds.width;\n            var clippedBounds = item.getClippedBounds().getBoundingBox();\n            var left = clippedBounds.x;\n            var top = clippedBounds.y;\n            var right = clippedBounds.x + clippedBounds.width;\n            var bottom = clippedBounds.y + clippedBounds.height;\n            for (var i = 1; i < this._items.length; i++) {\n                item = this._items[i];\n                bounds = item.getBounds();\n                this._contentFactor = Math.max(this._contentFactor,\n                    item.getContentSize().x / bounds.width);\n                clippedBounds = item.getClippedBounds().getBoundingBox();\n                left = Math.min(left, clippedBounds.x);\n                top = Math.min(top, clippedBounds.y);\n                right = Math.max(right, clippedBounds.x + clippedBounds.width);\n                bottom = Math.max(bottom, clippedBounds.y + clippedBounds.height);\n            }\n\n            this._homeBounds = new $.Rect(left, top, right - left, bottom - top);\n            this._contentSize = new $.Point(\n                this._homeBounds.width * this._contentFactor,\n                this._homeBounds.height * this._contentFactor);\n        }\n\n        if (this._contentFactor !== oldContentFactor ||\n            !this._homeBounds.equals(oldHomeBounds) ||\n            !this._contentSize.equals(oldContentSize)) {\n            /**\n             * Raised when the home bounds or content factor change.\n             * @event metrics-change\n             * @memberOf OpenSeadragon.World\n             * @type {object}\n             * @property {OpenSeadragon.World} eventSource - A reference to the World which raised the event.\n             * @property {?Object} userData - Arbitrary subscriber-defined object.\n             */\n            this.raiseEvent('metrics-change', {});\n        }\n    },\n\n    // private\n    _raiseRemoveItem: function(item) {\n        /**\n         * Raised when an item is removed.\n         * @event remove-item\n         * @memberOf OpenSeadragon.World\n         * @type {object}\n         * @property {OpenSeadragon.World} eventSource - A reference to the World which raised the event.\n         * @property {OpenSeadragon.TiledImage} item - The item's underlying item.\n         * @property {?Object} userData - Arbitrary subscriber-defined object.\n         */\n        this.raiseEvent( 'remove-item', { item: item } );\n    }\n});\n\n}( OpenSeadragon ));\n\n//# sourceMappingURL=openseadragon.js.map","/**\n * Copyright (c) 2013-present, Facebook, Inc.\n *\n * This source code is licensed under the MIT license found in the\n * LICENSE file in the root directory of this source tree.\n */\n\n'use strict';\n\nvar printWarning = function() {};\n\nif (process.env.NODE_ENV !== 'production') {\n  var ReactPropTypesSecret = require('./lib/ReactPropTypesSecret');\n  var loggedTypeFailures = {};\n  var has = require('./lib/has');\n\n  printWarning = function(text) {\n    var message = 'Warning: ' + text;\n    if (typeof console !== 'undefined') {\n      console.error(message);\n    }\n    try {\n      // --- Welcome to debugging React ---\n      // This error was thrown as a convenience so that you can use this stack\n      // to find the callsite that caused this warning to fire.\n      throw new Error(message);\n    } catch (x) { /**/ }\n  };\n}\n\n/**\n * Assert that the values match with the type specs.\n * Error messages are memorized and will only be shown once.\n *\n * @param {object} typeSpecs Map of name to a ReactPropType\n * @param {object} values Runtime values that need to be type-checked\n * @param {string} location e.g. \"prop\", \"context\", \"child context\"\n * @param {string} componentName Name of the component for error messages.\n * @param {?Function} getStack Returns the component stack.\n * @private\n */\nfunction checkPropTypes(typeSpecs, values, location, componentName, getStack) {\n  if (process.env.NODE_ENV !== 'production') {\n    for (var typeSpecName in typeSpecs) {\n      if (has(typeSpecs, typeSpecName)) {\n        var error;\n        // Prop type validation may throw. In case they do, we don't want to\n        // fail the render phase where it didn't fail before. So we log it.\n        // After these have been cleaned up, we'll let them throw.\n        try {\n          // This is intentionally an invariant that gets caught. It's the same\n          // behavior as without this statement except with a better message.\n          if (typeof typeSpecs[typeSpecName] !== 'function') {\n            var err = Error(\n              (componentName || 'React class') + ': ' + location + ' type `' + typeSpecName + '` is invalid; ' +\n              'it must be a function, usually from the `prop-types` package, but received `' + typeof typeSpecs[typeSpecName] + '`.' +\n              'This often happens because of typos such as `PropTypes.function` instead of `PropTypes.func`.'\n            );\n            err.name = 'Invariant Violation';\n            throw err;\n          }\n          error = typeSpecs[typeSpecName](values, typeSpecName, componentName, location, null, ReactPropTypesSecret);\n        } catch (ex) {\n          error = ex;\n        }\n        if (error && !(error instanceof Error)) {\n          printWarning(\n            (componentName || 'React class') + ': type specification of ' +\n            location + ' `' + typeSpecName + '` is invalid; the type checker ' +\n            'function must return `null` or an `Error` but returned a ' + typeof error + '. ' +\n            'You may have forgotten to pass an argument to the type checker ' +\n            'creator (arrayOf, instanceOf, objectOf, oneOf, oneOfType, and ' +\n            'shape all require an argument).'\n          );\n        }\n        if (error instanceof Error && !(error.message in loggedTypeFailures)) {\n          // Only monitor this failure once because there tends to be a lot of the\n          // same error.\n          loggedTypeFailures[error.message] = true;\n\n          var stack = getStack ? getStack() : '';\n\n          printWarning(\n            'Failed ' + location + ' type: ' + error.message + (stack != null ? stack : '')\n          );\n        }\n      }\n    }\n  }\n}\n\n/**\n * Resets warning cache when testing.\n *\n * @private\n */\ncheckPropTypes.resetWarningCache = function() {\n  if (process.env.NODE_ENV !== 'production') {\n    loggedTypeFailures = {};\n  }\n}\n\nmodule.exports = checkPropTypes;\n","/**\n * Copyright (c) 2013-present, Facebook, Inc.\n *\n * This source code is licensed under the MIT license found in the\n * LICENSE file in the root directory of this source tree.\n */\n\n'use strict';\n\nvar ReactIs = require('react-is');\nvar assign = require('object-assign');\n\nvar ReactPropTypesSecret = require('./lib/ReactPropTypesSecret');\nvar has = require('./lib/has');\nvar checkPropTypes = require('./checkPropTypes');\n\nvar printWarning = function() {};\n\nif (process.env.NODE_ENV !== 'production') {\n  printWarning = function(text) {\n    var message = 'Warning: ' + text;\n    if (typeof console !== 'undefined') {\n      console.error(message);\n    }\n    try {\n      // --- Welcome to debugging React ---\n      // This error was thrown as a convenience so that you can use this stack\n      // to find the callsite that caused this warning to fire.\n      throw new Error(message);\n    } catch (x) {}\n  };\n}\n\nfunction emptyFunctionThatReturnsNull() {\n  return null;\n}\n\nmodule.exports = function(isValidElement, throwOnDirectAccess) {\n  /* global Symbol */\n  var ITERATOR_SYMBOL = typeof Symbol === 'function' && Symbol.iterator;\n  var FAUX_ITERATOR_SYMBOL = '@@iterator'; // Before Symbol spec.\n\n  /**\n   * Returns the iterator method function contained on the iterable object.\n   *\n   * Be sure to invoke the function with the iterable as context:\n   *\n   *     var iteratorFn = getIteratorFn(myIterable);\n   *     if (iteratorFn) {\n   *       var iterator = iteratorFn.call(myIterable);\n   *       ...\n   *     }\n   *\n   * @param {?object} maybeIterable\n   * @return {?function}\n   */\n  function getIteratorFn(maybeIterable) {\n    var iteratorFn = maybeIterable && (ITERATOR_SYMBOL && maybeIterable[ITERATOR_SYMBOL] || maybeIterable[FAUX_ITERATOR_SYMBOL]);\n    if (typeof iteratorFn === 'function') {\n      return iteratorFn;\n    }\n  }\n\n  /**\n   * Collection of methods that allow declaration and validation of props that are\n   * supplied to React components. Example usage:\n   *\n   *   var Props = require('ReactPropTypes');\n   *   var MyArticle = React.createClass({\n   *     propTypes: {\n   *       // An optional string prop named \"description\".\n   *       description: Props.string,\n   *\n   *       // A required enum prop named \"category\".\n   *       category: Props.oneOf(['News','Photos']).isRequired,\n   *\n   *       // A prop named \"dialog\" that requires an instance of Dialog.\n   *       dialog: Props.instanceOf(Dialog).isRequired\n   *     },\n   *     render: function() { ... }\n   *   });\n   *\n   * A more formal specification of how these methods are used:\n   *\n   *   type := array|bool|func|object|number|string|oneOf([...])|instanceOf(...)\n   *   decl := ReactPropTypes.{type}(.isRequired)?\n   *\n   * Each and every declaration produces a function with the same signature. This\n   * allows the creation of custom validation functions. For example:\n   *\n   *  var MyLink = React.createClass({\n   *    propTypes: {\n   *      // An optional string or URI prop named \"href\".\n   *      href: function(props, propName, componentName) {\n   *        var propValue = props[propName];\n   *        if (propValue != null && typeof propValue !== 'string' &&\n   *            !(propValue instanceof URI)) {\n   *          return new Error(\n   *            'Expected a string or an URI for ' + propName + ' in ' +\n   *            componentName\n   *          );\n   *        }\n   *      }\n   *    },\n   *    render: function() {...}\n   *  });\n   *\n   * @internal\n   */\n\n  var ANONYMOUS = '<<anonymous>>';\n\n  // Important!\n  // Keep this list in sync with production version in `./factoryWithThrowingShims.js`.\n  var ReactPropTypes = {\n    array: createPrimitiveTypeChecker('array'),\n    bigint: createPrimitiveTypeChecker('bigint'),\n    bool: createPrimitiveTypeChecker('boolean'),\n    func: createPrimitiveTypeChecker('function'),\n    number: createPrimitiveTypeChecker('number'),\n    object: createPrimitiveTypeChecker('object'),\n    string: createPrimitiveTypeChecker('string'),\n    symbol: createPrimitiveTypeChecker('symbol'),\n\n    any: createAnyTypeChecker(),\n    arrayOf: createArrayOfTypeChecker,\n    element: createElementTypeChecker(),\n    elementType: createElementTypeTypeChecker(),\n    instanceOf: createInstanceTypeChecker,\n    node: createNodeChecker(),\n    objectOf: createObjectOfTypeChecker,\n    oneOf: createEnumTypeChecker,\n    oneOfType: createUnionTypeChecker,\n    shape: createShapeTypeChecker,\n    exact: createStrictShapeTypeChecker,\n  };\n\n  /**\n   * inlined Object.is polyfill to avoid requiring consumers ship their own\n   * https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/is\n   */\n  /*eslint-disable no-self-compare*/\n  function is(x, y) {\n    // SameValue algorithm\n    if (x === y) {\n      // Steps 1-5, 7-10\n      // Steps 6.b-6.e: +0 != -0\n      return x !== 0 || 1 / x === 1 / y;\n    } else {\n      // Step 6.a: NaN == NaN\n      return x !== x && y !== y;\n    }\n  }\n  /*eslint-enable no-self-compare*/\n\n  /**\n   * We use an Error-like object for backward compatibility as people may call\n   * PropTypes directly and inspect their output. However, we don't use real\n   * Errors anymore. We don't inspect their stack anyway, and creating them\n   * is prohibitively expensive if they are created too often, such as what\n   * happens in oneOfType() for any type before the one that matched.\n   */\n  function PropTypeError(message, data) {\n    this.message = message;\n    this.data = data && typeof data === 'object' ? data: {};\n    this.stack = '';\n  }\n  // Make `instanceof Error` still work for returned errors.\n  PropTypeError.prototype = Error.prototype;\n\n  function createChainableTypeChecker(validate) {\n    if (process.env.NODE_ENV !== 'production') {\n      var manualPropTypeCallCache = {};\n      var manualPropTypeWarningCount = 0;\n    }\n    function checkType(isRequired, props, propName, componentName, location, propFullName, secret) {\n      componentName = componentName || ANONYMOUS;\n      propFullName = propFullName || propName;\n\n      if (secret !== ReactPropTypesSecret) {\n        if (throwOnDirectAccess) {\n          // New behavior only for users of `prop-types` package\n          var err = new Error(\n            'Calling PropTypes validators directly is not supported by the `prop-types` package. ' +\n            'Use `PropTypes.checkPropTypes()` to call them. ' +\n            'Read more at http://fb.me/use-check-prop-types'\n          );\n          err.name = 'Invariant Violation';\n          throw err;\n        } else if (process.env.NODE_ENV !== 'production' && typeof console !== 'undefined') {\n          // Old behavior for people using React.PropTypes\n          var cacheKey = componentName + ':' + propName;\n          if (\n            !manualPropTypeCallCache[cacheKey] &&\n            // Avoid spamming the console because they are often not actionable except for lib authors\n            manualPropTypeWarningCount < 3\n          ) {\n            printWarning(\n              'You are manually calling a React.PropTypes validation ' +\n              'function for the `' + propFullName + '` prop on `' + componentName + '`. This is deprecated ' +\n              'and will throw in the standalone `prop-types` package. ' +\n              'You may be seeing this warning due to a third-party PropTypes ' +\n              'library. See https://fb.me/react-warning-dont-call-proptypes ' + 'for details.'\n            );\n            manualPropTypeCallCache[cacheKey] = true;\n            manualPropTypeWarningCount++;\n          }\n        }\n      }\n      if (props[propName] == null) {\n        if (isRequired) {\n          if (props[propName] === null) {\n            return new PropTypeError('The ' + location + ' `' + propFullName + '` is marked as required ' + ('in `' + componentName + '`, but its value is `null`.'));\n          }\n          return new PropTypeError('The ' + location + ' `' + propFullName + '` is marked as required in ' + ('`' + componentName + '`, but its value is `undefined`.'));\n        }\n        return null;\n      } else {\n        return validate(props, propName, componentName, location, propFullName);\n      }\n    }\n\n    var chainedCheckType = checkType.bind(null, false);\n    chainedCheckType.isRequired = checkType.bind(null, true);\n\n    return chainedCheckType;\n  }\n\n  function createPrimitiveTypeChecker(expectedType) {\n    function validate(props, propName, componentName, location, propFullName, secret) {\n      var propValue = props[propName];\n      var propType = getPropType(propValue);\n      if (propType !== expectedType) {\n        // `propValue` being instance of, say, date/regexp, pass the 'object'\n        // check, but we can offer a more precise error message here rather than\n        // 'of type `object`'.\n        var preciseType = getPreciseType(propValue);\n\n        return new PropTypeError(\n          'Invalid ' + location + ' `' + propFullName + '` of type ' + ('`' + preciseType + '` supplied to `' + componentName + '`, expected ') + ('`' + expectedType + '`.'),\n          {expectedType: expectedType}\n        );\n      }\n      return null;\n    }\n    return createChainableTypeChecker(validate);\n  }\n\n  function createAnyTypeChecker() {\n    return createChainableTypeChecker(emptyFunctionThatReturnsNull);\n  }\n\n  function createArrayOfTypeChecker(typeChecker) {\n    function validate(props, propName, componentName, location, propFullName) {\n      if (typeof typeChecker !== 'function') {\n        return new PropTypeError('Property `' + propFullName + '` of component `' + componentName + '` has invalid PropType notation inside arrayOf.');\n      }\n      var propValue = props[propName];\n      if (!Array.isArray(propValue)) {\n        var propType = getPropType(propValue);\n        return new PropTypeError('Invalid ' + location + ' `' + propFullName + '` of type ' + ('`' + propType + '` supplied to `' + componentName + '`, expected an array.'));\n      }\n      for (var i = 0; i < propValue.length; i++) {\n        var error = typeChecker(propValue, i, componentName, location, propFullName + '[' + i + ']', ReactPropTypesSecret);\n        if (error instanceof Error) {\n          return error;\n        }\n      }\n      return null;\n    }\n    return createChainableTypeChecker(validate);\n  }\n\n  function createElementTypeChecker() {\n    function validate(props, propName, componentName, location, propFullName) {\n      var propValue = props[propName];\n      if (!isValidElement(propValue)) {\n        var propType = getPropType(propValue);\n        return new PropTypeError('Invalid ' + location + ' `' + propFullName + '` of type ' + ('`' + propType + '` supplied to `' + componentName + '`, expected a single ReactElement.'));\n      }\n      return null;\n    }\n    return createChainableTypeChecker(validate);\n  }\n\n  function createElementTypeTypeChecker() {\n    function validate(props, propName, componentName, location, propFullName) {\n      var propValue = props[propName];\n      if (!ReactIs.isValidElementType(propValue)) {\n        var propType = getPropType(propValue);\n        return new PropTypeError('Invalid ' + location + ' `' + propFullName + '` of type ' + ('`' + propType + '` supplied to `' + componentName + '`, expected a single ReactElement type.'));\n      }\n      return null;\n    }\n    return createChainableTypeChecker(validate);\n  }\n\n  function createInstanceTypeChecker(expectedClass) {\n    function validate(props, propName, componentName, location, propFullName) {\n      if (!(props[propName] instanceof expectedClass)) {\n        var expectedClassName = expectedClass.name || ANONYMOUS;\n        var actualClassName = getClassName(props[propName]);\n        return new PropTypeError('Invalid ' + location + ' `' + propFullName + '` of type ' + ('`' + actualClassName + '` supplied to `' + componentName + '`, expected ') + ('instance of `' + expectedClassName + '`.'));\n      }\n      return null;\n    }\n    return createChainableTypeChecker(validate);\n  }\n\n  function createEnumTypeChecker(expectedValues) {\n    if (!Array.isArray(expectedValues)) {\n      if (process.env.NODE_ENV !== 'production') {\n        if (arguments.length > 1) {\n          printWarning(\n            'Invalid arguments supplied to oneOf, expected an array, got ' + arguments.length + ' arguments. ' +\n            'A common mistake is to write oneOf(x, y, z) instead of oneOf([x, y, z]).'\n          );\n        } else {\n          printWarning('Invalid argument supplied to oneOf, expected an array.');\n        }\n      }\n      return emptyFunctionThatReturnsNull;\n    }\n\n    function validate(props, propName, componentName, location, propFullName) {\n      var propValue = props[propName];\n      for (var i = 0; i < expectedValues.length; i++) {\n        if (is(propValue, expectedValues[i])) {\n          return null;\n        }\n      }\n\n      var valuesString = JSON.stringify(expectedValues, function replacer(key, value) {\n        var type = getPreciseType(value);\n        if (type === 'symbol') {\n          return String(value);\n        }\n        return value;\n      });\n      return new PropTypeError('Invalid ' + location + ' `' + propFullName + '` of value `' + String(propValue) + '` ' + ('supplied to `' + componentName + '`, expected one of ' + valuesString + '.'));\n    }\n    return createChainableTypeChecker(validate);\n  }\n\n  function createObjectOfTypeChecker(typeChecker) {\n    function validate(props, propName, componentName, location, propFullName) {\n      if (typeof typeChecker !== 'function') {\n        return new PropTypeError('Property `' + propFullName + '` of component `' + componentName + '` has invalid PropType notation inside objectOf.');\n      }\n      var propValue = props[propName];\n      var propType = getPropType(propValue);\n      if (propType !== 'object') {\n        return new PropTypeError('Invalid ' + location + ' `' + propFullName + '` of type ' + ('`' + propType + '` supplied to `' + componentName + '`, expected an object.'));\n      }\n      for (var key in propValue) {\n        if (has(propValue, key)) {\n          var error = typeChecker(propValue, key, componentName, location, propFullName + '.' + key, ReactPropTypesSecret);\n          if (error instanceof Error) {\n            return error;\n          }\n        }\n      }\n      return null;\n    }\n    return createChainableTypeChecker(validate);\n  }\n\n  function createUnionTypeChecker(arrayOfTypeCheckers) {\n    if (!Array.isArray(arrayOfTypeCheckers)) {\n      process.env.NODE_ENV !== 'production' ? printWarning('Invalid argument supplied to oneOfType, expected an instance of array.') : void 0;\n      return emptyFunctionThatReturnsNull;\n    }\n\n    for (var i = 0; i < arrayOfTypeCheckers.length; i++) {\n      var checker = arrayOfTypeCheckers[i];\n      if (typeof checker !== 'function') {\n        printWarning(\n          'Invalid argument supplied to oneOfType. Expected an array of check functions, but ' +\n          'received ' + getPostfixForTypeWarning(checker) + ' at index ' + i + '.'\n        );\n        return emptyFunctionThatReturnsNull;\n      }\n    }\n\n    function validate(props, propName, componentName, location, propFullName) {\n      var expectedTypes = [];\n      for (var i = 0; i < arrayOfTypeCheckers.length; i++) {\n        var checker = arrayOfTypeCheckers[i];\n        var checkerResult = checker(props, propName, componentName, location, propFullName, ReactPropTypesSecret);\n        if (checkerResult == null) {\n          return null;\n        }\n        if (checkerResult.data && has(checkerResult.data, 'expectedType')) {\n          expectedTypes.push(checkerResult.data.expectedType);\n        }\n      }\n      var expectedTypesMessage = (expectedTypes.length > 0) ? ', expected one of type [' + expectedTypes.join(', ') + ']': '';\n      return new PropTypeError('Invalid ' + location + ' `' + propFullName + '` supplied to ' + ('`' + componentName + '`' + expectedTypesMessage + '.'));\n    }\n    return createChainableTypeChecker(validate);\n  }\n\n  function createNodeChecker() {\n    function validate(props, propName, componentName, location, propFullName) {\n      if (!isNode(props[propName])) {\n        return new PropTypeError('Invalid ' + location + ' `' + propFullName + '` supplied to ' + ('`' + componentName + '`, expected a ReactNode.'));\n      }\n      return null;\n    }\n    return createChainableTypeChecker(validate);\n  }\n\n  function invalidValidatorError(componentName, location, propFullName, key, type) {\n    return new PropTypeError(\n      (componentName || 'React class') + ': ' + location + ' type `' + propFullName + '.' + key + '` is invalid; ' +\n      'it must be a function, usually from the `prop-types` package, but received `' + type + '`.'\n    );\n  }\n\n  function createShapeTypeChecker(shapeTypes) {\n    function validate(props, propName, componentName, location, propFullName) {\n      var propValue = props[propName];\n      var propType = getPropType(propValue);\n      if (propType !== 'object') {\n        return new PropTypeError('Invalid ' + location + ' `' + propFullName + '` of type `' + propType + '` ' + ('supplied to `' + componentName + '`, expected `object`.'));\n      }\n      for (var key in shapeTypes) {\n        var checker = shapeTypes[key];\n        if (typeof checker !== 'function') {\n          return invalidValidatorError(componentName, location, propFullName, key, getPreciseType(checker));\n        }\n        var error = checker(propValue, key, componentName, location, propFullName + '.' + key, ReactPropTypesSecret);\n        if (error) {\n          return error;\n        }\n      }\n      return null;\n    }\n    return createChainableTypeChecker(validate);\n  }\n\n  function createStrictShapeTypeChecker(shapeTypes) {\n    function validate(props, propName, componentName, location, propFullName) {\n      var propValue = props[propName];\n      var propType = getPropType(propValue);\n      if (propType !== 'object') {\n        return new PropTypeError('Invalid ' + location + ' `' + propFullName + '` of type `' + propType + '` ' + ('supplied to `' + componentName + '`, expected `object`.'));\n      }\n      // We need to check all keys in case some are required but missing from props.\n      var allKeys = assign({}, props[propName], shapeTypes);\n      for (var key in allKeys) {\n        var checker = shapeTypes[key];\n        if (has(shapeTypes, key) && typeof checker !== 'function') {\n          return invalidValidatorError(componentName, location, propFullName, key, getPreciseType(checker));\n        }\n        if (!checker) {\n          return new PropTypeError(\n            'Invalid ' + location + ' `' + propFullName + '` key `' + key + '` supplied to `' + componentName + '`.' +\n            '\\nBad object: ' + JSON.stringify(props[propName], null, '  ') +\n            '\\nValid keys: ' + JSON.stringify(Object.keys(shapeTypes), null, '  ')\n          );\n        }\n        var error = checker(propValue, key, componentName, location, propFullName + '.' + key, ReactPropTypesSecret);\n        if (error) {\n          return error;\n        }\n      }\n      return null;\n    }\n\n    return createChainableTypeChecker(validate);\n  }\n\n  function isNode(propValue) {\n    switch (typeof propValue) {\n      case 'number':\n      case 'string':\n      case 'undefined':\n        return true;\n      case 'boolean':\n        return !propValue;\n      case 'object':\n        if (Array.isArray(propValue)) {\n          return propValue.every(isNode);\n        }\n        if (propValue === null || isValidElement(propValue)) {\n          return true;\n        }\n\n        var iteratorFn = getIteratorFn(propValue);\n        if (iteratorFn) {\n          var iterator = iteratorFn.call(propValue);\n          var step;\n          if (iteratorFn !== propValue.entries) {\n            while (!(step = iterator.next()).done) {\n              if (!isNode(step.value)) {\n                return false;\n              }\n            }\n          } else {\n            // Iterator will provide entry [k,v] tuples rather than values.\n            while (!(step = iterator.next()).done) {\n              var entry = step.value;\n              if (entry) {\n                if (!isNode(entry[1])) {\n                  return false;\n                }\n              }\n            }\n          }\n        } else {\n          return false;\n        }\n\n        return true;\n      default:\n        return false;\n    }\n  }\n\n  function isSymbol(propType, propValue) {\n    // Native Symbol.\n    if (propType === 'symbol') {\n      return true;\n    }\n\n    // falsy value can't be a Symbol\n    if (!propValue) {\n      return false;\n    }\n\n    // 19.4.3.5 Symbol.prototype[@@toStringTag] === 'Symbol'\n    if (propValue['@@toStringTag'] === 'Symbol') {\n      return true;\n    }\n\n    // Fallback for non-spec compliant Symbols which are polyfilled.\n    if (typeof Symbol === 'function' && propValue instanceof Symbol) {\n      return true;\n    }\n\n    return false;\n  }\n\n  // Equivalent of `typeof` but with special handling for array and regexp.\n  function getPropType(propValue) {\n    var propType = typeof propValue;\n    if (Array.isArray(propValue)) {\n      return 'array';\n    }\n    if (propValue instanceof RegExp) {\n      // Old webkits (at least until Android 4.0) return 'function' rather than\n      // 'object' for typeof a RegExp. We'll normalize this here so that /bla/\n      // passes PropTypes.object.\n      return 'object';\n    }\n    if (isSymbol(propType, propValue)) {\n      return 'symbol';\n    }\n    return propType;\n  }\n\n  // This handles more types than `getPropType`. Only used for error messages.\n  // See `createPrimitiveTypeChecker`.\n  function getPreciseType(propValue) {\n    if (typeof propValue === 'undefined' || propValue === null) {\n      return '' + propValue;\n    }\n    var propType = getPropType(propValue);\n    if (propType === 'object') {\n      if (propValue instanceof Date) {\n        return 'date';\n      } else if (propValue instanceof RegExp) {\n        return 'regexp';\n      }\n    }\n    return propType;\n  }\n\n  // Returns a string that is postfixed to a warning about an invalid type.\n  // For example, \"undefined\" or \"of type array\"\n  function getPostfixForTypeWarning(value) {\n    var type = getPreciseType(value);\n    switch (type) {\n      case 'array':\n      case 'object':\n        return 'an ' + type;\n      case 'boolean':\n      case 'date':\n      case 'regexp':\n        return 'a ' + type;\n      default:\n        return type;\n    }\n  }\n\n  // Returns class name of the object, if any.\n  function getClassName(propValue) {\n    if (!propValue.constructor || !propValue.constructor.name) {\n      return ANONYMOUS;\n    }\n    return propValue.constructor.name;\n  }\n\n  ReactPropTypes.checkPropTypes = checkPropTypes;\n  ReactPropTypes.resetWarningCache = checkPropTypes.resetWarningCache;\n  ReactPropTypes.PropTypes = ReactPropTypes;\n\n  return ReactPropTypes;\n};\n","/**\n * Copyright (c) 2013-present, Facebook, Inc.\n *\n * This source code is licensed under the MIT license found in the\n * LICENSE file in the root directory of this source tree.\n */\n\nif (process.env.NODE_ENV !== 'production') {\n  var ReactIs = require('react-is');\n\n  // By explicitly using `prop-types` you are opting into new development behavior.\n  // http://fb.me/prop-types-in-prod\n  var throwOnDirectAccess = true;\n  module.exports = require('./factoryWithTypeCheckers')(ReactIs.isElement, throwOnDirectAccess);\n} else {\n  // By explicitly using `prop-types` you are opting into new production behavior.\n  // http://fb.me/prop-types-in-prod\n  module.exports = require('./factoryWithThrowingShims')();\n}\n","/**\n * Copyright (c) 2013-present, Facebook, Inc.\n *\n * This source code is licensed under the MIT license found in the\n * LICENSE file in the root directory of this source tree.\n */\n\n'use strict';\n\nvar ReactPropTypesSecret = 'SECRET_DO_NOT_PASS_THIS_OR_YOU_WILL_BE_FIRED';\n\nmodule.exports = ReactPropTypesSecret;\n","module.exports = Function.call.bind(Object.prototype.hasOwnProperty);\n","/** @license React v17.0.2\n * react-dom.development.js\n *\n * Copyright (c) Facebook, Inc. and its affiliates.\n *\n * This source code is licensed under the MIT license found in the\n * LICENSE file in the root directory of this source tree.\n */\n\n'use strict';\n\nif (process.env.NODE_ENV !== \"production\") {\n  (function() {\n'use strict';\n\nvar React = require('react');\nvar _assign = require('object-assign');\nvar Scheduler = require('scheduler');\nvar tracing = require('scheduler/tracing');\n\nvar ReactSharedInternals = React.__SECRET_INTERNALS_DO_NOT_USE_OR_YOU_WILL_BE_FIRED;\n\n// by calls to these methods by a Babel plugin.\n//\n// In PROD (or in packages without access to React internals),\n// they are left as they are instead.\n\nfunction warn(format) {\n  {\n    for (var _len = arguments.length, args = new Array(_len > 1 ? _len - 1 : 0), _key = 1; _key < _len; _key++) {\n      args[_key - 1] = arguments[_key];\n    }\n\n    printWarning('warn', format, args);\n  }\n}\nfunction error(format) {\n  {\n    for (var _len2 = arguments.length, args = new Array(_len2 > 1 ? _len2 - 1 : 0), _key2 = 1; _key2 < _len2; _key2++) {\n      args[_key2 - 1] = arguments[_key2];\n    }\n\n    printWarning('error', format, args);\n  }\n}\n\nfunction printWarning(level, format, args) {\n  // When changing this logic, you might want to also\n  // update consoleWithStackDev.www.js as well.\n  {\n    var ReactDebugCurrentFrame = ReactSharedInternals.ReactDebugCurrentFrame;\n    var stack = ReactDebugCurrentFrame.getStackAddendum();\n\n    if (stack !== '') {\n      format += '%s';\n      args = args.concat([stack]);\n    }\n\n    var argsWithFormat = args.map(function (item) {\n      return '' + item;\n    }); // Careful: RN currently depends on this prefix\n\n    argsWithFormat.unshift('Warning: ' + format); // We intentionally don't use spread (or .apply) directly because it\n    // breaks IE9: https://github.com/facebook/react/issues/13610\n    // eslint-disable-next-line react-internal/no-production-logging\n\n    Function.prototype.apply.call(console[level], console, argsWithFormat);\n  }\n}\n\nif (!React) {\n  {\n    throw Error( \"ReactDOM was loaded before React. Make sure you load the React package before loading ReactDOM.\" );\n  }\n}\n\nvar FunctionComponent = 0;\nvar ClassComponent = 1;\nvar IndeterminateComponent = 2; // Before we know whether it is function or class\n\nvar HostRoot = 3; // Root of a host tree. Could be nested inside another node.\n\nvar HostPortal = 4; // A subtree. Could be an entry point to a different renderer.\n\nvar HostComponent = 5;\nvar HostText = 6;\nvar Fragment = 7;\nvar Mode = 8;\nvar ContextConsumer = 9;\nvar ContextProvider = 10;\nvar ForwardRef = 11;\nvar Profiler = 12;\nvar SuspenseComponent = 13;\nvar MemoComponent = 14;\nvar SimpleMemoComponent = 15;\nvar LazyComponent = 16;\nvar IncompleteClassComponent = 17;\nvar DehydratedFragment = 18;\nvar SuspenseListComponent = 19;\nvar FundamentalComponent = 20;\nvar ScopeComponent = 21;\nvar Block = 22;\nvar OffscreenComponent = 23;\nvar LegacyHiddenComponent = 24;\n\n// Filter certain DOM attributes (e.g. src, href) if their values are empty strings.\n\nvar enableProfilerTimer = true; // Record durations for commit and passive effects phases.\n\nvar enableFundamentalAPI = false; // Experimental Scope support.\nvar enableNewReconciler = false; // Errors that are thrown while unmounting (or after in the case of passive effects)\nvar warnAboutStringRefs = false;\n\nvar allNativeEvents = new Set();\n/**\n * Mapping from registration name to event name\n */\n\n\nvar registrationNameDependencies = {};\n/**\n * Mapping from lowercase registration names to the properly cased version,\n * used to warn in the case of missing event handlers. Available\n * only in true.\n * @type {Object}\n */\n\nvar possibleRegistrationNames =  {} ; // Trust the developer to only use possibleRegistrationNames in true\n\nfunction registerTwoPhaseEvent(registrationName, dependencies) {\n  registerDirectEvent(registrationName, dependencies);\n  registerDirectEvent(registrationName + 'Capture', dependencies);\n}\nfunction registerDirectEvent(registrationName, dependencies) {\n  {\n    if (registrationNameDependencies[registrationName]) {\n      error('EventRegistry: More than one plugin attempted to publish the same ' + 'registration name, `%s`.', registrationName);\n    }\n  }\n\n  registrationNameDependencies[registrationName] = dependencies;\n\n  {\n    var lowerCasedName = registrationName.toLowerCase();\n    possibleRegistrationNames[lowerCasedName] = registrationName;\n\n    if (registrationName === 'onDoubleClick') {\n      possibleRegistrationNames.ondblclick = registrationName;\n    }\n  }\n\n  for (var i = 0; i < dependencies.length; i++) {\n    allNativeEvents.add(dependencies[i]);\n  }\n}\n\nvar canUseDOM = !!(typeof window !== 'undefined' && typeof window.document !== 'undefined' && typeof window.document.createElement !== 'undefined');\n\n// A reserved attribute.\n// It is handled by React separately and shouldn't be written to the DOM.\nvar RESERVED = 0; // A simple string attribute.\n// Attributes that aren't in the filter are presumed to have this type.\n\nvar STRING = 1; // A string attribute that accepts booleans in React. In HTML, these are called\n// \"enumerated\" attributes with \"true\" and \"false\" as possible values.\n// When true, it should be set to a \"true\" string.\n// When false, it should be set to a \"false\" string.\n\nvar BOOLEANISH_STRING = 2; // A real boolean attribute.\n// When true, it should be present (set either to an empty string or its name).\n// When false, it should be omitted.\n\nvar BOOLEAN = 3; // An attribute that can be used as a flag as well as with a value.\n// When true, it should be present (set either to an empty string or its name).\n// When false, it should be omitted.\n// For any other value, should be present with that value.\n\nvar OVERLOADED_BOOLEAN = 4; // An attribute that must be numeric or parse as a numeric.\n// When falsy, it should be removed.\n\nvar NUMERIC = 5; // An attribute that must be positive numeric or parse as a positive numeric.\n// When falsy, it should be removed.\n\nvar POSITIVE_NUMERIC = 6;\n\n/* eslint-disable max-len */\nvar ATTRIBUTE_NAME_START_CHAR = \":A-Z_a-z\\\\u00C0-\\\\u00D6\\\\u00D8-\\\\u00F6\\\\u00F8-\\\\u02FF\\\\u0370-\\\\u037D\\\\u037F-\\\\u1FFF\\\\u200C-\\\\u200D\\\\u2070-\\\\u218F\\\\u2C00-\\\\u2FEF\\\\u3001-\\\\uD7FF\\\\uF900-\\\\uFDCF\\\\uFDF0-\\\\uFFFD\";\n/* eslint-enable max-len */\n\nvar ATTRIBUTE_NAME_CHAR = ATTRIBUTE_NAME_START_CHAR + \"\\\\-.0-9\\\\u00B7\\\\u0300-\\\\u036F\\\\u203F-\\\\u2040\";\nvar ROOT_ATTRIBUTE_NAME = 'data-reactroot';\nvar VALID_ATTRIBUTE_NAME_REGEX = new RegExp('^[' + ATTRIBUTE_NAME_START_CHAR + '][' + ATTRIBUTE_NAME_CHAR + ']*$');\nvar hasOwnProperty = Object.prototype.hasOwnProperty;\nvar illegalAttributeNameCache = {};\nvar validatedAttributeNameCache = {};\nfunction isAttributeNameSafe(attributeName) {\n  if (hasOwnProperty.call(validatedAttributeNameCache, attributeName)) {\n    return true;\n  }\n\n  if (hasOwnProperty.call(illegalAttributeNameCache, attributeName)) {\n    return false;\n  }\n\n  if (VALID_ATTRIBUTE_NAME_REGEX.test(attributeName)) {\n    validatedAttributeNameCache[attributeName] = true;\n    return true;\n  }\n\n  illegalAttributeNameCache[attributeName] = true;\n\n  {\n    error('Invalid attribute name: `%s`', attributeName);\n  }\n\n  return false;\n}\nfunction shouldIgnoreAttribute(name, propertyInfo, isCustomComponentTag) {\n  if (propertyInfo !== null) {\n    return propertyInfo.type === RESERVED;\n  }\n\n  if (isCustomComponentTag) {\n    return false;\n  }\n\n  if (name.length > 2 && (name[0] === 'o' || name[0] === 'O') && (name[1] === 'n' || name[1] === 'N')) {\n    return true;\n  }\n\n  return false;\n}\nfunction shouldRemoveAttributeWithWarning(name, value, propertyInfo, isCustomComponentTag) {\n  if (propertyInfo !== null && propertyInfo.type === RESERVED) {\n    return false;\n  }\n\n  switch (typeof value) {\n    case 'function': // $FlowIssue symbol is perfectly valid here\n\n    case 'symbol':\n      // eslint-disable-line\n      return true;\n\n    case 'boolean':\n      {\n        if (isCustomComponentTag) {\n          return false;\n        }\n\n        if (propertyInfo !== null) {\n          return !propertyInfo.acceptsBooleans;\n        } else {\n          var prefix = name.toLowerCase().slice(0, 5);\n          return prefix !== 'data-' && prefix !== 'aria-';\n        }\n      }\n\n    default:\n      return false;\n  }\n}\nfunction shouldRemoveAttribute(name, value, propertyInfo, isCustomComponentTag) {\n  if (value === null || typeof value === 'undefined') {\n    return true;\n  }\n\n  if (shouldRemoveAttributeWithWarning(name, value, propertyInfo, isCustomComponentTag)) {\n    return true;\n  }\n\n  if (isCustomComponentTag) {\n    return false;\n  }\n\n  if (propertyInfo !== null) {\n\n    switch (propertyInfo.type) {\n      case BOOLEAN:\n        return !value;\n\n      case OVERLOADED_BOOLEAN:\n        return value === false;\n\n      case NUMERIC:\n        return isNaN(value);\n\n      case POSITIVE_NUMERIC:\n        return isNaN(value) || value < 1;\n    }\n  }\n\n  return false;\n}\nfunction getPropertyInfo(name) {\n  return properties.hasOwnProperty(name) ? properties[name] : null;\n}\n\nfunction PropertyInfoRecord(name, type, mustUseProperty, attributeName, attributeNamespace, sanitizeURL, removeEmptyString) {\n  this.acceptsBooleans = type === BOOLEANISH_STRING || type === BOOLEAN || type === OVERLOADED_BOOLEAN;\n  this.attributeName = attributeName;\n  this.attributeNamespace = attributeNamespace;\n  this.mustUseProperty = mustUseProperty;\n  this.propertyName = name;\n  this.type = type;\n  this.sanitizeURL = sanitizeURL;\n  this.removeEmptyString = removeEmptyString;\n} // When adding attributes to this list, be sure to also add them to\n// the `possibleStandardNames` module to ensure casing and incorrect\n// name warnings.\n\n\nvar properties = {}; // These props are reserved by React. They shouldn't be written to the DOM.\n\nvar reservedProps = ['children', 'dangerouslySetInnerHTML', // TODO: This prevents the assignment of defaultValue to regular\n// elements (not just inputs). Now that ReactDOMInput assigns to the\n// defaultValue property -- do we need this?\n'defaultValue', 'defaultChecked', 'innerHTML', 'suppressContentEditableWarning', 'suppressHydrationWarning', 'style'];\nreservedProps.forEach(function (name) {\n  properties[name] = new PropertyInfoRecord(name, RESERVED, false, // mustUseProperty\n  name, // attributeName\n  null, // attributeNamespace\n  false, // sanitizeURL\n  false);\n}); // A few React string attributes have a different name.\n// This is a mapping from React prop names to the attribute names.\n\n[['acceptCharset', 'accept-charset'], ['className', 'class'], ['htmlFor', 'for'], ['httpEquiv', 'http-equiv']].forEach(function (_ref) {\n  var name = _ref[0],\n      attributeName = _ref[1];\n  properties[name] = new PropertyInfoRecord(name, STRING, false, // mustUseProperty\n  attributeName, // attributeName\n  null, // attributeNamespace\n  false, // sanitizeURL\n  false);\n}); // These are \"enumerated\" HTML attributes that accept \"true\" and \"false\".\n// In React, we let users pass `true` and `false` even though technically\n// these aren't boolean attributes (they are coerced to strings).\n\n['contentEditable', 'draggable', 'spellCheck', 'value'].forEach(function (name) {\n  properties[name] = new PropertyInfoRecord(name, BOOLEANISH_STRING, false, // mustUseProperty\n  name.toLowerCase(), // attributeName\n  null, // attributeNamespace\n  false, // sanitizeURL\n  false);\n}); // These are \"enumerated\" SVG attributes that accept \"true\" and \"false\".\n// In React, we let users pass `true` and `false` even though technically\n// these aren't boolean attributes (they are coerced to strings).\n// Since these are SVG attributes, their attribute names are case-sensitive.\n\n['autoReverse', 'externalResourcesRequired', 'focusable', 'preserveAlpha'].forEach(function (name) {\n  properties[name] = new PropertyInfoRecord(name, BOOLEANISH_STRING, false, // mustUseProperty\n  name, // attributeName\n  null, // attributeNamespace\n  false, // sanitizeURL\n  false);\n}); // These are HTML boolean attributes.\n\n['allowFullScreen', 'async', // Note: there is a special case that prevents it from being written to the DOM\n// on the client side because the browsers are inconsistent. Instead we call focus().\n'autoFocus', 'autoPlay', 'controls', 'default', 'defer', 'disabled', 'disablePictureInPicture', 'disableRemotePlayback', 'formNoValidate', 'hidden', 'loop', 'noModule', 'noValidate', 'open', 'playsInline', 'readOnly', 'required', 'reversed', 'scoped', 'seamless', // Microdata\n'itemScope'].forEach(function (name) {\n  properties[name] = new PropertyInfoRecord(name, BOOLEAN, false, // mustUseProperty\n  name.toLowerCase(), // attributeName\n  null, // attributeNamespace\n  false, // sanitizeURL\n  false);\n}); // These are the few React props that we set as DOM properties\n// rather than attributes. These are all booleans.\n\n['checked', // Note: `option.selected` is not updated if `select.multiple` is\n// disabled with `removeAttribute`. We have special logic for handling this.\n'multiple', 'muted', 'selected' // NOTE: if you add a camelCased prop to this list,\n// you'll need to set attributeName to name.toLowerCase()\n// instead in the assignment below.\n].forEach(function (name) {\n  properties[name] = new PropertyInfoRecord(name, BOOLEAN, true, // mustUseProperty\n  name, // attributeName\n  null, // attributeNamespace\n  false, // sanitizeURL\n  false);\n}); // These are HTML attributes that are \"overloaded booleans\": they behave like\n// booleans, but can also accept a string value.\n\n['capture', 'download' // NOTE: if you add a camelCased prop to this list,\n// you'll need to set attributeName to name.toLowerCase()\n// instead in the assignment below.\n].forEach(function (name) {\n  properties[name] = new PropertyInfoRecord(name, OVERLOADED_BOOLEAN, false, // mustUseProperty\n  name, // attributeName\n  null, // attributeNamespace\n  false, // sanitizeURL\n  false);\n}); // These are HTML attributes that must be positive numbers.\n\n['cols', 'rows', 'size', 'span' // NOTE: if you add a camelCased prop to this list,\n// you'll need to set attributeName to name.toLowerCase()\n// instead in the assignment below.\n].forEach(function (name) {\n  properties[name] = new PropertyInfoRecord(name, POSITIVE_NUMERIC, false, // mustUseProperty\n  name, // attributeName\n  null, // attributeNamespace\n  false, // sanitizeURL\n  false);\n}); // These are HTML attributes that must be numbers.\n\n['rowSpan', 'start'].forEach(function (name) {\n  properties[name] = new PropertyInfoRecord(name, NUMERIC, false, // mustUseProperty\n  name.toLowerCase(), // attributeName\n  null, // attributeNamespace\n  false, // sanitizeURL\n  false);\n});\nvar CAMELIZE = /[\\-\\:]([a-z])/g;\n\nvar capitalize = function (token) {\n  return token[1].toUpperCase();\n}; // This is a list of all SVG attributes that need special casing, namespacing,\n// or boolean value assignment. Regular attributes that just accept strings\n// and have the same names are omitted, just like in the HTML attribute filter.\n// Some of these attributes can be hard to find. This list was created by\n// scraping the MDN documentation.\n\n\n['accent-height', 'alignment-baseline', 'arabic-form', 'baseline-shift', 'cap-height', 'clip-path', 'clip-rule', 'color-interpolation', 'color-interpolation-filters', 'color-profile', 'color-rendering', 'dominant-baseline', 'enable-background', 'fill-opacity', 'fill-rule', 'flood-color', 'flood-opacity', 'font-family', 'font-size', 'font-size-adjust', 'font-stretch', 'font-style', 'font-variant', 'font-weight', 'glyph-name', 'glyph-orientation-horizontal', 'glyph-orientation-vertical', 'horiz-adv-x', 'horiz-origin-x', 'image-rendering', 'letter-spacing', 'lighting-color', 'marker-end', 'marker-mid', 'marker-start', 'overline-position', 'overline-thickness', 'paint-order', 'panose-1', 'pointer-events', 'rendering-intent', 'shape-rendering', 'stop-color', 'stop-opacity', 'strikethrough-position', 'strikethrough-thickness', 'stroke-dasharray', 'stroke-dashoffset', 'stroke-linecap', 'stroke-linejoin', 'stroke-miterlimit', 'stroke-opacity', 'stroke-width', 'text-anchor', 'text-decoration', 'text-rendering', 'underline-position', 'underline-thickness', 'unicode-bidi', 'unicode-range', 'units-per-em', 'v-alphabetic', 'v-hanging', 'v-ideographic', 'v-mathematical', 'vector-effect', 'vert-adv-y', 'vert-origin-x', 'vert-origin-y', 'word-spacing', 'writing-mode', 'xmlns:xlink', 'x-height' // NOTE: if you add a camelCased prop to this list,\n// you'll need to set attributeName to name.toLowerCase()\n// instead in the assignment below.\n].forEach(function (attributeName) {\n  var name = attributeName.replace(CAMELIZE, capitalize);\n  properties[name] = new PropertyInfoRecord(name, STRING, false, // mustUseProperty\n  attributeName, null, // attributeNamespace\n  false, // sanitizeURL\n  false);\n}); // String SVG attributes with the xlink namespace.\n\n['xlink:actuate', 'xlink:arcrole', 'xlink:role', 'xlink:show', 'xlink:title', 'xlink:type' // NOTE: if you add a camelCased prop to this list,\n// you'll need to set attributeName to name.toLowerCase()\n// instead in the assignment below.\n].forEach(function (attributeName) {\n  var name = attributeName.replace(CAMELIZE, capitalize);\n  properties[name] = new PropertyInfoRecord(name, STRING, false, // mustUseProperty\n  attributeName, 'http://www.w3.org/1999/xlink', false, // sanitizeURL\n  false);\n}); // String SVG attributes with the xml namespace.\n\n['xml:base', 'xml:lang', 'xml:space' // NOTE: if you add a camelCased prop to this list,\n// you'll need to set attributeName to name.toLowerCase()\n// instead in the assignment below.\n].forEach(function (attributeName) {\n  var name = attributeName.replace(CAMELIZE, capitalize);\n  properties[name] = new PropertyInfoRecord(name, STRING, false, // mustUseProperty\n  attributeName, 'http://www.w3.org/XML/1998/namespace', false, // sanitizeURL\n  false);\n}); // These attribute exists both in HTML and SVG.\n// The attribute name is case-sensitive in SVG so we can't just use\n// the React name like we do for attributes that exist only in HTML.\n\n['tabIndex', 'crossOrigin'].forEach(function (attributeName) {\n  properties[attributeName] = new PropertyInfoRecord(attributeName, STRING, false, // mustUseProperty\n  attributeName.toLowerCase(), // attributeName\n  null, // attributeNamespace\n  false, // sanitizeURL\n  false);\n}); // These attributes accept URLs. These must not allow javascript: URLS.\n// These will also need to accept Trusted Types object in the future.\n\nvar xlinkHref = 'xlinkHref';\nproperties[xlinkHref] = new PropertyInfoRecord('xlinkHref', STRING, false, // mustUseProperty\n'xlink:href', 'http://www.w3.org/1999/xlink', true, // sanitizeURL\nfalse);\n['src', 'href', 'action', 'formAction'].forEach(function (attributeName) {\n  properties[attributeName] = new PropertyInfoRecord(attributeName, STRING, false, // mustUseProperty\n  attributeName.toLowerCase(), // attributeName\n  null, // attributeNamespace\n  true, // sanitizeURL\n  true);\n});\n\n// and any newline or tab are filtered out as if they're not part of the URL.\n// https://url.spec.whatwg.org/#url-parsing\n// Tab or newline are defined as \\r\\n\\t:\n// https://infra.spec.whatwg.org/#ascii-tab-or-newline\n// A C0 control is a code point in the range \\u0000 NULL to \\u001F\n// INFORMATION SEPARATOR ONE, inclusive:\n// https://infra.spec.whatwg.org/#c0-control-or-space\n\n/* eslint-disable max-len */\n\nvar isJavaScriptProtocol = /^[\\u0000-\\u001F ]*j[\\r\\n\\t]*a[\\r\\n\\t]*v[\\r\\n\\t]*a[\\r\\n\\t]*s[\\r\\n\\t]*c[\\r\\n\\t]*r[\\r\\n\\t]*i[\\r\\n\\t]*p[\\r\\n\\t]*t[\\r\\n\\t]*\\:/i;\nvar didWarn = false;\n\nfunction sanitizeURL(url) {\n  {\n    if (!didWarn && isJavaScriptProtocol.test(url)) {\n      didWarn = true;\n\n      error('A future version of React will block javascript: URLs as a security precaution. ' + 'Use event handlers instead if you can. If you need to generate unsafe HTML try ' + 'using dangerouslySetInnerHTML instead. React was passed %s.', JSON.stringify(url));\n    }\n  }\n}\n\n/**\n * Get the value for a property on a node. Only used in DEV for SSR validation.\n * The \"expected\" argument is used as a hint of what the expected value is.\n * Some properties have multiple equivalent values.\n */\nfunction getValueForProperty(node, name, expected, propertyInfo) {\n  {\n    if (propertyInfo.mustUseProperty) {\n      var propertyName = propertyInfo.propertyName;\n      return node[propertyName];\n    } else {\n      if ( propertyInfo.sanitizeURL) {\n        // If we haven't fully disabled javascript: URLs, and if\n        // the hydration is successful of a javascript: URL, we\n        // still want to warn on the client.\n        sanitizeURL('' + expected);\n      }\n\n      var attributeName = propertyInfo.attributeName;\n      var stringValue = null;\n\n      if (propertyInfo.type === OVERLOADED_BOOLEAN) {\n        if (node.hasAttribute(attributeName)) {\n          var value = node.getAttribute(attributeName);\n\n          if (value === '') {\n            return true;\n          }\n\n          if (shouldRemoveAttribute(name, expected, propertyInfo, false)) {\n            return value;\n          }\n\n          if (value === '' + expected) {\n            return expected;\n          }\n\n          return value;\n        }\n      } else if (node.hasAttribute(attributeName)) {\n        if (shouldRemoveAttribute(name, expected, propertyInfo, false)) {\n          // We had an attribute but shouldn't have had one, so read it\n          // for the error message.\n          return node.getAttribute(attributeName);\n        }\n\n        if (propertyInfo.type === BOOLEAN) {\n          // If this was a boolean, it doesn't matter what the value is\n          // the fact that we have it is the same as the expected.\n          return expected;\n        } // Even if this property uses a namespace we use getAttribute\n        // because we assume its namespaced name is the same as our config.\n        // To use getAttributeNS we need the local name which we don't have\n        // in our config atm.\n\n\n        stringValue = node.getAttribute(attributeName);\n      }\n\n      if (shouldRemoveAttribute(name, expected, propertyInfo, false)) {\n        return stringValue === null ? expected : stringValue;\n      } else if (stringValue === '' + expected) {\n        return expected;\n      } else {\n        return stringValue;\n      }\n    }\n  }\n}\n/**\n * Get the value for a attribute on a node. Only used in DEV for SSR validation.\n * The third argument is used as a hint of what the expected value is. Some\n * attributes have multiple equivalent values.\n */\n\nfunction getValueForAttribute(node, name, expected) {\n  {\n    if (!isAttributeNameSafe(name)) {\n      return;\n    } // If the object is an opaque reference ID, it's expected that\n    // the next prop is different than the server value, so just return\n    // expected\n\n\n    if (isOpaqueHydratingObject(expected)) {\n      return expected;\n    }\n\n    if (!node.hasAttribute(name)) {\n      return expected === undefined ? undefined : null;\n    }\n\n    var value = node.getAttribute(name);\n\n    if (value === '' + expected) {\n      return expected;\n    }\n\n    return value;\n  }\n}\n/**\n * Sets the value for a property on a node.\n *\n * @param {DOMElement} node\n * @param {string} name\n * @param {*} value\n */\n\nfunction setValueForProperty(node, name, value, isCustomComponentTag) {\n  var propertyInfo = getPropertyInfo(name);\n\n  if (shouldIgnoreAttribute(name, propertyInfo, isCustomComponentTag)) {\n    return;\n  }\n\n  if (shouldRemoveAttribute(name, value, propertyInfo, isCustomComponentTag)) {\n    value = null;\n  } // If the prop isn't in the special list, treat it as a simple attribute.\n\n\n  if (isCustomComponentTag || propertyInfo === null) {\n    if (isAttributeNameSafe(name)) {\n      var _attributeName = name;\n\n      if (value === null) {\n        node.removeAttribute(_attributeName);\n      } else {\n        node.setAttribute(_attributeName,  '' + value);\n      }\n    }\n\n    return;\n  }\n\n  var mustUseProperty = propertyInfo.mustUseProperty;\n\n  if (mustUseProperty) {\n    var propertyName = propertyInfo.propertyName;\n\n    if (value === null) {\n      var type = propertyInfo.type;\n      node[propertyName] = type === BOOLEAN ? false : '';\n    } else {\n      // Contrary to `setAttribute`, object properties are properly\n      // `toString`ed by IE8/9.\n      node[propertyName] = value;\n    }\n\n    return;\n  } // The rest are treated as attributes with special cases.\n\n\n  var attributeName = propertyInfo.attributeName,\n      attributeNamespace = propertyInfo.attributeNamespace;\n\n  if (value === null) {\n    node.removeAttribute(attributeName);\n  } else {\n    var _type = propertyInfo.type;\n    var attributeValue;\n\n    if (_type === BOOLEAN || _type === OVERLOADED_BOOLEAN && value === true) {\n      // If attribute type is boolean, we know for sure it won't be an execution sink\n      // and we won't require Trusted Type here.\n      attributeValue = '';\n    } else {\n      // `setAttribute` with objects becomes only `[object]` in IE8/9,\n      // ('' + value) makes it output the correct toString()-value.\n      {\n        attributeValue = '' + value;\n      }\n\n      if (propertyInfo.sanitizeURL) {\n        sanitizeURL(attributeValue.toString());\n      }\n    }\n\n    if (attributeNamespace) {\n      node.setAttributeNS(attributeNamespace, attributeName, attributeValue);\n    } else {\n      node.setAttribute(attributeName, attributeValue);\n    }\n  }\n}\n\n// ATTENTION\n// When adding new symbols to this file,\n// Please consider also adding to 'react-devtools-shared/src/backend/ReactSymbols'\n// The Symbol used to tag the ReactElement-like types. If there is no native Symbol\n// nor polyfill, then a plain number is used for performance.\nvar REACT_ELEMENT_TYPE = 0xeac7;\nvar REACT_PORTAL_TYPE = 0xeaca;\nvar REACT_FRAGMENT_TYPE = 0xeacb;\nvar REACT_STRICT_MODE_TYPE = 0xeacc;\nvar REACT_PROFILER_TYPE = 0xead2;\nvar REACT_PROVIDER_TYPE = 0xeacd;\nvar REACT_CONTEXT_TYPE = 0xeace;\nvar REACT_FORWARD_REF_TYPE = 0xead0;\nvar REACT_SUSPENSE_TYPE = 0xead1;\nvar REACT_SUSPENSE_LIST_TYPE = 0xead8;\nvar REACT_MEMO_TYPE = 0xead3;\nvar REACT_LAZY_TYPE = 0xead4;\nvar REACT_BLOCK_TYPE = 0xead9;\nvar REACT_SERVER_BLOCK_TYPE = 0xeada;\nvar REACT_FUNDAMENTAL_TYPE = 0xead5;\nvar REACT_SCOPE_TYPE = 0xead7;\nvar REACT_OPAQUE_ID_TYPE = 0xeae0;\nvar REACT_DEBUG_TRACING_MODE_TYPE = 0xeae1;\nvar REACT_OFFSCREEN_TYPE = 0xeae2;\nvar REACT_LEGACY_HIDDEN_TYPE = 0xeae3;\n\nif (typeof Symbol === 'function' && Symbol.for) {\n  var symbolFor = Symbol.for;\n  REACT_ELEMENT_TYPE = symbolFor('react.element');\n  REACT_PORTAL_TYPE = symbolFor('react.portal');\n  REACT_FRAGMENT_TYPE = symbolFor('react.fragment');\n  REACT_STRICT_MODE_TYPE = symbolFor('react.strict_mode');\n  REACT_PROFILER_TYPE = symbolFor('react.profiler');\n  REACT_PROVIDER_TYPE = symbolFor('react.provider');\n  REACT_CONTEXT_TYPE = symbolFor('react.context');\n  REACT_FORWARD_REF_TYPE = symbolFor('react.forward_ref');\n  REACT_SUSPENSE_TYPE = symbolFor('react.suspense');\n  REACT_SUSPENSE_LIST_TYPE = symbolFor('react.suspense_list');\n  REACT_MEMO_TYPE = symbolFor('react.memo');\n  REACT_LAZY_TYPE = symbolFor('react.lazy');\n  REACT_BLOCK_TYPE = symbolFor('react.block');\n  REACT_SERVER_BLOCK_TYPE = symbolFor('react.server.block');\n  REACT_FUNDAMENTAL_TYPE = symbolFor('react.fundamental');\n  REACT_SCOPE_TYPE = symbolFor('react.scope');\n  REACT_OPAQUE_ID_TYPE = symbolFor('react.opaque.id');\n  REACT_DEBUG_TRACING_MODE_TYPE = symbolFor('react.debug_trace_mode');\n  REACT_OFFSCREEN_TYPE = symbolFor('react.offscreen');\n  REACT_LEGACY_HIDDEN_TYPE = symbolFor('react.legacy_hidden');\n}\n\nvar MAYBE_ITERATOR_SYMBOL = typeof Symbol === 'function' && Symbol.iterator;\nvar FAUX_ITERATOR_SYMBOL = '@@iterator';\nfunction getIteratorFn(maybeIterable) {\n  if (maybeIterable === null || typeof maybeIterable !== 'object') {\n    return null;\n  }\n\n  var maybeIterator = MAYBE_ITERATOR_SYMBOL && maybeIterable[MAYBE_ITERATOR_SYMBOL] || maybeIterable[FAUX_ITERATOR_SYMBOL];\n\n  if (typeof maybeIterator === 'function') {\n    return maybeIterator;\n  }\n\n  return null;\n}\n\n// Helpers to patch console.logs to avoid logging during side-effect free\n// replaying on render function. This currently only patches the object\n// lazily which won't cover if the log function was extracted eagerly.\n// We could also eagerly patch the method.\nvar disabledDepth = 0;\nvar prevLog;\nvar prevInfo;\nvar prevWarn;\nvar prevError;\nvar prevGroup;\nvar prevGroupCollapsed;\nvar prevGroupEnd;\n\nfunction disabledLog() {}\n\ndisabledLog.__reactDisabledLog = true;\nfunction disableLogs() {\n  {\n    if (disabledDepth === 0) {\n      /* eslint-disable react-internal/no-production-logging */\n      prevLog = console.log;\n      prevInfo = console.info;\n      prevWarn = console.warn;\n      prevError = console.error;\n      prevGroup = console.group;\n      prevGroupCollapsed = console.groupCollapsed;\n      prevGroupEnd = console.groupEnd; // https://github.com/facebook/react/issues/19099\n\n      var props = {\n        configurable: true,\n        enumerable: true,\n        value: disabledLog,\n        writable: true\n      }; // $FlowFixMe Flow thinks console is immutable.\n\n      Object.defineProperties(console, {\n        info: props,\n        log: props,\n        warn: props,\n        error: props,\n        group: props,\n        groupCollapsed: props,\n        groupEnd: props\n      });\n      /* eslint-enable react-internal/no-production-logging */\n    }\n\n    disabledDepth++;\n  }\n}\nfunction reenableLogs() {\n  {\n    disabledDepth--;\n\n    if (disabledDepth === 0) {\n      /* eslint-disable react-internal/no-production-logging */\n      var props = {\n        configurable: true,\n        enumerable: true,\n        writable: true\n      }; // $FlowFixMe Flow thinks console is immutable.\n\n      Object.defineProperties(console, {\n        log: _assign({}, props, {\n          value: prevLog\n        }),\n        info: _assign({}, props, {\n          value: prevInfo\n        }),\n        warn: _assign({}, props, {\n          value: prevWarn\n        }),\n        error: _assign({}, props, {\n          value: prevError\n        }),\n        group: _assign({}, props, {\n          value: prevGroup\n        }),\n        groupCollapsed: _assign({}, props, {\n          value: prevGroupCollapsed\n        }),\n        groupEnd: _assign({}, props, {\n          value: prevGroupEnd\n        })\n      });\n      /* eslint-enable react-internal/no-production-logging */\n    }\n\n    if (disabledDepth < 0) {\n      error('disabledDepth fell below zero. ' + 'This is a bug in React. Please file an issue.');\n    }\n  }\n}\n\nvar ReactCurrentDispatcher = ReactSharedInternals.ReactCurrentDispatcher;\nvar prefix;\nfunction describeBuiltInComponentFrame(name, source, ownerFn) {\n  {\n    if (prefix === undefined) {\n      // Extract the VM specific prefix used by each line.\n      try {\n        throw Error();\n      } catch (x) {\n        var match = x.stack.trim().match(/\\n( *(at )?)/);\n        prefix = match && match[1] || '';\n      }\n    } // We use the prefix to ensure our stacks line up with native stack frames.\n\n\n    return '\\n' + prefix + name;\n  }\n}\nvar reentry = false;\nvar componentFrameCache;\n\n{\n  var PossiblyWeakMap = typeof WeakMap === 'function' ? WeakMap : Map;\n  componentFrameCache = new PossiblyWeakMap();\n}\n\nfunction describeNativeComponentFrame(fn, construct) {\n  // If something asked for a stack inside a fake render, it should get ignored.\n  if (!fn || reentry) {\n    return '';\n  }\n\n  {\n    var frame = componentFrameCache.get(fn);\n\n    if (frame !== undefined) {\n      return frame;\n    }\n  }\n\n  var control;\n  reentry = true;\n  var previousPrepareStackTrace = Error.prepareStackTrace; // $FlowFixMe It does accept undefined.\n\n  Error.prepareStackTrace = undefined;\n  var previousDispatcher;\n\n  {\n    previousDispatcher = ReactCurrentDispatcher.current; // Set the dispatcher in DEV because this might be call in the render function\n    // for warnings.\n\n    ReactCurrentDispatcher.current = null;\n    disableLogs();\n  }\n\n  try {\n    // This should throw.\n    if (construct) {\n      // Something should be setting the props in the constructor.\n      var Fake = function () {\n        throw Error();\n      }; // $FlowFixMe\n\n\n      Object.defineProperty(Fake.prototype, 'props', {\n        set: function () {\n          // We use a throwing setter instead of frozen or non-writable props\n          // because that won't throw in a non-strict mode function.\n          throw Error();\n        }\n      });\n\n      if (typeof Reflect === 'object' && Reflect.construct) {\n        // We construct a different control for this case to include any extra\n        // frames added by the construct call.\n        try {\n          Reflect.construct(Fake, []);\n        } catch (x) {\n          control = x;\n        }\n\n        Reflect.construct(fn, [], Fake);\n      } else {\n        try {\n          Fake.call();\n        } catch (x) {\n          control = x;\n        }\n\n        fn.call(Fake.prototype);\n      }\n    } else {\n      try {\n        throw Error();\n      } catch (x) {\n        control = x;\n      }\n\n      fn();\n    }\n  } catch (sample) {\n    // This is inlined manually because closure doesn't do it for us.\n    if (sample && control && typeof sample.stack === 'string') {\n      // This extracts the first frame from the sample that isn't also in the control.\n      // Skipping one frame that we assume is the frame that calls the two.\n      var sampleLines = sample.stack.split('\\n');\n      var controlLines = control.stack.split('\\n');\n      var s = sampleLines.length - 1;\n      var c = controlLines.length - 1;\n\n      while (s >= 1 && c >= 0 && sampleLines[s] !== controlLines[c]) {\n        // We expect at least one stack frame to be shared.\n        // Typically this will be the root most one. However, stack frames may be\n        // cut off due to maximum stack limits. In this case, one maybe cut off\n        // earlier than the other. We assume that the sample is longer or the same\n        // and there for cut off earlier. So we should find the root most frame in\n        // the sample somewhere in the control.\n        c--;\n      }\n\n      for (; s >= 1 && c >= 0; s--, c--) {\n        // Next we find the first one that isn't the same which should be the\n        // frame that called our sample function and the control.\n        if (sampleLines[s] !== controlLines[c]) {\n          // In V8, the first line is describing the message but other VMs don't.\n          // If we're about to return the first line, and the control is also on the same\n          // line, that's a pretty good indicator that our sample threw at same line as\n          // the control. I.e. before we entered the sample frame. So we ignore this result.\n          // This can happen if you passed a class to function component, or non-function.\n          if (s !== 1 || c !== 1) {\n            do {\n              s--;\n              c--; // We may still have similar intermediate frames from the construct call.\n              // The next one that isn't the same should be our match though.\n\n              if (c < 0 || sampleLines[s] !== controlLines[c]) {\n                // V8 adds a \"new\" prefix for native classes. Let's remove it to make it prettier.\n                var _frame = '\\n' + sampleLines[s].replace(' at new ', ' at ');\n\n                {\n                  if (typeof fn === 'function') {\n                    componentFrameCache.set(fn, _frame);\n                  }\n                } // Return the line we found.\n\n\n                return _frame;\n              }\n            } while (s >= 1 && c >= 0);\n          }\n\n          break;\n        }\n      }\n    }\n  } finally {\n    reentry = false;\n\n    {\n      ReactCurrentDispatcher.current = previousDispatcher;\n      reenableLogs();\n    }\n\n    Error.prepareStackTrace = previousPrepareStackTrace;\n  } // Fallback to just using the name if we couldn't make it throw.\n\n\n  var name = fn ? fn.displayName || fn.name : '';\n  var syntheticFrame = name ? describeBuiltInComponentFrame(name) : '';\n\n  {\n    if (typeof fn === 'function') {\n      componentFrameCache.set(fn, syntheticFrame);\n    }\n  }\n\n  return syntheticFrame;\n}\n\nfunction describeClassComponentFrame(ctor, source, ownerFn) {\n  {\n    return describeNativeComponentFrame(ctor, true);\n  }\n}\nfunction describeFunctionComponentFrame(fn, source, ownerFn) {\n  {\n    return describeNativeComponentFrame(fn, false);\n  }\n}\n\nfunction shouldConstruct(Component) {\n  var prototype = Component.prototype;\n  return !!(prototype && prototype.isReactComponent);\n}\n\nfunction describeUnknownElementTypeFrameInDEV(type, source, ownerFn) {\n\n  if (type == null) {\n    return '';\n  }\n\n  if (typeof type === 'function') {\n    {\n      return describeNativeComponentFrame(type, shouldConstruct(type));\n    }\n  }\n\n  if (typeof type === 'string') {\n    return describeBuiltInComponentFrame(type);\n  }\n\n  switch (type) {\n    case REACT_SUSPENSE_TYPE:\n      return describeBuiltInComponentFrame('Suspense');\n\n    case REACT_SUSPENSE_LIST_TYPE:\n      return describeBuiltInComponentFrame('SuspenseList');\n  }\n\n  if (typeof type === 'object') {\n    switch (type.$$typeof) {\n      case REACT_FORWARD_REF_TYPE:\n        return describeFunctionComponentFrame(type.render);\n\n      case REACT_MEMO_TYPE:\n        // Memo may contain any component type so we recursively resolve it.\n        return describeUnknownElementTypeFrameInDEV(type.type, source, ownerFn);\n\n      case REACT_BLOCK_TYPE:\n        return describeFunctionComponentFrame(type._render);\n\n      case REACT_LAZY_TYPE:\n        {\n          var lazyComponent = type;\n          var payload = lazyComponent._payload;\n          var init = lazyComponent._init;\n\n          try {\n            // Lazy may contain any component type so we recursively resolve it.\n            return describeUnknownElementTypeFrameInDEV(init(payload), source, ownerFn);\n          } catch (x) {}\n        }\n    }\n  }\n\n  return '';\n}\n\nfunction describeFiber(fiber) {\n  var owner =  fiber._debugOwner ? fiber._debugOwner.type : null ;\n  var source =  fiber._debugSource ;\n\n  switch (fiber.tag) {\n    case HostComponent:\n      return describeBuiltInComponentFrame(fiber.type);\n\n    case LazyComponent:\n      return describeBuiltInComponentFrame('Lazy');\n\n    case SuspenseComponent:\n      return describeBuiltInComponentFrame('Suspense');\n\n    case SuspenseListComponent:\n      return describeBuiltInComponentFrame('SuspenseList');\n\n    case FunctionComponent:\n    case IndeterminateComponent:\n    case SimpleMemoComponent:\n      return describeFunctionComponentFrame(fiber.type);\n\n    case ForwardRef:\n      return describeFunctionComponentFrame(fiber.type.render);\n\n    case Block:\n      return describeFunctionComponentFrame(fiber.type._render);\n\n    case ClassComponent:\n      return describeClassComponentFrame(fiber.type);\n\n    default:\n      return '';\n  }\n}\n\nfunction getStackByFiberInDevAndProd(workInProgress) {\n  try {\n    var info = '';\n    var node = workInProgress;\n\n    do {\n      info += describeFiber(node);\n      node = node.return;\n    } while (node);\n\n    return info;\n  } catch (x) {\n    return '\\nError generating stack: ' + x.message + '\\n' + x.stack;\n  }\n}\n\nfunction getWrappedName(outerType, innerType, wrapperName) {\n  var functionName = innerType.displayName || innerType.name || '';\n  return outerType.displayName || (functionName !== '' ? wrapperName + \"(\" + functionName + \")\" : wrapperName);\n}\n\nfunction getContextName(type) {\n  return type.displayName || 'Context';\n}\n\nfunction getComponentName(type) {\n  if (type == null) {\n    // Host root, text node or just invalid type.\n    return null;\n  }\n\n  {\n    if (typeof type.tag === 'number') {\n      error('Received an unexpected object in getComponentName(). ' + 'This is likely a bug in React. Please file an issue.');\n    }\n  }\n\n  if (typeof type === 'function') {\n    return type.displayName || type.name || null;\n  }\n\n  if (typeof type === 'string') {\n    return type;\n  }\n\n  switch (type) {\n    case REACT_FRAGMENT_TYPE:\n      return 'Fragment';\n\n    case REACT_PORTAL_TYPE:\n      return 'Portal';\n\n    case REACT_PROFILER_TYPE:\n      return 'Profiler';\n\n    case REACT_STRICT_MODE_TYPE:\n      return 'StrictMode';\n\n    case REACT_SUSPENSE_TYPE:\n      return 'Suspense';\n\n    case REACT_SUSPENSE_LIST_TYPE:\n      return 'SuspenseList';\n  }\n\n  if (typeof type === 'object') {\n    switch (type.$$typeof) {\n      case REACT_CONTEXT_TYPE:\n        var context = type;\n        return getContextName(context) + '.Consumer';\n\n      case REACT_PROVIDER_TYPE:\n        var provider = type;\n        return getContextName(provider._context) + '.Provider';\n\n      case REACT_FORWARD_REF_TYPE:\n        return getWrappedName(type, type.render, 'ForwardRef');\n\n      case REACT_MEMO_TYPE:\n        return getComponentName(type.type);\n\n      case REACT_BLOCK_TYPE:\n        return getComponentName(type._render);\n\n      case REACT_LAZY_TYPE:\n        {\n          var lazyComponent = type;\n          var payload = lazyComponent._payload;\n          var init = lazyComponent._init;\n\n          try {\n            return getComponentName(init(payload));\n          } catch (x) {\n            return null;\n          }\n        }\n    }\n  }\n\n  return null;\n}\n\nvar ReactDebugCurrentFrame = ReactSharedInternals.ReactDebugCurrentFrame;\nvar current = null;\nvar isRendering = false;\nfunction getCurrentFiberOwnerNameInDevOrNull() {\n  {\n    if (current === null) {\n      return null;\n    }\n\n    var owner = current._debugOwner;\n\n    if (owner !== null && typeof owner !== 'undefined') {\n      return getComponentName(owner.type);\n    }\n  }\n\n  return null;\n}\n\nfunction getCurrentFiberStackInDev() {\n  {\n    if (current === null) {\n      return '';\n    } // Safe because if current fiber exists, we are reconciling,\n    // and it is guaranteed to be the work-in-progress version.\n\n\n    return getStackByFiberInDevAndProd(current);\n  }\n}\n\nfunction resetCurrentFiber() {\n  {\n    ReactDebugCurrentFrame.getCurrentStack = null;\n    current = null;\n    isRendering = false;\n  }\n}\nfunction setCurrentFiber(fiber) {\n  {\n    ReactDebugCurrentFrame.getCurrentStack = getCurrentFiberStackInDev;\n    current = fiber;\n    isRendering = false;\n  }\n}\nfunction setIsRendering(rendering) {\n  {\n    isRendering = rendering;\n  }\n}\nfunction getIsRendering() {\n  {\n    return isRendering;\n  }\n}\n\n// Flow does not allow string concatenation of most non-string types. To work\n// around this limitation, we use an opaque type that can only be obtained by\n// passing the value through getToStringValue first.\nfunction toString(value) {\n  return '' + value;\n}\nfunction getToStringValue(value) {\n  switch (typeof value) {\n    case 'boolean':\n    case 'number':\n    case 'object':\n    case 'string':\n    case 'undefined':\n      return value;\n\n    default:\n      // function, symbol are assigned as empty strings\n      return '';\n  }\n}\n\nvar hasReadOnlyValue = {\n  button: true,\n  checkbox: true,\n  image: true,\n  hidden: true,\n  radio: true,\n  reset: true,\n  submit: true\n};\nfunction checkControlledValueProps(tagName, props) {\n  {\n    if (!(hasReadOnlyValue[props.type] || props.onChange || props.onInput || props.readOnly || props.disabled || props.value == null)) {\n      error('You provided a `value` prop to a form field without an ' + '`onChange` handler. This will render a read-only field. If ' + 'the field should be mutable use `defaultValue`. Otherwise, ' + 'set either `onChange` or `readOnly`.');\n    }\n\n    if (!(props.onChange || props.readOnly || props.disabled || props.checked == null)) {\n      error('You provided a `checked` prop to a form field without an ' + '`onChange` handler. This will render a read-only field. If ' + 'the field should be mutable use `defaultChecked`. Otherwise, ' + 'set either `onChange` or `readOnly`.');\n    }\n  }\n}\n\nfunction isCheckable(elem) {\n  var type = elem.type;\n  var nodeName = elem.nodeName;\n  return nodeName && nodeName.toLowerCase() === 'input' && (type === 'checkbox' || type === 'radio');\n}\n\nfunction getTracker(node) {\n  return node._valueTracker;\n}\n\nfunction detachTracker(node) {\n  node._valueTracker = null;\n}\n\nfunction getValueFromNode(node) {\n  var value = '';\n\n  if (!node) {\n    return value;\n  }\n\n  if (isCheckable(node)) {\n    value = node.checked ? 'true' : 'false';\n  } else {\n    value = node.value;\n  }\n\n  return value;\n}\n\nfunction trackValueOnNode(node) {\n  var valueField = isCheckable(node) ? 'checked' : 'value';\n  var descriptor = Object.getOwnPropertyDescriptor(node.constructor.prototype, valueField);\n  var currentValue = '' + node[valueField]; // if someone has already defined a value or Safari, then bail\n  // and don't track value will cause over reporting of changes,\n  // but it's better then a hard failure\n  // (needed for certain tests that spyOn input values and Safari)\n\n  if (node.hasOwnProperty(valueField) || typeof descriptor === 'undefined' || typeof descriptor.get !== 'function' || typeof descriptor.set !== 'function') {\n    return;\n  }\n\n  var get = descriptor.get,\n      set = descriptor.set;\n  Object.defineProperty(node, valueField, {\n    configurable: true,\n    get: function () {\n      return get.call(this);\n    },\n    set: function (value) {\n      currentValue = '' + value;\n      set.call(this, value);\n    }\n  }); // We could've passed this the first time\n  // but it triggers a bug in IE11 and Edge 14/15.\n  // Calling defineProperty() again should be equivalent.\n  // https://github.com/facebook/react/issues/11768\n\n  Object.defineProperty(node, valueField, {\n    enumerable: descriptor.enumerable\n  });\n  var tracker = {\n    getValue: function () {\n      return currentValue;\n    },\n    setValue: function (value) {\n      currentValue = '' + value;\n    },\n    stopTracking: function () {\n      detachTracker(node);\n      delete node[valueField];\n    }\n  };\n  return tracker;\n}\n\nfunction track(node) {\n  if (getTracker(node)) {\n    return;\n  } // TODO: Once it's just Fiber we can move this to node._wrapperState\n\n\n  node._valueTracker = trackValueOnNode(node);\n}\nfunction updateValueIfChanged(node) {\n  if (!node) {\n    return false;\n  }\n\n  var tracker = getTracker(node); // if there is no tracker at this point it's unlikely\n  // that trying again will succeed\n\n  if (!tracker) {\n    return true;\n  }\n\n  var lastValue = tracker.getValue();\n  var nextValue = getValueFromNode(node);\n\n  if (nextValue !== lastValue) {\n    tracker.setValue(nextValue);\n    return true;\n  }\n\n  return false;\n}\n\nfunction getActiveElement(doc) {\n  doc = doc || (typeof document !== 'undefined' ? document : undefined);\n\n  if (typeof doc === 'undefined') {\n    return null;\n  }\n\n  try {\n    return doc.activeElement || doc.body;\n  } catch (e) {\n    return doc.body;\n  }\n}\n\nvar didWarnValueDefaultValue = false;\nvar didWarnCheckedDefaultChecked = false;\nvar didWarnControlledToUncontrolled = false;\nvar didWarnUncontrolledToControlled = false;\n\nfunction isControlled(props) {\n  var usesChecked = props.type === 'checkbox' || props.type === 'radio';\n  return usesChecked ? props.checked != null : props.value != null;\n}\n/**\n * Implements an <input> host component that allows setting these optional\n * props: `checked`, `value`, `defaultChecked`, and `defaultValue`.\n *\n * If `checked` or `value` are not supplied (or null/undefined), user actions\n * that affect the checked state or value will trigger updates to the element.\n *\n * If they are supplied (and not null/undefined), the rendered element will not\n * trigger updates to the element. Instead, the props must change in order for\n * the rendered element to be updated.\n *\n * The rendered element will be initialized as unchecked (or `defaultChecked`)\n * with an empty value (or `defaultValue`).\n *\n * See http://www.w3.org/TR/2012/WD-html5-20121025/the-input-element.html\n */\n\n\nfunction getHostProps(element, props) {\n  var node = element;\n  var checked = props.checked;\n\n  var hostProps = _assign({}, props, {\n    defaultChecked: undefined,\n    defaultValue: undefined,\n    value: undefined,\n    checked: checked != null ? checked : node._wrapperState.initialChecked\n  });\n\n  return hostProps;\n}\nfunction initWrapperState(element, props) {\n  {\n    checkControlledValueProps('input', props);\n\n    if (props.checked !== undefined && props.defaultChecked !== undefined && !didWarnCheckedDefaultChecked) {\n      error('%s contains an input of type %s with both checked and defaultChecked props. ' + 'Input elements must be either controlled or uncontrolled ' + '(specify either the checked prop, or the defaultChecked prop, but not ' + 'both). Decide between using a controlled or uncontrolled input ' + 'element and remove one of these props. More info: ' + 'https://reactjs.org/link/controlled-components', getCurrentFiberOwnerNameInDevOrNull() || 'A component', props.type);\n\n      didWarnCheckedDefaultChecked = true;\n    }\n\n    if (props.value !== undefined && props.defaultValue !== undefined && !didWarnValueDefaultValue) {\n      error('%s contains an input of type %s with both value and defaultValue props. ' + 'Input elements must be either controlled or uncontrolled ' + '(specify either the value prop, or the defaultValue prop, but not ' + 'both). Decide between using a controlled or uncontrolled input ' + 'element and remove one of these props. More info: ' + 'https://reactjs.org/link/controlled-components', getCurrentFiberOwnerNameInDevOrNull() || 'A component', props.type);\n\n      didWarnValueDefaultValue = true;\n    }\n  }\n\n  var node = element;\n  var defaultValue = props.defaultValue == null ? '' : props.defaultValue;\n  node._wrapperState = {\n    initialChecked: props.checked != null ? props.checked : props.defaultChecked,\n    initialValue: getToStringValue(props.value != null ? props.value : defaultValue),\n    controlled: isControlled(props)\n  };\n}\nfunction updateChecked(element, props) {\n  var node = element;\n  var checked = props.checked;\n\n  if (checked != null) {\n    setValueForProperty(node, 'checked', checked, false);\n  }\n}\nfunction updateWrapper(element, props) {\n  var node = element;\n\n  {\n    var controlled = isControlled(props);\n\n    if (!node._wrapperState.controlled && controlled && !didWarnUncontrolledToControlled) {\n      error('A component is changing an uncontrolled input to be controlled. ' + 'This is likely caused by the value changing from undefined to ' + 'a defined value, which should not happen. ' + 'Decide between using a controlled or uncontrolled input ' + 'element for the lifetime of the component. More info: https://reactjs.org/link/controlled-components');\n\n      didWarnUncontrolledToControlled = true;\n    }\n\n    if (node._wrapperState.controlled && !controlled && !didWarnControlledToUncontrolled) {\n      error('A component is changing a controlled input to be uncontrolled. ' + 'This is likely caused by the value changing from a defined to ' + 'undefined, which should not happen. ' + 'Decide between using a controlled or uncontrolled input ' + 'element for the lifetime of the component. More info: https://reactjs.org/link/controlled-components');\n\n      didWarnControlledToUncontrolled = true;\n    }\n  }\n\n  updateChecked(element, props);\n  var value = getToStringValue(props.value);\n  var type = props.type;\n\n  if (value != null) {\n    if (type === 'number') {\n      if (value === 0 && node.value === '' || // We explicitly want to coerce to number here if possible.\n      // eslint-disable-next-line\n      node.value != value) {\n        node.value = toString(value);\n      }\n    } else if (node.value !== toString(value)) {\n      node.value = toString(value);\n    }\n  } else if (type === 'submit' || type === 'reset') {\n    // Submit/reset inputs need the attribute removed completely to avoid\n    // blank-text buttons.\n    node.removeAttribute('value');\n    return;\n  }\n\n  {\n    // When syncing the value attribute, the value comes from a cascade of\n    // properties:\n    //  1. The value React property\n    //  2. The defaultValue React property\n    //  3. Otherwise there should be no change\n    if (props.hasOwnProperty('value')) {\n      setDefaultValue(node, props.type, value);\n    } else if (props.hasOwnProperty('defaultValue')) {\n      setDefaultValue(node, props.type, getToStringValue(props.defaultValue));\n    }\n  }\n\n  {\n    // When syncing the checked attribute, it only changes when it needs\n    // to be removed, such as transitioning from a checkbox into a text input\n    if (props.checked == null && props.defaultChecked != null) {\n      node.defaultChecked = !!props.defaultChecked;\n    }\n  }\n}\nfunction postMountWrapper(element, props, isHydrating) {\n  var node = element; // Do not assign value if it is already set. This prevents user text input\n  // from being lost during SSR hydration.\n\n  if (props.hasOwnProperty('value') || props.hasOwnProperty('defaultValue')) {\n    var type = props.type;\n    var isButton = type === 'submit' || type === 'reset'; // Avoid setting value attribute on submit/reset inputs as it overrides the\n    // default value provided by the browser. See: #12872\n\n    if (isButton && (props.value === undefined || props.value === null)) {\n      return;\n    }\n\n    var initialValue = toString(node._wrapperState.initialValue); // Do not assign value if it is already set. This prevents user text input\n    // from being lost during SSR hydration.\n\n    if (!isHydrating) {\n      {\n        // When syncing the value attribute, the value property should use\n        // the wrapperState._initialValue property. This uses:\n        //\n        //   1. The value React property when present\n        //   2. The defaultValue React property when present\n        //   3. An empty string\n        if (initialValue !== node.value) {\n          node.value = initialValue;\n        }\n      }\n    }\n\n    {\n      // Otherwise, the value attribute is synchronized to the property,\n      // so we assign defaultValue to the same thing as the value property\n      // assignment step above.\n      node.defaultValue = initialValue;\n    }\n  } // Normally, we'd just do `node.checked = node.checked` upon initial mount, less this bug\n  // this is needed to work around a chrome bug where setting defaultChecked\n  // will sometimes influence the value of checked (even after detachment).\n  // Reference: https://bugs.chromium.org/p/chromium/issues/detail?id=608416\n  // We need to temporarily unset name to avoid disrupting radio button groups.\n\n\n  var name = node.name;\n\n  if (name !== '') {\n    node.name = '';\n  }\n\n  {\n    // When syncing the checked attribute, both the checked property and\n    // attribute are assigned at the same time using defaultChecked. This uses:\n    //\n    //   1. The checked React property when present\n    //   2. The defaultChecked React property when present\n    //   3. Otherwise, false\n    node.defaultChecked = !node.defaultChecked;\n    node.defaultChecked = !!node._wrapperState.initialChecked;\n  }\n\n  if (name !== '') {\n    node.name = name;\n  }\n}\nfunction restoreControlledState(element, props) {\n  var node = element;\n  updateWrapper(node, props);\n  updateNamedCousins(node, props);\n}\n\nfunction updateNamedCousins(rootNode, props) {\n  var name = props.name;\n\n  if (props.type === 'radio' && name != null) {\n    var queryRoot = rootNode;\n\n    while (queryRoot.parentNode) {\n      queryRoot = queryRoot.parentNode;\n    } // If `rootNode.form` was non-null, then we could try `form.elements`,\n    // but that sometimes behaves strangely in IE8. We could also try using\n    // `form.getElementsByName`, but that will only return direct children\n    // and won't include inputs that use the HTML5 `form=` attribute. Since\n    // the input might not even be in a form. It might not even be in the\n    // document. Let's just use the local `querySelectorAll` to ensure we don't\n    // miss anything.\n\n\n    var group = queryRoot.querySelectorAll('input[name=' + JSON.stringify('' + name) + '][type=\"radio\"]');\n\n    for (var i = 0; i < group.length; i++) {\n      var otherNode = group[i];\n\n      if (otherNode === rootNode || otherNode.form !== rootNode.form) {\n        continue;\n      } // This will throw if radio buttons rendered by different copies of React\n      // and the same name are rendered into the same form (same as #1939).\n      // That's probably okay; we don't support it just as we don't support\n      // mixing React radio buttons with non-React ones.\n\n\n      var otherProps = getFiberCurrentPropsFromNode(otherNode);\n\n      if (!otherProps) {\n        {\n          throw Error( \"ReactDOMInput: Mixing React and non-React radio inputs with the same `name` is not supported.\" );\n        }\n      } // We need update the tracked value on the named cousin since the value\n      // was changed but the input saw no event or value set\n\n\n      updateValueIfChanged(otherNode); // If this is a controlled radio button group, forcing the input that\n      // was previously checked to update will cause it to be come re-checked\n      // as appropriate.\n\n      updateWrapper(otherNode, otherProps);\n    }\n  }\n} // In Chrome, assigning defaultValue to certain input types triggers input validation.\n// For number inputs, the display value loses trailing decimal points. For email inputs,\n// Chrome raises \"The specified value <x> is not a valid email address\".\n//\n// Here we check to see if the defaultValue has actually changed, avoiding these problems\n// when the user is inputting text\n//\n// https://github.com/facebook/react/issues/7253\n\n\nfunction setDefaultValue(node, type, value) {\n  if ( // Focused number inputs synchronize on blur. See ChangeEventPlugin.js\n  type !== 'number' || getActiveElement(node.ownerDocument) !== node) {\n    if (value == null) {\n      node.defaultValue = toString(node._wrapperState.initialValue);\n    } else if (node.defaultValue !== toString(value)) {\n      node.defaultValue = toString(value);\n    }\n  }\n}\n\nvar didWarnSelectedSetOnOption = false;\nvar didWarnInvalidChild = false;\n\nfunction flattenChildren(children) {\n  var content = ''; // Flatten children. We'll warn if they are invalid\n  // during validateProps() which runs for hydration too.\n  // Note that this would throw on non-element objects.\n  // Elements are stringified (which is normally irrelevant\n  // but matters for <fbt>).\n\n  React.Children.forEach(children, function (child) {\n    if (child == null) {\n      return;\n    }\n\n    content += child; // Note: we don't warn about invalid children here.\n    // Instead, this is done separately below so that\n    // it happens during the hydration code path too.\n  });\n  return content;\n}\n/**\n * Implements an <option> host component that warns when `selected` is set.\n */\n\n\nfunction validateProps(element, props) {\n  {\n    // This mirrors the code path above, but runs for hydration too.\n    // Warn about invalid children here so that client and hydration are consistent.\n    // TODO: this seems like it could cause a DEV-only throw for hydration\n    // if children contains a non-element object. We should try to avoid that.\n    if (typeof props.children === 'object' && props.children !== null) {\n      React.Children.forEach(props.children, function (child) {\n        if (child == null) {\n          return;\n        }\n\n        if (typeof child === 'string' || typeof child === 'number') {\n          return;\n        }\n\n        if (typeof child.type !== 'string') {\n          return;\n        }\n\n        if (!didWarnInvalidChild) {\n          didWarnInvalidChild = true;\n\n          error('Only strings and numbers are supported as <option> children.');\n        }\n      });\n    } // TODO: Remove support for `selected` in <option>.\n\n\n    if (props.selected != null && !didWarnSelectedSetOnOption) {\n      error('Use the `defaultValue` or `value` props on <select> instead of ' + 'setting `selected` on <option>.');\n\n      didWarnSelectedSetOnOption = true;\n    }\n  }\n}\nfunction postMountWrapper$1(element, props) {\n  // value=\"\" should make a value attribute (#6219)\n  if (props.value != null) {\n    element.setAttribute('value', toString(getToStringValue(props.value)));\n  }\n}\nfunction getHostProps$1(element, props) {\n  var hostProps = _assign({\n    children: undefined\n  }, props);\n\n  var content = flattenChildren(props.children);\n\n  if (content) {\n    hostProps.children = content;\n  }\n\n  return hostProps;\n}\n\nvar didWarnValueDefaultValue$1;\n\n{\n  didWarnValueDefaultValue$1 = false;\n}\n\nfunction getDeclarationErrorAddendum() {\n  var ownerName = getCurrentFiberOwnerNameInDevOrNull();\n\n  if (ownerName) {\n    return '\\n\\nCheck the render method of `' + ownerName + '`.';\n  }\n\n  return '';\n}\n\nvar valuePropNames = ['value', 'defaultValue'];\n/**\n * Validation function for `value` and `defaultValue`.\n */\n\nfunction checkSelectPropTypes(props) {\n  {\n    checkControlledValueProps('select', props);\n\n    for (var i = 0; i < valuePropNames.length; i++) {\n      var propName = valuePropNames[i];\n\n      if (props[propName] == null) {\n        continue;\n      }\n\n      var isArray = Array.isArray(props[propName]);\n\n      if (props.multiple && !isArray) {\n        error('The `%s` prop supplied to <select> must be an array if ' + '`multiple` is true.%s', propName, getDeclarationErrorAddendum());\n      } else if (!props.multiple && isArray) {\n        error('The `%s` prop supplied to <select> must be a scalar ' + 'value if `multiple` is false.%s', propName, getDeclarationErrorAddendum());\n      }\n    }\n  }\n}\n\nfunction updateOptions(node, multiple, propValue, setDefaultSelected) {\n  var options = node.options;\n\n  if (multiple) {\n    var selectedValues = propValue;\n    var selectedValue = {};\n\n    for (var i = 0; i < selectedValues.length; i++) {\n      // Prefix to avoid chaos with special keys.\n      selectedValue['$' + selectedValues[i]] = true;\n    }\n\n    for (var _i = 0; _i < options.length; _i++) {\n      var selected = selectedValue.hasOwnProperty('$' + options[_i].value);\n\n      if (options[_i].selected !== selected) {\n        options[_i].selected = selected;\n      }\n\n      if (selected && setDefaultSelected) {\n        options[_i].defaultSelected = true;\n      }\n    }\n  } else {\n    // Do not set `select.value` as exact behavior isn't consistent across all\n    // browsers for all cases.\n    var _selectedValue = toString(getToStringValue(propValue));\n\n    var defaultSelected = null;\n\n    for (var _i2 = 0; _i2 < options.length; _i2++) {\n      if (options[_i2].value === _selectedValue) {\n        options[_i2].selected = true;\n\n        if (setDefaultSelected) {\n          options[_i2].defaultSelected = true;\n        }\n\n        return;\n      }\n\n      if (defaultSelected === null && !options[_i2].disabled) {\n        defaultSelected = options[_i2];\n      }\n    }\n\n    if (defaultSelected !== null) {\n      defaultSelected.selected = true;\n    }\n  }\n}\n/**\n * Implements a <select> host component that allows optionally setting the\n * props `value` and `defaultValue`. If `multiple` is false, the prop must be a\n * stringable. If `multiple` is true, the prop must be an array of stringables.\n *\n * If `value` is not supplied (or null/undefined), user actions that change the\n * selected option will trigger updates to the rendered options.\n *\n * If it is supplied (and not null/undefined), the rendered options will not\n * update in response to user actions. Instead, the `value` prop must change in\n * order for the rendered options to update.\n *\n * If `defaultValue` is provided, any options with the supplied values will be\n * selected.\n */\n\n\nfunction getHostProps$2(element, props) {\n  return _assign({}, props, {\n    value: undefined\n  });\n}\nfunction initWrapperState$1(element, props) {\n  var node = element;\n\n  {\n    checkSelectPropTypes(props);\n  }\n\n  node._wrapperState = {\n    wasMultiple: !!props.multiple\n  };\n\n  {\n    if (props.value !== undefined && props.defaultValue !== undefined && !didWarnValueDefaultValue$1) {\n      error('Select elements must be either controlled or uncontrolled ' + '(specify either the value prop, or the defaultValue prop, but not ' + 'both). Decide between using a controlled or uncontrolled select ' + 'element and remove one of these props. More info: ' + 'https://reactjs.org/link/controlled-components');\n\n      didWarnValueDefaultValue$1 = true;\n    }\n  }\n}\nfunction postMountWrapper$2(element, props) {\n  var node = element;\n  node.multiple = !!props.multiple;\n  var value = props.value;\n\n  if (value != null) {\n    updateOptions(node, !!props.multiple, value, false);\n  } else if (props.defaultValue != null) {\n    updateOptions(node, !!props.multiple, props.defaultValue, true);\n  }\n}\nfunction postUpdateWrapper(element, props) {\n  var node = element;\n  var wasMultiple = node._wrapperState.wasMultiple;\n  node._wrapperState.wasMultiple = !!props.multiple;\n  var value = props.value;\n\n  if (value != null) {\n    updateOptions(node, !!props.multiple, value, false);\n  } else if (wasMultiple !== !!props.multiple) {\n    // For simplicity, reapply `defaultValue` if `multiple` is toggled.\n    if (props.defaultValue != null) {\n      updateOptions(node, !!props.multiple, props.defaultValue, true);\n    } else {\n      // Revert the select back to its default unselected state.\n      updateOptions(node, !!props.multiple, props.multiple ? [] : '', false);\n    }\n  }\n}\nfunction restoreControlledState$1(element, props) {\n  var node = element;\n  var value = props.value;\n\n  if (value != null) {\n    updateOptions(node, !!props.multiple, value, false);\n  }\n}\n\nvar didWarnValDefaultVal = false;\n\n/**\n * Implements a <textarea> host component that allows setting `value`, and\n * `defaultValue`. This differs from the traditional DOM API because value is\n * usually set as PCDATA children.\n *\n * If `value` is not supplied (or null/undefined), user actions that affect the\n * value will trigger updates to the element.\n *\n * If `value` is supplied (and not null/undefined), the rendered element will\n * not trigger updates to the element. Instead, the `value` prop must change in\n * order for the rendered element to be updated.\n *\n * The rendered element will be initialized with an empty value, the prop\n * `defaultValue` if specified, or the children content (deprecated).\n */\nfunction getHostProps$3(element, props) {\n  var node = element;\n\n  if (!(props.dangerouslySetInnerHTML == null)) {\n    {\n      throw Error( \"`dangerouslySetInnerHTML` does not make sense on <textarea>.\" );\n    }\n  } // Always set children to the same thing. In IE9, the selection range will\n  // get reset if `textContent` is mutated.  We could add a check in setTextContent\n  // to only set the value if/when the value differs from the node value (which would\n  // completely solve this IE9 bug), but Sebastian+Sophie seemed to like this\n  // solution. The value can be a boolean or object so that's why it's forced\n  // to be a string.\n\n\n  var hostProps = _assign({}, props, {\n    value: undefined,\n    defaultValue: undefined,\n    children: toString(node._wrapperState.initialValue)\n  });\n\n  return hostProps;\n}\nfunction initWrapperState$2(element, props) {\n  var node = element;\n\n  {\n    checkControlledValueProps('textarea', props);\n\n    if (props.value !== undefined && props.defaultValue !== undefined && !didWarnValDefaultVal) {\n      error('%s contains a textarea with both value and defaultValue props. ' + 'Textarea elements must be either controlled or uncontrolled ' + '(specify either the value prop, or the defaultValue prop, but not ' + 'both). Decide between using a controlled or uncontrolled textarea ' + 'and remove one of these props. More info: ' + 'https://reactjs.org/link/controlled-components', getCurrentFiberOwnerNameInDevOrNull() || 'A component');\n\n      didWarnValDefaultVal = true;\n    }\n  }\n\n  var initialValue = props.value; // Only bother fetching default value if we're going to use it\n\n  if (initialValue == null) {\n    var children = props.children,\n        defaultValue = props.defaultValue;\n\n    if (children != null) {\n      {\n        error('Use the `defaultValue` or `value` props instead of setting ' + 'children on <textarea>.');\n      }\n\n      {\n        if (!(defaultValue == null)) {\n          {\n            throw Error( \"If you supply `defaultValue` on a <textarea>, do not pass children.\" );\n          }\n        }\n\n        if (Array.isArray(children)) {\n          if (!(children.length <= 1)) {\n            {\n              throw Error( \"<textarea> can only have at most one child.\" );\n            }\n          }\n\n          children = children[0];\n        }\n\n        defaultValue = children;\n      }\n    }\n\n    if (defaultValue == null) {\n      defaultValue = '';\n    }\n\n    initialValue = defaultValue;\n  }\n\n  node._wrapperState = {\n    initialValue: getToStringValue(initialValue)\n  };\n}\nfunction updateWrapper$1(element, props) {\n  var node = element;\n  var value = getToStringValue(props.value);\n  var defaultValue = getToStringValue(props.defaultValue);\n\n  if (value != null) {\n    // Cast `value` to a string to ensure the value is set correctly. While\n    // browsers typically do this as necessary, jsdom doesn't.\n    var newValue = toString(value); // To avoid side effects (such as losing text selection), only set value if changed\n\n    if (newValue !== node.value) {\n      node.value = newValue;\n    }\n\n    if (props.defaultValue == null && node.defaultValue !== newValue) {\n      node.defaultValue = newValue;\n    }\n  }\n\n  if (defaultValue != null) {\n    node.defaultValue = toString(defaultValue);\n  }\n}\nfunction postMountWrapper$3(element, props) {\n  var node = element; // This is in postMount because we need access to the DOM node, which is not\n  // available until after the component has mounted.\n\n  var textContent = node.textContent; // Only set node.value if textContent is equal to the expected\n  // initial value. In IE10/IE11 there is a bug where the placeholder attribute\n  // will populate textContent as well.\n  // https://developer.microsoft.com/microsoft-edge/platform/issues/101525/\n\n  if (textContent === node._wrapperState.initialValue) {\n    if (textContent !== '' && textContent !== null) {\n      node.value = textContent;\n    }\n  }\n}\nfunction restoreControlledState$2(element, props) {\n  // DOM component is still mounted; update\n  updateWrapper$1(element, props);\n}\n\nvar HTML_NAMESPACE = 'http://www.w3.org/1999/xhtml';\nvar MATH_NAMESPACE = 'http://www.w3.org/1998/Math/MathML';\nvar SVG_NAMESPACE = 'http://www.w3.org/2000/svg';\nvar Namespaces = {\n  html: HTML_NAMESPACE,\n  mathml: MATH_NAMESPACE,\n  svg: SVG_NAMESPACE\n}; // Assumes there is no parent namespace.\n\nfunction getIntrinsicNamespace(type) {\n  switch (type) {\n    case 'svg':\n      return SVG_NAMESPACE;\n\n    case 'math':\n      return MATH_NAMESPACE;\n\n    default:\n      return HTML_NAMESPACE;\n  }\n}\nfunction getChildNamespace(parentNamespace, type) {\n  if (parentNamespace == null || parentNamespace === HTML_NAMESPACE) {\n    // No (or default) parent namespace: potential entry point.\n    return getIntrinsicNamespace(type);\n  }\n\n  if (parentNamespace === SVG_NAMESPACE && type === 'foreignObject') {\n    // We're leaving SVG.\n    return HTML_NAMESPACE;\n  } // By default, pass namespace below.\n\n\n  return parentNamespace;\n}\n\n/* globals MSApp */\n\n/**\n * Create a function which has 'unsafe' privileges (required by windows8 apps)\n */\nvar createMicrosoftUnsafeLocalFunction = function (func) {\n  if (typeof MSApp !== 'undefined' && MSApp.execUnsafeLocalFunction) {\n    return function (arg0, arg1, arg2, arg3) {\n      MSApp.execUnsafeLocalFunction(function () {\n        return func(arg0, arg1, arg2, arg3);\n      });\n    };\n  } else {\n    return func;\n  }\n};\n\nvar reusableSVGContainer;\n/**\n * Set the innerHTML property of a node\n *\n * @param {DOMElement} node\n * @param {string} html\n * @internal\n */\n\nvar setInnerHTML = createMicrosoftUnsafeLocalFunction(function (node, html) {\n  if (node.namespaceURI === Namespaces.svg) {\n\n    if (!('innerHTML' in node)) {\n      // IE does not have innerHTML for SVG nodes, so instead we inject the\n      // new markup in a temp node and then move the child nodes across into\n      // the target node\n      reusableSVGContainer = reusableSVGContainer || document.createElement('div');\n      reusableSVGContainer.innerHTML = '<svg>' + html.valueOf().toString() + '</svg>';\n      var svgNode = reusableSVGContainer.firstChild;\n\n      while (node.firstChild) {\n        node.removeChild(node.firstChild);\n      }\n\n      while (svgNode.firstChild) {\n        node.appendChild(svgNode.firstChild);\n      }\n\n      return;\n    }\n  }\n\n  node.innerHTML = html;\n});\n\n/**\n * HTML nodeType values that represent the type of the node\n */\nvar ELEMENT_NODE = 1;\nvar TEXT_NODE = 3;\nvar COMMENT_NODE = 8;\nvar DOCUMENT_NODE = 9;\nvar DOCUMENT_FRAGMENT_NODE = 11;\n\n/**\n * Set the textContent property of a node. For text updates, it's faster\n * to set the `nodeValue` of the Text node directly instead of using\n * `.textContent` which will remove the existing node and create a new one.\n *\n * @param {DOMElement} node\n * @param {string} text\n * @internal\n */\n\nvar setTextContent = function (node, text) {\n  if (text) {\n    var firstChild = node.firstChild;\n\n    if (firstChild && firstChild === node.lastChild && firstChild.nodeType === TEXT_NODE) {\n      firstChild.nodeValue = text;\n      return;\n    }\n  }\n\n  node.textContent = text;\n};\n\n// List derived from Gecko source code:\n// https://github.com/mozilla/gecko-dev/blob/4e638efc71/layout/style/test/property_database.js\nvar shorthandToLonghand = {\n  animation: ['animationDelay', 'animationDirection', 'animationDuration', 'animationFillMode', 'animationIterationCount', 'animationName', 'animationPlayState', 'animationTimingFunction'],\n  background: ['backgroundAttachment', 'backgroundClip', 'backgroundColor', 'backgroundImage', 'backgroundOrigin', 'backgroundPositionX', 'backgroundPositionY', 'backgroundRepeat', 'backgroundSize'],\n  backgroundPosition: ['backgroundPositionX', 'backgroundPositionY'],\n  border: ['borderBottomColor', 'borderBottomStyle', 'borderBottomWidth', 'borderImageOutset', 'borderImageRepeat', 'borderImageSlice', 'borderImageSource', 'borderImageWidth', 'borderLeftColor', 'borderLeftStyle', 'borderLeftWidth', 'borderRightColor', 'borderRightStyle', 'borderRightWidth', 'borderTopColor', 'borderTopStyle', 'borderTopWidth'],\n  borderBlockEnd: ['borderBlockEndColor', 'borderBlockEndStyle', 'borderBlockEndWidth'],\n  borderBlockStart: ['borderBlockStartColor', 'borderBlockStartStyle', 'borderBlockStartWidth'],\n  borderBottom: ['borderBottomColor', 'borderBottomStyle', 'borderBottomWidth'],\n  borderColor: ['borderBottomColor', 'borderLeftColor', 'borderRightColor', 'borderTopColor'],\n  borderImage: ['borderImageOutset', 'borderImageRepeat', 'borderImageSlice', 'borderImageSource', 'borderImageWidth'],\n  borderInlineEnd: ['borderInlineEndColor', 'borderInlineEndStyle', 'borderInlineEndWidth'],\n  borderInlineStart: ['borderInlineStartColor', 'borderInlineStartStyle', 'borderInlineStartWidth'],\n  borderLeft: ['borderLeftColor', 'borderLeftStyle', 'borderLeftWidth'],\n  borderRadius: ['borderBottomLeftRadius', 'borderBottomRightRadius', 'borderTopLeftRadius', 'borderTopRightRadius'],\n  borderRight: ['borderRightColor', 'borderRightStyle', 'borderRightWidth'],\n  borderStyle: ['borderBottomStyle', 'borderLeftStyle', 'borderRightStyle', 'borderTopStyle'],\n  borderTop: ['borderTopColor', 'borderTopStyle', 'borderTopWidth'],\n  borderWidth: ['borderBottomWidth', 'borderLeftWidth', 'borderRightWidth', 'borderTopWidth'],\n  columnRule: ['columnRuleColor', 'columnRuleStyle', 'columnRuleWidth'],\n  columns: ['columnCount', 'columnWidth'],\n  flex: ['flexBasis', 'flexGrow', 'flexShrink'],\n  flexFlow: ['flexDirection', 'flexWrap'],\n  font: ['fontFamily', 'fontFeatureSettings', 'fontKerning', 'fontLanguageOverride', 'fontSize', 'fontSizeAdjust', 'fontStretch', 'fontStyle', 'fontVariant', 'fontVariantAlternates', 'fontVariantCaps', 'fontVariantEastAsian', 'fontVariantLigatures', 'fontVariantNumeric', 'fontVariantPosition', 'fontWeight', 'lineHeight'],\n  fontVariant: ['fontVariantAlternates', 'fontVariantCaps', 'fontVariantEastAsian', 'fontVariantLigatures', 'fontVariantNumeric', 'fontVariantPosition'],\n  gap: ['columnGap', 'rowGap'],\n  grid: ['gridAutoColumns', 'gridAutoFlow', 'gridAutoRows', 'gridTemplateAreas', 'gridTemplateColumns', 'gridTemplateRows'],\n  gridArea: ['gridColumnEnd', 'gridColumnStart', 'gridRowEnd', 'gridRowStart'],\n  gridColumn: ['gridColumnEnd', 'gridColumnStart'],\n  gridColumnGap: ['columnGap'],\n  gridGap: ['columnGap', 'rowGap'],\n  gridRow: ['gridRowEnd', 'gridRowStart'],\n  gridRowGap: ['rowGap'],\n  gridTemplate: ['gridTemplateAreas', 'gridTemplateColumns', 'gridTemplateRows'],\n  listStyle: ['listStyleImage', 'listStylePosition', 'listStyleType'],\n  margin: ['marginBottom', 'marginLeft', 'marginRight', 'marginTop'],\n  marker: ['markerEnd', 'markerMid', 'markerStart'],\n  mask: ['maskClip', 'maskComposite', 'maskImage', 'maskMode', 'maskOrigin', 'maskPositionX', 'maskPositionY', 'maskRepeat', 'maskSize'],\n  maskPosition: ['maskPositionX', 'maskPositionY'],\n  outline: ['outlineColor', 'outlineStyle', 'outlineWidth'],\n  overflow: ['overflowX', 'overflowY'],\n  padding: ['paddingBottom', 'paddingLeft', 'paddingRight', 'paddingTop'],\n  placeContent: ['alignContent', 'justifyContent'],\n  placeItems: ['alignItems', 'justifyItems'],\n  placeSelf: ['alignSelf', 'justifySelf'],\n  textDecoration: ['textDecorationColor', 'textDecorationLine', 'textDecorationStyle'],\n  textEmphasis: ['textEmphasisColor', 'textEmphasisStyle'],\n  transition: ['transitionDelay', 'transitionDuration', 'transitionProperty', 'transitionTimingFunction'],\n  wordWrap: ['overflowWrap']\n};\n\n/**\n * CSS properties which accept numbers but are not in units of \"px\".\n */\nvar isUnitlessNumber = {\n  animationIterationCount: true,\n  borderImageOutset: true,\n  borderImageSlice: true,\n  borderImageWidth: true,\n  boxFlex: true,\n  boxFlexGroup: true,\n  boxOrdinalGroup: true,\n  columnCount: true,\n  columns: true,\n  flex: true,\n  flexGrow: true,\n  flexPositive: true,\n  flexShrink: true,\n  flexNegative: true,\n  flexOrder: true,\n  gridArea: true,\n  gridRow: true,\n  gridRowEnd: true,\n  gridRowSpan: true,\n  gridRowStart: true,\n  gridColumn: true,\n  gridColumnEnd: true,\n  gridColumnSpan: true,\n  gridColumnStart: true,\n  fontWeight: true,\n  lineClamp: true,\n  lineHeight: true,\n  opacity: true,\n  order: true,\n  orphans: true,\n  tabSize: true,\n  widows: true,\n  zIndex: true,\n  zoom: true,\n  // SVG-related properties\n  fillOpacity: true,\n  floodOpacity: true,\n  stopOpacity: true,\n  strokeDasharray: true,\n  strokeDashoffset: true,\n  strokeMiterlimit: true,\n  strokeOpacity: true,\n  strokeWidth: true\n};\n/**\n * @param {string} prefix vendor-specific prefix, eg: Webkit\n * @param {string} key style name, eg: transitionDuration\n * @return {string} style name prefixed with `prefix`, properly camelCased, eg:\n * WebkitTransitionDuration\n */\n\nfunction prefixKey(prefix, key) {\n  return prefix + key.charAt(0).toUpperCase() + key.substring(1);\n}\n/**\n * Support style names that may come passed in prefixed by adding permutations\n * of vendor prefixes.\n */\n\n\nvar prefixes = ['Webkit', 'ms', 'Moz', 'O']; // Using Object.keys here, or else the vanilla for-in loop makes IE8 go into an\n// infinite loop, because it iterates over the newly added props too.\n\nObject.keys(isUnitlessNumber).forEach(function (prop) {\n  prefixes.forEach(function (prefix) {\n    isUnitlessNumber[prefixKey(prefix, prop)] = isUnitlessNumber[prop];\n  });\n});\n\n/**\n * Convert a value into the proper css writable value. The style name `name`\n * should be logical (no hyphens), as specified\n * in `CSSProperty.isUnitlessNumber`.\n *\n * @param {string} name CSS property name such as `topMargin`.\n * @param {*} value CSS property value such as `10px`.\n * @return {string} Normalized style value with dimensions applied.\n */\n\nfunction dangerousStyleValue(name, value, isCustomProperty) {\n  // Note that we've removed escapeTextForBrowser() calls here since the\n  // whole string will be escaped when the attribute is injected into\n  // the markup. If you provide unsafe user data here they can inject\n  // arbitrary CSS which may be problematic (I couldn't repro this):\n  // https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet\n  // http://www.thespanner.co.uk/2007/11/26/ultimate-xss-css-injection/\n  // This is not an XSS hole but instead a potential CSS injection issue\n  // which has lead to a greater discussion about how we're going to\n  // trust URLs moving forward. See #2115901\n  var isEmpty = value == null || typeof value === 'boolean' || value === '';\n\n  if (isEmpty) {\n    return '';\n  }\n\n  if (!isCustomProperty && typeof value === 'number' && value !== 0 && !(isUnitlessNumber.hasOwnProperty(name) && isUnitlessNumber[name])) {\n    return value + 'px'; // Presumes implicit 'px' suffix for unitless numbers\n  }\n\n  return ('' + value).trim();\n}\n\nvar uppercasePattern = /([A-Z])/g;\nvar msPattern = /^ms-/;\n/**\n * Hyphenates a camelcased CSS property name, for example:\n *\n *   > hyphenateStyleName('backgroundColor')\n *   < \"background-color\"\n *   > hyphenateStyleName('MozTransition')\n *   < \"-moz-transition\"\n *   > hyphenateStyleName('msTransition')\n *   < \"-ms-transition\"\n *\n * As Modernizr suggests (http://modernizr.com/docs/#prefixed), an `ms` prefix\n * is converted to `-ms-`.\n */\n\nfunction hyphenateStyleName(name) {\n  return name.replace(uppercasePattern, '-$1').toLowerCase().replace(msPattern, '-ms-');\n}\n\nvar warnValidStyle = function () {};\n\n{\n  // 'msTransform' is correct, but the other prefixes should be capitalized\n  var badVendoredStyleNamePattern = /^(?:webkit|moz|o)[A-Z]/;\n  var msPattern$1 = /^-ms-/;\n  var hyphenPattern = /-(.)/g; // style values shouldn't contain a semicolon\n\n  var badStyleValueWithSemicolonPattern = /;\\s*$/;\n  var warnedStyleNames = {};\n  var warnedStyleValues = {};\n  var warnedForNaNValue = false;\n  var warnedForInfinityValue = false;\n\n  var camelize = function (string) {\n    return string.replace(hyphenPattern, function (_, character) {\n      return character.toUpperCase();\n    });\n  };\n\n  var warnHyphenatedStyleName = function (name) {\n    if (warnedStyleNames.hasOwnProperty(name) && warnedStyleNames[name]) {\n      return;\n    }\n\n    warnedStyleNames[name] = true;\n\n    error('Unsupported style property %s. Did you mean %s?', name, // As Andi Smith suggests\n    // (http://www.andismith.com/blog/2012/02/modernizr-prefixed/), an `-ms` prefix\n    // is converted to lowercase `ms`.\n    camelize(name.replace(msPattern$1, 'ms-')));\n  };\n\n  var warnBadVendoredStyleName = function (name) {\n    if (warnedStyleNames.hasOwnProperty(name) && warnedStyleNames[name]) {\n      return;\n    }\n\n    warnedStyleNames[name] = true;\n\n    error('Unsupported vendor-prefixed style property %s. Did you mean %s?', name, name.charAt(0).toUpperCase() + name.slice(1));\n  };\n\n  var warnStyleValueWithSemicolon = function (name, value) {\n    if (warnedStyleValues.hasOwnProperty(value) && warnedStyleValues[value]) {\n      return;\n    }\n\n    warnedStyleValues[value] = true;\n\n    error(\"Style property values shouldn't contain a semicolon. \" + 'Try \"%s: %s\" instead.', name, value.replace(badStyleValueWithSemicolonPattern, ''));\n  };\n\n  var warnStyleValueIsNaN = function (name, value) {\n    if (warnedForNaNValue) {\n      return;\n    }\n\n    warnedForNaNValue = true;\n\n    error('`NaN` is an invalid value for the `%s` css style property.', name);\n  };\n\n  var warnStyleValueIsInfinity = function (name, value) {\n    if (warnedForInfinityValue) {\n      return;\n    }\n\n    warnedForInfinityValue = true;\n\n    error('`Infinity` is an invalid value for the `%s` css style property.', name);\n  };\n\n  warnValidStyle = function (name, value) {\n    if (name.indexOf('-') > -1) {\n      warnHyphenatedStyleName(name);\n    } else if (badVendoredStyleNamePattern.test(name)) {\n      warnBadVendoredStyleName(name);\n    } else if (badStyleValueWithSemicolonPattern.test(value)) {\n      warnStyleValueWithSemicolon(name, value);\n    }\n\n    if (typeof value === 'number') {\n      if (isNaN(value)) {\n        warnStyleValueIsNaN(name, value);\n      } else if (!isFinite(value)) {\n        warnStyleValueIsInfinity(name, value);\n      }\n    }\n  };\n}\n\nvar warnValidStyle$1 = warnValidStyle;\n\n/**\n * Operations for dealing with CSS properties.\n */\n\n/**\n * This creates a string that is expected to be equivalent to the style\n * attribute generated by server-side rendering. It by-passes warnings and\n * security checks so it's not safe to use this value for anything other than\n * comparison. It is only used in DEV for SSR validation.\n */\n\nfunction createDangerousStringForStyles(styles) {\n  {\n    var serialized = '';\n    var delimiter = '';\n\n    for (var styleName in styles) {\n      if (!styles.hasOwnProperty(styleName)) {\n        continue;\n      }\n\n      var styleValue = styles[styleName];\n\n      if (styleValue != null) {\n        var isCustomProperty = styleName.indexOf('--') === 0;\n        serialized += delimiter + (isCustomProperty ? styleName : hyphenateStyleName(styleName)) + ':';\n        serialized += dangerousStyleValue(styleName, styleValue, isCustomProperty);\n        delimiter = ';';\n      }\n    }\n\n    return serialized || null;\n  }\n}\n/**\n * Sets the value for multiple styles on a node.  If a value is specified as\n * '' (empty string), the corresponding style property will be unset.\n *\n * @param {DOMElement} node\n * @param {object} styles\n */\n\nfunction setValueForStyles(node, styles) {\n  var style = node.style;\n\n  for (var styleName in styles) {\n    if (!styles.hasOwnProperty(styleName)) {\n      continue;\n    }\n\n    var isCustomProperty = styleName.indexOf('--') === 0;\n\n    {\n      if (!isCustomProperty) {\n        warnValidStyle$1(styleName, styles[styleName]);\n      }\n    }\n\n    var styleValue = dangerousStyleValue(styleName, styles[styleName], isCustomProperty);\n\n    if (styleName === 'float') {\n      styleName = 'cssFloat';\n    }\n\n    if (isCustomProperty) {\n      style.setProperty(styleName, styleValue);\n    } else {\n      style[styleName] = styleValue;\n    }\n  }\n}\n\nfunction isValueEmpty(value) {\n  return value == null || typeof value === 'boolean' || value === '';\n}\n/**\n * Given {color: 'red', overflow: 'hidden'} returns {\n *   color: 'color',\n *   overflowX: 'overflow',\n *   overflowY: 'overflow',\n * }. This can be read as \"the overflowY property was set by the overflow\n * shorthand\". That is, the values are the property that each was derived from.\n */\n\n\nfunction expandShorthandMap(styles) {\n  var expanded = {};\n\n  for (var key in styles) {\n    var longhands = shorthandToLonghand[key] || [key];\n\n    for (var i = 0; i < longhands.length; i++) {\n      expanded[longhands[i]] = key;\n    }\n  }\n\n  return expanded;\n}\n/**\n * When mixing shorthand and longhand property names, we warn during updates if\n * we expect an incorrect result to occur. In particular, we warn for:\n *\n * Updating a shorthand property (longhand gets overwritten):\n *   {font: 'foo', fontVariant: 'bar'} -> {font: 'baz', fontVariant: 'bar'}\n *   becomes .style.font = 'baz'\n * Removing a shorthand property (longhand gets lost too):\n *   {font: 'foo', fontVariant: 'bar'} -> {fontVariant: 'bar'}\n *   becomes .style.font = ''\n * Removing a longhand property (should revert to shorthand; doesn't):\n *   {font: 'foo', fontVariant: 'bar'} -> {font: 'foo'}\n *   becomes .style.fontVariant = ''\n */\n\n\nfunction validateShorthandPropertyCollisionInDev(styleUpdates, nextStyles) {\n  {\n    if (!nextStyles) {\n      return;\n    }\n\n    var expandedUpdates = expandShorthandMap(styleUpdates);\n    var expandedStyles = expandShorthandMap(nextStyles);\n    var warnedAbout = {};\n\n    for (var key in expandedUpdates) {\n      var originalKey = expandedUpdates[key];\n      var correctOriginalKey = expandedStyles[key];\n\n      if (correctOriginalKey && originalKey !== correctOriginalKey) {\n        var warningKey = originalKey + ',' + correctOriginalKey;\n\n        if (warnedAbout[warningKey]) {\n          continue;\n        }\n\n        warnedAbout[warningKey] = true;\n\n        error('%s a style property during rerender (%s) when a ' + 'conflicting property is set (%s) can lead to styling bugs. To ' + \"avoid this, don't mix shorthand and non-shorthand properties \" + 'for the same value; instead, replace the shorthand with ' + 'separate values.', isValueEmpty(styleUpdates[originalKey]) ? 'Removing' : 'Updating', originalKey, correctOriginalKey);\n      }\n    }\n  }\n}\n\n// For HTML, certain tags should omit their close tag. We keep a list for\n// those special-case tags.\nvar omittedCloseTags = {\n  area: true,\n  base: true,\n  br: true,\n  col: true,\n  embed: true,\n  hr: true,\n  img: true,\n  input: true,\n  keygen: true,\n  link: true,\n  meta: true,\n  param: true,\n  source: true,\n  track: true,\n  wbr: true // NOTE: menuitem's close tag should be omitted, but that causes problems.\n\n};\n\n// `omittedCloseTags` except that `menuitem` should still have its closing tag.\n\nvar voidElementTags = _assign({\n  menuitem: true\n}, omittedCloseTags);\n\nvar HTML = '__html';\n\nfunction assertValidProps(tag, props) {\n  if (!props) {\n    return;\n  } // Note the use of `==` which checks for null or undefined.\n\n\n  if (voidElementTags[tag]) {\n    if (!(props.children == null && props.dangerouslySetInnerHTML == null)) {\n      {\n        throw Error( tag + \" is a void element tag and must neither have `children` nor use `dangerouslySetInnerHTML`.\" );\n      }\n    }\n  }\n\n  if (props.dangerouslySetInnerHTML != null) {\n    if (!(props.children == null)) {\n      {\n        throw Error( \"Can only set one of `children` or `props.dangerouslySetInnerHTML`.\" );\n      }\n    }\n\n    if (!(typeof props.dangerouslySetInnerHTML === 'object' && HTML in props.dangerouslySetInnerHTML)) {\n      {\n        throw Error( \"`props.dangerouslySetInnerHTML` must be in the form `{__html: ...}`. Please visit https://reactjs.org/link/dangerously-set-inner-html for more information.\" );\n      }\n    }\n  }\n\n  {\n    if (!props.suppressContentEditableWarning && props.contentEditable && props.children != null) {\n      error('A component is `contentEditable` and contains `children` managed by ' + 'React. It is now your responsibility to guarantee that none of ' + 'those nodes are unexpectedly modified or duplicated. This is ' + 'probably not intentional.');\n    }\n  }\n\n  if (!(props.style == null || typeof props.style === 'object')) {\n    {\n      throw Error( \"The `style` prop expects a mapping from style properties to values, not a string. For example, style={{marginRight: spacing + 'em'}} when using JSX.\" );\n    }\n  }\n}\n\nfunction isCustomComponent(tagName, props) {\n  if (tagName.indexOf('-') === -1) {\n    return typeof props.is === 'string';\n  }\n\n  switch (tagName) {\n    // These are reserved SVG and MathML elements.\n    // We don't mind this list too much because we expect it to never grow.\n    // The alternative is to track the namespace in a few places which is convoluted.\n    // https://w3c.github.io/webcomponents/spec/custom/#custom-elements-core-concepts\n    case 'annotation-xml':\n    case 'color-profile':\n    case 'font-face':\n    case 'font-face-src':\n    case 'font-face-uri':\n    case 'font-face-format':\n    case 'font-face-name':\n    case 'missing-glyph':\n      return false;\n\n    default:\n      return true;\n  }\n}\n\n// When adding attributes to the HTML or SVG allowed attribute list, be sure to\n// also add them to this module to ensure casing and incorrect name\n// warnings.\nvar possibleStandardNames = {\n  // HTML\n  accept: 'accept',\n  acceptcharset: 'acceptCharset',\n  'accept-charset': 'acceptCharset',\n  accesskey: 'accessKey',\n  action: 'action',\n  allowfullscreen: 'allowFullScreen',\n  alt: 'alt',\n  as: 'as',\n  async: 'async',\n  autocapitalize: 'autoCapitalize',\n  autocomplete: 'autoComplete',\n  autocorrect: 'autoCorrect',\n  autofocus: 'autoFocus',\n  autoplay: 'autoPlay',\n  autosave: 'autoSave',\n  capture: 'capture',\n  cellpadding: 'cellPadding',\n  cellspacing: 'cellSpacing',\n  challenge: 'challenge',\n  charset: 'charSet',\n  checked: 'checked',\n  children: 'children',\n  cite: 'cite',\n  class: 'className',\n  classid: 'classID',\n  classname: 'className',\n  cols: 'cols',\n  colspan: 'colSpan',\n  content: 'content',\n  contenteditable: 'contentEditable',\n  contextmenu: 'contextMenu',\n  controls: 'controls',\n  controlslist: 'controlsList',\n  coords: 'coords',\n  crossorigin: 'crossOrigin',\n  dangerouslysetinnerhtml: 'dangerouslySetInnerHTML',\n  data: 'data',\n  datetime: 'dateTime',\n  default: 'default',\n  defaultchecked: 'defaultChecked',\n  defaultvalue: 'defaultValue',\n  defer: 'defer',\n  dir: 'dir',\n  disabled: 'disabled',\n  disablepictureinpicture: 'disablePictureInPicture',\n  disableremoteplayback: 'disableRemotePlayback',\n  download: 'download',\n  draggable: 'draggable',\n  enctype: 'encType',\n  enterkeyhint: 'enterKeyHint',\n  for: 'htmlFor',\n  form: 'form',\n  formmethod: 'formMethod',\n  formaction: 'formAction',\n  formenctype: 'formEncType',\n  formnovalidate: 'formNoValidate',\n  formtarget: 'formTarget',\n  frameborder: 'frameBorder',\n  headers: 'headers',\n  height: 'height',\n  hidden: 'hidden',\n  high: 'high',\n  href: 'href',\n  hreflang: 'hrefLang',\n  htmlfor: 'htmlFor',\n  httpequiv: 'httpEquiv',\n  'http-equiv': 'httpEquiv',\n  icon: 'icon',\n  id: 'id',\n  innerhtml: 'innerHTML',\n  inputmode: 'inputMode',\n  integrity: 'integrity',\n  is: 'is',\n  itemid: 'itemID',\n  itemprop: 'itemProp',\n  itemref: 'itemRef',\n  itemscope: 'itemScope',\n  itemtype: 'itemType',\n  keyparams: 'keyParams',\n  keytype: 'keyType',\n  kind: 'kind',\n  label: 'label',\n  lang: 'lang',\n  list: 'list',\n  loop: 'loop',\n  low: 'low',\n  manifest: 'manifest',\n  marginwidth: 'marginWidth',\n  marginheight: 'marginHeight',\n  max: 'max',\n  maxlength: 'maxLength',\n  media: 'media',\n  mediagroup: 'mediaGroup',\n  method: 'method',\n  min: 'min',\n  minlength: 'minLength',\n  multiple: 'multiple',\n  muted: 'muted',\n  name: 'name',\n  nomodule: 'noModule',\n  nonce: 'nonce',\n  novalidate: 'noValidate',\n  open: 'open',\n  optimum: 'optimum',\n  pattern: 'pattern',\n  placeholder: 'placeholder',\n  playsinline: 'playsInline',\n  poster: 'poster',\n  preload: 'preload',\n  profile: 'profile',\n  radiogroup: 'radioGroup',\n  readonly: 'readOnly',\n  referrerpolicy: 'referrerPolicy',\n  rel: 'rel',\n  required: 'required',\n  reversed: 'reversed',\n  role: 'role',\n  rows: 'rows',\n  rowspan: 'rowSpan',\n  sandbox: 'sandbox',\n  scope: 'scope',\n  scoped: 'scoped',\n  scrolling: 'scrolling',\n  seamless: 'seamless',\n  selected: 'selected',\n  shape: 'shape',\n  size: 'size',\n  sizes: 'sizes',\n  span: 'span',\n  spellcheck: 'spellCheck',\n  src: 'src',\n  srcdoc: 'srcDoc',\n  srclang: 'srcLang',\n  srcset: 'srcSet',\n  start: 'start',\n  step: 'step',\n  style: 'style',\n  summary: 'summary',\n  tabindex: 'tabIndex',\n  target: 'target',\n  title: 'title',\n  type: 'type',\n  usemap: 'useMap',\n  value: 'value',\n  width: 'width',\n  wmode: 'wmode',\n  wrap: 'wrap',\n  // SVG\n  about: 'about',\n  accentheight: 'accentHeight',\n  'accent-height': 'accentHeight',\n  accumulate: 'accumulate',\n  additive: 'additive',\n  alignmentbaseline: 'alignmentBaseline',\n  'alignment-baseline': 'alignmentBaseline',\n  allowreorder: 'allowReorder',\n  alphabetic: 'alphabetic',\n  amplitude: 'amplitude',\n  arabicform: 'arabicForm',\n  'arabic-form': 'arabicForm',\n  ascent: 'ascent',\n  attributename: 'attributeName',\n  attributetype: 'attributeType',\n  autoreverse: 'autoReverse',\n  azimuth: 'azimuth',\n  basefrequency: 'baseFrequency',\n  baselineshift: 'baselineShift',\n  'baseline-shift': 'baselineShift',\n  baseprofile: 'baseProfile',\n  bbox: 'bbox',\n  begin: 'begin',\n  bias: 'bias',\n  by: 'by',\n  calcmode: 'calcMode',\n  capheight: 'capHeight',\n  'cap-height': 'capHeight',\n  clip: 'clip',\n  clippath: 'clipPath',\n  'clip-path': 'clipPath',\n  clippathunits: 'clipPathUnits',\n  cliprule: 'clipRule',\n  'clip-rule': 'clipRule',\n  color: 'color',\n  colorinterpolation: 'colorInterpolation',\n  'color-interpolation': 'colorInterpolation',\n  colorinterpolationfilters: 'colorInterpolationFilters',\n  'color-interpolation-filters': 'colorInterpolationFilters',\n  colorprofile: 'colorProfile',\n  'color-profile': 'colorProfile',\n  colorrendering: 'colorRendering',\n  'color-rendering': 'colorRendering',\n  contentscripttype: 'contentScriptType',\n  contentstyletype: 'contentStyleType',\n  cursor: 'cursor',\n  cx: 'cx',\n  cy: 'cy',\n  d: 'd',\n  datatype: 'datatype',\n  decelerate: 'decelerate',\n  descent: 'descent',\n  diffuseconstant: 'diffuseConstant',\n  direction: 'direction',\n  display: 'display',\n  divisor: 'divisor',\n  dominantbaseline: 'dominantBaseline',\n  'dominant-baseline': 'dominantBaseline',\n  dur: 'dur',\n  dx: 'dx',\n  dy: 'dy',\n  edgemode: 'edgeMode',\n  elevation: 'elevation',\n  enablebackground: 'enableBackground',\n  'enable-background': 'enableBackground',\n  end: 'end',\n  exponent: 'exponent',\n  externalresourcesrequired: 'externalResourcesRequired',\n  fill: 'fill',\n  fillopacity: 'fillOpacity',\n  'fill-opacity': 'fillOpacity',\n  fillrule: 'fillRule',\n  'fill-rule': 'fillRule',\n  filter: 'filter',\n  filterres: 'filterRes',\n  filterunits: 'filterUnits',\n  floodopacity: 'floodOpacity',\n  'flood-opacity': 'floodOpacity',\n  floodcolor: 'floodColor',\n  'flood-color': 'floodColor',\n  focusable: 'focusable',\n  fontfamily: 'fontFamily',\n  'font-family': 'fontFamily',\n  fontsize: 'fontSize',\n  'font-size': 'fontSize',\n  fontsizeadjust: 'fontSizeAdjust',\n  'font-size-adjust': 'fontSizeAdjust',\n  fontstretch: 'fontStretch',\n  'font-stretch': 'fontStretch',\n  fontstyle: 'fontStyle',\n  'font-style': 'fontStyle',\n  fontvariant: 'fontVariant',\n  'font-variant': 'fontVariant',\n  fontweight: 'fontWeight',\n  'font-weight': 'fontWeight',\n  format: 'format',\n  from: 'from',\n  fx: 'fx',\n  fy: 'fy',\n  g1: 'g1',\n  g2: 'g2',\n  glyphname: 'glyphName',\n  'glyph-name': 'glyphName',\n  glyphorientationhorizontal: 'glyphOrientationHorizontal',\n  'glyph-orientation-horizontal': 'glyphOrientationHorizontal',\n  glyphorientationvertical: 'glyphOrientationVertical',\n  'glyph-orientation-vertical': 'glyphOrientationVertical',\n  glyphref: 'glyphRef',\n  gradienttransform: 'gradientTransform',\n  gradientunits: 'gradientUnits',\n  hanging: 'hanging',\n  horizadvx: 'horizAdvX',\n  'horiz-adv-x': 'horizAdvX',\n  horizoriginx: 'horizOriginX',\n  'horiz-origin-x': 'horizOriginX',\n  ideographic: 'ideographic',\n  imagerendering: 'imageRendering',\n  'image-rendering': 'imageRendering',\n  in2: 'in2',\n  in: 'in',\n  inlist: 'inlist',\n  intercept: 'intercept',\n  k1: 'k1',\n  k2: 'k2',\n  k3: 'k3',\n  k4: 'k4',\n  k: 'k',\n  kernelmatrix: 'kernelMatrix',\n  kernelunitlength: 'kernelUnitLength',\n  kerning: 'kerning',\n  keypoints: 'keyPoints',\n  keysplines: 'keySplines',\n  keytimes: 'keyTimes',\n  lengthadjust: 'lengthAdjust',\n  letterspacing: 'letterSpacing',\n  'letter-spacing': 'letterSpacing',\n  lightingcolor: 'lightingColor',\n  'lighting-color': 'lightingColor',\n  limitingconeangle: 'limitingConeAngle',\n  local: 'local',\n  markerend: 'markerEnd',\n  'marker-end': 'markerEnd',\n  markerheight: 'markerHeight',\n  markermid: 'markerMid',\n  'marker-mid': 'markerMid',\n  markerstart: 'markerStart',\n  'marker-start': 'markerStart',\n  markerunits: 'markerUnits',\n  markerwidth: 'markerWidth',\n  mask: 'mask',\n  maskcontentunits: 'maskContentUnits',\n  maskunits: 'maskUnits',\n  mathematical: 'mathematical',\n  mode: 'mode',\n  numoctaves: 'numOctaves',\n  offset: 'offset',\n  opacity: 'opacity',\n  operator: 'operator',\n  order: 'order',\n  orient: 'orient',\n  orientation: 'orientation',\n  origin: 'origin',\n  overflow: 'overflow',\n  overlineposition: 'overlinePosition',\n  'overline-position': 'overlinePosition',\n  overlinethickness: 'overlineThickness',\n  'overline-thickness': 'overlineThickness',\n  paintorder: 'paintOrder',\n  'paint-order': 'paintOrder',\n  panose1: 'panose1',\n  'panose-1': 'panose1',\n  pathlength: 'pathLength',\n  patterncontentunits: 'patternContentUnits',\n  patterntransform: 'patternTransform',\n  patternunits: 'patternUnits',\n  pointerevents: 'pointerEvents',\n  'pointer-events': 'pointerEvents',\n  points: 'points',\n  pointsatx: 'pointsAtX',\n  pointsaty: 'pointsAtY',\n  pointsatz: 'pointsAtZ',\n  prefix: 'prefix',\n  preservealpha: 'preserveAlpha',\n  preserveaspectratio: 'preserveAspectRatio',\n  primitiveunits: 'primitiveUnits',\n  property: 'property',\n  r: 'r',\n  radius: 'radius',\n  refx: 'refX',\n  refy: 'refY',\n  renderingintent: 'renderingIntent',\n  'rendering-intent': 'renderingIntent',\n  repeatcount: 'repeatCount',\n  repeatdur: 'repeatDur',\n  requiredextensions: 'requiredExtensions',\n  requiredfeatures: 'requiredFeatures',\n  resource: 'resource',\n  restart: 'restart',\n  result: 'result',\n  results: 'results',\n  rotate: 'rotate',\n  rx: 'rx',\n  ry: 'ry',\n  scale: 'scale',\n  security: 'security',\n  seed: 'seed',\n  shaperendering: 'shapeRendering',\n  'shape-rendering': 'shapeRendering',\n  slope: 'slope',\n  spacing: 'spacing',\n  specularconstant: 'specularConstant',\n  specularexponent: 'specularExponent',\n  speed: 'speed',\n  spreadmethod: 'spreadMethod',\n  startoffset: 'startOffset',\n  stddeviation: 'stdDeviation',\n  stemh: 'stemh',\n  stemv: 'stemv',\n  stitchtiles: 'stitchTiles',\n  stopcolor: 'stopColor',\n  'stop-color': 'stopColor',\n  stopopacity: 'stopOpacity',\n  'stop-opacity': 'stopOpacity',\n  strikethroughposition: 'strikethroughPosition',\n  'strikethrough-position': 'strikethroughPosition',\n  strikethroughthickness: 'strikethroughThickness',\n  'strikethrough-thickness': 'strikethroughThickness',\n  string: 'string',\n  stroke: 'stroke',\n  strokedasharray: 'strokeDasharray',\n  'stroke-dasharray': 'strokeDasharray',\n  strokedashoffset: 'strokeDashoffset',\n  'stroke-dashoffset': 'strokeDashoffset',\n  strokelinecap: 'strokeLinecap',\n  'stroke-linecap': 'strokeLinecap',\n  strokelinejoin: 'strokeLinejoin',\n  'stroke-linejoin': 'strokeLinejoin',\n  strokemiterlimit: 'strokeMiterlimit',\n  'stroke-miterlimit': 'strokeMiterlimit',\n  strokewidth: 'strokeWidth',\n  'stroke-width': 'strokeWidth',\n  strokeopacity: 'strokeOpacity',\n  'stroke-opacity': 'strokeOpacity',\n  suppresscontenteditablewarning: 'suppressContentEditableWarning',\n  suppresshydrationwarning: 'suppressHydrationWarning',\n  surfacescale: 'surfaceScale',\n  systemlanguage: 'systemLanguage',\n  tablevalues: 'tableValues',\n  targetx: 'targetX',\n  targety: 'targetY',\n  textanchor: 'textAnchor',\n  'text-anchor': 'textAnchor',\n  textdecoration: 'textDecoration',\n  'text-decoration': 'textDecoration',\n  textlength: 'textLength',\n  textrendering: 'textRendering',\n  'text-rendering': 'textRendering',\n  to: 'to',\n  transform: 'transform',\n  typeof: 'typeof',\n  u1: 'u1',\n  u2: 'u2',\n  underlineposition: 'underlinePosition',\n  'underline-position': 'underlinePosition',\n  underlinethickness: 'underlineThickness',\n  'underline-thickness': 'underlineThickness',\n  unicode: 'unicode',\n  unicodebidi: 'unicodeBidi',\n  'unicode-bidi': 'unicodeBidi',\n  unicoderange: 'unicodeRange',\n  'unicode-range': 'unicodeRange',\n  unitsperem: 'unitsPerEm',\n  'units-per-em': 'unitsPerEm',\n  unselectable: 'unselectable',\n  valphabetic: 'vAlphabetic',\n  'v-alphabetic': 'vAlphabetic',\n  values: 'values',\n  vectoreffect: 'vectorEffect',\n  'vector-effect': 'vectorEffect',\n  version: 'version',\n  vertadvy: 'vertAdvY',\n  'vert-adv-y': 'vertAdvY',\n  vertoriginx: 'vertOriginX',\n  'vert-origin-x': 'vertOriginX',\n  vertoriginy: 'vertOriginY',\n  'vert-origin-y': 'vertOriginY',\n  vhanging: 'vHanging',\n  'v-hanging': 'vHanging',\n  videographic: 'vIdeographic',\n  'v-ideographic': 'vIdeographic',\n  viewbox: 'viewBox',\n  viewtarget: 'viewTarget',\n  visibility: 'visibility',\n  vmathematical: 'vMathematical',\n  'v-mathematical': 'vMathematical',\n  vocab: 'vocab',\n  widths: 'widths',\n  wordspacing: 'wordSpacing',\n  'word-spacing': 'wordSpacing',\n  writingmode: 'writingMode',\n  'writing-mode': 'writingMode',\n  x1: 'x1',\n  x2: 'x2',\n  x: 'x',\n  xchannelselector: 'xChannelSelector',\n  xheight: 'xHeight',\n  'x-height': 'xHeight',\n  xlinkactuate: 'xlinkActuate',\n  'xlink:actuate': 'xlinkActuate',\n  xlinkarcrole: 'xlinkArcrole',\n  'xlink:arcrole': 'xlinkArcrole',\n  xlinkhref: 'xlinkHref',\n  'xlink:href': 'xlinkHref',\n  xlinkrole: 'xlinkRole',\n  'xlink:role': 'xlinkRole',\n  xlinkshow: 'xlinkShow',\n  'xlink:show': 'xlinkShow',\n  xlinktitle: 'xlinkTitle',\n  'xlink:title': 'xlinkTitle',\n  xlinktype: 'xlinkType',\n  'xlink:type': 'xlinkType',\n  xmlbase: 'xmlBase',\n  'xml:base': 'xmlBase',\n  xmllang: 'xmlLang',\n  'xml:lang': 'xmlLang',\n  xmlns: 'xmlns',\n  'xml:space': 'xmlSpace',\n  xmlnsxlink: 'xmlnsXlink',\n  'xmlns:xlink': 'xmlnsXlink',\n  xmlspace: 'xmlSpace',\n  y1: 'y1',\n  y2: 'y2',\n  y: 'y',\n  ychannelselector: 'yChannelSelector',\n  z: 'z',\n  zoomandpan: 'zoomAndPan'\n};\n\nvar ariaProperties = {\n  'aria-current': 0,\n  // state\n  'aria-details': 0,\n  'aria-disabled': 0,\n  // state\n  'aria-hidden': 0,\n  // state\n  'aria-invalid': 0,\n  // state\n  'aria-keyshortcuts': 0,\n  'aria-label': 0,\n  'aria-roledescription': 0,\n  // Widget Attributes\n  'aria-autocomplete': 0,\n  'aria-checked': 0,\n  'aria-expanded': 0,\n  'aria-haspopup': 0,\n  'aria-level': 0,\n  'aria-modal': 0,\n  'aria-multiline': 0,\n  'aria-multiselectable': 0,\n  'aria-orientation': 0,\n  'aria-placeholder': 0,\n  'aria-pressed': 0,\n  'aria-readonly': 0,\n  'aria-required': 0,\n  'aria-selected': 0,\n  'aria-sort': 0,\n  'aria-valuemax': 0,\n  'aria-valuemin': 0,\n  'aria-valuenow': 0,\n  'aria-valuetext': 0,\n  // Live Region Attributes\n  'aria-atomic': 0,\n  'aria-busy': 0,\n  'aria-live': 0,\n  'aria-relevant': 0,\n  // Drag-and-Drop Attributes\n  'aria-dropeffect': 0,\n  'aria-grabbed': 0,\n  // Relationship Attributes\n  'aria-activedescendant': 0,\n  'aria-colcount': 0,\n  'aria-colindex': 0,\n  'aria-colspan': 0,\n  'aria-controls': 0,\n  'aria-describedby': 0,\n  'aria-errormessage': 0,\n  'aria-flowto': 0,\n  'aria-labelledby': 0,\n  'aria-owns': 0,\n  'aria-posinset': 0,\n  'aria-rowcount': 0,\n  'aria-rowindex': 0,\n  'aria-rowspan': 0,\n  'aria-setsize': 0\n};\n\nvar warnedProperties = {};\nvar rARIA = new RegExp('^(aria)-[' + ATTRIBUTE_NAME_CHAR + ']*$');\nvar rARIACamel = new RegExp('^(aria)[A-Z][' + ATTRIBUTE_NAME_CHAR + ']*$');\nvar hasOwnProperty$1 = Object.prototype.hasOwnProperty;\n\nfunction validateProperty(tagName, name) {\n  {\n    if (hasOwnProperty$1.call(warnedProperties, name) && warnedProperties[name]) {\n      return true;\n    }\n\n    if (rARIACamel.test(name)) {\n      var ariaName = 'aria-' + name.slice(4).toLowerCase();\n      var correctName = ariaProperties.hasOwnProperty(ariaName) ? ariaName : null; // If this is an aria-* attribute, but is not listed in the known DOM\n      // DOM properties, then it is an invalid aria-* attribute.\n\n      if (correctName == null) {\n        error('Invalid ARIA attribute `%s`. ARIA attributes follow the pattern aria-* and must be lowercase.', name);\n\n        warnedProperties[name] = true;\n        return true;\n      } // aria-* attributes should be lowercase; suggest the lowercase version.\n\n\n      if (name !== correctName) {\n        error('Invalid ARIA attribute `%s`. Did you mean `%s`?', name, correctName);\n\n        warnedProperties[name] = true;\n        return true;\n      }\n    }\n\n    if (rARIA.test(name)) {\n      var lowerCasedName = name.toLowerCase();\n      var standardName = ariaProperties.hasOwnProperty(lowerCasedName) ? lowerCasedName : null; // If this is an aria-* attribute, but is not listed in the known DOM\n      // DOM properties, then it is an invalid aria-* attribute.\n\n      if (standardName == null) {\n        warnedProperties[name] = true;\n        return false;\n      } // aria-* attributes should be lowercase; suggest the lowercase version.\n\n\n      if (name !== standardName) {\n        error('Unknown ARIA attribute `%s`. Did you mean `%s`?', name, standardName);\n\n        warnedProperties[name] = true;\n        return true;\n      }\n    }\n  }\n\n  return true;\n}\n\nfunction warnInvalidARIAProps(type, props) {\n  {\n    var invalidProps = [];\n\n    for (var key in props) {\n      var isValid = validateProperty(type, key);\n\n      if (!isValid) {\n        invalidProps.push(key);\n      }\n    }\n\n    var unknownPropString = invalidProps.map(function (prop) {\n      return '`' + prop + '`';\n    }).join(', ');\n\n    if (invalidProps.length === 1) {\n      error('Invalid aria prop %s on <%s> tag. ' + 'For details, see https://reactjs.org/link/invalid-aria-props', unknownPropString, type);\n    } else if (invalidProps.length > 1) {\n      error('Invalid aria props %s on <%s> tag. ' + 'For details, see https://reactjs.org/link/invalid-aria-props', unknownPropString, type);\n    }\n  }\n}\n\nfunction validateProperties(type, props) {\n  if (isCustomComponent(type, props)) {\n    return;\n  }\n\n  warnInvalidARIAProps(type, props);\n}\n\nvar didWarnValueNull = false;\nfunction validateProperties$1(type, props) {\n  {\n    if (type !== 'input' && type !== 'textarea' && type !== 'select') {\n      return;\n    }\n\n    if (props != null && props.value === null && !didWarnValueNull) {\n      didWarnValueNull = true;\n\n      if (type === 'select' && props.multiple) {\n        error('`value` prop on `%s` should not be null. ' + 'Consider using an empty array when `multiple` is set to `true` ' + 'to clear the component or `undefined` for uncontrolled components.', type);\n      } else {\n        error('`value` prop on `%s` should not be null. ' + 'Consider using an empty string to clear the component or `undefined` ' + 'for uncontrolled components.', type);\n      }\n    }\n  }\n}\n\nvar validateProperty$1 = function () {};\n\n{\n  var warnedProperties$1 = {};\n  var _hasOwnProperty = Object.prototype.hasOwnProperty;\n  var EVENT_NAME_REGEX = /^on./;\n  var INVALID_EVENT_NAME_REGEX = /^on[^A-Z]/;\n  var rARIA$1 = new RegExp('^(aria)-[' + ATTRIBUTE_NAME_CHAR + ']*$');\n  var rARIACamel$1 = new RegExp('^(aria)[A-Z][' + ATTRIBUTE_NAME_CHAR + ']*$');\n\n  validateProperty$1 = function (tagName, name, value, eventRegistry) {\n    if (_hasOwnProperty.call(warnedProperties$1, name) && warnedProperties$1[name]) {\n      return true;\n    }\n\n    var lowerCasedName = name.toLowerCase();\n\n    if (lowerCasedName === 'onfocusin' || lowerCasedName === 'onfocusout') {\n      error('React uses onFocus and onBlur instead of onFocusIn and onFocusOut. ' + 'All React events are normalized to bubble, so onFocusIn and onFocusOut ' + 'are not needed/supported by React.');\n\n      warnedProperties$1[name] = true;\n      return true;\n    } // We can't rely on the event system being injected on the server.\n\n\n    if (eventRegistry != null) {\n      var registrationNameDependencies = eventRegistry.registrationNameDependencies,\n          possibleRegistrationNames = eventRegistry.possibleRegistrationNames;\n\n      if (registrationNameDependencies.hasOwnProperty(name)) {\n        return true;\n      }\n\n      var registrationName = possibleRegistrationNames.hasOwnProperty(lowerCasedName) ? possibleRegistrationNames[lowerCasedName] : null;\n\n      if (registrationName != null) {\n        error('Invalid event handler property `%s`. Did you mean `%s`?', name, registrationName);\n\n        warnedProperties$1[name] = true;\n        return true;\n      }\n\n      if (EVENT_NAME_REGEX.test(name)) {\n        error('Unknown event handler property `%s`. It will be ignored.', name);\n\n        warnedProperties$1[name] = true;\n        return true;\n      }\n    } else if (EVENT_NAME_REGEX.test(name)) {\n      // If no event plugins have been injected, we are in a server environment.\n      // So we can't tell if the event name is correct for sure, but we can filter\n      // out known bad ones like `onclick`. We can't suggest a specific replacement though.\n      if (INVALID_EVENT_NAME_REGEX.test(name)) {\n        error('Invalid event handler property `%s`. ' + 'React events use the camelCase naming convention, for example `onClick`.', name);\n      }\n\n      warnedProperties$1[name] = true;\n      return true;\n    } // Let the ARIA attribute hook validate ARIA attributes\n\n\n    if (rARIA$1.test(name) || rARIACamel$1.test(name)) {\n      return true;\n    }\n\n    if (lowerCasedName === 'innerhtml') {\n      error('Directly setting property `innerHTML` is not permitted. ' + 'For more information, lookup documentation on `dangerouslySetInnerHTML`.');\n\n      warnedProperties$1[name] = true;\n      return true;\n    }\n\n    if (lowerCasedName === 'aria') {\n      error('The `aria` attribute is reserved for future use in React. ' + 'Pass individual `aria-` attributes instead.');\n\n      warnedProperties$1[name] = true;\n      return true;\n    }\n\n    if (lowerCasedName === 'is' && value !== null && value !== undefined && typeof value !== 'string') {\n      error('Received a `%s` for a string attribute `is`. If this is expected, cast ' + 'the value to a string.', typeof value);\n\n      warnedProperties$1[name] = true;\n      return true;\n    }\n\n    if (typeof value === 'number' && isNaN(value)) {\n      error('Received NaN for the `%s` attribute. If this is expected, cast ' + 'the value to a string.', name);\n\n      warnedProperties$1[name] = true;\n      return true;\n    }\n\n    var propertyInfo = getPropertyInfo(name);\n    var isReserved = propertyInfo !== null && propertyInfo.type === RESERVED; // Known attributes should match the casing specified in the property config.\n\n    if (possibleStandardNames.hasOwnProperty(lowerCasedName)) {\n      var standardName = possibleStandardNames[lowerCasedName];\n\n      if (standardName !== name) {\n        error('Invalid DOM property `%s`. Did you mean `%s`?', name, standardName);\n\n        warnedProperties$1[name] = true;\n        return true;\n      }\n    } else if (!isReserved && name !== lowerCasedName) {\n      // Unknown attributes should have lowercase casing since that's how they\n      // will be cased anyway with server rendering.\n      error('React does not recognize the `%s` prop on a DOM element. If you ' + 'intentionally want it to appear in the DOM as a custom ' + 'attribute, spell it as lowercase `%s` instead. ' + 'If you accidentally passed it from a parent component, remove ' + 'it from the DOM element.', name, lowerCasedName);\n\n      warnedProperties$1[name] = true;\n      return true;\n    }\n\n    if (typeof value === 'boolean' && shouldRemoveAttributeWithWarning(name, value, propertyInfo, false)) {\n      if (value) {\n        error('Received `%s` for a non-boolean attribute `%s`.\\n\\n' + 'If you want to write it to the DOM, pass a string instead: ' + '%s=\"%s\" or %s={value.toString()}.', value, name, name, value, name);\n      } else {\n        error('Received `%s` for a non-boolean attribute `%s`.\\n\\n' + 'If you want to write it to the DOM, pass a string instead: ' + '%s=\"%s\" or %s={value.toString()}.\\n\\n' + 'If you used to conditionally omit it with %s={condition && value}, ' + 'pass %s={condition ? value : undefined} instead.', value, name, name, value, name, name, name);\n      }\n\n      warnedProperties$1[name] = true;\n      return true;\n    } // Now that we've validated casing, do not validate\n    // data types for reserved props\n\n\n    if (isReserved) {\n      return true;\n    } // Warn when a known attribute is a bad type\n\n\n    if (shouldRemoveAttributeWithWarning(name, value, propertyInfo, false)) {\n      warnedProperties$1[name] = true;\n      return false;\n    } // Warn when passing the strings 'false' or 'true' into a boolean prop\n\n\n    if ((value === 'false' || value === 'true') && propertyInfo !== null && propertyInfo.type === BOOLEAN) {\n      error('Received the string `%s` for the boolean attribute `%s`. ' + '%s ' + 'Did you mean %s={%s}?', value, name, value === 'false' ? 'The browser will interpret it as a truthy value.' : 'Although this works, it will not work as expected if you pass the string \"false\".', name, value);\n\n      warnedProperties$1[name] = true;\n      return true;\n    }\n\n    return true;\n  };\n}\n\nvar warnUnknownProperties = function (type, props, eventRegistry) {\n  {\n    var unknownProps = [];\n\n    for (var key in props) {\n      var isValid = validateProperty$1(type, key, props[key], eventRegistry);\n\n      if (!isValid) {\n        unknownProps.push(key);\n      }\n    }\n\n    var unknownPropString = unknownProps.map(function (prop) {\n      return '`' + prop + '`';\n    }).join(', ');\n\n    if (unknownProps.length === 1) {\n      error('Invalid value for prop %s on <%s> tag. Either remove it from the element, ' + 'or pass a string or number value to keep it in the DOM. ' + 'For details, see https://reactjs.org/link/attribute-behavior ', unknownPropString, type);\n    } else if (unknownProps.length > 1) {\n      error('Invalid values for props %s on <%s> tag. Either remove them from the element, ' + 'or pass a string or number value to keep them in the DOM. ' + 'For details, see https://reactjs.org/link/attribute-behavior ', unknownPropString, type);\n    }\n  }\n};\n\nfunction validateProperties$2(type, props, eventRegistry) {\n  if (isCustomComponent(type, props)) {\n    return;\n  }\n\n  warnUnknownProperties(type, props, eventRegistry);\n}\n\nvar IS_EVENT_HANDLE_NON_MANAGED_NODE = 1;\nvar IS_NON_DELEGATED = 1 << 1;\nvar IS_CAPTURE_PHASE = 1 << 2;\nvar IS_REPLAYED = 1 << 4;\n// set to LEGACY_FB_SUPPORT. LEGACY_FB_SUPPORT only gets set when\n// we call willDeferLaterForLegacyFBSupport, thus not bailing out\n// will result in endless cycles like an infinite loop.\n// We also don't want to defer during event replaying.\n\nvar SHOULD_NOT_PROCESS_POLYFILL_EVENT_PLUGINS = IS_EVENT_HANDLE_NON_MANAGED_NODE | IS_NON_DELEGATED | IS_CAPTURE_PHASE;\n\n/**\n * Gets the target node from a native browser event by accounting for\n * inconsistencies in browser DOM APIs.\n *\n * @param {object} nativeEvent Native browser event.\n * @return {DOMEventTarget} Target node.\n */\n\nfunction getEventTarget(nativeEvent) {\n  // Fallback to nativeEvent.srcElement for IE9\n  // https://github.com/facebook/react/issues/12506\n  var target = nativeEvent.target || nativeEvent.srcElement || window; // Normalize SVG <use> element events #4963\n\n  if (target.correspondingUseElement) {\n    target = target.correspondingUseElement;\n  } // Safari may fire events on text nodes (Node.TEXT_NODE is 3).\n  // @see http://www.quirksmode.org/js/events_properties.html\n\n\n  return target.nodeType === TEXT_NODE ? target.parentNode : target;\n}\n\nvar restoreImpl = null;\nvar restoreTarget = null;\nvar restoreQueue = null;\n\nfunction restoreStateOfTarget(target) {\n  // We perform this translation at the end of the event loop so that we\n  // always receive the correct fiber here\n  var internalInstance = getInstanceFromNode(target);\n\n  if (!internalInstance) {\n    // Unmounted\n    return;\n  }\n\n  if (!(typeof restoreImpl === 'function')) {\n    {\n      throw Error( \"setRestoreImplementation() needs to be called to handle a target for controlled events. This error is likely caused by a bug in React. Please file an issue.\" );\n    }\n  }\n\n  var stateNode = internalInstance.stateNode; // Guard against Fiber being unmounted.\n\n  if (stateNode) {\n    var _props = getFiberCurrentPropsFromNode(stateNode);\n\n    restoreImpl(internalInstance.stateNode, internalInstance.type, _props);\n  }\n}\n\nfunction setRestoreImplementation(impl) {\n  restoreImpl = impl;\n}\nfunction enqueueStateRestore(target) {\n  if (restoreTarget) {\n    if (restoreQueue) {\n      restoreQueue.push(target);\n    } else {\n      restoreQueue = [target];\n    }\n  } else {\n    restoreTarget = target;\n  }\n}\nfunction needsStateRestore() {\n  return restoreTarget !== null || restoreQueue !== null;\n}\nfunction restoreStateIfNeeded() {\n  if (!restoreTarget) {\n    return;\n  }\n\n  var target = restoreTarget;\n  var queuedTargets = restoreQueue;\n  restoreTarget = null;\n  restoreQueue = null;\n  restoreStateOfTarget(target);\n\n  if (queuedTargets) {\n    for (var i = 0; i < queuedTargets.length; i++) {\n      restoreStateOfTarget(queuedTargets[i]);\n    }\n  }\n}\n\n// the renderer. Such as when we're dispatching events or if third party\n// libraries need to call batchedUpdates. Eventually, this API will go away when\n// everything is batched by default. We'll then have a similar API to opt-out of\n// scheduled work and instead do synchronous work.\n// Defaults\n\nvar batchedUpdatesImpl = function (fn, bookkeeping) {\n  return fn(bookkeeping);\n};\n\nvar discreteUpdatesImpl = function (fn, a, b, c, d) {\n  return fn(a, b, c, d);\n};\n\nvar flushDiscreteUpdatesImpl = function () {};\n\nvar batchedEventUpdatesImpl = batchedUpdatesImpl;\nvar isInsideEventHandler = false;\nvar isBatchingEventUpdates = false;\n\nfunction finishEventHandler() {\n  // Here we wait until all updates have propagated, which is important\n  // when using controlled components within layers:\n  // https://github.com/facebook/react/issues/1698\n  // Then we restore state of any controlled component.\n  var controlledComponentsHavePendingUpdates = needsStateRestore();\n\n  if (controlledComponentsHavePendingUpdates) {\n    // If a controlled event was fired, we may need to restore the state of\n    // the DOM node back to the controlled value. This is necessary when React\n    // bails out of the update without touching the DOM.\n    flushDiscreteUpdatesImpl();\n    restoreStateIfNeeded();\n  }\n}\n\nfunction batchedUpdates(fn, bookkeeping) {\n  if (isInsideEventHandler) {\n    // If we are currently inside another batch, we need to wait until it\n    // fully completes before restoring state.\n    return fn(bookkeeping);\n  }\n\n  isInsideEventHandler = true;\n\n  try {\n    return batchedUpdatesImpl(fn, bookkeeping);\n  } finally {\n    isInsideEventHandler = false;\n    finishEventHandler();\n  }\n}\nfunction batchedEventUpdates(fn, a, b) {\n  if (isBatchingEventUpdates) {\n    // If we are currently inside another batch, we need to wait until it\n    // fully completes before restoring state.\n    return fn(a, b);\n  }\n\n  isBatchingEventUpdates = true;\n\n  try {\n    return batchedEventUpdatesImpl(fn, a, b);\n  } finally {\n    isBatchingEventUpdates = false;\n    finishEventHandler();\n  }\n}\nfunction discreteUpdates(fn, a, b, c, d) {\n  var prevIsInsideEventHandler = isInsideEventHandler;\n  isInsideEventHandler = true;\n\n  try {\n    return discreteUpdatesImpl(fn, a, b, c, d);\n  } finally {\n    isInsideEventHandler = prevIsInsideEventHandler;\n\n    if (!isInsideEventHandler) {\n      finishEventHandler();\n    }\n  }\n}\nfunction flushDiscreteUpdatesIfNeeded(timeStamp) {\n  {\n    if (!isInsideEventHandler) {\n      flushDiscreteUpdatesImpl();\n    }\n  }\n}\nfunction setBatchingImplementation(_batchedUpdatesImpl, _discreteUpdatesImpl, _flushDiscreteUpdatesImpl, _batchedEventUpdatesImpl) {\n  batchedUpdatesImpl = _batchedUpdatesImpl;\n  discreteUpdatesImpl = _discreteUpdatesImpl;\n  flushDiscreteUpdatesImpl = _flushDiscreteUpdatesImpl;\n  batchedEventUpdatesImpl = _batchedEventUpdatesImpl;\n}\n\nfunction isInteractive(tag) {\n  return tag === 'button' || tag === 'input' || tag === 'select' || tag === 'textarea';\n}\n\nfunction shouldPreventMouseEvent(name, type, props) {\n  switch (name) {\n    case 'onClick':\n    case 'onClickCapture':\n    case 'onDoubleClick':\n    case 'onDoubleClickCapture':\n    case 'onMouseDown':\n    case 'onMouseDownCapture':\n    case 'onMouseMove':\n    case 'onMouseMoveCapture':\n    case 'onMouseUp':\n    case 'onMouseUpCapture':\n    case 'onMouseEnter':\n      return !!(props.disabled && isInteractive(type));\n\n    default:\n      return false;\n  }\n}\n/**\n * @param {object} inst The instance, which is the source of events.\n * @param {string} registrationName Name of listener (e.g. `onClick`).\n * @return {?function} The stored callback.\n */\n\n\nfunction getListener(inst, registrationName) {\n  var stateNode = inst.stateNode;\n\n  if (stateNode === null) {\n    // Work in progress (ex: onload events in incremental mode).\n    return null;\n  }\n\n  var props = getFiberCurrentPropsFromNode(stateNode);\n\n  if (props === null) {\n    // Work in progress.\n    return null;\n  }\n\n  var listener = props[registrationName];\n\n  if (shouldPreventMouseEvent(registrationName, inst.type, props)) {\n    return null;\n  }\n\n  if (!(!listener || typeof listener === 'function')) {\n    {\n      throw Error( \"Expected `\" + registrationName + \"` listener to be a function, instead got a value of `\" + typeof listener + \"` type.\" );\n    }\n  }\n\n  return listener;\n}\n\nvar passiveBrowserEventsSupported = false; // Check if browser support events with passive listeners\n// https://developer.mozilla.org/en-US/docs/Web/API/EventTarget/addEventListener#Safely_detecting_option_support\n\nif (canUseDOM) {\n  try {\n    var options = {}; // $FlowFixMe: Ignore Flow complaining about needing a value\n\n    Object.defineProperty(options, 'passive', {\n      get: function () {\n        passiveBrowserEventsSupported = true;\n      }\n    });\n    window.addEventListener('test', options, options);\n    window.removeEventListener('test', options, options);\n  } catch (e) {\n    passiveBrowserEventsSupported = false;\n  }\n}\n\nfunction invokeGuardedCallbackProd(name, func, context, a, b, c, d, e, f) {\n  var funcArgs = Array.prototype.slice.call(arguments, 3);\n\n  try {\n    func.apply(context, funcArgs);\n  } catch (error) {\n    this.onError(error);\n  }\n}\n\nvar invokeGuardedCallbackImpl = invokeGuardedCallbackProd;\n\n{\n  // In DEV mode, we swap out invokeGuardedCallback for a special version\n  // that plays more nicely with the browser's DevTools. The idea is to preserve\n  // \"Pause on exceptions\" behavior. Because React wraps all user-provided\n  // functions in invokeGuardedCallback, and the production version of\n  // invokeGuardedCallback uses a try-catch, all user exceptions are treated\n  // like caught exceptions, and the DevTools won't pause unless the developer\n  // takes the extra step of enabling pause on caught exceptions. This is\n  // unintuitive, though, because even though React has caught the error, from\n  // the developer's perspective, the error is uncaught.\n  //\n  // To preserve the expected \"Pause on exceptions\" behavior, we don't use a\n  // try-catch in DEV. Instead, we synchronously dispatch a fake event to a fake\n  // DOM node, and call the user-provided callback from inside an event handler\n  // for that fake event. If the callback throws, the error is \"captured\" using\n  // a global event handler. But because the error happens in a different\n  // event loop context, it does not interrupt the normal program flow.\n  // Effectively, this gives us try-catch behavior without actually using\n  // try-catch. Neat!\n  // Check that the browser supports the APIs we need to implement our special\n  // DEV version of invokeGuardedCallback\n  if (typeof window !== 'undefined' && typeof window.dispatchEvent === 'function' && typeof document !== 'undefined' && typeof document.createEvent === 'function') {\n    var fakeNode = document.createElement('react');\n\n    invokeGuardedCallbackImpl = function invokeGuardedCallbackDev(name, func, context, a, b, c, d, e, f) {\n      // If document doesn't exist we know for sure we will crash in this method\n      // when we call document.createEvent(). However this can cause confusing\n      // errors: https://github.com/facebookincubator/create-react-app/issues/3482\n      // So we preemptively throw with a better message instead.\n      if (!(typeof document !== 'undefined')) {\n        {\n          throw Error( \"The `document` global was defined when React was initialized, but is not defined anymore. This can happen in a test environment if a component schedules an update from an asynchronous callback, but the test has already finished running. To solve this, you can either unmount the component at the end of your test (and ensure that any asynchronous operations get canceled in `componentWillUnmount`), or you can change the test itself to be asynchronous.\" );\n        }\n      }\n\n      var evt = document.createEvent('Event');\n      var didCall = false; // Keeps track of whether the user-provided callback threw an error. We\n      // set this to true at the beginning, then set it to false right after\n      // calling the function. If the function errors, `didError` will never be\n      // set to false. This strategy works even if the browser is flaky and\n      // fails to call our global error handler, because it doesn't rely on\n      // the error event at all.\n\n      var didError = true; // Keeps track of the value of window.event so that we can reset it\n      // during the callback to let user code access window.event in the\n      // browsers that support it.\n\n      var windowEvent = window.event; // Keeps track of the descriptor of window.event to restore it after event\n      // dispatching: https://github.com/facebook/react/issues/13688\n\n      var windowEventDescriptor = Object.getOwnPropertyDescriptor(window, 'event');\n\n      function restoreAfterDispatch() {\n        // We immediately remove the callback from event listeners so that\n        // nested `invokeGuardedCallback` calls do not clash. Otherwise, a\n        // nested call would trigger the fake event handlers of any call higher\n        // in the stack.\n        fakeNode.removeEventListener(evtType, callCallback, false); // We check for window.hasOwnProperty('event') to prevent the\n        // window.event assignment in both IE <= 10 as they throw an error\n        // \"Member not found\" in strict mode, and in Firefox which does not\n        // support window.event.\n\n        if (typeof window.event !== 'undefined' && window.hasOwnProperty('event')) {\n          window.event = windowEvent;\n        }\n      } // Create an event handler for our fake event. We will synchronously\n      // dispatch our fake event using `dispatchEvent`. Inside the handler, we\n      // call the user-provided callback.\n\n\n      var funcArgs = Array.prototype.slice.call(arguments, 3);\n\n      function callCallback() {\n        didCall = true;\n        restoreAfterDispatch();\n        func.apply(context, funcArgs);\n        didError = false;\n      } // Create a global error event handler. We use this to capture the value\n      // that was thrown. It's possible that this error handler will fire more\n      // than once; for example, if non-React code also calls `dispatchEvent`\n      // and a handler for that event throws. We should be resilient to most of\n      // those cases. Even if our error event handler fires more than once, the\n      // last error event is always used. If the callback actually does error,\n      // we know that the last error event is the correct one, because it's not\n      // possible for anything else to have happened in between our callback\n      // erroring and the code that follows the `dispatchEvent` call below. If\n      // the callback doesn't error, but the error event was fired, we know to\n      // ignore it because `didError` will be false, as described above.\n\n\n      var error; // Use this to track whether the error event is ever called.\n\n      var didSetError = false;\n      var isCrossOriginError = false;\n\n      function handleWindowError(event) {\n        error = event.error;\n        didSetError = true;\n\n        if (error === null && event.colno === 0 && event.lineno === 0) {\n          isCrossOriginError = true;\n        }\n\n        if (event.defaultPrevented) {\n          // Some other error handler has prevented default.\n          // Browsers silence the error report if this happens.\n          // We'll remember this to later decide whether to log it or not.\n          if (error != null && typeof error === 'object') {\n            try {\n              error._suppressLogging = true;\n            } catch (inner) {// Ignore.\n            }\n          }\n        }\n      } // Create a fake event type.\n\n\n      var evtType = \"react-\" + (name ? name : 'invokeguardedcallback'); // Attach our event handlers\n\n      window.addEventListener('error', handleWindowError);\n      fakeNode.addEventListener(evtType, callCallback, false); // Synchronously dispatch our fake event. If the user-provided function\n      // errors, it will trigger our global error handler.\n\n      evt.initEvent(evtType, false, false);\n      fakeNode.dispatchEvent(evt);\n\n      if (windowEventDescriptor) {\n        Object.defineProperty(window, 'event', windowEventDescriptor);\n      }\n\n      if (didCall && didError) {\n        if (!didSetError) {\n          // The callback errored, but the error event never fired.\n          error = new Error('An error was thrown inside one of your components, but React ' + \"doesn't know what it was. This is likely due to browser \" + 'flakiness. React does its best to preserve the \"Pause on ' + 'exceptions\" behavior of the DevTools, which requires some ' + \"DEV-mode only tricks. It's possible that these don't work in \" + 'your browser. Try triggering the error in production mode, ' + 'or switching to a modern browser. If you suspect that this is ' + 'actually an issue with React, please file an issue.');\n        } else if (isCrossOriginError) {\n          error = new Error(\"A cross-origin error was thrown. React doesn't have access to \" + 'the actual error object in development. ' + 'See https://reactjs.org/link/crossorigin-error for more information.');\n        }\n\n        this.onError(error);\n      } // Remove our event listeners\n\n\n      window.removeEventListener('error', handleWindowError);\n\n      if (!didCall) {\n        // Something went really wrong, and our event was not dispatched.\n        // https://github.com/facebook/react/issues/16734\n        // https://github.com/facebook/react/issues/16585\n        // Fall back to the production implementation.\n        restoreAfterDispatch();\n        return invokeGuardedCallbackProd.apply(this, arguments);\n      }\n    };\n  }\n}\n\nvar invokeGuardedCallbackImpl$1 = invokeGuardedCallbackImpl;\n\nvar hasError = false;\nvar caughtError = null; // Used by event system to capture/rethrow the first error.\n\nvar hasRethrowError = false;\nvar rethrowError = null;\nvar reporter = {\n  onError: function (error) {\n    hasError = true;\n    caughtError = error;\n  }\n};\n/**\n * Call a function while guarding against errors that happens within it.\n * Returns an error if it throws, otherwise null.\n *\n * In production, this is implemented using a try-catch. The reason we don't\n * use a try-catch directly is so that we can swap out a different\n * implementation in DEV mode.\n *\n * @param {String} name of the guard to use for logging or debugging\n * @param {Function} func The function to invoke\n * @param {*} context The context to use when calling the function\n * @param {...*} args Arguments for function\n */\n\nfunction invokeGuardedCallback(name, func, context, a, b, c, d, e, f) {\n  hasError = false;\n  caughtError = null;\n  invokeGuardedCallbackImpl$1.apply(reporter, arguments);\n}\n/**\n * Same as invokeGuardedCallback, but instead of returning an error, it stores\n * it in a global so it can be rethrown by `rethrowCaughtError` later.\n * TODO: See if caughtError and rethrowError can be unified.\n *\n * @param {String} name of the guard to use for logging or debugging\n * @param {Function} func The function to invoke\n * @param {*} context The context to use when calling the function\n * @param {...*} args Arguments for function\n */\n\nfunction invokeGuardedCallbackAndCatchFirstError(name, func, context, a, b, c, d, e, f) {\n  invokeGuardedCallback.apply(this, arguments);\n\n  if (hasError) {\n    var error = clearCaughtError();\n\n    if (!hasRethrowError) {\n      hasRethrowError = true;\n      rethrowError = error;\n    }\n  }\n}\n/**\n * During execution of guarded functions we will capture the first error which\n * we will rethrow to be handled by the top level error handler.\n */\n\nfunction rethrowCaughtError() {\n  if (hasRethrowError) {\n    var error = rethrowError;\n    hasRethrowError = false;\n    rethrowError = null;\n    throw error;\n  }\n}\nfunction hasCaughtError() {\n  return hasError;\n}\nfunction clearCaughtError() {\n  if (hasError) {\n    var error = caughtError;\n    hasError = false;\n    caughtError = null;\n    return error;\n  } else {\n    {\n      {\n        throw Error( \"clearCaughtError was called but no error was captured. This error is likely caused by a bug in React. Please file an issue.\" );\n      }\n    }\n  }\n}\n\n/**\n * `ReactInstanceMap` maintains a mapping from a public facing stateful\n * instance (key) and the internal representation (value). This allows public\n * methods to accept the user facing instance as an argument and map them back\n * to internal methods.\n *\n * Note that this module is currently shared and assumed to be stateless.\n * If this becomes an actual Map, that will break.\n */\nfunction get(key) {\n  return key._reactInternals;\n}\nfunction has(key) {\n  return key._reactInternals !== undefined;\n}\nfunction set(key, value) {\n  key._reactInternals = value;\n}\n\n// Don't change these two values. They're used by React Dev Tools.\nvar NoFlags =\n/*                      */\n0;\nvar PerformedWork =\n/*                */\n1; // You can change the rest (and add more).\n\nvar Placement =\n/*                    */\n2;\nvar Update =\n/*                       */\n4;\nvar PlacementAndUpdate =\n/*           */\n6;\nvar Deletion =\n/*                     */\n8;\nvar ContentReset =\n/*                 */\n16;\nvar Callback =\n/*                     */\n32;\nvar DidCapture =\n/*                   */\n64;\nvar Ref =\n/*                          */\n128;\nvar Snapshot =\n/*                     */\n256;\nvar Passive =\n/*                      */\n512; // TODO (effects) Remove this bit once the new reconciler is synced to the old.\n\nvar PassiveUnmountPendingDev =\n/*     */\n8192;\nvar Hydrating =\n/*                    */\n1024;\nvar HydratingAndUpdate =\n/*           */\n1028; // Passive & Update & Callback & Ref & Snapshot\n\nvar LifecycleEffectMask =\n/*          */\n932; // Union of all host effects\n\nvar HostEffectMask =\n/*               */\n2047; // These are not really side effects, but we still reuse this field.\n\nvar Incomplete =\n/*                   */\n2048;\nvar ShouldCapture =\n/*                */\n4096;\nvar ForceUpdateForLegacySuspense =\n/* */\n16384; // Static tags describe aspects of a fiber that are not specific to a render,\n\nvar ReactCurrentOwner = ReactSharedInternals.ReactCurrentOwner;\nfunction getNearestMountedFiber(fiber) {\n  var node = fiber;\n  var nearestMounted = fiber;\n\n  if (!fiber.alternate) {\n    // If there is no alternate, this might be a new tree that isn't inserted\n    // yet. If it is, then it will have a pending insertion effect on it.\n    var nextNode = node;\n\n    do {\n      node = nextNode;\n\n      if ((node.flags & (Placement | Hydrating)) !== NoFlags) {\n        // This is an insertion or in-progress hydration. The nearest possible\n        // mounted fiber is the parent but we need to continue to figure out\n        // if that one is still mounted.\n        nearestMounted = node.return;\n      }\n\n      nextNode = node.return;\n    } while (nextNode);\n  } else {\n    while (node.return) {\n      node = node.return;\n    }\n  }\n\n  if (node.tag === HostRoot) {\n    // TODO: Check if this was a nested HostRoot when used with\n    // renderContainerIntoSubtree.\n    return nearestMounted;\n  } // If we didn't hit the root, that means that we're in an disconnected tree\n  // that has been unmounted.\n\n\n  return null;\n}\nfunction getSuspenseInstanceFromFiber(fiber) {\n  if (fiber.tag === SuspenseComponent) {\n    var suspenseState = fiber.memoizedState;\n\n    if (suspenseState === null) {\n      var current = fiber.alternate;\n\n      if (current !== null) {\n        suspenseState = current.memoizedState;\n      }\n    }\n\n    if (suspenseState !== null) {\n      return suspenseState.dehydrated;\n    }\n  }\n\n  return null;\n}\nfunction getContainerFromFiber(fiber) {\n  return fiber.tag === HostRoot ? fiber.stateNode.containerInfo : null;\n}\nfunction isFiberMounted(fiber) {\n  return getNearestMountedFiber(fiber) === fiber;\n}\nfunction isMounted(component) {\n  {\n    var owner = ReactCurrentOwner.current;\n\n    if (owner !== null && owner.tag === ClassComponent) {\n      var ownerFiber = owner;\n      var instance = ownerFiber.stateNode;\n\n      if (!instance._warnedAboutRefsInRender) {\n        error('%s is accessing isMounted inside its render() function. ' + 'render() should be a pure function of props and state. It should ' + 'never access something that requires stale data from the previous ' + 'render, such as refs. Move this logic to componentDidMount and ' + 'componentDidUpdate instead.', getComponentName(ownerFiber.type) || 'A component');\n      }\n\n      instance._warnedAboutRefsInRender = true;\n    }\n  }\n\n  var fiber = get(component);\n\n  if (!fiber) {\n    return false;\n  }\n\n  return getNearestMountedFiber(fiber) === fiber;\n}\n\nfunction assertIsMounted(fiber) {\n  if (!(getNearestMountedFiber(fiber) === fiber)) {\n    {\n      throw Error( \"Unable to find node on an unmounted component.\" );\n    }\n  }\n}\n\nfunction findCurrentFiberUsingSlowPath(fiber) {\n  var alternate = fiber.alternate;\n\n  if (!alternate) {\n    // If there is no alternate, then we only need to check if it is mounted.\n    var nearestMounted = getNearestMountedFiber(fiber);\n\n    if (!(nearestMounted !== null)) {\n      {\n        throw Error( \"Unable to find node on an unmounted component.\" );\n      }\n    }\n\n    if (nearestMounted !== fiber) {\n      return null;\n    }\n\n    return fiber;\n  } // If we have two possible branches, we'll walk backwards up to the root\n  // to see what path the root points to. On the way we may hit one of the\n  // special cases and we'll deal with them.\n\n\n  var a = fiber;\n  var b = alternate;\n\n  while (true) {\n    var parentA = a.return;\n\n    if (parentA === null) {\n      // We're at the root.\n      break;\n    }\n\n    var parentB = parentA.alternate;\n\n    if (parentB === null) {\n      // There is no alternate. This is an unusual case. Currently, it only\n      // happens when a Suspense component is hidden. An extra fragment fiber\n      // is inserted in between the Suspense fiber and its children. Skip\n      // over this extra fragment fiber and proceed to the next parent.\n      var nextParent = parentA.return;\n\n      if (nextParent !== null) {\n        a = b = nextParent;\n        continue;\n      } // If there's no parent, we're at the root.\n\n\n      break;\n    } // If both copies of the parent fiber point to the same child, we can\n    // assume that the child is current. This happens when we bailout on low\n    // priority: the bailed out fiber's child reuses the current child.\n\n\n    if (parentA.child === parentB.child) {\n      var child = parentA.child;\n\n      while (child) {\n        if (child === a) {\n          // We've determined that A is the current branch.\n          assertIsMounted(parentA);\n          return fiber;\n        }\n\n        if (child === b) {\n          // We've determined that B is the current branch.\n          assertIsMounted(parentA);\n          return alternate;\n        }\n\n        child = child.sibling;\n      } // We should never have an alternate for any mounting node. So the only\n      // way this could possibly happen is if this was unmounted, if at all.\n\n\n      {\n        {\n          throw Error( \"Unable to find node on an unmounted component.\" );\n        }\n      }\n    }\n\n    if (a.return !== b.return) {\n      // The return pointer of A and the return pointer of B point to different\n      // fibers. We assume that return pointers never criss-cross, so A must\n      // belong to the child set of A.return, and B must belong to the child\n      // set of B.return.\n      a = parentA;\n      b = parentB;\n    } else {\n      // The return pointers point to the same fiber. We'll have to use the\n      // default, slow path: scan the child sets of each parent alternate to see\n      // which child belongs to which set.\n      //\n      // Search parent A's child set\n      var didFindChild = false;\n      var _child = parentA.child;\n\n      while (_child) {\n        if (_child === a) {\n          didFindChild = true;\n          a = parentA;\n          b = parentB;\n          break;\n        }\n\n        if (_child === b) {\n          didFindChild = true;\n          b = parentA;\n          a = parentB;\n          break;\n        }\n\n        _child = _child.sibling;\n      }\n\n      if (!didFindChild) {\n        // Search parent B's child set\n        _child = parentB.child;\n\n        while (_child) {\n          if (_child === a) {\n            didFindChild = true;\n            a = parentB;\n            b = parentA;\n            break;\n          }\n\n          if (_child === b) {\n            didFindChild = true;\n            b = parentB;\n            a = parentA;\n            break;\n          }\n\n          _child = _child.sibling;\n        }\n\n        if (!didFindChild) {\n          {\n            throw Error( \"Child was not found in either parent set. This indicates a bug in React related to the return pointer. Please file an issue.\" );\n          }\n        }\n      }\n    }\n\n    if (!(a.alternate === b)) {\n      {\n        throw Error( \"Return fibers should always be each others' alternates. This error is likely caused by a bug in React. Please file an issue.\" );\n      }\n    }\n  } // If the root is not a host container, we're in a disconnected tree. I.e.\n  // unmounted.\n\n\n  if (!(a.tag === HostRoot)) {\n    {\n      throw Error( \"Unable to find node on an unmounted component.\" );\n    }\n  }\n\n  if (a.stateNode.current === a) {\n    // We've determined that A is the current branch.\n    return fiber;\n  } // Otherwise B has to be current branch.\n\n\n  return alternate;\n}\nfunction findCurrentHostFiber(parent) {\n  var currentParent = findCurrentFiberUsingSlowPath(parent);\n\n  if (!currentParent) {\n    return null;\n  } // Next we'll drill down this component to find the first HostComponent/Text.\n\n\n  var node = currentParent;\n\n  while (true) {\n    if (node.tag === HostComponent || node.tag === HostText) {\n      return node;\n    } else if (node.child) {\n      node.child.return = node;\n      node = node.child;\n      continue;\n    }\n\n    if (node === currentParent) {\n      return null;\n    }\n\n    while (!node.sibling) {\n      if (!node.return || node.return === currentParent) {\n        return null;\n      }\n\n      node = node.return;\n    }\n\n    node.sibling.return = node.return;\n    node = node.sibling;\n  } // Flow needs the return null here, but ESLint complains about it.\n  // eslint-disable-next-line no-unreachable\n\n\n  return null;\n}\nfunction findCurrentHostFiberWithNoPortals(parent) {\n  var currentParent = findCurrentFiberUsingSlowPath(parent);\n\n  if (!currentParent) {\n    return null;\n  } // Next we'll drill down this component to find the first HostComponent/Text.\n\n\n  var node = currentParent;\n\n  while (true) {\n    if (node.tag === HostComponent || node.tag === HostText || enableFundamentalAPI ) {\n      return node;\n    } else if (node.child && node.tag !== HostPortal) {\n      node.child.return = node;\n      node = node.child;\n      continue;\n    }\n\n    if (node === currentParent) {\n      return null;\n    }\n\n    while (!node.sibling) {\n      if (!node.return || node.return === currentParent) {\n        return null;\n      }\n\n      node = node.return;\n    }\n\n    node.sibling.return = node.return;\n    node = node.sibling;\n  } // Flow needs the return null here, but ESLint complains about it.\n  // eslint-disable-next-line no-unreachable\n\n\n  return null;\n}\nfunction doesFiberContain(parentFiber, childFiber) {\n  var node = childFiber;\n  var parentFiberAlternate = parentFiber.alternate;\n\n  while (node !== null) {\n    if (node === parentFiber || node === parentFiberAlternate) {\n      return true;\n    }\n\n    node = node.return;\n  }\n\n  return false;\n}\n\nvar attemptUserBlockingHydration;\nfunction setAttemptUserBlockingHydration(fn) {\n  attemptUserBlockingHydration = fn;\n}\nvar attemptContinuousHydration;\nfunction setAttemptContinuousHydration(fn) {\n  attemptContinuousHydration = fn;\n}\nvar attemptHydrationAtCurrentPriority;\nfunction setAttemptHydrationAtCurrentPriority(fn) {\n  attemptHydrationAtCurrentPriority = fn;\n}\nvar attemptHydrationAtPriority;\nfunction setAttemptHydrationAtPriority(fn) {\n  attemptHydrationAtPriority = fn;\n} // TODO: Upgrade this definition once we're on a newer version of Flow that\nvar hasScheduledReplayAttempt = false; // The queue of discrete events to be replayed.\n\nvar queuedDiscreteEvents = []; // Indicates if any continuous event targets are non-null for early bailout.\n// if the last target was dehydrated.\n\nvar queuedFocus = null;\nvar queuedDrag = null;\nvar queuedMouse = null; // For pointer events there can be one latest event per pointerId.\n\nvar queuedPointers = new Map();\nvar queuedPointerCaptures = new Map(); // We could consider replaying selectionchange and touchmoves too.\n\nvar queuedExplicitHydrationTargets = [];\nfunction hasQueuedDiscreteEvents() {\n  return queuedDiscreteEvents.length > 0;\n}\nvar discreteReplayableEvents = ['mousedown', 'mouseup', 'touchcancel', 'touchend', 'touchstart', 'auxclick', 'dblclick', 'pointercancel', 'pointerdown', 'pointerup', 'dragend', 'dragstart', 'drop', 'compositionend', 'compositionstart', 'keydown', 'keypress', 'keyup', 'input', 'textInput', // Intentionally camelCase\n'copy', 'cut', 'paste', 'click', 'change', 'contextmenu', 'reset', 'submit'];\nfunction isReplayableDiscreteEvent(eventType) {\n  return discreteReplayableEvents.indexOf(eventType) > -1;\n}\n\nfunction createQueuedReplayableEvent(blockedOn, domEventName, eventSystemFlags, targetContainer, nativeEvent) {\n  return {\n    blockedOn: blockedOn,\n    domEventName: domEventName,\n    eventSystemFlags: eventSystemFlags | IS_REPLAYED,\n    nativeEvent: nativeEvent,\n    targetContainers: [targetContainer]\n  };\n}\n\nfunction queueDiscreteEvent(blockedOn, domEventName, eventSystemFlags, targetContainer, nativeEvent) {\n  var queuedEvent = createQueuedReplayableEvent(blockedOn, domEventName, eventSystemFlags, targetContainer, nativeEvent);\n  queuedDiscreteEvents.push(queuedEvent);\n} // Resets the replaying for this type of continuous event to no event.\n\nfunction clearIfContinuousEvent(domEventName, nativeEvent) {\n  switch (domEventName) {\n    case 'focusin':\n    case 'focusout':\n      queuedFocus = null;\n      break;\n\n    case 'dragenter':\n    case 'dragleave':\n      queuedDrag = null;\n      break;\n\n    case 'mouseover':\n    case 'mouseout':\n      queuedMouse = null;\n      break;\n\n    case 'pointerover':\n    case 'pointerout':\n      {\n        var pointerId = nativeEvent.pointerId;\n        queuedPointers.delete(pointerId);\n        break;\n      }\n\n    case 'gotpointercapture':\n    case 'lostpointercapture':\n      {\n        var _pointerId = nativeEvent.pointerId;\n        queuedPointerCaptures.delete(_pointerId);\n        break;\n      }\n  }\n}\n\nfunction accumulateOrCreateContinuousQueuedReplayableEvent(existingQueuedEvent, blockedOn, domEventName, eventSystemFlags, targetContainer, nativeEvent) {\n  if (existingQueuedEvent === null || existingQueuedEvent.nativeEvent !== nativeEvent) {\n    var queuedEvent = createQueuedReplayableEvent(blockedOn, domEventName, eventSystemFlags, targetContainer, nativeEvent);\n\n    if (blockedOn !== null) {\n      var _fiber2 = getInstanceFromNode(blockedOn);\n\n      if (_fiber2 !== null) {\n        // Attempt to increase the priority of this target.\n        attemptContinuousHydration(_fiber2);\n      }\n    }\n\n    return queuedEvent;\n  } // If we have already queued this exact event, then it's because\n  // the different event systems have different DOM event listeners.\n  // We can accumulate the flags, and the targetContainers, and\n  // store a single event to be replayed.\n\n\n  existingQueuedEvent.eventSystemFlags |= eventSystemFlags;\n  var targetContainers = existingQueuedEvent.targetContainers;\n\n  if (targetContainer !== null && targetContainers.indexOf(targetContainer) === -1) {\n    targetContainers.push(targetContainer);\n  }\n\n  return existingQueuedEvent;\n}\n\nfunction queueIfContinuousEvent(blockedOn, domEventName, eventSystemFlags, targetContainer, nativeEvent) {\n  // These set relatedTarget to null because the replayed event will be treated as if we\n  // moved from outside the window (no target) onto the target once it hydrates.\n  // Instead of mutating we could clone the event.\n  switch (domEventName) {\n    case 'focusin':\n      {\n        var focusEvent = nativeEvent;\n        queuedFocus = accumulateOrCreateContinuousQueuedReplayableEvent(queuedFocus, blockedOn, domEventName, eventSystemFlags, targetContainer, focusEvent);\n        return true;\n      }\n\n    case 'dragenter':\n      {\n        var dragEvent = nativeEvent;\n        queuedDrag = accumulateOrCreateContinuousQueuedReplayableEvent(queuedDrag, blockedOn, domEventName, eventSystemFlags, targetContainer, dragEvent);\n        return true;\n      }\n\n    case 'mouseover':\n      {\n        var mouseEvent = nativeEvent;\n        queuedMouse = accumulateOrCreateContinuousQueuedReplayableEvent(queuedMouse, blockedOn, domEventName, eventSystemFlags, targetContainer, mouseEvent);\n        return true;\n      }\n\n    case 'pointerover':\n      {\n        var pointerEvent = nativeEvent;\n        var pointerId = pointerEvent.pointerId;\n        queuedPointers.set(pointerId, accumulateOrCreateContinuousQueuedReplayableEvent(queuedPointers.get(pointerId) || null, blockedOn, domEventName, eventSystemFlags, targetContainer, pointerEvent));\n        return true;\n      }\n\n    case 'gotpointercapture':\n      {\n        var _pointerEvent = nativeEvent;\n        var _pointerId2 = _pointerEvent.pointerId;\n        queuedPointerCaptures.set(_pointerId2, accumulateOrCreateContinuousQueuedReplayableEvent(queuedPointerCaptures.get(_pointerId2) || null, blockedOn, domEventName, eventSystemFlags, targetContainer, _pointerEvent));\n        return true;\n      }\n  }\n\n  return false;\n} // Check if this target is unblocked. Returns true if it's unblocked.\n\nfunction attemptExplicitHydrationTarget(queuedTarget) {\n  // TODO: This function shares a lot of logic with attemptToDispatchEvent.\n  // Try to unify them. It's a bit tricky since it would require two return\n  // values.\n  var targetInst = getClosestInstanceFromNode(queuedTarget.target);\n\n  if (targetInst !== null) {\n    var nearestMounted = getNearestMountedFiber(targetInst);\n\n    if (nearestMounted !== null) {\n      var tag = nearestMounted.tag;\n\n      if (tag === SuspenseComponent) {\n        var instance = getSuspenseInstanceFromFiber(nearestMounted);\n\n        if (instance !== null) {\n          // We're blocked on hydrating this boundary.\n          // Increase its priority.\n          queuedTarget.blockedOn = instance;\n          attemptHydrationAtPriority(queuedTarget.lanePriority, function () {\n            Scheduler.unstable_runWithPriority(queuedTarget.priority, function () {\n              attemptHydrationAtCurrentPriority(nearestMounted);\n            });\n          });\n          return;\n        }\n      } else if (tag === HostRoot) {\n        var root = nearestMounted.stateNode;\n\n        if (root.hydrate) {\n          queuedTarget.blockedOn = getContainerFromFiber(nearestMounted); // We don't currently have a way to increase the priority of\n          // a root other than sync.\n\n          return;\n        }\n      }\n    }\n  }\n\n  queuedTarget.blockedOn = null;\n}\n\nfunction attemptReplayContinuousQueuedEvent(queuedEvent) {\n  if (queuedEvent.blockedOn !== null) {\n    return false;\n  }\n\n  var targetContainers = queuedEvent.targetContainers;\n\n  while (targetContainers.length > 0) {\n    var targetContainer = targetContainers[0];\n    var nextBlockedOn = attemptToDispatchEvent(queuedEvent.domEventName, queuedEvent.eventSystemFlags, targetContainer, queuedEvent.nativeEvent);\n\n    if (nextBlockedOn !== null) {\n      // We're still blocked. Try again later.\n      var _fiber3 = getInstanceFromNode(nextBlockedOn);\n\n      if (_fiber3 !== null) {\n        attemptContinuousHydration(_fiber3);\n      }\n\n      queuedEvent.blockedOn = nextBlockedOn;\n      return false;\n    } // This target container was successfully dispatched. Try the next.\n\n\n    targetContainers.shift();\n  }\n\n  return true;\n}\n\nfunction attemptReplayContinuousQueuedEventInMap(queuedEvent, key, map) {\n  if (attemptReplayContinuousQueuedEvent(queuedEvent)) {\n    map.delete(key);\n  }\n}\n\nfunction replayUnblockedEvents() {\n  hasScheduledReplayAttempt = false; // First replay discrete events.\n\n  while (queuedDiscreteEvents.length > 0) {\n    var nextDiscreteEvent = queuedDiscreteEvents[0];\n\n    if (nextDiscreteEvent.blockedOn !== null) {\n      // We're still blocked.\n      // Increase the priority of this boundary to unblock\n      // the next discrete event.\n      var _fiber4 = getInstanceFromNode(nextDiscreteEvent.blockedOn);\n\n      if (_fiber4 !== null) {\n        attemptUserBlockingHydration(_fiber4);\n      }\n\n      break;\n    }\n\n    var targetContainers = nextDiscreteEvent.targetContainers;\n\n    while (targetContainers.length > 0) {\n      var targetContainer = targetContainers[0];\n      var nextBlockedOn = attemptToDispatchEvent(nextDiscreteEvent.domEventName, nextDiscreteEvent.eventSystemFlags, targetContainer, nextDiscreteEvent.nativeEvent);\n\n      if (nextBlockedOn !== null) {\n        // We're still blocked. Try again later.\n        nextDiscreteEvent.blockedOn = nextBlockedOn;\n        break;\n      } // This target container was successfully dispatched. Try the next.\n\n\n      targetContainers.shift();\n    }\n\n    if (nextDiscreteEvent.blockedOn === null) {\n      // We've successfully replayed the first event. Let's try the next one.\n      queuedDiscreteEvents.shift();\n    }\n  } // Next replay any continuous events.\n\n\n  if (queuedFocus !== null && attemptReplayContinuousQueuedEvent(queuedFocus)) {\n    queuedFocus = null;\n  }\n\n  if (queuedDrag !== null && attemptReplayContinuousQueuedEvent(queuedDrag)) {\n    queuedDrag = null;\n  }\n\n  if (queuedMouse !== null && attemptReplayContinuousQueuedEvent(queuedMouse)) {\n    queuedMouse = null;\n  }\n\n  queuedPointers.forEach(attemptReplayContinuousQueuedEventInMap);\n  queuedPointerCaptures.forEach(attemptReplayContinuousQueuedEventInMap);\n}\n\nfunction scheduleCallbackIfUnblocked(queuedEvent, unblocked) {\n  if (queuedEvent.blockedOn === unblocked) {\n    queuedEvent.blockedOn = null;\n\n    if (!hasScheduledReplayAttempt) {\n      hasScheduledReplayAttempt = true; // Schedule a callback to attempt replaying as many events as are\n      // now unblocked. This first might not actually be unblocked yet.\n      // We could check it early to avoid scheduling an unnecessary callback.\n\n      Scheduler.unstable_scheduleCallback(Scheduler.unstable_NormalPriority, replayUnblockedEvents);\n    }\n  }\n}\n\nfunction retryIfBlockedOn(unblocked) {\n  // Mark anything that was blocked on this as no longer blocked\n  // and eligible for a replay.\n  if (queuedDiscreteEvents.length > 0) {\n    scheduleCallbackIfUnblocked(queuedDiscreteEvents[0], unblocked); // This is a exponential search for each boundary that commits. I think it's\n    // worth it because we expect very few discrete events to queue up and once\n    // we are actually fully unblocked it will be fast to replay them.\n\n    for (var i = 1; i < queuedDiscreteEvents.length; i++) {\n      var queuedEvent = queuedDiscreteEvents[i];\n\n      if (queuedEvent.blockedOn === unblocked) {\n        queuedEvent.blockedOn = null;\n      }\n    }\n  }\n\n  if (queuedFocus !== null) {\n    scheduleCallbackIfUnblocked(queuedFocus, unblocked);\n  }\n\n  if (queuedDrag !== null) {\n    scheduleCallbackIfUnblocked(queuedDrag, unblocked);\n  }\n\n  if (queuedMouse !== null) {\n    scheduleCallbackIfUnblocked(queuedMouse, unblocked);\n  }\n\n  var unblock = function (queuedEvent) {\n    return scheduleCallbackIfUnblocked(queuedEvent, unblocked);\n  };\n\n  queuedPointers.forEach(unblock);\n  queuedPointerCaptures.forEach(unblock);\n\n  for (var _i = 0; _i < queuedExplicitHydrationTargets.length; _i++) {\n    var queuedTarget = queuedExplicitHydrationTargets[_i];\n\n    if (queuedTarget.blockedOn === unblocked) {\n      queuedTarget.blockedOn = null;\n    }\n  }\n\n  while (queuedExplicitHydrationTargets.length > 0) {\n    var nextExplicitTarget = queuedExplicitHydrationTargets[0];\n\n    if (nextExplicitTarget.blockedOn !== null) {\n      // We're still blocked.\n      break;\n    } else {\n      attemptExplicitHydrationTarget(nextExplicitTarget);\n\n      if (nextExplicitTarget.blockedOn === null) {\n        // We're unblocked.\n        queuedExplicitHydrationTargets.shift();\n      }\n    }\n  }\n}\n\nvar DiscreteEvent = 0;\nvar UserBlockingEvent = 1;\nvar ContinuousEvent = 2;\n\n/**\n * Generate a mapping of standard vendor prefixes using the defined style property and event name.\n *\n * @param {string} styleProp\n * @param {string} eventName\n * @returns {object}\n */\n\nfunction makePrefixMap(styleProp, eventName) {\n  var prefixes = {};\n  prefixes[styleProp.toLowerCase()] = eventName.toLowerCase();\n  prefixes['Webkit' + styleProp] = 'webkit' + eventName;\n  prefixes['Moz' + styleProp] = 'moz' + eventName;\n  return prefixes;\n}\n/**\n * A list of event names to a configurable list of vendor prefixes.\n */\n\n\nvar vendorPrefixes = {\n  animationend: makePrefixMap('Animation', 'AnimationEnd'),\n  animationiteration: makePrefixMap('Animation', 'AnimationIteration'),\n  animationstart: makePrefixMap('Animation', 'AnimationStart'),\n  transitionend: makePrefixMap('Transition', 'TransitionEnd')\n};\n/**\n * Event names that have already been detected and prefixed (if applicable).\n */\n\nvar prefixedEventNames = {};\n/**\n * Element to check for prefixes on.\n */\n\nvar style = {};\n/**\n * Bootstrap if a DOM exists.\n */\n\nif (canUseDOM) {\n  style = document.createElement('div').style; // On some platforms, in particular some releases of Android 4.x,\n  // the un-prefixed \"animation\" and \"transition\" properties are defined on the\n  // style object but the events that fire will still be prefixed, so we need\n  // to check if the un-prefixed events are usable, and if not remove them from the map.\n\n  if (!('AnimationEvent' in window)) {\n    delete vendorPrefixes.animationend.animation;\n    delete vendorPrefixes.animationiteration.animation;\n    delete vendorPrefixes.animationstart.animation;\n  } // Same as above\n\n\n  if (!('TransitionEvent' in window)) {\n    delete vendorPrefixes.transitionend.transition;\n  }\n}\n/**\n * Attempts to determine the correct vendor prefixed event name.\n *\n * @param {string} eventName\n * @returns {string}\n */\n\n\nfunction getVendorPrefixedEventName(eventName) {\n  if (prefixedEventNames[eventName]) {\n    return prefixedEventNames[eventName];\n  } else if (!vendorPrefixes[eventName]) {\n    return eventName;\n  }\n\n  var prefixMap = vendorPrefixes[eventName];\n\n  for (var styleProp in prefixMap) {\n    if (prefixMap.hasOwnProperty(styleProp) && styleProp in style) {\n      return prefixedEventNames[eventName] = prefixMap[styleProp];\n    }\n  }\n\n  return eventName;\n}\n\nvar ANIMATION_END = getVendorPrefixedEventName('animationend');\nvar ANIMATION_ITERATION = getVendorPrefixedEventName('animationiteration');\nvar ANIMATION_START = getVendorPrefixedEventName('animationstart');\nvar TRANSITION_END = getVendorPrefixedEventName('transitionend');\n\nvar topLevelEventsToReactNames = new Map();\nvar eventPriorities = new Map(); // We store most of the events in this module in pairs of two strings so we can re-use\n// the code required to apply the same logic for event prioritization and that of the\n// SimpleEventPlugin. This complicates things slightly, but the aim is to reduce code\n// duplication (for which there would be quite a bit). For the events that are not needed\n// for the SimpleEventPlugin (otherDiscreteEvents) we process them separately as an\n// array of top level events.\n// Lastly, we ignore prettier so we can keep the formatting sane.\n// prettier-ignore\n\nvar discreteEventPairsForSimpleEventPlugin = ['cancel', 'cancel', 'click', 'click', 'close', 'close', 'contextmenu', 'contextMenu', 'copy', 'copy', 'cut', 'cut', 'auxclick', 'auxClick', 'dblclick', 'doubleClick', // Careful!\n'dragend', 'dragEnd', 'dragstart', 'dragStart', 'drop', 'drop', 'focusin', 'focus', // Careful!\n'focusout', 'blur', // Careful!\n'input', 'input', 'invalid', 'invalid', 'keydown', 'keyDown', 'keypress', 'keyPress', 'keyup', 'keyUp', 'mousedown', 'mouseDown', 'mouseup', 'mouseUp', 'paste', 'paste', 'pause', 'pause', 'play', 'play', 'pointercancel', 'pointerCancel', 'pointerdown', 'pointerDown', 'pointerup', 'pointerUp', 'ratechange', 'rateChange', 'reset', 'reset', 'seeked', 'seeked', 'submit', 'submit', 'touchcancel', 'touchCancel', 'touchend', 'touchEnd', 'touchstart', 'touchStart', 'volumechange', 'volumeChange'];\nvar otherDiscreteEvents = ['change', 'selectionchange', 'textInput', 'compositionstart', 'compositionend', 'compositionupdate'];\n\n\nvar userBlockingPairsForSimpleEventPlugin = ['drag', 'drag', 'dragenter', 'dragEnter', 'dragexit', 'dragExit', 'dragleave', 'dragLeave', 'dragover', 'dragOver', 'mousemove', 'mouseMove', 'mouseout', 'mouseOut', 'mouseover', 'mouseOver', 'pointermove', 'pointerMove', 'pointerout', 'pointerOut', 'pointerover', 'pointerOver', 'scroll', 'scroll', 'toggle', 'toggle', 'touchmove', 'touchMove', 'wheel', 'wheel']; // prettier-ignore\n\nvar continuousPairsForSimpleEventPlugin = ['abort', 'abort', ANIMATION_END, 'animationEnd', ANIMATION_ITERATION, 'animationIteration', ANIMATION_START, 'animationStart', 'canplay', 'canPlay', 'canplaythrough', 'canPlayThrough', 'durationchange', 'durationChange', 'emptied', 'emptied', 'encrypted', 'encrypted', 'ended', 'ended', 'error', 'error', 'gotpointercapture', 'gotPointerCapture', 'load', 'load', 'loadeddata', 'loadedData', 'loadedmetadata', 'loadedMetadata', 'loadstart', 'loadStart', 'lostpointercapture', 'lostPointerCapture', 'playing', 'playing', 'progress', 'progress', 'seeking', 'seeking', 'stalled', 'stalled', 'suspend', 'suspend', 'timeupdate', 'timeUpdate', TRANSITION_END, 'transitionEnd', 'waiting', 'waiting'];\n/**\n * Turns\n * ['abort', ...]\n *\n * into\n *\n * topLevelEventsToReactNames = new Map([\n *   ['abort', 'onAbort'],\n * ]);\n *\n * and registers them.\n */\n\nfunction registerSimplePluginEventsAndSetTheirPriorities(eventTypes, priority) {\n  // As the event types are in pairs of two, we need to iterate\n  // through in twos. The events are in pairs of two to save code\n  // and improve init perf of processing this array, as it will\n  // result in far fewer object allocations and property accesses\n  // if we only use three arrays to process all the categories of\n  // instead of tuples.\n  for (var i = 0; i < eventTypes.length; i += 2) {\n    var topEvent = eventTypes[i];\n    var event = eventTypes[i + 1];\n    var capitalizedEvent = event[0].toUpperCase() + event.slice(1);\n    var reactName = 'on' + capitalizedEvent;\n    eventPriorities.set(topEvent, priority);\n    topLevelEventsToReactNames.set(topEvent, reactName);\n    registerTwoPhaseEvent(reactName, [topEvent]);\n  }\n}\n\nfunction setEventPriorities(eventTypes, priority) {\n  for (var i = 0; i < eventTypes.length; i++) {\n    eventPriorities.set(eventTypes[i], priority);\n  }\n}\n\nfunction getEventPriorityForPluginSystem(domEventName) {\n  var priority = eventPriorities.get(domEventName); // Default to a ContinuousEvent. Note: we might\n  // want to warn if we can't detect the priority\n  // for the event.\n\n  return priority === undefined ? ContinuousEvent : priority;\n}\nfunction registerSimpleEvents() {\n  registerSimplePluginEventsAndSetTheirPriorities(discreteEventPairsForSimpleEventPlugin, DiscreteEvent);\n  registerSimplePluginEventsAndSetTheirPriorities(userBlockingPairsForSimpleEventPlugin, UserBlockingEvent);\n  registerSimplePluginEventsAndSetTheirPriorities(continuousPairsForSimpleEventPlugin, ContinuousEvent);\n  setEventPriorities(otherDiscreteEvents, DiscreteEvent);\n}\n\nvar Scheduler_now = Scheduler.unstable_now;\n\n{\n  // Provide explicit error message when production+profiling bundle of e.g.\n  // react-dom is used with production (non-profiling) bundle of\n  // scheduler/tracing\n  if (!(tracing.__interactionsRef != null && tracing.__interactionsRef.current != null)) {\n    {\n      throw Error( \"It is not supported to run the profiling version of a renderer (for example, `react-dom/profiling`) without also replacing the `scheduler/tracing` module with `scheduler/tracing-profiling`. Your bundler might have a setting for aliasing both modules. Learn more at https://reactjs.org/link/profiling\" );\n    }\n  }\n}\n// ascending numbers so we can compare them like numbers. They start at 90 to\n// avoid clashing with Scheduler's priorities.\n\nvar ImmediatePriority = 99;\nvar UserBlockingPriority = 98;\nvar NormalPriority = 97;\nvar LowPriority = 96;\nvar IdlePriority = 95; // NoPriority is the absence of priority. Also React-only.\n\nvar NoPriority = 90;\nvar initialTimeMs = Scheduler_now(); // If the initial timestamp is reasonably small, use Scheduler's `now` directly.\n\nvar SyncLanePriority = 15;\nvar SyncBatchedLanePriority = 14;\nvar InputDiscreteHydrationLanePriority = 13;\nvar InputDiscreteLanePriority = 12;\nvar InputContinuousHydrationLanePriority = 11;\nvar InputContinuousLanePriority = 10;\nvar DefaultHydrationLanePriority = 9;\nvar DefaultLanePriority = 8;\nvar TransitionHydrationPriority = 7;\nvar TransitionPriority = 6;\nvar RetryLanePriority = 5;\nvar SelectiveHydrationLanePriority = 4;\nvar IdleHydrationLanePriority = 3;\nvar IdleLanePriority = 2;\nvar OffscreenLanePriority = 1;\nvar NoLanePriority = 0;\nvar TotalLanes = 31;\nvar NoLanes =\n/*                        */\n0;\nvar NoLane =\n/*                          */\n0;\nvar SyncLane =\n/*                        */\n1;\nvar SyncBatchedLane =\n/*                 */\n2;\nvar InputDiscreteHydrationLane =\n/*      */\n4;\nvar InputDiscreteLanes =\n/*                    */\n24;\nvar InputContinuousHydrationLane =\n/*           */\n32;\nvar InputContinuousLanes =\n/*                  */\n192;\nvar DefaultHydrationLane =\n/*            */\n256;\nvar DefaultLanes =\n/*                   */\n3584;\nvar TransitionHydrationLane =\n/*                */\n4096;\nvar TransitionLanes =\n/*                       */\n4186112;\nvar RetryLanes =\n/*                            */\n62914560;\nvar SomeRetryLane =\n/*                  */\n33554432;\nvar SelectiveHydrationLane =\n/*          */\n67108864;\nvar NonIdleLanes =\n/*                                 */\n134217727;\nvar IdleHydrationLane =\n/*               */\n134217728;\nvar IdleLanes =\n/*                             */\n805306368;\nvar OffscreenLane =\n/*                   */\n1073741824;\nvar NoTimestamp = -1;\nfunction setCurrentUpdateLanePriority(newLanePriority) {\n} // \"Registers\" used to \"return\" multiple values\n// Used by getHighestPriorityLanes and getNextLanes:\n\nvar return_highestLanePriority = DefaultLanePriority;\n\nfunction getHighestPriorityLanes(lanes) {\n  if ((SyncLane & lanes) !== NoLanes) {\n    return_highestLanePriority = SyncLanePriority;\n    return SyncLane;\n  }\n\n  if ((SyncBatchedLane & lanes) !== NoLanes) {\n    return_highestLanePriority = SyncBatchedLanePriority;\n    return SyncBatchedLane;\n  }\n\n  if ((InputDiscreteHydrationLane & lanes) !== NoLanes) {\n    return_highestLanePriority = InputDiscreteHydrationLanePriority;\n    return InputDiscreteHydrationLane;\n  }\n\n  var inputDiscreteLanes = InputDiscreteLanes & lanes;\n\n  if (inputDiscreteLanes !== NoLanes) {\n    return_highestLanePriority = InputDiscreteLanePriority;\n    return inputDiscreteLanes;\n  }\n\n  if ((lanes & InputContinuousHydrationLane) !== NoLanes) {\n    return_highestLanePriority = InputContinuousHydrationLanePriority;\n    return InputContinuousHydrationLane;\n  }\n\n  var inputContinuousLanes = InputContinuousLanes & lanes;\n\n  if (inputContinuousLanes !== NoLanes) {\n    return_highestLanePriority = InputContinuousLanePriority;\n    return inputContinuousLanes;\n  }\n\n  if ((lanes & DefaultHydrationLane) !== NoLanes) {\n    return_highestLanePriority = DefaultHydrationLanePriority;\n    return DefaultHydrationLane;\n  }\n\n  var defaultLanes = DefaultLanes & lanes;\n\n  if (defaultLanes !== NoLanes) {\n    return_highestLanePriority = DefaultLanePriority;\n    return defaultLanes;\n  }\n\n  if ((lanes & TransitionHydrationLane) !== NoLanes) {\n    return_highestLanePriority = TransitionHydrationPriority;\n    return TransitionHydrationLane;\n  }\n\n  var transitionLanes = TransitionLanes & lanes;\n\n  if (transitionLanes !== NoLanes) {\n    return_highestLanePriority = TransitionPriority;\n    return transitionLanes;\n  }\n\n  var retryLanes = RetryLanes & lanes;\n\n  if (retryLanes !== NoLanes) {\n    return_highestLanePriority = RetryLanePriority;\n    return retryLanes;\n  }\n\n  if (lanes & SelectiveHydrationLane) {\n    return_highestLanePriority = SelectiveHydrationLanePriority;\n    return SelectiveHydrationLane;\n  }\n\n  if ((lanes & IdleHydrationLane) !== NoLanes) {\n    return_highestLanePriority = IdleHydrationLanePriority;\n    return IdleHydrationLane;\n  }\n\n  var idleLanes = IdleLanes & lanes;\n\n  if (idleLanes !== NoLanes) {\n    return_highestLanePriority = IdleLanePriority;\n    return idleLanes;\n  }\n\n  if ((OffscreenLane & lanes) !== NoLanes) {\n    return_highestLanePriority = OffscreenLanePriority;\n    return OffscreenLane;\n  }\n\n  {\n    error('Should have found matching lanes. This is a bug in React.');\n  } // This shouldn't be reachable, but as a fallback, return the entire bitmask.\n\n\n  return_highestLanePriority = DefaultLanePriority;\n  return lanes;\n}\n\nfunction schedulerPriorityToLanePriority(schedulerPriorityLevel) {\n  switch (schedulerPriorityLevel) {\n    case ImmediatePriority:\n      return SyncLanePriority;\n\n    case UserBlockingPriority:\n      return InputContinuousLanePriority;\n\n    case NormalPriority:\n    case LowPriority:\n      // TODO: Handle LowSchedulerPriority, somehow. Maybe the same lane as hydration.\n      return DefaultLanePriority;\n\n    case IdlePriority:\n      return IdleLanePriority;\n\n    default:\n      return NoLanePriority;\n  }\n}\nfunction lanePriorityToSchedulerPriority(lanePriority) {\n  switch (lanePriority) {\n    case SyncLanePriority:\n    case SyncBatchedLanePriority:\n      return ImmediatePriority;\n\n    case InputDiscreteHydrationLanePriority:\n    case InputDiscreteLanePriority:\n    case InputContinuousHydrationLanePriority:\n    case InputContinuousLanePriority:\n      return UserBlockingPriority;\n\n    case DefaultHydrationLanePriority:\n    case DefaultLanePriority:\n    case TransitionHydrationPriority:\n    case TransitionPriority:\n    case SelectiveHydrationLanePriority:\n    case RetryLanePriority:\n      return NormalPriority;\n\n    case IdleHydrationLanePriority:\n    case IdleLanePriority:\n    case OffscreenLanePriority:\n      return IdlePriority;\n\n    case NoLanePriority:\n      return NoPriority;\n\n    default:\n      {\n        {\n          throw Error( \"Invalid update priority: \" + lanePriority + \". This is a bug in React.\" );\n        }\n      }\n\n  }\n}\nfunction getNextLanes(root, wipLanes) {\n  // Early bailout if there's no pending work left.\n  var pendingLanes = root.pendingLanes;\n\n  if (pendingLanes === NoLanes) {\n    return_highestLanePriority = NoLanePriority;\n    return NoLanes;\n  }\n\n  var nextLanes = NoLanes;\n  var nextLanePriority = NoLanePriority;\n  var expiredLanes = root.expiredLanes;\n  var suspendedLanes = root.suspendedLanes;\n  var pingedLanes = root.pingedLanes; // Check if any work has expired.\n\n  if (expiredLanes !== NoLanes) {\n    nextLanes = expiredLanes;\n    nextLanePriority = return_highestLanePriority = SyncLanePriority;\n  } else {\n    // Do not work on any idle work until all the non-idle work has finished,\n    // even if the work is suspended.\n    var nonIdlePendingLanes = pendingLanes & NonIdleLanes;\n\n    if (nonIdlePendingLanes !== NoLanes) {\n      var nonIdleUnblockedLanes = nonIdlePendingLanes & ~suspendedLanes;\n\n      if (nonIdleUnblockedLanes !== NoLanes) {\n        nextLanes = getHighestPriorityLanes(nonIdleUnblockedLanes);\n        nextLanePriority = return_highestLanePriority;\n      } else {\n        var nonIdlePingedLanes = nonIdlePendingLanes & pingedLanes;\n\n        if (nonIdlePingedLanes !== NoLanes) {\n          nextLanes = getHighestPriorityLanes(nonIdlePingedLanes);\n          nextLanePriority = return_highestLanePriority;\n        }\n      }\n    } else {\n      // The only remaining work is Idle.\n      var unblockedLanes = pendingLanes & ~suspendedLanes;\n\n      if (unblockedLanes !== NoLanes) {\n        nextLanes = getHighestPriorityLanes(unblockedLanes);\n        nextLanePriority = return_highestLanePriority;\n      } else {\n        if (pingedLanes !== NoLanes) {\n          nextLanes = getHighestPriorityLanes(pingedLanes);\n          nextLanePriority = return_highestLanePriority;\n        }\n      }\n    }\n  }\n\n  if (nextLanes === NoLanes) {\n    // This should only be reachable if we're suspended\n    // TODO: Consider warning in this path if a fallback timer is not scheduled.\n    return NoLanes;\n  } // If there are higher priority lanes, we'll include them even if they\n  // are suspended.\n\n\n  nextLanes = pendingLanes & getEqualOrHigherPriorityLanes(nextLanes); // If we're already in the middle of a render, switching lanes will interrupt\n  // it and we'll lose our progress. We should only do this if the new lanes are\n  // higher priority.\n\n  if (wipLanes !== NoLanes && wipLanes !== nextLanes && // If we already suspended with a delay, then interrupting is fine. Don't\n  // bother waiting until the root is complete.\n  (wipLanes & suspendedLanes) === NoLanes) {\n    getHighestPriorityLanes(wipLanes);\n    var wipLanePriority = return_highestLanePriority;\n\n    if (nextLanePriority <= wipLanePriority) {\n      return wipLanes;\n    } else {\n      return_highestLanePriority = nextLanePriority;\n    }\n  } // Check for entangled lanes and add them to the batch.\n  //\n  // A lane is said to be entangled with another when it's not allowed to render\n  // in a batch that does not also include the other lane. Typically we do this\n  // when multiple updates have the same source, and we only want to respond to\n  // the most recent event from that source.\n  //\n  // Note that we apply entanglements *after* checking for partial work above.\n  // This means that if a lane is entangled during an interleaved event while\n  // it's already rendering, we won't interrupt it. This is intentional, since\n  // entanglement is usually \"best effort\": we'll try our best to render the\n  // lanes in the same batch, but it's not worth throwing out partially\n  // completed work in order to do it.\n  //\n  // For those exceptions where entanglement is semantically important, like\n  // useMutableSource, we should ensure that there is no partial work at the\n  // time we apply the entanglement.\n\n\n  var entangledLanes = root.entangledLanes;\n\n  if (entangledLanes !== NoLanes) {\n    var entanglements = root.entanglements;\n    var lanes = nextLanes & entangledLanes;\n\n    while (lanes > 0) {\n      var index = pickArbitraryLaneIndex(lanes);\n      var lane = 1 << index;\n      nextLanes |= entanglements[index];\n      lanes &= ~lane;\n    }\n  }\n\n  return nextLanes;\n}\nfunction getMostRecentEventTime(root, lanes) {\n  var eventTimes = root.eventTimes;\n  var mostRecentEventTime = NoTimestamp;\n\n  while (lanes > 0) {\n    var index = pickArbitraryLaneIndex(lanes);\n    var lane = 1 << index;\n    var eventTime = eventTimes[index];\n\n    if (eventTime > mostRecentEventTime) {\n      mostRecentEventTime = eventTime;\n    }\n\n    lanes &= ~lane;\n  }\n\n  return mostRecentEventTime;\n}\n\nfunction computeExpirationTime(lane, currentTime) {\n  // TODO: Expiration heuristic is constant per lane, so could use a map.\n  getHighestPriorityLanes(lane);\n  var priority = return_highestLanePriority;\n\n  if (priority >= InputContinuousLanePriority) {\n    // User interactions should expire slightly more quickly.\n    //\n    // NOTE: This is set to the corresponding constant as in Scheduler.js. When\n    // we made it larger, a product metric in www regressed, suggesting there's\n    // a user interaction that's being starved by a series of synchronous\n    // updates. If that theory is correct, the proper solution is to fix the\n    // starvation. However, this scenario supports the idea that expiration\n    // times are an important safeguard when starvation does happen.\n    //\n    // Also note that, in the case of user input specifically, this will soon no\n    // longer be an issue because we plan to make user input synchronous by\n    // default (until you enter `startTransition`, of course.)\n    //\n    // If weren't planning to make these updates synchronous soon anyway, I\n    // would probably make this number a configurable parameter.\n    return currentTime + 250;\n  } else if (priority >= TransitionPriority) {\n    return currentTime + 5000;\n  } else {\n    // Anything idle priority or lower should never expire.\n    return NoTimestamp;\n  }\n}\n\nfunction markStarvedLanesAsExpired(root, currentTime) {\n  // TODO: This gets called every time we yield. We can optimize by storing\n  // the earliest expiration time on the root. Then use that to quickly bail out\n  // of this function.\n  var pendingLanes = root.pendingLanes;\n  var suspendedLanes = root.suspendedLanes;\n  var pingedLanes = root.pingedLanes;\n  var expirationTimes = root.expirationTimes; // Iterate through the pending lanes and check if we've reached their\n  // expiration time. If so, we'll assume the update is being starved and mark\n  // it as expired to force it to finish.\n\n  var lanes = pendingLanes;\n\n  while (lanes > 0) {\n    var index = pickArbitraryLaneIndex(lanes);\n    var lane = 1 << index;\n    var expirationTime = expirationTimes[index];\n\n    if (expirationTime === NoTimestamp) {\n      // Found a pending lane with no expiration time. If it's not suspended, or\n      // if it's pinged, assume it's CPU-bound. Compute a new expiration time\n      // using the current time.\n      if ((lane & suspendedLanes) === NoLanes || (lane & pingedLanes) !== NoLanes) {\n        // Assumes timestamps are monotonically increasing.\n        expirationTimes[index] = computeExpirationTime(lane, currentTime);\n      }\n    } else if (expirationTime <= currentTime) {\n      // This lane expired\n      root.expiredLanes |= lane;\n    }\n\n    lanes &= ~lane;\n  }\n} // This returns the highest priority pending lanes regardless of whether they\nfunction getLanesToRetrySynchronouslyOnError(root) {\n  var everythingButOffscreen = root.pendingLanes & ~OffscreenLane;\n\n  if (everythingButOffscreen !== NoLanes) {\n    return everythingButOffscreen;\n  }\n\n  if (everythingButOffscreen & OffscreenLane) {\n    return OffscreenLane;\n  }\n\n  return NoLanes;\n}\nfunction returnNextLanesPriority() {\n  return return_highestLanePriority;\n}\nfunction includesNonIdleWork(lanes) {\n  return (lanes & NonIdleLanes) !== NoLanes;\n}\nfunction includesOnlyRetries(lanes) {\n  return (lanes & RetryLanes) === lanes;\n}\nfunction includesOnlyTransitions(lanes) {\n  return (lanes & TransitionLanes) === lanes;\n} // To ensure consistency across multiple updates in the same event, this should\n// be a pure function, so that it always returns the same lane for given inputs.\n\nfunction findUpdateLane(lanePriority, wipLanes) {\n  switch (lanePriority) {\n    case NoLanePriority:\n      break;\n\n    case SyncLanePriority:\n      return SyncLane;\n\n    case SyncBatchedLanePriority:\n      return SyncBatchedLane;\n\n    case InputDiscreteLanePriority:\n      {\n        var _lane = pickArbitraryLane(InputDiscreteLanes & ~wipLanes);\n\n        if (_lane === NoLane) {\n          // Shift to the next priority level\n          return findUpdateLane(InputContinuousLanePriority, wipLanes);\n        }\n\n        return _lane;\n      }\n\n    case InputContinuousLanePriority:\n      {\n        var _lane2 = pickArbitraryLane(InputContinuousLanes & ~wipLanes);\n\n        if (_lane2 === NoLane) {\n          // Shift to the next priority level\n          return findUpdateLane(DefaultLanePriority, wipLanes);\n        }\n\n        return _lane2;\n      }\n\n    case DefaultLanePriority:\n      {\n        var _lane3 = pickArbitraryLane(DefaultLanes & ~wipLanes);\n\n        if (_lane3 === NoLane) {\n          // If all the default lanes are already being worked on, look for a\n          // lane in the transition range.\n          _lane3 = pickArbitraryLane(TransitionLanes & ~wipLanes);\n\n          if (_lane3 === NoLane) {\n            // All the transition lanes are taken, too. This should be very\n            // rare, but as a last resort, pick a default lane. This will have\n            // the effect of interrupting the current work-in-progress render.\n            _lane3 = pickArbitraryLane(DefaultLanes);\n          }\n        }\n\n        return _lane3;\n      }\n\n    case TransitionPriority: // Should be handled by findTransitionLane instead\n\n    case RetryLanePriority:\n      // Should be handled by findRetryLane instead\n      break;\n\n    case IdleLanePriority:\n      var lane = pickArbitraryLane(IdleLanes & ~wipLanes);\n\n      if (lane === NoLane) {\n        lane = pickArbitraryLane(IdleLanes);\n      }\n\n      return lane;\n  }\n\n  {\n    {\n      throw Error( \"Invalid update priority: \" + lanePriority + \". This is a bug in React.\" );\n    }\n  }\n} // To ensure consistency across multiple updates in the same event, this should\n// be pure function, so that it always returns the same lane for given inputs.\n\nfunction findTransitionLane(wipLanes, pendingLanes) {\n  // First look for lanes that are completely unclaimed, i.e. have no\n  // pending work.\n  var lane = pickArbitraryLane(TransitionLanes & ~pendingLanes);\n\n  if (lane === NoLane) {\n    // If all lanes have pending work, look for a lane that isn't currently\n    // being worked on.\n    lane = pickArbitraryLane(TransitionLanes & ~wipLanes);\n\n    if (lane === NoLane) {\n      // If everything is being worked on, pick any lane. This has the\n      // effect of interrupting the current work-in-progress.\n      lane = pickArbitraryLane(TransitionLanes);\n    }\n  }\n\n  return lane;\n} // To ensure consistency across multiple updates in the same event, this should\n// be pure function, so that it always returns the same lane for given inputs.\n\nfunction findRetryLane(wipLanes) {\n  // This is a fork of `findUpdateLane` designed specifically for Suspense\n  // \"retries\" — a special update that attempts to flip a Suspense boundary\n  // from its placeholder state to its primary/resolved state.\n  var lane = pickArbitraryLane(RetryLanes & ~wipLanes);\n\n  if (lane === NoLane) {\n    lane = pickArbitraryLane(RetryLanes);\n  }\n\n  return lane;\n}\n\nfunction getHighestPriorityLane(lanes) {\n  return lanes & -lanes;\n}\n\nfunction getLowestPriorityLane(lanes) {\n  // This finds the most significant non-zero bit.\n  var index = 31 - clz32(lanes);\n  return index < 0 ? NoLanes : 1 << index;\n}\n\nfunction getEqualOrHigherPriorityLanes(lanes) {\n  return (getLowestPriorityLane(lanes) << 1) - 1;\n}\n\nfunction pickArbitraryLane(lanes) {\n  // This wrapper function gets inlined. Only exists so to communicate that it\n  // doesn't matter which bit is selected; you can pick any bit without\n  // affecting the algorithms where its used. Here I'm using\n  // getHighestPriorityLane because it requires the fewest operations.\n  return getHighestPriorityLane(lanes);\n}\n\nfunction pickArbitraryLaneIndex(lanes) {\n  return 31 - clz32(lanes);\n}\n\nfunction laneToIndex(lane) {\n  return pickArbitraryLaneIndex(lane);\n}\n\nfunction includesSomeLane(a, b) {\n  return (a & b) !== NoLanes;\n}\nfunction isSubsetOfLanes(set, subset) {\n  return (set & subset) === subset;\n}\nfunction mergeLanes(a, b) {\n  return a | b;\n}\nfunction removeLanes(set, subset) {\n  return set & ~subset;\n} // Seems redundant, but it changes the type from a single lane (used for\n// updates) to a group of lanes (used for flushing work).\n\nfunction laneToLanes(lane) {\n  return lane;\n}\nfunction higherPriorityLane(a, b) {\n  // This works because the bit ranges decrease in priority as you go left.\n  return a !== NoLane && a < b ? a : b;\n}\nfunction createLaneMap(initial) {\n  // Intentionally pushing one by one.\n  // https://v8.dev/blog/elements-kinds#avoid-creating-holes\n  var laneMap = [];\n\n  for (var i = 0; i < TotalLanes; i++) {\n    laneMap.push(initial);\n  }\n\n  return laneMap;\n}\nfunction markRootUpdated(root, updateLane, eventTime) {\n  root.pendingLanes |= updateLane; // TODO: Theoretically, any update to any lane can unblock any other lane. But\n  // it's not practical to try every single possible combination. We need a\n  // heuristic to decide which lanes to attempt to render, and in which batches.\n  // For now, we use the same heuristic as in the old ExpirationTimes model:\n  // retry any lane at equal or lower priority, but don't try updates at higher\n  // priority without also including the lower priority updates. This works well\n  // when considering updates across different priority levels, but isn't\n  // sufficient for updates within the same priority, since we want to treat\n  // those updates as parallel.\n  // Unsuspend any update at equal or lower priority.\n\n  var higherPriorityLanes = updateLane - 1; // Turns 0b1000 into 0b0111\n\n  root.suspendedLanes &= higherPriorityLanes;\n  root.pingedLanes &= higherPriorityLanes;\n  var eventTimes = root.eventTimes;\n  var index = laneToIndex(updateLane); // We can always overwrite an existing timestamp because we prefer the most\n  // recent event, and we assume time is monotonically increasing.\n\n  eventTimes[index] = eventTime;\n}\nfunction markRootSuspended(root, suspendedLanes) {\n  root.suspendedLanes |= suspendedLanes;\n  root.pingedLanes &= ~suspendedLanes; // The suspended lanes are no longer CPU-bound. Clear their expiration times.\n\n  var expirationTimes = root.expirationTimes;\n  var lanes = suspendedLanes;\n\n  while (lanes > 0) {\n    var index = pickArbitraryLaneIndex(lanes);\n    var lane = 1 << index;\n    expirationTimes[index] = NoTimestamp;\n    lanes &= ~lane;\n  }\n}\nfunction markRootPinged(root, pingedLanes, eventTime) {\n  root.pingedLanes |= root.suspendedLanes & pingedLanes;\n}\nfunction markDiscreteUpdatesExpired(root) {\n  root.expiredLanes |= InputDiscreteLanes & root.pendingLanes;\n}\nfunction hasDiscreteLanes(lanes) {\n  return (lanes & InputDiscreteLanes) !== NoLanes;\n}\nfunction markRootMutableRead(root, updateLane) {\n  root.mutableReadLanes |= updateLane & root.pendingLanes;\n}\nfunction markRootFinished(root, remainingLanes) {\n  var noLongerPendingLanes = root.pendingLanes & ~remainingLanes;\n  root.pendingLanes = remainingLanes; // Let's try everything again\n\n  root.suspendedLanes = 0;\n  root.pingedLanes = 0;\n  root.expiredLanes &= remainingLanes;\n  root.mutableReadLanes &= remainingLanes;\n  root.entangledLanes &= remainingLanes;\n  var entanglements = root.entanglements;\n  var eventTimes = root.eventTimes;\n  var expirationTimes = root.expirationTimes; // Clear the lanes that no longer have pending work\n\n  var lanes = noLongerPendingLanes;\n\n  while (lanes > 0) {\n    var index = pickArbitraryLaneIndex(lanes);\n    var lane = 1 << index;\n    entanglements[index] = NoLanes;\n    eventTimes[index] = NoTimestamp;\n    expirationTimes[index] = NoTimestamp;\n    lanes &= ~lane;\n  }\n}\nfunction markRootEntangled(root, entangledLanes) {\n  root.entangledLanes |= entangledLanes;\n  var entanglements = root.entanglements;\n  var lanes = entangledLanes;\n\n  while (lanes > 0) {\n    var index = pickArbitraryLaneIndex(lanes);\n    var lane = 1 << index;\n    entanglements[index] |= entangledLanes;\n    lanes &= ~lane;\n  }\n}\nvar clz32 = Math.clz32 ? Math.clz32 : clz32Fallback; // Count leading zeros. Only used on lanes, so assume input is an integer.\n// Based on:\n// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math/clz32\n\nvar log = Math.log;\nvar LN2 = Math.LN2;\n\nfunction clz32Fallback(lanes) {\n  if (lanes === 0) {\n    return 32;\n  }\n\n  return 31 - (log(lanes) / LN2 | 0) | 0;\n}\n\n// Intentionally not named imports because Rollup would use dynamic dispatch for\nvar UserBlockingPriority$1 = Scheduler.unstable_UserBlockingPriority,\n    runWithPriority = Scheduler.unstable_runWithPriority; // TODO: can we stop exporting these?\n\nvar _enabled = true; // This is exported in FB builds for use by legacy FB layer infra.\n// We'd like to remove this but it's not clear if this is safe.\n\nfunction setEnabled(enabled) {\n  _enabled = !!enabled;\n}\nfunction isEnabled() {\n  return _enabled;\n}\nfunction createEventListenerWrapperWithPriority(targetContainer, domEventName, eventSystemFlags) {\n  var eventPriority = getEventPriorityForPluginSystem(domEventName);\n  var listenerWrapper;\n\n  switch (eventPriority) {\n    case DiscreteEvent:\n      listenerWrapper = dispatchDiscreteEvent;\n      break;\n\n    case UserBlockingEvent:\n      listenerWrapper = dispatchUserBlockingUpdate;\n      break;\n\n    case ContinuousEvent:\n    default:\n      listenerWrapper = dispatchEvent;\n      break;\n  }\n\n  return listenerWrapper.bind(null, domEventName, eventSystemFlags, targetContainer);\n}\n\nfunction dispatchDiscreteEvent(domEventName, eventSystemFlags, container, nativeEvent) {\n  {\n    flushDiscreteUpdatesIfNeeded(nativeEvent.timeStamp);\n  }\n\n  discreteUpdates(dispatchEvent, domEventName, eventSystemFlags, container, nativeEvent);\n}\n\nfunction dispatchUserBlockingUpdate(domEventName, eventSystemFlags, container, nativeEvent) {\n  {\n    runWithPriority(UserBlockingPriority$1, dispatchEvent.bind(null, domEventName, eventSystemFlags, container, nativeEvent));\n  }\n}\n\nfunction dispatchEvent(domEventName, eventSystemFlags, targetContainer, nativeEvent) {\n  if (!_enabled) {\n    return;\n  }\n\n  var allowReplay = true;\n\n  {\n    // TODO: replaying capture phase events is currently broken\n    // because we used to do it during top-level native bubble handlers\n    // but now we use different bubble and capture handlers.\n    // In eager mode, we attach capture listeners early, so we need\n    // to filter them out until we fix the logic to handle them correctly.\n    // This could've been outside the flag but I put it inside to reduce risk.\n    allowReplay = (eventSystemFlags & IS_CAPTURE_PHASE) === 0;\n  }\n\n  if (allowReplay && hasQueuedDiscreteEvents() && isReplayableDiscreteEvent(domEventName)) {\n    // If we already have a queue of discrete events, and this is another discrete\n    // event, then we can't dispatch it regardless of its target, since they\n    // need to dispatch in order.\n    queueDiscreteEvent(null, // Flags that we're not actually blocked on anything as far as we know.\n    domEventName, eventSystemFlags, targetContainer, nativeEvent);\n    return;\n  }\n\n  var blockedOn = attemptToDispatchEvent(domEventName, eventSystemFlags, targetContainer, nativeEvent);\n\n  if (blockedOn === null) {\n    // We successfully dispatched this event.\n    if (allowReplay) {\n      clearIfContinuousEvent(domEventName, nativeEvent);\n    }\n\n    return;\n  }\n\n  if (allowReplay) {\n    if (isReplayableDiscreteEvent(domEventName)) {\n      // This this to be replayed later once the target is available.\n      queueDiscreteEvent(blockedOn, domEventName, eventSystemFlags, targetContainer, nativeEvent);\n      return;\n    }\n\n    if (queueIfContinuousEvent(blockedOn, domEventName, eventSystemFlags, targetContainer, nativeEvent)) {\n      return;\n    } // We need to clear only if we didn't queue because\n    // queueing is accummulative.\n\n\n    clearIfContinuousEvent(domEventName, nativeEvent);\n  } // This is not replayable so we'll invoke it but without a target,\n  // in case the event system needs to trace it.\n\n\n  dispatchEventForPluginEventSystem(domEventName, eventSystemFlags, nativeEvent, null, targetContainer);\n} // Attempt dispatching an event. Returns a SuspenseInstance or Container if it's blocked.\n\nfunction attemptToDispatchEvent(domEventName, eventSystemFlags, targetContainer, nativeEvent) {\n  // TODO: Warn if _enabled is false.\n  var nativeEventTarget = getEventTarget(nativeEvent);\n  var targetInst = getClosestInstanceFromNode(nativeEventTarget);\n\n  if (targetInst !== null) {\n    var nearestMounted = getNearestMountedFiber(targetInst);\n\n    if (nearestMounted === null) {\n      // This tree has been unmounted already. Dispatch without a target.\n      targetInst = null;\n    } else {\n      var tag = nearestMounted.tag;\n\n      if (tag === SuspenseComponent) {\n        var instance = getSuspenseInstanceFromFiber(nearestMounted);\n\n        if (instance !== null) {\n          // Queue the event to be replayed later. Abort dispatching since we\n          // don't want this event dispatched twice through the event system.\n          // TODO: If this is the first discrete event in the queue. Schedule an increased\n          // priority for this boundary.\n          return instance;\n        } // This shouldn't happen, something went wrong but to avoid blocking\n        // the whole system, dispatch the event without a target.\n        // TODO: Warn.\n\n\n        targetInst = null;\n      } else if (tag === HostRoot) {\n        var root = nearestMounted.stateNode;\n\n        if (root.hydrate) {\n          // If this happens during a replay something went wrong and it might block\n          // the whole system.\n          return getContainerFromFiber(nearestMounted);\n        }\n\n        targetInst = null;\n      } else if (nearestMounted !== targetInst) {\n        // If we get an event (ex: img onload) before committing that\n        // component's mount, ignore it for now (that is, treat it as if it was an\n        // event on a non-React tree). We might also consider queueing events and\n        // dispatching them after the mount.\n        targetInst = null;\n      }\n    }\n  }\n\n  dispatchEventForPluginEventSystem(domEventName, eventSystemFlags, nativeEvent, targetInst, targetContainer); // We're not blocked on anything.\n\n  return null;\n}\n\nfunction addEventBubbleListener(target, eventType, listener) {\n  target.addEventListener(eventType, listener, false);\n  return listener;\n}\nfunction addEventCaptureListener(target, eventType, listener) {\n  target.addEventListener(eventType, listener, true);\n  return listener;\n}\nfunction addEventCaptureListenerWithPassiveFlag(target, eventType, listener, passive) {\n  target.addEventListener(eventType, listener, {\n    capture: true,\n    passive: passive\n  });\n  return listener;\n}\nfunction addEventBubbleListenerWithPassiveFlag(target, eventType, listener, passive) {\n  target.addEventListener(eventType, listener, {\n    passive: passive\n  });\n  return listener;\n}\n\n/**\n * These variables store information about text content of a target node,\n * allowing comparison of content before and after a given event.\n *\n * Identify the node where selection currently begins, then observe\n * both its text content and its current position in the DOM. Since the\n * browser may natively replace the target node during composition, we can\n * use its position to find its replacement.\n *\n *\n */\nvar root = null;\nvar startText = null;\nvar fallbackText = null;\nfunction initialize(nativeEventTarget) {\n  root = nativeEventTarget;\n  startText = getText();\n  return true;\n}\nfunction reset() {\n  root = null;\n  startText = null;\n  fallbackText = null;\n}\nfunction getData() {\n  if (fallbackText) {\n    return fallbackText;\n  }\n\n  var start;\n  var startValue = startText;\n  var startLength = startValue.length;\n  var end;\n  var endValue = getText();\n  var endLength = endValue.length;\n\n  for (start = 0; start < startLength; start++) {\n    if (startValue[start] !== endValue[start]) {\n      break;\n    }\n  }\n\n  var minEnd = startLength - start;\n\n  for (end = 1; end <= minEnd; end++) {\n    if (startValue[startLength - end] !== endValue[endLength - end]) {\n      break;\n    }\n  }\n\n  var sliceTail = end > 1 ? 1 - end : undefined;\n  fallbackText = endValue.slice(start, sliceTail);\n  return fallbackText;\n}\nfunction getText() {\n  if ('value' in root) {\n    return root.value;\n  }\n\n  return root.textContent;\n}\n\n/**\n * `charCode` represents the actual \"character code\" and is safe to use with\n * `String.fromCharCode`. As such, only keys that correspond to printable\n * characters produce a valid `charCode`, the only exception to this is Enter.\n * The Tab-key is considered non-printable and does not have a `charCode`,\n * presumably because it does not produce a tab-character in browsers.\n *\n * @param {object} nativeEvent Native browser event.\n * @return {number} Normalized `charCode` property.\n */\nfunction getEventCharCode(nativeEvent) {\n  var charCode;\n  var keyCode = nativeEvent.keyCode;\n\n  if ('charCode' in nativeEvent) {\n    charCode = nativeEvent.charCode; // FF does not set `charCode` for the Enter-key, check against `keyCode`.\n\n    if (charCode === 0 && keyCode === 13) {\n      charCode = 13;\n    }\n  } else {\n    // IE8 does not implement `charCode`, but `keyCode` has the correct value.\n    charCode = keyCode;\n  } // IE and Edge (on Windows) and Chrome / Safari (on Windows and Linux)\n  // report Enter as charCode 10 when ctrl is pressed.\n\n\n  if (charCode === 10) {\n    charCode = 13;\n  } // Some non-printable keys are reported in `charCode`/`keyCode`, discard them.\n  // Must not discard the (non-)printable Enter-key.\n\n\n  if (charCode >= 32 || charCode === 13) {\n    return charCode;\n  }\n\n  return 0;\n}\n\nfunction functionThatReturnsTrue() {\n  return true;\n}\n\nfunction functionThatReturnsFalse() {\n  return false;\n} // This is intentionally a factory so that we have different returned constructors.\n// If we had a single constructor, it would be megamorphic and engines would deopt.\n\n\nfunction createSyntheticEvent(Interface) {\n  /**\n   * Synthetic events are dispatched by event plugins, typically in response to a\n   * top-level event delegation handler.\n   *\n   * These systems should generally use pooling to reduce the frequency of garbage\n   * collection. The system should check `isPersistent` to determine whether the\n   * event should be released into the pool after being dispatched. Users that\n   * need a persisted event should invoke `persist`.\n   *\n   * Synthetic events (and subclasses) implement the DOM Level 3 Events API by\n   * normalizing browser quirks. Subclasses do not necessarily have to implement a\n   * DOM interface; custom application-specific events can also subclass this.\n   */\n  function SyntheticBaseEvent(reactName, reactEventType, targetInst, nativeEvent, nativeEventTarget) {\n    this._reactName = reactName;\n    this._targetInst = targetInst;\n    this.type = reactEventType;\n    this.nativeEvent = nativeEvent;\n    this.target = nativeEventTarget;\n    this.currentTarget = null;\n\n    for (var _propName in Interface) {\n      if (!Interface.hasOwnProperty(_propName)) {\n        continue;\n      }\n\n      var normalize = Interface[_propName];\n\n      if (normalize) {\n        this[_propName] = normalize(nativeEvent);\n      } else {\n        this[_propName] = nativeEvent[_propName];\n      }\n    }\n\n    var defaultPrevented = nativeEvent.defaultPrevented != null ? nativeEvent.defaultPrevented : nativeEvent.returnValue === false;\n\n    if (defaultPrevented) {\n      this.isDefaultPrevented = functionThatReturnsTrue;\n    } else {\n      this.isDefaultPrevented = functionThatReturnsFalse;\n    }\n\n    this.isPropagationStopped = functionThatReturnsFalse;\n    return this;\n  }\n\n  _assign(SyntheticBaseEvent.prototype, {\n    preventDefault: function () {\n      this.defaultPrevented = true;\n      var event = this.nativeEvent;\n\n      if (!event) {\n        return;\n      }\n\n      if (event.preventDefault) {\n        event.preventDefault(); // $FlowFixMe - flow is not aware of `unknown` in IE\n      } else if (typeof event.returnValue !== 'unknown') {\n        event.returnValue = false;\n      }\n\n      this.isDefaultPrevented = functionThatReturnsTrue;\n    },\n    stopPropagation: function () {\n      var event = this.nativeEvent;\n\n      if (!event) {\n        return;\n      }\n\n      if (event.stopPropagation) {\n        event.stopPropagation(); // $FlowFixMe - flow is not aware of `unknown` in IE\n      } else if (typeof event.cancelBubble !== 'unknown') {\n        // The ChangeEventPlugin registers a \"propertychange\" event for\n        // IE. This event does not support bubbling or cancelling, and\n        // any references to cancelBubble throw \"Member not found\".  A\n        // typeof check of \"unknown\" circumvents this issue (and is also\n        // IE specific).\n        event.cancelBubble = true;\n      }\n\n      this.isPropagationStopped = functionThatReturnsTrue;\n    },\n\n    /**\n     * We release all dispatched `SyntheticEvent`s after each event loop, adding\n     * them back into the pool. This allows a way to hold onto a reference that\n     * won't be added back into the pool.\n     */\n    persist: function () {// Modern event system doesn't use pooling.\n    },\n\n    /**\n     * Checks if this event should be released back into the pool.\n     *\n     * @return {boolean} True if this should not be released, false otherwise.\n     */\n    isPersistent: functionThatReturnsTrue\n  });\n\n  return SyntheticBaseEvent;\n}\n/**\n * @interface Event\n * @see http://www.w3.org/TR/DOM-Level-3-Events/\n */\n\n\nvar EventInterface = {\n  eventPhase: 0,\n  bubbles: 0,\n  cancelable: 0,\n  timeStamp: function (event) {\n    return event.timeStamp || Date.now();\n  },\n  defaultPrevented: 0,\n  isTrusted: 0\n};\nvar SyntheticEvent = createSyntheticEvent(EventInterface);\n\nvar UIEventInterface = _assign({}, EventInterface, {\n  view: 0,\n  detail: 0\n});\n\nvar SyntheticUIEvent = createSyntheticEvent(UIEventInterface);\nvar lastMovementX;\nvar lastMovementY;\nvar lastMouseEvent;\n\nfunction updateMouseMovementPolyfillState(event) {\n  if (event !== lastMouseEvent) {\n    if (lastMouseEvent && event.type === 'mousemove') {\n      lastMovementX = event.screenX - lastMouseEvent.screenX;\n      lastMovementY = event.screenY - lastMouseEvent.screenY;\n    } else {\n      lastMovementX = 0;\n      lastMovementY = 0;\n    }\n\n    lastMouseEvent = event;\n  }\n}\n/**\n * @interface MouseEvent\n * @see http://www.w3.org/TR/DOM-Level-3-Events/\n */\n\n\nvar MouseEventInterface = _assign({}, UIEventInterface, {\n  screenX: 0,\n  screenY: 0,\n  clientX: 0,\n  clientY: 0,\n  pageX: 0,\n  pageY: 0,\n  ctrlKey: 0,\n  shiftKey: 0,\n  altKey: 0,\n  metaKey: 0,\n  getModifierState: getEventModifierState,\n  button: 0,\n  buttons: 0,\n  relatedTarget: function (event) {\n    if (event.relatedTarget === undefined) return event.fromElement === event.srcElement ? event.toElement : event.fromElement;\n    return event.relatedTarget;\n  },\n  movementX: function (event) {\n    if ('movementX' in event) {\n      return event.movementX;\n    }\n\n    updateMouseMovementPolyfillState(event);\n    return lastMovementX;\n  },\n  movementY: function (event) {\n    if ('movementY' in event) {\n      return event.movementY;\n    } // Don't need to call updateMouseMovementPolyfillState() here\n    // because it's guaranteed to have already run when movementX\n    // was copied.\n\n\n    return lastMovementY;\n  }\n});\n\nvar SyntheticMouseEvent = createSyntheticEvent(MouseEventInterface);\n/**\n * @interface DragEvent\n * @see http://www.w3.org/TR/DOM-Level-3-Events/\n */\n\nvar DragEventInterface = _assign({}, MouseEventInterface, {\n  dataTransfer: 0\n});\n\nvar SyntheticDragEvent = createSyntheticEvent(DragEventInterface);\n/**\n * @interface FocusEvent\n * @see http://www.w3.org/TR/DOM-Level-3-Events/\n */\n\nvar FocusEventInterface = _assign({}, UIEventInterface, {\n  relatedTarget: 0\n});\n\nvar SyntheticFocusEvent = createSyntheticEvent(FocusEventInterface);\n/**\n * @interface Event\n * @see http://www.w3.org/TR/css3-animations/#AnimationEvent-interface\n * @see https://developer.mozilla.org/en-US/docs/Web/API/AnimationEvent\n */\n\nvar AnimationEventInterface = _assign({}, EventInterface, {\n  animationName: 0,\n  elapsedTime: 0,\n  pseudoElement: 0\n});\n\nvar SyntheticAnimationEvent = createSyntheticEvent(AnimationEventInterface);\n/**\n * @interface Event\n * @see http://www.w3.org/TR/clipboard-apis/\n */\n\nvar ClipboardEventInterface = _assign({}, EventInterface, {\n  clipboardData: function (event) {\n    return 'clipboardData' in event ? event.clipboardData : window.clipboardData;\n  }\n});\n\nvar SyntheticClipboardEvent = createSyntheticEvent(ClipboardEventInterface);\n/**\n * @interface Event\n * @see http://www.w3.org/TR/DOM-Level-3-Events/#events-compositionevents\n */\n\nvar CompositionEventInterface = _assign({}, EventInterface, {\n  data: 0\n});\n\nvar SyntheticCompositionEvent = createSyntheticEvent(CompositionEventInterface);\n/**\n * @interface Event\n * @see http://www.w3.org/TR/2013/WD-DOM-Level-3-Events-20131105\n *      /#events-inputevents\n */\n// Happens to share the same list for now.\n\nvar SyntheticInputEvent = SyntheticCompositionEvent;\n/**\n * Normalization of deprecated HTML5 `key` values\n * @see https://developer.mozilla.org/en-US/docs/Web/API/KeyboardEvent#Key_names\n */\n\nvar normalizeKey = {\n  Esc: 'Escape',\n  Spacebar: ' ',\n  Left: 'ArrowLeft',\n  Up: 'ArrowUp',\n  Right: 'ArrowRight',\n  Down: 'ArrowDown',\n  Del: 'Delete',\n  Win: 'OS',\n  Menu: 'ContextMenu',\n  Apps: 'ContextMenu',\n  Scroll: 'ScrollLock',\n  MozPrintableKey: 'Unidentified'\n};\n/**\n * Translation from legacy `keyCode` to HTML5 `key`\n * Only special keys supported, all others depend on keyboard layout or browser\n * @see https://developer.mozilla.org/en-US/docs/Web/API/KeyboardEvent#Key_names\n */\n\nvar translateToKey = {\n  '8': 'Backspace',\n  '9': 'Tab',\n  '12': 'Clear',\n  '13': 'Enter',\n  '16': 'Shift',\n  '17': 'Control',\n  '18': 'Alt',\n  '19': 'Pause',\n  '20': 'CapsLock',\n  '27': 'Escape',\n  '32': ' ',\n  '33': 'PageUp',\n  '34': 'PageDown',\n  '35': 'End',\n  '36': 'Home',\n  '37': 'ArrowLeft',\n  '38': 'ArrowUp',\n  '39': 'ArrowRight',\n  '40': 'ArrowDown',\n  '45': 'Insert',\n  '46': 'Delete',\n  '112': 'F1',\n  '113': 'F2',\n  '114': 'F3',\n  '115': 'F4',\n  '116': 'F5',\n  '117': 'F6',\n  '118': 'F7',\n  '119': 'F8',\n  '120': 'F9',\n  '121': 'F10',\n  '122': 'F11',\n  '123': 'F12',\n  '144': 'NumLock',\n  '145': 'ScrollLock',\n  '224': 'Meta'\n};\n/**\n * @param {object} nativeEvent Native browser event.\n * @return {string} Normalized `key` property.\n */\n\nfunction getEventKey(nativeEvent) {\n  if (nativeEvent.key) {\n    // Normalize inconsistent values reported by browsers due to\n    // implementations of a working draft specification.\n    // FireFox implements `key` but returns `MozPrintableKey` for all\n    // printable characters (normalized to `Unidentified`), ignore it.\n    var key = normalizeKey[nativeEvent.key] || nativeEvent.key;\n\n    if (key !== 'Unidentified') {\n      return key;\n    }\n  } // Browser does not implement `key`, polyfill as much of it as we can.\n\n\n  if (nativeEvent.type === 'keypress') {\n    var charCode = getEventCharCode(nativeEvent); // The enter-key is technically both printable and non-printable and can\n    // thus be captured by `keypress`, no other non-printable key should.\n\n    return charCode === 13 ? 'Enter' : String.fromCharCode(charCode);\n  }\n\n  if (nativeEvent.type === 'keydown' || nativeEvent.type === 'keyup') {\n    // While user keyboard layout determines the actual meaning of each\n    // `keyCode` value, almost all function keys have a universal value.\n    return translateToKey[nativeEvent.keyCode] || 'Unidentified';\n  }\n\n  return '';\n}\n/**\n * Translation from modifier key to the associated property in the event.\n * @see http://www.w3.org/TR/DOM-Level-3-Events/#keys-Modifiers\n */\n\n\nvar modifierKeyToProp = {\n  Alt: 'altKey',\n  Control: 'ctrlKey',\n  Meta: 'metaKey',\n  Shift: 'shiftKey'\n}; // Older browsers (Safari <= 10, iOS Safari <= 10.2) do not support\n// getModifierState. If getModifierState is not supported, we map it to a set of\n// modifier keys exposed by the event. In this case, Lock-keys are not supported.\n\nfunction modifierStateGetter(keyArg) {\n  var syntheticEvent = this;\n  var nativeEvent = syntheticEvent.nativeEvent;\n\n  if (nativeEvent.getModifierState) {\n    return nativeEvent.getModifierState(keyArg);\n  }\n\n  var keyProp = modifierKeyToProp[keyArg];\n  return keyProp ? !!nativeEvent[keyProp] : false;\n}\n\nfunction getEventModifierState(nativeEvent) {\n  return modifierStateGetter;\n}\n/**\n * @interface KeyboardEvent\n * @see http://www.w3.org/TR/DOM-Level-3-Events/\n */\n\n\nvar KeyboardEventInterface = _assign({}, UIEventInterface, {\n  key: getEventKey,\n  code: 0,\n  location: 0,\n  ctrlKey: 0,\n  shiftKey: 0,\n  altKey: 0,\n  metaKey: 0,\n  repeat: 0,\n  locale: 0,\n  getModifierState: getEventModifierState,\n  // Legacy Interface\n  charCode: function (event) {\n    // `charCode` is the result of a KeyPress event and represents the value of\n    // the actual printable character.\n    // KeyPress is deprecated, but its replacement is not yet final and not\n    // implemented in any major browser. Only KeyPress has charCode.\n    if (event.type === 'keypress') {\n      return getEventCharCode(event);\n    }\n\n    return 0;\n  },\n  keyCode: function (event) {\n    // `keyCode` is the result of a KeyDown/Up event and represents the value of\n    // physical keyboard key.\n    // The actual meaning of the value depends on the users' keyboard layout\n    // which cannot be detected. Assuming that it is a US keyboard layout\n    // provides a surprisingly accurate mapping for US and European users.\n    // Due to this, it is left to the user to implement at this time.\n    if (event.type === 'keydown' || event.type === 'keyup') {\n      return event.keyCode;\n    }\n\n    return 0;\n  },\n  which: function (event) {\n    // `which` is an alias for either `keyCode` or `charCode` depending on the\n    // type of the event.\n    if (event.type === 'keypress') {\n      return getEventCharCode(event);\n    }\n\n    if (event.type === 'keydown' || event.type === 'keyup') {\n      return event.keyCode;\n    }\n\n    return 0;\n  }\n});\n\nvar SyntheticKeyboardEvent = createSyntheticEvent(KeyboardEventInterface);\n/**\n * @interface PointerEvent\n * @see http://www.w3.org/TR/pointerevents/\n */\n\nvar PointerEventInterface = _assign({}, MouseEventInterface, {\n  pointerId: 0,\n  width: 0,\n  height: 0,\n  pressure: 0,\n  tangentialPressure: 0,\n  tiltX: 0,\n  tiltY: 0,\n  twist: 0,\n  pointerType: 0,\n  isPrimary: 0\n});\n\nvar SyntheticPointerEvent = createSyntheticEvent(PointerEventInterface);\n/**\n * @interface TouchEvent\n * @see http://www.w3.org/TR/touch-events/\n */\n\nvar TouchEventInterface = _assign({}, UIEventInterface, {\n  touches: 0,\n  targetTouches: 0,\n  changedTouches: 0,\n  altKey: 0,\n  metaKey: 0,\n  ctrlKey: 0,\n  shiftKey: 0,\n  getModifierState: getEventModifierState\n});\n\nvar SyntheticTouchEvent = createSyntheticEvent(TouchEventInterface);\n/**\n * @interface Event\n * @see http://www.w3.org/TR/2009/WD-css3-transitions-20090320/#transition-events-\n * @see https://developer.mozilla.org/en-US/docs/Web/API/TransitionEvent\n */\n\nvar TransitionEventInterface = _assign({}, EventInterface, {\n  propertyName: 0,\n  elapsedTime: 0,\n  pseudoElement: 0\n});\n\nvar SyntheticTransitionEvent = createSyntheticEvent(TransitionEventInterface);\n/**\n * @interface WheelEvent\n * @see http://www.w3.org/TR/DOM-Level-3-Events/\n */\n\nvar WheelEventInterface = _assign({}, MouseEventInterface, {\n  deltaX: function (event) {\n    return 'deltaX' in event ? event.deltaX : // Fallback to `wheelDeltaX` for Webkit and normalize (right is positive).\n    'wheelDeltaX' in event ? -event.wheelDeltaX : 0;\n  },\n  deltaY: function (event) {\n    return 'deltaY' in event ? event.deltaY : // Fallback to `wheelDeltaY` for Webkit and normalize (down is positive).\n    'wheelDeltaY' in event ? -event.wheelDeltaY : // Fallback to `wheelDelta` for IE<9 and normalize (down is positive).\n    'wheelDelta' in event ? -event.wheelDelta : 0;\n  },\n  deltaZ: 0,\n  // Browsers without \"deltaMode\" is reporting in raw wheel delta where one\n  // notch on the scroll is always +/- 120, roughly equivalent to pixels.\n  // A good approximation of DOM_DELTA_LINE (1) is 5% of viewport size or\n  // ~40 pixels, for DOM_DELTA_SCREEN (2) it is 87.5% of viewport size.\n  deltaMode: 0\n});\n\nvar SyntheticWheelEvent = createSyntheticEvent(WheelEventInterface);\n\nvar END_KEYCODES = [9, 13, 27, 32]; // Tab, Return, Esc, Space\n\nvar START_KEYCODE = 229;\nvar canUseCompositionEvent = canUseDOM && 'CompositionEvent' in window;\nvar documentMode = null;\n\nif (canUseDOM && 'documentMode' in document) {\n  documentMode = document.documentMode;\n} // Webkit offers a very useful `textInput` event that can be used to\n// directly represent `beforeInput`. The IE `textinput` event is not as\n// useful, so we don't use it.\n\n\nvar canUseTextInputEvent = canUseDOM && 'TextEvent' in window && !documentMode; // In IE9+, we have access to composition events, but the data supplied\n// by the native compositionend event may be incorrect. Japanese ideographic\n// spaces, for instance (\\u3000) are not recorded correctly.\n\nvar useFallbackCompositionData = canUseDOM && (!canUseCompositionEvent || documentMode && documentMode > 8 && documentMode <= 11);\nvar SPACEBAR_CODE = 32;\nvar SPACEBAR_CHAR = String.fromCharCode(SPACEBAR_CODE);\n\nfunction registerEvents() {\n  registerTwoPhaseEvent('onBeforeInput', ['compositionend', 'keypress', 'textInput', 'paste']);\n  registerTwoPhaseEvent('onCompositionEnd', ['compositionend', 'focusout', 'keydown', 'keypress', 'keyup', 'mousedown']);\n  registerTwoPhaseEvent('onCompositionStart', ['compositionstart', 'focusout', 'keydown', 'keypress', 'keyup', 'mousedown']);\n  registerTwoPhaseEvent('onCompositionUpdate', ['compositionupdate', 'focusout', 'keydown', 'keypress', 'keyup', 'mousedown']);\n} // Track whether we've ever handled a keypress on the space key.\n\n\nvar hasSpaceKeypress = false;\n/**\n * Return whether a native keypress event is assumed to be a command.\n * This is required because Firefox fires `keypress` events for key commands\n * (cut, copy, select-all, etc.) even though no character is inserted.\n */\n\nfunction isKeypressCommand(nativeEvent) {\n  return (nativeEvent.ctrlKey || nativeEvent.altKey || nativeEvent.metaKey) && // ctrlKey && altKey is equivalent to AltGr, and is not a command.\n  !(nativeEvent.ctrlKey && nativeEvent.altKey);\n}\n/**\n * Translate native top level events into event types.\n */\n\n\nfunction getCompositionEventType(domEventName) {\n  switch (domEventName) {\n    case 'compositionstart':\n      return 'onCompositionStart';\n\n    case 'compositionend':\n      return 'onCompositionEnd';\n\n    case 'compositionupdate':\n      return 'onCompositionUpdate';\n  }\n}\n/**\n * Does our fallback best-guess model think this event signifies that\n * composition has begun?\n */\n\n\nfunction isFallbackCompositionStart(domEventName, nativeEvent) {\n  return domEventName === 'keydown' && nativeEvent.keyCode === START_KEYCODE;\n}\n/**\n * Does our fallback mode think that this event is the end of composition?\n */\n\n\nfunction isFallbackCompositionEnd(domEventName, nativeEvent) {\n  switch (domEventName) {\n    case 'keyup':\n      // Command keys insert or clear IME input.\n      return END_KEYCODES.indexOf(nativeEvent.keyCode) !== -1;\n\n    case 'keydown':\n      // Expect IME keyCode on each keydown. If we get any other\n      // code we must have exited earlier.\n      return nativeEvent.keyCode !== START_KEYCODE;\n\n    case 'keypress':\n    case 'mousedown':\n    case 'focusout':\n      // Events are not possible without cancelling IME.\n      return true;\n\n    default:\n      return false;\n  }\n}\n/**\n * Google Input Tools provides composition data via a CustomEvent,\n * with the `data` property populated in the `detail` object. If this\n * is available on the event object, use it. If not, this is a plain\n * composition event and we have nothing special to extract.\n *\n * @param {object} nativeEvent\n * @return {?string}\n */\n\n\nfunction getDataFromCustomEvent(nativeEvent) {\n  var detail = nativeEvent.detail;\n\n  if (typeof detail === 'object' && 'data' in detail) {\n    return detail.data;\n  }\n\n  return null;\n}\n/**\n * Check if a composition event was triggered by Korean IME.\n * Our fallback mode does not work well with IE's Korean IME,\n * so just use native composition events when Korean IME is used.\n * Although CompositionEvent.locale property is deprecated,\n * it is available in IE, where our fallback mode is enabled.\n *\n * @param {object} nativeEvent\n * @return {boolean}\n */\n\n\nfunction isUsingKoreanIME(nativeEvent) {\n  return nativeEvent.locale === 'ko';\n} // Track the current IME composition status, if any.\n\n\nvar isComposing = false;\n/**\n * @return {?object} A SyntheticCompositionEvent.\n */\n\nfunction extractCompositionEvent(dispatchQueue, domEventName, targetInst, nativeEvent, nativeEventTarget) {\n  var eventType;\n  var fallbackData;\n\n  if (canUseCompositionEvent) {\n    eventType = getCompositionEventType(domEventName);\n  } else if (!isComposing) {\n    if (isFallbackCompositionStart(domEventName, nativeEvent)) {\n      eventType = 'onCompositionStart';\n    }\n  } else if (isFallbackCompositionEnd(domEventName, nativeEvent)) {\n    eventType = 'onCompositionEnd';\n  }\n\n  if (!eventType) {\n    return null;\n  }\n\n  if (useFallbackCompositionData && !isUsingKoreanIME(nativeEvent)) {\n    // The current composition is stored statically and must not be\n    // overwritten while composition continues.\n    if (!isComposing && eventType === 'onCompositionStart') {\n      isComposing = initialize(nativeEventTarget);\n    } else if (eventType === 'onCompositionEnd') {\n      if (isComposing) {\n        fallbackData = getData();\n      }\n    }\n  }\n\n  var listeners = accumulateTwoPhaseListeners(targetInst, eventType);\n\n  if (listeners.length > 0) {\n    var event = new SyntheticCompositionEvent(eventType, domEventName, null, nativeEvent, nativeEventTarget);\n    dispatchQueue.push({\n      event: event,\n      listeners: listeners\n    });\n\n    if (fallbackData) {\n      // Inject data generated from fallback path into the synthetic event.\n      // This matches the property of native CompositionEventInterface.\n      event.data = fallbackData;\n    } else {\n      var customData = getDataFromCustomEvent(nativeEvent);\n\n      if (customData !== null) {\n        event.data = customData;\n      }\n    }\n  }\n}\n\nfunction getNativeBeforeInputChars(domEventName, nativeEvent) {\n  switch (domEventName) {\n    case 'compositionend':\n      return getDataFromCustomEvent(nativeEvent);\n\n    case 'keypress':\n      /**\n       * If native `textInput` events are available, our goal is to make\n       * use of them. However, there is a special case: the spacebar key.\n       * In Webkit, preventing default on a spacebar `textInput` event\n       * cancels character insertion, but it *also* causes the browser\n       * to fall back to its default spacebar behavior of scrolling the\n       * page.\n       *\n       * Tracking at:\n       * https://code.google.com/p/chromium/issues/detail?id=355103\n       *\n       * To avoid this issue, use the keypress event as if no `textInput`\n       * event is available.\n       */\n      var which = nativeEvent.which;\n\n      if (which !== SPACEBAR_CODE) {\n        return null;\n      }\n\n      hasSpaceKeypress = true;\n      return SPACEBAR_CHAR;\n\n    case 'textInput':\n      // Record the characters to be added to the DOM.\n      var chars = nativeEvent.data; // If it's a spacebar character, assume that we have already handled\n      // it at the keypress level and bail immediately. Android Chrome\n      // doesn't give us keycodes, so we need to ignore it.\n\n      if (chars === SPACEBAR_CHAR && hasSpaceKeypress) {\n        return null;\n      }\n\n      return chars;\n\n    default:\n      // For other native event types, do nothing.\n      return null;\n  }\n}\n/**\n * For browsers that do not provide the `textInput` event, extract the\n * appropriate string to use for SyntheticInputEvent.\n */\n\n\nfunction getFallbackBeforeInputChars(domEventName, nativeEvent) {\n  // If we are currently composing (IME) and using a fallback to do so,\n  // try to extract the composed characters from the fallback object.\n  // If composition event is available, we extract a string only at\n  // compositionevent, otherwise extract it at fallback events.\n  if (isComposing) {\n    if (domEventName === 'compositionend' || !canUseCompositionEvent && isFallbackCompositionEnd(domEventName, nativeEvent)) {\n      var chars = getData();\n      reset();\n      isComposing = false;\n      return chars;\n    }\n\n    return null;\n  }\n\n  switch (domEventName) {\n    case 'paste':\n      // If a paste event occurs after a keypress, throw out the input\n      // chars. Paste events should not lead to BeforeInput events.\n      return null;\n\n    case 'keypress':\n      /**\n       * As of v27, Firefox may fire keypress events even when no character\n       * will be inserted. A few possibilities:\n       *\n       * - `which` is `0`. Arrow keys, Esc key, etc.\n       *\n       * - `which` is the pressed key code, but no char is available.\n       *   Ex: 'AltGr + d` in Polish. There is no modified character for\n       *   this key combination and no character is inserted into the\n       *   document, but FF fires the keypress for char code `100` anyway.\n       *   No `input` event will occur.\n       *\n       * - `which` is the pressed key code, but a command combination is\n       *   being used. Ex: `Cmd+C`. No character is inserted, and no\n       *   `input` event will occur.\n       */\n      if (!isKeypressCommand(nativeEvent)) {\n        // IE fires the `keypress` event when a user types an emoji via\n        // Touch keyboard of Windows.  In such a case, the `char` property\n        // holds an emoji character like `\\uD83D\\uDE0A`.  Because its length\n        // is 2, the property `which` does not represent an emoji correctly.\n        // In such a case, we directly return the `char` property instead of\n        // using `which`.\n        if (nativeEvent.char && nativeEvent.char.length > 1) {\n          return nativeEvent.char;\n        } else if (nativeEvent.which) {\n          return String.fromCharCode(nativeEvent.which);\n        }\n      }\n\n      return null;\n\n    case 'compositionend':\n      return useFallbackCompositionData && !isUsingKoreanIME(nativeEvent) ? null : nativeEvent.data;\n\n    default:\n      return null;\n  }\n}\n/**\n * Extract a SyntheticInputEvent for `beforeInput`, based on either native\n * `textInput` or fallback behavior.\n *\n * @return {?object} A SyntheticInputEvent.\n */\n\n\nfunction extractBeforeInputEvent(dispatchQueue, domEventName, targetInst, nativeEvent, nativeEventTarget) {\n  var chars;\n\n  if (canUseTextInputEvent) {\n    chars = getNativeBeforeInputChars(domEventName, nativeEvent);\n  } else {\n    chars = getFallbackBeforeInputChars(domEventName, nativeEvent);\n  } // If no characters are being inserted, no BeforeInput event should\n  // be fired.\n\n\n  if (!chars) {\n    return null;\n  }\n\n  var listeners = accumulateTwoPhaseListeners(targetInst, 'onBeforeInput');\n\n  if (listeners.length > 0) {\n    var event = new SyntheticInputEvent('onBeforeInput', 'beforeinput', null, nativeEvent, nativeEventTarget);\n    dispatchQueue.push({\n      event: event,\n      listeners: listeners\n    });\n    event.data = chars;\n  }\n}\n/**\n * Create an `onBeforeInput` event to match\n * http://www.w3.org/TR/2013/WD-DOM-Level-3-Events-20131105/#events-inputevents.\n *\n * This event plugin is based on the native `textInput` event\n * available in Chrome, Safari, Opera, and IE. This event fires after\n * `onKeyPress` and `onCompositionEnd`, but before `onInput`.\n *\n * `beforeInput` is spec'd but not implemented in any browsers, and\n * the `input` event does not provide any useful information about what has\n * actually been added, contrary to the spec. Thus, `textInput` is the best\n * available event to identify the characters that have actually been inserted\n * into the target node.\n *\n * This plugin is also responsible for emitting `composition` events, thus\n * allowing us to share composition fallback code for both `beforeInput` and\n * `composition` event types.\n */\n\n\nfunction extractEvents(dispatchQueue, domEventName, targetInst, nativeEvent, nativeEventTarget, eventSystemFlags, targetContainer) {\n  extractCompositionEvent(dispatchQueue, domEventName, targetInst, nativeEvent, nativeEventTarget);\n  extractBeforeInputEvent(dispatchQueue, domEventName, targetInst, nativeEvent, nativeEventTarget);\n}\n\n/**\n * @see http://www.whatwg.org/specs/web-apps/current-work/multipage/the-input-element.html#input-type-attr-summary\n */\nvar supportedInputTypes = {\n  color: true,\n  date: true,\n  datetime: true,\n  'datetime-local': true,\n  email: true,\n  month: true,\n  number: true,\n  password: true,\n  range: true,\n  search: true,\n  tel: true,\n  text: true,\n  time: true,\n  url: true,\n  week: true\n};\n\nfunction isTextInputElement(elem) {\n  var nodeName = elem && elem.nodeName && elem.nodeName.toLowerCase();\n\n  if (nodeName === 'input') {\n    return !!supportedInputTypes[elem.type];\n  }\n\n  if (nodeName === 'textarea') {\n    return true;\n  }\n\n  return false;\n}\n\n/**\n * Checks if an event is supported in the current execution environment.\n *\n * NOTE: This will not work correctly for non-generic events such as `change`,\n * `reset`, `load`, `error`, and `select`.\n *\n * Borrows from Modernizr.\n *\n * @param {string} eventNameSuffix Event name, e.g. \"click\".\n * @return {boolean} True if the event is supported.\n * @internal\n * @license Modernizr 3.0.0pre (Custom Build) | MIT\n */\n\nfunction isEventSupported(eventNameSuffix) {\n  if (!canUseDOM) {\n    return false;\n  }\n\n  var eventName = 'on' + eventNameSuffix;\n  var isSupported = (eventName in document);\n\n  if (!isSupported) {\n    var element = document.createElement('div');\n    element.setAttribute(eventName, 'return;');\n    isSupported = typeof element[eventName] === 'function';\n  }\n\n  return isSupported;\n}\n\nfunction registerEvents$1() {\n  registerTwoPhaseEvent('onChange', ['change', 'click', 'focusin', 'focusout', 'input', 'keydown', 'keyup', 'selectionchange']);\n}\n\nfunction createAndAccumulateChangeEvent(dispatchQueue, inst, nativeEvent, target) {\n  // Flag this event loop as needing state restore.\n  enqueueStateRestore(target);\n  var listeners = accumulateTwoPhaseListeners(inst, 'onChange');\n\n  if (listeners.length > 0) {\n    var event = new SyntheticEvent('onChange', 'change', null, nativeEvent, target);\n    dispatchQueue.push({\n      event: event,\n      listeners: listeners\n    });\n  }\n}\n/**\n * For IE shims\n */\n\n\nvar activeElement = null;\nvar activeElementInst = null;\n/**\n * SECTION: handle `change` event\n */\n\nfunction shouldUseChangeEvent(elem) {\n  var nodeName = elem.nodeName && elem.nodeName.toLowerCase();\n  return nodeName === 'select' || nodeName === 'input' && elem.type === 'file';\n}\n\nfunction manualDispatchChangeEvent(nativeEvent) {\n  var dispatchQueue = [];\n  createAndAccumulateChangeEvent(dispatchQueue, activeElementInst, nativeEvent, getEventTarget(nativeEvent)); // If change and propertychange bubbled, we'd just bind to it like all the\n  // other events and have it go through ReactBrowserEventEmitter. Since it\n  // doesn't, we manually listen for the events and so we have to enqueue and\n  // process the abstract event manually.\n  //\n  // Batching is necessary here in order to ensure that all event handlers run\n  // before the next rerender (including event handlers attached to ancestor\n  // elements instead of directly on the input). Without this, controlled\n  // components don't work properly in conjunction with event bubbling because\n  // the component is rerendered and the value reverted before all the event\n  // handlers can run. See https://github.com/facebook/react/issues/708.\n\n  batchedUpdates(runEventInBatch, dispatchQueue);\n}\n\nfunction runEventInBatch(dispatchQueue) {\n  processDispatchQueue(dispatchQueue, 0);\n}\n\nfunction getInstIfValueChanged(targetInst) {\n  var targetNode = getNodeFromInstance(targetInst);\n\n  if (updateValueIfChanged(targetNode)) {\n    return targetInst;\n  }\n}\n\nfunction getTargetInstForChangeEvent(domEventName, targetInst) {\n  if (domEventName === 'change') {\n    return targetInst;\n  }\n}\n/**\n * SECTION: handle `input` event\n */\n\n\nvar isInputEventSupported = false;\n\nif (canUseDOM) {\n  // IE9 claims to support the input event but fails to trigger it when\n  // deleting text, so we ignore its input events.\n  isInputEventSupported = isEventSupported('input') && (!document.documentMode || document.documentMode > 9);\n}\n/**\n * (For IE <=9) Starts tracking propertychange events on the passed-in element\n * and override the value property so that we can distinguish user events from\n * value changes in JS.\n */\n\n\nfunction startWatchingForValueChange(target, targetInst) {\n  activeElement = target;\n  activeElementInst = targetInst;\n  activeElement.attachEvent('onpropertychange', handlePropertyChange);\n}\n/**\n * (For IE <=9) Removes the event listeners from the currently-tracked element,\n * if any exists.\n */\n\n\nfunction stopWatchingForValueChange() {\n  if (!activeElement) {\n    return;\n  }\n\n  activeElement.detachEvent('onpropertychange', handlePropertyChange);\n  activeElement = null;\n  activeElementInst = null;\n}\n/**\n * (For IE <=9) Handles a propertychange event, sending a `change` event if\n * the value of the active element has changed.\n */\n\n\nfunction handlePropertyChange(nativeEvent) {\n  if (nativeEvent.propertyName !== 'value') {\n    return;\n  }\n\n  if (getInstIfValueChanged(activeElementInst)) {\n    manualDispatchChangeEvent(nativeEvent);\n  }\n}\n\nfunction handleEventsForInputEventPolyfill(domEventName, target, targetInst) {\n  if (domEventName === 'focusin') {\n    // In IE9, propertychange fires for most input events but is buggy and\n    // doesn't fire when text is deleted, but conveniently, selectionchange\n    // appears to fire in all of the remaining cases so we catch those and\n    // forward the event if the value has changed\n    // In either case, we don't want to call the event handler if the value\n    // is changed from JS so we redefine a setter for `.value` that updates\n    // our activeElementValue variable, allowing us to ignore those changes\n    //\n    // stopWatching() should be a noop here but we call it just in case we\n    // missed a blur event somehow.\n    stopWatchingForValueChange();\n    startWatchingForValueChange(target, targetInst);\n  } else if (domEventName === 'focusout') {\n    stopWatchingForValueChange();\n  }\n} // For IE8 and IE9.\n\n\nfunction getTargetInstForInputEventPolyfill(domEventName, targetInst) {\n  if (domEventName === 'selectionchange' || domEventName === 'keyup' || domEventName === 'keydown') {\n    // On the selectionchange event, the target is just document which isn't\n    // helpful for us so just check activeElement instead.\n    //\n    // 99% of the time, keydown and keyup aren't necessary. IE8 fails to fire\n    // propertychange on the first input event after setting `value` from a\n    // script and fires only keydown, keypress, keyup. Catching keyup usually\n    // gets it and catching keydown lets us fire an event for the first\n    // keystroke if user does a key repeat (it'll be a little delayed: right\n    // before the second keystroke). Other input methods (e.g., paste) seem to\n    // fire selectionchange normally.\n    return getInstIfValueChanged(activeElementInst);\n  }\n}\n/**\n * SECTION: handle `click` event\n */\n\n\nfunction shouldUseClickEvent(elem) {\n  // Use the `click` event to detect changes to checkbox and radio inputs.\n  // This approach works across all browsers, whereas `change` does not fire\n  // until `blur` in IE8.\n  var nodeName = elem.nodeName;\n  return nodeName && nodeName.toLowerCase() === 'input' && (elem.type === 'checkbox' || elem.type === 'radio');\n}\n\nfunction getTargetInstForClickEvent(domEventName, targetInst) {\n  if (domEventName === 'click') {\n    return getInstIfValueChanged(targetInst);\n  }\n}\n\nfunction getTargetInstForInputOrChangeEvent(domEventName, targetInst) {\n  if (domEventName === 'input' || domEventName === 'change') {\n    return getInstIfValueChanged(targetInst);\n  }\n}\n\nfunction handleControlledInputBlur(node) {\n  var state = node._wrapperState;\n\n  if (!state || !state.controlled || node.type !== 'number') {\n    return;\n  }\n\n  {\n    // If controlled, assign the value attribute to the current value on blur\n    setDefaultValue(node, 'number', node.value);\n  }\n}\n/**\n * This plugin creates an `onChange` event that normalizes change events\n * across form elements. This event fires at a time when it's possible to\n * change the element's value without seeing a flicker.\n *\n * Supported elements are:\n * - input (see `isTextInputElement`)\n * - textarea\n * - select\n */\n\n\nfunction extractEvents$1(dispatchQueue, domEventName, targetInst, nativeEvent, nativeEventTarget, eventSystemFlags, targetContainer) {\n  var targetNode = targetInst ? getNodeFromInstance(targetInst) : window;\n  var getTargetInstFunc, handleEventFunc;\n\n  if (shouldUseChangeEvent(targetNode)) {\n    getTargetInstFunc = getTargetInstForChangeEvent;\n  } else if (isTextInputElement(targetNode)) {\n    if (isInputEventSupported) {\n      getTargetInstFunc = getTargetInstForInputOrChangeEvent;\n    } else {\n      getTargetInstFunc = getTargetInstForInputEventPolyfill;\n      handleEventFunc = handleEventsForInputEventPolyfill;\n    }\n  } else if (shouldUseClickEvent(targetNode)) {\n    getTargetInstFunc = getTargetInstForClickEvent;\n  }\n\n  if (getTargetInstFunc) {\n    var inst = getTargetInstFunc(domEventName, targetInst);\n\n    if (inst) {\n      createAndAccumulateChangeEvent(dispatchQueue, inst, nativeEvent, nativeEventTarget);\n      return;\n    }\n  }\n\n  if (handleEventFunc) {\n    handleEventFunc(domEventName, targetNode, targetInst);\n  } // When blurring, set the value attribute for number inputs\n\n\n  if (domEventName === 'focusout') {\n    handleControlledInputBlur(targetNode);\n  }\n}\n\nfunction registerEvents$2() {\n  registerDirectEvent('onMouseEnter', ['mouseout', 'mouseover']);\n  registerDirectEvent('onMouseLeave', ['mouseout', 'mouseover']);\n  registerDirectEvent('onPointerEnter', ['pointerout', 'pointerover']);\n  registerDirectEvent('onPointerLeave', ['pointerout', 'pointerover']);\n}\n/**\n * For almost every interaction we care about, there will be both a top-level\n * `mouseover` and `mouseout` event that occurs. Only use `mouseout` so that\n * we do not extract duplicate events. However, moving the mouse into the\n * browser from outside will not fire a `mouseout` event. In this case, we use\n * the `mouseover` top-level event.\n */\n\n\nfunction extractEvents$2(dispatchQueue, domEventName, targetInst, nativeEvent, nativeEventTarget, eventSystemFlags, targetContainer) {\n  var isOverEvent = domEventName === 'mouseover' || domEventName === 'pointerover';\n  var isOutEvent = domEventName === 'mouseout' || domEventName === 'pointerout';\n\n  if (isOverEvent && (eventSystemFlags & IS_REPLAYED) === 0) {\n    // If this is an over event with a target, we might have already dispatched\n    // the event in the out event of the other target. If this is replayed,\n    // then it's because we couldn't dispatch against this target previously\n    // so we have to do it now instead.\n    var related = nativeEvent.relatedTarget || nativeEvent.fromElement;\n\n    if (related) {\n      // If the related node is managed by React, we can assume that we have\n      // already dispatched the corresponding events during its mouseout.\n      if (getClosestInstanceFromNode(related) || isContainerMarkedAsRoot(related)) {\n        return;\n      }\n    }\n  }\n\n  if (!isOutEvent && !isOverEvent) {\n    // Must not be a mouse or pointer in or out - ignoring.\n    return;\n  }\n\n  var win; // TODO: why is this nullable in the types but we read from it?\n\n  if (nativeEventTarget.window === nativeEventTarget) {\n    // `nativeEventTarget` is probably a window object.\n    win = nativeEventTarget;\n  } else {\n    // TODO: Figure out why `ownerDocument` is sometimes undefined in IE8.\n    var doc = nativeEventTarget.ownerDocument;\n\n    if (doc) {\n      win = doc.defaultView || doc.parentWindow;\n    } else {\n      win = window;\n    }\n  }\n\n  var from;\n  var to;\n\n  if (isOutEvent) {\n    var _related = nativeEvent.relatedTarget || nativeEvent.toElement;\n\n    from = targetInst;\n    to = _related ? getClosestInstanceFromNode(_related) : null;\n\n    if (to !== null) {\n      var nearestMounted = getNearestMountedFiber(to);\n\n      if (to !== nearestMounted || to.tag !== HostComponent && to.tag !== HostText) {\n        to = null;\n      }\n    }\n  } else {\n    // Moving to a node from outside the window.\n    from = null;\n    to = targetInst;\n  }\n\n  if (from === to) {\n    // Nothing pertains to our managed components.\n    return;\n  }\n\n  var SyntheticEventCtor = SyntheticMouseEvent;\n  var leaveEventType = 'onMouseLeave';\n  var enterEventType = 'onMouseEnter';\n  var eventTypePrefix = 'mouse';\n\n  if (domEventName === 'pointerout' || domEventName === 'pointerover') {\n    SyntheticEventCtor = SyntheticPointerEvent;\n    leaveEventType = 'onPointerLeave';\n    enterEventType = 'onPointerEnter';\n    eventTypePrefix = 'pointer';\n  }\n\n  var fromNode = from == null ? win : getNodeFromInstance(from);\n  var toNode = to == null ? win : getNodeFromInstance(to);\n  var leave = new SyntheticEventCtor(leaveEventType, eventTypePrefix + 'leave', from, nativeEvent, nativeEventTarget);\n  leave.target = fromNode;\n  leave.relatedTarget = toNode;\n  var enter = null; // We should only process this nativeEvent if we are processing\n  // the first ancestor. Next time, we will ignore the event.\n\n  var nativeTargetInst = getClosestInstanceFromNode(nativeEventTarget);\n\n  if (nativeTargetInst === targetInst) {\n    var enterEvent = new SyntheticEventCtor(enterEventType, eventTypePrefix + 'enter', to, nativeEvent, nativeEventTarget);\n    enterEvent.target = toNode;\n    enterEvent.relatedTarget = fromNode;\n    enter = enterEvent;\n  }\n\n  accumulateEnterLeaveTwoPhaseListeners(dispatchQueue, leave, enter, from, to);\n}\n\n/**\n * inlined Object.is polyfill to avoid requiring consumers ship their own\n * https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/is\n */\nfunction is(x, y) {\n  return x === y && (x !== 0 || 1 / x === 1 / y) || x !== x && y !== y // eslint-disable-line no-self-compare\n  ;\n}\n\nvar objectIs = typeof Object.is === 'function' ? Object.is : is;\n\nvar hasOwnProperty$2 = Object.prototype.hasOwnProperty;\n/**\n * Performs equality by iterating through keys on an object and returning false\n * when any key has values which are not strictly equal between the arguments.\n * Returns true when the values of all keys are strictly equal.\n */\n\nfunction shallowEqual(objA, objB) {\n  if (objectIs(objA, objB)) {\n    return true;\n  }\n\n  if (typeof objA !== 'object' || objA === null || typeof objB !== 'object' || objB === null) {\n    return false;\n  }\n\n  var keysA = Object.keys(objA);\n  var keysB = Object.keys(objB);\n\n  if (keysA.length !== keysB.length) {\n    return false;\n  } // Test for A's keys different from B.\n\n\n  for (var i = 0; i < keysA.length; i++) {\n    if (!hasOwnProperty$2.call(objB, keysA[i]) || !objectIs(objA[keysA[i]], objB[keysA[i]])) {\n      return false;\n    }\n  }\n\n  return true;\n}\n\n/**\n * Given any node return the first leaf node without children.\n *\n * @param {DOMElement|DOMTextNode} node\n * @return {DOMElement|DOMTextNode}\n */\n\nfunction getLeafNode(node) {\n  while (node && node.firstChild) {\n    node = node.firstChild;\n  }\n\n  return node;\n}\n/**\n * Get the next sibling within a container. This will walk up the\n * DOM if a node's siblings have been exhausted.\n *\n * @param {DOMElement|DOMTextNode} node\n * @return {?DOMElement|DOMTextNode}\n */\n\n\nfunction getSiblingNode(node) {\n  while (node) {\n    if (node.nextSibling) {\n      return node.nextSibling;\n    }\n\n    node = node.parentNode;\n  }\n}\n/**\n * Get object describing the nodes which contain characters at offset.\n *\n * @param {DOMElement|DOMTextNode} root\n * @param {number} offset\n * @return {?object}\n */\n\n\nfunction getNodeForCharacterOffset(root, offset) {\n  var node = getLeafNode(root);\n  var nodeStart = 0;\n  var nodeEnd = 0;\n\n  while (node) {\n    if (node.nodeType === TEXT_NODE) {\n      nodeEnd = nodeStart + node.textContent.length;\n\n      if (nodeStart <= offset && nodeEnd >= offset) {\n        return {\n          node: node,\n          offset: offset - nodeStart\n        };\n      }\n\n      nodeStart = nodeEnd;\n    }\n\n    node = getLeafNode(getSiblingNode(node));\n  }\n}\n\n/**\n * @param {DOMElement} outerNode\n * @return {?object}\n */\n\nfunction getOffsets(outerNode) {\n  var ownerDocument = outerNode.ownerDocument;\n  var win = ownerDocument && ownerDocument.defaultView || window;\n  var selection = win.getSelection && win.getSelection();\n\n  if (!selection || selection.rangeCount === 0) {\n    return null;\n  }\n\n  var anchorNode = selection.anchorNode,\n      anchorOffset = selection.anchorOffset,\n      focusNode = selection.focusNode,\n      focusOffset = selection.focusOffset; // In Firefox, anchorNode and focusNode can be \"anonymous divs\", e.g. the\n  // up/down buttons on an <input type=\"number\">. Anonymous divs do not seem to\n  // expose properties, triggering a \"Permission denied error\" if any of its\n  // properties are accessed. The only seemingly possible way to avoid erroring\n  // is to access a property that typically works for non-anonymous divs and\n  // catch any error that may otherwise arise. See\n  // https://bugzilla.mozilla.org/show_bug.cgi?id=208427\n\n  try {\n    /* eslint-disable no-unused-expressions */\n    anchorNode.nodeType;\n    focusNode.nodeType;\n    /* eslint-enable no-unused-expressions */\n  } catch (e) {\n    return null;\n  }\n\n  return getModernOffsetsFromPoints(outerNode, anchorNode, anchorOffset, focusNode, focusOffset);\n}\n/**\n * Returns {start, end} where `start` is the character/codepoint index of\n * (anchorNode, anchorOffset) within the textContent of `outerNode`, and\n * `end` is the index of (focusNode, focusOffset).\n *\n * Returns null if you pass in garbage input but we should probably just crash.\n *\n * Exported only for testing.\n */\n\nfunction getModernOffsetsFromPoints(outerNode, anchorNode, anchorOffset, focusNode, focusOffset) {\n  var length = 0;\n  var start = -1;\n  var end = -1;\n  var indexWithinAnchor = 0;\n  var indexWithinFocus = 0;\n  var node = outerNode;\n  var parentNode = null;\n\n  outer: while (true) {\n    var next = null;\n\n    while (true) {\n      if (node === anchorNode && (anchorOffset === 0 || node.nodeType === TEXT_NODE)) {\n        start = length + anchorOffset;\n      }\n\n      if (node === focusNode && (focusOffset === 0 || node.nodeType === TEXT_NODE)) {\n        end = length + focusOffset;\n      }\n\n      if (node.nodeType === TEXT_NODE) {\n        length += node.nodeValue.length;\n      }\n\n      if ((next = node.firstChild) === null) {\n        break;\n      } // Moving from `node` to its first child `next`.\n\n\n      parentNode = node;\n      node = next;\n    }\n\n    while (true) {\n      if (node === outerNode) {\n        // If `outerNode` has children, this is always the second time visiting\n        // it. If it has no children, this is still the first loop, and the only\n        // valid selection is anchorNode and focusNode both equal to this node\n        // and both offsets 0, in which case we will have handled above.\n        break outer;\n      }\n\n      if (parentNode === anchorNode && ++indexWithinAnchor === anchorOffset) {\n        start = length;\n      }\n\n      if (parentNode === focusNode && ++indexWithinFocus === focusOffset) {\n        end = length;\n      }\n\n      if ((next = node.nextSibling) !== null) {\n        break;\n      }\n\n      node = parentNode;\n      parentNode = node.parentNode;\n    } // Moving from `node` to its next sibling `next`.\n\n\n    node = next;\n  }\n\n  if (start === -1 || end === -1) {\n    // This should never happen. (Would happen if the anchor/focus nodes aren't\n    // actually inside the passed-in node.)\n    return null;\n  }\n\n  return {\n    start: start,\n    end: end\n  };\n}\n/**\n * In modern non-IE browsers, we can support both forward and backward\n * selections.\n *\n * Note: IE10+ supports the Selection object, but it does not support\n * the `extend` method, which means that even in modern IE, it's not possible\n * to programmatically create a backward selection. Thus, for all IE\n * versions, we use the old IE API to create our selections.\n *\n * @param {DOMElement|DOMTextNode} node\n * @param {object} offsets\n */\n\nfunction setOffsets(node, offsets) {\n  var doc = node.ownerDocument || document;\n  var win = doc && doc.defaultView || window; // Edge fails with \"Object expected\" in some scenarios.\n  // (For instance: TinyMCE editor used in a list component that supports pasting to add more,\n  // fails when pasting 100+ items)\n\n  if (!win.getSelection) {\n    return;\n  }\n\n  var selection = win.getSelection();\n  var length = node.textContent.length;\n  var start = Math.min(offsets.start, length);\n  var end = offsets.end === undefined ? start : Math.min(offsets.end, length); // IE 11 uses modern selection, but doesn't support the extend method.\n  // Flip backward selections, so we can set with a single range.\n\n  if (!selection.extend && start > end) {\n    var temp = end;\n    end = start;\n    start = temp;\n  }\n\n  var startMarker = getNodeForCharacterOffset(node, start);\n  var endMarker = getNodeForCharacterOffset(node, end);\n\n  if (startMarker && endMarker) {\n    if (selection.rangeCount === 1 && selection.anchorNode === startMarker.node && selection.anchorOffset === startMarker.offset && selection.focusNode === endMarker.node && selection.focusOffset === endMarker.offset) {\n      return;\n    }\n\n    var range = doc.createRange();\n    range.setStart(startMarker.node, startMarker.offset);\n    selection.removeAllRanges();\n\n    if (start > end) {\n      selection.addRange(range);\n      selection.extend(endMarker.node, endMarker.offset);\n    } else {\n      range.setEnd(endMarker.node, endMarker.offset);\n      selection.addRange(range);\n    }\n  }\n}\n\nfunction isTextNode(node) {\n  return node && node.nodeType === TEXT_NODE;\n}\n\nfunction containsNode(outerNode, innerNode) {\n  if (!outerNode || !innerNode) {\n    return false;\n  } else if (outerNode === innerNode) {\n    return true;\n  } else if (isTextNode(outerNode)) {\n    return false;\n  } else if (isTextNode(innerNode)) {\n    return containsNode(outerNode, innerNode.parentNode);\n  } else if ('contains' in outerNode) {\n    return outerNode.contains(innerNode);\n  } else if (outerNode.compareDocumentPosition) {\n    return !!(outerNode.compareDocumentPosition(innerNode) & 16);\n  } else {\n    return false;\n  }\n}\n\nfunction isInDocument(node) {\n  return node && node.ownerDocument && containsNode(node.ownerDocument.documentElement, node);\n}\n\nfunction isSameOriginFrame(iframe) {\n  try {\n    // Accessing the contentDocument of a HTMLIframeElement can cause the browser\n    // to throw, e.g. if it has a cross-origin src attribute.\n    // Safari will show an error in the console when the access results in \"Blocked a frame with origin\". e.g:\n    // iframe.contentDocument.defaultView;\n    // A safety way is to access one of the cross origin properties: Window or Location\n    // Which might result in \"SecurityError\" DOM Exception and it is compatible to Safari.\n    // https://html.spec.whatwg.org/multipage/browsers.html#integration-with-idl\n    return typeof iframe.contentWindow.location.href === 'string';\n  } catch (err) {\n    return false;\n  }\n}\n\nfunction getActiveElementDeep() {\n  var win = window;\n  var element = getActiveElement();\n\n  while (element instanceof win.HTMLIFrameElement) {\n    if (isSameOriginFrame(element)) {\n      win = element.contentWindow;\n    } else {\n      return element;\n    }\n\n    element = getActiveElement(win.document);\n  }\n\n  return element;\n}\n/**\n * @ReactInputSelection: React input selection module. Based on Selection.js,\n * but modified to be suitable for react and has a couple of bug fixes (doesn't\n * assume buttons have range selections allowed).\n * Input selection module for React.\n */\n\n/**\n * @hasSelectionCapabilities: we get the element types that support selection\n * from https://html.spec.whatwg.org/#do-not-apply, looking at `selectionStart`\n * and `selectionEnd` rows.\n */\n\n\nfunction hasSelectionCapabilities(elem) {\n  var nodeName = elem && elem.nodeName && elem.nodeName.toLowerCase();\n  return nodeName && (nodeName === 'input' && (elem.type === 'text' || elem.type === 'search' || elem.type === 'tel' || elem.type === 'url' || elem.type === 'password') || nodeName === 'textarea' || elem.contentEditable === 'true');\n}\nfunction getSelectionInformation() {\n  var focusedElem = getActiveElementDeep();\n  return {\n    focusedElem: focusedElem,\n    selectionRange: hasSelectionCapabilities(focusedElem) ? getSelection(focusedElem) : null\n  };\n}\n/**\n * @restoreSelection: If any selection information was potentially lost,\n * restore it. This is useful when performing operations that could remove dom\n * nodes and place them back in, resulting in focus being lost.\n */\n\nfunction restoreSelection(priorSelectionInformation) {\n  var curFocusedElem = getActiveElementDeep();\n  var priorFocusedElem = priorSelectionInformation.focusedElem;\n  var priorSelectionRange = priorSelectionInformation.selectionRange;\n\n  if (curFocusedElem !== priorFocusedElem && isInDocument(priorFocusedElem)) {\n    if (priorSelectionRange !== null && hasSelectionCapabilities(priorFocusedElem)) {\n      setSelection(priorFocusedElem, priorSelectionRange);\n    } // Focusing a node can change the scroll position, which is undesirable\n\n\n    var ancestors = [];\n    var ancestor = priorFocusedElem;\n\n    while (ancestor = ancestor.parentNode) {\n      if (ancestor.nodeType === ELEMENT_NODE) {\n        ancestors.push({\n          element: ancestor,\n          left: ancestor.scrollLeft,\n          top: ancestor.scrollTop\n        });\n      }\n    }\n\n    if (typeof priorFocusedElem.focus === 'function') {\n      priorFocusedElem.focus();\n    }\n\n    for (var i = 0; i < ancestors.length; i++) {\n      var info = ancestors[i];\n      info.element.scrollLeft = info.left;\n      info.element.scrollTop = info.top;\n    }\n  }\n}\n/**\n * @getSelection: Gets the selection bounds of a focused textarea, input or\n * contentEditable node.\n * -@input: Look up selection bounds of this input\n * -@return {start: selectionStart, end: selectionEnd}\n */\n\nfunction getSelection(input) {\n  var selection;\n\n  if ('selectionStart' in input) {\n    // Modern browser with input or textarea.\n    selection = {\n      start: input.selectionStart,\n      end: input.selectionEnd\n    };\n  } else {\n    // Content editable or old IE textarea.\n    selection = getOffsets(input);\n  }\n\n  return selection || {\n    start: 0,\n    end: 0\n  };\n}\n/**\n * @setSelection: Sets the selection bounds of a textarea or input and focuses\n * the input.\n * -@input     Set selection bounds of this input or textarea\n * -@offsets   Object of same form that is returned from get*\n */\n\nfunction setSelection(input, offsets) {\n  var start = offsets.start;\n  var end = offsets.end;\n\n  if (end === undefined) {\n    end = start;\n  }\n\n  if ('selectionStart' in input) {\n    input.selectionStart = start;\n    input.selectionEnd = Math.min(end, input.value.length);\n  } else {\n    setOffsets(input, offsets);\n  }\n}\n\nvar skipSelectionChangeEvent = canUseDOM && 'documentMode' in document && document.documentMode <= 11;\n\nfunction registerEvents$3() {\n  registerTwoPhaseEvent('onSelect', ['focusout', 'contextmenu', 'dragend', 'focusin', 'keydown', 'keyup', 'mousedown', 'mouseup', 'selectionchange']);\n}\n\nvar activeElement$1 = null;\nvar activeElementInst$1 = null;\nvar lastSelection = null;\nvar mouseDown = false;\n/**\n * Get an object which is a unique representation of the current selection.\n *\n * The return value will not be consistent across nodes or browsers, but\n * two identical selections on the same node will return identical objects.\n */\n\nfunction getSelection$1(node) {\n  if ('selectionStart' in node && hasSelectionCapabilities(node)) {\n    return {\n      start: node.selectionStart,\n      end: node.selectionEnd\n    };\n  } else {\n    var win = node.ownerDocument && node.ownerDocument.defaultView || window;\n    var selection = win.getSelection();\n    return {\n      anchorNode: selection.anchorNode,\n      anchorOffset: selection.anchorOffset,\n      focusNode: selection.focusNode,\n      focusOffset: selection.focusOffset\n    };\n  }\n}\n/**\n * Get document associated with the event target.\n */\n\n\nfunction getEventTargetDocument(eventTarget) {\n  return eventTarget.window === eventTarget ? eventTarget.document : eventTarget.nodeType === DOCUMENT_NODE ? eventTarget : eventTarget.ownerDocument;\n}\n/**\n * Poll selection to see whether it's changed.\n *\n * @param {object} nativeEvent\n * @param {object} nativeEventTarget\n * @return {?SyntheticEvent}\n */\n\n\nfunction constructSelectEvent(dispatchQueue, nativeEvent, nativeEventTarget) {\n  // Ensure we have the right element, and that the user is not dragging a\n  // selection (this matches native `select` event behavior). In HTML5, select\n  // fires only on input and textarea thus if there's no focused element we\n  // won't dispatch.\n  var doc = getEventTargetDocument(nativeEventTarget);\n\n  if (mouseDown || activeElement$1 == null || activeElement$1 !== getActiveElement(doc)) {\n    return;\n  } // Only fire when selection has actually changed.\n\n\n  var currentSelection = getSelection$1(activeElement$1);\n\n  if (!lastSelection || !shallowEqual(lastSelection, currentSelection)) {\n    lastSelection = currentSelection;\n    var listeners = accumulateTwoPhaseListeners(activeElementInst$1, 'onSelect');\n\n    if (listeners.length > 0) {\n      var event = new SyntheticEvent('onSelect', 'select', null, nativeEvent, nativeEventTarget);\n      dispatchQueue.push({\n        event: event,\n        listeners: listeners\n      });\n      event.target = activeElement$1;\n    }\n  }\n}\n/**\n * This plugin creates an `onSelect` event that normalizes select events\n * across form elements.\n *\n * Supported elements are:\n * - input (see `isTextInputElement`)\n * - textarea\n * - contentEditable\n *\n * This differs from native browser implementations in the following ways:\n * - Fires on contentEditable fields as well as inputs.\n * - Fires for collapsed selection.\n * - Fires after user input.\n */\n\n\nfunction extractEvents$3(dispatchQueue, domEventName, targetInst, nativeEvent, nativeEventTarget, eventSystemFlags, targetContainer) {\n\n  var targetNode = targetInst ? getNodeFromInstance(targetInst) : window;\n\n  switch (domEventName) {\n    // Track the input node that has focus.\n    case 'focusin':\n      if (isTextInputElement(targetNode) || targetNode.contentEditable === 'true') {\n        activeElement$1 = targetNode;\n        activeElementInst$1 = targetInst;\n        lastSelection = null;\n      }\n\n      break;\n\n    case 'focusout':\n      activeElement$1 = null;\n      activeElementInst$1 = null;\n      lastSelection = null;\n      break;\n    // Don't fire the event while the user is dragging. This matches the\n    // semantics of the native select event.\n\n    case 'mousedown':\n      mouseDown = true;\n      break;\n\n    case 'contextmenu':\n    case 'mouseup':\n    case 'dragend':\n      mouseDown = false;\n      constructSelectEvent(dispatchQueue, nativeEvent, nativeEventTarget);\n      break;\n    // Chrome and IE fire non-standard event when selection is changed (and\n    // sometimes when it hasn't). IE's event fires out of order with respect\n    // to key and input events on deletion, so we discard it.\n    //\n    // Firefox doesn't support selectionchange, so check selection status\n    // after each key entry. The selection changes after keydown and before\n    // keyup, but we check on keydown as well in the case of holding down a\n    // key, when multiple keydown events are fired but only one keyup is.\n    // This is also our approach for IE handling, for the reason above.\n\n    case 'selectionchange':\n      if (skipSelectionChangeEvent) {\n        break;\n      }\n\n    // falls through\n\n    case 'keydown':\n    case 'keyup':\n      constructSelectEvent(dispatchQueue, nativeEvent, nativeEventTarget);\n  }\n}\n\nfunction extractEvents$4(dispatchQueue, domEventName, targetInst, nativeEvent, nativeEventTarget, eventSystemFlags, targetContainer) {\n  var reactName = topLevelEventsToReactNames.get(domEventName);\n\n  if (reactName === undefined) {\n    return;\n  }\n\n  var SyntheticEventCtor = SyntheticEvent;\n  var reactEventType = domEventName;\n\n  switch (domEventName) {\n    case 'keypress':\n      // Firefox creates a keypress event for function keys too. This removes\n      // the unwanted keypress events. Enter is however both printable and\n      // non-printable. One would expect Tab to be as well (but it isn't).\n      if (getEventCharCode(nativeEvent) === 0) {\n        return;\n      }\n\n    /* falls through */\n\n    case 'keydown':\n    case 'keyup':\n      SyntheticEventCtor = SyntheticKeyboardEvent;\n      break;\n\n    case 'focusin':\n      reactEventType = 'focus';\n      SyntheticEventCtor = SyntheticFocusEvent;\n      break;\n\n    case 'focusout':\n      reactEventType = 'blur';\n      SyntheticEventCtor = SyntheticFocusEvent;\n      break;\n\n    case 'beforeblur':\n    case 'afterblur':\n      SyntheticEventCtor = SyntheticFocusEvent;\n      break;\n\n    case 'click':\n      // Firefox creates a click event on right mouse clicks. This removes the\n      // unwanted click events.\n      if (nativeEvent.button === 2) {\n        return;\n      }\n\n    /* falls through */\n\n    case 'auxclick':\n    case 'dblclick':\n    case 'mousedown':\n    case 'mousemove':\n    case 'mouseup': // TODO: Disabled elements should not respond to mouse events\n\n    /* falls through */\n\n    case 'mouseout':\n    case 'mouseover':\n    case 'contextmenu':\n      SyntheticEventCtor = SyntheticMouseEvent;\n      break;\n\n    case 'drag':\n    case 'dragend':\n    case 'dragenter':\n    case 'dragexit':\n    case 'dragleave':\n    case 'dragover':\n    case 'dragstart':\n    case 'drop':\n      SyntheticEventCtor = SyntheticDragEvent;\n      break;\n\n    case 'touchcancel':\n    case 'touchend':\n    case 'touchmove':\n    case 'touchstart':\n      SyntheticEventCtor = SyntheticTouchEvent;\n      break;\n\n    case ANIMATION_END:\n    case ANIMATION_ITERATION:\n    case ANIMATION_START:\n      SyntheticEventCtor = SyntheticAnimationEvent;\n      break;\n\n    case TRANSITION_END:\n      SyntheticEventCtor = SyntheticTransitionEvent;\n      break;\n\n    case 'scroll':\n      SyntheticEventCtor = SyntheticUIEvent;\n      break;\n\n    case 'wheel':\n      SyntheticEventCtor = SyntheticWheelEvent;\n      break;\n\n    case 'copy':\n    case 'cut':\n    case 'paste':\n      SyntheticEventCtor = SyntheticClipboardEvent;\n      break;\n\n    case 'gotpointercapture':\n    case 'lostpointercapture':\n    case 'pointercancel':\n    case 'pointerdown':\n    case 'pointermove':\n    case 'pointerout':\n    case 'pointerover':\n    case 'pointerup':\n      SyntheticEventCtor = SyntheticPointerEvent;\n      break;\n  }\n\n  var inCapturePhase = (eventSystemFlags & IS_CAPTURE_PHASE) !== 0;\n\n  {\n    // Some events don't bubble in the browser.\n    // In the past, React has always bubbled them, but this can be surprising.\n    // We're going to try aligning closer to the browser behavior by not bubbling\n    // them in React either. We'll start by not bubbling onScroll, and then expand.\n    var accumulateTargetOnly = !inCapturePhase && // TODO: ideally, we'd eventually add all events from\n    // nonDelegatedEvents list in DOMPluginEventSystem.\n    // Then we can remove this special list.\n    // This is a breaking change that can wait until React 18.\n    domEventName === 'scroll';\n\n    var _listeners = accumulateSinglePhaseListeners(targetInst, reactName, nativeEvent.type, inCapturePhase, accumulateTargetOnly);\n\n    if (_listeners.length > 0) {\n      // Intentionally create event lazily.\n      var _event = new SyntheticEventCtor(reactName, reactEventType, null, nativeEvent, nativeEventTarget);\n\n      dispatchQueue.push({\n        event: _event,\n        listeners: _listeners\n      });\n    }\n  }\n}\n\n// TODO: remove top-level side effect.\nregisterSimpleEvents();\nregisterEvents$2();\nregisterEvents$1();\nregisterEvents$3();\nregisterEvents();\n\nfunction extractEvents$5(dispatchQueue, domEventName, targetInst, nativeEvent, nativeEventTarget, eventSystemFlags, targetContainer) {\n  // TODO: we should remove the concept of a \"SimpleEventPlugin\".\n  // This is the basic functionality of the event system. All\n  // the other plugins are essentially polyfills. So the plugin\n  // should probably be inlined somewhere and have its logic\n  // be core the to event system. This would potentially allow\n  // us to ship builds of React without the polyfilled plugins below.\n  extractEvents$4(dispatchQueue, domEventName, targetInst, nativeEvent, nativeEventTarget, eventSystemFlags);\n  var shouldProcessPolyfillPlugins = (eventSystemFlags & SHOULD_NOT_PROCESS_POLYFILL_EVENT_PLUGINS) === 0; // We don't process these events unless we are in the\n  // event's native \"bubble\" phase, which means that we're\n  // not in the capture phase. That's because we emulate\n  // the capture phase here still. This is a trade-off,\n  // because in an ideal world we would not emulate and use\n  // the phases properly, like we do with the SimpleEvent\n  // plugin. However, the plugins below either expect\n  // emulation (EnterLeave) or use state localized to that\n  // plugin (BeforeInput, Change, Select). The state in\n  // these modules complicates things, as you'll essentially\n  // get the case where the capture phase event might change\n  // state, only for the following bubble event to come in\n  // later and not trigger anything as the state now\n  // invalidates the heuristics of the event plugin. We\n  // could alter all these plugins to work in such ways, but\n  // that might cause other unknown side-effects that we\n  // can't forsee right now.\n\n  if (shouldProcessPolyfillPlugins) {\n    extractEvents$2(dispatchQueue, domEventName, targetInst, nativeEvent, nativeEventTarget, eventSystemFlags);\n    extractEvents$1(dispatchQueue, domEventName, targetInst, nativeEvent, nativeEventTarget);\n    extractEvents$3(dispatchQueue, domEventName, targetInst, nativeEvent, nativeEventTarget);\n    extractEvents(dispatchQueue, domEventName, targetInst, nativeEvent, nativeEventTarget);\n  }\n} // List of events that need to be individually attached to media elements.\n\n\nvar mediaEventTypes = ['abort', 'canplay', 'canplaythrough', 'durationchange', 'emptied', 'encrypted', 'ended', 'error', 'loadeddata', 'loadedmetadata', 'loadstart', 'pause', 'play', 'playing', 'progress', 'ratechange', 'seeked', 'seeking', 'stalled', 'suspend', 'timeupdate', 'volumechange', 'waiting']; // We should not delegate these events to the container, but rather\n// set them on the actual target element itself. This is primarily\n// because these events do not consistently bubble in the DOM.\n\nvar nonDelegatedEvents = new Set(['cancel', 'close', 'invalid', 'load', 'scroll', 'toggle'].concat(mediaEventTypes));\n\nfunction executeDispatch(event, listener, currentTarget) {\n  var type = event.type || 'unknown-event';\n  event.currentTarget = currentTarget;\n  invokeGuardedCallbackAndCatchFirstError(type, listener, undefined, event);\n  event.currentTarget = null;\n}\n\nfunction processDispatchQueueItemsInOrder(event, dispatchListeners, inCapturePhase) {\n  var previousInstance;\n\n  if (inCapturePhase) {\n    for (var i = dispatchListeners.length - 1; i >= 0; i--) {\n      var _dispatchListeners$i = dispatchListeners[i],\n          instance = _dispatchListeners$i.instance,\n          currentTarget = _dispatchListeners$i.currentTarget,\n          listener = _dispatchListeners$i.listener;\n\n      if (instance !== previousInstance && event.isPropagationStopped()) {\n        return;\n      }\n\n      executeDispatch(event, listener, currentTarget);\n      previousInstance = instance;\n    }\n  } else {\n    for (var _i = 0; _i < dispatchListeners.length; _i++) {\n      var _dispatchListeners$_i = dispatchListeners[_i],\n          _instance = _dispatchListeners$_i.instance,\n          _currentTarget = _dispatchListeners$_i.currentTarget,\n          _listener = _dispatchListeners$_i.listener;\n\n      if (_instance !== previousInstance && event.isPropagationStopped()) {\n        return;\n      }\n\n      executeDispatch(event, _listener, _currentTarget);\n      previousInstance = _instance;\n    }\n  }\n}\n\nfunction processDispatchQueue(dispatchQueue, eventSystemFlags) {\n  var inCapturePhase = (eventSystemFlags & IS_CAPTURE_PHASE) !== 0;\n\n  for (var i = 0; i < dispatchQueue.length; i++) {\n    var _dispatchQueue$i = dispatchQueue[i],\n        event = _dispatchQueue$i.event,\n        listeners = _dispatchQueue$i.listeners;\n    processDispatchQueueItemsInOrder(event, listeners, inCapturePhase); //  event system doesn't use pooling.\n  } // This would be a good time to rethrow if any of the event handlers threw.\n\n\n  rethrowCaughtError();\n}\n\nfunction dispatchEventsForPlugins(domEventName, eventSystemFlags, nativeEvent, targetInst, targetContainer) {\n  var nativeEventTarget = getEventTarget(nativeEvent);\n  var dispatchQueue = [];\n  extractEvents$5(dispatchQueue, domEventName, targetInst, nativeEvent, nativeEventTarget, eventSystemFlags);\n  processDispatchQueue(dispatchQueue, eventSystemFlags);\n}\n\nfunction listenToNonDelegatedEvent(domEventName, targetElement) {\n  var isCapturePhaseListener = false;\n  var listenerSet = getEventListenerSet(targetElement);\n  var listenerSetKey = getListenerSetKey(domEventName, isCapturePhaseListener);\n\n  if (!listenerSet.has(listenerSetKey)) {\n    addTrappedEventListener(targetElement, domEventName, IS_NON_DELEGATED, isCapturePhaseListener);\n    listenerSet.add(listenerSetKey);\n  }\n}\nvar listeningMarker = '_reactListening' + Math.random().toString(36).slice(2);\nfunction listenToAllSupportedEvents(rootContainerElement) {\n  {\n    if (rootContainerElement[listeningMarker]) {\n      // Performance optimization: don't iterate through events\n      // for the same portal container or root node more than once.\n      // TODO: once we remove the flag, we may be able to also\n      // remove some of the bookkeeping maps used for laziness.\n      return;\n    }\n\n    rootContainerElement[listeningMarker] = true;\n    allNativeEvents.forEach(function (domEventName) {\n      if (!nonDelegatedEvents.has(domEventName)) {\n        listenToNativeEvent(domEventName, false, rootContainerElement, null);\n      }\n\n      listenToNativeEvent(domEventName, true, rootContainerElement, null);\n    });\n  }\n}\nfunction listenToNativeEvent(domEventName, isCapturePhaseListener, rootContainerElement, targetElement) {\n  var eventSystemFlags = arguments.length > 4 && arguments[4] !== undefined ? arguments[4] : 0;\n  var target = rootContainerElement; // selectionchange needs to be attached to the document\n  // otherwise it won't capture incoming events that are only\n  // triggered on the document directly.\n\n  if (domEventName === 'selectionchange' && rootContainerElement.nodeType !== DOCUMENT_NODE) {\n    target = rootContainerElement.ownerDocument;\n  } // If the event can be delegated (or is capture phase), we can\n  // register it to the root container. Otherwise, we should\n  // register the event to the target element and mark it as\n  // a non-delegated event.\n\n\n  if (targetElement !== null && !isCapturePhaseListener && nonDelegatedEvents.has(domEventName)) {\n    // For all non-delegated events, apart from scroll, we attach\n    // their event listeners to the respective elements that their\n    // events fire on. That means we can skip this step, as event\n    // listener has already been added previously. However, we\n    // special case the scroll event because the reality is that any\n    // element can scroll.\n    // TODO: ideally, we'd eventually apply the same logic to all\n    // events from the nonDelegatedEvents list. Then we can remove\n    // this special case and use the same logic for all events.\n    if (domEventName !== 'scroll') {\n      return;\n    }\n\n    eventSystemFlags |= IS_NON_DELEGATED;\n    target = targetElement;\n  }\n\n  var listenerSet = getEventListenerSet(target);\n  var listenerSetKey = getListenerSetKey(domEventName, isCapturePhaseListener); // If the listener entry is empty or we should upgrade, then\n  // we need to trap an event listener onto the target.\n\n  if (!listenerSet.has(listenerSetKey)) {\n    if (isCapturePhaseListener) {\n      eventSystemFlags |= IS_CAPTURE_PHASE;\n    }\n\n    addTrappedEventListener(target, domEventName, eventSystemFlags, isCapturePhaseListener);\n    listenerSet.add(listenerSetKey);\n  }\n}\n\nfunction addTrappedEventListener(targetContainer, domEventName, eventSystemFlags, isCapturePhaseListener, isDeferredListenerForLegacyFBSupport) {\n  var listener = createEventListenerWrapperWithPriority(targetContainer, domEventName, eventSystemFlags); // If passive option is not supported, then the event will be\n  // active and not passive.\n\n  var isPassiveListener = undefined;\n\n  if (passiveBrowserEventsSupported) {\n    // Browsers introduced an intervention, making these events\n    // passive by default on document. React doesn't bind them\n    // to document anymore, but changing this now would undo\n    // the performance wins from the change. So we emulate\n    // the existing behavior manually on the roots now.\n    // https://github.com/facebook/react/issues/19651\n    if (domEventName === 'touchstart' || domEventName === 'touchmove' || domEventName === 'wheel') {\n      isPassiveListener = true;\n    }\n  }\n\n  targetContainer =  targetContainer;\n  var unsubscribeListener; // When legacyFBSupport is enabled, it's for when we\n\n\n  if (isCapturePhaseListener) {\n    if (isPassiveListener !== undefined) {\n      unsubscribeListener = addEventCaptureListenerWithPassiveFlag(targetContainer, domEventName, listener, isPassiveListener);\n    } else {\n      unsubscribeListener = addEventCaptureListener(targetContainer, domEventName, listener);\n    }\n  } else {\n    if (isPassiveListener !== undefined) {\n      unsubscribeListener = addEventBubbleListenerWithPassiveFlag(targetContainer, domEventName, listener, isPassiveListener);\n    } else {\n      unsubscribeListener = addEventBubbleListener(targetContainer, domEventName, listener);\n    }\n  }\n}\n\nfunction isMatchingRootContainer(grandContainer, targetContainer) {\n  return grandContainer === targetContainer || grandContainer.nodeType === COMMENT_NODE && grandContainer.parentNode === targetContainer;\n}\n\nfunction dispatchEventForPluginEventSystem(domEventName, eventSystemFlags, nativeEvent, targetInst, targetContainer) {\n  var ancestorInst = targetInst;\n\n  if ((eventSystemFlags & IS_EVENT_HANDLE_NON_MANAGED_NODE) === 0 && (eventSystemFlags & IS_NON_DELEGATED) === 0) {\n    var targetContainerNode = targetContainer; // If we are using the legacy FB support flag, we\n\n    if (targetInst !== null) {\n      // The below logic attempts to work out if we need to change\n      // the target fiber to a different ancestor. We had similar logic\n      // in the legacy event system, except the big difference between\n      // systems is that the modern event system now has an event listener\n      // attached to each React Root and React Portal Root. Together,\n      // the DOM nodes representing these roots are the \"rootContainer\".\n      // To figure out which ancestor instance we should use, we traverse\n      // up the fiber tree from the target instance and attempt to find\n      // root boundaries that match that of our current \"rootContainer\".\n      // If we find that \"rootContainer\", we find the parent fiber\n      // sub-tree for that root and make that our ancestor instance.\n      var node = targetInst;\n\n      mainLoop: while (true) {\n        if (node === null) {\n          return;\n        }\n\n        var nodeTag = node.tag;\n\n        if (nodeTag === HostRoot || nodeTag === HostPortal) {\n          var container = node.stateNode.containerInfo;\n\n          if (isMatchingRootContainer(container, targetContainerNode)) {\n            break;\n          }\n\n          if (nodeTag === HostPortal) {\n            // The target is a portal, but it's not the rootContainer we're looking for.\n            // Normally portals handle their own events all the way down to the root.\n            // So we should be able to stop now. However, we don't know if this portal\n            // was part of *our* root.\n            var grandNode = node.return;\n\n            while (grandNode !== null) {\n              var grandTag = grandNode.tag;\n\n              if (grandTag === HostRoot || grandTag === HostPortal) {\n                var grandContainer = grandNode.stateNode.containerInfo;\n\n                if (isMatchingRootContainer(grandContainer, targetContainerNode)) {\n                  // This is the rootContainer we're looking for and we found it as\n                  // a parent of the Portal. That means we can ignore it because the\n                  // Portal will bubble through to us.\n                  return;\n                }\n              }\n\n              grandNode = grandNode.return;\n            }\n          } // Now we need to find it's corresponding host fiber in the other\n          // tree. To do this we can use getClosestInstanceFromNode, but we\n          // need to validate that the fiber is a host instance, otherwise\n          // we need to traverse up through the DOM till we find the correct\n          // node that is from the other tree.\n\n\n          while (container !== null) {\n            var parentNode = getClosestInstanceFromNode(container);\n\n            if (parentNode === null) {\n              return;\n            }\n\n            var parentTag = parentNode.tag;\n\n            if (parentTag === HostComponent || parentTag === HostText) {\n              node = ancestorInst = parentNode;\n              continue mainLoop;\n            }\n\n            container = container.parentNode;\n          }\n        }\n\n        node = node.return;\n      }\n    }\n  }\n\n  batchedEventUpdates(function () {\n    return dispatchEventsForPlugins(domEventName, eventSystemFlags, nativeEvent, ancestorInst);\n  });\n}\n\nfunction createDispatchListener(instance, listener, currentTarget) {\n  return {\n    instance: instance,\n    listener: listener,\n    currentTarget: currentTarget\n  };\n}\n\nfunction accumulateSinglePhaseListeners(targetFiber, reactName, nativeEventType, inCapturePhase, accumulateTargetOnly) {\n  var captureName = reactName !== null ? reactName + 'Capture' : null;\n  var reactEventName = inCapturePhase ? captureName : reactName;\n  var listeners = [];\n  var instance = targetFiber;\n  var lastHostComponent = null; // Accumulate all instances and listeners via the target -> root path.\n\n  while (instance !== null) {\n    var _instance2 = instance,\n        stateNode = _instance2.stateNode,\n        tag = _instance2.tag; // Handle listeners that are on HostComponents (i.e. <div>)\n\n    if (tag === HostComponent && stateNode !== null) {\n      lastHostComponent = stateNode; // createEventHandle listeners\n\n\n      if (reactEventName !== null) {\n        var listener = getListener(instance, reactEventName);\n\n        if (listener != null) {\n          listeners.push(createDispatchListener(instance, listener, lastHostComponent));\n        }\n      }\n    } // If we are only accumulating events for the target, then we don't\n    // continue to propagate through the React fiber tree to find other\n    // listeners.\n\n\n    if (accumulateTargetOnly) {\n      break;\n    }\n\n    instance = instance.return;\n  }\n\n  return listeners;\n} // We should only use this function for:\n// - BeforeInputEventPlugin\n// - ChangeEventPlugin\n// - SelectEventPlugin\n// This is because we only process these plugins\n// in the bubble phase, so we need to accumulate two\n// phase event listeners (via emulation).\n\nfunction accumulateTwoPhaseListeners(targetFiber, reactName) {\n  var captureName = reactName + 'Capture';\n  var listeners = [];\n  var instance = targetFiber; // Accumulate all instances and listeners via the target -> root path.\n\n  while (instance !== null) {\n    var _instance3 = instance,\n        stateNode = _instance3.stateNode,\n        tag = _instance3.tag; // Handle listeners that are on HostComponents (i.e. <div>)\n\n    if (tag === HostComponent && stateNode !== null) {\n      var currentTarget = stateNode;\n      var captureListener = getListener(instance, captureName);\n\n      if (captureListener != null) {\n        listeners.unshift(createDispatchListener(instance, captureListener, currentTarget));\n      }\n\n      var bubbleListener = getListener(instance, reactName);\n\n      if (bubbleListener != null) {\n        listeners.push(createDispatchListener(instance, bubbleListener, currentTarget));\n      }\n    }\n\n    instance = instance.return;\n  }\n\n  return listeners;\n}\n\nfunction getParent(inst) {\n  if (inst === null) {\n    return null;\n  }\n\n  do {\n    inst = inst.return; // TODO: If this is a HostRoot we might want to bail out.\n    // That is depending on if we want nested subtrees (layers) to bubble\n    // events to their parent. We could also go through parentNode on the\n    // host node but that wouldn't work for React Native and doesn't let us\n    // do the portal feature.\n  } while (inst && inst.tag !== HostComponent);\n\n  if (inst) {\n    return inst;\n  }\n\n  return null;\n}\n/**\n * Return the lowest common ancestor of A and B, or null if they are in\n * different trees.\n */\n\n\nfunction getLowestCommonAncestor(instA, instB) {\n  var nodeA = instA;\n  var nodeB = instB;\n  var depthA = 0;\n\n  for (var tempA = nodeA; tempA; tempA = getParent(tempA)) {\n    depthA++;\n  }\n\n  var depthB = 0;\n\n  for (var tempB = nodeB; tempB; tempB = getParent(tempB)) {\n    depthB++;\n  } // If A is deeper, crawl up.\n\n\n  while (depthA - depthB > 0) {\n    nodeA = getParent(nodeA);\n    depthA--;\n  } // If B is deeper, crawl up.\n\n\n  while (depthB - depthA > 0) {\n    nodeB = getParent(nodeB);\n    depthB--;\n  } // Walk in lockstep until we find a match.\n\n\n  var depth = depthA;\n\n  while (depth--) {\n    if (nodeA === nodeB || nodeB !== null && nodeA === nodeB.alternate) {\n      return nodeA;\n    }\n\n    nodeA = getParent(nodeA);\n    nodeB = getParent(nodeB);\n  }\n\n  return null;\n}\n\nfunction accumulateEnterLeaveListenersForEvent(dispatchQueue, event, target, common, inCapturePhase) {\n  var registrationName = event._reactName;\n  var listeners = [];\n  var instance = target;\n\n  while (instance !== null) {\n    if (instance === common) {\n      break;\n    }\n\n    var _instance4 = instance,\n        alternate = _instance4.alternate,\n        stateNode = _instance4.stateNode,\n        tag = _instance4.tag;\n\n    if (alternate !== null && alternate === common) {\n      break;\n    }\n\n    if (tag === HostComponent && stateNode !== null) {\n      var currentTarget = stateNode;\n\n      if (inCapturePhase) {\n        var captureListener = getListener(instance, registrationName);\n\n        if (captureListener != null) {\n          listeners.unshift(createDispatchListener(instance, captureListener, currentTarget));\n        }\n      } else if (!inCapturePhase) {\n        var bubbleListener = getListener(instance, registrationName);\n\n        if (bubbleListener != null) {\n          listeners.push(createDispatchListener(instance, bubbleListener, currentTarget));\n        }\n      }\n    }\n\n    instance = instance.return;\n  }\n\n  if (listeners.length !== 0) {\n    dispatchQueue.push({\n      event: event,\n      listeners: listeners\n    });\n  }\n} // We should only use this function for:\n// - EnterLeaveEventPlugin\n// This is because we only process this plugin\n// in the bubble phase, so we need to accumulate two\n// phase event listeners.\n\n\nfunction accumulateEnterLeaveTwoPhaseListeners(dispatchQueue, leaveEvent, enterEvent, from, to) {\n  var common = from && to ? getLowestCommonAncestor(from, to) : null;\n\n  if (from !== null) {\n    accumulateEnterLeaveListenersForEvent(dispatchQueue, leaveEvent, from, common, false);\n  }\n\n  if (to !== null && enterEvent !== null) {\n    accumulateEnterLeaveListenersForEvent(dispatchQueue, enterEvent, to, common, true);\n  }\n}\nfunction getListenerSetKey(domEventName, capture) {\n  return domEventName + \"__\" + (capture ? 'capture' : 'bubble');\n}\n\nvar didWarnInvalidHydration = false;\nvar DANGEROUSLY_SET_INNER_HTML = 'dangerouslySetInnerHTML';\nvar SUPPRESS_CONTENT_EDITABLE_WARNING = 'suppressContentEditableWarning';\nvar SUPPRESS_HYDRATION_WARNING = 'suppressHydrationWarning';\nvar AUTOFOCUS = 'autoFocus';\nvar CHILDREN = 'children';\nvar STYLE = 'style';\nvar HTML$1 = '__html';\nvar HTML_NAMESPACE$1 = Namespaces.html;\nvar warnedUnknownTags;\nvar suppressHydrationWarning;\nvar validatePropertiesInDevelopment;\nvar warnForTextDifference;\nvar warnForPropDifference;\nvar warnForExtraAttributes;\nvar warnForInvalidEventListener;\nvar canDiffStyleForHydrationWarning;\nvar normalizeMarkupForTextOrAttribute;\nvar normalizeHTML;\n\n{\n  warnedUnknownTags = {\n    // There are working polyfills for <dialog>. Let people use it.\n    dialog: true,\n    // Electron ships a custom <webview> tag to display external web content in\n    // an isolated frame and process.\n    // This tag is not present in non Electron environments such as JSDom which\n    // is often used for testing purposes.\n    // @see https://electronjs.org/docs/api/webview-tag\n    webview: true\n  };\n\n  validatePropertiesInDevelopment = function (type, props) {\n    validateProperties(type, props);\n    validateProperties$1(type, props);\n    validateProperties$2(type, props, {\n      registrationNameDependencies: registrationNameDependencies,\n      possibleRegistrationNames: possibleRegistrationNames\n    });\n  }; // IE 11 parses & normalizes the style attribute as opposed to other\n  // browsers. It adds spaces and sorts the properties in some\n  // non-alphabetical order. Handling that would require sorting CSS\n  // properties in the client & server versions or applying\n  // `expectedStyle` to a temporary DOM node to read its `style` attribute\n  // normalized. Since it only affects IE, we're skipping style warnings\n  // in that browser completely in favor of doing all that work.\n  // See https://github.com/facebook/react/issues/11807\n\n\n  canDiffStyleForHydrationWarning = canUseDOM && !document.documentMode; // HTML parsing normalizes CR and CRLF to LF.\n  // It also can turn \\u0000 into \\uFFFD inside attributes.\n  // https://www.w3.org/TR/html5/single-page.html#preprocessing-the-input-stream\n  // If we have a mismatch, it might be caused by that.\n  // We will still patch up in this case but not fire the warning.\n\n  var NORMALIZE_NEWLINES_REGEX = /\\r\\n?/g;\n  var NORMALIZE_NULL_AND_REPLACEMENT_REGEX = /\\u0000|\\uFFFD/g;\n\n  normalizeMarkupForTextOrAttribute = function (markup) {\n    var markupString = typeof markup === 'string' ? markup : '' + markup;\n    return markupString.replace(NORMALIZE_NEWLINES_REGEX, '\\n').replace(NORMALIZE_NULL_AND_REPLACEMENT_REGEX, '');\n  };\n\n  warnForTextDifference = function (serverText, clientText) {\n    if (didWarnInvalidHydration) {\n      return;\n    }\n\n    var normalizedClientText = normalizeMarkupForTextOrAttribute(clientText);\n    var normalizedServerText = normalizeMarkupForTextOrAttribute(serverText);\n\n    if (normalizedServerText === normalizedClientText) {\n      return;\n    }\n\n    didWarnInvalidHydration = true;\n\n    error('Text content did not match. Server: \"%s\" Client: \"%s\"', normalizedServerText, normalizedClientText);\n  };\n\n  warnForPropDifference = function (propName, serverValue, clientValue) {\n    if (didWarnInvalidHydration) {\n      return;\n    }\n\n    var normalizedClientValue = normalizeMarkupForTextOrAttribute(clientValue);\n    var normalizedServerValue = normalizeMarkupForTextOrAttribute(serverValue);\n\n    if (normalizedServerValue === normalizedClientValue) {\n      return;\n    }\n\n    didWarnInvalidHydration = true;\n\n    error('Prop `%s` did not match. Server: %s Client: %s', propName, JSON.stringify(normalizedServerValue), JSON.stringify(normalizedClientValue));\n  };\n\n  warnForExtraAttributes = function (attributeNames) {\n    if (didWarnInvalidHydration) {\n      return;\n    }\n\n    didWarnInvalidHydration = true;\n    var names = [];\n    attributeNames.forEach(function (name) {\n      names.push(name);\n    });\n\n    error('Extra attributes from the server: %s', names);\n  };\n\n  warnForInvalidEventListener = function (registrationName, listener) {\n    if (listener === false) {\n      error('Expected `%s` listener to be a function, instead got `false`.\\n\\n' + 'If you used to conditionally omit it with %s={condition && value}, ' + 'pass %s={condition ? value : undefined} instead.', registrationName, registrationName, registrationName);\n    } else {\n      error('Expected `%s` listener to be a function, instead got a value of `%s` type.', registrationName, typeof listener);\n    }\n  }; // Parse the HTML and read it back to normalize the HTML string so that it\n  // can be used for comparison.\n\n\n  normalizeHTML = function (parent, html) {\n    // We could have created a separate document here to avoid\n    // re-initializing custom elements if they exist. But this breaks\n    // how <noscript> is being handled. So we use the same document.\n    // See the discussion in https://github.com/facebook/react/pull/11157.\n    var testElement = parent.namespaceURI === HTML_NAMESPACE$1 ? parent.ownerDocument.createElement(parent.tagName) : parent.ownerDocument.createElementNS(parent.namespaceURI, parent.tagName);\n    testElement.innerHTML = html;\n    return testElement.innerHTML;\n  };\n}\n\nfunction getOwnerDocumentFromRootContainer(rootContainerElement) {\n  return rootContainerElement.nodeType === DOCUMENT_NODE ? rootContainerElement : rootContainerElement.ownerDocument;\n}\n\nfunction noop() {}\n\nfunction trapClickOnNonInteractiveElement(node) {\n  // Mobile Safari does not fire properly bubble click events on\n  // non-interactive elements, which means delegated click listeners do not\n  // fire. The workaround for this bug involves attaching an empty click\n  // listener on the target node.\n  // https://www.quirksmode.org/blog/archives/2010/09/click_event_del.html\n  // Just set it using the onclick property so that we don't have to manage any\n  // bookkeeping for it. Not sure if we need to clear it when the listener is\n  // removed.\n  // TODO: Only do this for the relevant Safaris maybe?\n  node.onclick = noop;\n}\n\nfunction setInitialDOMProperties(tag, domElement, rootContainerElement, nextProps, isCustomComponentTag) {\n  for (var propKey in nextProps) {\n    if (!nextProps.hasOwnProperty(propKey)) {\n      continue;\n    }\n\n    var nextProp = nextProps[propKey];\n\n    if (propKey === STYLE) {\n      {\n        if (nextProp) {\n          // Freeze the next style object so that we can assume it won't be\n          // mutated. We have already warned for this in the past.\n          Object.freeze(nextProp);\n        }\n      } // Relies on `updateStylesByID` not mutating `styleUpdates`.\n\n\n      setValueForStyles(domElement, nextProp);\n    } else if (propKey === DANGEROUSLY_SET_INNER_HTML) {\n      var nextHtml = nextProp ? nextProp[HTML$1] : undefined;\n\n      if (nextHtml != null) {\n        setInnerHTML(domElement, nextHtml);\n      }\n    } else if (propKey === CHILDREN) {\n      if (typeof nextProp === 'string') {\n        // Avoid setting initial textContent when the text is empty. In IE11 setting\n        // textContent on a <textarea> will cause the placeholder to not\n        // show within the <textarea> until it has been focused and blurred again.\n        // https://github.com/facebook/react/issues/6731#issuecomment-254874553\n        var canSetTextContent = tag !== 'textarea' || nextProp !== '';\n\n        if (canSetTextContent) {\n          setTextContent(domElement, nextProp);\n        }\n      } else if (typeof nextProp === 'number') {\n        setTextContent(domElement, '' + nextProp);\n      }\n    } else if (propKey === SUPPRESS_CONTENT_EDITABLE_WARNING || propKey === SUPPRESS_HYDRATION_WARNING) ; else if (propKey === AUTOFOCUS) ; else if (registrationNameDependencies.hasOwnProperty(propKey)) {\n      if (nextProp != null) {\n        if ( typeof nextProp !== 'function') {\n          warnForInvalidEventListener(propKey, nextProp);\n        }\n\n        if (propKey === 'onScroll') {\n          listenToNonDelegatedEvent('scroll', domElement);\n        }\n      }\n    } else if (nextProp != null) {\n      setValueForProperty(domElement, propKey, nextProp, isCustomComponentTag);\n    }\n  }\n}\n\nfunction updateDOMProperties(domElement, updatePayload, wasCustomComponentTag, isCustomComponentTag) {\n  // TODO: Handle wasCustomComponentTag\n  for (var i = 0; i < updatePayload.length; i += 2) {\n    var propKey = updatePayload[i];\n    var propValue = updatePayload[i + 1];\n\n    if (propKey === STYLE) {\n      setValueForStyles(domElement, propValue);\n    } else if (propKey === DANGEROUSLY_SET_INNER_HTML) {\n      setInnerHTML(domElement, propValue);\n    } else if (propKey === CHILDREN) {\n      setTextContent(domElement, propValue);\n    } else {\n      setValueForProperty(domElement, propKey, propValue, isCustomComponentTag);\n    }\n  }\n}\n\nfunction createElement(type, props, rootContainerElement, parentNamespace) {\n  var isCustomComponentTag; // We create tags in the namespace of their parent container, except HTML\n  // tags get no namespace.\n\n  var ownerDocument = getOwnerDocumentFromRootContainer(rootContainerElement);\n  var domElement;\n  var namespaceURI = parentNamespace;\n\n  if (namespaceURI === HTML_NAMESPACE$1) {\n    namespaceURI = getIntrinsicNamespace(type);\n  }\n\n  if (namespaceURI === HTML_NAMESPACE$1) {\n    {\n      isCustomComponentTag = isCustomComponent(type, props); // Should this check be gated by parent namespace? Not sure we want to\n      // allow <SVG> or <mATH>.\n\n      if (!isCustomComponentTag && type !== type.toLowerCase()) {\n        error('<%s /> is using incorrect casing. ' + 'Use PascalCase for React components, ' + 'or lowercase for HTML elements.', type);\n      }\n    }\n\n    if (type === 'script') {\n      // Create the script via .innerHTML so its \"parser-inserted\" flag is\n      // set to true and it does not execute\n      var div = ownerDocument.createElement('div');\n\n      div.innerHTML = '<script><' + '/script>'; // eslint-disable-line\n      // This is guaranteed to yield a script element.\n\n      var firstChild = div.firstChild;\n      domElement = div.removeChild(firstChild);\n    } else if (typeof props.is === 'string') {\n      // $FlowIssue `createElement` should be updated for Web Components\n      domElement = ownerDocument.createElement(type, {\n        is: props.is\n      });\n    } else {\n      // Separate else branch instead of using `props.is || undefined` above because of a Firefox bug.\n      // See discussion in https://github.com/facebook/react/pull/6896\n      // and discussion in https://bugzilla.mozilla.org/show_bug.cgi?id=1276240\n      domElement = ownerDocument.createElement(type); // Normally attributes are assigned in `setInitialDOMProperties`, however the `multiple` and `size`\n      // attributes on `select`s needs to be added before `option`s are inserted.\n      // This prevents:\n      // - a bug where the `select` does not scroll to the correct option because singular\n      //  `select` elements automatically pick the first item #13222\n      // - a bug where the `select` set the first item as selected despite the `size` attribute #14239\n      // See https://github.com/facebook/react/issues/13222\n      // and https://github.com/facebook/react/issues/14239\n\n      if (type === 'select') {\n        var node = domElement;\n\n        if (props.multiple) {\n          node.multiple = true;\n        } else if (props.size) {\n          // Setting a size greater than 1 causes a select to behave like `multiple=true`, where\n          // it is possible that no option is selected.\n          //\n          // This is only necessary when a select in \"single selection mode\".\n          node.size = props.size;\n        }\n      }\n    }\n  } else {\n    domElement = ownerDocument.createElementNS(namespaceURI, type);\n  }\n\n  {\n    if (namespaceURI === HTML_NAMESPACE$1) {\n      if (!isCustomComponentTag && Object.prototype.toString.call(domElement) === '[object HTMLUnknownElement]' && !Object.prototype.hasOwnProperty.call(warnedUnknownTags, type)) {\n        warnedUnknownTags[type] = true;\n\n        error('The tag <%s> is unrecognized in this browser. ' + 'If you meant to render a React component, start its name with ' + 'an uppercase letter.', type);\n      }\n    }\n  }\n\n  return domElement;\n}\nfunction createTextNode(text, rootContainerElement) {\n  return getOwnerDocumentFromRootContainer(rootContainerElement).createTextNode(text);\n}\nfunction setInitialProperties(domElement, tag, rawProps, rootContainerElement) {\n  var isCustomComponentTag = isCustomComponent(tag, rawProps);\n\n  {\n    validatePropertiesInDevelopment(tag, rawProps);\n  } // TODO: Make sure that we check isMounted before firing any of these events.\n\n\n  var props;\n\n  switch (tag) {\n    case 'dialog':\n      listenToNonDelegatedEvent('cancel', domElement);\n      listenToNonDelegatedEvent('close', domElement);\n      props = rawProps;\n      break;\n\n    case 'iframe':\n    case 'object':\n    case 'embed':\n      // We listen to this event in case to ensure emulated bubble\n      // listeners still fire for the load event.\n      listenToNonDelegatedEvent('load', domElement);\n      props = rawProps;\n      break;\n\n    case 'video':\n    case 'audio':\n      // We listen to these events in case to ensure emulated bubble\n      // listeners still fire for all the media events.\n      for (var i = 0; i < mediaEventTypes.length; i++) {\n        listenToNonDelegatedEvent(mediaEventTypes[i], domElement);\n      }\n\n      props = rawProps;\n      break;\n\n    case 'source':\n      // We listen to this event in case to ensure emulated bubble\n      // listeners still fire for the error event.\n      listenToNonDelegatedEvent('error', domElement);\n      props = rawProps;\n      break;\n\n    case 'img':\n    case 'image':\n    case 'link':\n      // We listen to these events in case to ensure emulated bubble\n      // listeners still fire for error and load events.\n      listenToNonDelegatedEvent('error', domElement);\n      listenToNonDelegatedEvent('load', domElement);\n      props = rawProps;\n      break;\n\n    case 'details':\n      // We listen to this event in case to ensure emulated bubble\n      // listeners still fire for the toggle event.\n      listenToNonDelegatedEvent('toggle', domElement);\n      props = rawProps;\n      break;\n\n    case 'input':\n      initWrapperState(domElement, rawProps);\n      props = getHostProps(domElement, rawProps); // We listen to this event in case to ensure emulated bubble\n      // listeners still fire for the invalid event.\n\n      listenToNonDelegatedEvent('invalid', domElement);\n\n      break;\n\n    case 'option':\n      validateProps(domElement, rawProps);\n      props = getHostProps$1(domElement, rawProps);\n      break;\n\n    case 'select':\n      initWrapperState$1(domElement, rawProps);\n      props = getHostProps$2(domElement, rawProps); // We listen to this event in case to ensure emulated bubble\n      // listeners still fire for the invalid event.\n\n      listenToNonDelegatedEvent('invalid', domElement);\n\n      break;\n\n    case 'textarea':\n      initWrapperState$2(domElement, rawProps);\n      props = getHostProps$3(domElement, rawProps); // We listen to this event in case to ensure emulated bubble\n      // listeners still fire for the invalid event.\n\n      listenToNonDelegatedEvent('invalid', domElement);\n\n      break;\n\n    default:\n      props = rawProps;\n  }\n\n  assertValidProps(tag, props);\n  setInitialDOMProperties(tag, domElement, rootContainerElement, props, isCustomComponentTag);\n\n  switch (tag) {\n    case 'input':\n      // TODO: Make sure we check if this is still unmounted or do any clean\n      // up necessary since we never stop tracking anymore.\n      track(domElement);\n      postMountWrapper(domElement, rawProps, false);\n      break;\n\n    case 'textarea':\n      // TODO: Make sure we check if this is still unmounted or do any clean\n      // up necessary since we never stop tracking anymore.\n      track(domElement);\n      postMountWrapper$3(domElement);\n      break;\n\n    case 'option':\n      postMountWrapper$1(domElement, rawProps);\n      break;\n\n    case 'select':\n      postMountWrapper$2(domElement, rawProps);\n      break;\n\n    default:\n      if (typeof props.onClick === 'function') {\n        // TODO: This cast may not be sound for SVG, MathML or custom elements.\n        trapClickOnNonInteractiveElement(domElement);\n      }\n\n      break;\n  }\n} // Calculate the diff between the two objects.\n\nfunction diffProperties(domElement, tag, lastRawProps, nextRawProps, rootContainerElement) {\n  {\n    validatePropertiesInDevelopment(tag, nextRawProps);\n  }\n\n  var updatePayload = null;\n  var lastProps;\n  var nextProps;\n\n  switch (tag) {\n    case 'input':\n      lastProps = getHostProps(domElement, lastRawProps);\n      nextProps = getHostProps(domElement, nextRawProps);\n      updatePayload = [];\n      break;\n\n    case 'option':\n      lastProps = getHostProps$1(domElement, lastRawProps);\n      nextProps = getHostProps$1(domElement, nextRawProps);\n      updatePayload = [];\n      break;\n\n    case 'select':\n      lastProps = getHostProps$2(domElement, lastRawProps);\n      nextProps = getHostProps$2(domElement, nextRawProps);\n      updatePayload = [];\n      break;\n\n    case 'textarea':\n      lastProps = getHostProps$3(domElement, lastRawProps);\n      nextProps = getHostProps$3(domElement, nextRawProps);\n      updatePayload = [];\n      break;\n\n    default:\n      lastProps = lastRawProps;\n      nextProps = nextRawProps;\n\n      if (typeof lastProps.onClick !== 'function' && typeof nextProps.onClick === 'function') {\n        // TODO: This cast may not be sound for SVG, MathML or custom elements.\n        trapClickOnNonInteractiveElement(domElement);\n      }\n\n      break;\n  }\n\n  assertValidProps(tag, nextProps);\n  var propKey;\n  var styleName;\n  var styleUpdates = null;\n\n  for (propKey in lastProps) {\n    if (nextProps.hasOwnProperty(propKey) || !lastProps.hasOwnProperty(propKey) || lastProps[propKey] == null) {\n      continue;\n    }\n\n    if (propKey === STYLE) {\n      var lastStyle = lastProps[propKey];\n\n      for (styleName in lastStyle) {\n        if (lastStyle.hasOwnProperty(styleName)) {\n          if (!styleUpdates) {\n            styleUpdates = {};\n          }\n\n          styleUpdates[styleName] = '';\n        }\n      }\n    } else if (propKey === DANGEROUSLY_SET_INNER_HTML || propKey === CHILDREN) ; else if (propKey === SUPPRESS_CONTENT_EDITABLE_WARNING || propKey === SUPPRESS_HYDRATION_WARNING) ; else if (propKey === AUTOFOCUS) ; else if (registrationNameDependencies.hasOwnProperty(propKey)) {\n      // This is a special case. If any listener updates we need to ensure\n      // that the \"current\" fiber pointer gets updated so we need a commit\n      // to update this element.\n      if (!updatePayload) {\n        updatePayload = [];\n      }\n    } else {\n      // For all other deleted properties we add it to the queue. We use\n      // the allowed property list in the commit phase instead.\n      (updatePayload = updatePayload || []).push(propKey, null);\n    }\n  }\n\n  for (propKey in nextProps) {\n    var nextProp = nextProps[propKey];\n    var lastProp = lastProps != null ? lastProps[propKey] : undefined;\n\n    if (!nextProps.hasOwnProperty(propKey) || nextProp === lastProp || nextProp == null && lastProp == null) {\n      continue;\n    }\n\n    if (propKey === STYLE) {\n      {\n        if (nextProp) {\n          // Freeze the next style object so that we can assume it won't be\n          // mutated. We have already warned for this in the past.\n          Object.freeze(nextProp);\n        }\n      }\n\n      if (lastProp) {\n        // Unset styles on `lastProp` but not on `nextProp`.\n        for (styleName in lastProp) {\n          if (lastProp.hasOwnProperty(styleName) && (!nextProp || !nextProp.hasOwnProperty(styleName))) {\n            if (!styleUpdates) {\n              styleUpdates = {};\n            }\n\n            styleUpdates[styleName] = '';\n          }\n        } // Update styles that changed since `lastProp`.\n\n\n        for (styleName in nextProp) {\n          if (nextProp.hasOwnProperty(styleName) && lastProp[styleName] !== nextProp[styleName]) {\n            if (!styleUpdates) {\n              styleUpdates = {};\n            }\n\n            styleUpdates[styleName] = nextProp[styleName];\n          }\n        }\n      } else {\n        // Relies on `updateStylesByID` not mutating `styleUpdates`.\n        if (!styleUpdates) {\n          if (!updatePayload) {\n            updatePayload = [];\n          }\n\n          updatePayload.push(propKey, styleUpdates);\n        }\n\n        styleUpdates = nextProp;\n      }\n    } else if (propKey === DANGEROUSLY_SET_INNER_HTML) {\n      var nextHtml = nextProp ? nextProp[HTML$1] : undefined;\n      var lastHtml = lastProp ? lastProp[HTML$1] : undefined;\n\n      if (nextHtml != null) {\n        if (lastHtml !== nextHtml) {\n          (updatePayload = updatePayload || []).push(propKey, nextHtml);\n        }\n      }\n    } else if (propKey === CHILDREN) {\n      if (typeof nextProp === 'string' || typeof nextProp === 'number') {\n        (updatePayload = updatePayload || []).push(propKey, '' + nextProp);\n      }\n    } else if (propKey === SUPPRESS_CONTENT_EDITABLE_WARNING || propKey === SUPPRESS_HYDRATION_WARNING) ; else if (registrationNameDependencies.hasOwnProperty(propKey)) {\n      if (nextProp != null) {\n        // We eagerly listen to this even though we haven't committed yet.\n        if ( typeof nextProp !== 'function') {\n          warnForInvalidEventListener(propKey, nextProp);\n        }\n\n        if (propKey === 'onScroll') {\n          listenToNonDelegatedEvent('scroll', domElement);\n        }\n      }\n\n      if (!updatePayload && lastProp !== nextProp) {\n        // This is a special case. If any listener updates we need to ensure\n        // that the \"current\" props pointer gets updated so we need a commit\n        // to update this element.\n        updatePayload = [];\n      }\n    } else if (typeof nextProp === 'object' && nextProp !== null && nextProp.$$typeof === REACT_OPAQUE_ID_TYPE) {\n      // If we encounter useOpaqueReference's opaque object, this means we are hydrating.\n      // In this case, call the opaque object's toString function which generates a new client\n      // ID so client and server IDs match and throws to rerender.\n      nextProp.toString();\n    } else {\n      // For any other property we always add it to the queue and then we\n      // filter it out using the allowed property list during the commit.\n      (updatePayload = updatePayload || []).push(propKey, nextProp);\n    }\n  }\n\n  if (styleUpdates) {\n    {\n      validateShorthandPropertyCollisionInDev(styleUpdates, nextProps[STYLE]);\n    }\n\n    (updatePayload = updatePayload || []).push(STYLE, styleUpdates);\n  }\n\n  return updatePayload;\n} // Apply the diff.\n\nfunction updateProperties(domElement, updatePayload, tag, lastRawProps, nextRawProps) {\n  // Update checked *before* name.\n  // In the middle of an update, it is possible to have multiple checked.\n  // When a checked radio tries to change name, browser makes another radio's checked false.\n  if (tag === 'input' && nextRawProps.type === 'radio' && nextRawProps.name != null) {\n    updateChecked(domElement, nextRawProps);\n  }\n\n  var wasCustomComponentTag = isCustomComponent(tag, lastRawProps);\n  var isCustomComponentTag = isCustomComponent(tag, nextRawProps); // Apply the diff.\n\n  updateDOMProperties(domElement, updatePayload, wasCustomComponentTag, isCustomComponentTag); // TODO: Ensure that an update gets scheduled if any of the special props\n  // changed.\n\n  switch (tag) {\n    case 'input':\n      // Update the wrapper around inputs *after* updating props. This has to\n      // happen after `updateDOMProperties`. Otherwise HTML5 input validations\n      // raise warnings and prevent the new value from being assigned.\n      updateWrapper(domElement, nextRawProps);\n      break;\n\n    case 'textarea':\n      updateWrapper$1(domElement, nextRawProps);\n      break;\n\n    case 'select':\n      // <select> value update needs to occur after <option> children\n      // reconciliation\n      postUpdateWrapper(domElement, nextRawProps);\n      break;\n  }\n}\n\nfunction getPossibleStandardName(propName) {\n  {\n    var lowerCasedName = propName.toLowerCase();\n\n    if (!possibleStandardNames.hasOwnProperty(lowerCasedName)) {\n      return null;\n    }\n\n    return possibleStandardNames[lowerCasedName] || null;\n  }\n}\n\nfunction diffHydratedProperties(domElement, tag, rawProps, parentNamespace, rootContainerElement) {\n  var isCustomComponentTag;\n  var extraAttributeNames;\n\n  {\n    suppressHydrationWarning = rawProps[SUPPRESS_HYDRATION_WARNING] === true;\n    isCustomComponentTag = isCustomComponent(tag, rawProps);\n    validatePropertiesInDevelopment(tag, rawProps);\n  } // TODO: Make sure that we check isMounted before firing any of these events.\n\n\n  switch (tag) {\n    case 'dialog':\n      listenToNonDelegatedEvent('cancel', domElement);\n      listenToNonDelegatedEvent('close', domElement);\n      break;\n\n    case 'iframe':\n    case 'object':\n    case 'embed':\n      // We listen to this event in case to ensure emulated bubble\n      // listeners still fire for the load event.\n      listenToNonDelegatedEvent('load', domElement);\n      break;\n\n    case 'video':\n    case 'audio':\n      // We listen to these events in case to ensure emulated bubble\n      // listeners still fire for all the media events.\n      for (var i = 0; i < mediaEventTypes.length; i++) {\n        listenToNonDelegatedEvent(mediaEventTypes[i], domElement);\n      }\n\n      break;\n\n    case 'source':\n      // We listen to this event in case to ensure emulated bubble\n      // listeners still fire for the error event.\n      listenToNonDelegatedEvent('error', domElement);\n      break;\n\n    case 'img':\n    case 'image':\n    case 'link':\n      // We listen to these events in case to ensure emulated bubble\n      // listeners still fire for error and load events.\n      listenToNonDelegatedEvent('error', domElement);\n      listenToNonDelegatedEvent('load', domElement);\n      break;\n\n    case 'details':\n      // We listen to this event in case to ensure emulated bubble\n      // listeners still fire for the toggle event.\n      listenToNonDelegatedEvent('toggle', domElement);\n      break;\n\n    case 'input':\n      initWrapperState(domElement, rawProps); // We listen to this event in case to ensure emulated bubble\n      // listeners still fire for the invalid event.\n\n      listenToNonDelegatedEvent('invalid', domElement);\n\n      break;\n\n    case 'option':\n      validateProps(domElement, rawProps);\n      break;\n\n    case 'select':\n      initWrapperState$1(domElement, rawProps); // We listen to this event in case to ensure emulated bubble\n      // listeners still fire for the invalid event.\n\n      listenToNonDelegatedEvent('invalid', domElement);\n\n      break;\n\n    case 'textarea':\n      initWrapperState$2(domElement, rawProps); // We listen to this event in case to ensure emulated bubble\n      // listeners still fire for the invalid event.\n\n      listenToNonDelegatedEvent('invalid', domElement);\n\n      break;\n  }\n\n  assertValidProps(tag, rawProps);\n\n  {\n    extraAttributeNames = new Set();\n    var attributes = domElement.attributes;\n\n    for (var _i = 0; _i < attributes.length; _i++) {\n      var name = attributes[_i].name.toLowerCase();\n\n      switch (name) {\n        // Built-in SSR attribute is allowed\n        case 'data-reactroot':\n          break;\n        // Controlled attributes are not validated\n        // TODO: Only ignore them on controlled tags.\n\n        case 'value':\n          break;\n\n        case 'checked':\n          break;\n\n        case 'selected':\n          break;\n\n        default:\n          // Intentionally use the original name.\n          // See discussion in https://github.com/facebook/react/pull/10676.\n          extraAttributeNames.add(attributes[_i].name);\n      }\n    }\n  }\n\n  var updatePayload = null;\n\n  for (var propKey in rawProps) {\n    if (!rawProps.hasOwnProperty(propKey)) {\n      continue;\n    }\n\n    var nextProp = rawProps[propKey];\n\n    if (propKey === CHILDREN) {\n      // For text content children we compare against textContent. This\n      // might match additional HTML that is hidden when we read it using\n      // textContent. E.g. \"foo\" will match \"f<span>oo</span>\" but that still\n      // satisfies our requirement. Our requirement is not to produce perfect\n      // HTML and attributes. Ideally we should preserve structure but it's\n      // ok not to if the visible content is still enough to indicate what\n      // even listeners these nodes might be wired up to.\n      // TODO: Warn if there is more than a single textNode as a child.\n      // TODO: Should we use domElement.firstChild.nodeValue to compare?\n      if (typeof nextProp === 'string') {\n        if (domElement.textContent !== nextProp) {\n          if ( !suppressHydrationWarning) {\n            warnForTextDifference(domElement.textContent, nextProp);\n          }\n\n          updatePayload = [CHILDREN, nextProp];\n        }\n      } else if (typeof nextProp === 'number') {\n        if (domElement.textContent !== '' + nextProp) {\n          if ( !suppressHydrationWarning) {\n            warnForTextDifference(domElement.textContent, nextProp);\n          }\n\n          updatePayload = [CHILDREN, '' + nextProp];\n        }\n      }\n    } else if (registrationNameDependencies.hasOwnProperty(propKey)) {\n      if (nextProp != null) {\n        if ( typeof nextProp !== 'function') {\n          warnForInvalidEventListener(propKey, nextProp);\n        }\n\n        if (propKey === 'onScroll') {\n          listenToNonDelegatedEvent('scroll', domElement);\n        }\n      }\n    } else if ( // Convince Flow we've calculated it (it's DEV-only in this method.)\n    typeof isCustomComponentTag === 'boolean') {\n      // Validate that the properties correspond to their expected values.\n      var serverValue = void 0;\n      var propertyInfo = getPropertyInfo(propKey);\n\n      if (suppressHydrationWarning) ; else if (propKey === SUPPRESS_CONTENT_EDITABLE_WARNING || propKey === SUPPRESS_HYDRATION_WARNING || // Controlled attributes are not validated\n      // TODO: Only ignore them on controlled tags.\n      propKey === 'value' || propKey === 'checked' || propKey === 'selected') ; else if (propKey === DANGEROUSLY_SET_INNER_HTML) {\n        var serverHTML = domElement.innerHTML;\n        var nextHtml = nextProp ? nextProp[HTML$1] : undefined;\n\n        if (nextHtml != null) {\n          var expectedHTML = normalizeHTML(domElement, nextHtml);\n\n          if (expectedHTML !== serverHTML) {\n            warnForPropDifference(propKey, serverHTML, expectedHTML);\n          }\n        }\n      } else if (propKey === STYLE) {\n        // $FlowFixMe - Should be inferred as not undefined.\n        extraAttributeNames.delete(propKey);\n\n        if (canDiffStyleForHydrationWarning) {\n          var expectedStyle = createDangerousStringForStyles(nextProp);\n          serverValue = domElement.getAttribute('style');\n\n          if (expectedStyle !== serverValue) {\n            warnForPropDifference(propKey, serverValue, expectedStyle);\n          }\n        }\n      } else if (isCustomComponentTag) {\n        // $FlowFixMe - Should be inferred as not undefined.\n        extraAttributeNames.delete(propKey.toLowerCase());\n        serverValue = getValueForAttribute(domElement, propKey, nextProp);\n\n        if (nextProp !== serverValue) {\n          warnForPropDifference(propKey, serverValue, nextProp);\n        }\n      } else if (!shouldIgnoreAttribute(propKey, propertyInfo, isCustomComponentTag) && !shouldRemoveAttribute(propKey, nextProp, propertyInfo, isCustomComponentTag)) {\n        var isMismatchDueToBadCasing = false;\n\n        if (propertyInfo !== null) {\n          // $FlowFixMe - Should be inferred as not undefined.\n          extraAttributeNames.delete(propertyInfo.attributeName);\n          serverValue = getValueForProperty(domElement, propKey, nextProp, propertyInfo);\n        } else {\n          var ownNamespace = parentNamespace;\n\n          if (ownNamespace === HTML_NAMESPACE$1) {\n            ownNamespace = getIntrinsicNamespace(tag);\n          }\n\n          if (ownNamespace === HTML_NAMESPACE$1) {\n            // $FlowFixMe - Should be inferred as not undefined.\n            extraAttributeNames.delete(propKey.toLowerCase());\n          } else {\n            var standardName = getPossibleStandardName(propKey);\n\n            if (standardName !== null && standardName !== propKey) {\n              // If an SVG prop is supplied with bad casing, it will\n              // be successfully parsed from HTML, but will produce a mismatch\n              // (and would be incorrectly rendered on the client).\n              // However, we already warn about bad casing elsewhere.\n              // So we'll skip the misleading extra mismatch warning in this case.\n              isMismatchDueToBadCasing = true; // $FlowFixMe - Should be inferred as not undefined.\n\n              extraAttributeNames.delete(standardName);\n            } // $FlowFixMe - Should be inferred as not undefined.\n\n\n            extraAttributeNames.delete(propKey);\n          }\n\n          serverValue = getValueForAttribute(domElement, propKey, nextProp);\n        }\n\n        if (nextProp !== serverValue && !isMismatchDueToBadCasing) {\n          warnForPropDifference(propKey, serverValue, nextProp);\n        }\n      }\n    }\n  }\n\n  {\n    // $FlowFixMe - Should be inferred as not undefined.\n    if (extraAttributeNames.size > 0 && !suppressHydrationWarning) {\n      // $FlowFixMe - Should be inferred as not undefined.\n      warnForExtraAttributes(extraAttributeNames);\n    }\n  }\n\n  switch (tag) {\n    case 'input':\n      // TODO: Make sure we check if this is still unmounted or do any clean\n      // up necessary since we never stop tracking anymore.\n      track(domElement);\n      postMountWrapper(domElement, rawProps, true);\n      break;\n\n    case 'textarea':\n      // TODO: Make sure we check if this is still unmounted or do any clean\n      // up necessary since we never stop tracking anymore.\n      track(domElement);\n      postMountWrapper$3(domElement);\n      break;\n\n    case 'select':\n    case 'option':\n      // For input and textarea we current always set the value property at\n      // post mount to force it to diverge from attributes. However, for\n      // option and select we don't quite do the same thing and select\n      // is not resilient to the DOM state changing so we don't do that here.\n      // TODO: Consider not doing this for input and textarea.\n      break;\n\n    default:\n      if (typeof rawProps.onClick === 'function') {\n        // TODO: This cast may not be sound for SVG, MathML or custom elements.\n        trapClickOnNonInteractiveElement(domElement);\n      }\n\n      break;\n  }\n\n  return updatePayload;\n}\nfunction diffHydratedText(textNode, text) {\n  var isDifferent = textNode.nodeValue !== text;\n  return isDifferent;\n}\nfunction warnForUnmatchedText(textNode, text) {\n  {\n    warnForTextDifference(textNode.nodeValue, text);\n  }\n}\nfunction warnForDeletedHydratableElement(parentNode, child) {\n  {\n    if (didWarnInvalidHydration) {\n      return;\n    }\n\n    didWarnInvalidHydration = true;\n\n    error('Did not expect server HTML to contain a <%s> in <%s>.', child.nodeName.toLowerCase(), parentNode.nodeName.toLowerCase());\n  }\n}\nfunction warnForDeletedHydratableText(parentNode, child) {\n  {\n    if (didWarnInvalidHydration) {\n      return;\n    }\n\n    didWarnInvalidHydration = true;\n\n    error('Did not expect server HTML to contain the text node \"%s\" in <%s>.', child.nodeValue, parentNode.nodeName.toLowerCase());\n  }\n}\nfunction warnForInsertedHydratedElement(parentNode, tag, props) {\n  {\n    if (didWarnInvalidHydration) {\n      return;\n    }\n\n    didWarnInvalidHydration = true;\n\n    error('Expected server HTML to contain a matching <%s> in <%s>.', tag, parentNode.nodeName.toLowerCase());\n  }\n}\nfunction warnForInsertedHydratedText(parentNode, text) {\n  {\n    if (text === '') {\n      // We expect to insert empty text nodes since they're not represented in\n      // the HTML.\n      // TODO: Remove this special case if we can just avoid inserting empty\n      // text nodes.\n      return;\n    }\n\n    if (didWarnInvalidHydration) {\n      return;\n    }\n\n    didWarnInvalidHydration = true;\n\n    error('Expected server HTML to contain a matching text node for \"%s\" in <%s>.', text, parentNode.nodeName.toLowerCase());\n  }\n}\nfunction restoreControlledState$3(domElement, tag, props) {\n  switch (tag) {\n    case 'input':\n      restoreControlledState(domElement, props);\n      return;\n\n    case 'textarea':\n      restoreControlledState$2(domElement, props);\n      return;\n\n    case 'select':\n      restoreControlledState$1(domElement, props);\n      return;\n  }\n}\n\nvar validateDOMNesting = function () {};\n\nvar updatedAncestorInfo = function () {};\n\n{\n  // This validation code was written based on the HTML5 parsing spec:\n  // https://html.spec.whatwg.org/multipage/syntax.html#has-an-element-in-scope\n  //\n  // Note: this does not catch all invalid nesting, nor does it try to (as it's\n  // not clear what practical benefit doing so provides); instead, we warn only\n  // for cases where the parser will give a parse tree differing from what React\n  // intended. For example, <b><div></div></b> is invalid but we don't warn\n  // because it still parses correctly; we do warn for other cases like nested\n  // <p> tags where the beginning of the second element implicitly closes the\n  // first, causing a confusing mess.\n  // https://html.spec.whatwg.org/multipage/syntax.html#special\n  var specialTags = ['address', 'applet', 'area', 'article', 'aside', 'base', 'basefont', 'bgsound', 'blockquote', 'body', 'br', 'button', 'caption', 'center', 'col', 'colgroup', 'dd', 'details', 'dir', 'div', 'dl', 'dt', 'embed', 'fieldset', 'figcaption', 'figure', 'footer', 'form', 'frame', 'frameset', 'h1', 'h2', 'h3', 'h4', 'h5', 'h6', 'head', 'header', 'hgroup', 'hr', 'html', 'iframe', 'img', 'input', 'isindex', 'li', 'link', 'listing', 'main', 'marquee', 'menu', 'menuitem', 'meta', 'nav', 'noembed', 'noframes', 'noscript', 'object', 'ol', 'p', 'param', 'plaintext', 'pre', 'script', 'section', 'select', 'source', 'style', 'summary', 'table', 'tbody', 'td', 'template', 'textarea', 'tfoot', 'th', 'thead', 'title', 'tr', 'track', 'ul', 'wbr', 'xmp']; // https://html.spec.whatwg.org/multipage/syntax.html#has-an-element-in-scope\n\n  var inScopeTags = ['applet', 'caption', 'html', 'table', 'td', 'th', 'marquee', 'object', 'template', // https://html.spec.whatwg.org/multipage/syntax.html#html-integration-point\n  // TODO: Distinguish by namespace here -- for <title>, including it here\n  // errs on the side of fewer warnings\n  'foreignObject', 'desc', 'title']; // https://html.spec.whatwg.org/multipage/syntax.html#has-an-element-in-button-scope\n\n  var buttonScopeTags = inScopeTags.concat(['button']); // https://html.spec.whatwg.org/multipage/syntax.html#generate-implied-end-tags\n\n  var impliedEndTags = ['dd', 'dt', 'li', 'option', 'optgroup', 'p', 'rp', 'rt'];\n  var emptyAncestorInfo = {\n    current: null,\n    formTag: null,\n    aTagInScope: null,\n    buttonTagInScope: null,\n    nobrTagInScope: null,\n    pTagInButtonScope: null,\n    listItemTagAutoclosing: null,\n    dlItemTagAutoclosing: null\n  };\n\n  updatedAncestorInfo = function (oldInfo, tag) {\n    var ancestorInfo = _assign({}, oldInfo || emptyAncestorInfo);\n\n    var info = {\n      tag: tag\n    };\n\n    if (inScopeTags.indexOf(tag) !== -1) {\n      ancestorInfo.aTagInScope = null;\n      ancestorInfo.buttonTagInScope = null;\n      ancestorInfo.nobrTagInScope = null;\n    }\n\n    if (buttonScopeTags.indexOf(tag) !== -1) {\n      ancestorInfo.pTagInButtonScope = null;\n    } // See rules for 'li', 'dd', 'dt' start tags in\n    // https://html.spec.whatwg.org/multipage/syntax.html#parsing-main-inbody\n\n\n    if (specialTags.indexOf(tag) !== -1 && tag !== 'address' && tag !== 'div' && tag !== 'p') {\n      ancestorInfo.listItemTagAutoclosing = null;\n      ancestorInfo.dlItemTagAutoclosing = null;\n    }\n\n    ancestorInfo.current = info;\n\n    if (tag === 'form') {\n      ancestorInfo.formTag = info;\n    }\n\n    if (tag === 'a') {\n      ancestorInfo.aTagInScope = info;\n    }\n\n    if (tag === 'button') {\n      ancestorInfo.buttonTagInScope = info;\n    }\n\n    if (tag === 'nobr') {\n      ancestorInfo.nobrTagInScope = info;\n    }\n\n    if (tag === 'p') {\n      ancestorInfo.pTagInButtonScope = info;\n    }\n\n    if (tag === 'li') {\n      ancestorInfo.listItemTagAutoclosing = info;\n    }\n\n    if (tag === 'dd' || tag === 'dt') {\n      ancestorInfo.dlItemTagAutoclosing = info;\n    }\n\n    return ancestorInfo;\n  };\n  /**\n   * Returns whether\n   */\n\n\n  var isTagValidWithParent = function (tag, parentTag) {\n    // First, let's check if we're in an unusual parsing mode...\n    switch (parentTag) {\n      // https://html.spec.whatwg.org/multipage/syntax.html#parsing-main-inselect\n      case 'select':\n        return tag === 'option' || tag === 'optgroup' || tag === '#text';\n\n      case 'optgroup':\n        return tag === 'option' || tag === '#text';\n      // Strictly speaking, seeing an <option> doesn't mean we're in a <select>\n      // but\n\n      case 'option':\n        return tag === '#text';\n      // https://html.spec.whatwg.org/multipage/syntax.html#parsing-main-intd\n      // https://html.spec.whatwg.org/multipage/syntax.html#parsing-main-incaption\n      // No special behavior since these rules fall back to \"in body\" mode for\n      // all except special table nodes which cause bad parsing behavior anyway.\n      // https://html.spec.whatwg.org/multipage/syntax.html#parsing-main-intr\n\n      case 'tr':\n        return tag === 'th' || tag === 'td' || tag === 'style' || tag === 'script' || tag === 'template';\n      // https://html.spec.whatwg.org/multipage/syntax.html#parsing-main-intbody\n\n      case 'tbody':\n      case 'thead':\n      case 'tfoot':\n        return tag === 'tr' || tag === 'style' || tag === 'script' || tag === 'template';\n      // https://html.spec.whatwg.org/multipage/syntax.html#parsing-main-incolgroup\n\n      case 'colgroup':\n        return tag === 'col' || tag === 'template';\n      // https://html.spec.whatwg.org/multipage/syntax.html#parsing-main-intable\n\n      case 'table':\n        return tag === 'caption' || tag === 'colgroup' || tag === 'tbody' || tag === 'tfoot' || tag === 'thead' || tag === 'style' || tag === 'script' || tag === 'template';\n      // https://html.spec.whatwg.org/multipage/syntax.html#parsing-main-inhead\n\n      case 'head':\n        return tag === 'base' || tag === 'basefont' || tag === 'bgsound' || tag === 'link' || tag === 'meta' || tag === 'title' || tag === 'noscript' || tag === 'noframes' || tag === 'style' || tag === 'script' || tag === 'template';\n      // https://html.spec.whatwg.org/multipage/semantics.html#the-html-element\n\n      case 'html':\n        return tag === 'head' || tag === 'body' || tag === 'frameset';\n\n      case 'frameset':\n        return tag === 'frame';\n\n      case '#document':\n        return tag === 'html';\n    } // Probably in the \"in body\" parsing mode, so we outlaw only tag combos\n    // where the parsing rules cause implicit opens or closes to be added.\n    // https://html.spec.whatwg.org/multipage/syntax.html#parsing-main-inbody\n\n\n    switch (tag) {\n      case 'h1':\n      case 'h2':\n      case 'h3':\n      case 'h4':\n      case 'h5':\n      case 'h6':\n        return parentTag !== 'h1' && parentTag !== 'h2' && parentTag !== 'h3' && parentTag !== 'h4' && parentTag !== 'h5' && parentTag !== 'h6';\n\n      case 'rp':\n      case 'rt':\n        return impliedEndTags.indexOf(parentTag) === -1;\n\n      case 'body':\n      case 'caption':\n      case 'col':\n      case 'colgroup':\n      case 'frameset':\n      case 'frame':\n      case 'head':\n      case 'html':\n      case 'tbody':\n      case 'td':\n      case 'tfoot':\n      case 'th':\n      case 'thead':\n      case 'tr':\n        // These tags are only valid with a few parents that have special child\n        // parsing rules -- if we're down here, then none of those matched and\n        // so we allow it only if we don't know what the parent is, as all other\n        // cases are invalid.\n        return parentTag == null;\n    }\n\n    return true;\n  };\n  /**\n   * Returns whether\n   */\n\n\n  var findInvalidAncestorForTag = function (tag, ancestorInfo) {\n    switch (tag) {\n      case 'address':\n      case 'article':\n      case 'aside':\n      case 'blockquote':\n      case 'center':\n      case 'details':\n      case 'dialog':\n      case 'dir':\n      case 'div':\n      case 'dl':\n      case 'fieldset':\n      case 'figcaption':\n      case 'figure':\n      case 'footer':\n      case 'header':\n      case 'hgroup':\n      case 'main':\n      case 'menu':\n      case 'nav':\n      case 'ol':\n      case 'p':\n      case 'section':\n      case 'summary':\n      case 'ul':\n      case 'pre':\n      case 'listing':\n      case 'table':\n      case 'hr':\n      case 'xmp':\n      case 'h1':\n      case 'h2':\n      case 'h3':\n      case 'h4':\n      case 'h5':\n      case 'h6':\n        return ancestorInfo.pTagInButtonScope;\n\n      case 'form':\n        return ancestorInfo.formTag || ancestorInfo.pTagInButtonScope;\n\n      case 'li':\n        return ancestorInfo.listItemTagAutoclosing;\n\n      case 'dd':\n      case 'dt':\n        return ancestorInfo.dlItemTagAutoclosing;\n\n      case 'button':\n        return ancestorInfo.buttonTagInScope;\n\n      case 'a':\n        // Spec says something about storing a list of markers, but it sounds\n        // equivalent to this check.\n        return ancestorInfo.aTagInScope;\n\n      case 'nobr':\n        return ancestorInfo.nobrTagInScope;\n    }\n\n    return null;\n  };\n\n  var didWarn$1 = {};\n\n  validateDOMNesting = function (childTag, childText, ancestorInfo) {\n    ancestorInfo = ancestorInfo || emptyAncestorInfo;\n    var parentInfo = ancestorInfo.current;\n    var parentTag = parentInfo && parentInfo.tag;\n\n    if (childText != null) {\n      if (childTag != null) {\n        error('validateDOMNesting: when childText is passed, childTag should be null');\n      }\n\n      childTag = '#text';\n    }\n\n    var invalidParent = isTagValidWithParent(childTag, parentTag) ? null : parentInfo;\n    var invalidAncestor = invalidParent ? null : findInvalidAncestorForTag(childTag, ancestorInfo);\n    var invalidParentOrAncestor = invalidParent || invalidAncestor;\n\n    if (!invalidParentOrAncestor) {\n      return;\n    }\n\n    var ancestorTag = invalidParentOrAncestor.tag;\n    var warnKey = !!invalidParent + '|' + childTag + '|' + ancestorTag;\n\n    if (didWarn$1[warnKey]) {\n      return;\n    }\n\n    didWarn$1[warnKey] = true;\n    var tagDisplayName = childTag;\n    var whitespaceInfo = '';\n\n    if (childTag === '#text') {\n      if (/\\S/.test(childText)) {\n        tagDisplayName = 'Text nodes';\n      } else {\n        tagDisplayName = 'Whitespace text nodes';\n        whitespaceInfo = \" Make sure you don't have any extra whitespace between tags on \" + 'each line of your source code.';\n      }\n    } else {\n      tagDisplayName = '<' + childTag + '>';\n    }\n\n    if (invalidParent) {\n      var info = '';\n\n      if (ancestorTag === 'table' && childTag === 'tr') {\n        info += ' Add a <tbody>, <thead> or <tfoot> to your code to match the DOM tree generated by ' + 'the browser.';\n      }\n\n      error('validateDOMNesting(...): %s cannot appear as a child of <%s>.%s%s', tagDisplayName, ancestorTag, whitespaceInfo, info);\n    } else {\n      error('validateDOMNesting(...): %s cannot appear as a descendant of ' + '<%s>.', tagDisplayName, ancestorTag);\n    }\n  };\n}\n\nvar SUPPRESS_HYDRATION_WARNING$1;\n\n{\n  SUPPRESS_HYDRATION_WARNING$1 = 'suppressHydrationWarning';\n}\n\nvar SUSPENSE_START_DATA = '$';\nvar SUSPENSE_END_DATA = '/$';\nvar SUSPENSE_PENDING_START_DATA = '$?';\nvar SUSPENSE_FALLBACK_START_DATA = '$!';\nvar STYLE$1 = 'style';\nvar eventsEnabled = null;\nvar selectionInformation = null;\n\nfunction shouldAutoFocusHostComponent(type, props) {\n  switch (type) {\n    case 'button':\n    case 'input':\n    case 'select':\n    case 'textarea':\n      return !!props.autoFocus;\n  }\n\n  return false;\n}\nfunction getRootHostContext(rootContainerInstance) {\n  var type;\n  var namespace;\n  var nodeType = rootContainerInstance.nodeType;\n\n  switch (nodeType) {\n    case DOCUMENT_NODE:\n    case DOCUMENT_FRAGMENT_NODE:\n      {\n        type = nodeType === DOCUMENT_NODE ? '#document' : '#fragment';\n        var root = rootContainerInstance.documentElement;\n        namespace = root ? root.namespaceURI : getChildNamespace(null, '');\n        break;\n      }\n\n    default:\n      {\n        var container = nodeType === COMMENT_NODE ? rootContainerInstance.parentNode : rootContainerInstance;\n        var ownNamespace = container.namespaceURI || null;\n        type = container.tagName;\n        namespace = getChildNamespace(ownNamespace, type);\n        break;\n      }\n  }\n\n  {\n    var validatedTag = type.toLowerCase();\n    var ancestorInfo = updatedAncestorInfo(null, validatedTag);\n    return {\n      namespace: namespace,\n      ancestorInfo: ancestorInfo\n    };\n  }\n}\nfunction getChildHostContext(parentHostContext, type, rootContainerInstance) {\n  {\n    var parentHostContextDev = parentHostContext;\n    var namespace = getChildNamespace(parentHostContextDev.namespace, type);\n    var ancestorInfo = updatedAncestorInfo(parentHostContextDev.ancestorInfo, type);\n    return {\n      namespace: namespace,\n      ancestorInfo: ancestorInfo\n    };\n  }\n}\nfunction getPublicInstance(instance) {\n  return instance;\n}\nfunction prepareForCommit(containerInfo) {\n  eventsEnabled = isEnabled();\n  selectionInformation = getSelectionInformation();\n  var activeInstance = null;\n\n  setEnabled(false);\n  return activeInstance;\n}\nfunction resetAfterCommit(containerInfo) {\n  restoreSelection(selectionInformation);\n  setEnabled(eventsEnabled);\n  eventsEnabled = null;\n  selectionInformation = null;\n}\nfunction createInstance(type, props, rootContainerInstance, hostContext, internalInstanceHandle) {\n  var parentNamespace;\n\n  {\n    // TODO: take namespace into account when validating.\n    var hostContextDev = hostContext;\n    validateDOMNesting(type, null, hostContextDev.ancestorInfo);\n\n    if (typeof props.children === 'string' || typeof props.children === 'number') {\n      var string = '' + props.children;\n      var ownAncestorInfo = updatedAncestorInfo(hostContextDev.ancestorInfo, type);\n      validateDOMNesting(null, string, ownAncestorInfo);\n    }\n\n    parentNamespace = hostContextDev.namespace;\n  }\n\n  var domElement = createElement(type, props, rootContainerInstance, parentNamespace);\n  precacheFiberNode(internalInstanceHandle, domElement);\n  updateFiberProps(domElement, props);\n  return domElement;\n}\nfunction appendInitialChild(parentInstance, child) {\n  parentInstance.appendChild(child);\n}\nfunction finalizeInitialChildren(domElement, type, props, rootContainerInstance, hostContext) {\n  setInitialProperties(domElement, type, props, rootContainerInstance);\n  return shouldAutoFocusHostComponent(type, props);\n}\nfunction prepareUpdate(domElement, type, oldProps, newProps, rootContainerInstance, hostContext) {\n  {\n    var hostContextDev = hostContext;\n\n    if (typeof newProps.children !== typeof oldProps.children && (typeof newProps.children === 'string' || typeof newProps.children === 'number')) {\n      var string = '' + newProps.children;\n      var ownAncestorInfo = updatedAncestorInfo(hostContextDev.ancestorInfo, type);\n      validateDOMNesting(null, string, ownAncestorInfo);\n    }\n  }\n\n  return diffProperties(domElement, type, oldProps, newProps);\n}\nfunction shouldSetTextContent(type, props) {\n  return type === 'textarea' || type === 'option' || type === 'noscript' || typeof props.children === 'string' || typeof props.children === 'number' || typeof props.dangerouslySetInnerHTML === 'object' && props.dangerouslySetInnerHTML !== null && props.dangerouslySetInnerHTML.__html != null;\n}\nfunction createTextInstance(text, rootContainerInstance, hostContext, internalInstanceHandle) {\n  {\n    var hostContextDev = hostContext;\n    validateDOMNesting(null, text, hostContextDev.ancestorInfo);\n  }\n\n  var textNode = createTextNode(text, rootContainerInstance);\n  precacheFiberNode(internalInstanceHandle, textNode);\n  return textNode;\n}\n// if a component just imports ReactDOM (e.g. for findDOMNode).\n// Some environments might not have setTimeout or clearTimeout.\n\nvar scheduleTimeout = typeof setTimeout === 'function' ? setTimeout : undefined;\nvar cancelTimeout = typeof clearTimeout === 'function' ? clearTimeout : undefined;\nvar noTimeout = -1; // -------------------\nfunction commitMount(domElement, type, newProps, internalInstanceHandle) {\n  // Despite the naming that might imply otherwise, this method only\n  // fires if there is an `Update` effect scheduled during mounting.\n  // This happens if `finalizeInitialChildren` returns `true` (which it\n  // does to implement the `autoFocus` attribute on the client). But\n  // there are also other cases when this might happen (such as patching\n  // up text content during hydration mismatch). So we'll check this again.\n  if (shouldAutoFocusHostComponent(type, newProps)) {\n    domElement.focus();\n  }\n}\nfunction commitUpdate(domElement, updatePayload, type, oldProps, newProps, internalInstanceHandle) {\n  // Update the props handle so that we know which props are the ones with\n  // with current event handlers.\n  updateFiberProps(domElement, newProps); // Apply the diff to the DOM node.\n\n  updateProperties(domElement, updatePayload, type, oldProps, newProps);\n}\nfunction resetTextContent(domElement) {\n  setTextContent(domElement, '');\n}\nfunction commitTextUpdate(textInstance, oldText, newText) {\n  textInstance.nodeValue = newText;\n}\nfunction appendChild(parentInstance, child) {\n  parentInstance.appendChild(child);\n}\nfunction appendChildToContainer(container, child) {\n  var parentNode;\n\n  if (container.nodeType === COMMENT_NODE) {\n    parentNode = container.parentNode;\n    parentNode.insertBefore(child, container);\n  } else {\n    parentNode = container;\n    parentNode.appendChild(child);\n  } // This container might be used for a portal.\n  // If something inside a portal is clicked, that click should bubble\n  // through the React tree. However, on Mobile Safari the click would\n  // never bubble through the *DOM* tree unless an ancestor with onclick\n  // event exists. So we wouldn't see it and dispatch it.\n  // This is why we ensure that non React root containers have inline onclick\n  // defined.\n  // https://github.com/facebook/react/issues/11918\n\n\n  var reactRootContainer = container._reactRootContainer;\n\n  if ((reactRootContainer === null || reactRootContainer === undefined) && parentNode.onclick === null) {\n    // TODO: This cast may not be sound for SVG, MathML or custom elements.\n    trapClickOnNonInteractiveElement(parentNode);\n  }\n}\nfunction insertBefore(parentInstance, child, beforeChild) {\n  parentInstance.insertBefore(child, beforeChild);\n}\nfunction insertInContainerBefore(container, child, beforeChild) {\n  if (container.nodeType === COMMENT_NODE) {\n    container.parentNode.insertBefore(child, beforeChild);\n  } else {\n    container.insertBefore(child, beforeChild);\n  }\n}\n\nfunction removeChild(parentInstance, child) {\n  parentInstance.removeChild(child);\n}\nfunction removeChildFromContainer(container, child) {\n  if (container.nodeType === COMMENT_NODE) {\n    container.parentNode.removeChild(child);\n  } else {\n    container.removeChild(child);\n  }\n}\nfunction hideInstance(instance) {\n  // TODO: Does this work for all element types? What about MathML? Should we\n  // pass host context to this method?\n  instance = instance;\n  var style = instance.style;\n\n  if (typeof style.setProperty === 'function') {\n    style.setProperty('display', 'none', 'important');\n  } else {\n    style.display = 'none';\n  }\n}\nfunction hideTextInstance(textInstance) {\n  textInstance.nodeValue = '';\n}\nfunction unhideInstance(instance, props) {\n  instance = instance;\n  var styleProp = props[STYLE$1];\n  var display = styleProp !== undefined && styleProp !== null && styleProp.hasOwnProperty('display') ? styleProp.display : null;\n  instance.style.display = dangerousStyleValue('display', display);\n}\nfunction unhideTextInstance(textInstance, text) {\n  textInstance.nodeValue = text;\n}\nfunction clearContainer(container) {\n  if (container.nodeType === ELEMENT_NODE) {\n    container.textContent = '';\n  } else if (container.nodeType === DOCUMENT_NODE) {\n    var body = container.body;\n\n    if (body != null) {\n      body.textContent = '';\n    }\n  }\n} // -------------------\nfunction canHydrateInstance(instance, type, props) {\n  if (instance.nodeType !== ELEMENT_NODE || type.toLowerCase() !== instance.nodeName.toLowerCase()) {\n    return null;\n  } // This has now been refined to an element node.\n\n\n  return instance;\n}\nfunction canHydrateTextInstance(instance, text) {\n  if (text === '' || instance.nodeType !== TEXT_NODE) {\n    // Empty strings are not parsed by HTML so there won't be a correct match here.\n    return null;\n  } // This has now been refined to a text node.\n\n\n  return instance;\n}\nfunction isSuspenseInstancePending(instance) {\n  return instance.data === SUSPENSE_PENDING_START_DATA;\n}\nfunction isSuspenseInstanceFallback(instance) {\n  return instance.data === SUSPENSE_FALLBACK_START_DATA;\n}\n\nfunction getNextHydratable(node) {\n  // Skip non-hydratable nodes.\n  for (; node != null; node = node.nextSibling) {\n    var nodeType = node.nodeType;\n\n    if (nodeType === ELEMENT_NODE || nodeType === TEXT_NODE) {\n      break;\n    }\n  }\n\n  return node;\n}\n\nfunction getNextHydratableSibling(instance) {\n  return getNextHydratable(instance.nextSibling);\n}\nfunction getFirstHydratableChild(parentInstance) {\n  return getNextHydratable(parentInstance.firstChild);\n}\nfunction hydrateInstance(instance, type, props, rootContainerInstance, hostContext, internalInstanceHandle) {\n  precacheFiberNode(internalInstanceHandle, instance); // TODO: Possibly defer this until the commit phase where all the events\n  // get attached.\n\n  updateFiberProps(instance, props);\n  var parentNamespace;\n\n  {\n    var hostContextDev = hostContext;\n    parentNamespace = hostContextDev.namespace;\n  }\n\n  return diffHydratedProperties(instance, type, props, parentNamespace);\n}\nfunction hydrateTextInstance(textInstance, text, internalInstanceHandle) {\n  precacheFiberNode(internalInstanceHandle, textInstance);\n  return diffHydratedText(textInstance, text);\n}\nfunction getNextHydratableInstanceAfterSuspenseInstance(suspenseInstance) {\n  var node = suspenseInstance.nextSibling; // Skip past all nodes within this suspense boundary.\n  // There might be nested nodes so we need to keep track of how\n  // deep we are and only break out when we're back on top.\n\n  var depth = 0;\n\n  while (node) {\n    if (node.nodeType === COMMENT_NODE) {\n      var data = node.data;\n\n      if (data === SUSPENSE_END_DATA) {\n        if (depth === 0) {\n          return getNextHydratableSibling(node);\n        } else {\n          depth--;\n        }\n      } else if (data === SUSPENSE_START_DATA || data === SUSPENSE_FALLBACK_START_DATA || data === SUSPENSE_PENDING_START_DATA) {\n        depth++;\n      }\n    }\n\n    node = node.nextSibling;\n  } // TODO: Warn, we didn't find the end comment boundary.\n\n\n  return null;\n} // Returns the SuspenseInstance if this node is a direct child of a\n// SuspenseInstance. I.e. if its previous sibling is a Comment with\n// SUSPENSE_x_START_DATA. Otherwise, null.\n\nfunction getParentSuspenseInstance(targetInstance) {\n  var node = targetInstance.previousSibling; // Skip past all nodes within this suspense boundary.\n  // There might be nested nodes so we need to keep track of how\n  // deep we are and only break out when we're back on top.\n\n  var depth = 0;\n\n  while (node) {\n    if (node.nodeType === COMMENT_NODE) {\n      var data = node.data;\n\n      if (data === SUSPENSE_START_DATA || data === SUSPENSE_FALLBACK_START_DATA || data === SUSPENSE_PENDING_START_DATA) {\n        if (depth === 0) {\n          return node;\n        } else {\n          depth--;\n        }\n      } else if (data === SUSPENSE_END_DATA) {\n        depth++;\n      }\n    }\n\n    node = node.previousSibling;\n  }\n\n  return null;\n}\nfunction commitHydratedContainer(container) {\n  // Retry if any event replaying was blocked on this.\n  retryIfBlockedOn(container);\n}\nfunction commitHydratedSuspenseInstance(suspenseInstance) {\n  // Retry if any event replaying was blocked on this.\n  retryIfBlockedOn(suspenseInstance);\n}\nfunction didNotMatchHydratedContainerTextInstance(parentContainer, textInstance, text) {\n  {\n    warnForUnmatchedText(textInstance, text);\n  }\n}\nfunction didNotMatchHydratedTextInstance(parentType, parentProps, parentInstance, textInstance, text) {\n  if ( parentProps[SUPPRESS_HYDRATION_WARNING$1] !== true) {\n    warnForUnmatchedText(textInstance, text);\n  }\n}\nfunction didNotHydrateContainerInstance(parentContainer, instance) {\n  {\n    if (instance.nodeType === ELEMENT_NODE) {\n      warnForDeletedHydratableElement(parentContainer, instance);\n    } else if (instance.nodeType === COMMENT_NODE) ; else {\n      warnForDeletedHydratableText(parentContainer, instance);\n    }\n  }\n}\nfunction didNotHydrateInstance(parentType, parentProps, parentInstance, instance) {\n  if ( parentProps[SUPPRESS_HYDRATION_WARNING$1] !== true) {\n    if (instance.nodeType === ELEMENT_NODE) {\n      warnForDeletedHydratableElement(parentInstance, instance);\n    } else if (instance.nodeType === COMMENT_NODE) ; else {\n      warnForDeletedHydratableText(parentInstance, instance);\n    }\n  }\n}\nfunction didNotFindHydratableContainerInstance(parentContainer, type, props) {\n  {\n    warnForInsertedHydratedElement(parentContainer, type);\n  }\n}\nfunction didNotFindHydratableContainerTextInstance(parentContainer, text) {\n  {\n    warnForInsertedHydratedText(parentContainer, text);\n  }\n}\nfunction didNotFindHydratableInstance(parentType, parentProps, parentInstance, type, props) {\n  if ( parentProps[SUPPRESS_HYDRATION_WARNING$1] !== true) {\n    warnForInsertedHydratedElement(parentInstance, type);\n  }\n}\nfunction didNotFindHydratableTextInstance(parentType, parentProps, parentInstance, text) {\n  if ( parentProps[SUPPRESS_HYDRATION_WARNING$1] !== true) {\n    warnForInsertedHydratedText(parentInstance, text);\n  }\n}\nfunction didNotFindHydratableSuspenseInstance(parentType, parentProps, parentInstance) {\n  if ( parentProps[SUPPRESS_HYDRATION_WARNING$1] !== true) ;\n}\nvar clientId = 0;\nfunction makeClientIdInDEV(warnOnAccessInDEV) {\n  var id = 'r:' + (clientId++).toString(36);\n  return {\n    toString: function () {\n      warnOnAccessInDEV();\n      return id;\n    },\n    valueOf: function () {\n      warnOnAccessInDEV();\n      return id;\n    }\n  };\n}\nfunction isOpaqueHydratingObject(value) {\n  return value !== null && typeof value === 'object' && value.$$typeof === REACT_OPAQUE_ID_TYPE;\n}\nfunction makeOpaqueHydratingObject(attemptToReadValue) {\n  return {\n    $$typeof: REACT_OPAQUE_ID_TYPE,\n    toString: attemptToReadValue,\n    valueOf: attemptToReadValue\n  };\n}\nfunction preparePortalMount(portalInstance) {\n  {\n    listenToAllSupportedEvents(portalInstance);\n  }\n}\n\nvar randomKey = Math.random().toString(36).slice(2);\nvar internalInstanceKey = '__reactFiber$' + randomKey;\nvar internalPropsKey = '__reactProps$' + randomKey;\nvar internalContainerInstanceKey = '__reactContainer$' + randomKey;\nvar internalEventHandlersKey = '__reactEvents$' + randomKey;\nfunction precacheFiberNode(hostInst, node) {\n  node[internalInstanceKey] = hostInst;\n}\nfunction markContainerAsRoot(hostRoot, node) {\n  node[internalContainerInstanceKey] = hostRoot;\n}\nfunction unmarkContainerAsRoot(node) {\n  node[internalContainerInstanceKey] = null;\n}\nfunction isContainerMarkedAsRoot(node) {\n  return !!node[internalContainerInstanceKey];\n} // Given a DOM node, return the closest HostComponent or HostText fiber ancestor.\n// If the target node is part of a hydrated or not yet rendered subtree, then\n// this may also return a SuspenseComponent or HostRoot to indicate that.\n// Conceptually the HostRoot fiber is a child of the Container node. So if you\n// pass the Container node as the targetNode, you will not actually get the\n// HostRoot back. To get to the HostRoot, you need to pass a child of it.\n// The same thing applies to Suspense boundaries.\n\nfunction getClosestInstanceFromNode(targetNode) {\n  var targetInst = targetNode[internalInstanceKey];\n\n  if (targetInst) {\n    // Don't return HostRoot or SuspenseComponent here.\n    return targetInst;\n  } // If the direct event target isn't a React owned DOM node, we need to look\n  // to see if one of its parents is a React owned DOM node.\n\n\n  var parentNode = targetNode.parentNode;\n\n  while (parentNode) {\n    // We'll check if this is a container root that could include\n    // React nodes in the future. We need to check this first because\n    // if we're a child of a dehydrated container, we need to first\n    // find that inner container before moving on to finding the parent\n    // instance. Note that we don't check this field on  the targetNode\n    // itself because the fibers are conceptually between the container\n    // node and the first child. It isn't surrounding the container node.\n    // If it's not a container, we check if it's an instance.\n    targetInst = parentNode[internalContainerInstanceKey] || parentNode[internalInstanceKey];\n\n    if (targetInst) {\n      // Since this wasn't the direct target of the event, we might have\n      // stepped past dehydrated DOM nodes to get here. However they could\n      // also have been non-React nodes. We need to answer which one.\n      // If we the instance doesn't have any children, then there can't be\n      // a nested suspense boundary within it. So we can use this as a fast\n      // bailout. Most of the time, when people add non-React children to\n      // the tree, it is using a ref to a child-less DOM node.\n      // Normally we'd only need to check one of the fibers because if it\n      // has ever gone from having children to deleting them or vice versa\n      // it would have deleted the dehydrated boundary nested inside already.\n      // However, since the HostRoot starts out with an alternate it might\n      // have one on the alternate so we need to check in case this was a\n      // root.\n      var alternate = targetInst.alternate;\n\n      if (targetInst.child !== null || alternate !== null && alternate.child !== null) {\n        // Next we need to figure out if the node that skipped past is\n        // nested within a dehydrated boundary and if so, which one.\n        var suspenseInstance = getParentSuspenseInstance(targetNode);\n\n        while (suspenseInstance !== null) {\n          // We found a suspense instance. That means that we haven't\n          // hydrated it yet. Even though we leave the comments in the\n          // DOM after hydrating, and there are boundaries in the DOM\n          // that could already be hydrated, we wouldn't have found them\n          // through this pass since if the target is hydrated it would\n          // have had an internalInstanceKey on it.\n          // Let's get the fiber associated with the SuspenseComponent\n          // as the deepest instance.\n          var targetSuspenseInst = suspenseInstance[internalInstanceKey];\n\n          if (targetSuspenseInst) {\n            return targetSuspenseInst;\n          } // If we don't find a Fiber on the comment, it might be because\n          // we haven't gotten to hydrate it yet. There might still be a\n          // parent boundary that hasn't above this one so we need to find\n          // the outer most that is known.\n\n\n          suspenseInstance = getParentSuspenseInstance(suspenseInstance); // If we don't find one, then that should mean that the parent\n          // host component also hasn't hydrated yet. We can return it\n          // below since it will bail out on the isMounted check later.\n        }\n      }\n\n      return targetInst;\n    }\n\n    targetNode = parentNode;\n    parentNode = targetNode.parentNode;\n  }\n\n  return null;\n}\n/**\n * Given a DOM node, return the ReactDOMComponent or ReactDOMTextComponent\n * instance, or null if the node was not rendered by this React.\n */\n\nfunction getInstanceFromNode(node) {\n  var inst = node[internalInstanceKey] || node[internalContainerInstanceKey];\n\n  if (inst) {\n    if (inst.tag === HostComponent || inst.tag === HostText || inst.tag === SuspenseComponent || inst.tag === HostRoot) {\n      return inst;\n    } else {\n      return null;\n    }\n  }\n\n  return null;\n}\n/**\n * Given a ReactDOMComponent or ReactDOMTextComponent, return the corresponding\n * DOM node.\n */\n\nfunction getNodeFromInstance(inst) {\n  if (inst.tag === HostComponent || inst.tag === HostText) {\n    // In Fiber this, is just the state node right now. We assume it will be\n    // a host component or host text.\n    return inst.stateNode;\n  } // Without this first invariant, passing a non-DOM-component triggers the next\n  // invariant for a missing parent, which is super confusing.\n\n\n  {\n    {\n      throw Error( \"getNodeFromInstance: Invalid argument.\" );\n    }\n  }\n}\nfunction getFiberCurrentPropsFromNode(node) {\n  return node[internalPropsKey] || null;\n}\nfunction updateFiberProps(node, props) {\n  node[internalPropsKey] = props;\n}\nfunction getEventListenerSet(node) {\n  var elementListenerSet = node[internalEventHandlersKey];\n\n  if (elementListenerSet === undefined) {\n    elementListenerSet = node[internalEventHandlersKey] = new Set();\n  }\n\n  return elementListenerSet;\n}\n\nvar loggedTypeFailures = {};\nvar ReactDebugCurrentFrame$1 = ReactSharedInternals.ReactDebugCurrentFrame;\n\nfunction setCurrentlyValidatingElement(element) {\n  {\n    if (element) {\n      var owner = element._owner;\n      var stack = describeUnknownElementTypeFrameInDEV(element.type, element._source, owner ? owner.type : null);\n      ReactDebugCurrentFrame$1.setExtraStackFrame(stack);\n    } else {\n      ReactDebugCurrentFrame$1.setExtraStackFrame(null);\n    }\n  }\n}\n\nfunction checkPropTypes(typeSpecs, values, location, componentName, element) {\n  {\n    // $FlowFixMe This is okay but Flow doesn't know it.\n    var has = Function.call.bind(Object.prototype.hasOwnProperty);\n\n    for (var typeSpecName in typeSpecs) {\n      if (has(typeSpecs, typeSpecName)) {\n        var error$1 = void 0; // Prop type validation may throw. In case they do, we don't want to\n        // fail the render phase where it didn't fail before. So we log it.\n        // After these have been cleaned up, we'll let them throw.\n\n        try {\n          // This is intentionally an invariant that gets caught. It's the same\n          // behavior as without this statement except with a better message.\n          if (typeof typeSpecs[typeSpecName] !== 'function') {\n            var err = Error((componentName || 'React class') + ': ' + location + ' type `' + typeSpecName + '` is invalid; ' + 'it must be a function, usually from the `prop-types` package, but received `' + typeof typeSpecs[typeSpecName] + '`.' + 'This often happens because of typos such as `PropTypes.function` instead of `PropTypes.func`.');\n            err.name = 'Invariant Violation';\n            throw err;\n          }\n\n          error$1 = typeSpecs[typeSpecName](values, typeSpecName, componentName, location, null, 'SECRET_DO_NOT_PASS_THIS_OR_YOU_WILL_BE_FIRED');\n        } catch (ex) {\n          error$1 = ex;\n        }\n\n        if (error$1 && !(error$1 instanceof Error)) {\n          setCurrentlyValidatingElement(element);\n\n          error('%s: type specification of %s' + ' `%s` is invalid; the type checker ' + 'function must return `null` or an `Error` but returned a %s. ' + 'You may have forgotten to pass an argument to the type checker ' + 'creator (arrayOf, instanceOf, objectOf, oneOf, oneOfType, and ' + 'shape all require an argument).', componentName || 'React class', location, typeSpecName, typeof error$1);\n\n          setCurrentlyValidatingElement(null);\n        }\n\n        if (error$1 instanceof Error && !(error$1.message in loggedTypeFailures)) {\n          // Only monitor this failure once because there tends to be a lot of the\n          // same error.\n          loggedTypeFailures[error$1.message] = true;\n          setCurrentlyValidatingElement(element);\n\n          error('Failed %s type: %s', location, error$1.message);\n\n          setCurrentlyValidatingElement(null);\n        }\n      }\n    }\n  }\n}\n\nvar valueStack = [];\nvar fiberStack;\n\n{\n  fiberStack = [];\n}\n\nvar index = -1;\n\nfunction createCursor(defaultValue) {\n  return {\n    current: defaultValue\n  };\n}\n\nfunction pop(cursor, fiber) {\n  if (index < 0) {\n    {\n      error('Unexpected pop.');\n    }\n\n    return;\n  }\n\n  {\n    if (fiber !== fiberStack[index]) {\n      error('Unexpected Fiber popped.');\n    }\n  }\n\n  cursor.current = valueStack[index];\n  valueStack[index] = null;\n\n  {\n    fiberStack[index] = null;\n  }\n\n  index--;\n}\n\nfunction push(cursor, value, fiber) {\n  index++;\n  valueStack[index] = cursor.current;\n\n  {\n    fiberStack[index] = fiber;\n  }\n\n  cursor.current = value;\n}\n\nvar warnedAboutMissingGetChildContext;\n\n{\n  warnedAboutMissingGetChildContext = {};\n}\n\nvar emptyContextObject = {};\n\n{\n  Object.freeze(emptyContextObject);\n} // A cursor to the current merged context object on the stack.\n\n\nvar contextStackCursor = createCursor(emptyContextObject); // A cursor to a boolean indicating whether the context has changed.\n\nvar didPerformWorkStackCursor = createCursor(false); // Keep track of the previous context object that was on the stack.\n// We use this to get access to the parent context after we have already\n// pushed the next context provider, and now need to merge their contexts.\n\nvar previousContext = emptyContextObject;\n\nfunction getUnmaskedContext(workInProgress, Component, didPushOwnContextIfProvider) {\n  {\n    if (didPushOwnContextIfProvider && isContextProvider(Component)) {\n      // If the fiber is a context provider itself, when we read its context\n      // we may have already pushed its own child context on the stack. A context\n      // provider should not \"see\" its own child context. Therefore we read the\n      // previous (parent) context instead for a context provider.\n      return previousContext;\n    }\n\n    return contextStackCursor.current;\n  }\n}\n\nfunction cacheContext(workInProgress, unmaskedContext, maskedContext) {\n  {\n    var instance = workInProgress.stateNode;\n    instance.__reactInternalMemoizedUnmaskedChildContext = unmaskedContext;\n    instance.__reactInternalMemoizedMaskedChildContext = maskedContext;\n  }\n}\n\nfunction getMaskedContext(workInProgress, unmaskedContext) {\n  {\n    var type = workInProgress.type;\n    var contextTypes = type.contextTypes;\n\n    if (!contextTypes) {\n      return emptyContextObject;\n    } // Avoid recreating masked context unless unmasked context has changed.\n    // Failing to do this will result in unnecessary calls to componentWillReceiveProps.\n    // This may trigger infinite loops if componentWillReceiveProps calls setState.\n\n\n    var instance = workInProgress.stateNode;\n\n    if (instance && instance.__reactInternalMemoizedUnmaskedChildContext === unmaskedContext) {\n      return instance.__reactInternalMemoizedMaskedChildContext;\n    }\n\n    var context = {};\n\n    for (var key in contextTypes) {\n      context[key] = unmaskedContext[key];\n    }\n\n    {\n      var name = getComponentName(type) || 'Unknown';\n      checkPropTypes(contextTypes, context, 'context', name);\n    } // Cache unmasked context so we can avoid recreating masked context unless necessary.\n    // Context is created before the class component is instantiated so check for instance.\n\n\n    if (instance) {\n      cacheContext(workInProgress, unmaskedContext, context);\n    }\n\n    return context;\n  }\n}\n\nfunction hasContextChanged() {\n  {\n    return didPerformWorkStackCursor.current;\n  }\n}\n\nfunction isContextProvider(type) {\n  {\n    var childContextTypes = type.childContextTypes;\n    return childContextTypes !== null && childContextTypes !== undefined;\n  }\n}\n\nfunction popContext(fiber) {\n  {\n    pop(didPerformWorkStackCursor, fiber);\n    pop(contextStackCursor, fiber);\n  }\n}\n\nfunction popTopLevelContextObject(fiber) {\n  {\n    pop(didPerformWorkStackCursor, fiber);\n    pop(contextStackCursor, fiber);\n  }\n}\n\nfunction pushTopLevelContextObject(fiber, context, didChange) {\n  {\n    if (!(contextStackCursor.current === emptyContextObject)) {\n      {\n        throw Error( \"Unexpected context found on stack. This error is likely caused by a bug in React. Please file an issue.\" );\n      }\n    }\n\n    push(contextStackCursor, context, fiber);\n    push(didPerformWorkStackCursor, didChange, fiber);\n  }\n}\n\nfunction processChildContext(fiber, type, parentContext) {\n  {\n    var instance = fiber.stateNode;\n    var childContextTypes = type.childContextTypes; // TODO (bvaughn) Replace this behavior with an invariant() in the future.\n    // It has only been added in Fiber to match the (unintentional) behavior in Stack.\n\n    if (typeof instance.getChildContext !== 'function') {\n      {\n        var componentName = getComponentName(type) || 'Unknown';\n\n        if (!warnedAboutMissingGetChildContext[componentName]) {\n          warnedAboutMissingGetChildContext[componentName] = true;\n\n          error('%s.childContextTypes is specified but there is no getChildContext() method ' + 'on the instance. You can either define getChildContext() on %s or remove ' + 'childContextTypes from it.', componentName, componentName);\n        }\n      }\n\n      return parentContext;\n    }\n\n    var childContext = instance.getChildContext();\n\n    for (var contextKey in childContext) {\n      if (!(contextKey in childContextTypes)) {\n        {\n          throw Error( (getComponentName(type) || 'Unknown') + \".getChildContext(): key \\\"\" + contextKey + \"\\\" is not defined in childContextTypes.\" );\n        }\n      }\n    }\n\n    {\n      var name = getComponentName(type) || 'Unknown';\n      checkPropTypes(childContextTypes, childContext, 'child context', name);\n    }\n\n    return _assign({}, parentContext, childContext);\n  }\n}\n\nfunction pushContextProvider(workInProgress) {\n  {\n    var instance = workInProgress.stateNode; // We push the context as early as possible to ensure stack integrity.\n    // If the instance does not exist yet, we will push null at first,\n    // and replace it on the stack later when invalidating the context.\n\n    var memoizedMergedChildContext = instance && instance.__reactInternalMemoizedMergedChildContext || emptyContextObject; // Remember the parent context so we can merge with it later.\n    // Inherit the parent's did-perform-work value to avoid inadvertently blocking updates.\n\n    previousContext = contextStackCursor.current;\n    push(contextStackCursor, memoizedMergedChildContext, workInProgress);\n    push(didPerformWorkStackCursor, didPerformWorkStackCursor.current, workInProgress);\n    return true;\n  }\n}\n\nfunction invalidateContextProvider(workInProgress, type, didChange) {\n  {\n    var instance = workInProgress.stateNode;\n\n    if (!instance) {\n      {\n        throw Error( \"Expected to have an instance by this point. This error is likely caused by a bug in React. Please file an issue.\" );\n      }\n    }\n\n    if (didChange) {\n      // Merge parent and own context.\n      // Skip this if we're not updating due to sCU.\n      // This avoids unnecessarily recomputing memoized values.\n      var mergedContext = processChildContext(workInProgress, type, previousContext);\n      instance.__reactInternalMemoizedMergedChildContext = mergedContext; // Replace the old (or empty) context with the new one.\n      // It is important to unwind the context in the reverse order.\n\n      pop(didPerformWorkStackCursor, workInProgress);\n      pop(contextStackCursor, workInProgress); // Now push the new context and mark that it has changed.\n\n      push(contextStackCursor, mergedContext, workInProgress);\n      push(didPerformWorkStackCursor, didChange, workInProgress);\n    } else {\n      pop(didPerformWorkStackCursor, workInProgress);\n      push(didPerformWorkStackCursor, didChange, workInProgress);\n    }\n  }\n}\n\nfunction findCurrentUnmaskedContext(fiber) {\n  {\n    // Currently this is only used with renderSubtreeIntoContainer; not sure if it\n    // makes sense elsewhere\n    if (!(isFiberMounted(fiber) && fiber.tag === ClassComponent)) {\n      {\n        throw Error( \"Expected subtree parent to be a mounted class component. This error is likely caused by a bug in React. Please file an issue.\" );\n      }\n    }\n\n    var node = fiber;\n\n    do {\n      switch (node.tag) {\n        case HostRoot:\n          return node.stateNode.context;\n\n        case ClassComponent:\n          {\n            var Component = node.type;\n\n            if (isContextProvider(Component)) {\n              return node.stateNode.__reactInternalMemoizedMergedChildContext;\n            }\n\n            break;\n          }\n      }\n\n      node = node.return;\n    } while (node !== null);\n\n    {\n      {\n        throw Error( \"Found unexpected detached subtree parent. This error is likely caused by a bug in React. Please file an issue.\" );\n      }\n    }\n  }\n}\n\nvar LegacyRoot = 0;\nvar BlockingRoot = 1;\nvar ConcurrentRoot = 2;\n\nvar rendererID = null;\nvar injectedHook = null;\nvar hasLoggedError = false;\nvar isDevToolsPresent = typeof __REACT_DEVTOOLS_GLOBAL_HOOK__ !== 'undefined';\nfunction injectInternals(internals) {\n  if (typeof __REACT_DEVTOOLS_GLOBAL_HOOK__ === 'undefined') {\n    // No DevTools\n    return false;\n  }\n\n  var hook = __REACT_DEVTOOLS_GLOBAL_HOOK__;\n\n  if (hook.isDisabled) {\n    // This isn't a real property on the hook, but it can be set to opt out\n    // of DevTools integration and associated warnings and logs.\n    // https://github.com/facebook/react/issues/3877\n    return true;\n  }\n\n  if (!hook.supportsFiber) {\n    {\n      error('The installed version of React DevTools is too old and will not work ' + 'with the current version of React. Please update React DevTools. ' + 'https://reactjs.org/link/react-devtools');\n    } // DevTools exists, even though it doesn't support Fiber.\n\n\n    return true;\n  }\n\n  try {\n    rendererID = hook.inject(internals); // We have successfully injected, so now it is safe to set up hooks.\n\n    injectedHook = hook;\n  } catch (err) {\n    // Catch all errors because it is unsafe to throw during initialization.\n    {\n      error('React instrumentation encountered an error: %s.', err);\n    }\n  } // DevTools exists\n\n\n  return true;\n}\nfunction onScheduleRoot(root, children) {\n  {\n    if (injectedHook && typeof injectedHook.onScheduleFiberRoot === 'function') {\n      try {\n        injectedHook.onScheduleFiberRoot(rendererID, root, children);\n      } catch (err) {\n        if ( !hasLoggedError) {\n          hasLoggedError = true;\n\n          error('React instrumentation encountered an error: %s', err);\n        }\n      }\n    }\n  }\n}\nfunction onCommitRoot(root, priorityLevel) {\n  if (injectedHook && typeof injectedHook.onCommitFiberRoot === 'function') {\n    try {\n      var didError = (root.current.flags & DidCapture) === DidCapture;\n\n      if (enableProfilerTimer) {\n        injectedHook.onCommitFiberRoot(rendererID, root, priorityLevel, didError);\n      } else {\n        injectedHook.onCommitFiberRoot(rendererID, root, undefined, didError);\n      }\n    } catch (err) {\n      {\n        if (!hasLoggedError) {\n          hasLoggedError = true;\n\n          error('React instrumentation encountered an error: %s', err);\n        }\n      }\n    }\n  }\n}\nfunction onCommitUnmount(fiber) {\n  if (injectedHook && typeof injectedHook.onCommitFiberUnmount === 'function') {\n    try {\n      injectedHook.onCommitFiberUnmount(rendererID, fiber);\n    } catch (err) {\n      {\n        if (!hasLoggedError) {\n          hasLoggedError = true;\n\n          error('React instrumentation encountered an error: %s', err);\n        }\n      }\n    }\n  }\n}\n\nvar Scheduler_runWithPriority = Scheduler.unstable_runWithPriority,\n    Scheduler_scheduleCallback = Scheduler.unstable_scheduleCallback,\n    Scheduler_cancelCallback = Scheduler.unstable_cancelCallback,\n    Scheduler_shouldYield = Scheduler.unstable_shouldYield,\n    Scheduler_requestPaint = Scheduler.unstable_requestPaint,\n    Scheduler_now$1 = Scheduler.unstable_now,\n    Scheduler_getCurrentPriorityLevel = Scheduler.unstable_getCurrentPriorityLevel,\n    Scheduler_ImmediatePriority = Scheduler.unstable_ImmediatePriority,\n    Scheduler_UserBlockingPriority = Scheduler.unstable_UserBlockingPriority,\n    Scheduler_NormalPriority = Scheduler.unstable_NormalPriority,\n    Scheduler_LowPriority = Scheduler.unstable_LowPriority,\n    Scheduler_IdlePriority = Scheduler.unstable_IdlePriority;\n\n{\n  // Provide explicit error message when production+profiling bundle of e.g.\n  // react-dom is used with production (non-profiling) bundle of\n  // scheduler/tracing\n  if (!(tracing.__interactionsRef != null && tracing.__interactionsRef.current != null)) {\n    {\n      throw Error( \"It is not supported to run the profiling version of a renderer (for example, `react-dom/profiling`) without also replacing the `scheduler/tracing` module with `scheduler/tracing-profiling`. Your bundler might have a setting for aliasing both modules. Learn more at https://reactjs.org/link/profiling\" );\n    }\n  }\n}\n\nvar fakeCallbackNode = {}; // Except for NoPriority, these correspond to Scheduler priorities. We use\n// ascending numbers so we can compare them like numbers. They start at 90 to\n// avoid clashing with Scheduler's priorities.\n\nvar ImmediatePriority$1 = 99;\nvar UserBlockingPriority$2 = 98;\nvar NormalPriority$1 = 97;\nvar LowPriority$1 = 96;\nvar IdlePriority$1 = 95; // NoPriority is the absence of priority. Also React-only.\n\nvar NoPriority$1 = 90;\nvar shouldYield = Scheduler_shouldYield;\nvar requestPaint = // Fall back gracefully if we're running an older version of Scheduler.\nScheduler_requestPaint !== undefined ? Scheduler_requestPaint : function () {};\nvar syncQueue = null;\nvar immediateQueueCallbackNode = null;\nvar isFlushingSyncQueue = false;\nvar initialTimeMs$1 = Scheduler_now$1(); // If the initial timestamp is reasonably small, use Scheduler's `now` directly.\n// This will be the case for modern browsers that support `performance.now`. In\n// older browsers, Scheduler falls back to `Date.now`, which returns a Unix\n// timestamp. In that case, subtract the module initialization time to simulate\n// the behavior of performance.now and keep our times small enough to fit\n// within 32 bits.\n// TODO: Consider lifting this into Scheduler.\n\nvar now = initialTimeMs$1 < 10000 ? Scheduler_now$1 : function () {\n  return Scheduler_now$1() - initialTimeMs$1;\n};\nfunction getCurrentPriorityLevel() {\n  switch (Scheduler_getCurrentPriorityLevel()) {\n    case Scheduler_ImmediatePriority:\n      return ImmediatePriority$1;\n\n    case Scheduler_UserBlockingPriority:\n      return UserBlockingPriority$2;\n\n    case Scheduler_NormalPriority:\n      return NormalPriority$1;\n\n    case Scheduler_LowPriority:\n      return LowPriority$1;\n\n    case Scheduler_IdlePriority:\n      return IdlePriority$1;\n\n    default:\n      {\n        {\n          throw Error( \"Unknown priority level.\" );\n        }\n      }\n\n  }\n}\n\nfunction reactPriorityToSchedulerPriority(reactPriorityLevel) {\n  switch (reactPriorityLevel) {\n    case ImmediatePriority$1:\n      return Scheduler_ImmediatePriority;\n\n    case UserBlockingPriority$2:\n      return Scheduler_UserBlockingPriority;\n\n    case NormalPriority$1:\n      return Scheduler_NormalPriority;\n\n    case LowPriority$1:\n      return Scheduler_LowPriority;\n\n    case IdlePriority$1:\n      return Scheduler_IdlePriority;\n\n    default:\n      {\n        {\n          throw Error( \"Unknown priority level.\" );\n        }\n      }\n\n  }\n}\n\nfunction runWithPriority$1(reactPriorityLevel, fn) {\n  var priorityLevel = reactPriorityToSchedulerPriority(reactPriorityLevel);\n  return Scheduler_runWithPriority(priorityLevel, fn);\n}\nfunction scheduleCallback(reactPriorityLevel, callback, options) {\n  var priorityLevel = reactPriorityToSchedulerPriority(reactPriorityLevel);\n  return Scheduler_scheduleCallback(priorityLevel, callback, options);\n}\nfunction scheduleSyncCallback(callback) {\n  // Push this callback into an internal queue. We'll flush these either in\n  // the next tick, or earlier if something calls `flushSyncCallbackQueue`.\n  if (syncQueue === null) {\n    syncQueue = [callback]; // Flush the queue in the next tick, at the earliest.\n\n    immediateQueueCallbackNode = Scheduler_scheduleCallback(Scheduler_ImmediatePriority, flushSyncCallbackQueueImpl);\n  } else {\n    // Push onto existing queue. Don't need to schedule a callback because\n    // we already scheduled one when we created the queue.\n    syncQueue.push(callback);\n  }\n\n  return fakeCallbackNode;\n}\nfunction cancelCallback(callbackNode) {\n  if (callbackNode !== fakeCallbackNode) {\n    Scheduler_cancelCallback(callbackNode);\n  }\n}\nfunction flushSyncCallbackQueue() {\n  if (immediateQueueCallbackNode !== null) {\n    var node = immediateQueueCallbackNode;\n    immediateQueueCallbackNode = null;\n    Scheduler_cancelCallback(node);\n  }\n\n  flushSyncCallbackQueueImpl();\n}\n\nfunction flushSyncCallbackQueueImpl() {\n  if (!isFlushingSyncQueue && syncQueue !== null) {\n    // Prevent re-entrancy.\n    isFlushingSyncQueue = true;\n    var i = 0;\n\n    {\n      try {\n        var _isSync2 = true;\n        var _queue = syncQueue;\n        runWithPriority$1(ImmediatePriority$1, function () {\n          for (; i < _queue.length; i++) {\n            var callback = _queue[i];\n\n            do {\n              callback = callback(_isSync2);\n            } while (callback !== null);\n          }\n        });\n        syncQueue = null;\n      } catch (error) {\n        // If something throws, leave the remaining callbacks on the queue.\n        if (syncQueue !== null) {\n          syncQueue = syncQueue.slice(i + 1);\n        } // Resume flushing in the next tick\n\n\n        Scheduler_scheduleCallback(Scheduler_ImmediatePriority, flushSyncCallbackQueue);\n        throw error;\n      } finally {\n        isFlushingSyncQueue = false;\n      }\n    }\n  }\n}\n\n// TODO: this is special because it gets imported during build.\nvar ReactVersion = '17.0.2';\n\nvar NoMode = 0;\nvar StrictMode = 1; // TODO: Remove BlockingMode and ConcurrentMode by reading from the root\n// tag instead\n\nvar BlockingMode = 2;\nvar ConcurrentMode = 4;\nvar ProfileMode = 8;\nvar DebugTracingMode = 16;\n\nvar ReactCurrentBatchConfig = ReactSharedInternals.ReactCurrentBatchConfig;\nvar NoTransition = 0;\nfunction requestCurrentTransition() {\n  return ReactCurrentBatchConfig.transition;\n}\n\nvar ReactStrictModeWarnings = {\n  recordUnsafeLifecycleWarnings: function (fiber, instance) {},\n  flushPendingUnsafeLifecycleWarnings: function () {},\n  recordLegacyContextWarning: function (fiber, instance) {},\n  flushLegacyContextWarning: function () {},\n  discardPendingWarnings: function () {}\n};\n\n{\n  var findStrictRoot = function (fiber) {\n    var maybeStrictRoot = null;\n    var node = fiber;\n\n    while (node !== null) {\n      if (node.mode & StrictMode) {\n        maybeStrictRoot = node;\n      }\n\n      node = node.return;\n    }\n\n    return maybeStrictRoot;\n  };\n\n  var setToSortedString = function (set) {\n    var array = [];\n    set.forEach(function (value) {\n      array.push(value);\n    });\n    return array.sort().join(', ');\n  };\n\n  var pendingComponentWillMountWarnings = [];\n  var pendingUNSAFE_ComponentWillMountWarnings = [];\n  var pendingComponentWillReceivePropsWarnings = [];\n  var pendingUNSAFE_ComponentWillReceivePropsWarnings = [];\n  var pendingComponentWillUpdateWarnings = [];\n  var pendingUNSAFE_ComponentWillUpdateWarnings = []; // Tracks components we have already warned about.\n\n  var didWarnAboutUnsafeLifecycles = new Set();\n\n  ReactStrictModeWarnings.recordUnsafeLifecycleWarnings = function (fiber, instance) {\n    // Dedup strategy: Warn once per component.\n    if (didWarnAboutUnsafeLifecycles.has(fiber.type)) {\n      return;\n    }\n\n    if (typeof instance.componentWillMount === 'function' && // Don't warn about react-lifecycles-compat polyfilled components.\n    instance.componentWillMount.__suppressDeprecationWarning !== true) {\n      pendingComponentWillMountWarnings.push(fiber);\n    }\n\n    if (fiber.mode & StrictMode && typeof instance.UNSAFE_componentWillMount === 'function') {\n      pendingUNSAFE_ComponentWillMountWarnings.push(fiber);\n    }\n\n    if (typeof instance.componentWillReceiveProps === 'function' && instance.componentWillReceiveProps.__suppressDeprecationWarning !== true) {\n      pendingComponentWillReceivePropsWarnings.push(fiber);\n    }\n\n    if (fiber.mode & StrictMode && typeof instance.UNSAFE_componentWillReceiveProps === 'function') {\n      pendingUNSAFE_ComponentWillReceivePropsWarnings.push(fiber);\n    }\n\n    if (typeof instance.componentWillUpdate === 'function' && instance.componentWillUpdate.__suppressDeprecationWarning !== true) {\n      pendingComponentWillUpdateWarnings.push(fiber);\n    }\n\n    if (fiber.mode & StrictMode && typeof instance.UNSAFE_componentWillUpdate === 'function') {\n      pendingUNSAFE_ComponentWillUpdateWarnings.push(fiber);\n    }\n  };\n\n  ReactStrictModeWarnings.flushPendingUnsafeLifecycleWarnings = function () {\n    // We do an initial pass to gather component names\n    var componentWillMountUniqueNames = new Set();\n\n    if (pendingComponentWillMountWarnings.length > 0) {\n      pendingComponentWillMountWarnings.forEach(function (fiber) {\n        componentWillMountUniqueNames.add(getComponentName(fiber.type) || 'Component');\n        didWarnAboutUnsafeLifecycles.add(fiber.type);\n      });\n      pendingComponentWillMountWarnings = [];\n    }\n\n    var UNSAFE_componentWillMountUniqueNames = new Set();\n\n    if (pendingUNSAFE_ComponentWillMountWarnings.length > 0) {\n      pendingUNSAFE_ComponentWillMountWarnings.forEach(function (fiber) {\n        UNSAFE_componentWillMountUniqueNames.add(getComponentName(fiber.type) || 'Component');\n        didWarnAboutUnsafeLifecycles.add(fiber.type);\n      });\n      pendingUNSAFE_ComponentWillMountWarnings = [];\n    }\n\n    var componentWillReceivePropsUniqueNames = new Set();\n\n    if (pendingComponentWillReceivePropsWarnings.length > 0) {\n      pendingComponentWillReceivePropsWarnings.forEach(function (fiber) {\n        componentWillReceivePropsUniqueNames.add(getComponentName(fiber.type) || 'Component');\n        didWarnAboutUnsafeLifecycles.add(fiber.type);\n      });\n      pendingComponentWillReceivePropsWarnings = [];\n    }\n\n    var UNSAFE_componentWillReceivePropsUniqueNames = new Set();\n\n    if (pendingUNSAFE_ComponentWillReceivePropsWarnings.length > 0) {\n      pendingUNSAFE_ComponentWillReceivePropsWarnings.forEach(function (fiber) {\n        UNSAFE_componentWillReceivePropsUniqueNames.add(getComponentName(fiber.type) || 'Component');\n        didWarnAboutUnsafeLifecycles.add(fiber.type);\n      });\n      pendingUNSAFE_ComponentWillReceivePropsWarnings = [];\n    }\n\n    var componentWillUpdateUniqueNames = new Set();\n\n    if (pendingComponentWillUpdateWarnings.length > 0) {\n      pendingComponentWillUpdateWarnings.forEach(function (fiber) {\n        componentWillUpdateUniqueNames.add(getComponentName(fiber.type) || 'Component');\n        didWarnAboutUnsafeLifecycles.add(fiber.type);\n      });\n      pendingComponentWillUpdateWarnings = [];\n    }\n\n    var UNSAFE_componentWillUpdateUniqueNames = new Set();\n\n    if (pendingUNSAFE_ComponentWillUpdateWarnings.length > 0) {\n      pendingUNSAFE_ComponentWillUpdateWarnings.forEach(function (fiber) {\n        UNSAFE_componentWillUpdateUniqueNames.add(getComponentName(fiber.type) || 'Component');\n        didWarnAboutUnsafeLifecycles.add(fiber.type);\n      });\n      pendingUNSAFE_ComponentWillUpdateWarnings = [];\n    } // Finally, we flush all the warnings\n    // UNSAFE_ ones before the deprecated ones, since they'll be 'louder'\n\n\n    if (UNSAFE_componentWillMountUniqueNames.size > 0) {\n      var sortedNames = setToSortedString(UNSAFE_componentWillMountUniqueNames);\n\n      error('Using UNSAFE_componentWillMount in strict mode is not recommended and may indicate bugs in your code. ' + 'See https://reactjs.org/link/unsafe-component-lifecycles for details.\\n\\n' + '* Move code with side effects to componentDidMount, and set initial state in the constructor.\\n' + '\\nPlease update the following components: %s', sortedNames);\n    }\n\n    if (UNSAFE_componentWillReceivePropsUniqueNames.size > 0) {\n      var _sortedNames = setToSortedString(UNSAFE_componentWillReceivePropsUniqueNames);\n\n      error('Using UNSAFE_componentWillReceiveProps in strict mode is not recommended ' + 'and may indicate bugs in your code. ' + 'See https://reactjs.org/link/unsafe-component-lifecycles for details.\\n\\n' + '* Move data fetching code or side effects to componentDidUpdate.\\n' + \"* If you're updating state whenever props change, \" + 'refactor your code to use memoization techniques or move it to ' + 'static getDerivedStateFromProps. Learn more at: https://reactjs.org/link/derived-state\\n' + '\\nPlease update the following components: %s', _sortedNames);\n    }\n\n    if (UNSAFE_componentWillUpdateUniqueNames.size > 0) {\n      var _sortedNames2 = setToSortedString(UNSAFE_componentWillUpdateUniqueNames);\n\n      error('Using UNSAFE_componentWillUpdate in strict mode is not recommended ' + 'and may indicate bugs in your code. ' + 'See https://reactjs.org/link/unsafe-component-lifecycles for details.\\n\\n' + '* Move data fetching code or side effects to componentDidUpdate.\\n' + '\\nPlease update the following components: %s', _sortedNames2);\n    }\n\n    if (componentWillMountUniqueNames.size > 0) {\n      var _sortedNames3 = setToSortedString(componentWillMountUniqueNames);\n\n      warn('componentWillMount has been renamed, and is not recommended for use. ' + 'See https://reactjs.org/link/unsafe-component-lifecycles for details.\\n\\n' + '* Move code with side effects to componentDidMount, and set initial state in the constructor.\\n' + '* Rename componentWillMount to UNSAFE_componentWillMount to suppress ' + 'this warning in non-strict mode. In React 18.x, only the UNSAFE_ name will work. ' + 'To rename all deprecated lifecycles to their new names, you can run ' + '`npx react-codemod rename-unsafe-lifecycles` in your project source folder.\\n' + '\\nPlease update the following components: %s', _sortedNames3);\n    }\n\n    if (componentWillReceivePropsUniqueNames.size > 0) {\n      var _sortedNames4 = setToSortedString(componentWillReceivePropsUniqueNames);\n\n      warn('componentWillReceiveProps has been renamed, and is not recommended for use. ' + 'See https://reactjs.org/link/unsafe-component-lifecycles for details.\\n\\n' + '* Move data fetching code or side effects to componentDidUpdate.\\n' + \"* If you're updating state whenever props change, refactor your \" + 'code to use memoization techniques or move it to ' + 'static getDerivedStateFromProps. Learn more at: https://reactjs.org/link/derived-state\\n' + '* Rename componentWillReceiveProps to UNSAFE_componentWillReceiveProps to suppress ' + 'this warning in non-strict mode. In React 18.x, only the UNSAFE_ name will work. ' + 'To rename all deprecated lifecycles to their new names, you can run ' + '`npx react-codemod rename-unsafe-lifecycles` in your project source folder.\\n' + '\\nPlease update the following components: %s', _sortedNames4);\n    }\n\n    if (componentWillUpdateUniqueNames.size > 0) {\n      var _sortedNames5 = setToSortedString(componentWillUpdateUniqueNames);\n\n      warn('componentWillUpdate has been renamed, and is not recommended for use. ' + 'See https://reactjs.org/link/unsafe-component-lifecycles for details.\\n\\n' + '* Move data fetching code or side effects to componentDidUpdate.\\n' + '* Rename componentWillUpdate to UNSAFE_componentWillUpdate to suppress ' + 'this warning in non-strict mode. In React 18.x, only the UNSAFE_ name will work. ' + 'To rename all deprecated lifecycles to their new names, you can run ' + '`npx react-codemod rename-unsafe-lifecycles` in your project source folder.\\n' + '\\nPlease update the following components: %s', _sortedNames5);\n    }\n  };\n\n  var pendingLegacyContextWarning = new Map(); // Tracks components we have already warned about.\n\n  var didWarnAboutLegacyContext = new Set();\n\n  ReactStrictModeWarnings.recordLegacyContextWarning = function (fiber, instance) {\n    var strictRoot = findStrictRoot(fiber);\n\n    if (strictRoot === null) {\n      error('Expected to find a StrictMode component in a strict mode tree. ' + 'This error is likely caused by a bug in React. Please file an issue.');\n\n      return;\n    } // Dedup strategy: Warn once per component.\n\n\n    if (didWarnAboutLegacyContext.has(fiber.type)) {\n      return;\n    }\n\n    var warningsForRoot = pendingLegacyContextWarning.get(strictRoot);\n\n    if (fiber.type.contextTypes != null || fiber.type.childContextTypes != null || instance !== null && typeof instance.getChildContext === 'function') {\n      if (warningsForRoot === undefined) {\n        warningsForRoot = [];\n        pendingLegacyContextWarning.set(strictRoot, warningsForRoot);\n      }\n\n      warningsForRoot.push(fiber);\n    }\n  };\n\n  ReactStrictModeWarnings.flushLegacyContextWarning = function () {\n    pendingLegacyContextWarning.forEach(function (fiberArray, strictRoot) {\n      if (fiberArray.length === 0) {\n        return;\n      }\n\n      var firstFiber = fiberArray[0];\n      var uniqueNames = new Set();\n      fiberArray.forEach(function (fiber) {\n        uniqueNames.add(getComponentName(fiber.type) || 'Component');\n        didWarnAboutLegacyContext.add(fiber.type);\n      });\n      var sortedNames = setToSortedString(uniqueNames);\n\n      try {\n        setCurrentFiber(firstFiber);\n\n        error('Legacy context API has been detected within a strict-mode tree.' + '\\n\\nThe old API will be supported in all 16.x releases, but applications ' + 'using it should migrate to the new version.' + '\\n\\nPlease update the following components: %s' + '\\n\\nLearn more about this warning here: https://reactjs.org/link/legacy-context', sortedNames);\n      } finally {\n        resetCurrentFiber();\n      }\n    });\n  };\n\n  ReactStrictModeWarnings.discardPendingWarnings = function () {\n    pendingComponentWillMountWarnings = [];\n    pendingUNSAFE_ComponentWillMountWarnings = [];\n    pendingComponentWillReceivePropsWarnings = [];\n    pendingUNSAFE_ComponentWillReceivePropsWarnings = [];\n    pendingComponentWillUpdateWarnings = [];\n    pendingUNSAFE_ComponentWillUpdateWarnings = [];\n    pendingLegacyContextWarning = new Map();\n  };\n}\n\nfunction resolveDefaultProps(Component, baseProps) {\n  if (Component && Component.defaultProps) {\n    // Resolve default props. Taken from ReactElement\n    var props = _assign({}, baseProps);\n\n    var defaultProps = Component.defaultProps;\n\n    for (var propName in defaultProps) {\n      if (props[propName] === undefined) {\n        props[propName] = defaultProps[propName];\n      }\n    }\n\n    return props;\n  }\n\n  return baseProps;\n}\n\n// Max 31 bit integer. The max integer size in V8 for 32-bit systems.\n// Math.pow(2, 30) - 1\n// 0b111111111111111111111111111111\nvar MAX_SIGNED_31_BIT_INT = 1073741823;\n\nvar valueCursor = createCursor(null);\nvar rendererSigil;\n\n{\n  // Use this to detect multiple renderers using the same context\n  rendererSigil = {};\n}\n\nvar currentlyRenderingFiber = null;\nvar lastContextDependency = null;\nvar lastContextWithAllBitsObserved = null;\nvar isDisallowedContextReadInDEV = false;\nfunction resetContextDependencies() {\n  // This is called right before React yields execution, to ensure `readContext`\n  // cannot be called outside the render phase.\n  currentlyRenderingFiber = null;\n  lastContextDependency = null;\n  lastContextWithAllBitsObserved = null;\n\n  {\n    isDisallowedContextReadInDEV = false;\n  }\n}\nfunction enterDisallowedContextReadInDEV() {\n  {\n    isDisallowedContextReadInDEV = true;\n  }\n}\nfunction exitDisallowedContextReadInDEV() {\n  {\n    isDisallowedContextReadInDEV = false;\n  }\n}\nfunction pushProvider(providerFiber, nextValue) {\n  var context = providerFiber.type._context;\n\n  {\n    push(valueCursor, context._currentValue, providerFiber);\n    context._currentValue = nextValue;\n\n    {\n      if (context._currentRenderer !== undefined && context._currentRenderer !== null && context._currentRenderer !== rendererSigil) {\n        error('Detected multiple renderers concurrently rendering the ' + 'same context provider. This is currently unsupported.');\n      }\n\n      context._currentRenderer = rendererSigil;\n    }\n  }\n}\nfunction popProvider(providerFiber) {\n  var currentValue = valueCursor.current;\n  pop(valueCursor, providerFiber);\n  var context = providerFiber.type._context;\n\n  {\n    context._currentValue = currentValue;\n  }\n}\nfunction calculateChangedBits(context, newValue, oldValue) {\n  if (objectIs(oldValue, newValue)) {\n    // No change\n    return 0;\n  } else {\n    var changedBits = typeof context._calculateChangedBits === 'function' ? context._calculateChangedBits(oldValue, newValue) : MAX_SIGNED_31_BIT_INT;\n\n    {\n      if ((changedBits & MAX_SIGNED_31_BIT_INT) !== changedBits) {\n        error('calculateChangedBits: Expected the return value to be a ' + '31-bit integer. Instead received: %s', changedBits);\n      }\n    }\n\n    return changedBits | 0;\n  }\n}\nfunction scheduleWorkOnParentPath(parent, renderLanes) {\n  // Update the child lanes of all the ancestors, including the alternates.\n  var node = parent;\n\n  while (node !== null) {\n    var alternate = node.alternate;\n\n    if (!isSubsetOfLanes(node.childLanes, renderLanes)) {\n      node.childLanes = mergeLanes(node.childLanes, renderLanes);\n\n      if (alternate !== null) {\n        alternate.childLanes = mergeLanes(alternate.childLanes, renderLanes);\n      }\n    } else if (alternate !== null && !isSubsetOfLanes(alternate.childLanes, renderLanes)) {\n      alternate.childLanes = mergeLanes(alternate.childLanes, renderLanes);\n    } else {\n      // Neither alternate was updated, which means the rest of the\n      // ancestor path already has sufficient priority.\n      break;\n    }\n\n    node = node.return;\n  }\n}\nfunction propagateContextChange(workInProgress, context, changedBits, renderLanes) {\n  var fiber = workInProgress.child;\n\n  if (fiber !== null) {\n    // Set the return pointer of the child to the work-in-progress fiber.\n    fiber.return = workInProgress;\n  }\n\n  while (fiber !== null) {\n    var nextFiber = void 0; // Visit this fiber.\n\n    var list = fiber.dependencies;\n\n    if (list !== null) {\n      nextFiber = fiber.child;\n      var dependency = list.firstContext;\n\n      while (dependency !== null) {\n        // Check if the context matches.\n        if (dependency.context === context && (dependency.observedBits & changedBits) !== 0) {\n          // Match! Schedule an update on this fiber.\n          if (fiber.tag === ClassComponent) {\n            // Schedule a force update on the work-in-progress.\n            var update = createUpdate(NoTimestamp, pickArbitraryLane(renderLanes));\n            update.tag = ForceUpdate; // TODO: Because we don't have a work-in-progress, this will add the\n            // update to the current fiber, too, which means it will persist even if\n            // this render is thrown away. Since it's a race condition, not sure it's\n            // worth fixing.\n\n            enqueueUpdate(fiber, update);\n          }\n\n          fiber.lanes = mergeLanes(fiber.lanes, renderLanes);\n          var alternate = fiber.alternate;\n\n          if (alternate !== null) {\n            alternate.lanes = mergeLanes(alternate.lanes, renderLanes);\n          }\n\n          scheduleWorkOnParentPath(fiber.return, renderLanes); // Mark the updated lanes on the list, too.\n\n          list.lanes = mergeLanes(list.lanes, renderLanes); // Since we already found a match, we can stop traversing the\n          // dependency list.\n\n          break;\n        }\n\n        dependency = dependency.next;\n      }\n    } else if (fiber.tag === ContextProvider) {\n      // Don't scan deeper if this is a matching provider\n      nextFiber = fiber.type === workInProgress.type ? null : fiber.child;\n    } else {\n      // Traverse down.\n      nextFiber = fiber.child;\n    }\n\n    if (nextFiber !== null) {\n      // Set the return pointer of the child to the work-in-progress fiber.\n      nextFiber.return = fiber;\n    } else {\n      // No child. Traverse to next sibling.\n      nextFiber = fiber;\n\n      while (nextFiber !== null) {\n        if (nextFiber === workInProgress) {\n          // We're back to the root of this subtree. Exit.\n          nextFiber = null;\n          break;\n        }\n\n        var sibling = nextFiber.sibling;\n\n        if (sibling !== null) {\n          // Set the return pointer of the sibling to the work-in-progress fiber.\n          sibling.return = nextFiber.return;\n          nextFiber = sibling;\n          break;\n        } // No more siblings. Traverse up.\n\n\n        nextFiber = nextFiber.return;\n      }\n    }\n\n    fiber = nextFiber;\n  }\n}\nfunction prepareToReadContext(workInProgress, renderLanes) {\n  currentlyRenderingFiber = workInProgress;\n  lastContextDependency = null;\n  lastContextWithAllBitsObserved = null;\n  var dependencies = workInProgress.dependencies;\n\n  if (dependencies !== null) {\n    var firstContext = dependencies.firstContext;\n\n    if (firstContext !== null) {\n      if (includesSomeLane(dependencies.lanes, renderLanes)) {\n        // Context list has a pending update. Mark that this fiber performed work.\n        markWorkInProgressReceivedUpdate();\n      } // Reset the work-in-progress list\n\n\n      dependencies.firstContext = null;\n    }\n  }\n}\nfunction readContext(context, observedBits) {\n  {\n    // This warning would fire if you read context inside a Hook like useMemo.\n    // Unlike the class check below, it's not enforced in production for perf.\n    if (isDisallowedContextReadInDEV) {\n      error('Context can only be read while React is rendering. ' + 'In classes, you can read it in the render method or getDerivedStateFromProps. ' + 'In function components, you can read it directly in the function body, but not ' + 'inside Hooks like useReducer() or useMemo().');\n    }\n  }\n\n  if (lastContextWithAllBitsObserved === context) ; else if (observedBits === false || observedBits === 0) ; else {\n    var resolvedObservedBits; // Avoid deopting on observable arguments or heterogeneous types.\n\n    if (typeof observedBits !== 'number' || observedBits === MAX_SIGNED_31_BIT_INT) {\n      // Observe all updates.\n      lastContextWithAllBitsObserved = context;\n      resolvedObservedBits = MAX_SIGNED_31_BIT_INT;\n    } else {\n      resolvedObservedBits = observedBits;\n    }\n\n    var contextItem = {\n      context: context,\n      observedBits: resolvedObservedBits,\n      next: null\n    };\n\n    if (lastContextDependency === null) {\n      if (!(currentlyRenderingFiber !== null)) {\n        {\n          throw Error( \"Context can only be read while React is rendering. In classes, you can read it in the render method or getDerivedStateFromProps. In function components, you can read it directly in the function body, but not inside Hooks like useReducer() or useMemo().\" );\n        }\n      } // This is the first dependency for this component. Create a new list.\n\n\n      lastContextDependency = contextItem;\n      currentlyRenderingFiber.dependencies = {\n        lanes: NoLanes,\n        firstContext: contextItem,\n        responders: null\n      };\n    } else {\n      // Append a new context item.\n      lastContextDependency = lastContextDependency.next = contextItem;\n    }\n  }\n\n  return  context._currentValue ;\n}\n\nvar UpdateState = 0;\nvar ReplaceState = 1;\nvar ForceUpdate = 2;\nvar CaptureUpdate = 3; // Global state that is reset at the beginning of calling `processUpdateQueue`.\n// It should only be read right after calling `processUpdateQueue`, via\n// `checkHasForceUpdateAfterProcessing`.\n\nvar hasForceUpdate = false;\nvar didWarnUpdateInsideUpdate;\nvar currentlyProcessingQueue;\n\n{\n  didWarnUpdateInsideUpdate = false;\n  currentlyProcessingQueue = null;\n}\n\nfunction initializeUpdateQueue(fiber) {\n  var queue = {\n    baseState: fiber.memoizedState,\n    firstBaseUpdate: null,\n    lastBaseUpdate: null,\n    shared: {\n      pending: null\n    },\n    effects: null\n  };\n  fiber.updateQueue = queue;\n}\nfunction cloneUpdateQueue(current, workInProgress) {\n  // Clone the update queue from current. Unless it's already a clone.\n  var queue = workInProgress.updateQueue;\n  var currentQueue = current.updateQueue;\n\n  if (queue === currentQueue) {\n    var clone = {\n      baseState: currentQueue.baseState,\n      firstBaseUpdate: currentQueue.firstBaseUpdate,\n      lastBaseUpdate: currentQueue.lastBaseUpdate,\n      shared: currentQueue.shared,\n      effects: currentQueue.effects\n    };\n    workInProgress.updateQueue = clone;\n  }\n}\nfunction createUpdate(eventTime, lane) {\n  var update = {\n    eventTime: eventTime,\n    lane: lane,\n    tag: UpdateState,\n    payload: null,\n    callback: null,\n    next: null\n  };\n  return update;\n}\nfunction enqueueUpdate(fiber, update) {\n  var updateQueue = fiber.updateQueue;\n\n  if (updateQueue === null) {\n    // Only occurs if the fiber has been unmounted.\n    return;\n  }\n\n  var sharedQueue = updateQueue.shared;\n  var pending = sharedQueue.pending;\n\n  if (pending === null) {\n    // This is the first update. Create a circular list.\n    update.next = update;\n  } else {\n    update.next = pending.next;\n    pending.next = update;\n  }\n\n  sharedQueue.pending = update;\n\n  {\n    if (currentlyProcessingQueue === sharedQueue && !didWarnUpdateInsideUpdate) {\n      error('An update (setState, replaceState, or forceUpdate) was scheduled ' + 'from inside an update function. Update functions should be pure, ' + 'with zero side-effects. Consider using componentDidUpdate or a ' + 'callback.');\n\n      didWarnUpdateInsideUpdate = true;\n    }\n  }\n}\nfunction enqueueCapturedUpdate(workInProgress, capturedUpdate) {\n  // Captured updates are updates that are thrown by a child during the render\n  // phase. They should be discarded if the render is aborted. Therefore,\n  // we should only put them on the work-in-progress queue, not the current one.\n  var queue = workInProgress.updateQueue; // Check if the work-in-progress queue is a clone.\n\n  var current = workInProgress.alternate;\n\n  if (current !== null) {\n    var currentQueue = current.updateQueue;\n\n    if (queue === currentQueue) {\n      // The work-in-progress queue is the same as current. This happens when\n      // we bail out on a parent fiber that then captures an error thrown by\n      // a child. Since we want to append the update only to the work-in\n      // -progress queue, we need to clone the updates. We usually clone during\n      // processUpdateQueue, but that didn't happen in this case because we\n      // skipped over the parent when we bailed out.\n      var newFirst = null;\n      var newLast = null;\n      var firstBaseUpdate = queue.firstBaseUpdate;\n\n      if (firstBaseUpdate !== null) {\n        // Loop through the updates and clone them.\n        var update = firstBaseUpdate;\n\n        do {\n          var clone = {\n            eventTime: update.eventTime,\n            lane: update.lane,\n            tag: update.tag,\n            payload: update.payload,\n            callback: update.callback,\n            next: null\n          };\n\n          if (newLast === null) {\n            newFirst = newLast = clone;\n          } else {\n            newLast.next = clone;\n            newLast = clone;\n          }\n\n          update = update.next;\n        } while (update !== null); // Append the captured update the end of the cloned list.\n\n\n        if (newLast === null) {\n          newFirst = newLast = capturedUpdate;\n        } else {\n          newLast.next = capturedUpdate;\n          newLast = capturedUpdate;\n        }\n      } else {\n        // There are no base updates.\n        newFirst = newLast = capturedUpdate;\n      }\n\n      queue = {\n        baseState: currentQueue.baseState,\n        firstBaseUpdate: newFirst,\n        lastBaseUpdate: newLast,\n        shared: currentQueue.shared,\n        effects: currentQueue.effects\n      };\n      workInProgress.updateQueue = queue;\n      return;\n    }\n  } // Append the update to the end of the list.\n\n\n  var lastBaseUpdate = queue.lastBaseUpdate;\n\n  if (lastBaseUpdate === null) {\n    queue.firstBaseUpdate = capturedUpdate;\n  } else {\n    lastBaseUpdate.next = capturedUpdate;\n  }\n\n  queue.lastBaseUpdate = capturedUpdate;\n}\n\nfunction getStateFromUpdate(workInProgress, queue, update, prevState, nextProps, instance) {\n  switch (update.tag) {\n    case ReplaceState:\n      {\n        var payload = update.payload;\n\n        if (typeof payload === 'function') {\n          // Updater function\n          {\n            enterDisallowedContextReadInDEV();\n          }\n\n          var nextState = payload.call(instance, prevState, nextProps);\n\n          {\n            if ( workInProgress.mode & StrictMode) {\n              disableLogs();\n\n              try {\n                payload.call(instance, prevState, nextProps);\n              } finally {\n                reenableLogs();\n              }\n            }\n\n            exitDisallowedContextReadInDEV();\n          }\n\n          return nextState;\n        } // State object\n\n\n        return payload;\n      }\n\n    case CaptureUpdate:\n      {\n        workInProgress.flags = workInProgress.flags & ~ShouldCapture | DidCapture;\n      }\n    // Intentional fallthrough\n\n    case UpdateState:\n      {\n        var _payload = update.payload;\n        var partialState;\n\n        if (typeof _payload === 'function') {\n          // Updater function\n          {\n            enterDisallowedContextReadInDEV();\n          }\n\n          partialState = _payload.call(instance, prevState, nextProps);\n\n          {\n            if ( workInProgress.mode & StrictMode) {\n              disableLogs();\n\n              try {\n                _payload.call(instance, prevState, nextProps);\n              } finally {\n                reenableLogs();\n              }\n            }\n\n            exitDisallowedContextReadInDEV();\n          }\n        } else {\n          // Partial state object\n          partialState = _payload;\n        }\n\n        if (partialState === null || partialState === undefined) {\n          // Null and undefined are treated as no-ops.\n          return prevState;\n        } // Merge the partial state and the previous state.\n\n\n        return _assign({}, prevState, partialState);\n      }\n\n    case ForceUpdate:\n      {\n        hasForceUpdate = true;\n        return prevState;\n      }\n  }\n\n  return prevState;\n}\n\nfunction processUpdateQueue(workInProgress, props, instance, renderLanes) {\n  // This is always non-null on a ClassComponent or HostRoot\n  var queue = workInProgress.updateQueue;\n  hasForceUpdate = false;\n\n  {\n    currentlyProcessingQueue = queue.shared;\n  }\n\n  var firstBaseUpdate = queue.firstBaseUpdate;\n  var lastBaseUpdate = queue.lastBaseUpdate; // Check if there are pending updates. If so, transfer them to the base queue.\n\n  var pendingQueue = queue.shared.pending;\n\n  if (pendingQueue !== null) {\n    queue.shared.pending = null; // The pending queue is circular. Disconnect the pointer between first\n    // and last so that it's non-circular.\n\n    var lastPendingUpdate = pendingQueue;\n    var firstPendingUpdate = lastPendingUpdate.next;\n    lastPendingUpdate.next = null; // Append pending updates to base queue\n\n    if (lastBaseUpdate === null) {\n      firstBaseUpdate = firstPendingUpdate;\n    } else {\n      lastBaseUpdate.next = firstPendingUpdate;\n    }\n\n    lastBaseUpdate = lastPendingUpdate; // If there's a current queue, and it's different from the base queue, then\n    // we need to transfer the updates to that queue, too. Because the base\n    // queue is a singly-linked list with no cycles, we can append to both\n    // lists and take advantage of structural sharing.\n    // TODO: Pass `current` as argument\n\n    var current = workInProgress.alternate;\n\n    if (current !== null) {\n      // This is always non-null on a ClassComponent or HostRoot\n      var currentQueue = current.updateQueue;\n      var currentLastBaseUpdate = currentQueue.lastBaseUpdate;\n\n      if (currentLastBaseUpdate !== lastBaseUpdate) {\n        if (currentLastBaseUpdate === null) {\n          currentQueue.firstBaseUpdate = firstPendingUpdate;\n        } else {\n          currentLastBaseUpdate.next = firstPendingUpdate;\n        }\n\n        currentQueue.lastBaseUpdate = lastPendingUpdate;\n      }\n    }\n  } // These values may change as we process the queue.\n\n\n  if (firstBaseUpdate !== null) {\n    // Iterate through the list of updates to compute the result.\n    var newState = queue.baseState; // TODO: Don't need to accumulate this. Instead, we can remove renderLanes\n    // from the original lanes.\n\n    var newLanes = NoLanes;\n    var newBaseState = null;\n    var newFirstBaseUpdate = null;\n    var newLastBaseUpdate = null;\n    var update = firstBaseUpdate;\n\n    do {\n      var updateLane = update.lane;\n      var updateEventTime = update.eventTime;\n\n      if (!isSubsetOfLanes(renderLanes, updateLane)) {\n        // Priority is insufficient. Skip this update. If this is the first\n        // skipped update, the previous update/state is the new base\n        // update/state.\n        var clone = {\n          eventTime: updateEventTime,\n          lane: updateLane,\n          tag: update.tag,\n          payload: update.payload,\n          callback: update.callback,\n          next: null\n        };\n\n        if (newLastBaseUpdate === null) {\n          newFirstBaseUpdate = newLastBaseUpdate = clone;\n          newBaseState = newState;\n        } else {\n          newLastBaseUpdate = newLastBaseUpdate.next = clone;\n        } // Update the remaining priority in the queue.\n\n\n        newLanes = mergeLanes(newLanes, updateLane);\n      } else {\n        // This update does have sufficient priority.\n        if (newLastBaseUpdate !== null) {\n          var _clone = {\n            eventTime: updateEventTime,\n            // This update is going to be committed so we never want uncommit\n            // it. Using NoLane works because 0 is a subset of all bitmasks, so\n            // this will never be skipped by the check above.\n            lane: NoLane,\n            tag: update.tag,\n            payload: update.payload,\n            callback: update.callback,\n            next: null\n          };\n          newLastBaseUpdate = newLastBaseUpdate.next = _clone;\n        } // Process this update.\n\n\n        newState = getStateFromUpdate(workInProgress, queue, update, newState, props, instance);\n        var callback = update.callback;\n\n        if (callback !== null) {\n          workInProgress.flags |= Callback;\n          var effects = queue.effects;\n\n          if (effects === null) {\n            queue.effects = [update];\n          } else {\n            effects.push(update);\n          }\n        }\n      }\n\n      update = update.next;\n\n      if (update === null) {\n        pendingQueue = queue.shared.pending;\n\n        if (pendingQueue === null) {\n          break;\n        } else {\n          // An update was scheduled from inside a reducer. Add the new\n          // pending updates to the end of the list and keep processing.\n          var _lastPendingUpdate = pendingQueue; // Intentionally unsound. Pending updates form a circular list, but we\n          // unravel them when transferring them to the base queue.\n\n          var _firstPendingUpdate = _lastPendingUpdate.next;\n          _lastPendingUpdate.next = null;\n          update = _firstPendingUpdate;\n          queue.lastBaseUpdate = _lastPendingUpdate;\n          queue.shared.pending = null;\n        }\n      }\n    } while (true);\n\n    if (newLastBaseUpdate === null) {\n      newBaseState = newState;\n    }\n\n    queue.baseState = newBaseState;\n    queue.firstBaseUpdate = newFirstBaseUpdate;\n    queue.lastBaseUpdate = newLastBaseUpdate; // Set the remaining expiration time to be whatever is remaining in the queue.\n    // This should be fine because the only two other things that contribute to\n    // expiration time are props and context. We're already in the middle of the\n    // begin phase by the time we start processing the queue, so we've already\n    // dealt with the props. Context in components that specify\n    // shouldComponentUpdate is tricky; but we'll have to account for\n    // that regardless.\n\n    markSkippedUpdateLanes(newLanes);\n    workInProgress.lanes = newLanes;\n    workInProgress.memoizedState = newState;\n  }\n\n  {\n    currentlyProcessingQueue = null;\n  }\n}\n\nfunction callCallback(callback, context) {\n  if (!(typeof callback === 'function')) {\n    {\n      throw Error( \"Invalid argument passed as callback. Expected a function. Instead received: \" + callback );\n    }\n  }\n\n  callback.call(context);\n}\n\nfunction resetHasForceUpdateBeforeProcessing() {\n  hasForceUpdate = false;\n}\nfunction checkHasForceUpdateAfterProcessing() {\n  return hasForceUpdate;\n}\nfunction commitUpdateQueue(finishedWork, finishedQueue, instance) {\n  // Commit the effects\n  var effects = finishedQueue.effects;\n  finishedQueue.effects = null;\n\n  if (effects !== null) {\n    for (var i = 0; i < effects.length; i++) {\n      var effect = effects[i];\n      var callback = effect.callback;\n\n      if (callback !== null) {\n        effect.callback = null;\n        callCallback(callback, instance);\n      }\n    }\n  }\n}\n\nvar fakeInternalInstance = {};\nvar isArray = Array.isArray; // React.Component uses a shared frozen object by default.\n// We'll use it to determine whether we need to initialize legacy refs.\n\nvar emptyRefsObject = new React.Component().refs;\nvar didWarnAboutStateAssignmentForComponent;\nvar didWarnAboutUninitializedState;\nvar didWarnAboutGetSnapshotBeforeUpdateWithoutDidUpdate;\nvar didWarnAboutLegacyLifecyclesAndDerivedState;\nvar didWarnAboutUndefinedDerivedState;\nvar warnOnUndefinedDerivedState;\nvar warnOnInvalidCallback;\nvar didWarnAboutDirectlyAssigningPropsToState;\nvar didWarnAboutContextTypeAndContextTypes;\nvar didWarnAboutInvalidateContextType;\n\n{\n  didWarnAboutStateAssignmentForComponent = new Set();\n  didWarnAboutUninitializedState = new Set();\n  didWarnAboutGetSnapshotBeforeUpdateWithoutDidUpdate = new Set();\n  didWarnAboutLegacyLifecyclesAndDerivedState = new Set();\n  didWarnAboutDirectlyAssigningPropsToState = new Set();\n  didWarnAboutUndefinedDerivedState = new Set();\n  didWarnAboutContextTypeAndContextTypes = new Set();\n  didWarnAboutInvalidateContextType = new Set();\n  var didWarnOnInvalidCallback = new Set();\n\n  warnOnInvalidCallback = function (callback, callerName) {\n    if (callback === null || typeof callback === 'function') {\n      return;\n    }\n\n    var key = callerName + '_' + callback;\n\n    if (!didWarnOnInvalidCallback.has(key)) {\n      didWarnOnInvalidCallback.add(key);\n\n      error('%s(...): Expected the last optional `callback` argument to be a ' + 'function. Instead received: %s.', callerName, callback);\n    }\n  };\n\n  warnOnUndefinedDerivedState = function (type, partialState) {\n    if (partialState === undefined) {\n      var componentName = getComponentName(type) || 'Component';\n\n      if (!didWarnAboutUndefinedDerivedState.has(componentName)) {\n        didWarnAboutUndefinedDerivedState.add(componentName);\n\n        error('%s.getDerivedStateFromProps(): A valid state object (or null) must be returned. ' + 'You have returned undefined.', componentName);\n      }\n    }\n  }; // This is so gross but it's at least non-critical and can be removed if\n  // it causes problems. This is meant to give a nicer error message for\n  // ReactDOM15.unstable_renderSubtreeIntoContainer(reactDOM16Component,\n  // ...)) which otherwise throws a \"_processChildContext is not a function\"\n  // exception.\n\n\n  Object.defineProperty(fakeInternalInstance, '_processChildContext', {\n    enumerable: false,\n    value: function () {\n      {\n        {\n          throw Error( \"_processChildContext is not available in React 16+. This likely means you have multiple copies of React and are attempting to nest a React 15 tree inside a React 16 tree using unstable_renderSubtreeIntoContainer, which isn't supported. Try to make sure you have only one copy of React (and ideally, switch to ReactDOM.createPortal).\" );\n        }\n      }\n    }\n  });\n  Object.freeze(fakeInternalInstance);\n}\n\nfunction applyDerivedStateFromProps(workInProgress, ctor, getDerivedStateFromProps, nextProps) {\n  var prevState = workInProgress.memoizedState;\n\n  {\n    if ( workInProgress.mode & StrictMode) {\n      disableLogs();\n\n      try {\n        // Invoke the function an extra time to help detect side-effects.\n        getDerivedStateFromProps(nextProps, prevState);\n      } finally {\n        reenableLogs();\n      }\n    }\n  }\n\n  var partialState = getDerivedStateFromProps(nextProps, prevState);\n\n  {\n    warnOnUndefinedDerivedState(ctor, partialState);\n  } // Merge the partial state and the previous state.\n\n\n  var memoizedState = partialState === null || partialState === undefined ? prevState : _assign({}, prevState, partialState);\n  workInProgress.memoizedState = memoizedState; // Once the update queue is empty, persist the derived state onto the\n  // base state.\n\n  if (workInProgress.lanes === NoLanes) {\n    // Queue is always non-null for classes\n    var updateQueue = workInProgress.updateQueue;\n    updateQueue.baseState = memoizedState;\n  }\n}\nvar classComponentUpdater = {\n  isMounted: isMounted,\n  enqueueSetState: function (inst, payload, callback) {\n    var fiber = get(inst);\n    var eventTime = requestEventTime();\n    var lane = requestUpdateLane(fiber);\n    var update = createUpdate(eventTime, lane);\n    update.payload = payload;\n\n    if (callback !== undefined && callback !== null) {\n      {\n        warnOnInvalidCallback(callback, 'setState');\n      }\n\n      update.callback = callback;\n    }\n\n    enqueueUpdate(fiber, update);\n    scheduleUpdateOnFiber(fiber, lane, eventTime);\n  },\n  enqueueReplaceState: function (inst, payload, callback) {\n    var fiber = get(inst);\n    var eventTime = requestEventTime();\n    var lane = requestUpdateLane(fiber);\n    var update = createUpdate(eventTime, lane);\n    update.tag = ReplaceState;\n    update.payload = payload;\n\n    if (callback !== undefined && callback !== null) {\n      {\n        warnOnInvalidCallback(callback, 'replaceState');\n      }\n\n      update.callback = callback;\n    }\n\n    enqueueUpdate(fiber, update);\n    scheduleUpdateOnFiber(fiber, lane, eventTime);\n  },\n  enqueueForceUpdate: function (inst, callback) {\n    var fiber = get(inst);\n    var eventTime = requestEventTime();\n    var lane = requestUpdateLane(fiber);\n    var update = createUpdate(eventTime, lane);\n    update.tag = ForceUpdate;\n\n    if (callback !== undefined && callback !== null) {\n      {\n        warnOnInvalidCallback(callback, 'forceUpdate');\n      }\n\n      update.callback = callback;\n    }\n\n    enqueueUpdate(fiber, update);\n    scheduleUpdateOnFiber(fiber, lane, eventTime);\n  }\n};\n\nfunction checkShouldComponentUpdate(workInProgress, ctor, oldProps, newProps, oldState, newState, nextContext) {\n  var instance = workInProgress.stateNode;\n\n  if (typeof instance.shouldComponentUpdate === 'function') {\n    {\n      if ( workInProgress.mode & StrictMode) {\n        disableLogs();\n\n        try {\n          // Invoke the function an extra time to help detect side-effects.\n          instance.shouldComponentUpdate(newProps, newState, nextContext);\n        } finally {\n          reenableLogs();\n        }\n      }\n    }\n\n    var shouldUpdate = instance.shouldComponentUpdate(newProps, newState, nextContext);\n\n    {\n      if (shouldUpdate === undefined) {\n        error('%s.shouldComponentUpdate(): Returned undefined instead of a ' + 'boolean value. Make sure to return true or false.', getComponentName(ctor) || 'Component');\n      }\n    }\n\n    return shouldUpdate;\n  }\n\n  if (ctor.prototype && ctor.prototype.isPureReactComponent) {\n    return !shallowEqual(oldProps, newProps) || !shallowEqual(oldState, newState);\n  }\n\n  return true;\n}\n\nfunction checkClassInstance(workInProgress, ctor, newProps) {\n  var instance = workInProgress.stateNode;\n\n  {\n    var name = getComponentName(ctor) || 'Component';\n    var renderPresent = instance.render;\n\n    if (!renderPresent) {\n      if (ctor.prototype && typeof ctor.prototype.render === 'function') {\n        error('%s(...): No `render` method found on the returned component ' + 'instance: did you accidentally return an object from the constructor?', name);\n      } else {\n        error('%s(...): No `render` method found on the returned component ' + 'instance: you may have forgotten to define `render`.', name);\n      }\n    }\n\n    if (instance.getInitialState && !instance.getInitialState.isReactClassApproved && !instance.state) {\n      error('getInitialState was defined on %s, a plain JavaScript class. ' + 'This is only supported for classes created using React.createClass. ' + 'Did you mean to define a state property instead?', name);\n    }\n\n    if (instance.getDefaultProps && !instance.getDefaultProps.isReactClassApproved) {\n      error('getDefaultProps was defined on %s, a plain JavaScript class. ' + 'This is only supported for classes created using React.createClass. ' + 'Use a static property to define defaultProps instead.', name);\n    }\n\n    if (instance.propTypes) {\n      error('propTypes was defined as an instance property on %s. Use a static ' + 'property to define propTypes instead.', name);\n    }\n\n    if (instance.contextType) {\n      error('contextType was defined as an instance property on %s. Use a static ' + 'property to define contextType instead.', name);\n    }\n\n    {\n      if (instance.contextTypes) {\n        error('contextTypes was defined as an instance property on %s. Use a static ' + 'property to define contextTypes instead.', name);\n      }\n\n      if (ctor.contextType && ctor.contextTypes && !didWarnAboutContextTypeAndContextTypes.has(ctor)) {\n        didWarnAboutContextTypeAndContextTypes.add(ctor);\n\n        error('%s declares both contextTypes and contextType static properties. ' + 'The legacy contextTypes property will be ignored.', name);\n      }\n    }\n\n    if (typeof instance.componentShouldUpdate === 'function') {\n      error('%s has a method called ' + 'componentShouldUpdate(). Did you mean shouldComponentUpdate()? ' + 'The name is phrased as a question because the function is ' + 'expected to return a value.', name);\n    }\n\n    if (ctor.prototype && ctor.prototype.isPureReactComponent && typeof instance.shouldComponentUpdate !== 'undefined') {\n      error('%s has a method called shouldComponentUpdate(). ' + 'shouldComponentUpdate should not be used when extending React.PureComponent. ' + 'Please extend React.Component if shouldComponentUpdate is used.', getComponentName(ctor) || 'A pure component');\n    }\n\n    if (typeof instance.componentDidUnmount === 'function') {\n      error('%s has a method called ' + 'componentDidUnmount(). But there is no such lifecycle method. ' + 'Did you mean componentWillUnmount()?', name);\n    }\n\n    if (typeof instance.componentDidReceiveProps === 'function') {\n      error('%s has a method called ' + 'componentDidReceiveProps(). But there is no such lifecycle method. ' + 'If you meant to update the state in response to changing props, ' + 'use componentWillReceiveProps(). If you meant to fetch data or ' + 'run side-effects or mutations after React has updated the UI, use componentDidUpdate().', name);\n    }\n\n    if (typeof instance.componentWillRecieveProps === 'function') {\n      error('%s has a method called ' + 'componentWillRecieveProps(). Did you mean componentWillReceiveProps()?', name);\n    }\n\n    if (typeof instance.UNSAFE_componentWillRecieveProps === 'function') {\n      error('%s has a method called ' + 'UNSAFE_componentWillRecieveProps(). Did you mean UNSAFE_componentWillReceiveProps()?', name);\n    }\n\n    var hasMutatedProps = instance.props !== newProps;\n\n    if (instance.props !== undefined && hasMutatedProps) {\n      error('%s(...): When calling super() in `%s`, make sure to pass ' + \"up the same props that your component's constructor was passed.\", name, name);\n    }\n\n    if (instance.defaultProps) {\n      error('Setting defaultProps as an instance property on %s is not supported and will be ignored.' + ' Instead, define defaultProps as a static property on %s.', name, name);\n    }\n\n    if (typeof instance.getSnapshotBeforeUpdate === 'function' && typeof instance.componentDidUpdate !== 'function' && !didWarnAboutGetSnapshotBeforeUpdateWithoutDidUpdate.has(ctor)) {\n      didWarnAboutGetSnapshotBeforeUpdateWithoutDidUpdate.add(ctor);\n\n      error('%s: getSnapshotBeforeUpdate() should be used with componentDidUpdate(). ' + 'This component defines getSnapshotBeforeUpdate() only.', getComponentName(ctor));\n    }\n\n    if (typeof instance.getDerivedStateFromProps === 'function') {\n      error('%s: getDerivedStateFromProps() is defined as an instance method ' + 'and will be ignored. Instead, declare it as a static method.', name);\n    }\n\n    if (typeof instance.getDerivedStateFromError === 'function') {\n      error('%s: getDerivedStateFromError() is defined as an instance method ' + 'and will be ignored. Instead, declare it as a static method.', name);\n    }\n\n    if (typeof ctor.getSnapshotBeforeUpdate === 'function') {\n      error('%s: getSnapshotBeforeUpdate() is defined as a static method ' + 'and will be ignored. Instead, declare it as an instance method.', name);\n    }\n\n    var _state = instance.state;\n\n    if (_state && (typeof _state !== 'object' || isArray(_state))) {\n      error('%s.state: must be set to an object or null', name);\n    }\n\n    if (typeof instance.getChildContext === 'function' && typeof ctor.childContextTypes !== 'object') {\n      error('%s.getChildContext(): childContextTypes must be defined in order to ' + 'use getChildContext().', name);\n    }\n  }\n}\n\nfunction adoptClassInstance(workInProgress, instance) {\n  instance.updater = classComponentUpdater;\n  workInProgress.stateNode = instance; // The instance needs access to the fiber so that it can schedule updates\n\n  set(instance, workInProgress);\n\n  {\n    instance._reactInternalInstance = fakeInternalInstance;\n  }\n}\n\nfunction constructClassInstance(workInProgress, ctor, props) {\n  var isLegacyContextConsumer = false;\n  var unmaskedContext = emptyContextObject;\n  var context = emptyContextObject;\n  var contextType = ctor.contextType;\n\n  {\n    if ('contextType' in ctor) {\n      var isValid = // Allow null for conditional declaration\n      contextType === null || contextType !== undefined && contextType.$$typeof === REACT_CONTEXT_TYPE && contextType._context === undefined; // Not a <Context.Consumer>\n\n      if (!isValid && !didWarnAboutInvalidateContextType.has(ctor)) {\n        didWarnAboutInvalidateContextType.add(ctor);\n        var addendum = '';\n\n        if (contextType === undefined) {\n          addendum = ' However, it is set to undefined. ' + 'This can be caused by a typo or by mixing up named and default imports. ' + 'This can also happen due to a circular dependency, so ' + 'try moving the createContext() call to a separate file.';\n        } else if (typeof contextType !== 'object') {\n          addendum = ' However, it is set to a ' + typeof contextType + '.';\n        } else if (contextType.$$typeof === REACT_PROVIDER_TYPE) {\n          addendum = ' Did you accidentally pass the Context.Provider instead?';\n        } else if (contextType._context !== undefined) {\n          // <Context.Consumer>\n          addendum = ' Did you accidentally pass the Context.Consumer instead?';\n        } else {\n          addendum = ' However, it is set to an object with keys {' + Object.keys(contextType).join(', ') + '}.';\n        }\n\n        error('%s defines an invalid contextType. ' + 'contextType should point to the Context object returned by React.createContext().%s', getComponentName(ctor) || 'Component', addendum);\n      }\n    }\n  }\n\n  if (typeof contextType === 'object' && contextType !== null) {\n    context = readContext(contextType);\n  } else {\n    unmaskedContext = getUnmaskedContext(workInProgress, ctor, true);\n    var contextTypes = ctor.contextTypes;\n    isLegacyContextConsumer = contextTypes !== null && contextTypes !== undefined;\n    context = isLegacyContextConsumer ? getMaskedContext(workInProgress, unmaskedContext) : emptyContextObject;\n  } // Instantiate twice to help detect side-effects.\n\n\n  {\n    if ( workInProgress.mode & StrictMode) {\n      disableLogs();\n\n      try {\n        new ctor(props, context); // eslint-disable-line no-new\n      } finally {\n        reenableLogs();\n      }\n    }\n  }\n\n  var instance = new ctor(props, context);\n  var state = workInProgress.memoizedState = instance.state !== null && instance.state !== undefined ? instance.state : null;\n  adoptClassInstance(workInProgress, instance);\n\n  {\n    if (typeof ctor.getDerivedStateFromProps === 'function' && state === null) {\n      var componentName = getComponentName(ctor) || 'Component';\n\n      if (!didWarnAboutUninitializedState.has(componentName)) {\n        didWarnAboutUninitializedState.add(componentName);\n\n        error('`%s` uses `getDerivedStateFromProps` but its initial state is ' + '%s. This is not recommended. Instead, define the initial state by ' + 'assigning an object to `this.state` in the constructor of `%s`. ' + 'This ensures that `getDerivedStateFromProps` arguments have a consistent shape.', componentName, instance.state === null ? 'null' : 'undefined', componentName);\n      }\n    } // If new component APIs are defined, \"unsafe\" lifecycles won't be called.\n    // Warn about these lifecycles if they are present.\n    // Don't warn about react-lifecycles-compat polyfilled methods though.\n\n\n    if (typeof ctor.getDerivedStateFromProps === 'function' || typeof instance.getSnapshotBeforeUpdate === 'function') {\n      var foundWillMountName = null;\n      var foundWillReceivePropsName = null;\n      var foundWillUpdateName = null;\n\n      if (typeof instance.componentWillMount === 'function' && instance.componentWillMount.__suppressDeprecationWarning !== true) {\n        foundWillMountName = 'componentWillMount';\n      } else if (typeof instance.UNSAFE_componentWillMount === 'function') {\n        foundWillMountName = 'UNSAFE_componentWillMount';\n      }\n\n      if (typeof instance.componentWillReceiveProps === 'function' && instance.componentWillReceiveProps.__suppressDeprecationWarning !== true) {\n        foundWillReceivePropsName = 'componentWillReceiveProps';\n      } else if (typeof instance.UNSAFE_componentWillReceiveProps === 'function') {\n        foundWillReceivePropsName = 'UNSAFE_componentWillReceiveProps';\n      }\n\n      if (typeof instance.componentWillUpdate === 'function' && instance.componentWillUpdate.__suppressDeprecationWarning !== true) {\n        foundWillUpdateName = 'componentWillUpdate';\n      } else if (typeof instance.UNSAFE_componentWillUpdate === 'function') {\n        foundWillUpdateName = 'UNSAFE_componentWillUpdate';\n      }\n\n      if (foundWillMountName !== null || foundWillReceivePropsName !== null || foundWillUpdateName !== null) {\n        var _componentName = getComponentName(ctor) || 'Component';\n\n        var newApiName = typeof ctor.getDerivedStateFromProps === 'function' ? 'getDerivedStateFromProps()' : 'getSnapshotBeforeUpdate()';\n\n        if (!didWarnAboutLegacyLifecyclesAndDerivedState.has(_componentName)) {\n          didWarnAboutLegacyLifecyclesAndDerivedState.add(_componentName);\n\n          error('Unsafe legacy lifecycles will not be called for components using new component APIs.\\n\\n' + '%s uses %s but also contains the following legacy lifecycles:%s%s%s\\n\\n' + 'The above lifecycles should be removed. Learn more about this warning here:\\n' + 'https://reactjs.org/link/unsafe-component-lifecycles', _componentName, newApiName, foundWillMountName !== null ? \"\\n  \" + foundWillMountName : '', foundWillReceivePropsName !== null ? \"\\n  \" + foundWillReceivePropsName : '', foundWillUpdateName !== null ? \"\\n  \" + foundWillUpdateName : '');\n        }\n      }\n    }\n  } // Cache unmasked context so we can avoid recreating masked context unless necessary.\n  // ReactFiberContext usually updates this cache but can't for newly-created instances.\n\n\n  if (isLegacyContextConsumer) {\n    cacheContext(workInProgress, unmaskedContext, context);\n  }\n\n  return instance;\n}\n\nfunction callComponentWillMount(workInProgress, instance) {\n  var oldState = instance.state;\n\n  if (typeof instance.componentWillMount === 'function') {\n    instance.componentWillMount();\n  }\n\n  if (typeof instance.UNSAFE_componentWillMount === 'function') {\n    instance.UNSAFE_componentWillMount();\n  }\n\n  if (oldState !== instance.state) {\n    {\n      error('%s.componentWillMount(): Assigning directly to this.state is ' + \"deprecated (except inside a component's \" + 'constructor). Use setState instead.', getComponentName(workInProgress.type) || 'Component');\n    }\n\n    classComponentUpdater.enqueueReplaceState(instance, instance.state, null);\n  }\n}\n\nfunction callComponentWillReceiveProps(workInProgress, instance, newProps, nextContext) {\n  var oldState = instance.state;\n\n  if (typeof instance.componentWillReceiveProps === 'function') {\n    instance.componentWillReceiveProps(newProps, nextContext);\n  }\n\n  if (typeof instance.UNSAFE_componentWillReceiveProps === 'function') {\n    instance.UNSAFE_componentWillReceiveProps(newProps, nextContext);\n  }\n\n  if (instance.state !== oldState) {\n    {\n      var componentName = getComponentName(workInProgress.type) || 'Component';\n\n      if (!didWarnAboutStateAssignmentForComponent.has(componentName)) {\n        didWarnAboutStateAssignmentForComponent.add(componentName);\n\n        error('%s.componentWillReceiveProps(): Assigning directly to ' + \"this.state is deprecated (except inside a component's \" + 'constructor). Use setState instead.', componentName);\n      }\n    }\n\n    classComponentUpdater.enqueueReplaceState(instance, instance.state, null);\n  }\n} // Invokes the mount life-cycles on a previously never rendered instance.\n\n\nfunction mountClassInstance(workInProgress, ctor, newProps, renderLanes) {\n  {\n    checkClassInstance(workInProgress, ctor, newProps);\n  }\n\n  var instance = workInProgress.stateNode;\n  instance.props = newProps;\n  instance.state = workInProgress.memoizedState;\n  instance.refs = emptyRefsObject;\n  initializeUpdateQueue(workInProgress);\n  var contextType = ctor.contextType;\n\n  if (typeof contextType === 'object' && contextType !== null) {\n    instance.context = readContext(contextType);\n  } else {\n    var unmaskedContext = getUnmaskedContext(workInProgress, ctor, true);\n    instance.context = getMaskedContext(workInProgress, unmaskedContext);\n  }\n\n  {\n    if (instance.state === newProps) {\n      var componentName = getComponentName(ctor) || 'Component';\n\n      if (!didWarnAboutDirectlyAssigningPropsToState.has(componentName)) {\n        didWarnAboutDirectlyAssigningPropsToState.add(componentName);\n\n        error('%s: It is not recommended to assign props directly to state ' + \"because updates to props won't be reflected in state. \" + 'In most cases, it is better to use props directly.', componentName);\n      }\n    }\n\n    if (workInProgress.mode & StrictMode) {\n      ReactStrictModeWarnings.recordLegacyContextWarning(workInProgress, instance);\n    }\n\n    {\n      ReactStrictModeWarnings.recordUnsafeLifecycleWarnings(workInProgress, instance);\n    }\n  }\n\n  processUpdateQueue(workInProgress, newProps, instance, renderLanes);\n  instance.state = workInProgress.memoizedState;\n  var getDerivedStateFromProps = ctor.getDerivedStateFromProps;\n\n  if (typeof getDerivedStateFromProps === 'function') {\n    applyDerivedStateFromProps(workInProgress, ctor, getDerivedStateFromProps, newProps);\n    instance.state = workInProgress.memoizedState;\n  } // In order to support react-lifecycles-compat polyfilled components,\n  // Unsafe lifecycles should not be invoked for components using the new APIs.\n\n\n  if (typeof ctor.getDerivedStateFromProps !== 'function' && typeof instance.getSnapshotBeforeUpdate !== 'function' && (typeof instance.UNSAFE_componentWillMount === 'function' || typeof instance.componentWillMount === 'function')) {\n    callComponentWillMount(workInProgress, instance); // If we had additional state updates during this life-cycle, let's\n    // process them now.\n\n    processUpdateQueue(workInProgress, newProps, instance, renderLanes);\n    instance.state = workInProgress.memoizedState;\n  }\n\n  if (typeof instance.componentDidMount === 'function') {\n    workInProgress.flags |= Update;\n  }\n}\n\nfunction resumeMountClassInstance(workInProgress, ctor, newProps, renderLanes) {\n  var instance = workInProgress.stateNode;\n  var oldProps = workInProgress.memoizedProps;\n  instance.props = oldProps;\n  var oldContext = instance.context;\n  var contextType = ctor.contextType;\n  var nextContext = emptyContextObject;\n\n  if (typeof contextType === 'object' && contextType !== null) {\n    nextContext = readContext(contextType);\n  } else {\n    var nextLegacyUnmaskedContext = getUnmaskedContext(workInProgress, ctor, true);\n    nextContext = getMaskedContext(workInProgress, nextLegacyUnmaskedContext);\n  }\n\n  var getDerivedStateFromProps = ctor.getDerivedStateFromProps;\n  var hasNewLifecycles = typeof getDerivedStateFromProps === 'function' || typeof instance.getSnapshotBeforeUpdate === 'function'; // Note: During these life-cycles, instance.props/instance.state are what\n  // ever the previously attempted to render - not the \"current\". However,\n  // during componentDidUpdate we pass the \"current\" props.\n  // In order to support react-lifecycles-compat polyfilled components,\n  // Unsafe lifecycles should not be invoked for components using the new APIs.\n\n  if (!hasNewLifecycles && (typeof instance.UNSAFE_componentWillReceiveProps === 'function' || typeof instance.componentWillReceiveProps === 'function')) {\n    if (oldProps !== newProps || oldContext !== nextContext) {\n      callComponentWillReceiveProps(workInProgress, instance, newProps, nextContext);\n    }\n  }\n\n  resetHasForceUpdateBeforeProcessing();\n  var oldState = workInProgress.memoizedState;\n  var newState = instance.state = oldState;\n  processUpdateQueue(workInProgress, newProps, instance, renderLanes);\n  newState = workInProgress.memoizedState;\n\n  if (oldProps === newProps && oldState === newState && !hasContextChanged() && !checkHasForceUpdateAfterProcessing()) {\n    // If an update was already in progress, we should schedule an Update\n    // effect even though we're bailing out, so that cWU/cDU are called.\n    if (typeof instance.componentDidMount === 'function') {\n      workInProgress.flags |= Update;\n    }\n\n    return false;\n  }\n\n  if (typeof getDerivedStateFromProps === 'function') {\n    applyDerivedStateFromProps(workInProgress, ctor, getDerivedStateFromProps, newProps);\n    newState = workInProgress.memoizedState;\n  }\n\n  var shouldUpdate = checkHasForceUpdateAfterProcessing() || checkShouldComponentUpdate(workInProgress, ctor, oldProps, newProps, oldState, newState, nextContext);\n\n  if (shouldUpdate) {\n    // In order to support react-lifecycles-compat polyfilled components,\n    // Unsafe lifecycles should not be invoked for components using the new APIs.\n    if (!hasNewLifecycles && (typeof instance.UNSAFE_componentWillMount === 'function' || typeof instance.componentWillMount === 'function')) {\n      if (typeof instance.componentWillMount === 'function') {\n        instance.componentWillMount();\n      }\n\n      if (typeof instance.UNSAFE_componentWillMount === 'function') {\n        instance.UNSAFE_componentWillMount();\n      }\n    }\n\n    if (typeof instance.componentDidMount === 'function') {\n      workInProgress.flags |= Update;\n    }\n  } else {\n    // If an update was already in progress, we should schedule an Update\n    // effect even though we're bailing out, so that cWU/cDU are called.\n    if (typeof instance.componentDidMount === 'function') {\n      workInProgress.flags |= Update;\n    } // If shouldComponentUpdate returned false, we should still update the\n    // memoized state to indicate that this work can be reused.\n\n\n    workInProgress.memoizedProps = newProps;\n    workInProgress.memoizedState = newState;\n  } // Update the existing instance's state, props, and context pointers even\n  // if shouldComponentUpdate returns false.\n\n\n  instance.props = newProps;\n  instance.state = newState;\n  instance.context = nextContext;\n  return shouldUpdate;\n} // Invokes the update life-cycles and returns false if it shouldn't rerender.\n\n\nfunction updateClassInstance(current, workInProgress, ctor, newProps, renderLanes) {\n  var instance = workInProgress.stateNode;\n  cloneUpdateQueue(current, workInProgress);\n  var unresolvedOldProps = workInProgress.memoizedProps;\n  var oldProps = workInProgress.type === workInProgress.elementType ? unresolvedOldProps : resolveDefaultProps(workInProgress.type, unresolvedOldProps);\n  instance.props = oldProps;\n  var unresolvedNewProps = workInProgress.pendingProps;\n  var oldContext = instance.context;\n  var contextType = ctor.contextType;\n  var nextContext = emptyContextObject;\n\n  if (typeof contextType === 'object' && contextType !== null) {\n    nextContext = readContext(contextType);\n  } else {\n    var nextUnmaskedContext = getUnmaskedContext(workInProgress, ctor, true);\n    nextContext = getMaskedContext(workInProgress, nextUnmaskedContext);\n  }\n\n  var getDerivedStateFromProps = ctor.getDerivedStateFromProps;\n  var hasNewLifecycles = typeof getDerivedStateFromProps === 'function' || typeof instance.getSnapshotBeforeUpdate === 'function'; // Note: During these life-cycles, instance.props/instance.state are what\n  // ever the previously attempted to render - not the \"current\". However,\n  // during componentDidUpdate we pass the \"current\" props.\n  // In order to support react-lifecycles-compat polyfilled components,\n  // Unsafe lifecycles should not be invoked for components using the new APIs.\n\n  if (!hasNewLifecycles && (typeof instance.UNSAFE_componentWillReceiveProps === 'function' || typeof instance.componentWillReceiveProps === 'function')) {\n    if (unresolvedOldProps !== unresolvedNewProps || oldContext !== nextContext) {\n      callComponentWillReceiveProps(workInProgress, instance, newProps, nextContext);\n    }\n  }\n\n  resetHasForceUpdateBeforeProcessing();\n  var oldState = workInProgress.memoizedState;\n  var newState = instance.state = oldState;\n  processUpdateQueue(workInProgress, newProps, instance, renderLanes);\n  newState = workInProgress.memoizedState;\n\n  if (unresolvedOldProps === unresolvedNewProps && oldState === newState && !hasContextChanged() && !checkHasForceUpdateAfterProcessing()) {\n    // If an update was already in progress, we should schedule an Update\n    // effect even though we're bailing out, so that cWU/cDU are called.\n    if (typeof instance.componentDidUpdate === 'function') {\n      if (unresolvedOldProps !== current.memoizedProps || oldState !== current.memoizedState) {\n        workInProgress.flags |= Update;\n      }\n    }\n\n    if (typeof instance.getSnapshotBeforeUpdate === 'function') {\n      if (unresolvedOldProps !== current.memoizedProps || oldState !== current.memoizedState) {\n        workInProgress.flags |= Snapshot;\n      }\n    }\n\n    return false;\n  }\n\n  if (typeof getDerivedStateFromProps === 'function') {\n    applyDerivedStateFromProps(workInProgress, ctor, getDerivedStateFromProps, newProps);\n    newState = workInProgress.memoizedState;\n  }\n\n  var shouldUpdate = checkHasForceUpdateAfterProcessing() || checkShouldComponentUpdate(workInProgress, ctor, oldProps, newProps, oldState, newState, nextContext);\n\n  if (shouldUpdate) {\n    // In order to support react-lifecycles-compat polyfilled components,\n    // Unsafe lifecycles should not be invoked for components using the new APIs.\n    if (!hasNewLifecycles && (typeof instance.UNSAFE_componentWillUpdate === 'function' || typeof instance.componentWillUpdate === 'function')) {\n      if (typeof instance.componentWillUpdate === 'function') {\n        instance.componentWillUpdate(newProps, newState, nextContext);\n      }\n\n      if (typeof instance.UNSAFE_componentWillUpdate === 'function') {\n        instance.UNSAFE_componentWillUpdate(newProps, newState, nextContext);\n      }\n    }\n\n    if (typeof instance.componentDidUpdate === 'function') {\n      workInProgress.flags |= Update;\n    }\n\n    if (typeof instance.getSnapshotBeforeUpdate === 'function') {\n      workInProgress.flags |= Snapshot;\n    }\n  } else {\n    // If an update was already in progress, we should schedule an Update\n    // effect even though we're bailing out, so that cWU/cDU are called.\n    if (typeof instance.componentDidUpdate === 'function') {\n      if (unresolvedOldProps !== current.memoizedProps || oldState !== current.memoizedState) {\n        workInProgress.flags |= Update;\n      }\n    }\n\n    if (typeof instance.getSnapshotBeforeUpdate === 'function') {\n      if (unresolvedOldProps !== current.memoizedProps || oldState !== current.memoizedState) {\n        workInProgress.flags |= Snapshot;\n      }\n    } // If shouldComponentUpdate returned false, we should still update the\n    // memoized props/state to indicate that this work can be reused.\n\n\n    workInProgress.memoizedProps = newProps;\n    workInProgress.memoizedState = newState;\n  } // Update the existing instance's state, props, and context pointers even\n  // if shouldComponentUpdate returns false.\n\n\n  instance.props = newProps;\n  instance.state = newState;\n  instance.context = nextContext;\n  return shouldUpdate;\n}\n\nvar didWarnAboutMaps;\nvar didWarnAboutGenerators;\nvar didWarnAboutStringRefs;\nvar ownerHasKeyUseWarning;\nvar ownerHasFunctionTypeWarning;\n\nvar warnForMissingKey = function (child, returnFiber) {};\n\n{\n  didWarnAboutMaps = false;\n  didWarnAboutGenerators = false;\n  didWarnAboutStringRefs = {};\n  /**\n   * Warn if there's no key explicitly set on dynamic arrays of children or\n   * object keys are not valid. This allows us to keep track of children between\n   * updates.\n   */\n\n  ownerHasKeyUseWarning = {};\n  ownerHasFunctionTypeWarning = {};\n\n  warnForMissingKey = function (child, returnFiber) {\n    if (child === null || typeof child !== 'object') {\n      return;\n    }\n\n    if (!child._store || child._store.validated || child.key != null) {\n      return;\n    }\n\n    if (!(typeof child._store === 'object')) {\n      {\n        throw Error( \"React Component in warnForMissingKey should have a _store. This error is likely caused by a bug in React. Please file an issue.\" );\n      }\n    }\n\n    child._store.validated = true;\n    var componentName = getComponentName(returnFiber.type) || 'Component';\n\n    if (ownerHasKeyUseWarning[componentName]) {\n      return;\n    }\n\n    ownerHasKeyUseWarning[componentName] = true;\n\n    error('Each child in a list should have a unique ' + '\"key\" prop. See https://reactjs.org/link/warning-keys for ' + 'more information.');\n  };\n}\n\nvar isArray$1 = Array.isArray;\n\nfunction coerceRef(returnFiber, current, element) {\n  var mixedRef = element.ref;\n\n  if (mixedRef !== null && typeof mixedRef !== 'function' && typeof mixedRef !== 'object') {\n    {\n      // TODO: Clean this up once we turn on the string ref warning for\n      // everyone, because the strict mode case will no longer be relevant\n      if ((returnFiber.mode & StrictMode || warnAboutStringRefs) && // We warn in ReactElement.js if owner and self are equal for string refs\n      // because these cannot be automatically converted to an arrow function\n      // using a codemod. Therefore, we don't have to warn about string refs again.\n      !(element._owner && element._self && element._owner.stateNode !== element._self)) {\n        var componentName = getComponentName(returnFiber.type) || 'Component';\n\n        if (!didWarnAboutStringRefs[componentName]) {\n          {\n            error('A string ref, \"%s\", has been found within a strict mode tree. ' + 'String refs are a source of potential bugs and should be avoided. ' + 'We recommend using useRef() or createRef() instead. ' + 'Learn more about using refs safely here: ' + 'https://reactjs.org/link/strict-mode-string-ref', mixedRef);\n          }\n\n          didWarnAboutStringRefs[componentName] = true;\n        }\n      }\n    }\n\n    if (element._owner) {\n      var owner = element._owner;\n      var inst;\n\n      if (owner) {\n        var ownerFiber = owner;\n\n        if (!(ownerFiber.tag === ClassComponent)) {\n          {\n            throw Error( \"Function components cannot have string refs. We recommend using useRef() instead. Learn more about using refs safely here: https://reactjs.org/link/strict-mode-string-ref\" );\n          }\n        }\n\n        inst = ownerFiber.stateNode;\n      }\n\n      if (!inst) {\n        {\n          throw Error( \"Missing owner for string ref \" + mixedRef + \". This error is likely caused by a bug in React. Please file an issue.\" );\n        }\n      }\n\n      var stringRef = '' + mixedRef; // Check if previous string ref matches new string ref\n\n      if (current !== null && current.ref !== null && typeof current.ref === 'function' && current.ref._stringRef === stringRef) {\n        return current.ref;\n      }\n\n      var ref = function (value) {\n        var refs = inst.refs;\n\n        if (refs === emptyRefsObject) {\n          // This is a lazy pooled frozen object, so we need to initialize.\n          refs = inst.refs = {};\n        }\n\n        if (value === null) {\n          delete refs[stringRef];\n        } else {\n          refs[stringRef] = value;\n        }\n      };\n\n      ref._stringRef = stringRef;\n      return ref;\n    } else {\n      if (!(typeof mixedRef === 'string')) {\n        {\n          throw Error( \"Expected ref to be a function, a string, an object returned by React.createRef(), or null.\" );\n        }\n      }\n\n      if (!element._owner) {\n        {\n          throw Error( \"Element ref was specified as a string (\" + mixedRef + \") but no owner was set. This could happen for one of the following reasons:\\n1. You may be adding a ref to a function component\\n2. You may be adding a ref to a component that was not created inside a component's render method\\n3. You have multiple copies of React loaded\\nSee https://reactjs.org/link/refs-must-have-owner for more information.\" );\n        }\n      }\n    }\n  }\n\n  return mixedRef;\n}\n\nfunction throwOnInvalidObjectType(returnFiber, newChild) {\n  if (returnFiber.type !== 'textarea') {\n    {\n      {\n        throw Error( \"Objects are not valid as a React child (found: \" + (Object.prototype.toString.call(newChild) === '[object Object]' ? 'object with keys {' + Object.keys(newChild).join(', ') + '}' : newChild) + \"). If you meant to render a collection of children, use an array instead.\" );\n      }\n    }\n  }\n}\n\nfunction warnOnFunctionType(returnFiber) {\n  {\n    var componentName = getComponentName(returnFiber.type) || 'Component';\n\n    if (ownerHasFunctionTypeWarning[componentName]) {\n      return;\n    }\n\n    ownerHasFunctionTypeWarning[componentName] = true;\n\n    error('Functions are not valid as a React child. This may happen if ' + 'you return a Component instead of <Component /> from render. ' + 'Or maybe you meant to call this function rather than return it.');\n  }\n} // We avoid inlining this to avoid potential deopts from using try/catch.\n// to be able to optimize each path individually by branching early. This needs\n// a compiler or we can do it manually. Helpers that don't need this branching\n// live outside of this function.\n\n\nfunction ChildReconciler(shouldTrackSideEffects) {\n  function deleteChild(returnFiber, childToDelete) {\n    if (!shouldTrackSideEffects) {\n      // Noop.\n      return;\n    } // Deletions are added in reversed order so we add it to the front.\n    // At this point, the return fiber's effect list is empty except for\n    // deletions, so we can just append the deletion to the list. The remaining\n    // effects aren't added until the complete phase. Once we implement\n    // resuming, this may not be true.\n\n\n    var last = returnFiber.lastEffect;\n\n    if (last !== null) {\n      last.nextEffect = childToDelete;\n      returnFiber.lastEffect = childToDelete;\n    } else {\n      returnFiber.firstEffect = returnFiber.lastEffect = childToDelete;\n    }\n\n    childToDelete.nextEffect = null;\n    childToDelete.flags = Deletion;\n  }\n\n  function deleteRemainingChildren(returnFiber, currentFirstChild) {\n    if (!shouldTrackSideEffects) {\n      // Noop.\n      return null;\n    } // TODO: For the shouldClone case, this could be micro-optimized a bit by\n    // assuming that after the first child we've already added everything.\n\n\n    var childToDelete = currentFirstChild;\n\n    while (childToDelete !== null) {\n      deleteChild(returnFiber, childToDelete);\n      childToDelete = childToDelete.sibling;\n    }\n\n    return null;\n  }\n\n  function mapRemainingChildren(returnFiber, currentFirstChild) {\n    // Add the remaining children to a temporary map so that we can find them by\n    // keys quickly. Implicit (null) keys get added to this set with their index\n    // instead.\n    var existingChildren = new Map();\n    var existingChild = currentFirstChild;\n\n    while (existingChild !== null) {\n      if (existingChild.key !== null) {\n        existingChildren.set(existingChild.key, existingChild);\n      } else {\n        existingChildren.set(existingChild.index, existingChild);\n      }\n\n      existingChild = existingChild.sibling;\n    }\n\n    return existingChildren;\n  }\n\n  function useFiber(fiber, pendingProps) {\n    // We currently set sibling to null and index to 0 here because it is easy\n    // to forget to do before returning it. E.g. for the single child case.\n    var clone = createWorkInProgress(fiber, pendingProps);\n    clone.index = 0;\n    clone.sibling = null;\n    return clone;\n  }\n\n  function placeChild(newFiber, lastPlacedIndex, newIndex) {\n    newFiber.index = newIndex;\n\n    if (!shouldTrackSideEffects) {\n      // Noop.\n      return lastPlacedIndex;\n    }\n\n    var current = newFiber.alternate;\n\n    if (current !== null) {\n      var oldIndex = current.index;\n\n      if (oldIndex < lastPlacedIndex) {\n        // This is a move.\n        newFiber.flags = Placement;\n        return lastPlacedIndex;\n      } else {\n        // This item can stay in place.\n        return oldIndex;\n      }\n    } else {\n      // This is an insertion.\n      newFiber.flags = Placement;\n      return lastPlacedIndex;\n    }\n  }\n\n  function placeSingleChild(newFiber) {\n    // This is simpler for the single child case. We only need to do a\n    // placement for inserting new children.\n    if (shouldTrackSideEffects && newFiber.alternate === null) {\n      newFiber.flags = Placement;\n    }\n\n    return newFiber;\n  }\n\n  function updateTextNode(returnFiber, current, textContent, lanes) {\n    if (current === null || current.tag !== HostText) {\n      // Insert\n      var created = createFiberFromText(textContent, returnFiber.mode, lanes);\n      created.return = returnFiber;\n      return created;\n    } else {\n      // Update\n      var existing = useFiber(current, textContent);\n      existing.return = returnFiber;\n      return existing;\n    }\n  }\n\n  function updateElement(returnFiber, current, element, lanes) {\n    if (current !== null) {\n      if (current.elementType === element.type || ( // Keep this check inline so it only runs on the false path:\n       isCompatibleFamilyForHotReloading(current, element) )) {\n        // Move based on index\n        var existing = useFiber(current, element.props);\n        existing.ref = coerceRef(returnFiber, current, element);\n        existing.return = returnFiber;\n\n        {\n          existing._debugSource = element._source;\n          existing._debugOwner = element._owner;\n        }\n\n        return existing;\n      }\n    } // Insert\n\n\n    var created = createFiberFromElement(element, returnFiber.mode, lanes);\n    created.ref = coerceRef(returnFiber, current, element);\n    created.return = returnFiber;\n    return created;\n  }\n\n  function updatePortal(returnFiber, current, portal, lanes) {\n    if (current === null || current.tag !== HostPortal || current.stateNode.containerInfo !== portal.containerInfo || current.stateNode.implementation !== portal.implementation) {\n      // Insert\n      var created = createFiberFromPortal(portal, returnFiber.mode, lanes);\n      created.return = returnFiber;\n      return created;\n    } else {\n      // Update\n      var existing = useFiber(current, portal.children || []);\n      existing.return = returnFiber;\n      return existing;\n    }\n  }\n\n  function updateFragment(returnFiber, current, fragment, lanes, key) {\n    if (current === null || current.tag !== Fragment) {\n      // Insert\n      var created = createFiberFromFragment(fragment, returnFiber.mode, lanes, key);\n      created.return = returnFiber;\n      return created;\n    } else {\n      // Update\n      var existing = useFiber(current, fragment);\n      existing.return = returnFiber;\n      return existing;\n    }\n  }\n\n  function createChild(returnFiber, newChild, lanes) {\n    if (typeof newChild === 'string' || typeof newChild === 'number') {\n      // Text nodes don't have keys. If the previous node is implicitly keyed\n      // we can continue to replace it without aborting even if it is not a text\n      // node.\n      var created = createFiberFromText('' + newChild, returnFiber.mode, lanes);\n      created.return = returnFiber;\n      return created;\n    }\n\n    if (typeof newChild === 'object' && newChild !== null) {\n      switch (newChild.$$typeof) {\n        case REACT_ELEMENT_TYPE:\n          {\n            var _created = createFiberFromElement(newChild, returnFiber.mode, lanes);\n\n            _created.ref = coerceRef(returnFiber, null, newChild);\n            _created.return = returnFiber;\n            return _created;\n          }\n\n        case REACT_PORTAL_TYPE:\n          {\n            var _created2 = createFiberFromPortal(newChild, returnFiber.mode, lanes);\n\n            _created2.return = returnFiber;\n            return _created2;\n          }\n      }\n\n      if (isArray$1(newChild) || getIteratorFn(newChild)) {\n        var _created3 = createFiberFromFragment(newChild, returnFiber.mode, lanes, null);\n\n        _created3.return = returnFiber;\n        return _created3;\n      }\n\n      throwOnInvalidObjectType(returnFiber, newChild);\n    }\n\n    {\n      if (typeof newChild === 'function') {\n        warnOnFunctionType(returnFiber);\n      }\n    }\n\n    return null;\n  }\n\n  function updateSlot(returnFiber, oldFiber, newChild, lanes) {\n    // Update the fiber if the keys match, otherwise return null.\n    var key = oldFiber !== null ? oldFiber.key : null;\n\n    if (typeof newChild === 'string' || typeof newChild === 'number') {\n      // Text nodes don't have keys. If the previous node is implicitly keyed\n      // we can continue to replace it without aborting even if it is not a text\n      // node.\n      if (key !== null) {\n        return null;\n      }\n\n      return updateTextNode(returnFiber, oldFiber, '' + newChild, lanes);\n    }\n\n    if (typeof newChild === 'object' && newChild !== null) {\n      switch (newChild.$$typeof) {\n        case REACT_ELEMENT_TYPE:\n          {\n            if (newChild.key === key) {\n              if (newChild.type === REACT_FRAGMENT_TYPE) {\n                return updateFragment(returnFiber, oldFiber, newChild.props.children, lanes, key);\n              }\n\n              return updateElement(returnFiber, oldFiber, newChild, lanes);\n            } else {\n              return null;\n            }\n          }\n\n        case REACT_PORTAL_TYPE:\n          {\n            if (newChild.key === key) {\n              return updatePortal(returnFiber, oldFiber, newChild, lanes);\n            } else {\n              return null;\n            }\n          }\n      }\n\n      if (isArray$1(newChild) || getIteratorFn(newChild)) {\n        if (key !== null) {\n          return null;\n        }\n\n        return updateFragment(returnFiber, oldFiber, newChild, lanes, null);\n      }\n\n      throwOnInvalidObjectType(returnFiber, newChild);\n    }\n\n    {\n      if (typeof newChild === 'function') {\n        warnOnFunctionType(returnFiber);\n      }\n    }\n\n    return null;\n  }\n\n  function updateFromMap(existingChildren, returnFiber, newIdx, newChild, lanes) {\n    if (typeof newChild === 'string' || typeof newChild === 'number') {\n      // Text nodes don't have keys, so we neither have to check the old nor\n      // new node for the key. If both are text nodes, they match.\n      var matchedFiber = existingChildren.get(newIdx) || null;\n      return updateTextNode(returnFiber, matchedFiber, '' + newChild, lanes);\n    }\n\n    if (typeof newChild === 'object' && newChild !== null) {\n      switch (newChild.$$typeof) {\n        case REACT_ELEMENT_TYPE:\n          {\n            var _matchedFiber = existingChildren.get(newChild.key === null ? newIdx : newChild.key) || null;\n\n            if (newChild.type === REACT_FRAGMENT_TYPE) {\n              return updateFragment(returnFiber, _matchedFiber, newChild.props.children, lanes, newChild.key);\n            }\n\n            return updateElement(returnFiber, _matchedFiber, newChild, lanes);\n          }\n\n        case REACT_PORTAL_TYPE:\n          {\n            var _matchedFiber2 = existingChildren.get(newChild.key === null ? newIdx : newChild.key) || null;\n\n            return updatePortal(returnFiber, _matchedFiber2, newChild, lanes);\n          }\n\n      }\n\n      if (isArray$1(newChild) || getIteratorFn(newChild)) {\n        var _matchedFiber3 = existingChildren.get(newIdx) || null;\n\n        return updateFragment(returnFiber, _matchedFiber3, newChild, lanes, null);\n      }\n\n      throwOnInvalidObjectType(returnFiber, newChild);\n    }\n\n    {\n      if (typeof newChild === 'function') {\n        warnOnFunctionType(returnFiber);\n      }\n    }\n\n    return null;\n  }\n  /**\n   * Warns if there is a duplicate or missing key\n   */\n\n\n  function warnOnInvalidKey(child, knownKeys, returnFiber) {\n    {\n      if (typeof child !== 'object' || child === null) {\n        return knownKeys;\n      }\n\n      switch (child.$$typeof) {\n        case REACT_ELEMENT_TYPE:\n        case REACT_PORTAL_TYPE:\n          warnForMissingKey(child, returnFiber);\n          var key = child.key;\n\n          if (typeof key !== 'string') {\n            break;\n          }\n\n          if (knownKeys === null) {\n            knownKeys = new Set();\n            knownKeys.add(key);\n            break;\n          }\n\n          if (!knownKeys.has(key)) {\n            knownKeys.add(key);\n            break;\n          }\n\n          error('Encountered two children with the same key, `%s`. ' + 'Keys should be unique so that components maintain their identity ' + 'across updates. Non-unique keys may cause children to be ' + 'duplicated and/or omitted — the behavior is unsupported and ' + 'could change in a future version.', key);\n\n          break;\n      }\n    }\n\n    return knownKeys;\n  }\n\n  function reconcileChildrenArray(returnFiber, currentFirstChild, newChildren, lanes) {\n    // This algorithm can't optimize by searching from both ends since we\n    // don't have backpointers on fibers. I'm trying to see how far we can get\n    // with that model. If it ends up not being worth the tradeoffs, we can\n    // add it later.\n    // Even with a two ended optimization, we'd want to optimize for the case\n    // where there are few changes and brute force the comparison instead of\n    // going for the Map. It'd like to explore hitting that path first in\n    // forward-only mode and only go for the Map once we notice that we need\n    // lots of look ahead. This doesn't handle reversal as well as two ended\n    // search but that's unusual. Besides, for the two ended optimization to\n    // work on Iterables, we'd need to copy the whole set.\n    // In this first iteration, we'll just live with hitting the bad case\n    // (adding everything to a Map) in for every insert/move.\n    // If you change this code, also update reconcileChildrenIterator() which\n    // uses the same algorithm.\n    {\n      // First, validate keys.\n      var knownKeys = null;\n\n      for (var i = 0; i < newChildren.length; i++) {\n        var child = newChildren[i];\n        knownKeys = warnOnInvalidKey(child, knownKeys, returnFiber);\n      }\n    }\n\n    var resultingFirstChild = null;\n    var previousNewFiber = null;\n    var oldFiber = currentFirstChild;\n    var lastPlacedIndex = 0;\n    var newIdx = 0;\n    var nextOldFiber = null;\n\n    for (; oldFiber !== null && newIdx < newChildren.length; newIdx++) {\n      if (oldFiber.index > newIdx) {\n        nextOldFiber = oldFiber;\n        oldFiber = null;\n      } else {\n        nextOldFiber = oldFiber.sibling;\n      }\n\n      var newFiber = updateSlot(returnFiber, oldFiber, newChildren[newIdx], lanes);\n\n      if (newFiber === null) {\n        // TODO: This breaks on empty slots like null children. That's\n        // unfortunate because it triggers the slow path all the time. We need\n        // a better way to communicate whether this was a miss or null,\n        // boolean, undefined, etc.\n        if (oldFiber === null) {\n          oldFiber = nextOldFiber;\n        }\n\n        break;\n      }\n\n      if (shouldTrackSideEffects) {\n        if (oldFiber && newFiber.alternate === null) {\n          // We matched the slot, but we didn't reuse the existing fiber, so we\n          // need to delete the existing child.\n          deleteChild(returnFiber, oldFiber);\n        }\n      }\n\n      lastPlacedIndex = placeChild(newFiber, lastPlacedIndex, newIdx);\n\n      if (previousNewFiber === null) {\n        // TODO: Move out of the loop. This only happens for the first run.\n        resultingFirstChild = newFiber;\n      } else {\n        // TODO: Defer siblings if we're not at the right index for this slot.\n        // I.e. if we had null values before, then we want to defer this\n        // for each null value. However, we also don't want to call updateSlot\n        // with the previous one.\n        previousNewFiber.sibling = newFiber;\n      }\n\n      previousNewFiber = newFiber;\n      oldFiber = nextOldFiber;\n    }\n\n    if (newIdx === newChildren.length) {\n      // We've reached the end of the new children. We can delete the rest.\n      deleteRemainingChildren(returnFiber, oldFiber);\n      return resultingFirstChild;\n    }\n\n    if (oldFiber === null) {\n      // If we don't have any more existing children we can choose a fast path\n      // since the rest will all be insertions.\n      for (; newIdx < newChildren.length; newIdx++) {\n        var _newFiber = createChild(returnFiber, newChildren[newIdx], lanes);\n\n        if (_newFiber === null) {\n          continue;\n        }\n\n        lastPlacedIndex = placeChild(_newFiber, lastPlacedIndex, newIdx);\n\n        if (previousNewFiber === null) {\n          // TODO: Move out of the loop. This only happens for the first run.\n          resultingFirstChild = _newFiber;\n        } else {\n          previousNewFiber.sibling = _newFiber;\n        }\n\n        previousNewFiber = _newFiber;\n      }\n\n      return resultingFirstChild;\n    } // Add all children to a key map for quick lookups.\n\n\n    var existingChildren = mapRemainingChildren(returnFiber, oldFiber); // Keep scanning and use the map to restore deleted items as moves.\n\n    for (; newIdx < newChildren.length; newIdx++) {\n      var _newFiber2 = updateFromMap(existingChildren, returnFiber, newIdx, newChildren[newIdx], lanes);\n\n      if (_newFiber2 !== null) {\n        if (shouldTrackSideEffects) {\n          if (_newFiber2.alternate !== null) {\n            // The new fiber is a work in progress, but if there exists a\n            // current, that means that we reused the fiber. We need to delete\n            // it from the child list so that we don't add it to the deletion\n            // list.\n            existingChildren.delete(_newFiber2.key === null ? newIdx : _newFiber2.key);\n          }\n        }\n\n        lastPlacedIndex = placeChild(_newFiber2, lastPlacedIndex, newIdx);\n\n        if (previousNewFiber === null) {\n          resultingFirstChild = _newFiber2;\n        } else {\n          previousNewFiber.sibling = _newFiber2;\n        }\n\n        previousNewFiber = _newFiber2;\n      }\n    }\n\n    if (shouldTrackSideEffects) {\n      // Any existing children that weren't consumed above were deleted. We need\n      // to add them to the deletion list.\n      existingChildren.forEach(function (child) {\n        return deleteChild(returnFiber, child);\n      });\n    }\n\n    return resultingFirstChild;\n  }\n\n  function reconcileChildrenIterator(returnFiber, currentFirstChild, newChildrenIterable, lanes) {\n    // This is the same implementation as reconcileChildrenArray(),\n    // but using the iterator instead.\n    var iteratorFn = getIteratorFn(newChildrenIterable);\n\n    if (!(typeof iteratorFn === 'function')) {\n      {\n        throw Error( \"An object is not an iterable. This error is likely caused by a bug in React. Please file an issue.\" );\n      }\n    }\n\n    {\n      // We don't support rendering Generators because it's a mutation.\n      // See https://github.com/facebook/react/issues/12995\n      if (typeof Symbol === 'function' && // $FlowFixMe Flow doesn't know about toStringTag\n      newChildrenIterable[Symbol.toStringTag] === 'Generator') {\n        if (!didWarnAboutGenerators) {\n          error('Using Generators as children is unsupported and will likely yield ' + 'unexpected results because enumerating a generator mutates it. ' + 'You may convert it to an array with `Array.from()` or the ' + '`[...spread]` operator before rendering. Keep in mind ' + 'you might need to polyfill these features for older browsers.');\n        }\n\n        didWarnAboutGenerators = true;\n      } // Warn about using Maps as children\n\n\n      if (newChildrenIterable.entries === iteratorFn) {\n        if (!didWarnAboutMaps) {\n          error('Using Maps as children is not supported. ' + 'Use an array of keyed ReactElements instead.');\n        }\n\n        didWarnAboutMaps = true;\n      } // First, validate keys.\n      // We'll get a different iterator later for the main pass.\n\n\n      var _newChildren = iteratorFn.call(newChildrenIterable);\n\n      if (_newChildren) {\n        var knownKeys = null;\n\n        var _step = _newChildren.next();\n\n        for (; !_step.done; _step = _newChildren.next()) {\n          var child = _step.value;\n          knownKeys = warnOnInvalidKey(child, knownKeys, returnFiber);\n        }\n      }\n    }\n\n    var newChildren = iteratorFn.call(newChildrenIterable);\n\n    if (!(newChildren != null)) {\n      {\n        throw Error( \"An iterable object provided no iterator.\" );\n      }\n    }\n\n    var resultingFirstChild = null;\n    var previousNewFiber = null;\n    var oldFiber = currentFirstChild;\n    var lastPlacedIndex = 0;\n    var newIdx = 0;\n    var nextOldFiber = null;\n    var step = newChildren.next();\n\n    for (; oldFiber !== null && !step.done; newIdx++, step = newChildren.next()) {\n      if (oldFiber.index > newIdx) {\n        nextOldFiber = oldFiber;\n        oldFiber = null;\n      } else {\n        nextOldFiber = oldFiber.sibling;\n      }\n\n      var newFiber = updateSlot(returnFiber, oldFiber, step.value, lanes);\n\n      if (newFiber === null) {\n        // TODO: This breaks on empty slots like null children. That's\n        // unfortunate because it triggers the slow path all the time. We need\n        // a better way to communicate whether this was a miss or null,\n        // boolean, undefined, etc.\n        if (oldFiber === null) {\n          oldFiber = nextOldFiber;\n        }\n\n        break;\n      }\n\n      if (shouldTrackSideEffects) {\n        if (oldFiber && newFiber.alternate === null) {\n          // We matched the slot, but we didn't reuse the existing fiber, so we\n          // need to delete the existing child.\n          deleteChild(returnFiber, oldFiber);\n        }\n      }\n\n      lastPlacedIndex = placeChild(newFiber, lastPlacedIndex, newIdx);\n\n      if (previousNewFiber === null) {\n        // TODO: Move out of the loop. This only happens for the first run.\n        resultingFirstChild = newFiber;\n      } else {\n        // TODO: Defer siblings if we're not at the right index for this slot.\n        // I.e. if we had null values before, then we want to defer this\n        // for each null value. However, we also don't want to call updateSlot\n        // with the previous one.\n        previousNewFiber.sibling = newFiber;\n      }\n\n      previousNewFiber = newFiber;\n      oldFiber = nextOldFiber;\n    }\n\n    if (step.done) {\n      // We've reached the end of the new children. We can delete the rest.\n      deleteRemainingChildren(returnFiber, oldFiber);\n      return resultingFirstChild;\n    }\n\n    if (oldFiber === null) {\n      // If we don't have any more existing children we can choose a fast path\n      // since the rest will all be insertions.\n      for (; !step.done; newIdx++, step = newChildren.next()) {\n        var _newFiber3 = createChild(returnFiber, step.value, lanes);\n\n        if (_newFiber3 === null) {\n          continue;\n        }\n\n        lastPlacedIndex = placeChild(_newFiber3, lastPlacedIndex, newIdx);\n\n        if (previousNewFiber === null) {\n          // TODO: Move out of the loop. This only happens for the first run.\n          resultingFirstChild = _newFiber3;\n        } else {\n          previousNewFiber.sibling = _newFiber3;\n        }\n\n        previousNewFiber = _newFiber3;\n      }\n\n      return resultingFirstChild;\n    } // Add all children to a key map for quick lookups.\n\n\n    var existingChildren = mapRemainingChildren(returnFiber, oldFiber); // Keep scanning and use the map to restore deleted items as moves.\n\n    for (; !step.done; newIdx++, step = newChildren.next()) {\n      var _newFiber4 = updateFromMap(existingChildren, returnFiber, newIdx, step.value, lanes);\n\n      if (_newFiber4 !== null) {\n        if (shouldTrackSideEffects) {\n          if (_newFiber4.alternate !== null) {\n            // The new fiber is a work in progress, but if there exists a\n            // current, that means that we reused the fiber. We need to delete\n            // it from the child list so that we don't add it to the deletion\n            // list.\n            existingChildren.delete(_newFiber4.key === null ? newIdx : _newFiber4.key);\n          }\n        }\n\n        lastPlacedIndex = placeChild(_newFiber4, lastPlacedIndex, newIdx);\n\n        if (previousNewFiber === null) {\n          resultingFirstChild = _newFiber4;\n        } else {\n          previousNewFiber.sibling = _newFiber4;\n        }\n\n        previousNewFiber = _newFiber4;\n      }\n    }\n\n    if (shouldTrackSideEffects) {\n      // Any existing children that weren't consumed above were deleted. We need\n      // to add them to the deletion list.\n      existingChildren.forEach(function (child) {\n        return deleteChild(returnFiber, child);\n      });\n    }\n\n    return resultingFirstChild;\n  }\n\n  function reconcileSingleTextNode(returnFiber, currentFirstChild, textContent, lanes) {\n    // There's no need to check for keys on text nodes since we don't have a\n    // way to define them.\n    if (currentFirstChild !== null && currentFirstChild.tag === HostText) {\n      // We already have an existing node so let's just update it and delete\n      // the rest.\n      deleteRemainingChildren(returnFiber, currentFirstChild.sibling);\n      var existing = useFiber(currentFirstChild, textContent);\n      existing.return = returnFiber;\n      return existing;\n    } // The existing first child is not a text node so we need to create one\n    // and delete the existing ones.\n\n\n    deleteRemainingChildren(returnFiber, currentFirstChild);\n    var created = createFiberFromText(textContent, returnFiber.mode, lanes);\n    created.return = returnFiber;\n    return created;\n  }\n\n  function reconcileSingleElement(returnFiber, currentFirstChild, element, lanes) {\n    var key = element.key;\n    var child = currentFirstChild;\n\n    while (child !== null) {\n      // TODO: If key === null and child.key === null, then this only applies to\n      // the first item in the list.\n      if (child.key === key) {\n        switch (child.tag) {\n          case Fragment:\n            {\n              if (element.type === REACT_FRAGMENT_TYPE) {\n                deleteRemainingChildren(returnFiber, child.sibling);\n                var existing = useFiber(child, element.props.children);\n                existing.return = returnFiber;\n\n                {\n                  existing._debugSource = element._source;\n                  existing._debugOwner = element._owner;\n                }\n\n                return existing;\n              }\n\n              break;\n            }\n\n          case Block:\n\n          // We intentionally fallthrough here if enableBlocksAPI is not on.\n          // eslint-disable-next-lined no-fallthrough\n\n          default:\n            {\n              if (child.elementType === element.type || ( // Keep this check inline so it only runs on the false path:\n               isCompatibleFamilyForHotReloading(child, element) )) {\n                deleteRemainingChildren(returnFiber, child.sibling);\n\n                var _existing3 = useFiber(child, element.props);\n\n                _existing3.ref = coerceRef(returnFiber, child, element);\n                _existing3.return = returnFiber;\n\n                {\n                  _existing3._debugSource = element._source;\n                  _existing3._debugOwner = element._owner;\n                }\n\n                return _existing3;\n              }\n\n              break;\n            }\n        } // Didn't match.\n\n\n        deleteRemainingChildren(returnFiber, child);\n        break;\n      } else {\n        deleteChild(returnFiber, child);\n      }\n\n      child = child.sibling;\n    }\n\n    if (element.type === REACT_FRAGMENT_TYPE) {\n      var created = createFiberFromFragment(element.props.children, returnFiber.mode, lanes, element.key);\n      created.return = returnFiber;\n      return created;\n    } else {\n      var _created4 = createFiberFromElement(element, returnFiber.mode, lanes);\n\n      _created4.ref = coerceRef(returnFiber, currentFirstChild, element);\n      _created4.return = returnFiber;\n      return _created4;\n    }\n  }\n\n  function reconcileSinglePortal(returnFiber, currentFirstChild, portal, lanes) {\n    var key = portal.key;\n    var child = currentFirstChild;\n\n    while (child !== null) {\n      // TODO: If key === null and child.key === null, then this only applies to\n      // the first item in the list.\n      if (child.key === key) {\n        if (child.tag === HostPortal && child.stateNode.containerInfo === portal.containerInfo && child.stateNode.implementation === portal.implementation) {\n          deleteRemainingChildren(returnFiber, child.sibling);\n          var existing = useFiber(child, portal.children || []);\n          existing.return = returnFiber;\n          return existing;\n        } else {\n          deleteRemainingChildren(returnFiber, child);\n          break;\n        }\n      } else {\n        deleteChild(returnFiber, child);\n      }\n\n      child = child.sibling;\n    }\n\n    var created = createFiberFromPortal(portal, returnFiber.mode, lanes);\n    created.return = returnFiber;\n    return created;\n  } // This API will tag the children with the side-effect of the reconciliation\n  // itself. They will be added to the side-effect list as we pass through the\n  // children and the parent.\n\n\n  function reconcileChildFibers(returnFiber, currentFirstChild, newChild, lanes) {\n    // This function is not recursive.\n    // If the top level item is an array, we treat it as a set of children,\n    // not as a fragment. Nested arrays on the other hand will be treated as\n    // fragment nodes. Recursion happens at the normal flow.\n    // Handle top level unkeyed fragments as if they were arrays.\n    // This leads to an ambiguity between <>{[...]}</> and <>...</>.\n    // We treat the ambiguous cases above the same.\n    var isUnkeyedTopLevelFragment = typeof newChild === 'object' && newChild !== null && newChild.type === REACT_FRAGMENT_TYPE && newChild.key === null;\n\n    if (isUnkeyedTopLevelFragment) {\n      newChild = newChild.props.children;\n    } // Handle object types\n\n\n    var isObject = typeof newChild === 'object' && newChild !== null;\n\n    if (isObject) {\n      switch (newChild.$$typeof) {\n        case REACT_ELEMENT_TYPE:\n          return placeSingleChild(reconcileSingleElement(returnFiber, currentFirstChild, newChild, lanes));\n\n        case REACT_PORTAL_TYPE:\n          return placeSingleChild(reconcileSinglePortal(returnFiber, currentFirstChild, newChild, lanes));\n\n      }\n    }\n\n    if (typeof newChild === 'string' || typeof newChild === 'number') {\n      return placeSingleChild(reconcileSingleTextNode(returnFiber, currentFirstChild, '' + newChild, lanes));\n    }\n\n    if (isArray$1(newChild)) {\n      return reconcileChildrenArray(returnFiber, currentFirstChild, newChild, lanes);\n    }\n\n    if (getIteratorFn(newChild)) {\n      return reconcileChildrenIterator(returnFiber, currentFirstChild, newChild, lanes);\n    }\n\n    if (isObject) {\n      throwOnInvalidObjectType(returnFiber, newChild);\n    }\n\n    {\n      if (typeof newChild === 'function') {\n        warnOnFunctionType(returnFiber);\n      }\n    }\n\n    if (typeof newChild === 'undefined' && !isUnkeyedTopLevelFragment) {\n      // If the new child is undefined, and the return fiber is a composite\n      // component, throw an error. If Fiber return types are disabled,\n      // we already threw above.\n      switch (returnFiber.tag) {\n        case ClassComponent:\n          {\n            {\n              var instance = returnFiber.stateNode;\n\n              if (instance.render._isMockFunction) {\n                // We allow auto-mocks to proceed as if they're returning null.\n                break;\n              }\n            }\n          }\n        // Intentionally fall through to the next case, which handles both\n        // functions and classes\n        // eslint-disable-next-lined no-fallthrough\n\n        case Block:\n        case FunctionComponent:\n        case ForwardRef:\n        case SimpleMemoComponent:\n          {\n            {\n              {\n                throw Error( (getComponentName(returnFiber.type) || 'Component') + \"(...): Nothing was returned from render. This usually means a return statement is missing. Or, to render nothing, return null.\" );\n              }\n            }\n          }\n      }\n    } // Remaining cases are all treated as empty.\n\n\n    return deleteRemainingChildren(returnFiber, currentFirstChild);\n  }\n\n  return reconcileChildFibers;\n}\n\nvar reconcileChildFibers = ChildReconciler(true);\nvar mountChildFibers = ChildReconciler(false);\nfunction cloneChildFibers(current, workInProgress) {\n  if (!(current === null || workInProgress.child === current.child)) {\n    {\n      throw Error( \"Resuming work not yet implemented.\" );\n    }\n  }\n\n  if (workInProgress.child === null) {\n    return;\n  }\n\n  var currentChild = workInProgress.child;\n  var newChild = createWorkInProgress(currentChild, currentChild.pendingProps);\n  workInProgress.child = newChild;\n  newChild.return = workInProgress;\n\n  while (currentChild.sibling !== null) {\n    currentChild = currentChild.sibling;\n    newChild = newChild.sibling = createWorkInProgress(currentChild, currentChild.pendingProps);\n    newChild.return = workInProgress;\n  }\n\n  newChild.sibling = null;\n} // Reset a workInProgress child set to prepare it for a second pass.\n\nfunction resetChildFibers(workInProgress, lanes) {\n  var child = workInProgress.child;\n\n  while (child !== null) {\n    resetWorkInProgress(child, lanes);\n    child = child.sibling;\n  }\n}\n\nvar NO_CONTEXT = {};\nvar contextStackCursor$1 = createCursor(NO_CONTEXT);\nvar contextFiberStackCursor = createCursor(NO_CONTEXT);\nvar rootInstanceStackCursor = createCursor(NO_CONTEXT);\n\nfunction requiredContext(c) {\n  if (!(c !== NO_CONTEXT)) {\n    {\n      throw Error( \"Expected host context to exist. This error is likely caused by a bug in React. Please file an issue.\" );\n    }\n  }\n\n  return c;\n}\n\nfunction getRootHostContainer() {\n  var rootInstance = requiredContext(rootInstanceStackCursor.current);\n  return rootInstance;\n}\n\nfunction pushHostContainer(fiber, nextRootInstance) {\n  // Push current root instance onto the stack;\n  // This allows us to reset root when portals are popped.\n  push(rootInstanceStackCursor, nextRootInstance, fiber); // Track the context and the Fiber that provided it.\n  // This enables us to pop only Fibers that provide unique contexts.\n\n  push(contextFiberStackCursor, fiber, fiber); // Finally, we need to push the host context to the stack.\n  // However, we can't just call getRootHostContext() and push it because\n  // we'd have a different number of entries on the stack depending on\n  // whether getRootHostContext() throws somewhere in renderer code or not.\n  // So we push an empty value first. This lets us safely unwind on errors.\n\n  push(contextStackCursor$1, NO_CONTEXT, fiber);\n  var nextRootContext = getRootHostContext(nextRootInstance); // Now that we know this function doesn't throw, replace it.\n\n  pop(contextStackCursor$1, fiber);\n  push(contextStackCursor$1, nextRootContext, fiber);\n}\n\nfunction popHostContainer(fiber) {\n  pop(contextStackCursor$1, fiber);\n  pop(contextFiberStackCursor, fiber);\n  pop(rootInstanceStackCursor, fiber);\n}\n\nfunction getHostContext() {\n  var context = requiredContext(contextStackCursor$1.current);\n  return context;\n}\n\nfunction pushHostContext(fiber) {\n  var rootInstance = requiredContext(rootInstanceStackCursor.current);\n  var context = requiredContext(contextStackCursor$1.current);\n  var nextContext = getChildHostContext(context, fiber.type); // Don't push this Fiber's context unless it's unique.\n\n  if (context === nextContext) {\n    return;\n  } // Track the context and the Fiber that provided it.\n  // This enables us to pop only Fibers that provide unique contexts.\n\n\n  push(contextFiberStackCursor, fiber, fiber);\n  push(contextStackCursor$1, nextContext, fiber);\n}\n\nfunction popHostContext(fiber) {\n  // Do not pop unless this Fiber provided the current context.\n  // pushHostContext() only pushes Fibers that provide unique contexts.\n  if (contextFiberStackCursor.current !== fiber) {\n    return;\n  }\n\n  pop(contextStackCursor$1, fiber);\n  pop(contextFiberStackCursor, fiber);\n}\n\nvar DefaultSuspenseContext = 0; // The Suspense Context is split into two parts. The lower bits is\n// inherited deeply down the subtree. The upper bits only affect\n// this immediate suspense boundary and gets reset each new\n// boundary or suspense list.\n\nvar SubtreeSuspenseContextMask = 1; // Subtree Flags:\n// InvisibleParentSuspenseContext indicates that one of our parent Suspense\n// boundaries is not currently showing visible main content.\n// Either because it is already showing a fallback or is not mounted at all.\n// We can use this to determine if it is desirable to trigger a fallback at\n// the parent. If not, then we might need to trigger undesirable boundaries\n// and/or suspend the commit to avoid hiding the parent content.\n\nvar InvisibleParentSuspenseContext = 1; // Shallow Flags:\n// ForceSuspenseFallback can be used by SuspenseList to force newly added\n// items into their fallback state during one of the render passes.\n\nvar ForceSuspenseFallback = 2;\nvar suspenseStackCursor = createCursor(DefaultSuspenseContext);\nfunction hasSuspenseContext(parentContext, flag) {\n  return (parentContext & flag) !== 0;\n}\nfunction setDefaultShallowSuspenseContext(parentContext) {\n  return parentContext & SubtreeSuspenseContextMask;\n}\nfunction setShallowSuspenseContext(parentContext, shallowContext) {\n  return parentContext & SubtreeSuspenseContextMask | shallowContext;\n}\nfunction addSubtreeSuspenseContext(parentContext, subtreeContext) {\n  return parentContext | subtreeContext;\n}\nfunction pushSuspenseContext(fiber, newContext) {\n  push(suspenseStackCursor, newContext, fiber);\n}\nfunction popSuspenseContext(fiber) {\n  pop(suspenseStackCursor, fiber);\n}\n\nfunction shouldCaptureSuspense(workInProgress, hasInvisibleParent) {\n  // If it was the primary children that just suspended, capture and render the\n  // fallback. Otherwise, don't capture and bubble to the next boundary.\n  var nextState = workInProgress.memoizedState;\n\n  if (nextState !== null) {\n    if (nextState.dehydrated !== null) {\n      // A dehydrated boundary always captures.\n      return true;\n    }\n\n    return false;\n  }\n\n  var props = workInProgress.memoizedProps; // In order to capture, the Suspense component must have a fallback prop.\n\n  if (props.fallback === undefined) {\n    return false;\n  } // Regular boundaries always capture.\n\n\n  if (props.unstable_avoidThisFallback !== true) {\n    return true;\n  } // If it's a boundary we should avoid, then we prefer to bubble up to the\n  // parent boundary if it is currently invisible.\n\n\n  if (hasInvisibleParent) {\n    return false;\n  } // If the parent is not able to handle it, we must handle it.\n\n\n  return true;\n}\nfunction findFirstSuspended(row) {\n  var node = row;\n\n  while (node !== null) {\n    if (node.tag === SuspenseComponent) {\n      var state = node.memoizedState;\n\n      if (state !== null) {\n        var dehydrated = state.dehydrated;\n\n        if (dehydrated === null || isSuspenseInstancePending(dehydrated) || isSuspenseInstanceFallback(dehydrated)) {\n          return node;\n        }\n      }\n    } else if (node.tag === SuspenseListComponent && // revealOrder undefined can't be trusted because it don't\n    // keep track of whether it suspended or not.\n    node.memoizedProps.revealOrder !== undefined) {\n      var didSuspend = (node.flags & DidCapture) !== NoFlags;\n\n      if (didSuspend) {\n        return node;\n      }\n    } else if (node.child !== null) {\n      node.child.return = node;\n      node = node.child;\n      continue;\n    }\n\n    if (node === row) {\n      return null;\n    }\n\n    while (node.sibling === null) {\n      if (node.return === null || node.return === row) {\n        return null;\n      }\n\n      node = node.return;\n    }\n\n    node.sibling.return = node.return;\n    node = node.sibling;\n  }\n\n  return null;\n}\n\nvar NoFlags$1 =\n/*  */\n0; // Represents whether effect should fire.\n\nvar HasEffect =\n/* */\n1; // Represents the phase in which the effect (not the clean-up) fires.\n\nvar Layout =\n/*    */\n2;\nvar Passive$1 =\n/*   */\n4;\n\n// This may have been an insertion or a hydration.\n\nvar hydrationParentFiber = null;\nvar nextHydratableInstance = null;\nvar isHydrating = false;\n\nfunction enterHydrationState(fiber) {\n\n  var parentInstance = fiber.stateNode.containerInfo;\n  nextHydratableInstance = getFirstHydratableChild(parentInstance);\n  hydrationParentFiber = fiber;\n  isHydrating = true;\n  return true;\n}\n\nfunction deleteHydratableInstance(returnFiber, instance) {\n  {\n    switch (returnFiber.tag) {\n      case HostRoot:\n        didNotHydrateContainerInstance(returnFiber.stateNode.containerInfo, instance);\n        break;\n\n      case HostComponent:\n        didNotHydrateInstance(returnFiber.type, returnFiber.memoizedProps, returnFiber.stateNode, instance);\n        break;\n    }\n  }\n\n  var childToDelete = createFiberFromHostInstanceForDeletion();\n  childToDelete.stateNode = instance;\n  childToDelete.return = returnFiber;\n  childToDelete.flags = Deletion; // This might seem like it belongs on progressedFirstDeletion. However,\n  // these children are not part of the reconciliation list of children.\n  // Even if we abort and rereconcile the children, that will try to hydrate\n  // again and the nodes are still in the host tree so these will be\n  // recreated.\n\n  if (returnFiber.lastEffect !== null) {\n    returnFiber.lastEffect.nextEffect = childToDelete;\n    returnFiber.lastEffect = childToDelete;\n  } else {\n    returnFiber.firstEffect = returnFiber.lastEffect = childToDelete;\n  }\n}\n\nfunction insertNonHydratedInstance(returnFiber, fiber) {\n  fiber.flags = fiber.flags & ~Hydrating | Placement;\n\n  {\n    switch (returnFiber.tag) {\n      case HostRoot:\n        {\n          var parentContainer = returnFiber.stateNode.containerInfo;\n\n          switch (fiber.tag) {\n            case HostComponent:\n              var type = fiber.type;\n              var props = fiber.pendingProps;\n              didNotFindHydratableContainerInstance(parentContainer, type);\n              break;\n\n            case HostText:\n              var text = fiber.pendingProps;\n              didNotFindHydratableContainerTextInstance(parentContainer, text);\n              break;\n          }\n\n          break;\n        }\n\n      case HostComponent:\n        {\n          var parentType = returnFiber.type;\n          var parentProps = returnFiber.memoizedProps;\n          var parentInstance = returnFiber.stateNode;\n\n          switch (fiber.tag) {\n            case HostComponent:\n              var _type = fiber.type;\n              var _props = fiber.pendingProps;\n              didNotFindHydratableInstance(parentType, parentProps, parentInstance, _type);\n              break;\n\n            case HostText:\n              var _text = fiber.pendingProps;\n              didNotFindHydratableTextInstance(parentType, parentProps, parentInstance, _text);\n              break;\n\n            case SuspenseComponent:\n              didNotFindHydratableSuspenseInstance(parentType, parentProps);\n              break;\n          }\n\n          break;\n        }\n\n      default:\n        return;\n    }\n  }\n}\n\nfunction tryHydrate(fiber, nextInstance) {\n  switch (fiber.tag) {\n    case HostComponent:\n      {\n        var type = fiber.type;\n        var props = fiber.pendingProps;\n        var instance = canHydrateInstance(nextInstance, type);\n\n        if (instance !== null) {\n          fiber.stateNode = instance;\n          return true;\n        }\n\n        return false;\n      }\n\n    case HostText:\n      {\n        var text = fiber.pendingProps;\n        var textInstance = canHydrateTextInstance(nextInstance, text);\n\n        if (textInstance !== null) {\n          fiber.stateNode = textInstance;\n          return true;\n        }\n\n        return false;\n      }\n\n    case SuspenseComponent:\n      {\n\n        return false;\n      }\n\n    default:\n      return false;\n  }\n}\n\nfunction tryToClaimNextHydratableInstance(fiber) {\n  if (!isHydrating) {\n    return;\n  }\n\n  var nextInstance = nextHydratableInstance;\n\n  if (!nextInstance) {\n    // Nothing to hydrate. Make it an insertion.\n    insertNonHydratedInstance(hydrationParentFiber, fiber);\n    isHydrating = false;\n    hydrationParentFiber = fiber;\n    return;\n  }\n\n  var firstAttemptedInstance = nextInstance;\n\n  if (!tryHydrate(fiber, nextInstance)) {\n    // If we can't hydrate this instance let's try the next one.\n    // We use this as a heuristic. It's based on intuition and not data so it\n    // might be flawed or unnecessary.\n    nextInstance = getNextHydratableSibling(firstAttemptedInstance);\n\n    if (!nextInstance || !tryHydrate(fiber, nextInstance)) {\n      // Nothing to hydrate. Make it an insertion.\n      insertNonHydratedInstance(hydrationParentFiber, fiber);\n      isHydrating = false;\n      hydrationParentFiber = fiber;\n      return;\n    } // We matched the next one, we'll now assume that the first one was\n    // superfluous and we'll delete it. Since we can't eagerly delete it\n    // we'll have to schedule a deletion. To do that, this node needs a dummy\n    // fiber associated with it.\n\n\n    deleteHydratableInstance(hydrationParentFiber, firstAttemptedInstance);\n  }\n\n  hydrationParentFiber = fiber;\n  nextHydratableInstance = getFirstHydratableChild(nextInstance);\n}\n\nfunction prepareToHydrateHostInstance(fiber, rootContainerInstance, hostContext) {\n\n  var instance = fiber.stateNode;\n  var updatePayload = hydrateInstance(instance, fiber.type, fiber.memoizedProps, rootContainerInstance, hostContext, fiber); // TODO: Type this specific to this type of component.\n\n  fiber.updateQueue = updatePayload; // If the update payload indicates that there is a change or if there\n  // is a new ref we mark this as an update.\n\n  if (updatePayload !== null) {\n    return true;\n  }\n\n  return false;\n}\n\nfunction prepareToHydrateHostTextInstance(fiber) {\n\n  var textInstance = fiber.stateNode;\n  var textContent = fiber.memoizedProps;\n  var shouldUpdate = hydrateTextInstance(textInstance, textContent, fiber);\n\n  {\n    if (shouldUpdate) {\n      // We assume that prepareToHydrateHostTextInstance is called in a context where the\n      // hydration parent is the parent host component of this host text.\n      var returnFiber = hydrationParentFiber;\n\n      if (returnFiber !== null) {\n        switch (returnFiber.tag) {\n          case HostRoot:\n            {\n              var parentContainer = returnFiber.stateNode.containerInfo;\n              didNotMatchHydratedContainerTextInstance(parentContainer, textInstance, textContent);\n              break;\n            }\n\n          case HostComponent:\n            {\n              var parentType = returnFiber.type;\n              var parentProps = returnFiber.memoizedProps;\n              var parentInstance = returnFiber.stateNode;\n              didNotMatchHydratedTextInstance(parentType, parentProps, parentInstance, textInstance, textContent);\n              break;\n            }\n        }\n      }\n    }\n  }\n\n  return shouldUpdate;\n}\n\nfunction skipPastDehydratedSuspenseInstance(fiber) {\n\n  var suspenseState = fiber.memoizedState;\n  var suspenseInstance = suspenseState !== null ? suspenseState.dehydrated : null;\n\n  if (!suspenseInstance) {\n    {\n      throw Error( \"Expected to have a hydrated suspense instance. This error is likely caused by a bug in React. Please file an issue.\" );\n    }\n  }\n\n  return getNextHydratableInstanceAfterSuspenseInstance(suspenseInstance);\n}\n\nfunction popToNextHostParent(fiber) {\n  var parent = fiber.return;\n\n  while (parent !== null && parent.tag !== HostComponent && parent.tag !== HostRoot && parent.tag !== SuspenseComponent) {\n    parent = parent.return;\n  }\n\n  hydrationParentFiber = parent;\n}\n\nfunction popHydrationState(fiber) {\n\n  if (fiber !== hydrationParentFiber) {\n    // We're deeper than the current hydration context, inside an inserted\n    // tree.\n    return false;\n  }\n\n  if (!isHydrating) {\n    // If we're not currently hydrating but we're in a hydration context, then\n    // we were an insertion and now need to pop up reenter hydration of our\n    // siblings.\n    popToNextHostParent(fiber);\n    isHydrating = true;\n    return false;\n  }\n\n  var type = fiber.type; // If we have any remaining hydratable nodes, we need to delete them now.\n  // We only do this deeper than head and body since they tend to have random\n  // other nodes in them. We also ignore components with pure text content in\n  // side of them.\n  // TODO: Better heuristic.\n\n  if (fiber.tag !== HostComponent || type !== 'head' && type !== 'body' && !shouldSetTextContent(type, fiber.memoizedProps)) {\n    var nextInstance = nextHydratableInstance;\n\n    while (nextInstance) {\n      deleteHydratableInstance(fiber, nextInstance);\n      nextInstance = getNextHydratableSibling(nextInstance);\n    }\n  }\n\n  popToNextHostParent(fiber);\n\n  if (fiber.tag === SuspenseComponent) {\n    nextHydratableInstance = skipPastDehydratedSuspenseInstance(fiber);\n  } else {\n    nextHydratableInstance = hydrationParentFiber ? getNextHydratableSibling(fiber.stateNode) : null;\n  }\n\n  return true;\n}\n\nfunction resetHydrationState() {\n\n  hydrationParentFiber = null;\n  nextHydratableInstance = null;\n  isHydrating = false;\n}\n\nfunction getIsHydrating() {\n  return isHydrating;\n}\n\n// and should be reset before starting a new render.\n// This tracks which mutable sources need to be reset after a render.\n\nvar workInProgressSources = [];\nvar rendererSigil$1;\n\n{\n  // Used to detect multiple renderers using the same mutable source.\n  rendererSigil$1 = {};\n}\n\nfunction markSourceAsDirty(mutableSource) {\n  workInProgressSources.push(mutableSource);\n}\nfunction resetWorkInProgressVersions() {\n  for (var i = 0; i < workInProgressSources.length; i++) {\n    var mutableSource = workInProgressSources[i];\n\n    {\n      mutableSource._workInProgressVersionPrimary = null;\n    }\n  }\n\n  workInProgressSources.length = 0;\n}\nfunction getWorkInProgressVersion(mutableSource) {\n  {\n    return mutableSource._workInProgressVersionPrimary;\n  }\n}\nfunction setWorkInProgressVersion(mutableSource, version) {\n  {\n    mutableSource._workInProgressVersionPrimary = version;\n  }\n\n  workInProgressSources.push(mutableSource);\n}\nfunction warnAboutMultipleRenderersDEV(mutableSource) {\n  {\n    {\n      if (mutableSource._currentPrimaryRenderer == null) {\n        mutableSource._currentPrimaryRenderer = rendererSigil$1;\n      } else if (mutableSource._currentPrimaryRenderer !== rendererSigil$1) {\n        error('Detected multiple renderers concurrently rendering the ' + 'same mutable source. This is currently unsupported.');\n      }\n    }\n  }\n} // Eager reads the version of a mutable source and stores it on the root.\n\nvar ReactCurrentDispatcher$1 = ReactSharedInternals.ReactCurrentDispatcher,\n    ReactCurrentBatchConfig$1 = ReactSharedInternals.ReactCurrentBatchConfig;\nvar didWarnAboutMismatchedHooksForComponent;\nvar didWarnAboutUseOpaqueIdentifier;\n\n{\n  didWarnAboutUseOpaqueIdentifier = {};\n  didWarnAboutMismatchedHooksForComponent = new Set();\n}\n\n// These are set right before calling the component.\nvar renderLanes = NoLanes; // The work-in-progress fiber. I've named it differently to distinguish it from\n// the work-in-progress hook.\n\nvar currentlyRenderingFiber$1 = null; // Hooks are stored as a linked list on the fiber's memoizedState field. The\n// current hook list is the list that belongs to the current fiber. The\n// work-in-progress hook list is a new list that will be added to the\n// work-in-progress fiber.\n\nvar currentHook = null;\nvar workInProgressHook = null; // Whether an update was scheduled at any point during the render phase. This\n// does not get reset if we do another render pass; only when we're completely\n// finished evaluating this component. This is an optimization so we know\n// whether we need to clear render phase updates after a throw.\n\nvar didScheduleRenderPhaseUpdate = false; // Where an update was scheduled only during the current render pass. This\n// gets reset after each attempt.\n// TODO: Maybe there's some way to consolidate this with\n// `didScheduleRenderPhaseUpdate`. Or with `numberOfReRenders`.\n\nvar didScheduleRenderPhaseUpdateDuringThisPass = false;\nvar RE_RENDER_LIMIT = 25; // In DEV, this is the name of the currently executing primitive hook\n\nvar currentHookNameInDev = null; // In DEV, this list ensures that hooks are called in the same order between renders.\n// The list stores the order of hooks used during the initial render (mount).\n// Subsequent renders (updates) reference this list.\n\nvar hookTypesDev = null;\nvar hookTypesUpdateIndexDev = -1; // In DEV, this tracks whether currently rendering component needs to ignore\n// the dependencies for Hooks that need them (e.g. useEffect or useMemo).\n// When true, such Hooks will always be \"remounted\". Only used during hot reload.\n\nvar ignorePreviousDependencies = false;\n\nfunction mountHookTypesDev() {\n  {\n    var hookName = currentHookNameInDev;\n\n    if (hookTypesDev === null) {\n      hookTypesDev = [hookName];\n    } else {\n      hookTypesDev.push(hookName);\n    }\n  }\n}\n\nfunction updateHookTypesDev() {\n  {\n    var hookName = currentHookNameInDev;\n\n    if (hookTypesDev !== null) {\n      hookTypesUpdateIndexDev++;\n\n      if (hookTypesDev[hookTypesUpdateIndexDev] !== hookName) {\n        warnOnHookMismatchInDev(hookName);\n      }\n    }\n  }\n}\n\nfunction checkDepsAreArrayDev(deps) {\n  {\n    if (deps !== undefined && deps !== null && !Array.isArray(deps)) {\n      // Verify deps, but only on mount to avoid extra checks.\n      // It's unlikely their type would change as usually you define them inline.\n      error('%s received a final argument that is not an array (instead, received `%s`). When ' + 'specified, the final argument must be an array.', currentHookNameInDev, typeof deps);\n    }\n  }\n}\n\nfunction warnOnHookMismatchInDev(currentHookName) {\n  {\n    var componentName = getComponentName(currentlyRenderingFiber$1.type);\n\n    if (!didWarnAboutMismatchedHooksForComponent.has(componentName)) {\n      didWarnAboutMismatchedHooksForComponent.add(componentName);\n\n      if (hookTypesDev !== null) {\n        var table = '';\n        var secondColumnStart = 30;\n\n        for (var i = 0; i <= hookTypesUpdateIndexDev; i++) {\n          var oldHookName = hookTypesDev[i];\n          var newHookName = i === hookTypesUpdateIndexDev ? currentHookName : oldHookName;\n          var row = i + 1 + \". \" + oldHookName; // Extra space so second column lines up\n          // lol @ IE not supporting String#repeat\n\n          while (row.length < secondColumnStart) {\n            row += ' ';\n          }\n\n          row += newHookName + '\\n';\n          table += row;\n        }\n\n        error('React has detected a change in the order of Hooks called by %s. ' + 'This will lead to bugs and errors if not fixed. ' + 'For more information, read the Rules of Hooks: https://reactjs.org/link/rules-of-hooks\\n\\n' + '   Previous render            Next render\\n' + '   ------------------------------------------------------\\n' + '%s' + '   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\\n', componentName, table);\n      }\n    }\n  }\n}\n\nfunction throwInvalidHookError() {\n  {\n    {\n      throw Error( \"Invalid hook call. Hooks can only be called inside of the body of a function component. This could happen for one of the following reasons:\\n1. You might have mismatching versions of React and the renderer (such as React DOM)\\n2. You might be breaking the Rules of Hooks\\n3. You might have more than one copy of React in the same app\\nSee https://reactjs.org/link/invalid-hook-call for tips about how to debug and fix this problem.\" );\n    }\n  }\n}\n\nfunction areHookInputsEqual(nextDeps, prevDeps) {\n  {\n    if (ignorePreviousDependencies) {\n      // Only true when this component is being hot reloaded.\n      return false;\n    }\n  }\n\n  if (prevDeps === null) {\n    {\n      error('%s received a final argument during this render, but not during ' + 'the previous render. Even though the final argument is optional, ' + 'its type cannot change between renders.', currentHookNameInDev);\n    }\n\n    return false;\n  }\n\n  {\n    // Don't bother comparing lengths in prod because these arrays should be\n    // passed inline.\n    if (nextDeps.length !== prevDeps.length) {\n      error('The final argument passed to %s changed size between renders. The ' + 'order and size of this array must remain constant.\\n\\n' + 'Previous: %s\\n' + 'Incoming: %s', currentHookNameInDev, \"[\" + prevDeps.join(', ') + \"]\", \"[\" + nextDeps.join(', ') + \"]\");\n    }\n  }\n\n  for (var i = 0; i < prevDeps.length && i < nextDeps.length; i++) {\n    if (objectIs(nextDeps[i], prevDeps[i])) {\n      continue;\n    }\n\n    return false;\n  }\n\n  return true;\n}\n\nfunction renderWithHooks(current, workInProgress, Component, props, secondArg, nextRenderLanes) {\n  renderLanes = nextRenderLanes;\n  currentlyRenderingFiber$1 = workInProgress;\n\n  {\n    hookTypesDev = current !== null ? current._debugHookTypes : null;\n    hookTypesUpdateIndexDev = -1; // Used for hot reloading:\n\n    ignorePreviousDependencies = current !== null && current.type !== workInProgress.type;\n  }\n\n  workInProgress.memoizedState = null;\n  workInProgress.updateQueue = null;\n  workInProgress.lanes = NoLanes; // The following should have already been reset\n  // currentHook = null;\n  // workInProgressHook = null;\n  // didScheduleRenderPhaseUpdate = false;\n  // TODO Warn if no hooks are used at all during mount, then some are used during update.\n  // Currently we will identify the update render as a mount because memoizedState === null.\n  // This is tricky because it's valid for certain types of components (e.g. React.lazy)\n  // Using memoizedState to differentiate between mount/update only works if at least one stateful hook is used.\n  // Non-stateful hooks (e.g. context) don't get added to memoizedState,\n  // so memoizedState would be null during updates and mounts.\n\n  {\n    if (current !== null && current.memoizedState !== null) {\n      ReactCurrentDispatcher$1.current = HooksDispatcherOnUpdateInDEV;\n    } else if (hookTypesDev !== null) {\n      // This dispatcher handles an edge case where a component is updating,\n      // but no stateful hooks have been used.\n      // We want to match the production code behavior (which will use HooksDispatcherOnMount),\n      // but with the extra DEV validation to ensure hooks ordering hasn't changed.\n      // This dispatcher does that.\n      ReactCurrentDispatcher$1.current = HooksDispatcherOnMountWithHookTypesInDEV;\n    } else {\n      ReactCurrentDispatcher$1.current = HooksDispatcherOnMountInDEV;\n    }\n  }\n\n  var children = Component(props, secondArg); // Check if there was a render phase update\n\n  if (didScheduleRenderPhaseUpdateDuringThisPass) {\n    // Keep rendering in a loop for as long as render phase updates continue to\n    // be scheduled. Use a counter to prevent infinite loops.\n    var numberOfReRenders = 0;\n\n    do {\n      didScheduleRenderPhaseUpdateDuringThisPass = false;\n\n      if (!(numberOfReRenders < RE_RENDER_LIMIT)) {\n        {\n          throw Error( \"Too many re-renders. React limits the number of renders to prevent an infinite loop.\" );\n        }\n      }\n\n      numberOfReRenders += 1;\n\n      {\n        // Even when hot reloading, allow dependencies to stabilize\n        // after first render to prevent infinite render phase updates.\n        ignorePreviousDependencies = false;\n      } // Start over from the beginning of the list\n\n\n      currentHook = null;\n      workInProgressHook = null;\n      workInProgress.updateQueue = null;\n\n      {\n        // Also validate hook order for cascading updates.\n        hookTypesUpdateIndexDev = -1;\n      }\n\n      ReactCurrentDispatcher$1.current =  HooksDispatcherOnRerenderInDEV ;\n      children = Component(props, secondArg);\n    } while (didScheduleRenderPhaseUpdateDuringThisPass);\n  } // We can assume the previous dispatcher is always this one, since we set it\n  // at the beginning of the render phase and there's no re-entrancy.\n\n\n  ReactCurrentDispatcher$1.current = ContextOnlyDispatcher;\n\n  {\n    workInProgress._debugHookTypes = hookTypesDev;\n  } // This check uses currentHook so that it works the same in DEV and prod bundles.\n  // hookTypesDev could catch more cases (e.g. context) but only in DEV bundles.\n\n\n  var didRenderTooFewHooks = currentHook !== null && currentHook.next !== null;\n  renderLanes = NoLanes;\n  currentlyRenderingFiber$1 = null;\n  currentHook = null;\n  workInProgressHook = null;\n\n  {\n    currentHookNameInDev = null;\n    hookTypesDev = null;\n    hookTypesUpdateIndexDev = -1;\n  }\n\n  didScheduleRenderPhaseUpdate = false;\n\n  if (!!didRenderTooFewHooks) {\n    {\n      throw Error( \"Rendered fewer hooks than expected. This may be caused by an accidental early return statement.\" );\n    }\n  }\n\n  return children;\n}\nfunction bailoutHooks(current, workInProgress, lanes) {\n  workInProgress.updateQueue = current.updateQueue;\n  workInProgress.flags &= ~(Passive | Update);\n  current.lanes = removeLanes(current.lanes, lanes);\n}\nfunction resetHooksAfterThrow() {\n  // We can assume the previous dispatcher is always this one, since we set it\n  // at the beginning of the render phase and there's no re-entrancy.\n  ReactCurrentDispatcher$1.current = ContextOnlyDispatcher;\n\n  if (didScheduleRenderPhaseUpdate) {\n    // There were render phase updates. These are only valid for this render\n    // phase, which we are now aborting. Remove the updates from the queues so\n    // they do not persist to the next render. Do not remove updates from hooks\n    // that weren't processed.\n    //\n    // Only reset the updates from the queue if it has a clone. If it does\n    // not have a clone, that means it wasn't processed, and the updates were\n    // scheduled before we entered the render phase.\n    var hook = currentlyRenderingFiber$1.memoizedState;\n\n    while (hook !== null) {\n      var queue = hook.queue;\n\n      if (queue !== null) {\n        queue.pending = null;\n      }\n\n      hook = hook.next;\n    }\n\n    didScheduleRenderPhaseUpdate = false;\n  }\n\n  renderLanes = NoLanes;\n  currentlyRenderingFiber$1 = null;\n  currentHook = null;\n  workInProgressHook = null;\n\n  {\n    hookTypesDev = null;\n    hookTypesUpdateIndexDev = -1;\n    currentHookNameInDev = null;\n    isUpdatingOpaqueValueInRenderPhase = false;\n  }\n\n  didScheduleRenderPhaseUpdateDuringThisPass = false;\n}\n\nfunction mountWorkInProgressHook() {\n  var hook = {\n    memoizedState: null,\n    baseState: null,\n    baseQueue: null,\n    queue: null,\n    next: null\n  };\n\n  if (workInProgressHook === null) {\n    // This is the first hook in the list\n    currentlyRenderingFiber$1.memoizedState = workInProgressHook = hook;\n  } else {\n    // Append to the end of the list\n    workInProgressHook = workInProgressHook.next = hook;\n  }\n\n  return workInProgressHook;\n}\n\nfunction updateWorkInProgressHook() {\n  // This function is used both for updates and for re-renders triggered by a\n  // render phase update. It assumes there is either a current hook we can\n  // clone, or a work-in-progress hook from a previous render pass that we can\n  // use as a base. When we reach the end of the base list, we must switch to\n  // the dispatcher used for mounts.\n  var nextCurrentHook;\n\n  if (currentHook === null) {\n    var current = currentlyRenderingFiber$1.alternate;\n\n    if (current !== null) {\n      nextCurrentHook = current.memoizedState;\n    } else {\n      nextCurrentHook = null;\n    }\n  } else {\n    nextCurrentHook = currentHook.next;\n  }\n\n  var nextWorkInProgressHook;\n\n  if (workInProgressHook === null) {\n    nextWorkInProgressHook = currentlyRenderingFiber$1.memoizedState;\n  } else {\n    nextWorkInProgressHook = workInProgressHook.next;\n  }\n\n  if (nextWorkInProgressHook !== null) {\n    // There's already a work-in-progress. Reuse it.\n    workInProgressHook = nextWorkInProgressHook;\n    nextWorkInProgressHook = workInProgressHook.next;\n    currentHook = nextCurrentHook;\n  } else {\n    // Clone from the current hook.\n    if (!(nextCurrentHook !== null)) {\n      {\n        throw Error( \"Rendered more hooks than during the previous render.\" );\n      }\n    }\n\n    currentHook = nextCurrentHook;\n    var newHook = {\n      memoizedState: currentHook.memoizedState,\n      baseState: currentHook.baseState,\n      baseQueue: currentHook.baseQueue,\n      queue: currentHook.queue,\n      next: null\n    };\n\n    if (workInProgressHook === null) {\n      // This is the first hook in the list.\n      currentlyRenderingFiber$1.memoizedState = workInProgressHook = newHook;\n    } else {\n      // Append to the end of the list.\n      workInProgressHook = workInProgressHook.next = newHook;\n    }\n  }\n\n  return workInProgressHook;\n}\n\nfunction createFunctionComponentUpdateQueue() {\n  return {\n    lastEffect: null\n  };\n}\n\nfunction basicStateReducer(state, action) {\n  // $FlowFixMe: Flow doesn't like mixed types\n  return typeof action === 'function' ? action(state) : action;\n}\n\nfunction mountReducer(reducer, initialArg, init) {\n  var hook = mountWorkInProgressHook();\n  var initialState;\n\n  if (init !== undefined) {\n    initialState = init(initialArg);\n  } else {\n    initialState = initialArg;\n  }\n\n  hook.memoizedState = hook.baseState = initialState;\n  var queue = hook.queue = {\n    pending: null,\n    dispatch: null,\n    lastRenderedReducer: reducer,\n    lastRenderedState: initialState\n  };\n  var dispatch = queue.dispatch = dispatchAction.bind(null, currentlyRenderingFiber$1, queue);\n  return [hook.memoizedState, dispatch];\n}\n\nfunction updateReducer(reducer, initialArg, init) {\n  var hook = updateWorkInProgressHook();\n  var queue = hook.queue;\n\n  if (!(queue !== null)) {\n    {\n      throw Error( \"Should have a queue. This is likely a bug in React. Please file an issue.\" );\n    }\n  }\n\n  queue.lastRenderedReducer = reducer;\n  var current = currentHook; // The last rebase update that is NOT part of the base state.\n\n  var baseQueue = current.baseQueue; // The last pending update that hasn't been processed yet.\n\n  var pendingQueue = queue.pending;\n\n  if (pendingQueue !== null) {\n    // We have new updates that haven't been processed yet.\n    // We'll add them to the base queue.\n    if (baseQueue !== null) {\n      // Merge the pending queue and the base queue.\n      var baseFirst = baseQueue.next;\n      var pendingFirst = pendingQueue.next;\n      baseQueue.next = pendingFirst;\n      pendingQueue.next = baseFirst;\n    }\n\n    {\n      if (current.baseQueue !== baseQueue) {\n        // Internal invariant that should never happen, but feasibly could in\n        // the future if we implement resuming, or some form of that.\n        error('Internal error: Expected work-in-progress queue to be a clone. ' + 'This is a bug in React.');\n      }\n    }\n\n    current.baseQueue = baseQueue = pendingQueue;\n    queue.pending = null;\n  }\n\n  if (baseQueue !== null) {\n    // We have a queue to process.\n    var first = baseQueue.next;\n    var newState = current.baseState;\n    var newBaseState = null;\n    var newBaseQueueFirst = null;\n    var newBaseQueueLast = null;\n    var update = first;\n\n    do {\n      var updateLane = update.lane;\n\n      if (!isSubsetOfLanes(renderLanes, updateLane)) {\n        // Priority is insufficient. Skip this update. If this is the first\n        // skipped update, the previous update/state is the new base\n        // update/state.\n        var clone = {\n          lane: updateLane,\n          action: update.action,\n          eagerReducer: update.eagerReducer,\n          eagerState: update.eagerState,\n          next: null\n        };\n\n        if (newBaseQueueLast === null) {\n          newBaseQueueFirst = newBaseQueueLast = clone;\n          newBaseState = newState;\n        } else {\n          newBaseQueueLast = newBaseQueueLast.next = clone;\n        } // Update the remaining priority in the queue.\n        // TODO: Don't need to accumulate this. Instead, we can remove\n        // renderLanes from the original lanes.\n\n\n        currentlyRenderingFiber$1.lanes = mergeLanes(currentlyRenderingFiber$1.lanes, updateLane);\n        markSkippedUpdateLanes(updateLane);\n      } else {\n        // This update does have sufficient priority.\n        if (newBaseQueueLast !== null) {\n          var _clone = {\n            // This update is going to be committed so we never want uncommit\n            // it. Using NoLane works because 0 is a subset of all bitmasks, so\n            // this will never be skipped by the check above.\n            lane: NoLane,\n            action: update.action,\n            eagerReducer: update.eagerReducer,\n            eagerState: update.eagerState,\n            next: null\n          };\n          newBaseQueueLast = newBaseQueueLast.next = _clone;\n        } // Process this update.\n\n\n        if (update.eagerReducer === reducer) {\n          // If this update was processed eagerly, and its reducer matches the\n          // current reducer, we can use the eagerly computed state.\n          newState = update.eagerState;\n        } else {\n          var action = update.action;\n          newState = reducer(newState, action);\n        }\n      }\n\n      update = update.next;\n    } while (update !== null && update !== first);\n\n    if (newBaseQueueLast === null) {\n      newBaseState = newState;\n    } else {\n      newBaseQueueLast.next = newBaseQueueFirst;\n    } // Mark that the fiber performed work, but only if the new state is\n    // different from the current state.\n\n\n    if (!objectIs(newState, hook.memoizedState)) {\n      markWorkInProgressReceivedUpdate();\n    }\n\n    hook.memoizedState = newState;\n    hook.baseState = newBaseState;\n    hook.baseQueue = newBaseQueueLast;\n    queue.lastRenderedState = newState;\n  }\n\n  var dispatch = queue.dispatch;\n  return [hook.memoizedState, dispatch];\n}\n\nfunction rerenderReducer(reducer, initialArg, init) {\n  var hook = updateWorkInProgressHook();\n  var queue = hook.queue;\n\n  if (!(queue !== null)) {\n    {\n      throw Error( \"Should have a queue. This is likely a bug in React. Please file an issue.\" );\n    }\n  }\n\n  queue.lastRenderedReducer = reducer; // This is a re-render. Apply the new render phase updates to the previous\n  // work-in-progress hook.\n\n  var dispatch = queue.dispatch;\n  var lastRenderPhaseUpdate = queue.pending;\n  var newState = hook.memoizedState;\n\n  if (lastRenderPhaseUpdate !== null) {\n    // The queue doesn't persist past this render pass.\n    queue.pending = null;\n    var firstRenderPhaseUpdate = lastRenderPhaseUpdate.next;\n    var update = firstRenderPhaseUpdate;\n\n    do {\n      // Process this render phase update. We don't have to check the\n      // priority because it will always be the same as the current\n      // render's.\n      var action = update.action;\n      newState = reducer(newState, action);\n      update = update.next;\n    } while (update !== firstRenderPhaseUpdate); // Mark that the fiber performed work, but only if the new state is\n    // different from the current state.\n\n\n    if (!objectIs(newState, hook.memoizedState)) {\n      markWorkInProgressReceivedUpdate();\n    }\n\n    hook.memoizedState = newState; // Don't persist the state accumulated from the render phase updates to\n    // the base state unless the queue is empty.\n    // TODO: Not sure if this is the desired semantics, but it's what we\n    // do for gDSFP. I can't remember why.\n\n    if (hook.baseQueue === null) {\n      hook.baseState = newState;\n    }\n\n    queue.lastRenderedState = newState;\n  }\n\n  return [newState, dispatch];\n}\n\nfunction readFromUnsubcribedMutableSource(root, source, getSnapshot) {\n  {\n    warnAboutMultipleRenderersDEV(source);\n  }\n\n  var getVersion = source._getVersion;\n  var version = getVersion(source._source); // Is it safe for this component to read from this source during the current render?\n\n  var isSafeToReadFromSource = false; // Check the version first.\n  // If this render has already been started with a specific version,\n  // we can use it alone to determine if we can safely read from the source.\n\n  var currentRenderVersion = getWorkInProgressVersion(source);\n\n  if (currentRenderVersion !== null) {\n    // It's safe to read if the store hasn't been mutated since the last time\n    // we read something.\n    isSafeToReadFromSource = currentRenderVersion === version;\n  } else {\n    // If there's no version, then this is the first time we've read from the\n    // source during the current render pass, so we need to do a bit more work.\n    // What we need to determine is if there are any hooks that already\n    // subscribed to the source, and if so, whether there are any pending\n    // mutations that haven't been synchronized yet.\n    //\n    // If there are no pending mutations, then `root.mutableReadLanes` will be\n    // empty, and we know we can safely read.\n    //\n    // If there *are* pending mutations, we may still be able to safely read\n    // if the currently rendering lanes are inclusive of the pending mutation\n    // lanes, since that guarantees that the value we're about to read from\n    // the source is consistent with the values that we read during the most\n    // recent mutation.\n    isSafeToReadFromSource = isSubsetOfLanes(renderLanes, root.mutableReadLanes);\n\n    if (isSafeToReadFromSource) {\n      // If it's safe to read from this source during the current render,\n      // store the version in case other components read from it.\n      // A changed version number will let those components know to throw and restart the render.\n      setWorkInProgressVersion(source, version);\n    }\n  }\n\n  if (isSafeToReadFromSource) {\n    var snapshot = getSnapshot(source._source);\n\n    {\n      if (typeof snapshot === 'function') {\n        error('Mutable source should not return a function as the snapshot value. ' + 'Functions may close over mutable values and cause tearing.');\n      }\n    }\n\n    return snapshot;\n  } else {\n    // This handles the special case of a mutable source being shared between renderers.\n    // In that case, if the source is mutated between the first and second renderer,\n    // The second renderer don't know that it needs to reset the WIP version during unwind,\n    // (because the hook only marks sources as dirty if it's written to their WIP version).\n    // That would cause this tear check to throw again and eventually be visible to the user.\n    // We can avoid this infinite loop by explicitly marking the source as dirty.\n    //\n    // This can lead to tearing in the first renderer when it resumes,\n    // but there's nothing we can do about that (short of throwing here and refusing to continue the render).\n    markSourceAsDirty(source);\n\n    {\n      {\n        throw Error( \"Cannot read from mutable source during the current render without tearing. This is a bug in React. Please file an issue.\" );\n      }\n    }\n  }\n}\n\nfunction useMutableSource(hook, source, getSnapshot, subscribe) {\n  var root = getWorkInProgressRoot();\n\n  if (!(root !== null)) {\n    {\n      throw Error( \"Expected a work-in-progress root. This is a bug in React. Please file an issue.\" );\n    }\n  }\n\n  var getVersion = source._getVersion;\n  var version = getVersion(source._source);\n  var dispatcher = ReactCurrentDispatcher$1.current; // eslint-disable-next-line prefer-const\n\n  var _dispatcher$useState = dispatcher.useState(function () {\n    return readFromUnsubcribedMutableSource(root, source, getSnapshot);\n  }),\n      currentSnapshot = _dispatcher$useState[0],\n      setSnapshot = _dispatcher$useState[1];\n\n  var snapshot = currentSnapshot; // Grab a handle to the state hook as well.\n  // We use it to clear the pending update queue if we have a new source.\n\n  var stateHook = workInProgressHook;\n  var memoizedState = hook.memoizedState;\n  var refs = memoizedState.refs;\n  var prevGetSnapshot = refs.getSnapshot;\n  var prevSource = memoizedState.source;\n  var prevSubscribe = memoizedState.subscribe;\n  var fiber = currentlyRenderingFiber$1;\n  hook.memoizedState = {\n    refs: refs,\n    source: source,\n    subscribe: subscribe\n  }; // Sync the values needed by our subscription handler after each commit.\n\n  dispatcher.useEffect(function () {\n    refs.getSnapshot = getSnapshot; // Normally the dispatch function for a state hook never changes,\n    // but this hook recreates the queue in certain cases  to avoid updates from stale sources.\n    // handleChange() below needs to reference the dispatch function without re-subscribing,\n    // so we use a ref to ensure that it always has the latest version.\n\n    refs.setSnapshot = setSnapshot; // Check for a possible change between when we last rendered now.\n\n    var maybeNewVersion = getVersion(source._source);\n\n    if (!objectIs(version, maybeNewVersion)) {\n      var maybeNewSnapshot = getSnapshot(source._source);\n\n      {\n        if (typeof maybeNewSnapshot === 'function') {\n          error('Mutable source should not return a function as the snapshot value. ' + 'Functions may close over mutable values and cause tearing.');\n        }\n      }\n\n      if (!objectIs(snapshot, maybeNewSnapshot)) {\n        setSnapshot(maybeNewSnapshot);\n        var lane = requestUpdateLane(fiber);\n        markRootMutableRead(root, lane);\n      } // If the source mutated between render and now,\n      // there may be state updates already scheduled from the old source.\n      // Entangle the updates so that they render in the same batch.\n\n\n      markRootEntangled(root, root.mutableReadLanes);\n    }\n  }, [getSnapshot, source, subscribe]); // If we got a new source or subscribe function, re-subscribe in a passive effect.\n\n  dispatcher.useEffect(function () {\n    var handleChange = function () {\n      var latestGetSnapshot = refs.getSnapshot;\n      var latestSetSnapshot = refs.setSnapshot;\n\n      try {\n        latestSetSnapshot(latestGetSnapshot(source._source)); // Record a pending mutable source update with the same expiration time.\n\n        var lane = requestUpdateLane(fiber);\n        markRootMutableRead(root, lane);\n      } catch (error) {\n        // A selector might throw after a source mutation.\n        // e.g. it might try to read from a part of the store that no longer exists.\n        // In this case we should still schedule an update with React.\n        // Worst case the selector will throw again and then an error boundary will handle it.\n        latestSetSnapshot(function () {\n          throw error;\n        });\n      }\n    };\n\n    var unsubscribe = subscribe(source._source, handleChange);\n\n    {\n      if (typeof unsubscribe !== 'function') {\n        error('Mutable source subscribe function must return an unsubscribe function.');\n      }\n    }\n\n    return unsubscribe;\n  }, [source, subscribe]); // If any of the inputs to useMutableSource change, reading is potentially unsafe.\n  //\n  // If either the source or the subscription have changed we can't can't trust the update queue.\n  // Maybe the source changed in a way that the old subscription ignored but the new one depends on.\n  //\n  // If the getSnapshot function changed, we also shouldn't rely on the update queue.\n  // It's possible that the underlying source was mutated between the when the last \"change\" event fired,\n  // and when the current render (with the new getSnapshot function) is processed.\n  //\n  // In both cases, we need to throw away pending updates (since they are no longer relevant)\n  // and treat reading from the source as we do in the mount case.\n\n  if (!objectIs(prevGetSnapshot, getSnapshot) || !objectIs(prevSource, source) || !objectIs(prevSubscribe, subscribe)) {\n    // Create a new queue and setState method,\n    // So if there are interleaved updates, they get pushed to the older queue.\n    // When this becomes current, the previous queue and dispatch method will be discarded,\n    // including any interleaving updates that occur.\n    var newQueue = {\n      pending: null,\n      dispatch: null,\n      lastRenderedReducer: basicStateReducer,\n      lastRenderedState: snapshot\n    };\n    newQueue.dispatch = setSnapshot = dispatchAction.bind(null, currentlyRenderingFiber$1, newQueue);\n    stateHook.queue = newQueue;\n    stateHook.baseQueue = null;\n    snapshot = readFromUnsubcribedMutableSource(root, source, getSnapshot);\n    stateHook.memoizedState = stateHook.baseState = snapshot;\n  }\n\n  return snapshot;\n}\n\nfunction mountMutableSource(source, getSnapshot, subscribe) {\n  var hook = mountWorkInProgressHook();\n  hook.memoizedState = {\n    refs: {\n      getSnapshot: getSnapshot,\n      setSnapshot: null\n    },\n    source: source,\n    subscribe: subscribe\n  };\n  return useMutableSource(hook, source, getSnapshot, subscribe);\n}\n\nfunction updateMutableSource(source, getSnapshot, subscribe) {\n  var hook = updateWorkInProgressHook();\n  return useMutableSource(hook, source, getSnapshot, subscribe);\n}\n\nfunction mountState(initialState) {\n  var hook = mountWorkInProgressHook();\n\n  if (typeof initialState === 'function') {\n    // $FlowFixMe: Flow doesn't like mixed types\n    initialState = initialState();\n  }\n\n  hook.memoizedState = hook.baseState = initialState;\n  var queue = hook.queue = {\n    pending: null,\n    dispatch: null,\n    lastRenderedReducer: basicStateReducer,\n    lastRenderedState: initialState\n  };\n  var dispatch = queue.dispatch = dispatchAction.bind(null, currentlyRenderingFiber$1, queue);\n  return [hook.memoizedState, dispatch];\n}\n\nfunction updateState(initialState) {\n  return updateReducer(basicStateReducer);\n}\n\nfunction rerenderState(initialState) {\n  return rerenderReducer(basicStateReducer);\n}\n\nfunction pushEffect(tag, create, destroy, deps) {\n  var effect = {\n    tag: tag,\n    create: create,\n    destroy: destroy,\n    deps: deps,\n    // Circular\n    next: null\n  };\n  var componentUpdateQueue = currentlyRenderingFiber$1.updateQueue;\n\n  if (componentUpdateQueue === null) {\n    componentUpdateQueue = createFunctionComponentUpdateQueue();\n    currentlyRenderingFiber$1.updateQueue = componentUpdateQueue;\n    componentUpdateQueue.lastEffect = effect.next = effect;\n  } else {\n    var lastEffect = componentUpdateQueue.lastEffect;\n\n    if (lastEffect === null) {\n      componentUpdateQueue.lastEffect = effect.next = effect;\n    } else {\n      var firstEffect = lastEffect.next;\n      lastEffect.next = effect;\n      effect.next = firstEffect;\n      componentUpdateQueue.lastEffect = effect;\n    }\n  }\n\n  return effect;\n}\n\nfunction mountRef(initialValue) {\n  var hook = mountWorkInProgressHook();\n  var ref = {\n    current: initialValue\n  };\n\n  {\n    Object.seal(ref);\n  }\n\n  hook.memoizedState = ref;\n  return ref;\n}\n\nfunction updateRef(initialValue) {\n  var hook = updateWorkInProgressHook();\n  return hook.memoizedState;\n}\n\nfunction mountEffectImpl(fiberFlags, hookFlags, create, deps) {\n  var hook = mountWorkInProgressHook();\n  var nextDeps = deps === undefined ? null : deps;\n  currentlyRenderingFiber$1.flags |= fiberFlags;\n  hook.memoizedState = pushEffect(HasEffect | hookFlags, create, undefined, nextDeps);\n}\n\nfunction updateEffectImpl(fiberFlags, hookFlags, create, deps) {\n  var hook = updateWorkInProgressHook();\n  var nextDeps = deps === undefined ? null : deps;\n  var destroy = undefined;\n\n  if (currentHook !== null) {\n    var prevEffect = currentHook.memoizedState;\n    destroy = prevEffect.destroy;\n\n    if (nextDeps !== null) {\n      var prevDeps = prevEffect.deps;\n\n      if (areHookInputsEqual(nextDeps, prevDeps)) {\n        pushEffect(hookFlags, create, destroy, nextDeps);\n        return;\n      }\n    }\n  }\n\n  currentlyRenderingFiber$1.flags |= fiberFlags;\n  hook.memoizedState = pushEffect(HasEffect | hookFlags, create, destroy, nextDeps);\n}\n\nfunction mountEffect(create, deps) {\n  {\n    // $FlowExpectedError - jest isn't a global, and isn't recognized outside of tests\n    if ('undefined' !== typeof jest) {\n      warnIfNotCurrentlyActingEffectsInDEV(currentlyRenderingFiber$1);\n    }\n  }\n\n  return mountEffectImpl(Update | Passive, Passive$1, create, deps);\n}\n\nfunction updateEffect(create, deps) {\n  {\n    // $FlowExpectedError - jest isn't a global, and isn't recognized outside of tests\n    if ('undefined' !== typeof jest) {\n      warnIfNotCurrentlyActingEffectsInDEV(currentlyRenderingFiber$1);\n    }\n  }\n\n  return updateEffectImpl(Update | Passive, Passive$1, create, deps);\n}\n\nfunction mountLayoutEffect(create, deps) {\n  return mountEffectImpl(Update, Layout, create, deps);\n}\n\nfunction updateLayoutEffect(create, deps) {\n  return updateEffectImpl(Update, Layout, create, deps);\n}\n\nfunction imperativeHandleEffect(create, ref) {\n  if (typeof ref === 'function') {\n    var refCallback = ref;\n\n    var _inst = create();\n\n    refCallback(_inst);\n    return function () {\n      refCallback(null);\n    };\n  } else if (ref !== null && ref !== undefined) {\n    var refObject = ref;\n\n    {\n      if (!refObject.hasOwnProperty('current')) {\n        error('Expected useImperativeHandle() first argument to either be a ' + 'ref callback or React.createRef() object. Instead received: %s.', 'an object with keys {' + Object.keys(refObject).join(', ') + '}');\n      }\n    }\n\n    var _inst2 = create();\n\n    refObject.current = _inst2;\n    return function () {\n      refObject.current = null;\n    };\n  }\n}\n\nfunction mountImperativeHandle(ref, create, deps) {\n  {\n    if (typeof create !== 'function') {\n      error('Expected useImperativeHandle() second argument to be a function ' + 'that creates a handle. Instead received: %s.', create !== null ? typeof create : 'null');\n    }\n  } // TODO: If deps are provided, should we skip comparing the ref itself?\n\n\n  var effectDeps = deps !== null && deps !== undefined ? deps.concat([ref]) : null;\n  return mountEffectImpl(Update, Layout, imperativeHandleEffect.bind(null, create, ref), effectDeps);\n}\n\nfunction updateImperativeHandle(ref, create, deps) {\n  {\n    if (typeof create !== 'function') {\n      error('Expected useImperativeHandle() second argument to be a function ' + 'that creates a handle. Instead received: %s.', create !== null ? typeof create : 'null');\n    }\n  } // TODO: If deps are provided, should we skip comparing the ref itself?\n\n\n  var effectDeps = deps !== null && deps !== undefined ? deps.concat([ref]) : null;\n  return updateEffectImpl(Update, Layout, imperativeHandleEffect.bind(null, create, ref), effectDeps);\n}\n\nfunction mountDebugValue(value, formatterFn) {// This hook is normally a no-op.\n  // The react-debug-hooks package injects its own implementation\n  // so that e.g. DevTools can display custom hook values.\n}\n\nvar updateDebugValue = mountDebugValue;\n\nfunction mountCallback(callback, deps) {\n  var hook = mountWorkInProgressHook();\n  var nextDeps = deps === undefined ? null : deps;\n  hook.memoizedState = [callback, nextDeps];\n  return callback;\n}\n\nfunction updateCallback(callback, deps) {\n  var hook = updateWorkInProgressHook();\n  var nextDeps = deps === undefined ? null : deps;\n  var prevState = hook.memoizedState;\n\n  if (prevState !== null) {\n    if (nextDeps !== null) {\n      var prevDeps = prevState[1];\n\n      if (areHookInputsEqual(nextDeps, prevDeps)) {\n        return prevState[0];\n      }\n    }\n  }\n\n  hook.memoizedState = [callback, nextDeps];\n  return callback;\n}\n\nfunction mountMemo(nextCreate, deps) {\n  var hook = mountWorkInProgressHook();\n  var nextDeps = deps === undefined ? null : deps;\n  var nextValue = nextCreate();\n  hook.memoizedState = [nextValue, nextDeps];\n  return nextValue;\n}\n\nfunction updateMemo(nextCreate, deps) {\n  var hook = updateWorkInProgressHook();\n  var nextDeps = deps === undefined ? null : deps;\n  var prevState = hook.memoizedState;\n\n  if (prevState !== null) {\n    // Assume these are defined. If they're not, areHookInputsEqual will warn.\n    if (nextDeps !== null) {\n      var prevDeps = prevState[1];\n\n      if (areHookInputsEqual(nextDeps, prevDeps)) {\n        return prevState[0];\n      }\n    }\n  }\n\n  var nextValue = nextCreate();\n  hook.memoizedState = [nextValue, nextDeps];\n  return nextValue;\n}\n\nfunction mountDeferredValue(value) {\n  var _mountState = mountState(value),\n      prevValue = _mountState[0],\n      setValue = _mountState[1];\n\n  mountEffect(function () {\n    var prevTransition = ReactCurrentBatchConfig$1.transition;\n    ReactCurrentBatchConfig$1.transition = 1;\n\n    try {\n      setValue(value);\n    } finally {\n      ReactCurrentBatchConfig$1.transition = prevTransition;\n    }\n  }, [value]);\n  return prevValue;\n}\n\nfunction updateDeferredValue(value) {\n  var _updateState = updateState(),\n      prevValue = _updateState[0],\n      setValue = _updateState[1];\n\n  updateEffect(function () {\n    var prevTransition = ReactCurrentBatchConfig$1.transition;\n    ReactCurrentBatchConfig$1.transition = 1;\n\n    try {\n      setValue(value);\n    } finally {\n      ReactCurrentBatchConfig$1.transition = prevTransition;\n    }\n  }, [value]);\n  return prevValue;\n}\n\nfunction rerenderDeferredValue(value) {\n  var _rerenderState = rerenderState(),\n      prevValue = _rerenderState[0],\n      setValue = _rerenderState[1];\n\n  updateEffect(function () {\n    var prevTransition = ReactCurrentBatchConfig$1.transition;\n    ReactCurrentBatchConfig$1.transition = 1;\n\n    try {\n      setValue(value);\n    } finally {\n      ReactCurrentBatchConfig$1.transition = prevTransition;\n    }\n  }, [value]);\n  return prevValue;\n}\n\nfunction startTransition(setPending, callback) {\n  var priorityLevel = getCurrentPriorityLevel();\n\n  {\n    runWithPriority$1(priorityLevel < UserBlockingPriority$2 ? UserBlockingPriority$2 : priorityLevel, function () {\n      setPending(true);\n    });\n    runWithPriority$1(priorityLevel > NormalPriority$1 ? NormalPriority$1 : priorityLevel, function () {\n      var prevTransition = ReactCurrentBatchConfig$1.transition;\n      ReactCurrentBatchConfig$1.transition = 1;\n\n      try {\n        setPending(false);\n        callback();\n      } finally {\n        ReactCurrentBatchConfig$1.transition = prevTransition;\n      }\n    });\n  }\n}\n\nfunction mountTransition() {\n  var _mountState2 = mountState(false),\n      isPending = _mountState2[0],\n      setPending = _mountState2[1]; // The `start` method can be stored on a ref, since `setPending`\n  // never changes.\n\n\n  var start = startTransition.bind(null, setPending);\n  mountRef(start);\n  return [start, isPending];\n}\n\nfunction updateTransition() {\n  var _updateState2 = updateState(),\n      isPending = _updateState2[0];\n\n  var startRef = updateRef();\n  var start = startRef.current;\n  return [start, isPending];\n}\n\nfunction rerenderTransition() {\n  var _rerenderState2 = rerenderState(),\n      isPending = _rerenderState2[0];\n\n  var startRef = updateRef();\n  var start = startRef.current;\n  return [start, isPending];\n}\n\nvar isUpdatingOpaqueValueInRenderPhase = false;\nfunction getIsUpdatingOpaqueValueInRenderPhaseInDEV() {\n  {\n    return isUpdatingOpaqueValueInRenderPhase;\n  }\n}\n\nfunction warnOnOpaqueIdentifierAccessInDEV(fiber) {\n  {\n    // TODO: Should warn in effects and callbacks, too\n    var name = getComponentName(fiber.type) || 'Unknown';\n\n    if (getIsRendering() && !didWarnAboutUseOpaqueIdentifier[name]) {\n      error('The object passed back from useOpaqueIdentifier is meant to be ' + 'passed through to attributes only. Do not read the ' + 'value directly.');\n\n      didWarnAboutUseOpaqueIdentifier[name] = true;\n    }\n  }\n}\n\nfunction mountOpaqueIdentifier() {\n  var makeId =  makeClientIdInDEV.bind(null, warnOnOpaqueIdentifierAccessInDEV.bind(null, currentlyRenderingFiber$1)) ;\n\n  if (getIsHydrating()) {\n    var didUpgrade = false;\n    var fiber = currentlyRenderingFiber$1;\n\n    var readValue = function () {\n      if (!didUpgrade) {\n        // Only upgrade once. This works even inside the render phase because\n        // the update is added to a shared queue, which outlasts the\n        // in-progress render.\n        didUpgrade = true;\n\n        {\n          isUpdatingOpaqueValueInRenderPhase = true;\n          setId(makeId());\n          isUpdatingOpaqueValueInRenderPhase = false;\n          warnOnOpaqueIdentifierAccessInDEV(fiber);\n        }\n      }\n\n      {\n        {\n          throw Error( \"The object passed back from useOpaqueIdentifier is meant to be passed through to attributes only. Do not read the value directly.\" );\n        }\n      }\n    };\n\n    var id = makeOpaqueHydratingObject(readValue);\n    var setId = mountState(id)[1];\n\n    if ((currentlyRenderingFiber$1.mode & BlockingMode) === NoMode) {\n      currentlyRenderingFiber$1.flags |= Update | Passive;\n      pushEffect(HasEffect | Passive$1, function () {\n        setId(makeId());\n      }, undefined, null);\n    }\n\n    return id;\n  } else {\n    var _id = makeId();\n\n    mountState(_id);\n    return _id;\n  }\n}\n\nfunction updateOpaqueIdentifier() {\n  var id = updateState()[0];\n  return id;\n}\n\nfunction rerenderOpaqueIdentifier() {\n  var id = rerenderState()[0];\n  return id;\n}\n\nfunction dispatchAction(fiber, queue, action) {\n  {\n    if (typeof arguments[3] === 'function') {\n      error(\"State updates from the useState() and useReducer() Hooks don't support the \" + 'second callback argument. To execute a side effect after ' + 'rendering, declare it in the component body with useEffect().');\n    }\n  }\n\n  var eventTime = requestEventTime();\n  var lane = requestUpdateLane(fiber);\n  var update = {\n    lane: lane,\n    action: action,\n    eagerReducer: null,\n    eagerState: null,\n    next: null\n  }; // Append the update to the end of the list.\n\n  var pending = queue.pending;\n\n  if (pending === null) {\n    // This is the first update. Create a circular list.\n    update.next = update;\n  } else {\n    update.next = pending.next;\n    pending.next = update;\n  }\n\n  queue.pending = update;\n  var alternate = fiber.alternate;\n\n  if (fiber === currentlyRenderingFiber$1 || alternate !== null && alternate === currentlyRenderingFiber$1) {\n    // This is a render phase update. Stash it in a lazily-created map of\n    // queue -> linked list of updates. After this render pass, we'll restart\n    // and apply the stashed updates on top of the work-in-progress hook.\n    didScheduleRenderPhaseUpdateDuringThisPass = didScheduleRenderPhaseUpdate = true;\n  } else {\n    if (fiber.lanes === NoLanes && (alternate === null || alternate.lanes === NoLanes)) {\n      // The queue is currently empty, which means we can eagerly compute the\n      // next state before entering the render phase. If the new state is the\n      // same as the current state, we may be able to bail out entirely.\n      var lastRenderedReducer = queue.lastRenderedReducer;\n\n      if (lastRenderedReducer !== null) {\n        var prevDispatcher;\n\n        {\n          prevDispatcher = ReactCurrentDispatcher$1.current;\n          ReactCurrentDispatcher$1.current = InvalidNestedHooksDispatcherOnUpdateInDEV;\n        }\n\n        try {\n          var currentState = queue.lastRenderedState;\n          var eagerState = lastRenderedReducer(currentState, action); // Stash the eagerly computed state, and the reducer used to compute\n          // it, on the update object. If the reducer hasn't changed by the\n          // time we enter the render phase, then the eager state can be used\n          // without calling the reducer again.\n\n          update.eagerReducer = lastRenderedReducer;\n          update.eagerState = eagerState;\n\n          if (objectIs(eagerState, currentState)) {\n            // Fast path. We can bail out without scheduling React to re-render.\n            // It's still possible that we'll need to rebase this update later,\n            // if the component re-renders for a different reason and by that\n            // time the reducer has changed.\n            return;\n          }\n        } catch (error) {// Suppress the error. It will throw again in the render phase.\n        } finally {\n          {\n            ReactCurrentDispatcher$1.current = prevDispatcher;\n          }\n        }\n      }\n    }\n\n    {\n      // $FlowExpectedError - jest isn't a global, and isn't recognized outside of tests\n      if ('undefined' !== typeof jest) {\n        warnIfNotScopedWithMatchingAct(fiber);\n        warnIfNotCurrentlyActingUpdatesInDev(fiber);\n      }\n    }\n\n    scheduleUpdateOnFiber(fiber, lane, eventTime);\n  }\n}\n\nvar ContextOnlyDispatcher = {\n  readContext: readContext,\n  useCallback: throwInvalidHookError,\n  useContext: throwInvalidHookError,\n  useEffect: throwInvalidHookError,\n  useImperativeHandle: throwInvalidHookError,\n  useLayoutEffect: throwInvalidHookError,\n  useMemo: throwInvalidHookError,\n  useReducer: throwInvalidHookError,\n  useRef: throwInvalidHookError,\n  useState: throwInvalidHookError,\n  useDebugValue: throwInvalidHookError,\n  useDeferredValue: throwInvalidHookError,\n  useTransition: throwInvalidHookError,\n  useMutableSource: throwInvalidHookError,\n  useOpaqueIdentifier: throwInvalidHookError,\n  unstable_isNewReconciler: enableNewReconciler\n};\nvar HooksDispatcherOnMountInDEV = null;\nvar HooksDispatcherOnMountWithHookTypesInDEV = null;\nvar HooksDispatcherOnUpdateInDEV = null;\nvar HooksDispatcherOnRerenderInDEV = null;\nvar InvalidNestedHooksDispatcherOnMountInDEV = null;\nvar InvalidNestedHooksDispatcherOnUpdateInDEV = null;\nvar InvalidNestedHooksDispatcherOnRerenderInDEV = null;\n\n{\n  var warnInvalidContextAccess = function () {\n    error('Context can only be read while React is rendering. ' + 'In classes, you can read it in the render method or getDerivedStateFromProps. ' + 'In function components, you can read it directly in the function body, but not ' + 'inside Hooks like useReducer() or useMemo().');\n  };\n\n  var warnInvalidHookAccess = function () {\n    error('Do not call Hooks inside useEffect(...), useMemo(...), or other built-in Hooks. ' + 'You can only call Hooks at the top level of your React function. ' + 'For more information, see ' + 'https://reactjs.org/link/rules-of-hooks');\n  };\n\n  HooksDispatcherOnMountInDEV = {\n    readContext: function (context, observedBits) {\n      return readContext(context, observedBits);\n    },\n    useCallback: function (callback, deps) {\n      currentHookNameInDev = 'useCallback';\n      mountHookTypesDev();\n      checkDepsAreArrayDev(deps);\n      return mountCallback(callback, deps);\n    },\n    useContext: function (context, observedBits) {\n      currentHookNameInDev = 'useContext';\n      mountHookTypesDev();\n      return readContext(context, observedBits);\n    },\n    useEffect: function (create, deps) {\n      currentHookNameInDev = 'useEffect';\n      mountHookTypesDev();\n      checkDepsAreArrayDev(deps);\n      return mountEffect(create, deps);\n    },\n    useImperativeHandle: function (ref, create, deps) {\n      currentHookNameInDev = 'useImperativeHandle';\n      mountHookTypesDev();\n      checkDepsAreArrayDev(deps);\n      return mountImperativeHandle(ref, create, deps);\n    },\n    useLayoutEffect: function (create, deps) {\n      currentHookNameInDev = 'useLayoutEffect';\n      mountHookTypesDev();\n      checkDepsAreArrayDev(deps);\n      return mountLayoutEffect(create, deps);\n    },\n    useMemo: function (create, deps) {\n      currentHookNameInDev = 'useMemo';\n      mountHookTypesDev();\n      checkDepsAreArrayDev(deps);\n      var prevDispatcher = ReactCurrentDispatcher$1.current;\n      ReactCurrentDispatcher$1.current = InvalidNestedHooksDispatcherOnMountInDEV;\n\n      try {\n        return mountMemo(create, deps);\n      } finally {\n        ReactCurrentDispatcher$1.current = prevDispatcher;\n      }\n    },\n    useReducer: function (reducer, initialArg, init) {\n      currentHookNameInDev = 'useReducer';\n      mountHookTypesDev();\n      var prevDispatcher = ReactCurrentDispatcher$1.current;\n      ReactCurrentDispatcher$1.current = InvalidNestedHooksDispatcherOnMountInDEV;\n\n      try {\n        return mountReducer(reducer, initialArg, init);\n      } finally {\n        ReactCurrentDispatcher$1.current = prevDispatcher;\n      }\n    },\n    useRef: function (initialValue) {\n      currentHookNameInDev = 'useRef';\n      mountHookTypesDev();\n      return mountRef(initialValue);\n    },\n    useState: function (initialState) {\n      currentHookNameInDev = 'useState';\n      mountHookTypesDev();\n      var prevDispatcher = ReactCurrentDispatcher$1.current;\n      ReactCurrentDispatcher$1.current = InvalidNestedHooksDispatcherOnMountInDEV;\n\n      try {\n        return mountState(initialState);\n      } finally {\n        ReactCurrentDispatcher$1.current = prevDispatcher;\n      }\n    },\n    useDebugValue: function (value, formatterFn) {\n      currentHookNameInDev = 'useDebugValue';\n      mountHookTypesDev();\n      return mountDebugValue();\n    },\n    useDeferredValue: function (value) {\n      currentHookNameInDev = 'useDeferredValue';\n      mountHookTypesDev();\n      return mountDeferredValue(value);\n    },\n    useTransition: function () {\n      currentHookNameInDev = 'useTransition';\n      mountHookTypesDev();\n      return mountTransition();\n    },\n    useMutableSource: function (source, getSnapshot, subscribe) {\n      currentHookNameInDev = 'useMutableSource';\n      mountHookTypesDev();\n      return mountMutableSource(source, getSnapshot, subscribe);\n    },\n    useOpaqueIdentifier: function () {\n      currentHookNameInDev = 'useOpaqueIdentifier';\n      mountHookTypesDev();\n      return mountOpaqueIdentifier();\n    },\n    unstable_isNewReconciler: enableNewReconciler\n  };\n  HooksDispatcherOnMountWithHookTypesInDEV = {\n    readContext: function (context, observedBits) {\n      return readContext(context, observedBits);\n    },\n    useCallback: function (callback, deps) {\n      currentHookNameInDev = 'useCallback';\n      updateHookTypesDev();\n      return mountCallback(callback, deps);\n    },\n    useContext: function (context, observedBits) {\n      currentHookNameInDev = 'useContext';\n      updateHookTypesDev();\n      return readContext(context, observedBits);\n    },\n    useEffect: function (create, deps) {\n      currentHookNameInDev = 'useEffect';\n      updateHookTypesDev();\n      return mountEffect(create, deps);\n    },\n    useImperativeHandle: function (ref, create, deps) {\n      currentHookNameInDev = 'useImperativeHandle';\n      updateHookTypesDev();\n      return mountImperativeHandle(ref, create, deps);\n    },\n    useLayoutEffect: function (create, deps) {\n      currentHookNameInDev = 'useLayoutEffect';\n      updateHookTypesDev();\n      return mountLayoutEffect(create, deps);\n    },\n    useMemo: function (create, deps) {\n      currentHookNameInDev = 'useMemo';\n      updateHookTypesDev();\n      var prevDispatcher = ReactCurrentDispatcher$1.current;\n      ReactCurrentDispatcher$1.current = InvalidNestedHooksDispatcherOnMountInDEV;\n\n      try {\n        return mountMemo(create, deps);\n      } finally {\n        ReactCurrentDispatcher$1.current = prevDispatcher;\n      }\n    },\n    useReducer: function (reducer, initialArg, init) {\n      currentHookNameInDev = 'useReducer';\n      updateHookTypesDev();\n      var prevDispatcher = ReactCurrentDispatcher$1.current;\n      ReactCurrentDispatcher$1.current = InvalidNestedHooksDispatcherOnMountInDEV;\n\n      try {\n        return mountReducer(reducer, initialArg, init);\n      } finally {\n        ReactCurrentDispatcher$1.current = prevDispatcher;\n      }\n    },\n    useRef: function (initialValue) {\n      currentHookNameInDev = 'useRef';\n      updateHookTypesDev();\n      return mountRef(initialValue);\n    },\n    useState: function (initialState) {\n      currentHookNameInDev = 'useState';\n      updateHookTypesDev();\n      var prevDispatcher = ReactCurrentDispatcher$1.current;\n      ReactCurrentDispatcher$1.current = InvalidNestedHooksDispatcherOnMountInDEV;\n\n      try {\n        return mountState(initialState);\n      } finally {\n        ReactCurrentDispatcher$1.current = prevDispatcher;\n      }\n    },\n    useDebugValue: function (value, formatterFn) {\n      currentHookNameInDev = 'useDebugValue';\n      updateHookTypesDev();\n      return mountDebugValue();\n    },\n    useDeferredValue: function (value) {\n      currentHookNameInDev = 'useDeferredValue';\n      updateHookTypesDev();\n      return mountDeferredValue(value);\n    },\n    useTransition: function () {\n      currentHookNameInDev = 'useTransition';\n      updateHookTypesDev();\n      return mountTransition();\n    },\n    useMutableSource: function (source, getSnapshot, subscribe) {\n      currentHookNameInDev = 'useMutableSource';\n      updateHookTypesDev();\n      return mountMutableSource(source, getSnapshot, subscribe);\n    },\n    useOpaqueIdentifier: function () {\n      currentHookNameInDev = 'useOpaqueIdentifier';\n      updateHookTypesDev();\n      return mountOpaqueIdentifier();\n    },\n    unstable_isNewReconciler: enableNewReconciler\n  };\n  HooksDispatcherOnUpdateInDEV = {\n    readContext: function (context, observedBits) {\n      return readContext(context, observedBits);\n    },\n    useCallback: function (callback, deps) {\n      currentHookNameInDev = 'useCallback';\n      updateHookTypesDev();\n      return updateCallback(callback, deps);\n    },\n    useContext: function (context, observedBits) {\n      currentHookNameInDev = 'useContext';\n      updateHookTypesDev();\n      return readContext(context, observedBits);\n    },\n    useEffect: function (create, deps) {\n      currentHookNameInDev = 'useEffect';\n      updateHookTypesDev();\n      return updateEffect(create, deps);\n    },\n    useImperativeHandle: function (ref, create, deps) {\n      currentHookNameInDev = 'useImperativeHandle';\n      updateHookTypesDev();\n      return updateImperativeHandle(ref, create, deps);\n    },\n    useLayoutEffect: function (create, deps) {\n      currentHookNameInDev = 'useLayoutEffect';\n      updateHookTypesDev();\n      return updateLayoutEffect(create, deps);\n    },\n    useMemo: function (create, deps) {\n      currentHookNameInDev = 'useMemo';\n      updateHookTypesDev();\n      var prevDispatcher = ReactCurrentDispatcher$1.current;\n      ReactCurrentDispatcher$1.current = InvalidNestedHooksDispatcherOnUpdateInDEV;\n\n      try {\n        return updateMemo(create, deps);\n      } finally {\n        ReactCurrentDispatcher$1.current = prevDispatcher;\n      }\n    },\n    useReducer: function (reducer, initialArg, init) {\n      currentHookNameInDev = 'useReducer';\n      updateHookTypesDev();\n      var prevDispatcher = ReactCurrentDispatcher$1.current;\n      ReactCurrentDispatcher$1.current = InvalidNestedHooksDispatcherOnUpdateInDEV;\n\n      try {\n        return updateReducer(reducer, initialArg, init);\n      } finally {\n        ReactCurrentDispatcher$1.current = prevDispatcher;\n      }\n    },\n    useRef: function (initialValue) {\n      currentHookNameInDev = 'useRef';\n      updateHookTypesDev();\n      return updateRef();\n    },\n    useState: function (initialState) {\n      currentHookNameInDev = 'useState';\n      updateHookTypesDev();\n      var prevDispatcher = ReactCurrentDispatcher$1.current;\n      ReactCurrentDispatcher$1.current = InvalidNestedHooksDispatcherOnUpdateInDEV;\n\n      try {\n        return updateState(initialState);\n      } finally {\n        ReactCurrentDispatcher$1.current = prevDispatcher;\n      }\n    },\n    useDebugValue: function (value, formatterFn) {\n      currentHookNameInDev = 'useDebugValue';\n      updateHookTypesDev();\n      return updateDebugValue();\n    },\n    useDeferredValue: function (value) {\n      currentHookNameInDev = 'useDeferredValue';\n      updateHookTypesDev();\n      return updateDeferredValue(value);\n    },\n    useTransition: function () {\n      currentHookNameInDev = 'useTransition';\n      updateHookTypesDev();\n      return updateTransition();\n    },\n    useMutableSource: function (source, getSnapshot, subscribe) {\n      currentHookNameInDev = 'useMutableSource';\n      updateHookTypesDev();\n      return updateMutableSource(source, getSnapshot, subscribe);\n    },\n    useOpaqueIdentifier: function () {\n      currentHookNameInDev = 'useOpaqueIdentifier';\n      updateHookTypesDev();\n      return updateOpaqueIdentifier();\n    },\n    unstable_isNewReconciler: enableNewReconciler\n  };\n  HooksDispatcherOnRerenderInDEV = {\n    readContext: function (context, observedBits) {\n      return readContext(context, observedBits);\n    },\n    useCallback: function (callback, deps) {\n      currentHookNameInDev = 'useCallback';\n      updateHookTypesDev();\n      return updateCallback(callback, deps);\n    },\n    useContext: function (context, observedBits) {\n      currentHookNameInDev = 'useContext';\n      updateHookTypesDev();\n      return readContext(context, observedBits);\n    },\n    useEffect: function (create, deps) {\n      currentHookNameInDev = 'useEffect';\n      updateHookTypesDev();\n      return updateEffect(create, deps);\n    },\n    useImperativeHandle: function (ref, create, deps) {\n      currentHookNameInDev = 'useImperativeHandle';\n      updateHookTypesDev();\n      return updateImperativeHandle(ref, create, deps);\n    },\n    useLayoutEffect: function (create, deps) {\n      currentHookNameInDev = 'useLayoutEffect';\n      updateHookTypesDev();\n      return updateLayoutEffect(create, deps);\n    },\n    useMemo: function (create, deps) {\n      currentHookNameInDev = 'useMemo';\n      updateHookTypesDev();\n      var prevDispatcher = ReactCurrentDispatcher$1.current;\n      ReactCurrentDispatcher$1.current = InvalidNestedHooksDispatcherOnRerenderInDEV;\n\n      try {\n        return updateMemo(create, deps);\n      } finally {\n        ReactCurrentDispatcher$1.current = prevDispatcher;\n      }\n    },\n    useReducer: function (reducer, initialArg, init) {\n      currentHookNameInDev = 'useReducer';\n      updateHookTypesDev();\n      var prevDispatcher = ReactCurrentDispatcher$1.current;\n      ReactCurrentDispatcher$1.current = InvalidNestedHooksDispatcherOnRerenderInDEV;\n\n      try {\n        return rerenderReducer(reducer, initialArg, init);\n      } finally {\n        ReactCurrentDispatcher$1.current = prevDispatcher;\n      }\n    },\n    useRef: function (initialValue) {\n      currentHookNameInDev = 'useRef';\n      updateHookTypesDev();\n      return updateRef();\n    },\n    useState: function (initialState) {\n      currentHookNameInDev = 'useState';\n      updateHookTypesDev();\n      var prevDispatcher = ReactCurrentDispatcher$1.current;\n      ReactCurrentDispatcher$1.current = InvalidNestedHooksDispatcherOnRerenderInDEV;\n\n      try {\n        return rerenderState(initialState);\n      } finally {\n        ReactCurrentDispatcher$1.current = prevDispatcher;\n      }\n    },\n    useDebugValue: function (value, formatterFn) {\n      currentHookNameInDev = 'useDebugValue';\n      updateHookTypesDev();\n      return updateDebugValue();\n    },\n    useDeferredValue: function (value) {\n      currentHookNameInDev = 'useDeferredValue';\n      updateHookTypesDev();\n      return rerenderDeferredValue(value);\n    },\n    useTransition: function () {\n      currentHookNameInDev = 'useTransition';\n      updateHookTypesDev();\n      return rerenderTransition();\n    },\n    useMutableSource: function (source, getSnapshot, subscribe) {\n      currentHookNameInDev = 'useMutableSource';\n      updateHookTypesDev();\n      return updateMutableSource(source, getSnapshot, subscribe);\n    },\n    useOpaqueIdentifier: function () {\n      currentHookNameInDev = 'useOpaqueIdentifier';\n      updateHookTypesDev();\n      return rerenderOpaqueIdentifier();\n    },\n    unstable_isNewReconciler: enableNewReconciler\n  };\n  InvalidNestedHooksDispatcherOnMountInDEV = {\n    readContext: function (context, observedBits) {\n      warnInvalidContextAccess();\n      return readContext(context, observedBits);\n    },\n    useCallback: function (callback, deps) {\n      currentHookNameInDev = 'useCallback';\n      warnInvalidHookAccess();\n      mountHookTypesDev();\n      return mountCallback(callback, deps);\n    },\n    useContext: function (context, observedBits) {\n      currentHookNameInDev = 'useContext';\n      warnInvalidHookAccess();\n      mountHookTypesDev();\n      return readContext(context, observedBits);\n    },\n    useEffect: function (create, deps) {\n      currentHookNameInDev = 'useEffect';\n      warnInvalidHookAccess();\n      mountHookTypesDev();\n      return mountEffect(create, deps);\n    },\n    useImperativeHandle: function (ref, create, deps) {\n      currentHookNameInDev = 'useImperativeHandle';\n      warnInvalidHookAccess();\n      mountHookTypesDev();\n      return mountImperativeHandle(ref, create, deps);\n    },\n    useLayoutEffect: function (create, deps) {\n      currentHookNameInDev = 'useLayoutEffect';\n      warnInvalidHookAccess();\n      mountHookTypesDev();\n      return mountLayoutEffect(create, deps);\n    },\n    useMemo: function (create, deps) {\n      currentHookNameInDev = 'useMemo';\n      warnInvalidHookAccess();\n      mountHookTypesDev();\n      var prevDispatcher = ReactCurrentDispatcher$1.current;\n      ReactCurrentDispatcher$1.current = InvalidNestedHooksDispatcherOnMountInDEV;\n\n      try {\n        return mountMemo(create, deps);\n      } finally {\n        ReactCurrentDispatcher$1.current = prevDispatcher;\n      }\n    },\n    useReducer: function (reducer, initialArg, init) {\n      currentHookNameInDev = 'useReducer';\n      warnInvalidHookAccess();\n      mountHookTypesDev();\n      var prevDispatcher = ReactCurrentDispatcher$1.current;\n      ReactCurrentDispatcher$1.current = InvalidNestedHooksDispatcherOnMountInDEV;\n\n      try {\n        return mountReducer(reducer, initialArg, init);\n      } finally {\n        ReactCurrentDispatcher$1.current = prevDispatcher;\n      }\n    },\n    useRef: function (initialValue) {\n      currentHookNameInDev = 'useRef';\n      warnInvalidHookAccess();\n      mountHookTypesDev();\n      return mountRef(initialValue);\n    },\n    useState: function (initialState) {\n      currentHookNameInDev = 'useState';\n      warnInvalidHookAccess();\n      mountHookTypesDev();\n      var prevDispatcher = ReactCurrentDispatcher$1.current;\n      ReactCurrentDispatcher$1.current = InvalidNestedHooksDispatcherOnMountInDEV;\n\n      try {\n        return mountState(initialState);\n      } finally {\n        ReactCurrentDispatcher$1.current = prevDispatcher;\n      }\n    },\n    useDebugValue: function (value, formatterFn) {\n      currentHookNameInDev = 'useDebugValue';\n      warnInvalidHookAccess();\n      mountHookTypesDev();\n      return mountDebugValue();\n    },\n    useDeferredValue: function (value) {\n      currentHookNameInDev = 'useDeferredValue';\n      warnInvalidHookAccess();\n      mountHookTypesDev();\n      return mountDeferredValue(value);\n    },\n    useTransition: function () {\n      currentHookNameInDev = 'useTransition';\n      warnInvalidHookAccess();\n      mountHookTypesDev();\n      return mountTransition();\n    },\n    useMutableSource: function (source, getSnapshot, subscribe) {\n      currentHookNameInDev = 'useMutableSource';\n      warnInvalidHookAccess();\n      mountHookTypesDev();\n      return mountMutableSource(source, getSnapshot, subscribe);\n    },\n    useOpaqueIdentifier: function () {\n      currentHookNameInDev = 'useOpaqueIdentifier';\n      warnInvalidHookAccess();\n      mountHookTypesDev();\n      return mountOpaqueIdentifier();\n    },\n    unstable_isNewReconciler: enableNewReconciler\n  };\n  InvalidNestedHooksDispatcherOnUpdateInDEV = {\n    readContext: function (context, observedBits) {\n      warnInvalidContextAccess();\n      return readContext(context, observedBits);\n    },\n    useCallback: function (callback, deps) {\n      currentHookNameInDev = 'useCallback';\n      warnInvalidHookAccess();\n      updateHookTypesDev();\n      return updateCallback(callback, deps);\n    },\n    useContext: function (context, observedBits) {\n      currentHookNameInDev = 'useContext';\n      warnInvalidHookAccess();\n      updateHookTypesDev();\n      return readContext(context, observedBits);\n    },\n    useEffect: function (create, deps) {\n      currentHookNameInDev = 'useEffect';\n      warnInvalidHookAccess();\n      updateHookTypesDev();\n      return updateEffect(create, deps);\n    },\n    useImperativeHandle: function (ref, create, deps) {\n      currentHookNameInDev = 'useImperativeHandle';\n      warnInvalidHookAccess();\n      updateHookTypesDev();\n      return updateImperativeHandle(ref, create, deps);\n    },\n    useLayoutEffect: function (create, deps) {\n      currentHookNameInDev = 'useLayoutEffect';\n      warnInvalidHookAccess();\n      updateHookTypesDev();\n      return updateLayoutEffect(create, deps);\n    },\n    useMemo: function (create, deps) {\n      currentHookNameInDev = 'useMemo';\n      warnInvalidHookAccess();\n      updateHookTypesDev();\n      var prevDispatcher = ReactCurrentDispatcher$1.current;\n      ReactCurrentDispatcher$1.current = InvalidNestedHooksDispatcherOnUpdateInDEV;\n\n      try {\n        return updateMemo(create, deps);\n      } finally {\n        ReactCurrentDispatcher$1.current = prevDispatcher;\n      }\n    },\n    useReducer: function (reducer, initialArg, init) {\n      currentHookNameInDev = 'useReducer';\n      warnInvalidHookAccess();\n      updateHookTypesDev();\n      var prevDispatcher = ReactCurrentDispatcher$1.current;\n      ReactCurrentDispatcher$1.current = InvalidNestedHooksDispatcherOnUpdateInDEV;\n\n      try {\n        return updateReducer(reducer, initialArg, init);\n      } finally {\n        ReactCurrentDispatcher$1.current = prevDispatcher;\n      }\n    },\n    useRef: function (initialValue) {\n      currentHookNameInDev = 'useRef';\n      warnInvalidHookAccess();\n      updateHookTypesDev();\n      return updateRef();\n    },\n    useState: function (initialState) {\n      currentHookNameInDev = 'useState';\n      warnInvalidHookAccess();\n      updateHookTypesDev();\n      var prevDispatcher = ReactCurrentDispatcher$1.current;\n      ReactCurrentDispatcher$1.current = InvalidNestedHooksDispatcherOnUpdateInDEV;\n\n      try {\n        return updateState(initialState);\n      } finally {\n        ReactCurrentDispatcher$1.current = prevDispatcher;\n      }\n    },\n    useDebugValue: function (value, formatterFn) {\n      currentHookNameInDev = 'useDebugValue';\n      warnInvalidHookAccess();\n      updateHookTypesDev();\n      return updateDebugValue();\n    },\n    useDeferredValue: function (value) {\n      currentHookNameInDev = 'useDeferredValue';\n      warnInvalidHookAccess();\n      updateHookTypesDev();\n      return updateDeferredValue(value);\n    },\n    useTransition: function () {\n      currentHookNameInDev = 'useTransition';\n      warnInvalidHookAccess();\n      updateHookTypesDev();\n      return updateTransition();\n    },\n    useMutableSource: function (source, getSnapshot, subscribe) {\n      currentHookNameInDev = 'useMutableSource';\n      warnInvalidHookAccess();\n      updateHookTypesDev();\n      return updateMutableSource(source, getSnapshot, subscribe);\n    },\n    useOpaqueIdentifier: function () {\n      currentHookNameInDev = 'useOpaqueIdentifier';\n      warnInvalidHookAccess();\n      updateHookTypesDev();\n      return updateOpaqueIdentifier();\n    },\n    unstable_isNewReconciler: enableNewReconciler\n  };\n  InvalidNestedHooksDispatcherOnRerenderInDEV = {\n    readContext: function (context, observedBits) {\n      warnInvalidContextAccess();\n      return readContext(context, observedBits);\n    },\n    useCallback: function (callback, deps) {\n      currentHookNameInDev = 'useCallback';\n      warnInvalidHookAccess();\n      updateHookTypesDev();\n      return updateCallback(callback, deps);\n    },\n    useContext: function (context, observedBits) {\n      currentHookNameInDev = 'useContext';\n      warnInvalidHookAccess();\n      updateHookTypesDev();\n      return readContext(context, observedBits);\n    },\n    useEffect: function (create, deps) {\n      currentHookNameInDev = 'useEffect';\n      warnInvalidHookAccess();\n      updateHookTypesDev();\n      return updateEffect(create, deps);\n    },\n    useImperativeHandle: function (ref, create, deps) {\n      currentHookNameInDev = 'useImperativeHandle';\n      warnInvalidHookAccess();\n      updateHookTypesDev();\n      return updateImperativeHandle(ref, create, deps);\n    },\n    useLayoutEffect: function (create, deps) {\n      currentHookNameInDev = 'useLayoutEffect';\n      warnInvalidHookAccess();\n      updateHookTypesDev();\n      return updateLayoutEffect(create, deps);\n    },\n    useMemo: function (create, deps) {\n      currentHookNameInDev = 'useMemo';\n      warnInvalidHookAccess();\n      updateHookTypesDev();\n      var prevDispatcher = ReactCurrentDispatcher$1.current;\n      ReactCurrentDispatcher$1.current = InvalidNestedHooksDispatcherOnUpdateInDEV;\n\n      try {\n        return updateMemo(create, deps);\n      } finally {\n        ReactCurrentDispatcher$1.current = prevDispatcher;\n      }\n    },\n    useReducer: function (reducer, initialArg, init) {\n      currentHookNameInDev = 'useReducer';\n      warnInvalidHookAccess();\n      updateHookTypesDev();\n      var prevDispatcher = ReactCurrentDispatcher$1.current;\n      ReactCurrentDispatcher$1.current = InvalidNestedHooksDispatcherOnUpdateInDEV;\n\n      try {\n        return rerenderReducer(reducer, initialArg, init);\n      } finally {\n        ReactCurrentDispatcher$1.current = prevDispatcher;\n      }\n    },\n    useRef: function (initialValue) {\n      currentHookNameInDev = 'useRef';\n      warnInvalidHookAccess();\n      updateHookTypesDev();\n      return updateRef();\n    },\n    useState: function (initialState) {\n      currentHookNameInDev = 'useState';\n      warnInvalidHookAccess();\n      updateHookTypesDev();\n      var prevDispatcher = ReactCurrentDispatcher$1.current;\n      ReactCurrentDispatcher$1.current = InvalidNestedHooksDispatcherOnUpdateInDEV;\n\n      try {\n        return rerenderState(initialState);\n      } finally {\n        ReactCurrentDispatcher$1.current = prevDispatcher;\n      }\n    },\n    useDebugValue: function (value, formatterFn) {\n      currentHookNameInDev = 'useDebugValue';\n      warnInvalidHookAccess();\n      updateHookTypesDev();\n      return updateDebugValue();\n    },\n    useDeferredValue: function (value) {\n      currentHookNameInDev = 'useDeferredValue';\n      warnInvalidHookAccess();\n      updateHookTypesDev();\n      return rerenderDeferredValue(value);\n    },\n    useTransition: function () {\n      currentHookNameInDev = 'useTransition';\n      warnInvalidHookAccess();\n      updateHookTypesDev();\n      return rerenderTransition();\n    },\n    useMutableSource: function (source, getSnapshot, subscribe) {\n      currentHookNameInDev = 'useMutableSource';\n      warnInvalidHookAccess();\n      updateHookTypesDev();\n      return updateMutableSource(source, getSnapshot, subscribe);\n    },\n    useOpaqueIdentifier: function () {\n      currentHookNameInDev = 'useOpaqueIdentifier';\n      warnInvalidHookAccess();\n      updateHookTypesDev();\n      return rerenderOpaqueIdentifier();\n    },\n    unstable_isNewReconciler: enableNewReconciler\n  };\n}\n\nvar now$1 = Scheduler.unstable_now;\nvar commitTime = 0;\nvar profilerStartTime = -1;\n\nfunction getCommitTime() {\n  return commitTime;\n}\n\nfunction recordCommitTime() {\n\n  commitTime = now$1();\n}\n\nfunction startProfilerTimer(fiber) {\n\n  profilerStartTime = now$1();\n\n  if (fiber.actualStartTime < 0) {\n    fiber.actualStartTime = now$1();\n  }\n}\n\nfunction stopProfilerTimerIfRunning(fiber) {\n\n  profilerStartTime = -1;\n}\n\nfunction stopProfilerTimerIfRunningAndRecordDelta(fiber, overrideBaseTime) {\n\n  if (profilerStartTime >= 0) {\n    var elapsedTime = now$1() - profilerStartTime;\n    fiber.actualDuration += elapsedTime;\n\n    if (overrideBaseTime) {\n      fiber.selfBaseDuration = elapsedTime;\n    }\n\n    profilerStartTime = -1;\n  }\n}\n\nfunction transferActualDuration(fiber) {\n  // Transfer time spent rendering these children so we don't lose it\n  // after we rerender. This is used as a helper in special cases\n  // where we should count the work of multiple passes.\n  var child = fiber.child;\n\n  while (child) {\n    fiber.actualDuration += child.actualDuration;\n    child = child.sibling;\n  }\n}\n\nvar ReactCurrentOwner$1 = ReactSharedInternals.ReactCurrentOwner;\nvar didReceiveUpdate = false;\nvar didWarnAboutBadClass;\nvar didWarnAboutModulePatternComponent;\nvar didWarnAboutContextTypeOnFunctionComponent;\nvar didWarnAboutGetDerivedStateOnFunctionComponent;\nvar didWarnAboutFunctionRefs;\nvar didWarnAboutReassigningProps;\nvar didWarnAboutRevealOrder;\nvar didWarnAboutTailOptions;\n\n{\n  didWarnAboutBadClass = {};\n  didWarnAboutModulePatternComponent = {};\n  didWarnAboutContextTypeOnFunctionComponent = {};\n  didWarnAboutGetDerivedStateOnFunctionComponent = {};\n  didWarnAboutFunctionRefs = {};\n  didWarnAboutReassigningProps = false;\n  didWarnAboutRevealOrder = {};\n  didWarnAboutTailOptions = {};\n}\n\nfunction reconcileChildren(current, workInProgress, nextChildren, renderLanes) {\n  if (current === null) {\n    // If this is a fresh new component that hasn't been rendered yet, we\n    // won't update its child set by applying minimal side-effects. Instead,\n    // we will add them all to the child before it gets rendered. That means\n    // we can optimize this reconciliation pass by not tracking side-effects.\n    workInProgress.child = mountChildFibers(workInProgress, null, nextChildren, renderLanes);\n  } else {\n    // If the current child is the same as the work in progress, it means that\n    // we haven't yet started any work on these children. Therefore, we use\n    // the clone algorithm to create a copy of all the current children.\n    // If we had any progressed work already, that is invalid at this point so\n    // let's throw it out.\n    workInProgress.child = reconcileChildFibers(workInProgress, current.child, nextChildren, renderLanes);\n  }\n}\n\nfunction forceUnmountCurrentAndReconcile(current, workInProgress, nextChildren, renderLanes) {\n  // This function is fork of reconcileChildren. It's used in cases where we\n  // want to reconcile without matching against the existing set. This has the\n  // effect of all current children being unmounted; even if the type and key\n  // are the same, the old child is unmounted and a new child is created.\n  //\n  // To do this, we're going to go through the reconcile algorithm twice. In\n  // the first pass, we schedule a deletion for all the current children by\n  // passing null.\n  workInProgress.child = reconcileChildFibers(workInProgress, current.child, null, renderLanes); // In the second pass, we mount the new children. The trick here is that we\n  // pass null in place of where we usually pass the current child set. This has\n  // the effect of remounting all children regardless of whether their\n  // identities match.\n\n  workInProgress.child = reconcileChildFibers(workInProgress, null, nextChildren, renderLanes);\n}\n\nfunction updateForwardRef(current, workInProgress, Component, nextProps, renderLanes) {\n  // TODO: current can be non-null here even if the component\n  // hasn't yet mounted. This happens after the first render suspends.\n  // We'll need to figure out if this is fine or can cause issues.\n  {\n    if (workInProgress.type !== workInProgress.elementType) {\n      // Lazy component props can't be validated in createElement\n      // because they're only guaranteed to be resolved here.\n      var innerPropTypes = Component.propTypes;\n\n      if (innerPropTypes) {\n        checkPropTypes(innerPropTypes, nextProps, // Resolved props\n        'prop', getComponentName(Component));\n      }\n    }\n  }\n\n  var render = Component.render;\n  var ref = workInProgress.ref; // The rest is a fork of updateFunctionComponent\n\n  var nextChildren;\n  prepareToReadContext(workInProgress, renderLanes);\n\n  {\n    ReactCurrentOwner$1.current = workInProgress;\n    setIsRendering(true);\n    nextChildren = renderWithHooks(current, workInProgress, render, nextProps, ref, renderLanes);\n\n    if ( workInProgress.mode & StrictMode) {\n      disableLogs();\n\n      try {\n        nextChildren = renderWithHooks(current, workInProgress, render, nextProps, ref, renderLanes);\n      } finally {\n        reenableLogs();\n      }\n    }\n\n    setIsRendering(false);\n  }\n\n  if (current !== null && !didReceiveUpdate) {\n    bailoutHooks(current, workInProgress, renderLanes);\n    return bailoutOnAlreadyFinishedWork(current, workInProgress, renderLanes);\n  } // React DevTools reads this flag.\n\n\n  workInProgress.flags |= PerformedWork;\n  reconcileChildren(current, workInProgress, nextChildren, renderLanes);\n  return workInProgress.child;\n}\n\nfunction updateMemoComponent(current, workInProgress, Component, nextProps, updateLanes, renderLanes) {\n  if (current === null) {\n    var type = Component.type;\n\n    if (isSimpleFunctionComponent(type) && Component.compare === null && // SimpleMemoComponent codepath doesn't resolve outer props either.\n    Component.defaultProps === undefined) {\n      var resolvedType = type;\n\n      {\n        resolvedType = resolveFunctionForHotReloading(type);\n      } // If this is a plain function component without default props,\n      // and with only the default shallow comparison, we upgrade it\n      // to a SimpleMemoComponent to allow fast path updates.\n\n\n      workInProgress.tag = SimpleMemoComponent;\n      workInProgress.type = resolvedType;\n\n      {\n        validateFunctionComponentInDev(workInProgress, type);\n      }\n\n      return updateSimpleMemoComponent(current, workInProgress, resolvedType, nextProps, updateLanes, renderLanes);\n    }\n\n    {\n      var innerPropTypes = type.propTypes;\n\n      if (innerPropTypes) {\n        // Inner memo component props aren't currently validated in createElement.\n        // We could move it there, but we'd still need this for lazy code path.\n        checkPropTypes(innerPropTypes, nextProps, // Resolved props\n        'prop', getComponentName(type));\n      }\n    }\n\n    var child = createFiberFromTypeAndProps(Component.type, null, nextProps, workInProgress, workInProgress.mode, renderLanes);\n    child.ref = workInProgress.ref;\n    child.return = workInProgress;\n    workInProgress.child = child;\n    return child;\n  }\n\n  {\n    var _type = Component.type;\n    var _innerPropTypes = _type.propTypes;\n\n    if (_innerPropTypes) {\n      // Inner memo component props aren't currently validated in createElement.\n      // We could move it there, but we'd still need this for lazy code path.\n      checkPropTypes(_innerPropTypes, nextProps, // Resolved props\n      'prop', getComponentName(_type));\n    }\n  }\n\n  var currentChild = current.child; // This is always exactly one child\n\n  if (!includesSomeLane(updateLanes, renderLanes)) {\n    // This will be the props with resolved defaultProps,\n    // unlike current.memoizedProps which will be the unresolved ones.\n    var prevProps = currentChild.memoizedProps; // Default to shallow comparison\n\n    var compare = Component.compare;\n    compare = compare !== null ? compare : shallowEqual;\n\n    if (compare(prevProps, nextProps) && current.ref === workInProgress.ref) {\n      return bailoutOnAlreadyFinishedWork(current, workInProgress, renderLanes);\n    }\n  } // React DevTools reads this flag.\n\n\n  workInProgress.flags |= PerformedWork;\n  var newChild = createWorkInProgress(currentChild, nextProps);\n  newChild.ref = workInProgress.ref;\n  newChild.return = workInProgress;\n  workInProgress.child = newChild;\n  return newChild;\n}\n\nfunction updateSimpleMemoComponent(current, workInProgress, Component, nextProps, updateLanes, renderLanes) {\n  // TODO: current can be non-null here even if the component\n  // hasn't yet mounted. This happens when the inner render suspends.\n  // We'll need to figure out if this is fine or can cause issues.\n  {\n    if (workInProgress.type !== workInProgress.elementType) {\n      // Lazy component props can't be validated in createElement\n      // because they're only guaranteed to be resolved here.\n      var outerMemoType = workInProgress.elementType;\n\n      if (outerMemoType.$$typeof === REACT_LAZY_TYPE) {\n        // We warn when you define propTypes on lazy()\n        // so let's just skip over it to find memo() outer wrapper.\n        // Inner props for memo are validated later.\n        var lazyComponent = outerMemoType;\n        var payload = lazyComponent._payload;\n        var init = lazyComponent._init;\n\n        try {\n          outerMemoType = init(payload);\n        } catch (x) {\n          outerMemoType = null;\n        } // Inner propTypes will be validated in the function component path.\n\n\n        var outerPropTypes = outerMemoType && outerMemoType.propTypes;\n\n        if (outerPropTypes) {\n          checkPropTypes(outerPropTypes, nextProps, // Resolved (SimpleMemoComponent has no defaultProps)\n          'prop', getComponentName(outerMemoType));\n        }\n      }\n    }\n  }\n\n  if (current !== null) {\n    var prevProps = current.memoizedProps;\n\n    if (shallowEqual(prevProps, nextProps) && current.ref === workInProgress.ref && ( // Prevent bailout if the implementation changed due to hot reload.\n     workInProgress.type === current.type )) {\n      didReceiveUpdate = false;\n\n      if (!includesSomeLane(renderLanes, updateLanes)) {\n        // The pending lanes were cleared at the beginning of beginWork. We're\n        // about to bail out, but there might be other lanes that weren't\n        // included in the current render. Usually, the priority level of the\n        // remaining updates is accumlated during the evaluation of the\n        // component (i.e. when processing the update queue). But since since\n        // we're bailing out early *without* evaluating the component, we need\n        // to account for it here, too. Reset to the value of the current fiber.\n        // NOTE: This only applies to SimpleMemoComponent, not MemoComponent,\n        // because a MemoComponent fiber does not have hooks or an update queue;\n        // rather, it wraps around an inner component, which may or may not\n        // contains hooks.\n        // TODO: Move the reset at in beginWork out of the common path so that\n        // this is no longer necessary.\n        workInProgress.lanes = current.lanes;\n        return bailoutOnAlreadyFinishedWork(current, workInProgress, renderLanes);\n      } else if ((current.flags & ForceUpdateForLegacySuspense) !== NoFlags) {\n        // This is a special case that only exists for legacy mode.\n        // See https://github.com/facebook/react/pull/19216.\n        didReceiveUpdate = true;\n      }\n    }\n  }\n\n  return updateFunctionComponent(current, workInProgress, Component, nextProps, renderLanes);\n}\n\nfunction updateOffscreenComponent(current, workInProgress, renderLanes) {\n  var nextProps = workInProgress.pendingProps;\n  var nextChildren = nextProps.children;\n  var prevState = current !== null ? current.memoizedState : null;\n\n  if (nextProps.mode === 'hidden' || nextProps.mode === 'unstable-defer-without-hiding') {\n    if ((workInProgress.mode & ConcurrentMode) === NoMode) {\n      // In legacy sync mode, don't defer the subtree. Render it now.\n      // TODO: Figure out what we should do in Blocking mode.\n      var nextState = {\n        baseLanes: NoLanes\n      };\n      workInProgress.memoizedState = nextState;\n      pushRenderLanes(workInProgress, renderLanes);\n    } else if (!includesSomeLane(renderLanes, OffscreenLane)) {\n      var nextBaseLanes;\n\n      if (prevState !== null) {\n        var prevBaseLanes = prevState.baseLanes;\n        nextBaseLanes = mergeLanes(prevBaseLanes, renderLanes);\n      } else {\n        nextBaseLanes = renderLanes;\n      } // Schedule this fiber to re-render at offscreen priority. Then bailout.\n\n\n      {\n        markSpawnedWork(OffscreenLane);\n      }\n\n      workInProgress.lanes = workInProgress.childLanes = laneToLanes(OffscreenLane);\n      var _nextState = {\n        baseLanes: nextBaseLanes\n      };\n      workInProgress.memoizedState = _nextState; // We're about to bail out, but we need to push this to the stack anyway\n      // to avoid a push/pop misalignment.\n\n      pushRenderLanes(workInProgress, nextBaseLanes);\n      return null;\n    } else {\n      // Rendering at offscreen, so we can clear the base lanes.\n      var _nextState2 = {\n        baseLanes: NoLanes\n      };\n      workInProgress.memoizedState = _nextState2; // Push the lanes that were skipped when we bailed out.\n\n      var subtreeRenderLanes = prevState !== null ? prevState.baseLanes : renderLanes;\n      pushRenderLanes(workInProgress, subtreeRenderLanes);\n    }\n  } else {\n    var _subtreeRenderLanes;\n\n    if (prevState !== null) {\n      _subtreeRenderLanes = mergeLanes(prevState.baseLanes, renderLanes); // Since we're not hidden anymore, reset the state\n\n      workInProgress.memoizedState = null;\n    } else {\n      // We weren't previously hidden, and we still aren't, so there's nothing\n      // special to do. Need to push to the stack regardless, though, to avoid\n      // a push/pop misalignment.\n      _subtreeRenderLanes = renderLanes;\n    }\n\n    pushRenderLanes(workInProgress, _subtreeRenderLanes);\n  }\n\n  reconcileChildren(current, workInProgress, nextChildren, renderLanes);\n  return workInProgress.child;\n} // Note: These happen to have identical begin phases, for now. We shouldn't hold\n// ourselves to this constraint, though. If the behavior diverges, we should\n// fork the function.\n\n\nvar updateLegacyHiddenComponent = updateOffscreenComponent;\n\nfunction updateFragment(current, workInProgress, renderLanes) {\n  var nextChildren = workInProgress.pendingProps;\n  reconcileChildren(current, workInProgress, nextChildren, renderLanes);\n  return workInProgress.child;\n}\n\nfunction updateMode(current, workInProgress, renderLanes) {\n  var nextChildren = workInProgress.pendingProps.children;\n  reconcileChildren(current, workInProgress, nextChildren, renderLanes);\n  return workInProgress.child;\n}\n\nfunction updateProfiler(current, workInProgress, renderLanes) {\n  {\n    workInProgress.flags |= Update; // Reset effect durations for the next eventual effect phase.\n    // These are reset during render to allow the DevTools commit hook a chance to read them,\n\n    var stateNode = workInProgress.stateNode;\n    stateNode.effectDuration = 0;\n    stateNode.passiveEffectDuration = 0;\n  }\n\n  var nextProps = workInProgress.pendingProps;\n  var nextChildren = nextProps.children;\n  reconcileChildren(current, workInProgress, nextChildren, renderLanes);\n  return workInProgress.child;\n}\n\nfunction markRef(current, workInProgress) {\n  var ref = workInProgress.ref;\n\n  if (current === null && ref !== null || current !== null && current.ref !== ref) {\n    // Schedule a Ref effect\n    workInProgress.flags |= Ref;\n  }\n}\n\nfunction updateFunctionComponent(current, workInProgress, Component, nextProps, renderLanes) {\n  {\n    if (workInProgress.type !== workInProgress.elementType) {\n      // Lazy component props can't be validated in createElement\n      // because they're only guaranteed to be resolved here.\n      var innerPropTypes = Component.propTypes;\n\n      if (innerPropTypes) {\n        checkPropTypes(innerPropTypes, nextProps, // Resolved props\n        'prop', getComponentName(Component));\n      }\n    }\n  }\n\n  var context;\n\n  {\n    var unmaskedContext = getUnmaskedContext(workInProgress, Component, true);\n    context = getMaskedContext(workInProgress, unmaskedContext);\n  }\n\n  var nextChildren;\n  prepareToReadContext(workInProgress, renderLanes);\n\n  {\n    ReactCurrentOwner$1.current = workInProgress;\n    setIsRendering(true);\n    nextChildren = renderWithHooks(current, workInProgress, Component, nextProps, context, renderLanes);\n\n    if ( workInProgress.mode & StrictMode) {\n      disableLogs();\n\n      try {\n        nextChildren = renderWithHooks(current, workInProgress, Component, nextProps, context, renderLanes);\n      } finally {\n        reenableLogs();\n      }\n    }\n\n    setIsRendering(false);\n  }\n\n  if (current !== null && !didReceiveUpdate) {\n    bailoutHooks(current, workInProgress, renderLanes);\n    return bailoutOnAlreadyFinishedWork(current, workInProgress, renderLanes);\n  } // React DevTools reads this flag.\n\n\n  workInProgress.flags |= PerformedWork;\n  reconcileChildren(current, workInProgress, nextChildren, renderLanes);\n  return workInProgress.child;\n}\n\nfunction updateClassComponent(current, workInProgress, Component, nextProps, renderLanes) {\n  {\n    if (workInProgress.type !== workInProgress.elementType) {\n      // Lazy component props can't be validated in createElement\n      // because they're only guaranteed to be resolved here.\n      var innerPropTypes = Component.propTypes;\n\n      if (innerPropTypes) {\n        checkPropTypes(innerPropTypes, nextProps, // Resolved props\n        'prop', getComponentName(Component));\n      }\n    }\n  } // Push context providers early to prevent context stack mismatches.\n  // During mounting we don't know the child context yet as the instance doesn't exist.\n  // We will invalidate the child context in finishClassComponent() right after rendering.\n\n\n  var hasContext;\n\n  if (isContextProvider(Component)) {\n    hasContext = true;\n    pushContextProvider(workInProgress);\n  } else {\n    hasContext = false;\n  }\n\n  prepareToReadContext(workInProgress, renderLanes);\n  var instance = workInProgress.stateNode;\n  var shouldUpdate;\n\n  if (instance === null) {\n    if (current !== null) {\n      // A class component without an instance only mounts if it suspended\n      // inside a non-concurrent tree, in an inconsistent state. We want to\n      // treat it like a new mount, even though an empty version of it already\n      // committed. Disconnect the alternate pointers.\n      current.alternate = null;\n      workInProgress.alternate = null; // Since this is conceptually a new fiber, schedule a Placement effect\n\n      workInProgress.flags |= Placement;\n    } // In the initial pass we might need to construct the instance.\n\n\n    constructClassInstance(workInProgress, Component, nextProps);\n    mountClassInstance(workInProgress, Component, nextProps, renderLanes);\n    shouldUpdate = true;\n  } else if (current === null) {\n    // In a resume, we'll already have an instance we can reuse.\n    shouldUpdate = resumeMountClassInstance(workInProgress, Component, nextProps, renderLanes);\n  } else {\n    shouldUpdate = updateClassInstance(current, workInProgress, Component, nextProps, renderLanes);\n  }\n\n  var nextUnitOfWork = finishClassComponent(current, workInProgress, Component, shouldUpdate, hasContext, renderLanes);\n\n  {\n    var inst = workInProgress.stateNode;\n\n    if (shouldUpdate && inst.props !== nextProps) {\n      if (!didWarnAboutReassigningProps) {\n        error('It looks like %s is reassigning its own `this.props` while rendering. ' + 'This is not supported and can lead to confusing bugs.', getComponentName(workInProgress.type) || 'a component');\n      }\n\n      didWarnAboutReassigningProps = true;\n    }\n  }\n\n  return nextUnitOfWork;\n}\n\nfunction finishClassComponent(current, workInProgress, Component, shouldUpdate, hasContext, renderLanes) {\n  // Refs should update even if shouldComponentUpdate returns false\n  markRef(current, workInProgress);\n  var didCaptureError = (workInProgress.flags & DidCapture) !== NoFlags;\n\n  if (!shouldUpdate && !didCaptureError) {\n    // Context providers should defer to sCU for rendering\n    if (hasContext) {\n      invalidateContextProvider(workInProgress, Component, false);\n    }\n\n    return bailoutOnAlreadyFinishedWork(current, workInProgress, renderLanes);\n  }\n\n  var instance = workInProgress.stateNode; // Rerender\n\n  ReactCurrentOwner$1.current = workInProgress;\n  var nextChildren;\n\n  if (didCaptureError && typeof Component.getDerivedStateFromError !== 'function') {\n    // If we captured an error, but getDerivedStateFromError is not defined,\n    // unmount all the children. componentDidCatch will schedule an update to\n    // re-render a fallback. This is temporary until we migrate everyone to\n    // the new API.\n    // TODO: Warn in a future release.\n    nextChildren = null;\n\n    {\n      stopProfilerTimerIfRunning();\n    }\n  } else {\n    {\n      setIsRendering(true);\n      nextChildren = instance.render();\n\n      if ( workInProgress.mode & StrictMode) {\n        disableLogs();\n\n        try {\n          instance.render();\n        } finally {\n          reenableLogs();\n        }\n      }\n\n      setIsRendering(false);\n    }\n  } // React DevTools reads this flag.\n\n\n  workInProgress.flags |= PerformedWork;\n\n  if (current !== null && didCaptureError) {\n    // If we're recovering from an error, reconcile without reusing any of\n    // the existing children. Conceptually, the normal children and the children\n    // that are shown on error are two different sets, so we shouldn't reuse\n    // normal children even if their identities match.\n    forceUnmountCurrentAndReconcile(current, workInProgress, nextChildren, renderLanes);\n  } else {\n    reconcileChildren(current, workInProgress, nextChildren, renderLanes);\n  } // Memoize state using the values we just used to render.\n  // TODO: Restructure so we never read values from the instance.\n\n\n  workInProgress.memoizedState = instance.state; // The context might have changed so we need to recalculate it.\n\n  if (hasContext) {\n    invalidateContextProvider(workInProgress, Component, true);\n  }\n\n  return workInProgress.child;\n}\n\nfunction pushHostRootContext(workInProgress) {\n  var root = workInProgress.stateNode;\n\n  if (root.pendingContext) {\n    pushTopLevelContextObject(workInProgress, root.pendingContext, root.pendingContext !== root.context);\n  } else if (root.context) {\n    // Should always be set\n    pushTopLevelContextObject(workInProgress, root.context, false);\n  }\n\n  pushHostContainer(workInProgress, root.containerInfo);\n}\n\nfunction updateHostRoot(current, workInProgress, renderLanes) {\n  pushHostRootContext(workInProgress);\n  var updateQueue = workInProgress.updateQueue;\n\n  if (!(current !== null && updateQueue !== null)) {\n    {\n      throw Error( \"If the root does not have an updateQueue, we should have already bailed out. This error is likely caused by a bug in React. Please file an issue.\" );\n    }\n  }\n\n  var nextProps = workInProgress.pendingProps;\n  var prevState = workInProgress.memoizedState;\n  var prevChildren = prevState !== null ? prevState.element : null;\n  cloneUpdateQueue(current, workInProgress);\n  processUpdateQueue(workInProgress, nextProps, null, renderLanes);\n  var nextState = workInProgress.memoizedState; // Caution: React DevTools currently depends on this property\n  // being called \"element\".\n\n  var nextChildren = nextState.element;\n\n  if (nextChildren === prevChildren) {\n    resetHydrationState();\n    return bailoutOnAlreadyFinishedWork(current, workInProgress, renderLanes);\n  }\n\n  var root = workInProgress.stateNode;\n\n  if (root.hydrate && enterHydrationState(workInProgress)) {\n    // If we don't have any current children this might be the first pass.\n    // We always try to hydrate. If this isn't a hydration pass there won't\n    // be any children to hydrate which is effectively the same thing as\n    // not hydrating.\n    {\n      var mutableSourceEagerHydrationData = root.mutableSourceEagerHydrationData;\n\n      if (mutableSourceEagerHydrationData != null) {\n        for (var i = 0; i < mutableSourceEagerHydrationData.length; i += 2) {\n          var mutableSource = mutableSourceEagerHydrationData[i];\n          var version = mutableSourceEagerHydrationData[i + 1];\n          setWorkInProgressVersion(mutableSource, version);\n        }\n      }\n    }\n\n    var child = mountChildFibers(workInProgress, null, nextChildren, renderLanes);\n    workInProgress.child = child;\n    var node = child;\n\n    while (node) {\n      // Mark each child as hydrating. This is a fast path to know whether this\n      // tree is part of a hydrating tree. This is used to determine if a child\n      // node has fully mounted yet, and for scheduling event replaying.\n      // Conceptually this is similar to Placement in that a new subtree is\n      // inserted into the React tree here. It just happens to not need DOM\n      // mutations because it already exists.\n      node.flags = node.flags & ~Placement | Hydrating;\n      node = node.sibling;\n    }\n  } else {\n    // Otherwise reset hydration state in case we aborted and resumed another\n    // root.\n    reconcileChildren(current, workInProgress, nextChildren, renderLanes);\n    resetHydrationState();\n  }\n\n  return workInProgress.child;\n}\n\nfunction updateHostComponent(current, workInProgress, renderLanes) {\n  pushHostContext(workInProgress);\n\n  if (current === null) {\n    tryToClaimNextHydratableInstance(workInProgress);\n  }\n\n  var type = workInProgress.type;\n  var nextProps = workInProgress.pendingProps;\n  var prevProps = current !== null ? current.memoizedProps : null;\n  var nextChildren = nextProps.children;\n  var isDirectTextChild = shouldSetTextContent(type, nextProps);\n\n  if (isDirectTextChild) {\n    // We special case a direct text child of a host node. This is a common\n    // case. We won't handle it as a reified child. We will instead handle\n    // this in the host environment that also has access to this prop. That\n    // avoids allocating another HostText fiber and traversing it.\n    nextChildren = null;\n  } else if (prevProps !== null && shouldSetTextContent(type, prevProps)) {\n    // If we're switching from a direct text child to a normal child, or to\n    // empty, we need to schedule the text content to be reset.\n    workInProgress.flags |= ContentReset;\n  }\n\n  markRef(current, workInProgress);\n  reconcileChildren(current, workInProgress, nextChildren, renderLanes);\n  return workInProgress.child;\n}\n\nfunction updateHostText(current, workInProgress) {\n  if (current === null) {\n    tryToClaimNextHydratableInstance(workInProgress);\n  } // Nothing to do here. This is terminal. We'll do the completion step\n  // immediately after.\n\n\n  return null;\n}\n\nfunction mountLazyComponent(_current, workInProgress, elementType, updateLanes, renderLanes) {\n  if (_current !== null) {\n    // A lazy component only mounts if it suspended inside a non-\n    // concurrent tree, in an inconsistent state. We want to treat it like\n    // a new mount, even though an empty version of it already committed.\n    // Disconnect the alternate pointers.\n    _current.alternate = null;\n    workInProgress.alternate = null; // Since this is conceptually a new fiber, schedule a Placement effect\n\n    workInProgress.flags |= Placement;\n  }\n\n  var props = workInProgress.pendingProps;\n  var lazyComponent = elementType;\n  var payload = lazyComponent._payload;\n  var init = lazyComponent._init;\n  var Component = init(payload); // Store the unwrapped component in the type.\n\n  workInProgress.type = Component;\n  var resolvedTag = workInProgress.tag = resolveLazyComponentTag(Component);\n  var resolvedProps = resolveDefaultProps(Component, props);\n  var child;\n\n  switch (resolvedTag) {\n    case FunctionComponent:\n      {\n        {\n          validateFunctionComponentInDev(workInProgress, Component);\n          workInProgress.type = Component = resolveFunctionForHotReloading(Component);\n        }\n\n        child = updateFunctionComponent(null, workInProgress, Component, resolvedProps, renderLanes);\n        return child;\n      }\n\n    case ClassComponent:\n      {\n        {\n          workInProgress.type = Component = resolveClassForHotReloading(Component);\n        }\n\n        child = updateClassComponent(null, workInProgress, Component, resolvedProps, renderLanes);\n        return child;\n      }\n\n    case ForwardRef:\n      {\n        {\n          workInProgress.type = Component = resolveForwardRefForHotReloading(Component);\n        }\n\n        child = updateForwardRef(null, workInProgress, Component, resolvedProps, renderLanes);\n        return child;\n      }\n\n    case MemoComponent:\n      {\n        {\n          if (workInProgress.type !== workInProgress.elementType) {\n            var outerPropTypes = Component.propTypes;\n\n            if (outerPropTypes) {\n              checkPropTypes(outerPropTypes, resolvedProps, // Resolved for outer only\n              'prop', getComponentName(Component));\n            }\n          }\n        }\n\n        child = updateMemoComponent(null, workInProgress, Component, resolveDefaultProps(Component.type, resolvedProps), // The inner type can have defaults too\n        updateLanes, renderLanes);\n        return child;\n      }\n  }\n\n  var hint = '';\n\n  {\n    if (Component !== null && typeof Component === 'object' && Component.$$typeof === REACT_LAZY_TYPE) {\n      hint = ' Did you wrap a component in React.lazy() more than once?';\n    }\n  } // This message intentionally doesn't mention ForwardRef or MemoComponent\n  // because the fact that it's a separate type of work is an\n  // implementation detail.\n\n\n  {\n    {\n      throw Error( \"Element type is invalid. Received a promise that resolves to: \" + Component + \". Lazy element type must resolve to a class or function.\" + hint );\n    }\n  }\n}\n\nfunction mountIncompleteClassComponent(_current, workInProgress, Component, nextProps, renderLanes) {\n  if (_current !== null) {\n    // An incomplete component only mounts if it suspended inside a non-\n    // concurrent tree, in an inconsistent state. We want to treat it like\n    // a new mount, even though an empty version of it already committed.\n    // Disconnect the alternate pointers.\n    _current.alternate = null;\n    workInProgress.alternate = null; // Since this is conceptually a new fiber, schedule a Placement effect\n\n    workInProgress.flags |= Placement;\n  } // Promote the fiber to a class and try rendering again.\n\n\n  workInProgress.tag = ClassComponent; // The rest of this function is a fork of `updateClassComponent`\n  // Push context providers early to prevent context stack mismatches.\n  // During mounting we don't know the child context yet as the instance doesn't exist.\n  // We will invalidate the child context in finishClassComponent() right after rendering.\n\n  var hasContext;\n\n  if (isContextProvider(Component)) {\n    hasContext = true;\n    pushContextProvider(workInProgress);\n  } else {\n    hasContext = false;\n  }\n\n  prepareToReadContext(workInProgress, renderLanes);\n  constructClassInstance(workInProgress, Component, nextProps);\n  mountClassInstance(workInProgress, Component, nextProps, renderLanes);\n  return finishClassComponent(null, workInProgress, Component, true, hasContext, renderLanes);\n}\n\nfunction mountIndeterminateComponent(_current, workInProgress, Component, renderLanes) {\n  if (_current !== null) {\n    // An indeterminate component only mounts if it suspended inside a non-\n    // concurrent tree, in an inconsistent state. We want to treat it like\n    // a new mount, even though an empty version of it already committed.\n    // Disconnect the alternate pointers.\n    _current.alternate = null;\n    workInProgress.alternate = null; // Since this is conceptually a new fiber, schedule a Placement effect\n\n    workInProgress.flags |= Placement;\n  }\n\n  var props = workInProgress.pendingProps;\n  var context;\n\n  {\n    var unmaskedContext = getUnmaskedContext(workInProgress, Component, false);\n    context = getMaskedContext(workInProgress, unmaskedContext);\n  }\n\n  prepareToReadContext(workInProgress, renderLanes);\n  var value;\n\n  {\n    if (Component.prototype && typeof Component.prototype.render === 'function') {\n      var componentName = getComponentName(Component) || 'Unknown';\n\n      if (!didWarnAboutBadClass[componentName]) {\n        error(\"The <%s /> component appears to have a render method, but doesn't extend React.Component. \" + 'This is likely to cause errors. Change %s to extend React.Component instead.', componentName, componentName);\n\n        didWarnAboutBadClass[componentName] = true;\n      }\n    }\n\n    if (workInProgress.mode & StrictMode) {\n      ReactStrictModeWarnings.recordLegacyContextWarning(workInProgress, null);\n    }\n\n    setIsRendering(true);\n    ReactCurrentOwner$1.current = workInProgress;\n    value = renderWithHooks(null, workInProgress, Component, props, context, renderLanes);\n    setIsRendering(false);\n  } // React DevTools reads this flag.\n\n\n  workInProgress.flags |= PerformedWork;\n\n  {\n    // Support for module components is deprecated and is removed behind a flag.\n    // Whether or not it would crash later, we want to show a good message in DEV first.\n    if (typeof value === 'object' && value !== null && typeof value.render === 'function' && value.$$typeof === undefined) {\n      var _componentName = getComponentName(Component) || 'Unknown';\n\n      if (!didWarnAboutModulePatternComponent[_componentName]) {\n        error('The <%s /> component appears to be a function component that returns a class instance. ' + 'Change %s to a class that extends React.Component instead. ' + \"If you can't use a class try assigning the prototype on the function as a workaround. \" + \"`%s.prototype = React.Component.prototype`. Don't use an arrow function since it \" + 'cannot be called with `new` by React.', _componentName, _componentName, _componentName);\n\n        didWarnAboutModulePatternComponent[_componentName] = true;\n      }\n    }\n  }\n\n  if ( // Run these checks in production only if the flag is off.\n  // Eventually we'll delete this branch altogether.\n   typeof value === 'object' && value !== null && typeof value.render === 'function' && value.$$typeof === undefined) {\n    {\n      var _componentName2 = getComponentName(Component) || 'Unknown';\n\n      if (!didWarnAboutModulePatternComponent[_componentName2]) {\n        error('The <%s /> component appears to be a function component that returns a class instance. ' + 'Change %s to a class that extends React.Component instead. ' + \"If you can't use a class try assigning the prototype on the function as a workaround. \" + \"`%s.prototype = React.Component.prototype`. Don't use an arrow function since it \" + 'cannot be called with `new` by React.', _componentName2, _componentName2, _componentName2);\n\n        didWarnAboutModulePatternComponent[_componentName2] = true;\n      }\n    } // Proceed under the assumption that this is a class instance\n\n\n    workInProgress.tag = ClassComponent; // Throw out any hooks that were used.\n\n    workInProgress.memoizedState = null;\n    workInProgress.updateQueue = null; // Push context providers early to prevent context stack mismatches.\n    // During mounting we don't know the child context yet as the instance doesn't exist.\n    // We will invalidate the child context in finishClassComponent() right after rendering.\n\n    var hasContext = false;\n\n    if (isContextProvider(Component)) {\n      hasContext = true;\n      pushContextProvider(workInProgress);\n    } else {\n      hasContext = false;\n    }\n\n    workInProgress.memoizedState = value.state !== null && value.state !== undefined ? value.state : null;\n    initializeUpdateQueue(workInProgress);\n    var getDerivedStateFromProps = Component.getDerivedStateFromProps;\n\n    if (typeof getDerivedStateFromProps === 'function') {\n      applyDerivedStateFromProps(workInProgress, Component, getDerivedStateFromProps, props);\n    }\n\n    adoptClassInstance(workInProgress, value);\n    mountClassInstance(workInProgress, Component, props, renderLanes);\n    return finishClassComponent(null, workInProgress, Component, true, hasContext, renderLanes);\n  } else {\n    // Proceed under the assumption that this is a function component\n    workInProgress.tag = FunctionComponent;\n\n    {\n\n      if ( workInProgress.mode & StrictMode) {\n        disableLogs();\n\n        try {\n          value = renderWithHooks(null, workInProgress, Component, props, context, renderLanes);\n        } finally {\n          reenableLogs();\n        }\n      }\n    }\n\n    reconcileChildren(null, workInProgress, value, renderLanes);\n\n    {\n      validateFunctionComponentInDev(workInProgress, Component);\n    }\n\n    return workInProgress.child;\n  }\n}\n\nfunction validateFunctionComponentInDev(workInProgress, Component) {\n  {\n    if (Component) {\n      if (Component.childContextTypes) {\n        error('%s(...): childContextTypes cannot be defined on a function component.', Component.displayName || Component.name || 'Component');\n      }\n    }\n\n    if (workInProgress.ref !== null) {\n      var info = '';\n      var ownerName = getCurrentFiberOwnerNameInDevOrNull();\n\n      if (ownerName) {\n        info += '\\n\\nCheck the render method of `' + ownerName + '`.';\n      }\n\n      var warningKey = ownerName || workInProgress._debugID || '';\n      var debugSource = workInProgress._debugSource;\n\n      if (debugSource) {\n        warningKey = debugSource.fileName + ':' + debugSource.lineNumber;\n      }\n\n      if (!didWarnAboutFunctionRefs[warningKey]) {\n        didWarnAboutFunctionRefs[warningKey] = true;\n\n        error('Function components cannot be given refs. ' + 'Attempts to access this ref will fail. ' + 'Did you mean to use React.forwardRef()?%s', info);\n      }\n    }\n\n    if (typeof Component.getDerivedStateFromProps === 'function') {\n      var _componentName3 = getComponentName(Component) || 'Unknown';\n\n      if (!didWarnAboutGetDerivedStateOnFunctionComponent[_componentName3]) {\n        error('%s: Function components do not support getDerivedStateFromProps.', _componentName3);\n\n        didWarnAboutGetDerivedStateOnFunctionComponent[_componentName3] = true;\n      }\n    }\n\n    if (typeof Component.contextType === 'object' && Component.contextType !== null) {\n      var _componentName4 = getComponentName(Component) || 'Unknown';\n\n      if (!didWarnAboutContextTypeOnFunctionComponent[_componentName4]) {\n        error('%s: Function components do not support contextType.', _componentName4);\n\n        didWarnAboutContextTypeOnFunctionComponent[_componentName4] = true;\n      }\n    }\n  }\n}\n\nvar SUSPENDED_MARKER = {\n  dehydrated: null,\n  retryLane: NoLane\n};\n\nfunction mountSuspenseOffscreenState(renderLanes) {\n  return {\n    baseLanes: renderLanes\n  };\n}\n\nfunction updateSuspenseOffscreenState(prevOffscreenState, renderLanes) {\n  return {\n    baseLanes: mergeLanes(prevOffscreenState.baseLanes, renderLanes)\n  };\n} // TODO: Probably should inline this back\n\n\nfunction shouldRemainOnFallback(suspenseContext, current, workInProgress, renderLanes) {\n  // If we're already showing a fallback, there are cases where we need to\n  // remain on that fallback regardless of whether the content has resolved.\n  // For example, SuspenseList coordinates when nested content appears.\n  if (current !== null) {\n    var suspenseState = current.memoizedState;\n\n    if (suspenseState === null) {\n      // Currently showing content. Don't hide it, even if ForceSuspenseFallack\n      // is true. More precise name might be \"ForceRemainSuspenseFallback\".\n      // Note: This is a factoring smell. Can't remain on a fallback if there's\n      // no fallback to remain on.\n      return false;\n    }\n  } // Not currently showing content. Consult the Suspense context.\n\n\n  return hasSuspenseContext(suspenseContext, ForceSuspenseFallback);\n}\n\nfunction getRemainingWorkInPrimaryTree(current, renderLanes) {\n  // TODO: Should not remove render lanes that were pinged during this render\n  return removeLanes(current.childLanes, renderLanes);\n}\n\nfunction updateSuspenseComponent(current, workInProgress, renderLanes) {\n  var nextProps = workInProgress.pendingProps; // This is used by DevTools to force a boundary to suspend.\n\n  {\n    if (shouldSuspend(workInProgress)) {\n      workInProgress.flags |= DidCapture;\n    }\n  }\n\n  var suspenseContext = suspenseStackCursor.current;\n  var showFallback = false;\n  var didSuspend = (workInProgress.flags & DidCapture) !== NoFlags;\n\n  if (didSuspend || shouldRemainOnFallback(suspenseContext, current)) {\n    // Something in this boundary's subtree already suspended. Switch to\n    // rendering the fallback children.\n    showFallback = true;\n    workInProgress.flags &= ~DidCapture;\n  } else {\n    // Attempting the main content\n    if (current === null || current.memoizedState !== null) {\n      // This is a new mount or this boundary is already showing a fallback state.\n      // Mark this subtree context as having at least one invisible parent that could\n      // handle the fallback state.\n      // Boundaries without fallbacks or should be avoided are not considered since\n      // they cannot handle preferred fallback states.\n      if (nextProps.fallback !== undefined && nextProps.unstable_avoidThisFallback !== true) {\n        suspenseContext = addSubtreeSuspenseContext(suspenseContext, InvisibleParentSuspenseContext);\n      }\n    }\n  }\n\n  suspenseContext = setDefaultShallowSuspenseContext(suspenseContext);\n  pushSuspenseContext(workInProgress, suspenseContext); // OK, the next part is confusing. We're about to reconcile the Suspense\n  // boundary's children. This involves some custom reconcilation logic. Two\n  // main reasons this is so complicated.\n  //\n  // First, Legacy Mode has different semantics for backwards compatibility. The\n  // primary tree will commit in an inconsistent state, so when we do the\n  // second pass to render the fallback, we do some exceedingly, uh, clever\n  // hacks to make that not totally break. Like transferring effects and\n  // deletions from hidden tree. In Concurrent Mode, it's much simpler,\n  // because we bailout on the primary tree completely and leave it in its old\n  // state, no effects. Same as what we do for Offscreen (except that\n  // Offscreen doesn't have the first render pass).\n  //\n  // Second is hydration. During hydration, the Suspense fiber has a slightly\n  // different layout, where the child points to a dehydrated fragment, which\n  // contains the DOM rendered by the server.\n  //\n  // Third, even if you set all that aside, Suspense is like error boundaries in\n  // that we first we try to render one tree, and if that fails, we render again\n  // and switch to a different tree. Like a try/catch block. So we have to track\n  // which branch we're currently rendering. Ideally we would model this using\n  // a stack.\n\n  if (current === null) {\n    // Initial mount\n    // If we're currently hydrating, try to hydrate this boundary.\n    // But only if this has a fallback.\n    if (nextProps.fallback !== undefined) {\n      tryToClaimNextHydratableInstance(workInProgress); // This could've been a dehydrated suspense component.\n    }\n\n    var nextPrimaryChildren = nextProps.children;\n    var nextFallbackChildren = nextProps.fallback;\n\n    if (showFallback) {\n      var fallbackFragment = mountSuspenseFallbackChildren(workInProgress, nextPrimaryChildren, nextFallbackChildren, renderLanes);\n      var primaryChildFragment = workInProgress.child;\n      primaryChildFragment.memoizedState = mountSuspenseOffscreenState(renderLanes);\n      workInProgress.memoizedState = SUSPENDED_MARKER;\n      return fallbackFragment;\n    } else if (typeof nextProps.unstable_expectedLoadTime === 'number') {\n      // This is a CPU-bound tree. Skip this tree and show a placeholder to\n      // unblock the surrounding content. Then immediately retry after the\n      // initial commit.\n      var _fallbackFragment = mountSuspenseFallbackChildren(workInProgress, nextPrimaryChildren, nextFallbackChildren, renderLanes);\n\n      var _primaryChildFragment = workInProgress.child;\n      _primaryChildFragment.memoizedState = mountSuspenseOffscreenState(renderLanes);\n      workInProgress.memoizedState = SUSPENDED_MARKER; // Since nothing actually suspended, there will nothing to ping this to\n      // get it started back up to attempt the next item. While in terms of\n      // priority this work has the same priority as this current render, it's\n      // not part of the same transition once the transition has committed. If\n      // it's sync, we still want to yield so that it can be painted.\n      // Conceptually, this is really the same as pinging. We can use any\n      // RetryLane even if it's the one currently rendering since we're leaving\n      // it behind on this node.\n\n      workInProgress.lanes = SomeRetryLane;\n\n      {\n        markSpawnedWork(SomeRetryLane);\n      }\n\n      return _fallbackFragment;\n    } else {\n      return mountSuspensePrimaryChildren(workInProgress, nextPrimaryChildren, renderLanes);\n    }\n  } else {\n    // This is an update.\n    // If the current fiber has a SuspenseState, that means it's already showing\n    // a fallback.\n    var prevState = current.memoizedState;\n\n    if (prevState !== null) {\n\n      if (showFallback) {\n        var _nextFallbackChildren2 = nextProps.fallback;\n        var _nextPrimaryChildren2 = nextProps.children;\n\n        var _fallbackChildFragment = updateSuspenseFallbackChildren(current, workInProgress, _nextPrimaryChildren2, _nextFallbackChildren2, renderLanes);\n\n        var _primaryChildFragment3 = workInProgress.child;\n        var prevOffscreenState = current.child.memoizedState;\n        _primaryChildFragment3.memoizedState = prevOffscreenState === null ? mountSuspenseOffscreenState(renderLanes) : updateSuspenseOffscreenState(prevOffscreenState, renderLanes);\n        _primaryChildFragment3.childLanes = getRemainingWorkInPrimaryTree(current, renderLanes);\n        workInProgress.memoizedState = SUSPENDED_MARKER;\n        return _fallbackChildFragment;\n      } else {\n        var _nextPrimaryChildren3 = nextProps.children;\n\n        var _primaryChildFragment4 = updateSuspensePrimaryChildren(current, workInProgress, _nextPrimaryChildren3, renderLanes);\n\n        workInProgress.memoizedState = null;\n        return _primaryChildFragment4;\n      }\n    } else {\n      // The current tree is not already showing a fallback.\n      if (showFallback) {\n        // Timed out.\n        var _nextFallbackChildren3 = nextProps.fallback;\n        var _nextPrimaryChildren4 = nextProps.children;\n\n        var _fallbackChildFragment2 = updateSuspenseFallbackChildren(current, workInProgress, _nextPrimaryChildren4, _nextFallbackChildren3, renderLanes);\n\n        var _primaryChildFragment5 = workInProgress.child;\n        var _prevOffscreenState = current.child.memoizedState;\n        _primaryChildFragment5.memoizedState = _prevOffscreenState === null ? mountSuspenseOffscreenState(renderLanes) : updateSuspenseOffscreenState(_prevOffscreenState, renderLanes);\n        _primaryChildFragment5.childLanes = getRemainingWorkInPrimaryTree(current, renderLanes); // Skip the primary children, and continue working on the\n        // fallback children.\n\n        workInProgress.memoizedState = SUSPENDED_MARKER;\n        return _fallbackChildFragment2;\n      } else {\n        // Still haven't timed out. Continue rendering the children, like we\n        // normally do.\n        var _nextPrimaryChildren5 = nextProps.children;\n\n        var _primaryChildFragment6 = updateSuspensePrimaryChildren(current, workInProgress, _nextPrimaryChildren5, renderLanes);\n\n        workInProgress.memoizedState = null;\n        return _primaryChildFragment6;\n      }\n    }\n  }\n}\n\nfunction mountSuspensePrimaryChildren(workInProgress, primaryChildren, renderLanes) {\n  var mode = workInProgress.mode;\n  var primaryChildProps = {\n    mode: 'visible',\n    children: primaryChildren\n  };\n  var primaryChildFragment = createFiberFromOffscreen(primaryChildProps, mode, renderLanes, null);\n  primaryChildFragment.return = workInProgress;\n  workInProgress.child = primaryChildFragment;\n  return primaryChildFragment;\n}\n\nfunction mountSuspenseFallbackChildren(workInProgress, primaryChildren, fallbackChildren, renderLanes) {\n  var mode = workInProgress.mode;\n  var progressedPrimaryFragment = workInProgress.child;\n  var primaryChildProps = {\n    mode: 'hidden',\n    children: primaryChildren\n  };\n  var primaryChildFragment;\n  var fallbackChildFragment;\n\n  if ((mode & BlockingMode) === NoMode && progressedPrimaryFragment !== null) {\n    // In legacy mode, we commit the primary tree as if it successfully\n    // completed, even though it's in an inconsistent state.\n    primaryChildFragment = progressedPrimaryFragment;\n    primaryChildFragment.childLanes = NoLanes;\n    primaryChildFragment.pendingProps = primaryChildProps;\n\n    if ( workInProgress.mode & ProfileMode) {\n      // Reset the durations from the first pass so they aren't included in the\n      // final amounts. This seems counterintuitive, since we're intentionally\n      // not measuring part of the render phase, but this makes it match what we\n      // do in Concurrent Mode.\n      primaryChildFragment.actualDuration = 0;\n      primaryChildFragment.actualStartTime = -1;\n      primaryChildFragment.selfBaseDuration = 0;\n      primaryChildFragment.treeBaseDuration = 0;\n    }\n\n    fallbackChildFragment = createFiberFromFragment(fallbackChildren, mode, renderLanes, null);\n  } else {\n    primaryChildFragment = createFiberFromOffscreen(primaryChildProps, mode, NoLanes, null);\n    fallbackChildFragment = createFiberFromFragment(fallbackChildren, mode, renderLanes, null);\n  }\n\n  primaryChildFragment.return = workInProgress;\n  fallbackChildFragment.return = workInProgress;\n  primaryChildFragment.sibling = fallbackChildFragment;\n  workInProgress.child = primaryChildFragment;\n  return fallbackChildFragment;\n}\n\nfunction createWorkInProgressOffscreenFiber(current, offscreenProps) {\n  // The props argument to `createWorkInProgress` is `any` typed, so we use this\n  // wrapper function to constrain it.\n  return createWorkInProgress(current, offscreenProps);\n}\n\nfunction updateSuspensePrimaryChildren(current, workInProgress, primaryChildren, renderLanes) {\n  var currentPrimaryChildFragment = current.child;\n  var currentFallbackChildFragment = currentPrimaryChildFragment.sibling;\n  var primaryChildFragment = createWorkInProgressOffscreenFiber(currentPrimaryChildFragment, {\n    mode: 'visible',\n    children: primaryChildren\n  });\n\n  if ((workInProgress.mode & BlockingMode) === NoMode) {\n    primaryChildFragment.lanes = renderLanes;\n  }\n\n  primaryChildFragment.return = workInProgress;\n  primaryChildFragment.sibling = null;\n\n  if (currentFallbackChildFragment !== null) {\n    // Delete the fallback child fragment\n    currentFallbackChildFragment.nextEffect = null;\n    currentFallbackChildFragment.flags = Deletion;\n    workInProgress.firstEffect = workInProgress.lastEffect = currentFallbackChildFragment;\n  }\n\n  workInProgress.child = primaryChildFragment;\n  return primaryChildFragment;\n}\n\nfunction updateSuspenseFallbackChildren(current, workInProgress, primaryChildren, fallbackChildren, renderLanes) {\n  var mode = workInProgress.mode;\n  var currentPrimaryChildFragment = current.child;\n  var currentFallbackChildFragment = currentPrimaryChildFragment.sibling;\n  var primaryChildProps = {\n    mode: 'hidden',\n    children: primaryChildren\n  };\n  var primaryChildFragment;\n\n  if ( // In legacy mode, we commit the primary tree as if it successfully\n  // completed, even though it's in an inconsistent state.\n  (mode & BlockingMode) === NoMode && // Make sure we're on the second pass, i.e. the primary child fragment was\n  // already cloned. In legacy mode, the only case where this isn't true is\n  // when DevTools forces us to display a fallback; we skip the first render\n  // pass entirely and go straight to rendering the fallback. (In Concurrent\n  // Mode, SuspenseList can also trigger this scenario, but this is a legacy-\n  // only codepath.)\n  workInProgress.child !== currentPrimaryChildFragment) {\n    var progressedPrimaryFragment = workInProgress.child;\n    primaryChildFragment = progressedPrimaryFragment;\n    primaryChildFragment.childLanes = NoLanes;\n    primaryChildFragment.pendingProps = primaryChildProps;\n\n    if ( workInProgress.mode & ProfileMode) {\n      // Reset the durations from the first pass so they aren't included in the\n      // final amounts. This seems counterintuitive, since we're intentionally\n      // not measuring part of the render phase, but this makes it match what we\n      // do in Concurrent Mode.\n      primaryChildFragment.actualDuration = 0;\n      primaryChildFragment.actualStartTime = -1;\n      primaryChildFragment.selfBaseDuration = currentPrimaryChildFragment.selfBaseDuration;\n      primaryChildFragment.treeBaseDuration = currentPrimaryChildFragment.treeBaseDuration;\n    } // The fallback fiber was added as a deletion effect during the first pass.\n    // However, since we're going to remain on the fallback, we no longer want\n    // to delete it. So we need to remove it from the list. Deletions are stored\n    // on the same list as effects. We want to keep the effects from the primary\n    // tree. So we copy the primary child fragment's effect list, which does not\n    // include the fallback deletion effect.\n\n\n    var progressedLastEffect = primaryChildFragment.lastEffect;\n\n    if (progressedLastEffect !== null) {\n      workInProgress.firstEffect = primaryChildFragment.firstEffect;\n      workInProgress.lastEffect = progressedLastEffect;\n      progressedLastEffect.nextEffect = null;\n    } else {\n      // TODO: Reset this somewhere else? Lol legacy mode is so weird.\n      workInProgress.firstEffect = workInProgress.lastEffect = null;\n    }\n  } else {\n    primaryChildFragment = createWorkInProgressOffscreenFiber(currentPrimaryChildFragment, primaryChildProps);\n  }\n\n  var fallbackChildFragment;\n\n  if (currentFallbackChildFragment !== null) {\n    fallbackChildFragment = createWorkInProgress(currentFallbackChildFragment, fallbackChildren);\n  } else {\n    fallbackChildFragment = createFiberFromFragment(fallbackChildren, mode, renderLanes, null); // Needs a placement effect because the parent (the Suspense boundary) already\n    // mounted but this is a new fiber.\n\n    fallbackChildFragment.flags |= Placement;\n  }\n\n  fallbackChildFragment.return = workInProgress;\n  primaryChildFragment.return = workInProgress;\n  primaryChildFragment.sibling = fallbackChildFragment;\n  workInProgress.child = primaryChildFragment;\n  return fallbackChildFragment;\n}\n\nfunction scheduleWorkOnFiber(fiber, renderLanes) {\n  fiber.lanes = mergeLanes(fiber.lanes, renderLanes);\n  var alternate = fiber.alternate;\n\n  if (alternate !== null) {\n    alternate.lanes = mergeLanes(alternate.lanes, renderLanes);\n  }\n\n  scheduleWorkOnParentPath(fiber.return, renderLanes);\n}\n\nfunction propagateSuspenseContextChange(workInProgress, firstChild, renderLanes) {\n  // Mark any Suspense boundaries with fallbacks as having work to do.\n  // If they were previously forced into fallbacks, they may now be able\n  // to unblock.\n  var node = firstChild;\n\n  while (node !== null) {\n    if (node.tag === SuspenseComponent) {\n      var state = node.memoizedState;\n\n      if (state !== null) {\n        scheduleWorkOnFiber(node, renderLanes);\n      }\n    } else if (node.tag === SuspenseListComponent) {\n      // If the tail is hidden there might not be an Suspense boundaries\n      // to schedule work on. In this case we have to schedule it on the\n      // list itself.\n      // We don't have to traverse to the children of the list since\n      // the list will propagate the change when it rerenders.\n      scheduleWorkOnFiber(node, renderLanes);\n    } else if (node.child !== null) {\n      node.child.return = node;\n      node = node.child;\n      continue;\n    }\n\n    if (node === workInProgress) {\n      return;\n    }\n\n    while (node.sibling === null) {\n      if (node.return === null || node.return === workInProgress) {\n        return;\n      }\n\n      node = node.return;\n    }\n\n    node.sibling.return = node.return;\n    node = node.sibling;\n  }\n}\n\nfunction findLastContentRow(firstChild) {\n  // This is going to find the last row among these children that is already\n  // showing content on the screen, as opposed to being in fallback state or\n  // new. If a row has multiple Suspense boundaries, any of them being in the\n  // fallback state, counts as the whole row being in a fallback state.\n  // Note that the \"rows\" will be workInProgress, but any nested children\n  // will still be current since we haven't rendered them yet. The mounted\n  // order may not be the same as the new order. We use the new order.\n  var row = firstChild;\n  var lastContentRow = null;\n\n  while (row !== null) {\n    var currentRow = row.alternate; // New rows can't be content rows.\n\n    if (currentRow !== null && findFirstSuspended(currentRow) === null) {\n      lastContentRow = row;\n    }\n\n    row = row.sibling;\n  }\n\n  return lastContentRow;\n}\n\nfunction validateRevealOrder(revealOrder) {\n  {\n    if (revealOrder !== undefined && revealOrder !== 'forwards' && revealOrder !== 'backwards' && revealOrder !== 'together' && !didWarnAboutRevealOrder[revealOrder]) {\n      didWarnAboutRevealOrder[revealOrder] = true;\n\n      if (typeof revealOrder === 'string') {\n        switch (revealOrder.toLowerCase()) {\n          case 'together':\n          case 'forwards':\n          case 'backwards':\n            {\n              error('\"%s\" is not a valid value for revealOrder on <SuspenseList />. ' + 'Use lowercase \"%s\" instead.', revealOrder, revealOrder.toLowerCase());\n\n              break;\n            }\n\n          case 'forward':\n          case 'backward':\n            {\n              error('\"%s\" is not a valid value for revealOrder on <SuspenseList />. ' + 'React uses the -s suffix in the spelling. Use \"%ss\" instead.', revealOrder, revealOrder.toLowerCase());\n\n              break;\n            }\n\n          default:\n            error('\"%s\" is not a supported revealOrder on <SuspenseList />. ' + 'Did you mean \"together\", \"forwards\" or \"backwards\"?', revealOrder);\n\n            break;\n        }\n      } else {\n        error('%s is not a supported value for revealOrder on <SuspenseList />. ' + 'Did you mean \"together\", \"forwards\" or \"backwards\"?', revealOrder);\n      }\n    }\n  }\n}\n\nfunction validateTailOptions(tailMode, revealOrder) {\n  {\n    if (tailMode !== undefined && !didWarnAboutTailOptions[tailMode]) {\n      if (tailMode !== 'collapsed' && tailMode !== 'hidden') {\n        didWarnAboutTailOptions[tailMode] = true;\n\n        error('\"%s\" is not a supported value for tail on <SuspenseList />. ' + 'Did you mean \"collapsed\" or \"hidden\"?', tailMode);\n      } else if (revealOrder !== 'forwards' && revealOrder !== 'backwards') {\n        didWarnAboutTailOptions[tailMode] = true;\n\n        error('<SuspenseList tail=\"%s\" /> is only valid if revealOrder is ' + '\"forwards\" or \"backwards\". ' + 'Did you mean to specify revealOrder=\"forwards\"?', tailMode);\n      }\n    }\n  }\n}\n\nfunction validateSuspenseListNestedChild(childSlot, index) {\n  {\n    var isArray = Array.isArray(childSlot);\n    var isIterable = !isArray && typeof getIteratorFn(childSlot) === 'function';\n\n    if (isArray || isIterable) {\n      var type = isArray ? 'array' : 'iterable';\n\n      error('A nested %s was passed to row #%s in <SuspenseList />. Wrap it in ' + 'an additional SuspenseList to configure its revealOrder: ' + '<SuspenseList revealOrder=...> ... ' + '<SuspenseList revealOrder=...>{%s}</SuspenseList> ... ' + '</SuspenseList>', type, index, type);\n\n      return false;\n    }\n  }\n\n  return true;\n}\n\nfunction validateSuspenseListChildren(children, revealOrder) {\n  {\n    if ((revealOrder === 'forwards' || revealOrder === 'backwards') && children !== undefined && children !== null && children !== false) {\n      if (Array.isArray(children)) {\n        for (var i = 0; i < children.length; i++) {\n          if (!validateSuspenseListNestedChild(children[i], i)) {\n            return;\n          }\n        }\n      } else {\n        var iteratorFn = getIteratorFn(children);\n\n        if (typeof iteratorFn === 'function') {\n          var childrenIterator = iteratorFn.call(children);\n\n          if (childrenIterator) {\n            var step = childrenIterator.next();\n            var _i = 0;\n\n            for (; !step.done; step = childrenIterator.next()) {\n              if (!validateSuspenseListNestedChild(step.value, _i)) {\n                return;\n              }\n\n              _i++;\n            }\n          }\n        } else {\n          error('A single row was passed to a <SuspenseList revealOrder=\"%s\" />. ' + 'This is not useful since it needs multiple rows. ' + 'Did you mean to pass multiple children or an array?', revealOrder);\n        }\n      }\n    }\n  }\n}\n\nfunction initSuspenseListRenderState(workInProgress, isBackwards, tail, lastContentRow, tailMode, lastEffectBeforeRendering) {\n  var renderState = workInProgress.memoizedState;\n\n  if (renderState === null) {\n    workInProgress.memoizedState = {\n      isBackwards: isBackwards,\n      rendering: null,\n      renderingStartTime: 0,\n      last: lastContentRow,\n      tail: tail,\n      tailMode: tailMode,\n      lastEffect: lastEffectBeforeRendering\n    };\n  } else {\n    // We can reuse the existing object from previous renders.\n    renderState.isBackwards = isBackwards;\n    renderState.rendering = null;\n    renderState.renderingStartTime = 0;\n    renderState.last = lastContentRow;\n    renderState.tail = tail;\n    renderState.tailMode = tailMode;\n    renderState.lastEffect = lastEffectBeforeRendering;\n  }\n} // This can end up rendering this component multiple passes.\n// The first pass splits the children fibers into two sets. A head and tail.\n// We first render the head. If anything is in fallback state, we do another\n// pass through beginWork to rerender all children (including the tail) with\n// the force suspend context. If the first render didn't have anything in\n// in fallback state. Then we render each row in the tail one-by-one.\n// That happens in the completeWork phase without going back to beginWork.\n\n\nfunction updateSuspenseListComponent(current, workInProgress, renderLanes) {\n  var nextProps = workInProgress.pendingProps;\n  var revealOrder = nextProps.revealOrder;\n  var tailMode = nextProps.tail;\n  var newChildren = nextProps.children;\n  validateRevealOrder(revealOrder);\n  validateTailOptions(tailMode, revealOrder);\n  validateSuspenseListChildren(newChildren, revealOrder);\n  reconcileChildren(current, workInProgress, newChildren, renderLanes);\n  var suspenseContext = suspenseStackCursor.current;\n  var shouldForceFallback = hasSuspenseContext(suspenseContext, ForceSuspenseFallback);\n\n  if (shouldForceFallback) {\n    suspenseContext = setShallowSuspenseContext(suspenseContext, ForceSuspenseFallback);\n    workInProgress.flags |= DidCapture;\n  } else {\n    var didSuspendBefore = current !== null && (current.flags & DidCapture) !== NoFlags;\n\n    if (didSuspendBefore) {\n      // If we previously forced a fallback, we need to schedule work\n      // on any nested boundaries to let them know to try to render\n      // again. This is the same as context updating.\n      propagateSuspenseContextChange(workInProgress, workInProgress.child, renderLanes);\n    }\n\n    suspenseContext = setDefaultShallowSuspenseContext(suspenseContext);\n  }\n\n  pushSuspenseContext(workInProgress, suspenseContext);\n\n  if ((workInProgress.mode & BlockingMode) === NoMode) {\n    // In legacy mode, SuspenseList doesn't work so we just\n    // use make it a noop by treating it as the default revealOrder.\n    workInProgress.memoizedState = null;\n  } else {\n    switch (revealOrder) {\n      case 'forwards':\n        {\n          var lastContentRow = findLastContentRow(workInProgress.child);\n          var tail;\n\n          if (lastContentRow === null) {\n            // The whole list is part of the tail.\n            // TODO: We could fast path by just rendering the tail now.\n            tail = workInProgress.child;\n            workInProgress.child = null;\n          } else {\n            // Disconnect the tail rows after the content row.\n            // We're going to render them separately later.\n            tail = lastContentRow.sibling;\n            lastContentRow.sibling = null;\n          }\n\n          initSuspenseListRenderState(workInProgress, false, // isBackwards\n          tail, lastContentRow, tailMode, workInProgress.lastEffect);\n          break;\n        }\n\n      case 'backwards':\n        {\n          // We're going to find the first row that has existing content.\n          // At the same time we're going to reverse the list of everything\n          // we pass in the meantime. That's going to be our tail in reverse\n          // order.\n          var _tail = null;\n          var row = workInProgress.child;\n          workInProgress.child = null;\n\n          while (row !== null) {\n            var currentRow = row.alternate; // New rows can't be content rows.\n\n            if (currentRow !== null && findFirstSuspended(currentRow) === null) {\n              // This is the beginning of the main content.\n              workInProgress.child = row;\n              break;\n            }\n\n            var nextRow = row.sibling;\n            row.sibling = _tail;\n            _tail = row;\n            row = nextRow;\n          } // TODO: If workInProgress.child is null, we can continue on the tail immediately.\n\n\n          initSuspenseListRenderState(workInProgress, true, // isBackwards\n          _tail, null, // last\n          tailMode, workInProgress.lastEffect);\n          break;\n        }\n\n      case 'together':\n        {\n          initSuspenseListRenderState(workInProgress, false, // isBackwards\n          null, // tail\n          null, // last\n          undefined, workInProgress.lastEffect);\n          break;\n        }\n\n      default:\n        {\n          // The default reveal order is the same as not having\n          // a boundary.\n          workInProgress.memoizedState = null;\n        }\n    }\n  }\n\n  return workInProgress.child;\n}\n\nfunction updatePortalComponent(current, workInProgress, renderLanes) {\n  pushHostContainer(workInProgress, workInProgress.stateNode.containerInfo);\n  var nextChildren = workInProgress.pendingProps;\n\n  if (current === null) {\n    // Portals are special because we don't append the children during mount\n    // but at commit. Therefore we need to track insertions which the normal\n    // flow doesn't do during mount. This doesn't happen at the root because\n    // the root always starts with a \"current\" with a null child.\n    // TODO: Consider unifying this with how the root works.\n    workInProgress.child = reconcileChildFibers(workInProgress, null, nextChildren, renderLanes);\n  } else {\n    reconcileChildren(current, workInProgress, nextChildren, renderLanes);\n  }\n\n  return workInProgress.child;\n}\n\nvar hasWarnedAboutUsingNoValuePropOnContextProvider = false;\n\nfunction updateContextProvider(current, workInProgress, renderLanes) {\n  var providerType = workInProgress.type;\n  var context = providerType._context;\n  var newProps = workInProgress.pendingProps;\n  var oldProps = workInProgress.memoizedProps;\n  var newValue = newProps.value;\n\n  {\n    if (!('value' in newProps)) {\n      if (!hasWarnedAboutUsingNoValuePropOnContextProvider) {\n        hasWarnedAboutUsingNoValuePropOnContextProvider = true;\n\n        error('The `value` prop is required for the `<Context.Provider>`. Did you misspell it or forget to pass it?');\n      }\n    }\n\n    var providerPropTypes = workInProgress.type.propTypes;\n\n    if (providerPropTypes) {\n      checkPropTypes(providerPropTypes, newProps, 'prop', 'Context.Provider');\n    }\n  }\n\n  pushProvider(workInProgress, newValue);\n\n  if (oldProps !== null) {\n    var oldValue = oldProps.value;\n    var changedBits = calculateChangedBits(context, newValue, oldValue);\n\n    if (changedBits === 0) {\n      // No change. Bailout early if children are the same.\n      if (oldProps.children === newProps.children && !hasContextChanged()) {\n        return bailoutOnAlreadyFinishedWork(current, workInProgress, renderLanes);\n      }\n    } else {\n      // The context value changed. Search for matching consumers and schedule\n      // them to update.\n      propagateContextChange(workInProgress, context, changedBits, renderLanes);\n    }\n  }\n\n  var newChildren = newProps.children;\n  reconcileChildren(current, workInProgress, newChildren, renderLanes);\n  return workInProgress.child;\n}\n\nvar hasWarnedAboutUsingContextAsConsumer = false;\n\nfunction updateContextConsumer(current, workInProgress, renderLanes) {\n  var context = workInProgress.type; // The logic below for Context differs depending on PROD or DEV mode. In\n  // DEV mode, we create a separate object for Context.Consumer that acts\n  // like a proxy to Context. This proxy object adds unnecessary code in PROD\n  // so we use the old behaviour (Context.Consumer references Context) to\n  // reduce size and overhead. The separate object references context via\n  // a property called \"_context\", which also gives us the ability to check\n  // in DEV mode if this property exists or not and warn if it does not.\n\n  {\n    if (context._context === undefined) {\n      // This may be because it's a Context (rather than a Consumer).\n      // Or it may be because it's older React where they're the same thing.\n      // We only want to warn if we're sure it's a new React.\n      if (context !== context.Consumer) {\n        if (!hasWarnedAboutUsingContextAsConsumer) {\n          hasWarnedAboutUsingContextAsConsumer = true;\n\n          error('Rendering <Context> directly is not supported and will be removed in ' + 'a future major release. Did you mean to render <Context.Consumer> instead?');\n        }\n      }\n    } else {\n      context = context._context;\n    }\n  }\n\n  var newProps = workInProgress.pendingProps;\n  var render = newProps.children;\n\n  {\n    if (typeof render !== 'function') {\n      error('A context consumer was rendered with multiple children, or a child ' + \"that isn't a function. A context consumer expects a single child \" + 'that is a function. If you did pass a function, make sure there ' + 'is no trailing or leading whitespace around it.');\n    }\n  }\n\n  prepareToReadContext(workInProgress, renderLanes);\n  var newValue = readContext(context, newProps.unstable_observedBits);\n  var newChildren;\n\n  {\n    ReactCurrentOwner$1.current = workInProgress;\n    setIsRendering(true);\n    newChildren = render(newValue);\n    setIsRendering(false);\n  } // React DevTools reads this flag.\n\n\n  workInProgress.flags |= PerformedWork;\n  reconcileChildren(current, workInProgress, newChildren, renderLanes);\n  return workInProgress.child;\n}\n\nfunction markWorkInProgressReceivedUpdate() {\n  didReceiveUpdate = true;\n}\n\nfunction bailoutOnAlreadyFinishedWork(current, workInProgress, renderLanes) {\n  if (current !== null) {\n    // Reuse previous dependencies\n    workInProgress.dependencies = current.dependencies;\n  }\n\n  {\n    // Don't update \"base\" render times for bailouts.\n    stopProfilerTimerIfRunning();\n  }\n\n  markSkippedUpdateLanes(workInProgress.lanes); // Check if the children have any pending work.\n\n  if (!includesSomeLane(renderLanes, workInProgress.childLanes)) {\n    // The children don't have any work either. We can skip them.\n    // TODO: Once we add back resuming, we should check if the children are\n    // a work-in-progress set. If so, we need to transfer their effects.\n    return null;\n  } else {\n    // This fiber doesn't have work, but its subtree does. Clone the child\n    // fibers and continue.\n    cloneChildFibers(current, workInProgress);\n    return workInProgress.child;\n  }\n}\n\nfunction remountFiber(current, oldWorkInProgress, newWorkInProgress) {\n  {\n    var returnFiber = oldWorkInProgress.return;\n\n    if (returnFiber === null) {\n      throw new Error('Cannot swap the root fiber.');\n    } // Disconnect from the old current.\n    // It will get deleted.\n\n\n    current.alternate = null;\n    oldWorkInProgress.alternate = null; // Connect to the new tree.\n\n    newWorkInProgress.index = oldWorkInProgress.index;\n    newWorkInProgress.sibling = oldWorkInProgress.sibling;\n    newWorkInProgress.return = oldWorkInProgress.return;\n    newWorkInProgress.ref = oldWorkInProgress.ref; // Replace the child/sibling pointers above it.\n\n    if (oldWorkInProgress === returnFiber.child) {\n      returnFiber.child = newWorkInProgress;\n    } else {\n      var prevSibling = returnFiber.child;\n\n      if (prevSibling === null) {\n        throw new Error('Expected parent to have a child.');\n      }\n\n      while (prevSibling.sibling !== oldWorkInProgress) {\n        prevSibling = prevSibling.sibling;\n\n        if (prevSibling === null) {\n          throw new Error('Expected to find the previous sibling.');\n        }\n      }\n\n      prevSibling.sibling = newWorkInProgress;\n    } // Delete the old fiber and place the new one.\n    // Since the old fiber is disconnected, we have to schedule it manually.\n\n\n    var last = returnFiber.lastEffect;\n\n    if (last !== null) {\n      last.nextEffect = current;\n      returnFiber.lastEffect = current;\n    } else {\n      returnFiber.firstEffect = returnFiber.lastEffect = current;\n    }\n\n    current.nextEffect = null;\n    current.flags = Deletion;\n    newWorkInProgress.flags |= Placement; // Restart work from the new fiber.\n\n    return newWorkInProgress;\n  }\n}\n\nfunction beginWork(current, workInProgress, renderLanes) {\n  var updateLanes = workInProgress.lanes;\n\n  {\n    if (workInProgress._debugNeedsRemount && current !== null) {\n      // This will restart the begin phase with a new fiber.\n      return remountFiber(current, workInProgress, createFiberFromTypeAndProps(workInProgress.type, workInProgress.key, workInProgress.pendingProps, workInProgress._debugOwner || null, workInProgress.mode, workInProgress.lanes));\n    }\n  }\n\n  if (current !== null) {\n    var oldProps = current.memoizedProps;\n    var newProps = workInProgress.pendingProps;\n\n    if (oldProps !== newProps || hasContextChanged() || ( // Force a re-render if the implementation changed due to hot reload:\n     workInProgress.type !== current.type )) {\n      // If props or context changed, mark the fiber as having performed work.\n      // This may be unset if the props are determined to be equal later (memo).\n      didReceiveUpdate = true;\n    } else if (!includesSomeLane(renderLanes, updateLanes)) {\n      didReceiveUpdate = false; // This fiber does not have any pending work. Bailout without entering\n      // the begin phase. There's still some bookkeeping we that needs to be done\n      // in this optimized path, mostly pushing stuff onto the stack.\n\n      switch (workInProgress.tag) {\n        case HostRoot:\n          pushHostRootContext(workInProgress);\n          resetHydrationState();\n          break;\n\n        case HostComponent:\n          pushHostContext(workInProgress);\n          break;\n\n        case ClassComponent:\n          {\n            var Component = workInProgress.type;\n\n            if (isContextProvider(Component)) {\n              pushContextProvider(workInProgress);\n            }\n\n            break;\n          }\n\n        case HostPortal:\n          pushHostContainer(workInProgress, workInProgress.stateNode.containerInfo);\n          break;\n\n        case ContextProvider:\n          {\n            var newValue = workInProgress.memoizedProps.value;\n            pushProvider(workInProgress, newValue);\n            break;\n          }\n\n        case Profiler:\n          {\n            // Profiler should only call onRender when one of its descendants actually rendered.\n            var hasChildWork = includesSomeLane(renderLanes, workInProgress.childLanes);\n\n            if (hasChildWork) {\n              workInProgress.flags |= Update;\n            } // Reset effect durations for the next eventual effect phase.\n            // These are reset during render to allow the DevTools commit hook a chance to read them,\n\n\n            var stateNode = workInProgress.stateNode;\n            stateNode.effectDuration = 0;\n            stateNode.passiveEffectDuration = 0;\n          }\n\n          break;\n\n        case SuspenseComponent:\n          {\n            var state = workInProgress.memoizedState;\n\n            if (state !== null) {\n              // whether to retry the primary children, or to skip over it and\n              // go straight to the fallback. Check the priority of the primary\n              // child fragment.\n\n\n              var primaryChildFragment = workInProgress.child;\n              var primaryChildLanes = primaryChildFragment.childLanes;\n\n              if (includesSomeLane(renderLanes, primaryChildLanes)) {\n                // The primary children have pending work. Use the normal path\n                // to attempt to render the primary children again.\n                return updateSuspenseComponent(current, workInProgress, renderLanes);\n              } else {\n                // The primary child fragment does not have pending work marked\n                // on it\n                pushSuspenseContext(workInProgress, setDefaultShallowSuspenseContext(suspenseStackCursor.current)); // The primary children do not have pending work with sufficient\n                // priority. Bailout.\n\n                var child = bailoutOnAlreadyFinishedWork(current, workInProgress, renderLanes);\n\n                if (child !== null) {\n                  // The fallback children have pending work. Skip over the\n                  // primary children and work on the fallback.\n                  return child.sibling;\n                } else {\n                  return null;\n                }\n              }\n            } else {\n              pushSuspenseContext(workInProgress, setDefaultShallowSuspenseContext(suspenseStackCursor.current));\n            }\n\n            break;\n          }\n\n        case SuspenseListComponent:\n          {\n            var didSuspendBefore = (current.flags & DidCapture) !== NoFlags;\n\n            var _hasChildWork = includesSomeLane(renderLanes, workInProgress.childLanes);\n\n            if (didSuspendBefore) {\n              if (_hasChildWork) {\n                // If something was in fallback state last time, and we have all the\n                // same children then we're still in progressive loading state.\n                // Something might get unblocked by state updates or retries in the\n                // tree which will affect the tail. So we need to use the normal\n                // path to compute the correct tail.\n                return updateSuspenseListComponent(current, workInProgress, renderLanes);\n              } // If none of the children had any work, that means that none of\n              // them got retried so they'll still be blocked in the same way\n              // as before. We can fast bail out.\n\n\n              workInProgress.flags |= DidCapture;\n            } // If nothing suspended before and we're rendering the same children,\n            // then the tail doesn't matter. Anything new that suspends will work\n            // in the \"together\" mode, so we can continue from the state we had.\n\n\n            var renderState = workInProgress.memoizedState;\n\n            if (renderState !== null) {\n              // Reset to the \"together\" mode in case we've started a different\n              // update in the past but didn't complete it.\n              renderState.rendering = null;\n              renderState.tail = null;\n              renderState.lastEffect = null;\n            }\n\n            pushSuspenseContext(workInProgress, suspenseStackCursor.current);\n\n            if (_hasChildWork) {\n              break;\n            } else {\n              // If none of the children had any work, that means that none of\n              // them got retried so they'll still be blocked in the same way\n              // as before. We can fast bail out.\n              return null;\n            }\n          }\n\n        case OffscreenComponent:\n        case LegacyHiddenComponent:\n          {\n            // Need to check if the tree still needs to be deferred. This is\n            // almost identical to the logic used in the normal update path,\n            // so we'll just enter that. The only difference is we'll bail out\n            // at the next level instead of this one, because the child props\n            // have not changed. Which is fine.\n            // TODO: Probably should refactor `beginWork` to split the bailout\n            // path from the normal path. I'm tempted to do a labeled break here\n            // but I won't :)\n            workInProgress.lanes = NoLanes;\n            return updateOffscreenComponent(current, workInProgress, renderLanes);\n          }\n      }\n\n      return bailoutOnAlreadyFinishedWork(current, workInProgress, renderLanes);\n    } else {\n      if ((current.flags & ForceUpdateForLegacySuspense) !== NoFlags) {\n        // This is a special case that only exists for legacy mode.\n        // See https://github.com/facebook/react/pull/19216.\n        didReceiveUpdate = true;\n      } else {\n        // An update was scheduled on this fiber, but there are no new props\n        // nor legacy context. Set this to false. If an update queue or context\n        // consumer produces a changed value, it will set this to true. Otherwise,\n        // the component will assume the children have not changed and bail out.\n        didReceiveUpdate = false;\n      }\n    }\n  } else {\n    didReceiveUpdate = false;\n  } // Before entering the begin phase, clear pending update priority.\n  // TODO: This assumes that we're about to evaluate the component and process\n  // the update queue. However, there's an exception: SimpleMemoComponent\n  // sometimes bails out later in the begin phase. This indicates that we should\n  // move this assignment out of the common path and into each branch.\n\n\n  workInProgress.lanes = NoLanes;\n\n  switch (workInProgress.tag) {\n    case IndeterminateComponent:\n      {\n        return mountIndeterminateComponent(current, workInProgress, workInProgress.type, renderLanes);\n      }\n\n    case LazyComponent:\n      {\n        var elementType = workInProgress.elementType;\n        return mountLazyComponent(current, workInProgress, elementType, updateLanes, renderLanes);\n      }\n\n    case FunctionComponent:\n      {\n        var _Component = workInProgress.type;\n        var unresolvedProps = workInProgress.pendingProps;\n        var resolvedProps = workInProgress.elementType === _Component ? unresolvedProps : resolveDefaultProps(_Component, unresolvedProps);\n        return updateFunctionComponent(current, workInProgress, _Component, resolvedProps, renderLanes);\n      }\n\n    case ClassComponent:\n      {\n        var _Component2 = workInProgress.type;\n        var _unresolvedProps = workInProgress.pendingProps;\n\n        var _resolvedProps = workInProgress.elementType === _Component2 ? _unresolvedProps : resolveDefaultProps(_Component2, _unresolvedProps);\n\n        return updateClassComponent(current, workInProgress, _Component2, _resolvedProps, renderLanes);\n      }\n\n    case HostRoot:\n      return updateHostRoot(current, workInProgress, renderLanes);\n\n    case HostComponent:\n      return updateHostComponent(current, workInProgress, renderLanes);\n\n    case HostText:\n      return updateHostText(current, workInProgress);\n\n    case SuspenseComponent:\n      return updateSuspenseComponent(current, workInProgress, renderLanes);\n\n    case HostPortal:\n      return updatePortalComponent(current, workInProgress, renderLanes);\n\n    case ForwardRef:\n      {\n        var type = workInProgress.type;\n        var _unresolvedProps2 = workInProgress.pendingProps;\n\n        var _resolvedProps2 = workInProgress.elementType === type ? _unresolvedProps2 : resolveDefaultProps(type, _unresolvedProps2);\n\n        return updateForwardRef(current, workInProgress, type, _resolvedProps2, renderLanes);\n      }\n\n    case Fragment:\n      return updateFragment(current, workInProgress, renderLanes);\n\n    case Mode:\n      return updateMode(current, workInProgress, renderLanes);\n\n    case Profiler:\n      return updateProfiler(current, workInProgress, renderLanes);\n\n    case ContextProvider:\n      return updateContextProvider(current, workInProgress, renderLanes);\n\n    case ContextConsumer:\n      return updateContextConsumer(current, workInProgress, renderLanes);\n\n    case MemoComponent:\n      {\n        var _type2 = workInProgress.type;\n        var _unresolvedProps3 = workInProgress.pendingProps; // Resolve outer props first, then resolve inner props.\n\n        var _resolvedProps3 = resolveDefaultProps(_type2, _unresolvedProps3);\n\n        {\n          if (workInProgress.type !== workInProgress.elementType) {\n            var outerPropTypes = _type2.propTypes;\n\n            if (outerPropTypes) {\n              checkPropTypes(outerPropTypes, _resolvedProps3, // Resolved for outer only\n              'prop', getComponentName(_type2));\n            }\n          }\n        }\n\n        _resolvedProps3 = resolveDefaultProps(_type2.type, _resolvedProps3);\n        return updateMemoComponent(current, workInProgress, _type2, _resolvedProps3, updateLanes, renderLanes);\n      }\n\n    case SimpleMemoComponent:\n      {\n        return updateSimpleMemoComponent(current, workInProgress, workInProgress.type, workInProgress.pendingProps, updateLanes, renderLanes);\n      }\n\n    case IncompleteClassComponent:\n      {\n        var _Component3 = workInProgress.type;\n        var _unresolvedProps4 = workInProgress.pendingProps;\n\n        var _resolvedProps4 = workInProgress.elementType === _Component3 ? _unresolvedProps4 : resolveDefaultProps(_Component3, _unresolvedProps4);\n\n        return mountIncompleteClassComponent(current, workInProgress, _Component3, _resolvedProps4, renderLanes);\n      }\n\n    case SuspenseListComponent:\n      {\n        return updateSuspenseListComponent(current, workInProgress, renderLanes);\n      }\n\n    case FundamentalComponent:\n      {\n\n        break;\n      }\n\n    case ScopeComponent:\n      {\n\n        break;\n      }\n\n    case Block:\n      {\n\n        break;\n      }\n\n    case OffscreenComponent:\n      {\n        return updateOffscreenComponent(current, workInProgress, renderLanes);\n      }\n\n    case LegacyHiddenComponent:\n      {\n        return updateLegacyHiddenComponent(current, workInProgress, renderLanes);\n      }\n  }\n\n  {\n    {\n      throw Error( \"Unknown unit of work tag (\" + workInProgress.tag + \"). This error is likely caused by a bug in React. Please file an issue.\" );\n    }\n  }\n}\n\nfunction markUpdate(workInProgress) {\n  // Tag the fiber with an update effect. This turns a Placement into\n  // a PlacementAndUpdate.\n  workInProgress.flags |= Update;\n}\n\nfunction markRef$1(workInProgress) {\n  workInProgress.flags |= Ref;\n}\n\nvar appendAllChildren;\nvar updateHostContainer;\nvar updateHostComponent$1;\nvar updateHostText$1;\n\n{\n  // Mutation mode\n  appendAllChildren = function (parent, workInProgress, needsVisibilityToggle, isHidden) {\n    // We only have the top Fiber that was created but we need recurse down its\n    // children to find all the terminal nodes.\n    var node = workInProgress.child;\n\n    while (node !== null) {\n      if (node.tag === HostComponent || node.tag === HostText) {\n        appendInitialChild(parent, node.stateNode);\n      } else if (node.tag === HostPortal) ; else if (node.child !== null) {\n        node.child.return = node;\n        node = node.child;\n        continue;\n      }\n\n      if (node === workInProgress) {\n        return;\n      }\n\n      while (node.sibling === null) {\n        if (node.return === null || node.return === workInProgress) {\n          return;\n        }\n\n        node = node.return;\n      }\n\n      node.sibling.return = node.return;\n      node = node.sibling;\n    }\n  };\n\n  updateHostContainer = function (workInProgress) {// Noop\n  };\n\n  updateHostComponent$1 = function (current, workInProgress, type, newProps, rootContainerInstance) {\n    // If we have an alternate, that means this is an update and we need to\n    // schedule a side-effect to do the updates.\n    var oldProps = current.memoizedProps;\n\n    if (oldProps === newProps) {\n      // In mutation mode, this is sufficient for a bailout because\n      // we won't touch this node even if children changed.\n      return;\n    } // If we get updated because one of our children updated, we don't\n    // have newProps so we'll have to reuse them.\n    // TODO: Split the update API as separate for the props vs. children.\n    // Even better would be if children weren't special cased at all tho.\n\n\n    var instance = workInProgress.stateNode;\n    var currentHostContext = getHostContext(); // TODO: Experiencing an error where oldProps is null. Suggests a host\n    // component is hitting the resume path. Figure out why. Possibly\n    // related to `hidden`.\n\n    var updatePayload = prepareUpdate(instance, type, oldProps, newProps, rootContainerInstance, currentHostContext); // TODO: Type this specific to this type of component.\n\n    workInProgress.updateQueue = updatePayload; // If the update payload indicates that there is a change or if there\n    // is a new ref we mark this as an update. All the work is done in commitWork.\n\n    if (updatePayload) {\n      markUpdate(workInProgress);\n    }\n  };\n\n  updateHostText$1 = function (current, workInProgress, oldText, newText) {\n    // If the text differs, mark it as an update. All the work in done in commitWork.\n    if (oldText !== newText) {\n      markUpdate(workInProgress);\n    }\n  };\n}\n\nfunction cutOffTailIfNeeded(renderState, hasRenderedATailFallback) {\n  if (getIsHydrating()) {\n    // If we're hydrating, we should consume as many items as we can\n    // so we don't leave any behind.\n    return;\n  }\n\n  switch (renderState.tailMode) {\n    case 'hidden':\n      {\n        // Any insertions at the end of the tail list after this point\n        // should be invisible. If there are already mounted boundaries\n        // anything before them are not considered for collapsing.\n        // Therefore we need to go through the whole tail to find if\n        // there are any.\n        var tailNode = renderState.tail;\n        var lastTailNode = null;\n\n        while (tailNode !== null) {\n          if (tailNode.alternate !== null) {\n            lastTailNode = tailNode;\n          }\n\n          tailNode = tailNode.sibling;\n        } // Next we're simply going to delete all insertions after the\n        // last rendered item.\n\n\n        if (lastTailNode === null) {\n          // All remaining items in the tail are insertions.\n          renderState.tail = null;\n        } else {\n          // Detach the insertion after the last node that was already\n          // inserted.\n          lastTailNode.sibling = null;\n        }\n\n        break;\n      }\n\n    case 'collapsed':\n      {\n        // Any insertions at the end of the tail list after this point\n        // should be invisible. If there are already mounted boundaries\n        // anything before them are not considered for collapsing.\n        // Therefore we need to go through the whole tail to find if\n        // there are any.\n        var _tailNode = renderState.tail;\n        var _lastTailNode = null;\n\n        while (_tailNode !== null) {\n          if (_tailNode.alternate !== null) {\n            _lastTailNode = _tailNode;\n          }\n\n          _tailNode = _tailNode.sibling;\n        } // Next we're simply going to delete all insertions after the\n        // last rendered item.\n\n\n        if (_lastTailNode === null) {\n          // All remaining items in the tail are insertions.\n          if (!hasRenderedATailFallback && renderState.tail !== null) {\n            // We suspended during the head. We want to show at least one\n            // row at the tail. So we'll keep on and cut off the rest.\n            renderState.tail.sibling = null;\n          } else {\n            renderState.tail = null;\n          }\n        } else {\n          // Detach the insertion after the last node that was already\n          // inserted.\n          _lastTailNode.sibling = null;\n        }\n\n        break;\n      }\n  }\n}\n\nfunction completeWork(current, workInProgress, renderLanes) {\n  var newProps = workInProgress.pendingProps;\n\n  switch (workInProgress.tag) {\n    case IndeterminateComponent:\n    case LazyComponent:\n    case SimpleMemoComponent:\n    case FunctionComponent:\n    case ForwardRef:\n    case Fragment:\n    case Mode:\n    case Profiler:\n    case ContextConsumer:\n    case MemoComponent:\n      return null;\n\n    case ClassComponent:\n      {\n        var Component = workInProgress.type;\n\n        if (isContextProvider(Component)) {\n          popContext(workInProgress);\n        }\n\n        return null;\n      }\n\n    case HostRoot:\n      {\n        popHostContainer(workInProgress);\n        popTopLevelContextObject(workInProgress);\n        resetWorkInProgressVersions();\n        var fiberRoot = workInProgress.stateNode;\n\n        if (fiberRoot.pendingContext) {\n          fiberRoot.context = fiberRoot.pendingContext;\n          fiberRoot.pendingContext = null;\n        }\n\n        if (current === null || current.child === null) {\n          // If we hydrated, pop so that we can delete any remaining children\n          // that weren't hydrated.\n          var wasHydrated = popHydrationState(workInProgress);\n\n          if (wasHydrated) {\n            // If we hydrated, then we'll need to schedule an update for\n            // the commit side-effects on the root.\n            markUpdate(workInProgress);\n          } else if (!fiberRoot.hydrate) {\n            // Schedule an effect to clear this container at the start of the next commit.\n            // This handles the case of React rendering into a container with previous children.\n            // It's also safe to do for updates too, because current.child would only be null\n            // if the previous render was null (so the the container would already be empty).\n            workInProgress.flags |= Snapshot;\n          }\n        }\n\n        updateHostContainer(workInProgress);\n        return null;\n      }\n\n    case HostComponent:\n      {\n        popHostContext(workInProgress);\n        var rootContainerInstance = getRootHostContainer();\n        var type = workInProgress.type;\n\n        if (current !== null && workInProgress.stateNode != null) {\n          updateHostComponent$1(current, workInProgress, type, newProps, rootContainerInstance);\n\n          if (current.ref !== workInProgress.ref) {\n            markRef$1(workInProgress);\n          }\n        } else {\n          if (!newProps) {\n            if (!(workInProgress.stateNode !== null)) {\n              {\n                throw Error( \"We must have new props for new mounts. This error is likely caused by a bug in React. Please file an issue.\" );\n              }\n            } // This can happen when we abort work.\n\n\n            return null;\n          }\n\n          var currentHostContext = getHostContext(); // TODO: Move createInstance to beginWork and keep it on a context\n          // \"stack\" as the parent. Then append children as we go in beginWork\n          // or completeWork depending on whether we want to add them top->down or\n          // bottom->up. Top->down is faster in IE11.\n\n          var _wasHydrated = popHydrationState(workInProgress);\n\n          if (_wasHydrated) {\n            // TODO: Move this and createInstance step into the beginPhase\n            // to consolidate.\n            if (prepareToHydrateHostInstance(workInProgress, rootContainerInstance, currentHostContext)) {\n              // If changes to the hydrated node need to be applied at the\n              // commit-phase we mark this as such.\n              markUpdate(workInProgress);\n            }\n          } else {\n            var instance = createInstance(type, newProps, rootContainerInstance, currentHostContext, workInProgress);\n            appendAllChildren(instance, workInProgress, false, false);\n            workInProgress.stateNode = instance; // Certain renderers require commit-time effects for initial mount.\n            // (eg DOM renderer supports auto-focus for certain elements).\n            // Make sure such renderers get scheduled for later work.\n\n            if (finalizeInitialChildren(instance, type, newProps, rootContainerInstance)) {\n              markUpdate(workInProgress);\n            }\n          }\n\n          if (workInProgress.ref !== null) {\n            // If there is a ref on a host node we need to schedule a callback\n            markRef$1(workInProgress);\n          }\n        }\n\n        return null;\n      }\n\n    case HostText:\n      {\n        var newText = newProps;\n\n        if (current && workInProgress.stateNode != null) {\n          var oldText = current.memoizedProps; // If we have an alternate, that means this is an update and we need\n          // to schedule a side-effect to do the updates.\n\n          updateHostText$1(current, workInProgress, oldText, newText);\n        } else {\n          if (typeof newText !== 'string') {\n            if (!(workInProgress.stateNode !== null)) {\n              {\n                throw Error( \"We must have new props for new mounts. This error is likely caused by a bug in React. Please file an issue.\" );\n              }\n            } // This can happen when we abort work.\n\n          }\n\n          var _rootContainerInstance = getRootHostContainer();\n\n          var _currentHostContext = getHostContext();\n\n          var _wasHydrated2 = popHydrationState(workInProgress);\n\n          if (_wasHydrated2) {\n            if (prepareToHydrateHostTextInstance(workInProgress)) {\n              markUpdate(workInProgress);\n            }\n          } else {\n            workInProgress.stateNode = createTextInstance(newText, _rootContainerInstance, _currentHostContext, workInProgress);\n          }\n        }\n\n        return null;\n      }\n\n    case SuspenseComponent:\n      {\n        popSuspenseContext(workInProgress);\n        var nextState = workInProgress.memoizedState;\n\n        if ((workInProgress.flags & DidCapture) !== NoFlags) {\n          // Something suspended. Re-render with the fallback children.\n          workInProgress.lanes = renderLanes; // Do not reset the effect list.\n\n          if ( (workInProgress.mode & ProfileMode) !== NoMode) {\n            transferActualDuration(workInProgress);\n          }\n\n          return workInProgress;\n        }\n\n        var nextDidTimeout = nextState !== null;\n        var prevDidTimeout = false;\n\n        if (current === null) {\n          if (workInProgress.memoizedProps.fallback !== undefined) {\n            popHydrationState(workInProgress);\n          }\n        } else {\n          var prevState = current.memoizedState;\n          prevDidTimeout = prevState !== null;\n        }\n\n        if (nextDidTimeout && !prevDidTimeout) {\n          // If this subtreee is running in blocking mode we can suspend,\n          // otherwise we won't suspend.\n          // TODO: This will still suspend a synchronous tree if anything\n          // in the concurrent tree already suspended during this render.\n          // This is a known bug.\n          if ((workInProgress.mode & BlockingMode) !== NoMode) {\n            // TODO: Move this back to throwException because this is too late\n            // if this is a large tree which is common for initial loads. We\n            // don't know if we should restart a render or not until we get\n            // this marker, and this is too late.\n            // If this render already had a ping or lower pri updates,\n            // and this is the first time we know we're going to suspend we\n            // should be able to immediately restart from within throwException.\n            var hasInvisibleChildContext = current === null && workInProgress.memoizedProps.unstable_avoidThisFallback !== true;\n\n            if (hasInvisibleChildContext || hasSuspenseContext(suspenseStackCursor.current, InvisibleParentSuspenseContext)) {\n              // If this was in an invisible tree or a new render, then showing\n              // this boundary is ok.\n              renderDidSuspend();\n            } else {\n              // Otherwise, we're going to have to hide content so we should\n              // suspend for longer if possible.\n              renderDidSuspendDelayIfPossible();\n            }\n          }\n        }\n\n        {\n          // TODO: Only schedule updates if these values are non equal, i.e. it changed.\n          if (nextDidTimeout || prevDidTimeout) {\n            // If this boundary just timed out, schedule an effect to attach a\n            // retry listener to the promise. This flag is also used to hide the\n            // primary children. In mutation mode, we also need the flag to\n            // *unhide* children that were previously hidden, so check if this\n            // is currently timed out, too.\n            workInProgress.flags |= Update;\n          }\n        }\n\n        return null;\n      }\n\n    case HostPortal:\n      popHostContainer(workInProgress);\n      updateHostContainer(workInProgress);\n\n      if (current === null) {\n        preparePortalMount(workInProgress.stateNode.containerInfo);\n      }\n\n      return null;\n\n    case ContextProvider:\n      // Pop provider fiber\n      popProvider(workInProgress);\n      return null;\n\n    case IncompleteClassComponent:\n      {\n        // Same as class component case. I put it down here so that the tags are\n        // sequential to ensure this switch is compiled to a jump table.\n        var _Component = workInProgress.type;\n\n        if (isContextProvider(_Component)) {\n          popContext(workInProgress);\n        }\n\n        return null;\n      }\n\n    case SuspenseListComponent:\n      {\n        popSuspenseContext(workInProgress);\n        var renderState = workInProgress.memoizedState;\n\n        if (renderState === null) {\n          // We're running in the default, \"independent\" mode.\n          // We don't do anything in this mode.\n          return null;\n        }\n\n        var didSuspendAlready = (workInProgress.flags & DidCapture) !== NoFlags;\n        var renderedTail = renderState.rendering;\n\n        if (renderedTail === null) {\n          // We just rendered the head.\n          if (!didSuspendAlready) {\n            // This is the first pass. We need to figure out if anything is still\n            // suspended in the rendered set.\n            // If new content unsuspended, but there's still some content that\n            // didn't. Then we need to do a second pass that forces everything\n            // to keep showing their fallbacks.\n            // We might be suspended if something in this render pass suspended, or\n            // something in the previous committed pass suspended. Otherwise,\n            // there's no chance so we can skip the expensive call to\n            // findFirstSuspended.\n            var cannotBeSuspended = renderHasNotSuspendedYet() && (current === null || (current.flags & DidCapture) === NoFlags);\n\n            if (!cannotBeSuspended) {\n              var row = workInProgress.child;\n\n              while (row !== null) {\n                var suspended = findFirstSuspended(row);\n\n                if (suspended !== null) {\n                  didSuspendAlready = true;\n                  workInProgress.flags |= DidCapture;\n                  cutOffTailIfNeeded(renderState, false); // If this is a newly suspended tree, it might not get committed as\n                  // part of the second pass. In that case nothing will subscribe to\n                  // its thennables. Instead, we'll transfer its thennables to the\n                  // SuspenseList so that it can retry if they resolve.\n                  // There might be multiple of these in the list but since we're\n                  // going to wait for all of them anyway, it doesn't really matter\n                  // which ones gets to ping. In theory we could get clever and keep\n                  // track of how many dependencies remain but it gets tricky because\n                  // in the meantime, we can add/remove/change items and dependencies.\n                  // We might bail out of the loop before finding any but that\n                  // doesn't matter since that means that the other boundaries that\n                  // we did find already has their listeners attached.\n\n                  var newThennables = suspended.updateQueue;\n\n                  if (newThennables !== null) {\n                    workInProgress.updateQueue = newThennables;\n                    workInProgress.flags |= Update;\n                  } // Rerender the whole list, but this time, we'll force fallbacks\n                  // to stay in place.\n                  // Reset the effect list before doing the second pass since that's now invalid.\n\n\n                  if (renderState.lastEffect === null) {\n                    workInProgress.firstEffect = null;\n                  }\n\n                  workInProgress.lastEffect = renderState.lastEffect; // Reset the child fibers to their original state.\n\n                  resetChildFibers(workInProgress, renderLanes); // Set up the Suspense Context to force suspense and immediately\n                  // rerender the children.\n\n                  pushSuspenseContext(workInProgress, setShallowSuspenseContext(suspenseStackCursor.current, ForceSuspenseFallback));\n                  return workInProgress.child;\n                }\n\n                row = row.sibling;\n              }\n            }\n\n            if (renderState.tail !== null && now() > getRenderTargetTime()) {\n              // We have already passed our CPU deadline but we still have rows\n              // left in the tail. We'll just give up further attempts to render\n              // the main content and only render fallbacks.\n              workInProgress.flags |= DidCapture;\n              didSuspendAlready = true;\n              cutOffTailIfNeeded(renderState, false); // Since nothing actually suspended, there will nothing to ping this\n              // to get it started back up to attempt the next item. While in terms\n              // of priority this work has the same priority as this current render,\n              // it's not part of the same transition once the transition has\n              // committed. If it's sync, we still want to yield so that it can be\n              // painted. Conceptually, this is really the same as pinging.\n              // We can use any RetryLane even if it's the one currently rendering\n              // since we're leaving it behind on this node.\n\n              workInProgress.lanes = SomeRetryLane;\n\n              {\n                markSpawnedWork(SomeRetryLane);\n              }\n            }\n          } else {\n            cutOffTailIfNeeded(renderState, false);\n          } // Next we're going to render the tail.\n\n        } else {\n          // Append the rendered row to the child list.\n          if (!didSuspendAlready) {\n            var _suspended = findFirstSuspended(renderedTail);\n\n            if (_suspended !== null) {\n              workInProgress.flags |= DidCapture;\n              didSuspendAlready = true; // Ensure we transfer the update queue to the parent so that it doesn't\n              // get lost if this row ends up dropped during a second pass.\n\n              var _newThennables = _suspended.updateQueue;\n\n              if (_newThennables !== null) {\n                workInProgress.updateQueue = _newThennables;\n                workInProgress.flags |= Update;\n              }\n\n              cutOffTailIfNeeded(renderState, true); // This might have been modified.\n\n              if (renderState.tail === null && renderState.tailMode === 'hidden' && !renderedTail.alternate && !getIsHydrating() // We don't cut it if we're hydrating.\n              ) {\n                  // We need to delete the row we just rendered.\n                  // Reset the effect list to what it was before we rendered this\n                  // child. The nested children have already appended themselves.\n                  var lastEffect = workInProgress.lastEffect = renderState.lastEffect; // Remove any effects that were appended after this point.\n\n                  if (lastEffect !== null) {\n                    lastEffect.nextEffect = null;\n                  } // We're done.\n\n\n                  return null;\n                }\n            } else if ( // The time it took to render last row is greater than the remaining\n            // time we have to render. So rendering one more row would likely\n            // exceed it.\n            now() * 2 - renderState.renderingStartTime > getRenderTargetTime() && renderLanes !== OffscreenLane) {\n              // We have now passed our CPU deadline and we'll just give up further\n              // attempts to render the main content and only render fallbacks.\n              // The assumption is that this is usually faster.\n              workInProgress.flags |= DidCapture;\n              didSuspendAlready = true;\n              cutOffTailIfNeeded(renderState, false); // Since nothing actually suspended, there will nothing to ping this\n              // to get it started back up to attempt the next item. While in terms\n              // of priority this work has the same priority as this current render,\n              // it's not part of the same transition once the transition has\n              // committed. If it's sync, we still want to yield so that it can be\n              // painted. Conceptually, this is really the same as pinging.\n              // We can use any RetryLane even if it's the one currently rendering\n              // since we're leaving it behind on this node.\n\n              workInProgress.lanes = SomeRetryLane;\n\n              {\n                markSpawnedWork(SomeRetryLane);\n              }\n            }\n          }\n\n          if (renderState.isBackwards) {\n            // The effect list of the backwards tail will have been added\n            // to the end. This breaks the guarantee that life-cycles fire in\n            // sibling order but that isn't a strong guarantee promised by React.\n            // Especially since these might also just pop in during future commits.\n            // Append to the beginning of the list.\n            renderedTail.sibling = workInProgress.child;\n            workInProgress.child = renderedTail;\n          } else {\n            var previousSibling = renderState.last;\n\n            if (previousSibling !== null) {\n              previousSibling.sibling = renderedTail;\n            } else {\n              workInProgress.child = renderedTail;\n            }\n\n            renderState.last = renderedTail;\n          }\n        }\n\n        if (renderState.tail !== null) {\n          // We still have tail rows to render.\n          // Pop a row.\n          var next = renderState.tail;\n          renderState.rendering = next;\n          renderState.tail = next.sibling;\n          renderState.lastEffect = workInProgress.lastEffect;\n          renderState.renderingStartTime = now();\n          next.sibling = null; // Restore the context.\n          // TODO: We can probably just avoid popping it instead and only\n          // setting it the first time we go from not suspended to suspended.\n\n          var suspenseContext = suspenseStackCursor.current;\n\n          if (didSuspendAlready) {\n            suspenseContext = setShallowSuspenseContext(suspenseContext, ForceSuspenseFallback);\n          } else {\n            suspenseContext = setDefaultShallowSuspenseContext(suspenseContext);\n          }\n\n          pushSuspenseContext(workInProgress, suspenseContext); // Do a pass over the next row.\n\n          return next;\n        }\n\n        return null;\n      }\n\n    case FundamentalComponent:\n      {\n\n        break;\n      }\n\n    case ScopeComponent:\n      {\n\n        break;\n      }\n\n    case Block:\n\n      break;\n\n    case OffscreenComponent:\n    case LegacyHiddenComponent:\n      {\n        popRenderLanes(workInProgress);\n\n        if (current !== null) {\n          var _nextState = workInProgress.memoizedState;\n          var _prevState = current.memoizedState;\n          var prevIsHidden = _prevState !== null;\n          var nextIsHidden = _nextState !== null;\n\n          if (prevIsHidden !== nextIsHidden && newProps.mode !== 'unstable-defer-without-hiding') {\n            workInProgress.flags |= Update;\n          }\n        }\n\n        return null;\n      }\n  }\n\n  {\n    {\n      throw Error( \"Unknown unit of work tag (\" + workInProgress.tag + \"). This error is likely caused by a bug in React. Please file an issue.\" );\n    }\n  }\n}\n\nfunction unwindWork(workInProgress, renderLanes) {\n  switch (workInProgress.tag) {\n    case ClassComponent:\n      {\n        var Component = workInProgress.type;\n\n        if (isContextProvider(Component)) {\n          popContext(workInProgress);\n        }\n\n        var flags = workInProgress.flags;\n\n        if (flags & ShouldCapture) {\n          workInProgress.flags = flags & ~ShouldCapture | DidCapture;\n\n          if ( (workInProgress.mode & ProfileMode) !== NoMode) {\n            transferActualDuration(workInProgress);\n          }\n\n          return workInProgress;\n        }\n\n        return null;\n      }\n\n    case HostRoot:\n      {\n        popHostContainer(workInProgress);\n        popTopLevelContextObject(workInProgress);\n        resetWorkInProgressVersions();\n        var _flags = workInProgress.flags;\n\n        if (!((_flags & DidCapture) === NoFlags)) {\n          {\n            throw Error( \"The root failed to unmount after an error. This is likely a bug in React. Please file an issue.\" );\n          }\n        }\n\n        workInProgress.flags = _flags & ~ShouldCapture | DidCapture;\n        return workInProgress;\n      }\n\n    case HostComponent:\n      {\n        // TODO: popHydrationState\n        popHostContext(workInProgress);\n        return null;\n      }\n\n    case SuspenseComponent:\n      {\n        popSuspenseContext(workInProgress);\n\n        var _flags2 = workInProgress.flags;\n\n        if (_flags2 & ShouldCapture) {\n          workInProgress.flags = _flags2 & ~ShouldCapture | DidCapture; // Captured a suspense effect. Re-render the boundary.\n\n          if ( (workInProgress.mode & ProfileMode) !== NoMode) {\n            transferActualDuration(workInProgress);\n          }\n\n          return workInProgress;\n        }\n\n        return null;\n      }\n\n    case SuspenseListComponent:\n      {\n        popSuspenseContext(workInProgress); // SuspenseList doesn't actually catch anything. It should've been\n        // caught by a nested boundary. If not, it should bubble through.\n\n        return null;\n      }\n\n    case HostPortal:\n      popHostContainer(workInProgress);\n      return null;\n\n    case ContextProvider:\n      popProvider(workInProgress);\n      return null;\n\n    case OffscreenComponent:\n    case LegacyHiddenComponent:\n      popRenderLanes(workInProgress);\n      return null;\n\n    default:\n      return null;\n  }\n}\n\nfunction unwindInterruptedWork(interruptedWork) {\n  switch (interruptedWork.tag) {\n    case ClassComponent:\n      {\n        var childContextTypes = interruptedWork.type.childContextTypes;\n\n        if (childContextTypes !== null && childContextTypes !== undefined) {\n          popContext(interruptedWork);\n        }\n\n        break;\n      }\n\n    case HostRoot:\n      {\n        popHostContainer(interruptedWork);\n        popTopLevelContextObject(interruptedWork);\n        resetWorkInProgressVersions();\n        break;\n      }\n\n    case HostComponent:\n      {\n        popHostContext(interruptedWork);\n        break;\n      }\n\n    case HostPortal:\n      popHostContainer(interruptedWork);\n      break;\n\n    case SuspenseComponent:\n      popSuspenseContext(interruptedWork);\n      break;\n\n    case SuspenseListComponent:\n      popSuspenseContext(interruptedWork);\n      break;\n\n    case ContextProvider:\n      popProvider(interruptedWork);\n      break;\n\n    case OffscreenComponent:\n    case LegacyHiddenComponent:\n      popRenderLanes(interruptedWork);\n      break;\n  }\n}\n\nfunction createCapturedValue(value, source) {\n  // If the value is an error, call this function immediately after it is thrown\n  // so the stack is accurate.\n  return {\n    value: value,\n    source: source,\n    stack: getStackByFiberInDevAndProd(source)\n  };\n}\n\n// This module is forked in different environments.\n// By default, return `true` to log errors to the console.\n// Forks can return `false` if this isn't desirable.\nfunction showErrorDialog(boundary, errorInfo) {\n  return true;\n}\n\nfunction logCapturedError(boundary, errorInfo) {\n  try {\n    var logError = showErrorDialog(boundary, errorInfo); // Allow injected showErrorDialog() to prevent default console.error logging.\n    // This enables renderers like ReactNative to better manage redbox behavior.\n\n    if (logError === false) {\n      return;\n    }\n\n    var error = errorInfo.value;\n\n    if (true) {\n      var source = errorInfo.source;\n      var stack = errorInfo.stack;\n      var componentStack = stack !== null ? stack : ''; // Browsers support silencing uncaught errors by calling\n      // `preventDefault()` in window `error` handler.\n      // We record this information as an expando on the error.\n\n      if (error != null && error._suppressLogging) {\n        if (boundary.tag === ClassComponent) {\n          // The error is recoverable and was silenced.\n          // Ignore it and don't print the stack addendum.\n          // This is handy for testing error boundaries without noise.\n          return;\n        } // The error is fatal. Since the silencing might have\n        // been accidental, we'll surface it anyway.\n        // However, the browser would have silenced the original error\n        // so we'll print it first, and then print the stack addendum.\n\n\n        console['error'](error); // Don't transform to our wrapper\n        // For a more detailed description of this block, see:\n        // https://github.com/facebook/react/pull/13384\n      }\n\n      var componentName = source ? getComponentName(source.type) : null;\n      var componentNameMessage = componentName ? \"The above error occurred in the <\" + componentName + \"> component:\" : 'The above error occurred in one of your React components:';\n      var errorBoundaryMessage;\n      var errorBoundaryName = getComponentName(boundary.type);\n\n      if (errorBoundaryName) {\n        errorBoundaryMessage = \"React will try to recreate this component tree from scratch \" + (\"using the error boundary you provided, \" + errorBoundaryName + \".\");\n      } else {\n        errorBoundaryMessage = 'Consider adding an error boundary to your tree to customize error handling behavior.\\n' + 'Visit https://reactjs.org/link/error-boundaries to learn more about error boundaries.';\n      }\n\n      var combinedMessage = componentNameMessage + \"\\n\" + componentStack + \"\\n\\n\" + (\"\" + errorBoundaryMessage); // In development, we provide our own message with just the component stack.\n      // We don't include the original error message and JS stack because the browser\n      // has already printed it. Even if the application swallows the error, it is still\n      // displayed by the browser thanks to the DEV-only fake event trick in ReactErrorUtils.\n\n      console['error'](combinedMessage); // Don't transform to our wrapper\n    } else {\n      // In production, we print the error directly.\n      // This will include the message, the JS stack, and anything the browser wants to show.\n      // We pass the error object instead of custom message so that the browser displays the error natively.\n      console['error'](error); // Don't transform to our wrapper\n    }\n  } catch (e) {\n    // This method must not throw, or React internal state will get messed up.\n    // If console.error is overridden, or logCapturedError() shows a dialog that throws,\n    // we want to report this error outside of the normal stack as a last resort.\n    // https://github.com/facebook/react/issues/13188\n    setTimeout(function () {\n      throw e;\n    });\n  }\n}\n\nvar PossiblyWeakMap$1 = typeof WeakMap === 'function' ? WeakMap : Map;\n\nfunction createRootErrorUpdate(fiber, errorInfo, lane) {\n  var update = createUpdate(NoTimestamp, lane); // Unmount the root by rendering null.\n\n  update.tag = CaptureUpdate; // Caution: React DevTools currently depends on this property\n  // being called \"element\".\n\n  update.payload = {\n    element: null\n  };\n  var error = errorInfo.value;\n\n  update.callback = function () {\n    onUncaughtError(error);\n    logCapturedError(fiber, errorInfo);\n  };\n\n  return update;\n}\n\nfunction createClassErrorUpdate(fiber, errorInfo, lane) {\n  var update = createUpdate(NoTimestamp, lane);\n  update.tag = CaptureUpdate;\n  var getDerivedStateFromError = fiber.type.getDerivedStateFromError;\n\n  if (typeof getDerivedStateFromError === 'function') {\n    var error$1 = errorInfo.value;\n\n    update.payload = function () {\n      logCapturedError(fiber, errorInfo);\n      return getDerivedStateFromError(error$1);\n    };\n  }\n\n  var inst = fiber.stateNode;\n\n  if (inst !== null && typeof inst.componentDidCatch === 'function') {\n    update.callback = function callback() {\n      {\n        markFailedErrorBoundaryForHotReloading(fiber);\n      }\n\n      if (typeof getDerivedStateFromError !== 'function') {\n        // To preserve the preexisting retry behavior of error boundaries,\n        // we keep track of which ones already failed during this batch.\n        // This gets reset before we yield back to the browser.\n        // TODO: Warn in strict mode if getDerivedStateFromError is\n        // not defined.\n        markLegacyErrorBoundaryAsFailed(this); // Only log here if componentDidCatch is the only error boundary method defined\n\n        logCapturedError(fiber, errorInfo);\n      }\n\n      var error$1 = errorInfo.value;\n      var stack = errorInfo.stack;\n      this.componentDidCatch(error$1, {\n        componentStack: stack !== null ? stack : ''\n      });\n\n      {\n        if (typeof getDerivedStateFromError !== 'function') {\n          // If componentDidCatch is the only error boundary method defined,\n          // then it needs to call setState to recover from errors.\n          // If no state update is scheduled then the boundary will swallow the error.\n          if (!includesSomeLane(fiber.lanes, SyncLane)) {\n            error('%s: Error boundaries should implement getDerivedStateFromError(). ' + 'In that method, return a state update to display an error message or fallback UI.', getComponentName(fiber.type) || 'Unknown');\n          }\n        }\n      }\n    };\n  } else {\n    update.callback = function () {\n      markFailedErrorBoundaryForHotReloading(fiber);\n    };\n  }\n\n  return update;\n}\n\nfunction attachPingListener(root, wakeable, lanes) {\n  // Attach a listener to the promise to \"ping\" the root and retry. But only if\n  // one does not already exist for the lanes we're currently rendering (which\n  // acts like a \"thread ID\" here).\n  var pingCache = root.pingCache;\n  var threadIDs;\n\n  if (pingCache === null) {\n    pingCache = root.pingCache = new PossiblyWeakMap$1();\n    threadIDs = new Set();\n    pingCache.set(wakeable, threadIDs);\n  } else {\n    threadIDs = pingCache.get(wakeable);\n\n    if (threadIDs === undefined) {\n      threadIDs = new Set();\n      pingCache.set(wakeable, threadIDs);\n    }\n  }\n\n  if (!threadIDs.has(lanes)) {\n    // Memoize using the thread ID to prevent redundant listeners.\n    threadIDs.add(lanes);\n    var ping = pingSuspendedRoot.bind(null, root, wakeable, lanes);\n    wakeable.then(ping, ping);\n  }\n}\n\nfunction throwException(root, returnFiber, sourceFiber, value, rootRenderLanes) {\n  // The source fiber did not complete.\n  sourceFiber.flags |= Incomplete; // Its effect list is no longer valid.\n\n  sourceFiber.firstEffect = sourceFiber.lastEffect = null;\n\n  if (value !== null && typeof value === 'object' && typeof value.then === 'function') {\n    // This is a wakeable.\n    var wakeable = value;\n\n    if ((sourceFiber.mode & BlockingMode) === NoMode) {\n      // Reset the memoizedState to what it was before we attempted\n      // to render it.\n      var currentSource = sourceFiber.alternate;\n\n      if (currentSource) {\n        sourceFiber.updateQueue = currentSource.updateQueue;\n        sourceFiber.memoizedState = currentSource.memoizedState;\n        sourceFiber.lanes = currentSource.lanes;\n      } else {\n        sourceFiber.updateQueue = null;\n        sourceFiber.memoizedState = null;\n      }\n    }\n\n    var hasInvisibleParentBoundary = hasSuspenseContext(suspenseStackCursor.current, InvisibleParentSuspenseContext); // Schedule the nearest Suspense to re-render the timed out view.\n\n    var _workInProgress = returnFiber;\n\n    do {\n      if (_workInProgress.tag === SuspenseComponent && shouldCaptureSuspense(_workInProgress, hasInvisibleParentBoundary)) {\n        // Found the nearest boundary.\n        // Stash the promise on the boundary fiber. If the boundary times out, we'll\n        // attach another listener to flip the boundary back to its normal state.\n        var wakeables = _workInProgress.updateQueue;\n\n        if (wakeables === null) {\n          var updateQueue = new Set();\n          updateQueue.add(wakeable);\n          _workInProgress.updateQueue = updateQueue;\n        } else {\n          wakeables.add(wakeable);\n        } // If the boundary is outside of blocking mode, we should *not*\n        // suspend the commit. Pretend as if the suspended component rendered\n        // null and keep rendering. In the commit phase, we'll schedule a\n        // subsequent synchronous update to re-render the Suspense.\n        //\n        // Note: It doesn't matter whether the component that suspended was\n        // inside a blocking mode tree. If the Suspense is outside of it, we\n        // should *not* suspend the commit.\n\n\n        if ((_workInProgress.mode & BlockingMode) === NoMode) {\n          _workInProgress.flags |= DidCapture;\n          sourceFiber.flags |= ForceUpdateForLegacySuspense; // We're going to commit this fiber even though it didn't complete.\n          // But we shouldn't call any lifecycle methods or callbacks. Remove\n          // all lifecycle effect tags.\n\n          sourceFiber.flags &= ~(LifecycleEffectMask | Incomplete);\n\n          if (sourceFiber.tag === ClassComponent) {\n            var currentSourceFiber = sourceFiber.alternate;\n\n            if (currentSourceFiber === null) {\n              // This is a new mount. Change the tag so it's not mistaken for a\n              // completed class component. For example, we should not call\n              // componentWillUnmount if it is deleted.\n              sourceFiber.tag = IncompleteClassComponent;\n            } else {\n              // When we try rendering again, we should not reuse the current fiber,\n              // since it's known to be in an inconsistent state. Use a force update to\n              // prevent a bail out.\n              var update = createUpdate(NoTimestamp, SyncLane);\n              update.tag = ForceUpdate;\n              enqueueUpdate(sourceFiber, update);\n            }\n          } // The source fiber did not complete. Mark it with Sync priority to\n          // indicate that it still has pending work.\n\n\n          sourceFiber.lanes = mergeLanes(sourceFiber.lanes, SyncLane); // Exit without suspending.\n\n          return;\n        } // Confirmed that the boundary is in a concurrent mode tree. Continue\n        // with the normal suspend path.\n        //\n        // After this we'll use a set of heuristics to determine whether this\n        // render pass will run to completion or restart or \"suspend\" the commit.\n        // The actual logic for this is spread out in different places.\n        //\n        // This first principle is that if we're going to suspend when we complete\n        // a root, then we should also restart if we get an update or ping that\n        // might unsuspend it, and vice versa. The only reason to suspend is\n        // because you think you might want to restart before committing. However,\n        // it doesn't make sense to restart only while in the period we're suspended.\n        //\n        // Restarting too aggressively is also not good because it starves out any\n        // intermediate loading state. So we use heuristics to determine when.\n        // Suspense Heuristics\n        //\n        // If nothing threw a Promise or all the same fallbacks are already showing,\n        // then don't suspend/restart.\n        //\n        // If this is an initial render of a new tree of Suspense boundaries and\n        // those trigger a fallback, then don't suspend/restart. We want to ensure\n        // that we can show the initial loading state as quickly as possible.\n        //\n        // If we hit a \"Delayed\" case, such as when we'd switch from content back into\n        // a fallback, then we should always suspend/restart. Transitions apply\n        // to this case. If none is defined, JND is used instead.\n        //\n        // If we're already showing a fallback and it gets \"retried\", allowing us to show\n        // another level, but there's still an inner boundary that would show a fallback,\n        // then we suspend/restart for 500ms since the last time we showed a fallback\n        // anywhere in the tree. This effectively throttles progressive loading into a\n        // consistent train of commits. This also gives us an opportunity to restart to\n        // get to the completed state slightly earlier.\n        //\n        // If there's ambiguity due to batching it's resolved in preference of:\n        // 1) \"delayed\", 2) \"initial render\", 3) \"retry\".\n        //\n        // We want to ensure that a \"busy\" state doesn't get force committed. We want to\n        // ensure that new initial loading states can commit as soon as possible.\n\n\n        attachPingListener(root, wakeable, rootRenderLanes);\n        _workInProgress.flags |= ShouldCapture;\n        _workInProgress.lanes = rootRenderLanes;\n        return;\n      } // This boundary already captured during this render. Continue to the next\n      // boundary.\n\n\n      _workInProgress = _workInProgress.return;\n    } while (_workInProgress !== null); // No boundary was found. Fallthrough to error mode.\n    // TODO: Use invariant so the message is stripped in prod?\n\n\n    value = new Error((getComponentName(sourceFiber.type) || 'A React component') + ' suspended while rendering, but no fallback UI was specified.\\n' + '\\n' + 'Add a <Suspense fallback=...> component higher in the tree to ' + 'provide a loading indicator or placeholder to display.');\n  } // We didn't find a boundary that could handle this type of exception. Start\n  // over and traverse parent path again, this time treating the exception\n  // as an error.\n\n\n  renderDidError();\n  value = createCapturedValue(value, sourceFiber);\n  var workInProgress = returnFiber;\n\n  do {\n    switch (workInProgress.tag) {\n      case HostRoot:\n        {\n          var _errorInfo = value;\n          workInProgress.flags |= ShouldCapture;\n          var lane = pickArbitraryLane(rootRenderLanes);\n          workInProgress.lanes = mergeLanes(workInProgress.lanes, lane);\n\n          var _update = createRootErrorUpdate(workInProgress, _errorInfo, lane);\n\n          enqueueCapturedUpdate(workInProgress, _update);\n          return;\n        }\n\n      case ClassComponent:\n        // Capture and retry\n        var errorInfo = value;\n        var ctor = workInProgress.type;\n        var instance = workInProgress.stateNode;\n\n        if ((workInProgress.flags & DidCapture) === NoFlags && (typeof ctor.getDerivedStateFromError === 'function' || instance !== null && typeof instance.componentDidCatch === 'function' && !isAlreadyFailedLegacyErrorBoundary(instance))) {\n          workInProgress.flags |= ShouldCapture;\n\n          var _lane = pickArbitraryLane(rootRenderLanes);\n\n          workInProgress.lanes = mergeLanes(workInProgress.lanes, _lane); // Schedule the error boundary to re-render using updated state\n\n          var _update2 = createClassErrorUpdate(workInProgress, errorInfo, _lane);\n\n          enqueueCapturedUpdate(workInProgress, _update2);\n          return;\n        }\n\n        break;\n    }\n\n    workInProgress = workInProgress.return;\n  } while (workInProgress !== null);\n}\n\nvar didWarnAboutUndefinedSnapshotBeforeUpdate = null;\n\n{\n  didWarnAboutUndefinedSnapshotBeforeUpdate = new Set();\n}\n\nvar PossiblyWeakSet = typeof WeakSet === 'function' ? WeakSet : Set;\n\nvar callComponentWillUnmountWithTimer = function (current, instance) {\n  instance.props = current.memoizedProps;\n  instance.state = current.memoizedState;\n\n  {\n    instance.componentWillUnmount();\n  }\n}; // Capture errors so they don't interrupt unmounting.\n\n\nfunction safelyCallComponentWillUnmount(current, instance) {\n  {\n    invokeGuardedCallback(null, callComponentWillUnmountWithTimer, null, current, instance);\n\n    if (hasCaughtError()) {\n      var unmountError = clearCaughtError();\n      captureCommitPhaseError(current, unmountError);\n    }\n  }\n}\n\nfunction safelyDetachRef(current) {\n  var ref = current.ref;\n\n  if (ref !== null) {\n    if (typeof ref === 'function') {\n      {\n        invokeGuardedCallback(null, ref, null, null);\n\n        if (hasCaughtError()) {\n          var refError = clearCaughtError();\n          captureCommitPhaseError(current, refError);\n        }\n      }\n    } else {\n      ref.current = null;\n    }\n  }\n}\n\nfunction safelyCallDestroy(current, destroy) {\n  {\n    invokeGuardedCallback(null, destroy, null);\n\n    if (hasCaughtError()) {\n      var error = clearCaughtError();\n      captureCommitPhaseError(current, error);\n    }\n  }\n}\n\nfunction commitBeforeMutationLifeCycles(current, finishedWork) {\n  switch (finishedWork.tag) {\n    case FunctionComponent:\n    case ForwardRef:\n    case SimpleMemoComponent:\n    case Block:\n      {\n        return;\n      }\n\n    case ClassComponent:\n      {\n        if (finishedWork.flags & Snapshot) {\n          if (current !== null) {\n            var prevProps = current.memoizedProps;\n            var prevState = current.memoizedState;\n            var instance = finishedWork.stateNode; // We could update instance props and state here,\n            // but instead we rely on them being set during last render.\n            // TODO: revisit this when we implement resuming.\n\n            {\n              if (finishedWork.type === finishedWork.elementType && !didWarnAboutReassigningProps) {\n                if (instance.props !== finishedWork.memoizedProps) {\n                  error('Expected %s props to match memoized props before ' + 'getSnapshotBeforeUpdate. ' + 'This might either be because of a bug in React, or because ' + 'a component reassigns its own `this.props`. ' + 'Please file an issue.', getComponentName(finishedWork.type) || 'instance');\n                }\n\n                if (instance.state !== finishedWork.memoizedState) {\n                  error('Expected %s state to match memoized state before ' + 'getSnapshotBeforeUpdate. ' + 'This might either be because of a bug in React, or because ' + 'a component reassigns its own `this.state`. ' + 'Please file an issue.', getComponentName(finishedWork.type) || 'instance');\n                }\n              }\n            }\n\n            var snapshot = instance.getSnapshotBeforeUpdate(finishedWork.elementType === finishedWork.type ? prevProps : resolveDefaultProps(finishedWork.type, prevProps), prevState);\n\n            {\n              var didWarnSet = didWarnAboutUndefinedSnapshotBeforeUpdate;\n\n              if (snapshot === undefined && !didWarnSet.has(finishedWork.type)) {\n                didWarnSet.add(finishedWork.type);\n\n                error('%s.getSnapshotBeforeUpdate(): A snapshot value (or null) ' + 'must be returned. You have returned undefined.', getComponentName(finishedWork.type));\n              }\n            }\n\n            instance.__reactInternalSnapshotBeforeUpdate = snapshot;\n          }\n        }\n\n        return;\n      }\n\n    case HostRoot:\n      {\n        {\n          if (finishedWork.flags & Snapshot) {\n            var root = finishedWork.stateNode;\n            clearContainer(root.containerInfo);\n          }\n        }\n\n        return;\n      }\n\n    case HostComponent:\n    case HostText:\n    case HostPortal:\n    case IncompleteClassComponent:\n      // Nothing to do for these component types\n      return;\n  }\n\n  {\n    {\n      throw Error( \"This unit of work tag should not have side-effects. This error is likely caused by a bug in React. Please file an issue.\" );\n    }\n  }\n}\n\nfunction commitHookEffectListUnmount(tag, finishedWork) {\n  var updateQueue = finishedWork.updateQueue;\n  var lastEffect = updateQueue !== null ? updateQueue.lastEffect : null;\n\n  if (lastEffect !== null) {\n    var firstEffect = lastEffect.next;\n    var effect = firstEffect;\n\n    do {\n      if ((effect.tag & tag) === tag) {\n        // Unmount\n        var destroy = effect.destroy;\n        effect.destroy = undefined;\n\n        if (destroy !== undefined) {\n          destroy();\n        }\n      }\n\n      effect = effect.next;\n    } while (effect !== firstEffect);\n  }\n}\n\nfunction commitHookEffectListMount(tag, finishedWork) {\n  var updateQueue = finishedWork.updateQueue;\n  var lastEffect = updateQueue !== null ? updateQueue.lastEffect : null;\n\n  if (lastEffect !== null) {\n    var firstEffect = lastEffect.next;\n    var effect = firstEffect;\n\n    do {\n      if ((effect.tag & tag) === tag) {\n        // Mount\n        var create = effect.create;\n        effect.destroy = create();\n\n        {\n          var destroy = effect.destroy;\n\n          if (destroy !== undefined && typeof destroy !== 'function') {\n            var addendum = void 0;\n\n            if (destroy === null) {\n              addendum = ' You returned null. If your effect does not require clean ' + 'up, return undefined (or nothing).';\n            } else if (typeof destroy.then === 'function') {\n              addendum = '\\n\\nIt looks like you wrote useEffect(async () => ...) or returned a Promise. ' + 'Instead, write the async function inside your effect ' + 'and call it immediately:\\n\\n' + 'useEffect(() => {\\n' + '  async function fetchData() {\\n' + '    // You can await here\\n' + '    const response = await MyAPI.getData(someId);\\n' + '    // ...\\n' + '  }\\n' + '  fetchData();\\n' + \"}, [someId]); // Or [] if effect doesn't need props or state\\n\\n\" + 'Learn more about data fetching with Hooks: https://reactjs.org/link/hooks-data-fetching';\n            } else {\n              addendum = ' You returned: ' + destroy;\n            }\n\n            error('An effect function must not return anything besides a function, ' + 'which is used for clean-up.%s', addendum);\n          }\n        }\n      }\n\n      effect = effect.next;\n    } while (effect !== firstEffect);\n  }\n}\n\nfunction schedulePassiveEffects(finishedWork) {\n  var updateQueue = finishedWork.updateQueue;\n  var lastEffect = updateQueue !== null ? updateQueue.lastEffect : null;\n\n  if (lastEffect !== null) {\n    var firstEffect = lastEffect.next;\n    var effect = firstEffect;\n\n    do {\n      var _effect = effect,\n          next = _effect.next,\n          tag = _effect.tag;\n\n      if ((tag & Passive$1) !== NoFlags$1 && (tag & HasEffect) !== NoFlags$1) {\n        enqueuePendingPassiveHookEffectUnmount(finishedWork, effect);\n        enqueuePendingPassiveHookEffectMount(finishedWork, effect);\n      }\n\n      effect = next;\n    } while (effect !== firstEffect);\n  }\n}\n\nfunction commitLifeCycles(finishedRoot, current, finishedWork, committedLanes) {\n  switch (finishedWork.tag) {\n    case FunctionComponent:\n    case ForwardRef:\n    case SimpleMemoComponent:\n    case Block:\n      {\n        // At this point layout effects have already been destroyed (during mutation phase).\n        // This is done to prevent sibling component effects from interfering with each other,\n        // e.g. a destroy function in one component should never override a ref set\n        // by a create function in another component during the same commit.\n        {\n          commitHookEffectListMount(Layout | HasEffect, finishedWork);\n        }\n\n        schedulePassiveEffects(finishedWork);\n        return;\n      }\n\n    case ClassComponent:\n      {\n        var instance = finishedWork.stateNode;\n\n        if (finishedWork.flags & Update) {\n          if (current === null) {\n            // We could update instance props and state here,\n            // but instead we rely on them being set during last render.\n            // TODO: revisit this when we implement resuming.\n            {\n              if (finishedWork.type === finishedWork.elementType && !didWarnAboutReassigningProps) {\n                if (instance.props !== finishedWork.memoizedProps) {\n                  error('Expected %s props to match memoized props before ' + 'componentDidMount. ' + 'This might either be because of a bug in React, or because ' + 'a component reassigns its own `this.props`. ' + 'Please file an issue.', getComponentName(finishedWork.type) || 'instance');\n                }\n\n                if (instance.state !== finishedWork.memoizedState) {\n                  error('Expected %s state to match memoized state before ' + 'componentDidMount. ' + 'This might either be because of a bug in React, or because ' + 'a component reassigns its own `this.state`. ' + 'Please file an issue.', getComponentName(finishedWork.type) || 'instance');\n                }\n              }\n            }\n\n            {\n              instance.componentDidMount();\n            }\n          } else {\n            var prevProps = finishedWork.elementType === finishedWork.type ? current.memoizedProps : resolveDefaultProps(finishedWork.type, current.memoizedProps);\n            var prevState = current.memoizedState; // We could update instance props and state here,\n            // but instead we rely on them being set during last render.\n            // TODO: revisit this when we implement resuming.\n\n            {\n              if (finishedWork.type === finishedWork.elementType && !didWarnAboutReassigningProps) {\n                if (instance.props !== finishedWork.memoizedProps) {\n                  error('Expected %s props to match memoized props before ' + 'componentDidUpdate. ' + 'This might either be because of a bug in React, or because ' + 'a component reassigns its own `this.props`. ' + 'Please file an issue.', getComponentName(finishedWork.type) || 'instance');\n                }\n\n                if (instance.state !== finishedWork.memoizedState) {\n                  error('Expected %s state to match memoized state before ' + 'componentDidUpdate. ' + 'This might either be because of a bug in React, or because ' + 'a component reassigns its own `this.state`. ' + 'Please file an issue.', getComponentName(finishedWork.type) || 'instance');\n                }\n              }\n            }\n\n            {\n              instance.componentDidUpdate(prevProps, prevState, instance.__reactInternalSnapshotBeforeUpdate);\n            }\n          }\n        } // TODO: I think this is now always non-null by the time it reaches the\n        // commit phase. Consider removing the type check.\n\n\n        var updateQueue = finishedWork.updateQueue;\n\n        if (updateQueue !== null) {\n          {\n            if (finishedWork.type === finishedWork.elementType && !didWarnAboutReassigningProps) {\n              if (instance.props !== finishedWork.memoizedProps) {\n                error('Expected %s props to match memoized props before ' + 'processing the update queue. ' + 'This might either be because of a bug in React, or because ' + 'a component reassigns its own `this.props`. ' + 'Please file an issue.', getComponentName(finishedWork.type) || 'instance');\n              }\n\n              if (instance.state !== finishedWork.memoizedState) {\n                error('Expected %s state to match memoized state before ' + 'processing the update queue. ' + 'This might either be because of a bug in React, or because ' + 'a component reassigns its own `this.state`. ' + 'Please file an issue.', getComponentName(finishedWork.type) || 'instance');\n              }\n            }\n          } // We could update instance props and state here,\n          // but instead we rely on them being set during last render.\n          // TODO: revisit this when we implement resuming.\n\n\n          commitUpdateQueue(finishedWork, updateQueue, instance);\n        }\n\n        return;\n      }\n\n    case HostRoot:\n      {\n        // TODO: I think this is now always non-null by the time it reaches the\n        // commit phase. Consider removing the type check.\n        var _updateQueue = finishedWork.updateQueue;\n\n        if (_updateQueue !== null) {\n          var _instance = null;\n\n          if (finishedWork.child !== null) {\n            switch (finishedWork.child.tag) {\n              case HostComponent:\n                _instance = getPublicInstance(finishedWork.child.stateNode);\n                break;\n\n              case ClassComponent:\n                _instance = finishedWork.child.stateNode;\n                break;\n            }\n          }\n\n          commitUpdateQueue(finishedWork, _updateQueue, _instance);\n        }\n\n        return;\n      }\n\n    case HostComponent:\n      {\n        var _instance2 = finishedWork.stateNode; // Renderers may schedule work to be done after host components are mounted\n        // (eg DOM renderer may schedule auto-focus for inputs and form controls).\n        // These effects should only be committed when components are first mounted,\n        // aka when there is no current/alternate.\n\n        if (current === null && finishedWork.flags & Update) {\n          var type = finishedWork.type;\n          var props = finishedWork.memoizedProps;\n          commitMount(_instance2, type, props);\n        }\n\n        return;\n      }\n\n    case HostText:\n      {\n        // We have no life-cycles associated with text.\n        return;\n      }\n\n    case HostPortal:\n      {\n        // We have no life-cycles associated with portals.\n        return;\n      }\n\n    case Profiler:\n      {\n        {\n          var _finishedWork$memoize2 = finishedWork.memoizedProps,\n              onCommit = _finishedWork$memoize2.onCommit,\n              onRender = _finishedWork$memoize2.onRender;\n          var effectDuration = finishedWork.stateNode.effectDuration;\n          var commitTime = getCommitTime();\n\n          if (typeof onRender === 'function') {\n            {\n              onRender(finishedWork.memoizedProps.id, current === null ? 'mount' : 'update', finishedWork.actualDuration, finishedWork.treeBaseDuration, finishedWork.actualStartTime, commitTime, finishedRoot.memoizedInteractions);\n            }\n          }\n        }\n\n        return;\n      }\n\n    case SuspenseComponent:\n      {\n        commitSuspenseHydrationCallbacks(finishedRoot, finishedWork);\n        return;\n      }\n\n    case SuspenseListComponent:\n    case IncompleteClassComponent:\n    case FundamentalComponent:\n    case ScopeComponent:\n    case OffscreenComponent:\n    case LegacyHiddenComponent:\n      return;\n  }\n\n  {\n    {\n      throw Error( \"This unit of work tag should not have side-effects. This error is likely caused by a bug in React. Please file an issue.\" );\n    }\n  }\n}\n\nfunction hideOrUnhideAllChildren(finishedWork, isHidden) {\n  {\n    // We only have the top Fiber that was inserted but we need to recurse down its\n    // children to find all the terminal nodes.\n    var node = finishedWork;\n\n    while (true) {\n      if (node.tag === HostComponent) {\n        var instance = node.stateNode;\n\n        if (isHidden) {\n          hideInstance(instance);\n        } else {\n          unhideInstance(node.stateNode, node.memoizedProps);\n        }\n      } else if (node.tag === HostText) {\n        var _instance3 = node.stateNode;\n\n        if (isHidden) {\n          hideTextInstance(_instance3);\n        } else {\n          unhideTextInstance(_instance3, node.memoizedProps);\n        }\n      } else if ((node.tag === OffscreenComponent || node.tag === LegacyHiddenComponent) && node.memoizedState !== null && node !== finishedWork) ; else if (node.child !== null) {\n        node.child.return = node;\n        node = node.child;\n        continue;\n      }\n\n      if (node === finishedWork) {\n        return;\n      }\n\n      while (node.sibling === null) {\n        if (node.return === null || node.return === finishedWork) {\n          return;\n        }\n\n        node = node.return;\n      }\n\n      node.sibling.return = node.return;\n      node = node.sibling;\n    }\n  }\n}\n\nfunction commitAttachRef(finishedWork) {\n  var ref = finishedWork.ref;\n\n  if (ref !== null) {\n    var instance = finishedWork.stateNode;\n    var instanceToUse;\n\n    switch (finishedWork.tag) {\n      case HostComponent:\n        instanceToUse = getPublicInstance(instance);\n        break;\n\n      default:\n        instanceToUse = instance;\n    } // Moved outside to ensure DCE works with this flag\n\n    if (typeof ref === 'function') {\n      ref(instanceToUse);\n    } else {\n      {\n        if (!ref.hasOwnProperty('current')) {\n          error('Unexpected ref object provided for %s. ' + 'Use either a ref-setter function or React.createRef().', getComponentName(finishedWork.type));\n        }\n      }\n\n      ref.current = instanceToUse;\n    }\n  }\n}\n\nfunction commitDetachRef(current) {\n  var currentRef = current.ref;\n\n  if (currentRef !== null) {\n    if (typeof currentRef === 'function') {\n      currentRef(null);\n    } else {\n      currentRef.current = null;\n    }\n  }\n} // User-originating errors (lifecycles and refs) should not interrupt\n// deletion, so don't let them throw. Host-originating errors should\n// interrupt deletion, so it's okay\n\n\nfunction commitUnmount(finishedRoot, current, renderPriorityLevel) {\n  onCommitUnmount(current);\n\n  switch (current.tag) {\n    case FunctionComponent:\n    case ForwardRef:\n    case MemoComponent:\n    case SimpleMemoComponent:\n    case Block:\n      {\n        var updateQueue = current.updateQueue;\n\n        if (updateQueue !== null) {\n          var lastEffect = updateQueue.lastEffect;\n\n          if (lastEffect !== null) {\n            var firstEffect = lastEffect.next;\n            var effect = firstEffect;\n\n            do {\n              var _effect2 = effect,\n                  destroy = _effect2.destroy,\n                  tag = _effect2.tag;\n\n              if (destroy !== undefined) {\n                if ((tag & Passive$1) !== NoFlags$1) {\n                  enqueuePendingPassiveHookEffectUnmount(current, effect);\n                } else {\n                  {\n                    safelyCallDestroy(current, destroy);\n                  }\n                }\n              }\n\n              effect = effect.next;\n            } while (effect !== firstEffect);\n          }\n        }\n\n        return;\n      }\n\n    case ClassComponent:\n      {\n        safelyDetachRef(current);\n        var instance = current.stateNode;\n\n        if (typeof instance.componentWillUnmount === 'function') {\n          safelyCallComponentWillUnmount(current, instance);\n        }\n\n        return;\n      }\n\n    case HostComponent:\n      {\n        safelyDetachRef(current);\n        return;\n      }\n\n    case HostPortal:\n      {\n        // TODO: this is recursive.\n        // We are also not using this parent because\n        // the portal will get pushed immediately.\n        {\n          unmountHostComponents(finishedRoot, current);\n        }\n\n        return;\n      }\n\n    case FundamentalComponent:\n      {\n\n        return;\n      }\n\n    case DehydratedFragment:\n      {\n\n        return;\n      }\n\n    case ScopeComponent:\n      {\n\n        return;\n      }\n  }\n}\n\nfunction commitNestedUnmounts(finishedRoot, root, renderPriorityLevel) {\n  // While we're inside a removed host node we don't want to call\n  // removeChild on the inner nodes because they're removed by the top\n  // call anyway. We also want to call componentWillUnmount on all\n  // composites before this host node is removed from the tree. Therefore\n  // we do an inner loop while we're still inside the host node.\n  var node = root;\n\n  while (true) {\n    commitUnmount(finishedRoot, node); // Visit children because they may contain more composite or host nodes.\n    // Skip portals because commitUnmount() currently visits them recursively.\n\n    if (node.child !== null && ( // If we use mutation we drill down into portals using commitUnmount above.\n    // If we don't use mutation we drill down into portals here instead.\n     node.tag !== HostPortal)) {\n      node.child.return = node;\n      node = node.child;\n      continue;\n    }\n\n    if (node === root) {\n      return;\n    }\n\n    while (node.sibling === null) {\n      if (node.return === null || node.return === root) {\n        return;\n      }\n\n      node = node.return;\n    }\n\n    node.sibling.return = node.return;\n    node = node.sibling;\n  }\n}\n\nfunction detachFiberMutation(fiber) {\n  // Cut off the return pointers to disconnect it from the tree. Ideally, we\n  // should clear the child pointer of the parent alternate to let this\n  // get GC:ed but we don't know which for sure which parent is the current\n  // one so we'll settle for GC:ing the subtree of this child. This child\n  // itself will be GC:ed when the parent updates the next time.\n  // Note: we cannot null out sibling here, otherwise it can cause issues\n  // with findDOMNode and how it requires the sibling field to carry out\n  // traversal in a later effect. See PR #16820. We now clear the sibling\n  // field after effects, see: detachFiberAfterEffects.\n  //\n  // Don't disconnect stateNode now; it will be detached in detachFiberAfterEffects.\n  // It may be required if the current component is an error boundary,\n  // and one of its descendants throws while unmounting a passive effect.\n  fiber.alternate = null;\n  fiber.child = null;\n  fiber.dependencies = null;\n  fiber.firstEffect = null;\n  fiber.lastEffect = null;\n  fiber.memoizedProps = null;\n  fiber.memoizedState = null;\n  fiber.pendingProps = null;\n  fiber.return = null;\n  fiber.updateQueue = null;\n\n  {\n    fiber._debugOwner = null;\n  }\n}\n\nfunction getHostParentFiber(fiber) {\n  var parent = fiber.return;\n\n  while (parent !== null) {\n    if (isHostParent(parent)) {\n      return parent;\n    }\n\n    parent = parent.return;\n  }\n\n  {\n    {\n      throw Error( \"Expected to find a host parent. This error is likely caused by a bug in React. Please file an issue.\" );\n    }\n  }\n}\n\nfunction isHostParent(fiber) {\n  return fiber.tag === HostComponent || fiber.tag === HostRoot || fiber.tag === HostPortal;\n}\n\nfunction getHostSibling(fiber) {\n  // We're going to search forward into the tree until we find a sibling host\n  // node. Unfortunately, if multiple insertions are done in a row we have to\n  // search past them. This leads to exponential search for the next sibling.\n  // TODO: Find a more efficient way to do this.\n  var node = fiber;\n\n  siblings: while (true) {\n    // If we didn't find anything, let's try the next sibling.\n    while (node.sibling === null) {\n      if (node.return === null || isHostParent(node.return)) {\n        // If we pop out of the root or hit the parent the fiber we are the\n        // last sibling.\n        return null;\n      }\n\n      node = node.return;\n    }\n\n    node.sibling.return = node.return;\n    node = node.sibling;\n\n    while (node.tag !== HostComponent && node.tag !== HostText && node.tag !== DehydratedFragment) {\n      // If it is not host node and, we might have a host node inside it.\n      // Try to search down until we find one.\n      if (node.flags & Placement) {\n        // If we don't have a child, try the siblings instead.\n        continue siblings;\n      } // If we don't have a child, try the siblings instead.\n      // We also skip portals because they are not part of this host tree.\n\n\n      if (node.child === null || node.tag === HostPortal) {\n        continue siblings;\n      } else {\n        node.child.return = node;\n        node = node.child;\n      }\n    } // Check if this host node is stable or about to be placed.\n\n\n    if (!(node.flags & Placement)) {\n      // Found it!\n      return node.stateNode;\n    }\n  }\n}\n\nfunction commitPlacement(finishedWork) {\n\n\n  var parentFiber = getHostParentFiber(finishedWork); // Note: these two variables *must* always be updated together.\n\n  var parent;\n  var isContainer;\n  var parentStateNode = parentFiber.stateNode;\n\n  switch (parentFiber.tag) {\n    case HostComponent:\n      parent = parentStateNode;\n      isContainer = false;\n      break;\n\n    case HostRoot:\n      parent = parentStateNode.containerInfo;\n      isContainer = true;\n      break;\n\n    case HostPortal:\n      parent = parentStateNode.containerInfo;\n      isContainer = true;\n      break;\n\n    case FundamentalComponent:\n\n    // eslint-disable-next-line-no-fallthrough\n\n    default:\n      {\n        {\n          throw Error( \"Invalid host parent fiber. This error is likely caused by a bug in React. Please file an issue.\" );\n        }\n      }\n\n  }\n\n  if (parentFiber.flags & ContentReset) {\n    // Reset the text content of the parent before doing any insertions\n    resetTextContent(parent); // Clear ContentReset from the effect tag\n\n    parentFiber.flags &= ~ContentReset;\n  }\n\n  var before = getHostSibling(finishedWork); // We only have the top Fiber that was inserted but we need to recurse down its\n  // children to find all the terminal nodes.\n\n  if (isContainer) {\n    insertOrAppendPlacementNodeIntoContainer(finishedWork, before, parent);\n  } else {\n    insertOrAppendPlacementNode(finishedWork, before, parent);\n  }\n}\n\nfunction insertOrAppendPlacementNodeIntoContainer(node, before, parent) {\n  var tag = node.tag;\n  var isHost = tag === HostComponent || tag === HostText;\n\n  if (isHost || enableFundamentalAPI ) {\n    var stateNode = isHost ? node.stateNode : node.stateNode.instance;\n\n    if (before) {\n      insertInContainerBefore(parent, stateNode, before);\n    } else {\n      appendChildToContainer(parent, stateNode);\n    }\n  } else if (tag === HostPortal) ; else {\n    var child = node.child;\n\n    if (child !== null) {\n      insertOrAppendPlacementNodeIntoContainer(child, before, parent);\n      var sibling = child.sibling;\n\n      while (sibling !== null) {\n        insertOrAppendPlacementNodeIntoContainer(sibling, before, parent);\n        sibling = sibling.sibling;\n      }\n    }\n  }\n}\n\nfunction insertOrAppendPlacementNode(node, before, parent) {\n  var tag = node.tag;\n  var isHost = tag === HostComponent || tag === HostText;\n\n  if (isHost || enableFundamentalAPI ) {\n    var stateNode = isHost ? node.stateNode : node.stateNode.instance;\n\n    if (before) {\n      insertBefore(parent, stateNode, before);\n    } else {\n      appendChild(parent, stateNode);\n    }\n  } else if (tag === HostPortal) ; else {\n    var child = node.child;\n\n    if (child !== null) {\n      insertOrAppendPlacementNode(child, before, parent);\n      var sibling = child.sibling;\n\n      while (sibling !== null) {\n        insertOrAppendPlacementNode(sibling, before, parent);\n        sibling = sibling.sibling;\n      }\n    }\n  }\n}\n\nfunction unmountHostComponents(finishedRoot, current, renderPriorityLevel) {\n  // We only have the top Fiber that was deleted but we need to recurse down its\n  // children to find all the terminal nodes.\n  var node = current; // Each iteration, currentParent is populated with node's host parent if not\n  // currentParentIsValid.\n\n  var currentParentIsValid = false; // Note: these two variables *must* always be updated together.\n\n  var currentParent;\n  var currentParentIsContainer;\n\n  while (true) {\n    if (!currentParentIsValid) {\n      var parent = node.return;\n\n      findParent: while (true) {\n        if (!(parent !== null)) {\n          {\n            throw Error( \"Expected to find a host parent. This error is likely caused by a bug in React. Please file an issue.\" );\n          }\n        }\n\n        var parentStateNode = parent.stateNode;\n\n        switch (parent.tag) {\n          case HostComponent:\n            currentParent = parentStateNode;\n            currentParentIsContainer = false;\n            break findParent;\n\n          case HostRoot:\n            currentParent = parentStateNode.containerInfo;\n            currentParentIsContainer = true;\n            break findParent;\n\n          case HostPortal:\n            currentParent = parentStateNode.containerInfo;\n            currentParentIsContainer = true;\n            break findParent;\n\n        }\n\n        parent = parent.return;\n      }\n\n      currentParentIsValid = true;\n    }\n\n    if (node.tag === HostComponent || node.tag === HostText) {\n      commitNestedUnmounts(finishedRoot, node); // After all the children have unmounted, it is now safe to remove the\n      // node from the tree.\n\n      if (currentParentIsContainer) {\n        removeChildFromContainer(currentParent, node.stateNode);\n      } else {\n        removeChild(currentParent, node.stateNode);\n      } // Don't visit children because we already visited them.\n\n    } else if (node.tag === HostPortal) {\n      if (node.child !== null) {\n        // When we go into a portal, it becomes the parent to remove from.\n        // We will reassign it back when we pop the portal on the way up.\n        currentParent = node.stateNode.containerInfo;\n        currentParentIsContainer = true; // Visit children because portals might contain host components.\n\n        node.child.return = node;\n        node = node.child;\n        continue;\n      }\n    } else {\n      commitUnmount(finishedRoot, node); // Visit children because we may find more host components below.\n\n      if (node.child !== null) {\n        node.child.return = node;\n        node = node.child;\n        continue;\n      }\n    }\n\n    if (node === current) {\n      return;\n    }\n\n    while (node.sibling === null) {\n      if (node.return === null || node.return === current) {\n        return;\n      }\n\n      node = node.return;\n\n      if (node.tag === HostPortal) {\n        // When we go out of the portal, we need to restore the parent.\n        // Since we don't keep a stack of them, we will search for it.\n        currentParentIsValid = false;\n      }\n    }\n\n    node.sibling.return = node.return;\n    node = node.sibling;\n  }\n}\n\nfunction commitDeletion(finishedRoot, current, renderPriorityLevel) {\n  {\n    // Recursively delete all host nodes from the parent.\n    // Detach refs and call componentWillUnmount() on the whole subtree.\n    unmountHostComponents(finishedRoot, current);\n  }\n\n  var alternate = current.alternate;\n  detachFiberMutation(current);\n\n  if (alternate !== null) {\n    detachFiberMutation(alternate);\n  }\n}\n\nfunction commitWork(current, finishedWork) {\n\n  switch (finishedWork.tag) {\n    case FunctionComponent:\n    case ForwardRef:\n    case MemoComponent:\n    case SimpleMemoComponent:\n    case Block:\n      {\n        // Layout effects are destroyed during the mutation phase so that all\n        // destroy functions for all fibers are called before any create functions.\n        // This prevents sibling component effects from interfering with each other,\n        // e.g. a destroy function in one component should never override a ref set\n        // by a create function in another component during the same commit.\n        {\n          commitHookEffectListUnmount(Layout | HasEffect, finishedWork);\n        }\n\n        return;\n      }\n\n    case ClassComponent:\n      {\n        return;\n      }\n\n    case HostComponent:\n      {\n        var instance = finishedWork.stateNode;\n\n        if (instance != null) {\n          // Commit the work prepared earlier.\n          var newProps = finishedWork.memoizedProps; // For hydration we reuse the update path but we treat the oldProps\n          // as the newProps. The updatePayload will contain the real change in\n          // this case.\n\n          var oldProps = current !== null ? current.memoizedProps : newProps;\n          var type = finishedWork.type; // TODO: Type the updateQueue to be specific to host components.\n\n          var updatePayload = finishedWork.updateQueue;\n          finishedWork.updateQueue = null;\n\n          if (updatePayload !== null) {\n            commitUpdate(instance, updatePayload, type, oldProps, newProps);\n          }\n        }\n\n        return;\n      }\n\n    case HostText:\n      {\n        if (!(finishedWork.stateNode !== null)) {\n          {\n            throw Error( \"This should have a text node initialized. This error is likely caused by a bug in React. Please file an issue.\" );\n          }\n        }\n\n        var textInstance = finishedWork.stateNode;\n        var newText = finishedWork.memoizedProps; // For hydration we reuse the update path but we treat the oldProps\n        // as the newProps. The updatePayload will contain the real change in\n        // this case.\n\n        var oldText = current !== null ? current.memoizedProps : newText;\n        commitTextUpdate(textInstance, oldText, newText);\n        return;\n      }\n\n    case HostRoot:\n      {\n        {\n          var _root = finishedWork.stateNode;\n\n          if (_root.hydrate) {\n            // We've just hydrated. No need to hydrate again.\n            _root.hydrate = false;\n            commitHydratedContainer(_root.containerInfo);\n          }\n        }\n\n        return;\n      }\n\n    case Profiler:\n      {\n        return;\n      }\n\n    case SuspenseComponent:\n      {\n        commitSuspenseComponent(finishedWork);\n        attachSuspenseRetryListeners(finishedWork);\n        return;\n      }\n\n    case SuspenseListComponent:\n      {\n        attachSuspenseRetryListeners(finishedWork);\n        return;\n      }\n\n    case IncompleteClassComponent:\n      {\n        return;\n      }\n\n    case FundamentalComponent:\n      {\n\n        break;\n      }\n\n    case ScopeComponent:\n      {\n\n        break;\n      }\n\n    case OffscreenComponent:\n    case LegacyHiddenComponent:\n      {\n        var newState = finishedWork.memoizedState;\n        var isHidden = newState !== null;\n        hideOrUnhideAllChildren(finishedWork, isHidden);\n        return;\n      }\n  }\n\n  {\n    {\n      throw Error( \"This unit of work tag should not have side-effects. This error is likely caused by a bug in React. Please file an issue.\" );\n    }\n  }\n}\n\nfunction commitSuspenseComponent(finishedWork) {\n  var newState = finishedWork.memoizedState;\n\n  if (newState !== null) {\n    markCommitTimeOfFallback();\n\n    {\n      // Hide the Offscreen component that contains the primary children. TODO:\n      // Ideally, this effect would have been scheduled on the Offscreen fiber\n      // itself. That's how unhiding works: the Offscreen component schedules an\n      // effect on itself. However, in this case, the component didn't complete,\n      // so the fiber was never added to the effect list in the normal path. We\n      // could have appended it to the effect list in the Suspense component's\n      // second pass, but doing it this way is less complicated. This would be\n      // simpler if we got rid of the effect list and traversed the tree, like\n      // we're planning to do.\n      var primaryChildParent = finishedWork.child;\n      hideOrUnhideAllChildren(primaryChildParent, true);\n    }\n  }\n}\n\nfunction commitSuspenseHydrationCallbacks(finishedRoot, finishedWork) {\n\n  var newState = finishedWork.memoizedState;\n\n  if (newState === null) {\n    var current = finishedWork.alternate;\n\n    if (current !== null) {\n      var prevState = current.memoizedState;\n\n      if (prevState !== null) {\n        var suspenseInstance = prevState.dehydrated;\n\n        if (suspenseInstance !== null) {\n          commitHydratedSuspenseInstance(suspenseInstance);\n        }\n      }\n    }\n  }\n}\n\nfunction attachSuspenseRetryListeners(finishedWork) {\n  // If this boundary just timed out, then it will have a set of wakeables.\n  // For each wakeable, attach a listener so that when it resolves, React\n  // attempts to re-render the boundary in the primary (pre-timeout) state.\n  var wakeables = finishedWork.updateQueue;\n\n  if (wakeables !== null) {\n    finishedWork.updateQueue = null;\n    var retryCache = finishedWork.stateNode;\n\n    if (retryCache === null) {\n      retryCache = finishedWork.stateNode = new PossiblyWeakSet();\n    }\n\n    wakeables.forEach(function (wakeable) {\n      // Memoize using the boundary fiber to prevent redundant listeners.\n      var retry = resolveRetryWakeable.bind(null, finishedWork, wakeable);\n\n      if (!retryCache.has(wakeable)) {\n        {\n          if (wakeable.__reactDoNotTraceInteractions !== true) {\n            retry = tracing.unstable_wrap(retry);\n          }\n        }\n\n        retryCache.add(wakeable);\n        wakeable.then(retry, retry);\n      }\n    });\n  }\n} // This function detects when a Suspense boundary goes from visible to hidden.\n// It returns false if the boundary is already hidden.\n// TODO: Use an effect tag.\n\n\nfunction isSuspenseBoundaryBeingHidden(current, finishedWork) {\n  if (current !== null) {\n    var oldState = current.memoizedState;\n\n    if (oldState === null || oldState.dehydrated !== null) {\n      var newState = finishedWork.memoizedState;\n      return newState !== null && newState.dehydrated === null;\n    }\n  }\n\n  return false;\n}\n\nfunction commitResetTextContent(current) {\n\n  resetTextContent(current.stateNode);\n}\n\nvar COMPONENT_TYPE = 0;\nvar HAS_PSEUDO_CLASS_TYPE = 1;\nvar ROLE_TYPE = 2;\nvar TEST_NAME_TYPE = 3;\nvar TEXT_TYPE = 4;\n\nif (typeof Symbol === 'function' && Symbol.for) {\n  var symbolFor$1 = Symbol.for;\n  COMPONENT_TYPE = symbolFor$1('selector.component');\n  HAS_PSEUDO_CLASS_TYPE = symbolFor$1('selector.has_pseudo_class');\n  ROLE_TYPE = symbolFor$1('selector.role');\n  TEST_NAME_TYPE = symbolFor$1('selector.test_id');\n  TEXT_TYPE = symbolFor$1('selector.text');\n}\nvar commitHooks = [];\nfunction onCommitRoot$1() {\n  {\n    commitHooks.forEach(function (commitHook) {\n      return commitHook();\n    });\n  }\n}\n\nvar ceil = Math.ceil;\nvar ReactCurrentDispatcher$2 = ReactSharedInternals.ReactCurrentDispatcher,\n    ReactCurrentOwner$2 = ReactSharedInternals.ReactCurrentOwner,\n    IsSomeRendererActing = ReactSharedInternals.IsSomeRendererActing;\nvar NoContext =\n/*             */\n0;\nvar BatchedContext =\n/*               */\n1;\nvar EventContext =\n/*                 */\n2;\nvar DiscreteEventContext =\n/*         */\n4;\nvar LegacyUnbatchedContext =\n/*       */\n8;\nvar RenderContext =\n/*                */\n16;\nvar CommitContext =\n/*                */\n32;\nvar RetryAfterError =\n/*       */\n64;\nvar RootIncomplete = 0;\nvar RootFatalErrored = 1;\nvar RootErrored = 2;\nvar RootSuspended = 3;\nvar RootSuspendedWithDelay = 4;\nvar RootCompleted = 5; // Describes where we are in the React execution stack\n\nvar executionContext = NoContext; // The root we're working on\n\nvar workInProgressRoot = null; // The fiber we're working on\n\nvar workInProgress = null; // The lanes we're rendering\n\nvar workInProgressRootRenderLanes = NoLanes; // Stack that allows components to change the render lanes for its subtree\n// This is a superset of the lanes we started working on at the root. The only\n// case where it's different from `workInProgressRootRenderLanes` is when we\n// enter a subtree that is hidden and needs to be unhidden: Suspense and\n// Offscreen component.\n//\n// Most things in the work loop should deal with workInProgressRootRenderLanes.\n// Most things in begin/complete phases should deal with subtreeRenderLanes.\n\nvar subtreeRenderLanes = NoLanes;\nvar subtreeRenderLanesCursor = createCursor(NoLanes); // Whether to root completed, errored, suspended, etc.\n\nvar workInProgressRootExitStatus = RootIncomplete; // A fatal error, if one is thrown\n\nvar workInProgressRootFatalError = null; // \"Included\" lanes refer to lanes that were worked on during this render. It's\n// slightly different than `renderLanes` because `renderLanes` can change as you\n// enter and exit an Offscreen tree. This value is the combination of all render\n// lanes for the entire render phase.\n\nvar workInProgressRootIncludedLanes = NoLanes; // The work left over by components that were visited during this render. Only\n// includes unprocessed updates, not work in bailed out children.\n\nvar workInProgressRootSkippedLanes = NoLanes; // Lanes that were updated (in an interleaved event) during this render.\n\nvar workInProgressRootUpdatedLanes = NoLanes; // Lanes that were pinged (in an interleaved event) during this render.\n\nvar workInProgressRootPingedLanes = NoLanes;\nvar mostRecentlyUpdatedRoot = null; // The most recent time we committed a fallback. This lets us ensure a train\n// model where we don't commit new loading states in too quick succession.\n\nvar globalMostRecentFallbackTime = 0;\nvar FALLBACK_THROTTLE_MS = 500; // The absolute time for when we should start giving up on rendering\n// more and prefer CPU suspense heuristics instead.\n\nvar workInProgressRootRenderTargetTime = Infinity; // How long a render is supposed to take before we start following CPU\n// suspense heuristics and opt out of rendering more content.\n\nvar RENDER_TIMEOUT_MS = 500;\n\nfunction resetRenderTimer() {\n  workInProgressRootRenderTargetTime = now() + RENDER_TIMEOUT_MS;\n}\n\nfunction getRenderTargetTime() {\n  return workInProgressRootRenderTargetTime;\n}\nvar nextEffect = null;\nvar hasUncaughtError = false;\nvar firstUncaughtError = null;\nvar legacyErrorBoundariesThatAlreadyFailed = null;\nvar rootDoesHavePassiveEffects = false;\nvar rootWithPendingPassiveEffects = null;\nvar pendingPassiveEffectsRenderPriority = NoPriority$1;\nvar pendingPassiveEffectsLanes = NoLanes;\nvar pendingPassiveHookEffectsMount = [];\nvar pendingPassiveHookEffectsUnmount = [];\nvar rootsWithPendingDiscreteUpdates = null; // Use these to prevent an infinite loop of nested updates\n\nvar NESTED_UPDATE_LIMIT = 50;\nvar nestedUpdateCount = 0;\nvar rootWithNestedUpdates = null;\nvar NESTED_PASSIVE_UPDATE_LIMIT = 50;\nvar nestedPassiveUpdateCount = 0; // Marks the need to reschedule pending interactions at these lanes\n// during the commit phase. This enables them to be traced across components\n// that spawn new work during render. E.g. hidden boundaries, suspended SSR\n// hydration or SuspenseList.\n// TODO: Can use a bitmask instead of an array\n\nvar spawnedWorkDuringRender = null; // If two updates are scheduled within the same event, we should treat their\n// event times as simultaneous, even if the actual clock time has advanced\n// between the first and second call.\n\nvar currentEventTime = NoTimestamp;\nvar currentEventWipLanes = NoLanes;\nvar currentEventPendingLanes = NoLanes; // Dev only flag that tracks if passive effects are currently being flushed.\n// We warn about state updates for unmounted components differently in this case.\n\nvar isFlushingPassiveEffects = false;\nvar focusedInstanceHandle = null;\nvar shouldFireAfterActiveInstanceBlur = false;\nfunction getWorkInProgressRoot() {\n  return workInProgressRoot;\n}\nfunction requestEventTime() {\n  if ((executionContext & (RenderContext | CommitContext)) !== NoContext) {\n    // We're inside React, so it's fine to read the actual time.\n    return now();\n  } // We're not inside React, so we may be in the middle of a browser event.\n\n\n  if (currentEventTime !== NoTimestamp) {\n    // Use the same start time for all updates until we enter React again.\n    return currentEventTime;\n  } // This is the first update since React yielded. Compute a new start time.\n\n\n  currentEventTime = now();\n  return currentEventTime;\n}\nfunction requestUpdateLane(fiber) {\n  // Special cases\n  var mode = fiber.mode;\n\n  if ((mode & BlockingMode) === NoMode) {\n    return SyncLane;\n  } else if ((mode & ConcurrentMode) === NoMode) {\n    return getCurrentPriorityLevel() === ImmediatePriority$1 ? SyncLane : SyncBatchedLane;\n  } // The algorithm for assigning an update to a lane should be stable for all\n  // updates at the same priority within the same event. To do this, the inputs\n  // to the algorithm must be the same. For example, we use the `renderLanes`\n  // to avoid choosing a lane that is already in the middle of rendering.\n  //\n  // However, the \"included\" lanes could be mutated in between updates in the\n  // same event, like if you perform an update inside `flushSync`. Or any other\n  // code path that might call `prepareFreshStack`.\n  //\n  // The trick we use is to cache the first of each of these inputs within an\n  // event. Then reset the cached values once we can be sure the event is over.\n  // Our heuristic for that is whenever we enter a concurrent work loop.\n  //\n  // We'll do the same for `currentEventPendingLanes` below.\n\n\n  if (currentEventWipLanes === NoLanes) {\n    currentEventWipLanes = workInProgressRootIncludedLanes;\n  }\n\n  var isTransition = requestCurrentTransition() !== NoTransition;\n\n  if (isTransition) {\n    if (currentEventPendingLanes !== NoLanes) {\n      currentEventPendingLanes = mostRecentlyUpdatedRoot !== null ? mostRecentlyUpdatedRoot.pendingLanes : NoLanes;\n    }\n\n    return findTransitionLane(currentEventWipLanes, currentEventPendingLanes);\n  } // TODO: Remove this dependency on the Scheduler priority.\n  // To do that, we're replacing it with an update lane priority.\n\n\n  var schedulerPriority = getCurrentPriorityLevel(); // The old behavior was using the priority level of the Scheduler.\n  // This couples React to the Scheduler internals, so we're replacing it\n  // with the currentUpdateLanePriority above. As an example of how this\n  // could be problematic, if we're not inside `Scheduler.runWithPriority`,\n  // then we'll get the priority of the current running Scheduler task,\n  // which is probably not what we want.\n\n  var lane;\n\n  if ( // TODO: Temporary. We're removing the concept of discrete updates.\n  (executionContext & DiscreteEventContext) !== NoContext && schedulerPriority === UserBlockingPriority$2) {\n    lane = findUpdateLane(InputDiscreteLanePriority, currentEventWipLanes);\n  } else {\n    var schedulerLanePriority = schedulerPriorityToLanePriority(schedulerPriority);\n\n    lane = findUpdateLane(schedulerLanePriority, currentEventWipLanes);\n  }\n\n  return lane;\n}\n\nfunction requestRetryLane(fiber) {\n  // This is a fork of `requestUpdateLane` designed specifically for Suspense\n  // \"retries\" — a special update that attempts to flip a Suspense boundary\n  // from its placeholder state to its primary/resolved state.\n  // Special cases\n  var mode = fiber.mode;\n\n  if ((mode & BlockingMode) === NoMode) {\n    return SyncLane;\n  } else if ((mode & ConcurrentMode) === NoMode) {\n    return getCurrentPriorityLevel() === ImmediatePriority$1 ? SyncLane : SyncBatchedLane;\n  } // See `requestUpdateLane` for explanation of `currentEventWipLanes`\n\n\n  if (currentEventWipLanes === NoLanes) {\n    currentEventWipLanes = workInProgressRootIncludedLanes;\n  }\n\n  return findRetryLane(currentEventWipLanes);\n}\n\nfunction scheduleUpdateOnFiber(fiber, lane, eventTime) {\n  checkForNestedUpdates();\n  warnAboutRenderPhaseUpdatesInDEV(fiber);\n  var root = markUpdateLaneFromFiberToRoot(fiber, lane);\n\n  if (root === null) {\n    warnAboutUpdateOnUnmountedFiberInDEV(fiber);\n    return null;\n  } // Mark that the root has a pending update.\n\n\n  markRootUpdated(root, lane, eventTime);\n\n  if (root === workInProgressRoot) {\n    // Received an update to a tree that's in the middle of rendering. Mark\n    // that there was an interleaved update work on this root. Unless the\n    // `deferRenderPhaseUpdateToNextBatch` flag is off and this is a render\n    // phase update. In that case, we don't treat render phase updates as if\n    // they were interleaved, for backwards compat reasons.\n    {\n      workInProgressRootUpdatedLanes = mergeLanes(workInProgressRootUpdatedLanes, lane);\n    }\n\n    if (workInProgressRootExitStatus === RootSuspendedWithDelay) {\n      // The root already suspended with a delay, which means this render\n      // definitely won't finish. Since we have a new update, let's mark it as\n      // suspended now, right before marking the incoming update. This has the\n      // effect of interrupting the current render and switching to the update.\n      // TODO: Make sure this doesn't override pings that happen while we've\n      // already started rendering.\n      markRootSuspended$1(root, workInProgressRootRenderLanes);\n    }\n  } // TODO: requestUpdateLanePriority also reads the priority. Pass the\n  // priority as an argument to that function and this one.\n\n\n  var priorityLevel = getCurrentPriorityLevel();\n\n  if (lane === SyncLane) {\n    if ( // Check if we're inside unbatchedUpdates\n    (executionContext & LegacyUnbatchedContext) !== NoContext && // Check if we're not already rendering\n    (executionContext & (RenderContext | CommitContext)) === NoContext) {\n      // Register pending interactions on the root to avoid losing traced interaction data.\n      schedulePendingInteractions(root, lane); // This is a legacy edge case. The initial mount of a ReactDOM.render-ed\n      // root inside of batchedUpdates should be synchronous, but layout updates\n      // should be deferred until the end of the batch.\n\n      performSyncWorkOnRoot(root);\n    } else {\n      ensureRootIsScheduled(root, eventTime);\n      schedulePendingInteractions(root, lane);\n\n      if (executionContext === NoContext) {\n        // Flush the synchronous work now, unless we're already working or inside\n        // a batch. This is intentionally inside scheduleUpdateOnFiber instead of\n        // scheduleCallbackForFiber to preserve the ability to schedule a callback\n        // without immediately flushing it. We only do this for user-initiated\n        // updates, to preserve historical behavior of legacy mode.\n        resetRenderTimer();\n        flushSyncCallbackQueue();\n      }\n    }\n  } else {\n    // Schedule a discrete update but only if it's not Sync.\n    if ((executionContext & DiscreteEventContext) !== NoContext && ( // Only updates at user-blocking priority or greater are considered\n    // discrete, even inside a discrete event.\n    priorityLevel === UserBlockingPriority$2 || priorityLevel === ImmediatePriority$1)) {\n      // This is the result of a discrete event. Track the lowest priority\n      // discrete update per root so we can flush them early, if needed.\n      if (rootsWithPendingDiscreteUpdates === null) {\n        rootsWithPendingDiscreteUpdates = new Set([root]);\n      } else {\n        rootsWithPendingDiscreteUpdates.add(root);\n      }\n    } // Schedule other updates after in case the callback is sync.\n\n\n    ensureRootIsScheduled(root, eventTime);\n    schedulePendingInteractions(root, lane);\n  } // We use this when assigning a lane for a transition inside\n  // `requestUpdateLane`. We assume it's the same as the root being updated,\n  // since in the common case of a single root app it probably is. If it's not\n  // the same root, then it's not a huge deal, we just might batch more stuff\n  // together more than necessary.\n\n\n  mostRecentlyUpdatedRoot = root;\n} // This is split into a separate function so we can mark a fiber with pending\n// work without treating it as a typical update that originates from an event;\n// e.g. retrying a Suspense boundary isn't an update, but it does schedule work\n// on a fiber.\n\nfunction markUpdateLaneFromFiberToRoot(sourceFiber, lane) {\n  // Update the source fiber's lanes\n  sourceFiber.lanes = mergeLanes(sourceFiber.lanes, lane);\n  var alternate = sourceFiber.alternate;\n\n  if (alternate !== null) {\n    alternate.lanes = mergeLanes(alternate.lanes, lane);\n  }\n\n  {\n    if (alternate === null && (sourceFiber.flags & (Placement | Hydrating)) !== NoFlags) {\n      warnAboutUpdateOnNotYetMountedFiberInDEV(sourceFiber);\n    }\n  } // Walk the parent path to the root and update the child expiration time.\n\n\n  var node = sourceFiber;\n  var parent = sourceFiber.return;\n\n  while (parent !== null) {\n    parent.childLanes = mergeLanes(parent.childLanes, lane);\n    alternate = parent.alternate;\n\n    if (alternate !== null) {\n      alternate.childLanes = mergeLanes(alternate.childLanes, lane);\n    } else {\n      {\n        if ((parent.flags & (Placement | Hydrating)) !== NoFlags) {\n          warnAboutUpdateOnNotYetMountedFiberInDEV(sourceFiber);\n        }\n      }\n    }\n\n    node = parent;\n    parent = parent.return;\n  }\n\n  if (node.tag === HostRoot) {\n    var root = node.stateNode;\n    return root;\n  } else {\n    return null;\n  }\n} // Use this function to schedule a task for a root. There's only one task per\n// root; if a task was already scheduled, we'll check to make sure the priority\n// of the existing task is the same as the priority of the next level that the\n// root has work on. This function is called on every update, and right before\n// exiting a task.\n\n\nfunction ensureRootIsScheduled(root, currentTime) {\n  var existingCallbackNode = root.callbackNode; // Check if any lanes are being starved by other work. If so, mark them as\n  // expired so we know to work on those next.\n\n  markStarvedLanesAsExpired(root, currentTime); // Determine the next lanes to work on, and their priority.\n\n  var nextLanes = getNextLanes(root, root === workInProgressRoot ? workInProgressRootRenderLanes : NoLanes); // This returns the priority level computed during the `getNextLanes` call.\n\n  var newCallbackPriority = returnNextLanesPriority();\n\n  if (nextLanes === NoLanes) {\n    // Special case: There's nothing to work on.\n    if (existingCallbackNode !== null) {\n      cancelCallback(existingCallbackNode);\n      root.callbackNode = null;\n      root.callbackPriority = NoLanePriority;\n    }\n\n    return;\n  } // Check if there's an existing task. We may be able to reuse it.\n\n\n  if (existingCallbackNode !== null) {\n    var existingCallbackPriority = root.callbackPriority;\n\n    if (existingCallbackPriority === newCallbackPriority) {\n      // The priority hasn't changed. We can reuse the existing task. Exit.\n      return;\n    } // The priority changed. Cancel the existing callback. We'll schedule a new\n    // one below.\n\n\n    cancelCallback(existingCallbackNode);\n  } // Schedule a new callback.\n\n\n  var newCallbackNode;\n\n  if (newCallbackPriority === SyncLanePriority) {\n    // Special case: Sync React callbacks are scheduled on a special\n    // internal queue\n    newCallbackNode = scheduleSyncCallback(performSyncWorkOnRoot.bind(null, root));\n  } else if (newCallbackPriority === SyncBatchedLanePriority) {\n    newCallbackNode = scheduleCallback(ImmediatePriority$1, performSyncWorkOnRoot.bind(null, root));\n  } else {\n    var schedulerPriorityLevel = lanePriorityToSchedulerPriority(newCallbackPriority);\n    newCallbackNode = scheduleCallback(schedulerPriorityLevel, performConcurrentWorkOnRoot.bind(null, root));\n  }\n\n  root.callbackPriority = newCallbackPriority;\n  root.callbackNode = newCallbackNode;\n} // This is the entry point for every concurrent task, i.e. anything that\n// goes through Scheduler.\n\n\nfunction performConcurrentWorkOnRoot(root) {\n  // Since we know we're in a React event, we can clear the current\n  // event time. The next update will compute a new event time.\n  currentEventTime = NoTimestamp;\n  currentEventWipLanes = NoLanes;\n  currentEventPendingLanes = NoLanes;\n\n  if (!((executionContext & (RenderContext | CommitContext)) === NoContext)) {\n    {\n      throw Error( \"Should not already be working.\" );\n    }\n  } // Flush any pending passive effects before deciding which lanes to work on,\n  // in case they schedule additional work.\n\n\n  var originalCallbackNode = root.callbackNode;\n  var didFlushPassiveEffects = flushPassiveEffects();\n\n  if (didFlushPassiveEffects) {\n    // Something in the passive effect phase may have canceled the current task.\n    // Check if the task node for this root was changed.\n    if (root.callbackNode !== originalCallbackNode) {\n      // The current task was canceled. Exit. We don't need to call\n      // `ensureRootIsScheduled` because the check above implies either that\n      // there's a new task, or that there's no remaining work on this root.\n      return null;\n    }\n  } // Determine the next expiration time to work on, using the fields stored\n  // on the root.\n\n\n  var lanes = getNextLanes(root, root === workInProgressRoot ? workInProgressRootRenderLanes : NoLanes);\n\n  if (lanes === NoLanes) {\n    // Defensive coding. This is never expected to happen.\n    return null;\n  }\n\n  var exitStatus = renderRootConcurrent(root, lanes);\n\n  if (includesSomeLane(workInProgressRootIncludedLanes, workInProgressRootUpdatedLanes)) {\n    // The render included lanes that were updated during the render phase.\n    // For example, when unhiding a hidden tree, we include all the lanes\n    // that were previously skipped when the tree was hidden. That set of\n    // lanes is a superset of the lanes we started rendering with.\n    //\n    // So we'll throw out the current work and restart.\n    prepareFreshStack(root, NoLanes);\n  } else if (exitStatus !== RootIncomplete) {\n    if (exitStatus === RootErrored) {\n      executionContext |= RetryAfterError; // If an error occurred during hydration,\n      // discard server response and fall back to client side render.\n\n      if (root.hydrate) {\n        root.hydrate = false;\n        clearContainer(root.containerInfo);\n      } // If something threw an error, try rendering one more time. We'll render\n      // synchronously to block concurrent data mutations, and we'll includes\n      // all pending updates are included. If it still fails after the second\n      // attempt, we'll give up and commit the resulting tree.\n\n\n      lanes = getLanesToRetrySynchronouslyOnError(root);\n\n      if (lanes !== NoLanes) {\n        exitStatus = renderRootSync(root, lanes);\n      }\n    }\n\n    if (exitStatus === RootFatalErrored) {\n      var fatalError = workInProgressRootFatalError;\n      prepareFreshStack(root, NoLanes);\n      markRootSuspended$1(root, lanes);\n      ensureRootIsScheduled(root, now());\n      throw fatalError;\n    } // We now have a consistent tree. The next step is either to commit it,\n    // or, if something suspended, wait to commit it after a timeout.\n\n\n    var finishedWork = root.current.alternate;\n    root.finishedWork = finishedWork;\n    root.finishedLanes = lanes;\n    finishConcurrentRender(root, exitStatus, lanes);\n  }\n\n  ensureRootIsScheduled(root, now());\n\n  if (root.callbackNode === originalCallbackNode) {\n    // The task node scheduled for this root is the same one that's\n    // currently executed. Need to return a continuation.\n    return performConcurrentWorkOnRoot.bind(null, root);\n  }\n\n  return null;\n}\n\nfunction finishConcurrentRender(root, exitStatus, lanes) {\n  switch (exitStatus) {\n    case RootIncomplete:\n    case RootFatalErrored:\n      {\n        {\n          {\n            throw Error( \"Root did not complete. This is a bug in React.\" );\n          }\n        }\n      }\n    // Flow knows about invariant, so it complains if I add a break\n    // statement, but eslint doesn't know about invariant, so it complains\n    // if I do. eslint-disable-next-line no-fallthrough\n\n    case RootErrored:\n      {\n        // We should have already attempted to retry this tree. If we reached\n        // this point, it errored again. Commit it.\n        commitRoot(root);\n        break;\n      }\n\n    case RootSuspended:\n      {\n        markRootSuspended$1(root, lanes); // We have an acceptable loading state. We need to figure out if we\n        // should immediately commit it or wait a bit.\n\n        if (includesOnlyRetries(lanes) && // do not delay if we're inside an act() scope\n        !shouldForceFlushFallbacksInDEV()) {\n          // This render only included retries, no updates. Throttle committing\n          // retries so that we don't show too many loading states too quickly.\n          var msUntilTimeout = globalMostRecentFallbackTime + FALLBACK_THROTTLE_MS - now(); // Don't bother with a very short suspense time.\n\n          if (msUntilTimeout > 10) {\n            var nextLanes = getNextLanes(root, NoLanes);\n\n            if (nextLanes !== NoLanes) {\n              // There's additional work on this root.\n              break;\n            }\n\n            var suspendedLanes = root.suspendedLanes;\n\n            if (!isSubsetOfLanes(suspendedLanes, lanes)) {\n              // We should prefer to render the fallback of at the last\n              // suspended level. Ping the last suspended level to try\n              // rendering it again.\n              // FIXME: What if the suspended lanes are Idle? Should not restart.\n              var eventTime = requestEventTime();\n              markRootPinged(root, suspendedLanes);\n              break;\n            } // The render is suspended, it hasn't timed out, and there's no\n            // lower priority work to do. Instead of committing the fallback\n            // immediately, wait for more data to arrive.\n\n\n            root.timeoutHandle = scheduleTimeout(commitRoot.bind(null, root), msUntilTimeout);\n            break;\n          }\n        } // The work expired. Commit immediately.\n\n\n        commitRoot(root);\n        break;\n      }\n\n    case RootSuspendedWithDelay:\n      {\n        markRootSuspended$1(root, lanes);\n\n        if (includesOnlyTransitions(lanes)) {\n          // This is a transition, so we should exit without committing a\n          // placeholder and without scheduling a timeout. Delay indefinitely\n          // until we receive more data.\n          break;\n        }\n\n        if (!shouldForceFlushFallbacksInDEV()) {\n          // This is not a transition, but we did trigger an avoided state.\n          // Schedule a placeholder to display after a short delay, using the Just\n          // Noticeable Difference.\n          // TODO: Is the JND optimization worth the added complexity? If this is\n          // the only reason we track the event time, then probably not.\n          // Consider removing.\n          var mostRecentEventTime = getMostRecentEventTime(root, lanes);\n          var eventTimeMs = mostRecentEventTime;\n          var timeElapsedMs = now() - eventTimeMs;\n\n          var _msUntilTimeout = jnd(timeElapsedMs) - timeElapsedMs; // Don't bother with a very short suspense time.\n\n\n          if (_msUntilTimeout > 10) {\n            // Instead of committing the fallback immediately, wait for more data\n            // to arrive.\n            root.timeoutHandle = scheduleTimeout(commitRoot.bind(null, root), _msUntilTimeout);\n            break;\n          }\n        } // Commit the placeholder.\n\n\n        commitRoot(root);\n        break;\n      }\n\n    case RootCompleted:\n      {\n        // The work completed. Ready to commit.\n        commitRoot(root);\n        break;\n      }\n\n    default:\n      {\n        {\n          {\n            throw Error( \"Unknown root exit status.\" );\n          }\n        }\n      }\n  }\n}\n\nfunction markRootSuspended$1(root, suspendedLanes) {\n  // When suspending, we should always exclude lanes that were pinged or (more\n  // rarely, since we try to avoid it) updated during the render phase.\n  // TODO: Lol maybe there's a better way to factor this besides this\n  // obnoxiously named function :)\n  suspendedLanes = removeLanes(suspendedLanes, workInProgressRootPingedLanes);\n  suspendedLanes = removeLanes(suspendedLanes, workInProgressRootUpdatedLanes);\n  markRootSuspended(root, suspendedLanes);\n} // This is the entry point for synchronous tasks that don't go\n// through Scheduler\n\n\nfunction performSyncWorkOnRoot(root) {\n  if (!((executionContext & (RenderContext | CommitContext)) === NoContext)) {\n    {\n      throw Error( \"Should not already be working.\" );\n    }\n  }\n\n  flushPassiveEffects();\n  var lanes;\n  var exitStatus;\n\n  if (root === workInProgressRoot && includesSomeLane(root.expiredLanes, workInProgressRootRenderLanes)) {\n    // There's a partial tree, and at least one of its lanes has expired. Finish\n    // rendering it before rendering the rest of the expired work.\n    lanes = workInProgressRootRenderLanes;\n    exitStatus = renderRootSync(root, lanes);\n\n    if (includesSomeLane(workInProgressRootIncludedLanes, workInProgressRootUpdatedLanes)) {\n      // The render included lanes that were updated during the render phase.\n      // For example, when unhiding a hidden tree, we include all the lanes\n      // that were previously skipped when the tree was hidden. That set of\n      // lanes is a superset of the lanes we started rendering with.\n      //\n      // Note that this only happens when part of the tree is rendered\n      // concurrently. If the whole tree is rendered synchronously, then there\n      // are no interleaved events.\n      lanes = getNextLanes(root, lanes);\n      exitStatus = renderRootSync(root, lanes);\n    }\n  } else {\n    lanes = getNextLanes(root, NoLanes);\n    exitStatus = renderRootSync(root, lanes);\n  }\n\n  if (root.tag !== LegacyRoot && exitStatus === RootErrored) {\n    executionContext |= RetryAfterError; // If an error occurred during hydration,\n    // discard server response and fall back to client side render.\n\n    if (root.hydrate) {\n      root.hydrate = false;\n      clearContainer(root.containerInfo);\n    } // If something threw an error, try rendering one more time. We'll render\n    // synchronously to block concurrent data mutations, and we'll includes\n    // all pending updates are included. If it still fails after the second\n    // attempt, we'll give up and commit the resulting tree.\n\n\n    lanes = getLanesToRetrySynchronouslyOnError(root);\n\n    if (lanes !== NoLanes) {\n      exitStatus = renderRootSync(root, lanes);\n    }\n  }\n\n  if (exitStatus === RootFatalErrored) {\n    var fatalError = workInProgressRootFatalError;\n    prepareFreshStack(root, NoLanes);\n    markRootSuspended$1(root, lanes);\n    ensureRootIsScheduled(root, now());\n    throw fatalError;\n  } // We now have a consistent tree. Because this is a sync render, we\n  // will commit it even if something suspended.\n\n\n  var finishedWork = root.current.alternate;\n  root.finishedWork = finishedWork;\n  root.finishedLanes = lanes;\n  commitRoot(root); // Before exiting, make sure there's a callback scheduled for the next\n  // pending level.\n\n  ensureRootIsScheduled(root, now());\n  return null;\n}\nfunction flushDiscreteUpdates() {\n  // TODO: Should be able to flush inside batchedUpdates, but not inside `act`.\n  // However, `act` uses `batchedUpdates`, so there's no way to distinguish\n  // those two cases. Need to fix this before exposing flushDiscreteUpdates\n  // as a public API.\n  if ((executionContext & (BatchedContext | RenderContext | CommitContext)) !== NoContext) {\n    {\n      if ((executionContext & RenderContext) !== NoContext) {\n        error('unstable_flushDiscreteUpdates: Cannot flush updates when React is ' + 'already rendering.');\n      }\n    } // We're already rendering, so we can't synchronously flush pending work.\n    // This is probably a nested event dispatch triggered by a lifecycle/effect,\n    // like `el.focus()`. Exit.\n\n\n    return;\n  }\n\n  flushPendingDiscreteUpdates(); // If the discrete updates scheduled passive effects, flush them now so that\n  // they fire before the next serial event.\n\n  flushPassiveEffects();\n}\n\nfunction flushPendingDiscreteUpdates() {\n  if (rootsWithPendingDiscreteUpdates !== null) {\n    // For each root with pending discrete updates, schedule a callback to\n    // immediately flush them.\n    var roots = rootsWithPendingDiscreteUpdates;\n    rootsWithPendingDiscreteUpdates = null;\n    roots.forEach(function (root) {\n      markDiscreteUpdatesExpired(root);\n      ensureRootIsScheduled(root, now());\n    });\n  } // Now flush the immediate queue.\n\n\n  flushSyncCallbackQueue();\n}\n\nfunction batchedUpdates$1(fn, a) {\n  var prevExecutionContext = executionContext;\n  executionContext |= BatchedContext;\n\n  try {\n    return fn(a);\n  } finally {\n    executionContext = prevExecutionContext;\n\n    if (executionContext === NoContext) {\n      // Flush the immediate callbacks that were scheduled during this batch\n      resetRenderTimer();\n      flushSyncCallbackQueue();\n    }\n  }\n}\nfunction batchedEventUpdates$1(fn, a) {\n  var prevExecutionContext = executionContext;\n  executionContext |= EventContext;\n\n  try {\n    return fn(a);\n  } finally {\n    executionContext = prevExecutionContext;\n\n    if (executionContext === NoContext) {\n      // Flush the immediate callbacks that were scheduled during this batch\n      resetRenderTimer();\n      flushSyncCallbackQueue();\n    }\n  }\n}\nfunction discreteUpdates$1(fn, a, b, c, d) {\n  var prevExecutionContext = executionContext;\n  executionContext |= DiscreteEventContext;\n\n  {\n    try {\n      return runWithPriority$1(UserBlockingPriority$2, fn.bind(null, a, b, c, d));\n    } finally {\n      executionContext = prevExecutionContext;\n\n      if (executionContext === NoContext) {\n        // Flush the immediate callbacks that were scheduled during this batch\n        resetRenderTimer();\n        flushSyncCallbackQueue();\n      }\n    }\n  }\n}\nfunction unbatchedUpdates(fn, a) {\n  var prevExecutionContext = executionContext;\n  executionContext &= ~BatchedContext;\n  executionContext |= LegacyUnbatchedContext;\n\n  try {\n    return fn(a);\n  } finally {\n    executionContext = prevExecutionContext;\n\n    if (executionContext === NoContext) {\n      // Flush the immediate callbacks that were scheduled during this batch\n      resetRenderTimer();\n      flushSyncCallbackQueue();\n    }\n  }\n}\nfunction flushSync(fn, a) {\n  var prevExecutionContext = executionContext;\n\n  if ((prevExecutionContext & (RenderContext | CommitContext)) !== NoContext) {\n    {\n      error('flushSync was called from inside a lifecycle method. React cannot ' + 'flush when React is already rendering. Consider moving this call to ' + 'a scheduler task or micro task.');\n    }\n\n    return fn(a);\n  }\n\n  executionContext |= BatchedContext;\n\n  {\n    try {\n      if (fn) {\n        return runWithPriority$1(ImmediatePriority$1, fn.bind(null, a));\n      } else {\n        return undefined;\n      }\n    } finally {\n      executionContext = prevExecutionContext; // Flush the immediate callbacks that were scheduled during this batch.\n      // Note that this will happen even if batchedUpdates is higher up\n      // the stack.\n\n      flushSyncCallbackQueue();\n    }\n  }\n}\nfunction pushRenderLanes(fiber, lanes) {\n  push(subtreeRenderLanesCursor, subtreeRenderLanes, fiber);\n  subtreeRenderLanes = mergeLanes(subtreeRenderLanes, lanes);\n  workInProgressRootIncludedLanes = mergeLanes(workInProgressRootIncludedLanes, lanes);\n}\nfunction popRenderLanes(fiber) {\n  subtreeRenderLanes = subtreeRenderLanesCursor.current;\n  pop(subtreeRenderLanesCursor, fiber);\n}\n\nfunction prepareFreshStack(root, lanes) {\n  root.finishedWork = null;\n  root.finishedLanes = NoLanes;\n  var timeoutHandle = root.timeoutHandle;\n\n  if (timeoutHandle !== noTimeout) {\n    // The root previous suspended and scheduled a timeout to commit a fallback\n    // state. Now that we have additional work, cancel the timeout.\n    root.timeoutHandle = noTimeout; // $FlowFixMe Complains noTimeout is not a TimeoutID, despite the check above\n\n    cancelTimeout(timeoutHandle);\n  }\n\n  if (workInProgress !== null) {\n    var interruptedWork = workInProgress.return;\n\n    while (interruptedWork !== null) {\n      unwindInterruptedWork(interruptedWork);\n      interruptedWork = interruptedWork.return;\n    }\n  }\n\n  workInProgressRoot = root;\n  workInProgress = createWorkInProgress(root.current, null);\n  workInProgressRootRenderLanes = subtreeRenderLanes = workInProgressRootIncludedLanes = lanes;\n  workInProgressRootExitStatus = RootIncomplete;\n  workInProgressRootFatalError = null;\n  workInProgressRootSkippedLanes = NoLanes;\n  workInProgressRootUpdatedLanes = NoLanes;\n  workInProgressRootPingedLanes = NoLanes;\n\n  {\n    spawnedWorkDuringRender = null;\n  }\n\n  {\n    ReactStrictModeWarnings.discardPendingWarnings();\n  }\n}\n\nfunction handleError(root, thrownValue) {\n  do {\n    var erroredWork = workInProgress;\n\n    try {\n      // Reset module-level state that was set during the render phase.\n      resetContextDependencies();\n      resetHooksAfterThrow();\n      resetCurrentFiber(); // TODO: I found and added this missing line while investigating a\n      // separate issue. Write a regression test using string refs.\n\n      ReactCurrentOwner$2.current = null;\n\n      if (erroredWork === null || erroredWork.return === null) {\n        // Expected to be working on a non-root fiber. This is a fatal error\n        // because there's no ancestor that can handle it; the root is\n        // supposed to capture all errors that weren't caught by an error\n        // boundary.\n        workInProgressRootExitStatus = RootFatalErrored;\n        workInProgressRootFatalError = thrownValue; // Set `workInProgress` to null. This represents advancing to the next\n        // sibling, or the parent if there are no siblings. But since the root\n        // has no siblings nor a parent, we set it to null. Usually this is\n        // handled by `completeUnitOfWork` or `unwindWork`, but since we're\n        // intentionally not calling those, we need set it here.\n        // TODO: Consider calling `unwindWork` to pop the contexts.\n\n        workInProgress = null;\n        return;\n      }\n\n      if (enableProfilerTimer && erroredWork.mode & ProfileMode) {\n        // Record the time spent rendering before an error was thrown. This\n        // avoids inaccurate Profiler durations in the case of a\n        // suspended render.\n        stopProfilerTimerIfRunningAndRecordDelta(erroredWork, true);\n      }\n\n      throwException(root, erroredWork.return, erroredWork, thrownValue, workInProgressRootRenderLanes);\n      completeUnitOfWork(erroredWork);\n    } catch (yetAnotherThrownValue) {\n      // Something in the return path also threw.\n      thrownValue = yetAnotherThrownValue;\n\n      if (workInProgress === erroredWork && erroredWork !== null) {\n        // If this boundary has already errored, then we had trouble processing\n        // the error. Bubble it to the next boundary.\n        erroredWork = erroredWork.return;\n        workInProgress = erroredWork;\n      } else {\n        erroredWork = workInProgress;\n      }\n\n      continue;\n    } // Return to the normal work loop.\n\n\n    return;\n  } while (true);\n}\n\nfunction pushDispatcher() {\n  var prevDispatcher = ReactCurrentDispatcher$2.current;\n  ReactCurrentDispatcher$2.current = ContextOnlyDispatcher;\n\n  if (prevDispatcher === null) {\n    // The React isomorphic package does not include a default dispatcher.\n    // Instead the first renderer will lazily attach one, in order to give\n    // nicer error messages.\n    return ContextOnlyDispatcher;\n  } else {\n    return prevDispatcher;\n  }\n}\n\nfunction popDispatcher(prevDispatcher) {\n  ReactCurrentDispatcher$2.current = prevDispatcher;\n}\n\nfunction pushInteractions(root) {\n  {\n    var prevInteractions = tracing.__interactionsRef.current;\n    tracing.__interactionsRef.current = root.memoizedInteractions;\n    return prevInteractions;\n  }\n}\n\nfunction popInteractions(prevInteractions) {\n  {\n    tracing.__interactionsRef.current = prevInteractions;\n  }\n}\n\nfunction markCommitTimeOfFallback() {\n  globalMostRecentFallbackTime = now();\n}\nfunction markSkippedUpdateLanes(lane) {\n  workInProgressRootSkippedLanes = mergeLanes(lane, workInProgressRootSkippedLanes);\n}\nfunction renderDidSuspend() {\n  if (workInProgressRootExitStatus === RootIncomplete) {\n    workInProgressRootExitStatus = RootSuspended;\n  }\n}\nfunction renderDidSuspendDelayIfPossible() {\n  if (workInProgressRootExitStatus === RootIncomplete || workInProgressRootExitStatus === RootSuspended) {\n    workInProgressRootExitStatus = RootSuspendedWithDelay;\n  } // Check if there are updates that we skipped tree that might have unblocked\n  // this render.\n\n\n  if (workInProgressRoot !== null && (includesNonIdleWork(workInProgressRootSkippedLanes) || includesNonIdleWork(workInProgressRootUpdatedLanes))) {\n    // Mark the current render as suspended so that we switch to working on\n    // the updates that were skipped. Usually we only suspend at the end of\n    // the render phase.\n    // TODO: We should probably always mark the root as suspended immediately\n    // (inside this function), since by suspending at the end of the render\n    // phase introduces a potential mistake where we suspend lanes that were\n    // pinged or updated while we were rendering.\n    markRootSuspended$1(workInProgressRoot, workInProgressRootRenderLanes);\n  }\n}\nfunction renderDidError() {\n  if (workInProgressRootExitStatus !== RootCompleted) {\n    workInProgressRootExitStatus = RootErrored;\n  }\n} // Called during render to determine if anything has suspended.\n// Returns false if we're not sure.\n\nfunction renderHasNotSuspendedYet() {\n  // If something errored or completed, we can't really be sure,\n  // so those are false.\n  return workInProgressRootExitStatus === RootIncomplete;\n}\n\nfunction renderRootSync(root, lanes) {\n  var prevExecutionContext = executionContext;\n  executionContext |= RenderContext;\n  var prevDispatcher = pushDispatcher(); // If the root or lanes have changed, throw out the existing stack\n  // and prepare a fresh one. Otherwise we'll continue where we left off.\n\n  if (workInProgressRoot !== root || workInProgressRootRenderLanes !== lanes) {\n    prepareFreshStack(root, lanes);\n    startWorkOnPendingInteractions(root, lanes);\n  }\n\n  var prevInteractions = pushInteractions(root);\n\n  do {\n    try {\n      workLoopSync();\n      break;\n    } catch (thrownValue) {\n      handleError(root, thrownValue);\n    }\n  } while (true);\n\n  resetContextDependencies();\n\n  {\n    popInteractions(prevInteractions);\n  }\n\n  executionContext = prevExecutionContext;\n  popDispatcher(prevDispatcher);\n\n  if (workInProgress !== null) {\n    // This is a sync render, so we should have finished the whole tree.\n    {\n      {\n        throw Error( \"Cannot commit an incomplete root. This error is likely caused by a bug in React. Please file an issue.\" );\n      }\n    }\n  }\n\n\n  workInProgressRoot = null;\n  workInProgressRootRenderLanes = NoLanes;\n  return workInProgressRootExitStatus;\n} // The work loop is an extremely hot path. Tell Closure not to inline it.\n\n/** @noinline */\n\n\nfunction workLoopSync() {\n  // Already timed out, so perform work without checking if we need to yield.\n  while (workInProgress !== null) {\n    performUnitOfWork(workInProgress);\n  }\n}\n\nfunction renderRootConcurrent(root, lanes) {\n  var prevExecutionContext = executionContext;\n  executionContext |= RenderContext;\n  var prevDispatcher = pushDispatcher(); // If the root or lanes have changed, throw out the existing stack\n  // and prepare a fresh one. Otherwise we'll continue where we left off.\n\n  if (workInProgressRoot !== root || workInProgressRootRenderLanes !== lanes) {\n    resetRenderTimer();\n    prepareFreshStack(root, lanes);\n    startWorkOnPendingInteractions(root, lanes);\n  }\n\n  var prevInteractions = pushInteractions(root);\n\n  do {\n    try {\n      workLoopConcurrent();\n      break;\n    } catch (thrownValue) {\n      handleError(root, thrownValue);\n    }\n  } while (true);\n\n  resetContextDependencies();\n\n  {\n    popInteractions(prevInteractions);\n  }\n\n  popDispatcher(prevDispatcher);\n  executionContext = prevExecutionContext;\n\n\n  if (workInProgress !== null) {\n\n    return RootIncomplete;\n  } else {\n\n\n    workInProgressRoot = null;\n    workInProgressRootRenderLanes = NoLanes; // Return the final exit status.\n\n    return workInProgressRootExitStatus;\n  }\n}\n/** @noinline */\n\n\nfunction workLoopConcurrent() {\n  // Perform work until Scheduler asks us to yield\n  while (workInProgress !== null && !shouldYield()) {\n    performUnitOfWork(workInProgress);\n  }\n}\n\nfunction performUnitOfWork(unitOfWork) {\n  // The current, flushed, state of this fiber is the alternate. Ideally\n  // nothing should rely on this, but relying on it here means that we don't\n  // need an additional field on the work in progress.\n  var current = unitOfWork.alternate;\n  setCurrentFiber(unitOfWork);\n  var next;\n\n  if ( (unitOfWork.mode & ProfileMode) !== NoMode) {\n    startProfilerTimer(unitOfWork);\n    next = beginWork$1(current, unitOfWork, subtreeRenderLanes);\n    stopProfilerTimerIfRunningAndRecordDelta(unitOfWork, true);\n  } else {\n    next = beginWork$1(current, unitOfWork, subtreeRenderLanes);\n  }\n\n  resetCurrentFiber();\n  unitOfWork.memoizedProps = unitOfWork.pendingProps;\n\n  if (next === null) {\n    // If this doesn't spawn new work, complete the current work.\n    completeUnitOfWork(unitOfWork);\n  } else {\n    workInProgress = next;\n  }\n\n  ReactCurrentOwner$2.current = null;\n}\n\nfunction completeUnitOfWork(unitOfWork) {\n  // Attempt to complete the current unit of work, then move to the next\n  // sibling. If there are no more siblings, return to the parent fiber.\n  var completedWork = unitOfWork;\n\n  do {\n    // The current, flushed, state of this fiber is the alternate. Ideally\n    // nothing should rely on this, but relying on it here means that we don't\n    // need an additional field on the work in progress.\n    var current = completedWork.alternate;\n    var returnFiber = completedWork.return; // Check if the work completed or if something threw.\n\n    if ((completedWork.flags & Incomplete) === NoFlags) {\n      setCurrentFiber(completedWork);\n      var next = void 0;\n\n      if ( (completedWork.mode & ProfileMode) === NoMode) {\n        next = completeWork(current, completedWork, subtreeRenderLanes);\n      } else {\n        startProfilerTimer(completedWork);\n        next = completeWork(current, completedWork, subtreeRenderLanes); // Update render duration assuming we didn't error.\n\n        stopProfilerTimerIfRunningAndRecordDelta(completedWork, false);\n      }\n\n      resetCurrentFiber();\n\n      if (next !== null) {\n        // Completing this fiber spawned new work. Work on that next.\n        workInProgress = next;\n        return;\n      }\n\n      resetChildLanes(completedWork);\n\n      if (returnFiber !== null && // Do not append effects to parents if a sibling failed to complete\n      (returnFiber.flags & Incomplete) === NoFlags) {\n        // Append all the effects of the subtree and this fiber onto the effect\n        // list of the parent. The completion order of the children affects the\n        // side-effect order.\n        if (returnFiber.firstEffect === null) {\n          returnFiber.firstEffect = completedWork.firstEffect;\n        }\n\n        if (completedWork.lastEffect !== null) {\n          if (returnFiber.lastEffect !== null) {\n            returnFiber.lastEffect.nextEffect = completedWork.firstEffect;\n          }\n\n          returnFiber.lastEffect = completedWork.lastEffect;\n        } // If this fiber had side-effects, we append it AFTER the children's\n        // side-effects. We can perform certain side-effects earlier if needed,\n        // by doing multiple passes over the effect list. We don't want to\n        // schedule our own side-effect on our own list because if end up\n        // reusing children we'll schedule this effect onto itself since we're\n        // at the end.\n\n\n        var flags = completedWork.flags; // Skip both NoWork and PerformedWork tags when creating the effect\n        // list. PerformedWork effect is read by React DevTools but shouldn't be\n        // committed.\n\n        if (flags > PerformedWork) {\n          if (returnFiber.lastEffect !== null) {\n            returnFiber.lastEffect.nextEffect = completedWork;\n          } else {\n            returnFiber.firstEffect = completedWork;\n          }\n\n          returnFiber.lastEffect = completedWork;\n        }\n      }\n    } else {\n      // This fiber did not complete because something threw. Pop values off\n      // the stack without entering the complete phase. If this is a boundary,\n      // capture values if possible.\n      var _next = unwindWork(completedWork); // Because this fiber did not complete, don't reset its expiration time.\n\n\n      if (_next !== null) {\n        // If completing this work spawned new work, do that next. We'll come\n        // back here again.\n        // Since we're restarting, remove anything that is not a host effect\n        // from the effect tag.\n        _next.flags &= HostEffectMask;\n        workInProgress = _next;\n        return;\n      }\n\n      if ( (completedWork.mode & ProfileMode) !== NoMode) {\n        // Record the render duration for the fiber that errored.\n        stopProfilerTimerIfRunningAndRecordDelta(completedWork, false); // Include the time spent working on failed children before continuing.\n\n        var actualDuration = completedWork.actualDuration;\n        var child = completedWork.child;\n\n        while (child !== null) {\n          actualDuration += child.actualDuration;\n          child = child.sibling;\n        }\n\n        completedWork.actualDuration = actualDuration;\n      }\n\n      if (returnFiber !== null) {\n        // Mark the parent fiber as incomplete and clear its effect list.\n        returnFiber.firstEffect = returnFiber.lastEffect = null;\n        returnFiber.flags |= Incomplete;\n      }\n    }\n\n    var siblingFiber = completedWork.sibling;\n\n    if (siblingFiber !== null) {\n      // If there is more work to do in this returnFiber, do that next.\n      workInProgress = siblingFiber;\n      return;\n    } // Otherwise, return to the parent\n\n\n    completedWork = returnFiber; // Update the next thing we're working on in case something throws.\n\n    workInProgress = completedWork;\n  } while (completedWork !== null); // We've reached the root.\n\n\n  if (workInProgressRootExitStatus === RootIncomplete) {\n    workInProgressRootExitStatus = RootCompleted;\n  }\n}\n\nfunction resetChildLanes(completedWork) {\n  if ( // TODO: Move this check out of the hot path by moving `resetChildLanes`\n  // to switch statement in `completeWork`.\n  (completedWork.tag === LegacyHiddenComponent || completedWork.tag === OffscreenComponent) && completedWork.memoizedState !== null && !includesSomeLane(subtreeRenderLanes, OffscreenLane) && (completedWork.mode & ConcurrentMode) !== NoLanes) {\n    // The children of this component are hidden. Don't bubble their\n    // expiration times.\n    return;\n  }\n\n  var newChildLanes = NoLanes; // Bubble up the earliest expiration time.\n\n  if ( (completedWork.mode & ProfileMode) !== NoMode) {\n    // In profiling mode, resetChildExpirationTime is also used to reset\n    // profiler durations.\n    var actualDuration = completedWork.actualDuration;\n    var treeBaseDuration = completedWork.selfBaseDuration; // When a fiber is cloned, its actualDuration is reset to 0. This value will\n    // only be updated if work is done on the fiber (i.e. it doesn't bailout).\n    // When work is done, it should bubble to the parent's actualDuration. If\n    // the fiber has not been cloned though, (meaning no work was done), then\n    // this value will reflect the amount of time spent working on a previous\n    // render. In that case it should not bubble. We determine whether it was\n    // cloned by comparing the child pointer.\n\n    var shouldBubbleActualDurations = completedWork.alternate === null || completedWork.child !== completedWork.alternate.child;\n    var child = completedWork.child;\n\n    while (child !== null) {\n      newChildLanes = mergeLanes(newChildLanes, mergeLanes(child.lanes, child.childLanes));\n\n      if (shouldBubbleActualDurations) {\n        actualDuration += child.actualDuration;\n      }\n\n      treeBaseDuration += child.treeBaseDuration;\n      child = child.sibling;\n    }\n\n    var isTimedOutSuspense = completedWork.tag === SuspenseComponent && completedWork.memoizedState !== null;\n\n    if (isTimedOutSuspense) {\n      // Don't count time spent in a timed out Suspense subtree as part of the base duration.\n      var primaryChildFragment = completedWork.child;\n\n      if (primaryChildFragment !== null) {\n        treeBaseDuration -= primaryChildFragment.treeBaseDuration;\n      }\n    }\n\n    completedWork.actualDuration = actualDuration;\n    completedWork.treeBaseDuration = treeBaseDuration;\n  } else {\n    var _child = completedWork.child;\n\n    while (_child !== null) {\n      newChildLanes = mergeLanes(newChildLanes, mergeLanes(_child.lanes, _child.childLanes));\n      _child = _child.sibling;\n    }\n  }\n\n  completedWork.childLanes = newChildLanes;\n}\n\nfunction commitRoot(root) {\n  var renderPriorityLevel = getCurrentPriorityLevel();\n  runWithPriority$1(ImmediatePriority$1, commitRootImpl.bind(null, root, renderPriorityLevel));\n  return null;\n}\n\nfunction commitRootImpl(root, renderPriorityLevel) {\n  do {\n    // `flushPassiveEffects` will call `flushSyncUpdateQueue` at the end, which\n    // means `flushPassiveEffects` will sometimes result in additional\n    // passive effects. So we need to keep flushing in a loop until there are\n    // no more pending effects.\n    // TODO: Might be better if `flushPassiveEffects` did not automatically\n    // flush synchronous work at the end, to avoid factoring hazards like this.\n    flushPassiveEffects();\n  } while (rootWithPendingPassiveEffects !== null);\n\n  flushRenderPhaseStrictModeWarningsInDEV();\n\n  if (!((executionContext & (RenderContext | CommitContext)) === NoContext)) {\n    {\n      throw Error( \"Should not already be working.\" );\n    }\n  }\n\n  var finishedWork = root.finishedWork;\n  var lanes = root.finishedLanes;\n\n  if (finishedWork === null) {\n\n    return null;\n  }\n\n  root.finishedWork = null;\n  root.finishedLanes = NoLanes;\n\n  if (!(finishedWork !== root.current)) {\n    {\n      throw Error( \"Cannot commit the same tree as before. This error is likely caused by a bug in React. Please file an issue.\" );\n    }\n  } // commitRoot never returns a continuation; it always finishes synchronously.\n  // So we can clear these now to allow a new callback to be scheduled.\n\n\n  root.callbackNode = null; // Update the first and last pending times on this root. The new first\n  // pending time is whatever is left on the root fiber.\n\n  var remainingLanes = mergeLanes(finishedWork.lanes, finishedWork.childLanes);\n  markRootFinished(root, remainingLanes); // Clear already finished discrete updates in case that a later call of\n  // `flushDiscreteUpdates` starts a useless render pass which may cancels\n  // a scheduled timeout.\n\n  if (rootsWithPendingDiscreteUpdates !== null) {\n    if (!hasDiscreteLanes(remainingLanes) && rootsWithPendingDiscreteUpdates.has(root)) {\n      rootsWithPendingDiscreteUpdates.delete(root);\n    }\n  }\n\n  if (root === workInProgressRoot) {\n    // We can reset these now that they are finished.\n    workInProgressRoot = null;\n    workInProgress = null;\n    workInProgressRootRenderLanes = NoLanes;\n  } // Get the list of effects.\n\n\n  var firstEffect;\n\n  if (finishedWork.flags > PerformedWork) {\n    // A fiber's effect list consists only of its children, not itself. So if\n    // the root has an effect, we need to add it to the end of the list. The\n    // resulting list is the set that would belong to the root's parent, if it\n    // had one; that is, all the effects in the tree including the root.\n    if (finishedWork.lastEffect !== null) {\n      finishedWork.lastEffect.nextEffect = finishedWork;\n      firstEffect = finishedWork.firstEffect;\n    } else {\n      firstEffect = finishedWork;\n    }\n  } else {\n    // There is no effect on the root.\n    firstEffect = finishedWork.firstEffect;\n  }\n\n  if (firstEffect !== null) {\n\n    var prevExecutionContext = executionContext;\n    executionContext |= CommitContext;\n    var prevInteractions = pushInteractions(root); // Reset this to null before calling lifecycles\n\n    ReactCurrentOwner$2.current = null; // The commit phase is broken into several sub-phases. We do a separate pass\n    // of the effect list for each phase: all mutation effects come before all\n    // layout effects, and so on.\n    // The first phase a \"before mutation\" phase. We use this phase to read the\n    // state of the host tree right before we mutate it. This is where\n    // getSnapshotBeforeUpdate is called.\n\n    focusedInstanceHandle = prepareForCommit(root.containerInfo);\n    shouldFireAfterActiveInstanceBlur = false;\n    nextEffect = firstEffect;\n\n    do {\n      {\n        invokeGuardedCallback(null, commitBeforeMutationEffects, null);\n\n        if (hasCaughtError()) {\n          if (!(nextEffect !== null)) {\n            {\n              throw Error( \"Should be working on an effect.\" );\n            }\n          }\n\n          var error = clearCaughtError();\n          captureCommitPhaseError(nextEffect, error);\n          nextEffect = nextEffect.nextEffect;\n        }\n      }\n    } while (nextEffect !== null); // We no longer need to track the active instance fiber\n\n\n    focusedInstanceHandle = null;\n\n    {\n      // Mark the current commit time to be shared by all Profilers in this\n      // batch. This enables them to be grouped later.\n      recordCommitTime();\n    } // The next phase is the mutation phase, where we mutate the host tree.\n\n\n    nextEffect = firstEffect;\n\n    do {\n      {\n        invokeGuardedCallback(null, commitMutationEffects, null, root, renderPriorityLevel);\n\n        if (hasCaughtError()) {\n          if (!(nextEffect !== null)) {\n            {\n              throw Error( \"Should be working on an effect.\" );\n            }\n          }\n\n          var _error = clearCaughtError();\n\n          captureCommitPhaseError(nextEffect, _error);\n          nextEffect = nextEffect.nextEffect;\n        }\n      }\n    } while (nextEffect !== null);\n\n    resetAfterCommit(root.containerInfo); // The work-in-progress tree is now the current tree. This must come after\n    // the mutation phase, so that the previous tree is still current during\n    // componentWillUnmount, but before the layout phase, so that the finished\n    // work is current during componentDidMount/Update.\n\n    root.current = finishedWork; // The next phase is the layout phase, where we call effects that read\n    // the host tree after it's been mutated. The idiomatic use case for this is\n    // layout, but class component lifecycles also fire here for legacy reasons.\n\n    nextEffect = firstEffect;\n\n    do {\n      {\n        invokeGuardedCallback(null, commitLayoutEffects, null, root, lanes);\n\n        if (hasCaughtError()) {\n          if (!(nextEffect !== null)) {\n            {\n              throw Error( \"Should be working on an effect.\" );\n            }\n          }\n\n          var _error2 = clearCaughtError();\n\n          captureCommitPhaseError(nextEffect, _error2);\n          nextEffect = nextEffect.nextEffect;\n        }\n      }\n    } while (nextEffect !== null);\n\n    nextEffect = null; // Tell Scheduler to yield at the end of the frame, so the browser has an\n    // opportunity to paint.\n\n    requestPaint();\n\n    {\n      popInteractions(prevInteractions);\n    }\n\n    executionContext = prevExecutionContext;\n  } else {\n    // No effects.\n    root.current = finishedWork; // Measure these anyway so the flamegraph explicitly shows that there were\n    // no effects.\n    // TODO: Maybe there's a better way to report this.\n\n    {\n      recordCommitTime();\n    }\n  }\n\n  var rootDidHavePassiveEffects = rootDoesHavePassiveEffects;\n\n  if (rootDoesHavePassiveEffects) {\n    // This commit has passive effects. Stash a reference to them. But don't\n    // schedule a callback until after flushing layout work.\n    rootDoesHavePassiveEffects = false;\n    rootWithPendingPassiveEffects = root;\n    pendingPassiveEffectsLanes = lanes;\n    pendingPassiveEffectsRenderPriority = renderPriorityLevel;\n  } else {\n    // We are done with the effect chain at this point so let's clear the\n    // nextEffect pointers to assist with GC. If we have passive effects, we'll\n    // clear this in flushPassiveEffects.\n    nextEffect = firstEffect;\n\n    while (nextEffect !== null) {\n      var nextNextEffect = nextEffect.nextEffect;\n      nextEffect.nextEffect = null;\n\n      if (nextEffect.flags & Deletion) {\n        detachFiberAfterEffects(nextEffect);\n      }\n\n      nextEffect = nextNextEffect;\n    }\n  } // Read this again, since an effect might have updated it\n\n\n  remainingLanes = root.pendingLanes; // Check if there's remaining work on this root\n\n  if (remainingLanes !== NoLanes) {\n    {\n      if (spawnedWorkDuringRender !== null) {\n        var expirationTimes = spawnedWorkDuringRender;\n        spawnedWorkDuringRender = null;\n\n        for (var i = 0; i < expirationTimes.length; i++) {\n          scheduleInteractions(root, expirationTimes[i], root.memoizedInteractions);\n        }\n      }\n\n      schedulePendingInteractions(root, remainingLanes);\n    }\n  } else {\n    // If there's no remaining work, we can clear the set of already failed\n    // error boundaries.\n    legacyErrorBoundariesThatAlreadyFailed = null;\n  }\n\n  {\n    if (!rootDidHavePassiveEffects) {\n      // If there are no passive effects, then we can complete the pending interactions.\n      // Otherwise, we'll wait until after the passive effects are flushed.\n      // Wait to do this until after remaining work has been scheduled,\n      // so that we don't prematurely signal complete for interactions when there's e.g. hidden work.\n      finishPendingInteractions(root, lanes);\n    }\n  }\n\n  if (remainingLanes === SyncLane) {\n    // Count the number of times the root synchronously re-renders without\n    // finishing. If there are too many, it indicates an infinite update loop.\n    if (root === rootWithNestedUpdates) {\n      nestedUpdateCount++;\n    } else {\n      nestedUpdateCount = 0;\n      rootWithNestedUpdates = root;\n    }\n  } else {\n    nestedUpdateCount = 0;\n  }\n\n  onCommitRoot(finishedWork.stateNode, renderPriorityLevel);\n\n  {\n    onCommitRoot$1();\n  } // Always call this before exiting `commitRoot`, to ensure that any\n  // additional work on this root is scheduled.\n\n\n  ensureRootIsScheduled(root, now());\n\n  if (hasUncaughtError) {\n    hasUncaughtError = false;\n    var _error3 = firstUncaughtError;\n    firstUncaughtError = null;\n    throw _error3;\n  }\n\n  if ((executionContext & LegacyUnbatchedContext) !== NoContext) {\n    // a ReactDOM.render-ed root inside of batchedUpdates. The commit fired\n    // synchronously, but layout updates should be deferred until the end\n    // of the batch.\n\n\n    return null;\n  } // If layout work was scheduled, flush it now.\n\n\n  flushSyncCallbackQueue();\n\n  return null;\n}\n\nfunction commitBeforeMutationEffects() {\n  while (nextEffect !== null) {\n    var current = nextEffect.alternate;\n\n    if (!shouldFireAfterActiveInstanceBlur && focusedInstanceHandle !== null) {\n      if ((nextEffect.flags & Deletion) !== NoFlags) {\n        if (doesFiberContain(nextEffect, focusedInstanceHandle)) {\n          shouldFireAfterActiveInstanceBlur = true;\n        }\n      } else {\n        // TODO: Move this out of the hot path using a dedicated effect tag.\n        if (nextEffect.tag === SuspenseComponent && isSuspenseBoundaryBeingHidden(current, nextEffect) && doesFiberContain(nextEffect, focusedInstanceHandle)) {\n          shouldFireAfterActiveInstanceBlur = true;\n        }\n      }\n    }\n\n    var flags = nextEffect.flags;\n\n    if ((flags & Snapshot) !== NoFlags) {\n      setCurrentFiber(nextEffect);\n      commitBeforeMutationLifeCycles(current, nextEffect);\n      resetCurrentFiber();\n    }\n\n    if ((flags & Passive) !== NoFlags) {\n      // If there are passive effects, schedule a callback to flush at\n      // the earliest opportunity.\n      if (!rootDoesHavePassiveEffects) {\n        rootDoesHavePassiveEffects = true;\n        scheduleCallback(NormalPriority$1, function () {\n          flushPassiveEffects();\n          return null;\n        });\n      }\n    }\n\n    nextEffect = nextEffect.nextEffect;\n  }\n}\n\nfunction commitMutationEffects(root, renderPriorityLevel) {\n  // TODO: Should probably move the bulk of this function to commitWork.\n  while (nextEffect !== null) {\n    setCurrentFiber(nextEffect);\n    var flags = nextEffect.flags;\n\n    if (flags & ContentReset) {\n      commitResetTextContent(nextEffect);\n    }\n\n    if (flags & Ref) {\n      var current = nextEffect.alternate;\n\n      if (current !== null) {\n        commitDetachRef(current);\n      }\n    } // The following switch statement is only concerned about placement,\n    // updates, and deletions. To avoid needing to add a case for every possible\n    // bitmap value, we remove the secondary effects from the effect tag and\n    // switch on that value.\n\n\n    var primaryFlags = flags & (Placement | Update | Deletion | Hydrating);\n\n    switch (primaryFlags) {\n      case Placement:\n        {\n          commitPlacement(nextEffect); // Clear the \"placement\" from effect tag so that we know that this is\n          // inserted, before any life-cycles like componentDidMount gets called.\n          // TODO: findDOMNode doesn't rely on this any more but isMounted does\n          // and isMounted is deprecated anyway so we should be able to kill this.\n\n          nextEffect.flags &= ~Placement;\n          break;\n        }\n\n      case PlacementAndUpdate:\n        {\n          // Placement\n          commitPlacement(nextEffect); // Clear the \"placement\" from effect tag so that we know that this is\n          // inserted, before any life-cycles like componentDidMount gets called.\n\n          nextEffect.flags &= ~Placement; // Update\n\n          var _current = nextEffect.alternate;\n          commitWork(_current, nextEffect);\n          break;\n        }\n\n      case Hydrating:\n        {\n          nextEffect.flags &= ~Hydrating;\n          break;\n        }\n\n      case HydratingAndUpdate:\n        {\n          nextEffect.flags &= ~Hydrating; // Update\n\n          var _current2 = nextEffect.alternate;\n          commitWork(_current2, nextEffect);\n          break;\n        }\n\n      case Update:\n        {\n          var _current3 = nextEffect.alternate;\n          commitWork(_current3, nextEffect);\n          break;\n        }\n\n      case Deletion:\n        {\n          commitDeletion(root, nextEffect);\n          break;\n        }\n    }\n\n    resetCurrentFiber();\n    nextEffect = nextEffect.nextEffect;\n  }\n}\n\nfunction commitLayoutEffects(root, committedLanes) {\n\n\n  while (nextEffect !== null) {\n    setCurrentFiber(nextEffect);\n    var flags = nextEffect.flags;\n\n    if (flags & (Update | Callback)) {\n      var current = nextEffect.alternate;\n      commitLifeCycles(root, current, nextEffect);\n    }\n\n    {\n      if (flags & Ref) {\n        commitAttachRef(nextEffect);\n      }\n    }\n\n    resetCurrentFiber();\n    nextEffect = nextEffect.nextEffect;\n  }\n}\n\nfunction flushPassiveEffects() {\n  // Returns whether passive effects were flushed.\n  if (pendingPassiveEffectsRenderPriority !== NoPriority$1) {\n    var priorityLevel = pendingPassiveEffectsRenderPriority > NormalPriority$1 ? NormalPriority$1 : pendingPassiveEffectsRenderPriority;\n    pendingPassiveEffectsRenderPriority = NoPriority$1;\n\n    {\n      return runWithPriority$1(priorityLevel, flushPassiveEffectsImpl);\n    }\n  }\n\n  return false;\n}\nfunction enqueuePendingPassiveHookEffectMount(fiber, effect) {\n  pendingPassiveHookEffectsMount.push(effect, fiber);\n\n  if (!rootDoesHavePassiveEffects) {\n    rootDoesHavePassiveEffects = true;\n    scheduleCallback(NormalPriority$1, function () {\n      flushPassiveEffects();\n      return null;\n    });\n  }\n}\nfunction enqueuePendingPassiveHookEffectUnmount(fiber, effect) {\n  pendingPassiveHookEffectsUnmount.push(effect, fiber);\n\n  {\n    fiber.flags |= PassiveUnmountPendingDev;\n    var alternate = fiber.alternate;\n\n    if (alternate !== null) {\n      alternate.flags |= PassiveUnmountPendingDev;\n    }\n  }\n\n  if (!rootDoesHavePassiveEffects) {\n    rootDoesHavePassiveEffects = true;\n    scheduleCallback(NormalPriority$1, function () {\n      flushPassiveEffects();\n      return null;\n    });\n  }\n}\n\nfunction invokePassiveEffectCreate(effect) {\n  var create = effect.create;\n  effect.destroy = create();\n}\n\nfunction flushPassiveEffectsImpl() {\n  if (rootWithPendingPassiveEffects === null) {\n    return false;\n  }\n\n  var root = rootWithPendingPassiveEffects;\n  var lanes = pendingPassiveEffectsLanes;\n  rootWithPendingPassiveEffects = null;\n  pendingPassiveEffectsLanes = NoLanes;\n\n  if (!((executionContext & (RenderContext | CommitContext)) === NoContext)) {\n    {\n      throw Error( \"Cannot flush passive effects while already rendering.\" );\n    }\n  }\n\n  {\n    isFlushingPassiveEffects = true;\n  }\n\n  var prevExecutionContext = executionContext;\n  executionContext |= CommitContext;\n  var prevInteractions = pushInteractions(root); // It's important that ALL pending passive effect destroy functions are called\n  // before ANY passive effect create functions are called.\n  // Otherwise effects in sibling components might interfere with each other.\n  // e.g. a destroy function in one component may unintentionally override a ref\n  // value set by a create function in another component.\n  // Layout effects have the same constraint.\n  // First pass: Destroy stale passive effects.\n\n  var unmountEffects = pendingPassiveHookEffectsUnmount;\n  pendingPassiveHookEffectsUnmount = [];\n\n  for (var i = 0; i < unmountEffects.length; i += 2) {\n    var _effect = unmountEffects[i];\n    var fiber = unmountEffects[i + 1];\n    var destroy = _effect.destroy;\n    _effect.destroy = undefined;\n\n    {\n      fiber.flags &= ~PassiveUnmountPendingDev;\n      var alternate = fiber.alternate;\n\n      if (alternate !== null) {\n        alternate.flags &= ~PassiveUnmountPendingDev;\n      }\n    }\n\n    if (typeof destroy === 'function') {\n      {\n        setCurrentFiber(fiber);\n\n        {\n          invokeGuardedCallback(null, destroy, null);\n        }\n\n        if (hasCaughtError()) {\n          if (!(fiber !== null)) {\n            {\n              throw Error( \"Should be working on an effect.\" );\n            }\n          }\n\n          var error = clearCaughtError();\n          captureCommitPhaseError(fiber, error);\n        }\n\n        resetCurrentFiber();\n      }\n    }\n  } // Second pass: Create new passive effects.\n\n\n  var mountEffects = pendingPassiveHookEffectsMount;\n  pendingPassiveHookEffectsMount = [];\n\n  for (var _i = 0; _i < mountEffects.length; _i += 2) {\n    var _effect2 = mountEffects[_i];\n    var _fiber = mountEffects[_i + 1];\n\n    {\n      setCurrentFiber(_fiber);\n\n      {\n        invokeGuardedCallback(null, invokePassiveEffectCreate, null, _effect2);\n      }\n\n      if (hasCaughtError()) {\n        if (!(_fiber !== null)) {\n          {\n            throw Error( \"Should be working on an effect.\" );\n          }\n        }\n\n        var _error4 = clearCaughtError();\n\n        captureCommitPhaseError(_fiber, _error4);\n      }\n\n      resetCurrentFiber();\n    }\n  } // Note: This currently assumes there are no passive effects on the root fiber\n  // because the root is not part of its own effect list.\n  // This could change in the future.\n\n\n  var effect = root.current.firstEffect;\n\n  while (effect !== null) {\n    var nextNextEffect = effect.nextEffect; // Remove nextEffect pointer to assist GC\n\n    effect.nextEffect = null;\n\n    if (effect.flags & Deletion) {\n      detachFiberAfterEffects(effect);\n    }\n\n    effect = nextNextEffect;\n  }\n\n  {\n    popInteractions(prevInteractions);\n    finishPendingInteractions(root, lanes);\n  }\n\n  {\n    isFlushingPassiveEffects = false;\n  }\n\n  executionContext = prevExecutionContext;\n  flushSyncCallbackQueue(); // If additional passive effects were scheduled, increment a counter. If this\n  // exceeds the limit, we'll fire a warning.\n\n  nestedPassiveUpdateCount = rootWithPendingPassiveEffects === null ? 0 : nestedPassiveUpdateCount + 1;\n  return true;\n}\n\nfunction isAlreadyFailedLegacyErrorBoundary(instance) {\n  return legacyErrorBoundariesThatAlreadyFailed !== null && legacyErrorBoundariesThatAlreadyFailed.has(instance);\n}\nfunction markLegacyErrorBoundaryAsFailed(instance) {\n  if (legacyErrorBoundariesThatAlreadyFailed === null) {\n    legacyErrorBoundariesThatAlreadyFailed = new Set([instance]);\n  } else {\n    legacyErrorBoundariesThatAlreadyFailed.add(instance);\n  }\n}\n\nfunction prepareToThrowUncaughtError(error) {\n  if (!hasUncaughtError) {\n    hasUncaughtError = true;\n    firstUncaughtError = error;\n  }\n}\n\nvar onUncaughtError = prepareToThrowUncaughtError;\n\nfunction captureCommitPhaseErrorOnRoot(rootFiber, sourceFiber, error) {\n  var errorInfo = createCapturedValue(error, sourceFiber);\n  var update = createRootErrorUpdate(rootFiber, errorInfo, SyncLane);\n  enqueueUpdate(rootFiber, update);\n  var eventTime = requestEventTime();\n  var root = markUpdateLaneFromFiberToRoot(rootFiber, SyncLane);\n\n  if (root !== null) {\n    markRootUpdated(root, SyncLane, eventTime);\n    ensureRootIsScheduled(root, eventTime);\n    schedulePendingInteractions(root, SyncLane);\n  }\n}\n\nfunction captureCommitPhaseError(sourceFiber, error) {\n  if (sourceFiber.tag === HostRoot) {\n    // Error was thrown at the root. There is no parent, so the root\n    // itself should capture it.\n    captureCommitPhaseErrorOnRoot(sourceFiber, sourceFiber, error);\n    return;\n  }\n\n  var fiber = sourceFiber.return;\n\n  while (fiber !== null) {\n    if (fiber.tag === HostRoot) {\n      captureCommitPhaseErrorOnRoot(fiber, sourceFiber, error);\n      return;\n    } else if (fiber.tag === ClassComponent) {\n      var ctor = fiber.type;\n      var instance = fiber.stateNode;\n\n      if (typeof ctor.getDerivedStateFromError === 'function' || typeof instance.componentDidCatch === 'function' && !isAlreadyFailedLegacyErrorBoundary(instance)) {\n        var errorInfo = createCapturedValue(error, sourceFiber);\n        var update = createClassErrorUpdate(fiber, errorInfo, SyncLane);\n        enqueueUpdate(fiber, update);\n        var eventTime = requestEventTime();\n        var root = markUpdateLaneFromFiberToRoot(fiber, SyncLane);\n\n        if (root !== null) {\n          markRootUpdated(root, SyncLane, eventTime);\n          ensureRootIsScheduled(root, eventTime);\n          schedulePendingInteractions(root, SyncLane);\n        } else {\n          // This component has already been unmounted.\n          // We can't schedule any follow up work for the root because the fiber is already unmounted,\n          // but we can still call the log-only boundary so the error isn't swallowed.\n          //\n          // TODO This is only a temporary bandaid for the old reconciler fork.\n          // We can delete this special case once the new fork is merged.\n          if (typeof instance.componentDidCatch === 'function' && !isAlreadyFailedLegacyErrorBoundary(instance)) {\n            try {\n              instance.componentDidCatch(error, errorInfo);\n            } catch (errorToIgnore) {// TODO Ignore this error? Rethrow it?\n              // This is kind of an edge case.\n            }\n          }\n        }\n\n        return;\n      }\n    }\n\n    fiber = fiber.return;\n  }\n}\nfunction pingSuspendedRoot(root, wakeable, pingedLanes) {\n  var pingCache = root.pingCache;\n\n  if (pingCache !== null) {\n    // The wakeable resolved, so we no longer need to memoize, because it will\n    // never be thrown again.\n    pingCache.delete(wakeable);\n  }\n\n  var eventTime = requestEventTime();\n  markRootPinged(root, pingedLanes);\n\n  if (workInProgressRoot === root && isSubsetOfLanes(workInProgressRootRenderLanes, pingedLanes)) {\n    // Received a ping at the same priority level at which we're currently\n    // rendering. We might want to restart this render. This should mirror\n    // the logic of whether or not a root suspends once it completes.\n    // TODO: If we're rendering sync either due to Sync, Batched or expired,\n    // we should probably never restart.\n    // If we're suspended with delay, or if it's a retry, we'll always suspend\n    // so we can always restart.\n    if (workInProgressRootExitStatus === RootSuspendedWithDelay || workInProgressRootExitStatus === RootSuspended && includesOnlyRetries(workInProgressRootRenderLanes) && now() - globalMostRecentFallbackTime < FALLBACK_THROTTLE_MS) {\n      // Restart from the root.\n      prepareFreshStack(root, NoLanes);\n    } else {\n      // Even though we can't restart right now, we might get an\n      // opportunity later. So we mark this render as having a ping.\n      workInProgressRootPingedLanes = mergeLanes(workInProgressRootPingedLanes, pingedLanes);\n    }\n  }\n\n  ensureRootIsScheduled(root, eventTime);\n  schedulePendingInteractions(root, pingedLanes);\n}\n\nfunction retryTimedOutBoundary(boundaryFiber, retryLane) {\n  // The boundary fiber (a Suspense component or SuspenseList component)\n  // previously was rendered in its fallback state. One of the promises that\n  // suspended it has resolved, which means at least part of the tree was\n  // likely unblocked. Try rendering again, at a new expiration time.\n  if (retryLane === NoLane) {\n    retryLane = requestRetryLane(boundaryFiber);\n  } // TODO: Special case idle priority?\n\n\n  var eventTime = requestEventTime();\n  var root = markUpdateLaneFromFiberToRoot(boundaryFiber, retryLane);\n\n  if (root !== null) {\n    markRootUpdated(root, retryLane, eventTime);\n    ensureRootIsScheduled(root, eventTime);\n    schedulePendingInteractions(root, retryLane);\n  }\n}\nfunction resolveRetryWakeable(boundaryFiber, wakeable) {\n  var retryLane = NoLane; // Default\n\n  var retryCache;\n\n  {\n    retryCache = boundaryFiber.stateNode;\n  }\n\n  if (retryCache !== null) {\n    // The wakeable resolved, so we no longer need to memoize, because it will\n    // never be thrown again.\n    retryCache.delete(wakeable);\n  }\n\n  retryTimedOutBoundary(boundaryFiber, retryLane);\n} // Computes the next Just Noticeable Difference (JND) boundary.\n// The theory is that a person can't tell the difference between small differences in time.\n// Therefore, if we wait a bit longer than necessary that won't translate to a noticeable\n// difference in the experience. However, waiting for longer might mean that we can avoid\n// showing an intermediate loading state. The longer we have already waited, the harder it\n// is to tell small differences in time. Therefore, the longer we've already waited,\n// the longer we can wait additionally. At some point we have to give up though.\n// We pick a train model where the next boundary commits at a consistent schedule.\n// These particular numbers are vague estimates. We expect to adjust them based on research.\n\nfunction jnd(timeElapsed) {\n  return timeElapsed < 120 ? 120 : timeElapsed < 480 ? 480 : timeElapsed < 1080 ? 1080 : timeElapsed < 1920 ? 1920 : timeElapsed < 3000 ? 3000 : timeElapsed < 4320 ? 4320 : ceil(timeElapsed / 1960) * 1960;\n}\n\nfunction checkForNestedUpdates() {\n  if (nestedUpdateCount > NESTED_UPDATE_LIMIT) {\n    nestedUpdateCount = 0;\n    rootWithNestedUpdates = null;\n\n    {\n      {\n        throw Error( \"Maximum update depth exceeded. This can happen when a component repeatedly calls setState inside componentWillUpdate or componentDidUpdate. React limits the number of nested updates to prevent infinite loops.\" );\n      }\n    }\n  }\n\n  {\n    if (nestedPassiveUpdateCount > NESTED_PASSIVE_UPDATE_LIMIT) {\n      nestedPassiveUpdateCount = 0;\n\n      error('Maximum update depth exceeded. This can happen when a component ' + \"calls setState inside useEffect, but useEffect either doesn't \" + 'have a dependency array, or one of the dependencies changes on ' + 'every render.');\n    }\n  }\n}\n\nfunction flushRenderPhaseStrictModeWarningsInDEV() {\n  {\n    ReactStrictModeWarnings.flushLegacyContextWarning();\n\n    {\n      ReactStrictModeWarnings.flushPendingUnsafeLifecycleWarnings();\n    }\n  }\n}\n\nvar didWarnStateUpdateForNotYetMountedComponent = null;\n\nfunction warnAboutUpdateOnNotYetMountedFiberInDEV(fiber) {\n  {\n    if ((executionContext & RenderContext) !== NoContext) {\n      // We let the other warning about render phase updates deal with this one.\n      return;\n    }\n\n    if (!(fiber.mode & (BlockingMode | ConcurrentMode))) {\n      return;\n    }\n\n    var tag = fiber.tag;\n\n    if (tag !== IndeterminateComponent && tag !== HostRoot && tag !== ClassComponent && tag !== FunctionComponent && tag !== ForwardRef && tag !== MemoComponent && tag !== SimpleMemoComponent && tag !== Block) {\n      // Only warn for user-defined components, not internal ones like Suspense.\n      return;\n    } // We show the whole stack but dedupe on the top component's name because\n    // the problematic code almost always lies inside that component.\n\n\n    var componentName = getComponentName(fiber.type) || 'ReactComponent';\n\n    if (didWarnStateUpdateForNotYetMountedComponent !== null) {\n      if (didWarnStateUpdateForNotYetMountedComponent.has(componentName)) {\n        return;\n      }\n\n      didWarnStateUpdateForNotYetMountedComponent.add(componentName);\n    } else {\n      didWarnStateUpdateForNotYetMountedComponent = new Set([componentName]);\n    }\n\n    var previousFiber = current;\n\n    try {\n      setCurrentFiber(fiber);\n\n      error(\"Can't perform a React state update on a component that hasn't mounted yet. \" + 'This indicates that you have a side-effect in your render function that ' + 'asynchronously later calls tries to update the component. Move this work to ' + 'useEffect instead.');\n    } finally {\n      if (previousFiber) {\n        setCurrentFiber(fiber);\n      } else {\n        resetCurrentFiber();\n      }\n    }\n  }\n}\n\nvar didWarnStateUpdateForUnmountedComponent = null;\n\nfunction warnAboutUpdateOnUnmountedFiberInDEV(fiber) {\n  {\n    var tag = fiber.tag;\n\n    if (tag !== HostRoot && tag !== ClassComponent && tag !== FunctionComponent && tag !== ForwardRef && tag !== MemoComponent && tag !== SimpleMemoComponent && tag !== Block) {\n      // Only warn for user-defined components, not internal ones like Suspense.\n      return;\n    } // If there are pending passive effects unmounts for this Fiber,\n    // we can assume that they would have prevented this update.\n\n\n    if ((fiber.flags & PassiveUnmountPendingDev) !== NoFlags) {\n      return;\n    } // We show the whole stack but dedupe on the top component's name because\n    // the problematic code almost always lies inside that component.\n\n\n    var componentName = getComponentName(fiber.type) || 'ReactComponent';\n\n    if (didWarnStateUpdateForUnmountedComponent !== null) {\n      if (didWarnStateUpdateForUnmountedComponent.has(componentName)) {\n        return;\n      }\n\n      didWarnStateUpdateForUnmountedComponent.add(componentName);\n    } else {\n      didWarnStateUpdateForUnmountedComponent = new Set([componentName]);\n    }\n\n    if (isFlushingPassiveEffects) ; else {\n      var previousFiber = current;\n\n      try {\n        setCurrentFiber(fiber);\n\n        error(\"Can't perform a React state update on an unmounted component. This \" + 'is a no-op, but it indicates a memory leak in your application. To ' + 'fix, cancel all subscriptions and asynchronous tasks in %s.', tag === ClassComponent ? 'the componentWillUnmount method' : 'a useEffect cleanup function');\n      } finally {\n        if (previousFiber) {\n          setCurrentFiber(fiber);\n        } else {\n          resetCurrentFiber();\n        }\n      }\n    }\n  }\n}\n\nvar beginWork$1;\n\n{\n  var dummyFiber = null;\n\n  beginWork$1 = function (current, unitOfWork, lanes) {\n    // If a component throws an error, we replay it again in a synchronously\n    // dispatched event, so that the debugger will treat it as an uncaught\n    // error See ReactErrorUtils for more information.\n    // Before entering the begin phase, copy the work-in-progress onto a dummy\n    // fiber. If beginWork throws, we'll use this to reset the state.\n    var originalWorkInProgressCopy = assignFiberPropertiesInDEV(dummyFiber, unitOfWork);\n\n    try {\n      return beginWork(current, unitOfWork, lanes);\n    } catch (originalError) {\n      if (originalError !== null && typeof originalError === 'object' && typeof originalError.then === 'function') {\n        // Don't replay promises. Treat everything else like an error.\n        throw originalError;\n      } // Keep this code in sync with handleError; any changes here must have\n      // corresponding changes there.\n\n\n      resetContextDependencies();\n      resetHooksAfterThrow(); // Don't reset current debug fiber, since we're about to work on the\n      // same fiber again.\n      // Unwind the failed stack frame\n\n      unwindInterruptedWork(unitOfWork); // Restore the original properties of the fiber.\n\n      assignFiberPropertiesInDEV(unitOfWork, originalWorkInProgressCopy);\n\n      if ( unitOfWork.mode & ProfileMode) {\n        // Reset the profiler timer.\n        startProfilerTimer(unitOfWork);\n      } // Run beginWork again.\n\n\n      invokeGuardedCallback(null, beginWork, null, current, unitOfWork, lanes);\n\n      if (hasCaughtError()) {\n        var replayError = clearCaughtError(); // `invokeGuardedCallback` sometimes sets an expando `_suppressLogging`.\n        // Rethrow this error instead of the original one.\n\n        throw replayError;\n      } else {\n        // This branch is reachable if the render phase is impure.\n        throw originalError;\n      }\n    }\n  };\n}\n\nvar didWarnAboutUpdateInRender = false;\nvar didWarnAboutUpdateInRenderForAnotherComponent;\n\n{\n  didWarnAboutUpdateInRenderForAnotherComponent = new Set();\n}\n\nfunction warnAboutRenderPhaseUpdatesInDEV(fiber) {\n  {\n    if (isRendering && (executionContext & RenderContext) !== NoContext && !getIsUpdatingOpaqueValueInRenderPhaseInDEV()) {\n      switch (fiber.tag) {\n        case FunctionComponent:\n        case ForwardRef:\n        case SimpleMemoComponent:\n          {\n            var renderingComponentName = workInProgress && getComponentName(workInProgress.type) || 'Unknown'; // Dedupe by the rendering component because it's the one that needs to be fixed.\n\n            var dedupeKey = renderingComponentName;\n\n            if (!didWarnAboutUpdateInRenderForAnotherComponent.has(dedupeKey)) {\n              didWarnAboutUpdateInRenderForAnotherComponent.add(dedupeKey);\n              var setStateComponentName = getComponentName(fiber.type) || 'Unknown';\n\n              error('Cannot update a component (`%s`) while rendering a ' + 'different component (`%s`). To locate the bad setState() call inside `%s`, ' + 'follow the stack trace as described in https://reactjs.org/link/setstate-in-render', setStateComponentName, renderingComponentName, renderingComponentName);\n            }\n\n            break;\n          }\n\n        case ClassComponent:\n          {\n            if (!didWarnAboutUpdateInRender) {\n              error('Cannot update during an existing state transition (such as ' + 'within `render`). Render methods should be a pure ' + 'function of props and state.');\n\n              didWarnAboutUpdateInRender = true;\n            }\n\n            break;\n          }\n      }\n    }\n  }\n} // a 'shared' variable that changes when act() opens/closes in tests.\n\n\nvar IsThisRendererActing = {\n  current: false\n};\nfunction warnIfNotScopedWithMatchingAct(fiber) {\n  {\n    if ( IsSomeRendererActing.current === true && IsThisRendererActing.current !== true) {\n      var previousFiber = current;\n\n      try {\n        setCurrentFiber(fiber);\n\n        error(\"It looks like you're using the wrong act() around your test interactions.\\n\" + 'Be sure to use the matching version of act() corresponding to your renderer:\\n\\n' + '// for react-dom:\\n' + // Break up imports to avoid accidentally parsing them as dependencies.\n        'import {act} fr' + \"om 'react-dom/test-utils';\\n\" + '// ...\\n' + 'act(() => ...);\\n\\n' + '// for react-test-renderer:\\n' + // Break up imports to avoid accidentally parsing them as dependencies.\n        'import TestRenderer fr' + \"om react-test-renderer';\\n\" + 'const {act} = TestRenderer;\\n' + '// ...\\n' + 'act(() => ...);');\n      } finally {\n        if (previousFiber) {\n          setCurrentFiber(fiber);\n        } else {\n          resetCurrentFiber();\n        }\n      }\n    }\n  }\n}\nfunction warnIfNotCurrentlyActingEffectsInDEV(fiber) {\n  {\n    if ( (fiber.mode & StrictMode) !== NoMode && IsSomeRendererActing.current === false && IsThisRendererActing.current === false) {\n      error('An update to %s ran an effect, but was not wrapped in act(...).\\n\\n' + 'When testing, code that causes React state updates should be ' + 'wrapped into act(...):\\n\\n' + 'act(() => {\\n' + '  /* fire events that update state */\\n' + '});\\n' + '/* assert on the output */\\n\\n' + \"This ensures that you're testing the behavior the user would see \" + 'in the browser.' + ' Learn more at https://reactjs.org/link/wrap-tests-with-act', getComponentName(fiber.type));\n    }\n  }\n}\n\nfunction warnIfNotCurrentlyActingUpdatesInDEV(fiber) {\n  {\n    if ( executionContext === NoContext && IsSomeRendererActing.current === false && IsThisRendererActing.current === false) {\n      var previousFiber = current;\n\n      try {\n        setCurrentFiber(fiber);\n\n        error('An update to %s inside a test was not wrapped in act(...).\\n\\n' + 'When testing, code that causes React state updates should be ' + 'wrapped into act(...):\\n\\n' + 'act(() => {\\n' + '  /* fire events that update state */\\n' + '});\\n' + '/* assert on the output */\\n\\n' + \"This ensures that you're testing the behavior the user would see \" + 'in the browser.' + ' Learn more at https://reactjs.org/link/wrap-tests-with-act', getComponentName(fiber.type));\n      } finally {\n        if (previousFiber) {\n          setCurrentFiber(fiber);\n        } else {\n          resetCurrentFiber();\n        }\n      }\n    }\n  }\n}\n\nvar warnIfNotCurrentlyActingUpdatesInDev = warnIfNotCurrentlyActingUpdatesInDEV; // In tests, we want to enforce a mocked scheduler.\n\nvar didWarnAboutUnmockedScheduler = false; // TODO Before we release concurrent mode, revisit this and decide whether a mocked\n// scheduler is the actual recommendation. The alternative could be a testing build,\n// a new lib, or whatever; we dunno just yet. This message is for early adopters\n// to get their tests right.\n\nfunction warnIfUnmockedScheduler(fiber) {\n  {\n    if (didWarnAboutUnmockedScheduler === false && Scheduler.unstable_flushAllWithoutAsserting === undefined) {\n      if (fiber.mode & BlockingMode || fiber.mode & ConcurrentMode) {\n        didWarnAboutUnmockedScheduler = true;\n\n        error('In Concurrent or Sync modes, the \"scheduler\" module needs to be mocked ' + 'to guarantee consistent behaviour across tests and browsers. ' + 'For example, with jest: \\n' + // Break up requires to avoid accidentally parsing them as dependencies.\n        \"jest.mock('scheduler', () => require\" + \"('scheduler/unstable_mock'));\\n\\n\" + 'For more info, visit https://reactjs.org/link/mock-scheduler');\n      }\n    }\n  }\n}\n\nfunction computeThreadID(root, lane) {\n  // Interaction threads are unique per root and expiration time.\n  // NOTE: Intentionally unsound cast. All that matters is that it's a number\n  // and it represents a batch of work. Could make a helper function instead,\n  // but meh this is fine for now.\n  return lane * 1000 + root.interactionThreadID;\n}\n\nfunction markSpawnedWork(lane) {\n\n  if (spawnedWorkDuringRender === null) {\n    spawnedWorkDuringRender = [lane];\n  } else {\n    spawnedWorkDuringRender.push(lane);\n  }\n}\n\nfunction scheduleInteractions(root, lane, interactions) {\n\n  if (interactions.size > 0) {\n    var pendingInteractionMap = root.pendingInteractionMap;\n    var pendingInteractions = pendingInteractionMap.get(lane);\n\n    if (pendingInteractions != null) {\n      interactions.forEach(function (interaction) {\n        if (!pendingInteractions.has(interaction)) {\n          // Update the pending async work count for previously unscheduled interaction.\n          interaction.__count++;\n        }\n\n        pendingInteractions.add(interaction);\n      });\n    } else {\n      pendingInteractionMap.set(lane, new Set(interactions)); // Update the pending async work count for the current interactions.\n\n      interactions.forEach(function (interaction) {\n        interaction.__count++;\n      });\n    }\n\n    var subscriber = tracing.__subscriberRef.current;\n\n    if (subscriber !== null) {\n      var threadID = computeThreadID(root, lane);\n      subscriber.onWorkScheduled(interactions, threadID);\n    }\n  }\n}\n\nfunction schedulePendingInteractions(root, lane) {\n\n  scheduleInteractions(root, lane, tracing.__interactionsRef.current);\n}\n\nfunction startWorkOnPendingInteractions(root, lanes) {\n  // we can accurately attribute time spent working on it, And so that cascading\n  // work triggered during the render phase will be associated with it.\n\n\n  var interactions = new Set();\n  root.pendingInteractionMap.forEach(function (scheduledInteractions, scheduledLane) {\n    if (includesSomeLane(lanes, scheduledLane)) {\n      scheduledInteractions.forEach(function (interaction) {\n        return interactions.add(interaction);\n      });\n    }\n  }); // Store the current set of interactions on the FiberRoot for a few reasons:\n  // We can re-use it in hot functions like performConcurrentWorkOnRoot()\n  // without having to recalculate it. We will also use it in commitWork() to\n  // pass to any Profiler onRender() hooks. This also provides DevTools with a\n  // way to access it when the onCommitRoot() hook is called.\n\n  root.memoizedInteractions = interactions;\n\n  if (interactions.size > 0) {\n    var subscriber = tracing.__subscriberRef.current;\n\n    if (subscriber !== null) {\n      var threadID = computeThreadID(root, lanes);\n\n      try {\n        subscriber.onWorkStarted(interactions, threadID);\n      } catch (error) {\n        // If the subscriber throws, rethrow it in a separate task\n        scheduleCallback(ImmediatePriority$1, function () {\n          throw error;\n        });\n      }\n    }\n  }\n}\n\nfunction finishPendingInteractions(root, committedLanes) {\n\n  var remainingLanesAfterCommit = root.pendingLanes;\n  var subscriber;\n\n  try {\n    subscriber = tracing.__subscriberRef.current;\n\n    if (subscriber !== null && root.memoizedInteractions.size > 0) {\n      // FIXME: More than one lane can finish in a single commit.\n      var threadID = computeThreadID(root, committedLanes);\n      subscriber.onWorkStopped(root.memoizedInteractions, threadID);\n    }\n  } catch (error) {\n    // If the subscriber throws, rethrow it in a separate task\n    scheduleCallback(ImmediatePriority$1, function () {\n      throw error;\n    });\n  } finally {\n    // Clear completed interactions from the pending Map.\n    // Unless the render was suspended or cascading work was scheduled,\n    // In which case– leave pending interactions until the subsequent render.\n    var pendingInteractionMap = root.pendingInteractionMap;\n    pendingInteractionMap.forEach(function (scheduledInteractions, lane) {\n      // Only decrement the pending interaction count if we're done.\n      // If there's still work at the current priority,\n      // That indicates that we are waiting for suspense data.\n      if (!includesSomeLane(remainingLanesAfterCommit, lane)) {\n        pendingInteractionMap.delete(lane);\n        scheduledInteractions.forEach(function (interaction) {\n          interaction.__count--;\n\n          if (subscriber !== null && interaction.__count === 0) {\n            try {\n              subscriber.onInteractionScheduledWorkCompleted(interaction);\n            } catch (error) {\n              // If the subscriber throws, rethrow it in a separate task\n              scheduleCallback(ImmediatePriority$1, function () {\n                throw error;\n              });\n            }\n          }\n        });\n      }\n    });\n  }\n} // `act` testing API\n\nfunction shouldForceFlushFallbacksInDEV() {\n  // Never force flush in production. This function should get stripped out.\n  return  actingUpdatesScopeDepth > 0;\n}\n// so we can tell if any async act() calls try to run in parallel.\n\n\nvar actingUpdatesScopeDepth = 0;\n\nfunction detachFiberAfterEffects(fiber) {\n  fiber.sibling = null;\n  fiber.stateNode = null;\n}\n\nvar resolveFamily = null; // $FlowFixMe Flow gets confused by a WeakSet feature check below.\n\nvar failedBoundaries = null;\nvar setRefreshHandler = function (handler) {\n  {\n    resolveFamily = handler;\n  }\n};\nfunction resolveFunctionForHotReloading(type) {\n  {\n    if (resolveFamily === null) {\n      // Hot reloading is disabled.\n      return type;\n    }\n\n    var family = resolveFamily(type);\n\n    if (family === undefined) {\n      return type;\n    } // Use the latest known implementation.\n\n\n    return family.current;\n  }\n}\nfunction resolveClassForHotReloading(type) {\n  // No implementation differences.\n  return resolveFunctionForHotReloading(type);\n}\nfunction resolveForwardRefForHotReloading(type) {\n  {\n    if (resolveFamily === null) {\n      // Hot reloading is disabled.\n      return type;\n    }\n\n    var family = resolveFamily(type);\n\n    if (family === undefined) {\n      // Check if we're dealing with a real forwardRef. Don't want to crash early.\n      if (type !== null && type !== undefined && typeof type.render === 'function') {\n        // ForwardRef is special because its resolved .type is an object,\n        // but it's possible that we only have its inner render function in the map.\n        // If that inner render function is different, we'll build a new forwardRef type.\n        var currentRender = resolveFunctionForHotReloading(type.render);\n\n        if (type.render !== currentRender) {\n          var syntheticType = {\n            $$typeof: REACT_FORWARD_REF_TYPE,\n            render: currentRender\n          };\n\n          if (type.displayName !== undefined) {\n            syntheticType.displayName = type.displayName;\n          }\n\n          return syntheticType;\n        }\n      }\n\n      return type;\n    } // Use the latest known implementation.\n\n\n    return family.current;\n  }\n}\nfunction isCompatibleFamilyForHotReloading(fiber, element) {\n  {\n    if (resolveFamily === null) {\n      // Hot reloading is disabled.\n      return false;\n    }\n\n    var prevType = fiber.elementType;\n    var nextType = element.type; // If we got here, we know types aren't === equal.\n\n    var needsCompareFamilies = false;\n    var $$typeofNextType = typeof nextType === 'object' && nextType !== null ? nextType.$$typeof : null;\n\n    switch (fiber.tag) {\n      case ClassComponent:\n        {\n          if (typeof nextType === 'function') {\n            needsCompareFamilies = true;\n          }\n\n          break;\n        }\n\n      case FunctionComponent:\n        {\n          if (typeof nextType === 'function') {\n            needsCompareFamilies = true;\n          } else if ($$typeofNextType === REACT_LAZY_TYPE) {\n            // We don't know the inner type yet.\n            // We're going to assume that the lazy inner type is stable,\n            // and so it is sufficient to avoid reconciling it away.\n            // We're not going to unwrap or actually use the new lazy type.\n            needsCompareFamilies = true;\n          }\n\n          break;\n        }\n\n      case ForwardRef:\n        {\n          if ($$typeofNextType === REACT_FORWARD_REF_TYPE) {\n            needsCompareFamilies = true;\n          } else if ($$typeofNextType === REACT_LAZY_TYPE) {\n            needsCompareFamilies = true;\n          }\n\n          break;\n        }\n\n      case MemoComponent:\n      case SimpleMemoComponent:\n        {\n          if ($$typeofNextType === REACT_MEMO_TYPE) {\n            // TODO: if it was but can no longer be simple,\n            // we shouldn't set this.\n            needsCompareFamilies = true;\n          } else if ($$typeofNextType === REACT_LAZY_TYPE) {\n            needsCompareFamilies = true;\n          }\n\n          break;\n        }\n\n      default:\n        return false;\n    } // Check if both types have a family and it's the same one.\n\n\n    if (needsCompareFamilies) {\n      // Note: memo() and forwardRef() we'll compare outer rather than inner type.\n      // This means both of them need to be registered to preserve state.\n      // If we unwrapped and compared the inner types for wrappers instead,\n      // then we would risk falsely saying two separate memo(Foo)\n      // calls are equivalent because they wrap the same Foo function.\n      var prevFamily = resolveFamily(prevType);\n\n      if (prevFamily !== undefined && prevFamily === resolveFamily(nextType)) {\n        return true;\n      }\n    }\n\n    return false;\n  }\n}\nfunction markFailedErrorBoundaryForHotReloading(fiber) {\n  {\n    if (resolveFamily === null) {\n      // Hot reloading is disabled.\n      return;\n    }\n\n    if (typeof WeakSet !== 'function') {\n      return;\n    }\n\n    if (failedBoundaries === null) {\n      failedBoundaries = new WeakSet();\n    }\n\n    failedBoundaries.add(fiber);\n  }\n}\nvar scheduleRefresh = function (root, update) {\n  {\n    if (resolveFamily === null) {\n      // Hot reloading is disabled.\n      return;\n    }\n\n    var staleFamilies = update.staleFamilies,\n        updatedFamilies = update.updatedFamilies;\n    flushPassiveEffects();\n    flushSync(function () {\n      scheduleFibersWithFamiliesRecursively(root.current, updatedFamilies, staleFamilies);\n    });\n  }\n};\nvar scheduleRoot = function (root, element) {\n  {\n    if (root.context !== emptyContextObject) {\n      // Super edge case: root has a legacy _renderSubtree context\n      // but we don't know the parentComponent so we can't pass it.\n      // Just ignore. We'll delete this with _renderSubtree code path later.\n      return;\n    }\n\n    flushPassiveEffects();\n    flushSync(function () {\n      updateContainer(element, root, null, null);\n    });\n  }\n};\n\nfunction scheduleFibersWithFamiliesRecursively(fiber, updatedFamilies, staleFamilies) {\n  {\n    var alternate = fiber.alternate,\n        child = fiber.child,\n        sibling = fiber.sibling,\n        tag = fiber.tag,\n        type = fiber.type;\n    var candidateType = null;\n\n    switch (tag) {\n      case FunctionComponent:\n      case SimpleMemoComponent:\n      case ClassComponent:\n        candidateType = type;\n        break;\n\n      case ForwardRef:\n        candidateType = type.render;\n        break;\n    }\n\n    if (resolveFamily === null) {\n      throw new Error('Expected resolveFamily to be set during hot reload.');\n    }\n\n    var needsRender = false;\n    var needsRemount = false;\n\n    if (candidateType !== null) {\n      var family = resolveFamily(candidateType);\n\n      if (family !== undefined) {\n        if (staleFamilies.has(family)) {\n          needsRemount = true;\n        } else if (updatedFamilies.has(family)) {\n          if (tag === ClassComponent) {\n            needsRemount = true;\n          } else {\n            needsRender = true;\n          }\n        }\n      }\n    }\n\n    if (failedBoundaries !== null) {\n      if (failedBoundaries.has(fiber) || alternate !== null && failedBoundaries.has(alternate)) {\n        needsRemount = true;\n      }\n    }\n\n    if (needsRemount) {\n      fiber._debugNeedsRemount = true;\n    }\n\n    if (needsRemount || needsRender) {\n      scheduleUpdateOnFiber(fiber, SyncLane, NoTimestamp);\n    }\n\n    if (child !== null && !needsRemount) {\n      scheduleFibersWithFamiliesRecursively(child, updatedFamilies, staleFamilies);\n    }\n\n    if (sibling !== null) {\n      scheduleFibersWithFamiliesRecursively(sibling, updatedFamilies, staleFamilies);\n    }\n  }\n}\n\nvar findHostInstancesForRefresh = function (root, families) {\n  {\n    var hostInstances = new Set();\n    var types = new Set(families.map(function (family) {\n      return family.current;\n    }));\n    findHostInstancesForMatchingFibersRecursively(root.current, types, hostInstances);\n    return hostInstances;\n  }\n};\n\nfunction findHostInstancesForMatchingFibersRecursively(fiber, types, hostInstances) {\n  {\n    var child = fiber.child,\n        sibling = fiber.sibling,\n        tag = fiber.tag,\n        type = fiber.type;\n    var candidateType = null;\n\n    switch (tag) {\n      case FunctionComponent:\n      case SimpleMemoComponent:\n      case ClassComponent:\n        candidateType = type;\n        break;\n\n      case ForwardRef:\n        candidateType = type.render;\n        break;\n    }\n\n    var didMatch = false;\n\n    if (candidateType !== null) {\n      if (types.has(candidateType)) {\n        didMatch = true;\n      }\n    }\n\n    if (didMatch) {\n      // We have a match. This only drills down to the closest host components.\n      // There's no need to search deeper because for the purpose of giving\n      // visual feedback, \"flashing\" outermost parent rectangles is sufficient.\n      findHostInstancesForFiberShallowly(fiber, hostInstances);\n    } else {\n      // If there's no match, maybe there will be one further down in the child tree.\n      if (child !== null) {\n        findHostInstancesForMatchingFibersRecursively(child, types, hostInstances);\n      }\n    }\n\n    if (sibling !== null) {\n      findHostInstancesForMatchingFibersRecursively(sibling, types, hostInstances);\n    }\n  }\n}\n\nfunction findHostInstancesForFiberShallowly(fiber, hostInstances) {\n  {\n    var foundHostInstances = findChildHostInstancesForFiberShallowly(fiber, hostInstances);\n\n    if (foundHostInstances) {\n      return;\n    } // If we didn't find any host children, fallback to closest host parent.\n\n\n    var node = fiber;\n\n    while (true) {\n      switch (node.tag) {\n        case HostComponent:\n          hostInstances.add(node.stateNode);\n          return;\n\n        case HostPortal:\n          hostInstances.add(node.stateNode.containerInfo);\n          return;\n\n        case HostRoot:\n          hostInstances.add(node.stateNode.containerInfo);\n          return;\n      }\n\n      if (node.return === null) {\n        throw new Error('Expected to reach root first.');\n      }\n\n      node = node.return;\n    }\n  }\n}\n\nfunction findChildHostInstancesForFiberShallowly(fiber, hostInstances) {\n  {\n    var node = fiber;\n    var foundHostInstances = false;\n\n    while (true) {\n      if (node.tag === HostComponent) {\n        // We got a match.\n        foundHostInstances = true;\n        hostInstances.add(node.stateNode); // There may still be more, so keep searching.\n      } else if (node.child !== null) {\n        node.child.return = node;\n        node = node.child;\n        continue;\n      }\n\n      if (node === fiber) {\n        return foundHostInstances;\n      }\n\n      while (node.sibling === null) {\n        if (node.return === null || node.return === fiber) {\n          return foundHostInstances;\n        }\n\n        node = node.return;\n      }\n\n      node.sibling.return = node.return;\n      node = node.sibling;\n    }\n  }\n\n  return false;\n}\n\nvar hasBadMapPolyfill;\n\n{\n  hasBadMapPolyfill = false;\n\n  try {\n    var nonExtensibleObject = Object.preventExtensions({});\n    /* eslint-disable no-new */\n\n    new Map([[nonExtensibleObject, null]]);\n    new Set([nonExtensibleObject]);\n    /* eslint-enable no-new */\n  } catch (e) {\n    // TODO: Consider warning about bad polyfills\n    hasBadMapPolyfill = true;\n  }\n}\n\nvar debugCounter = 1;\n\nfunction FiberNode(tag, pendingProps, key, mode) {\n  // Instance\n  this.tag = tag;\n  this.key = key;\n  this.elementType = null;\n  this.type = null;\n  this.stateNode = null; // Fiber\n\n  this.return = null;\n  this.child = null;\n  this.sibling = null;\n  this.index = 0;\n  this.ref = null;\n  this.pendingProps = pendingProps;\n  this.memoizedProps = null;\n  this.updateQueue = null;\n  this.memoizedState = null;\n  this.dependencies = null;\n  this.mode = mode; // Effects\n\n  this.flags = NoFlags;\n  this.nextEffect = null;\n  this.firstEffect = null;\n  this.lastEffect = null;\n  this.lanes = NoLanes;\n  this.childLanes = NoLanes;\n  this.alternate = null;\n\n  {\n    // Note: The following is done to avoid a v8 performance cliff.\n    //\n    // Initializing the fields below to smis and later updating them with\n    // double values will cause Fibers to end up having separate shapes.\n    // This behavior/bug has something to do with Object.preventExtension().\n    // Fortunately this only impacts DEV builds.\n    // Unfortunately it makes React unusably slow for some applications.\n    // To work around this, initialize the fields below with doubles.\n    //\n    // Learn more about this here:\n    // https://github.com/facebook/react/issues/14365\n    // https://bugs.chromium.org/p/v8/issues/detail?id=8538\n    this.actualDuration = Number.NaN;\n    this.actualStartTime = Number.NaN;\n    this.selfBaseDuration = Number.NaN;\n    this.treeBaseDuration = Number.NaN; // It's okay to replace the initial doubles with smis after initialization.\n    // This won't trigger the performance cliff mentioned above,\n    // and it simplifies other profiler code (including DevTools).\n\n    this.actualDuration = 0;\n    this.actualStartTime = -1;\n    this.selfBaseDuration = 0;\n    this.treeBaseDuration = 0;\n  }\n\n  {\n    // This isn't directly used but is handy for debugging internals:\n    this._debugID = debugCounter++;\n    this._debugSource = null;\n    this._debugOwner = null;\n    this._debugNeedsRemount = false;\n    this._debugHookTypes = null;\n\n    if (!hasBadMapPolyfill && typeof Object.preventExtensions === 'function') {\n      Object.preventExtensions(this);\n    }\n  }\n} // This is a constructor function, rather than a POJO constructor, still\n// please ensure we do the following:\n// 1) Nobody should add any instance methods on this. Instance methods can be\n//    more difficult to predict when they get optimized and they are almost\n//    never inlined properly in static compilers.\n// 2) Nobody should rely on `instanceof Fiber` for type testing. We should\n//    always know when it is a fiber.\n// 3) We might want to experiment with using numeric keys since they are easier\n//    to optimize in a non-JIT environment.\n// 4) We can easily go from a constructor to a createFiber object literal if that\n//    is faster.\n// 5) It should be easy to port this to a C struct and keep a C implementation\n//    compatible.\n\n\nvar createFiber = function (tag, pendingProps, key, mode) {\n  // $FlowFixMe: the shapes are exact here but Flow doesn't like constructors\n  return new FiberNode(tag, pendingProps, key, mode);\n};\n\nfunction shouldConstruct$1(Component) {\n  var prototype = Component.prototype;\n  return !!(prototype && prototype.isReactComponent);\n}\n\nfunction isSimpleFunctionComponent(type) {\n  return typeof type === 'function' && !shouldConstruct$1(type) && type.defaultProps === undefined;\n}\nfunction resolveLazyComponentTag(Component) {\n  if (typeof Component === 'function') {\n    return shouldConstruct$1(Component) ? ClassComponent : FunctionComponent;\n  } else if (Component !== undefined && Component !== null) {\n    var $$typeof = Component.$$typeof;\n\n    if ($$typeof === REACT_FORWARD_REF_TYPE) {\n      return ForwardRef;\n    }\n\n    if ($$typeof === REACT_MEMO_TYPE) {\n      return MemoComponent;\n    }\n  }\n\n  return IndeterminateComponent;\n} // This is used to create an alternate fiber to do work on.\n\nfunction createWorkInProgress(current, pendingProps) {\n  var workInProgress = current.alternate;\n\n  if (workInProgress === null) {\n    // We use a double buffering pooling technique because we know that we'll\n    // only ever need at most two versions of a tree. We pool the \"other\" unused\n    // node that we're free to reuse. This is lazily created to avoid allocating\n    // extra objects for things that are never updated. It also allow us to\n    // reclaim the extra memory if needed.\n    workInProgress = createFiber(current.tag, pendingProps, current.key, current.mode);\n    workInProgress.elementType = current.elementType;\n    workInProgress.type = current.type;\n    workInProgress.stateNode = current.stateNode;\n\n    {\n      // DEV-only fields\n      workInProgress._debugID = current._debugID;\n      workInProgress._debugSource = current._debugSource;\n      workInProgress._debugOwner = current._debugOwner;\n      workInProgress._debugHookTypes = current._debugHookTypes;\n    }\n\n    workInProgress.alternate = current;\n    current.alternate = workInProgress;\n  } else {\n    workInProgress.pendingProps = pendingProps; // Needed because Blocks store data on type.\n\n    workInProgress.type = current.type; // We already have an alternate.\n    // Reset the effect tag.\n\n    workInProgress.flags = NoFlags; // The effect list is no longer valid.\n\n    workInProgress.nextEffect = null;\n    workInProgress.firstEffect = null;\n    workInProgress.lastEffect = null;\n\n    {\n      // We intentionally reset, rather than copy, actualDuration & actualStartTime.\n      // This prevents time from endlessly accumulating in new commits.\n      // This has the downside of resetting values for different priority renders,\n      // But works for yielding (the common case) and should support resuming.\n      workInProgress.actualDuration = 0;\n      workInProgress.actualStartTime = -1;\n    }\n  }\n\n  workInProgress.childLanes = current.childLanes;\n  workInProgress.lanes = current.lanes;\n  workInProgress.child = current.child;\n  workInProgress.memoizedProps = current.memoizedProps;\n  workInProgress.memoizedState = current.memoizedState;\n  workInProgress.updateQueue = current.updateQueue; // Clone the dependencies object. This is mutated during the render phase, so\n  // it cannot be shared with the current fiber.\n\n  var currentDependencies = current.dependencies;\n  workInProgress.dependencies = currentDependencies === null ? null : {\n    lanes: currentDependencies.lanes,\n    firstContext: currentDependencies.firstContext\n  }; // These will be overridden during the parent's reconciliation\n\n  workInProgress.sibling = current.sibling;\n  workInProgress.index = current.index;\n  workInProgress.ref = current.ref;\n\n  {\n    workInProgress.selfBaseDuration = current.selfBaseDuration;\n    workInProgress.treeBaseDuration = current.treeBaseDuration;\n  }\n\n  {\n    workInProgress._debugNeedsRemount = current._debugNeedsRemount;\n\n    switch (workInProgress.tag) {\n      case IndeterminateComponent:\n      case FunctionComponent:\n      case SimpleMemoComponent:\n        workInProgress.type = resolveFunctionForHotReloading(current.type);\n        break;\n\n      case ClassComponent:\n        workInProgress.type = resolveClassForHotReloading(current.type);\n        break;\n\n      case ForwardRef:\n        workInProgress.type = resolveForwardRefForHotReloading(current.type);\n        break;\n    }\n  }\n\n  return workInProgress;\n} // Used to reuse a Fiber for a second pass.\n\nfunction resetWorkInProgress(workInProgress, renderLanes) {\n  // This resets the Fiber to what createFiber or createWorkInProgress would\n  // have set the values to before during the first pass. Ideally this wouldn't\n  // be necessary but unfortunately many code paths reads from the workInProgress\n  // when they should be reading from current and writing to workInProgress.\n  // We assume pendingProps, index, key, ref, return are still untouched to\n  // avoid doing another reconciliation.\n  // Reset the effect tag but keep any Placement tags, since that's something\n  // that child fiber is setting, not the reconciliation.\n  workInProgress.flags &= Placement; // The effect list is no longer valid.\n\n  workInProgress.nextEffect = null;\n  workInProgress.firstEffect = null;\n  workInProgress.lastEffect = null;\n  var current = workInProgress.alternate;\n\n  if (current === null) {\n    // Reset to createFiber's initial values.\n    workInProgress.childLanes = NoLanes;\n    workInProgress.lanes = renderLanes;\n    workInProgress.child = null;\n    workInProgress.memoizedProps = null;\n    workInProgress.memoizedState = null;\n    workInProgress.updateQueue = null;\n    workInProgress.dependencies = null;\n    workInProgress.stateNode = null;\n\n    {\n      // Note: We don't reset the actualTime counts. It's useful to accumulate\n      // actual time across multiple render passes.\n      workInProgress.selfBaseDuration = 0;\n      workInProgress.treeBaseDuration = 0;\n    }\n  } else {\n    // Reset to the cloned values that createWorkInProgress would've.\n    workInProgress.childLanes = current.childLanes;\n    workInProgress.lanes = current.lanes;\n    workInProgress.child = current.child;\n    workInProgress.memoizedProps = current.memoizedProps;\n    workInProgress.memoizedState = current.memoizedState;\n    workInProgress.updateQueue = current.updateQueue; // Needed because Blocks store data on type.\n\n    workInProgress.type = current.type; // Clone the dependencies object. This is mutated during the render phase, so\n    // it cannot be shared with the current fiber.\n\n    var currentDependencies = current.dependencies;\n    workInProgress.dependencies = currentDependencies === null ? null : {\n      lanes: currentDependencies.lanes,\n      firstContext: currentDependencies.firstContext\n    };\n\n    {\n      // Note: We don't reset the actualTime counts. It's useful to accumulate\n      // actual time across multiple render passes.\n      workInProgress.selfBaseDuration = current.selfBaseDuration;\n      workInProgress.treeBaseDuration = current.treeBaseDuration;\n    }\n  }\n\n  return workInProgress;\n}\nfunction createHostRootFiber(tag) {\n  var mode;\n\n  if (tag === ConcurrentRoot) {\n    mode = ConcurrentMode | BlockingMode | StrictMode;\n  } else if (tag === BlockingRoot) {\n    mode = BlockingMode | StrictMode;\n  } else {\n    mode = NoMode;\n  }\n\n  if ( isDevToolsPresent) {\n    // Always collect profile timings when DevTools are present.\n    // This enables DevTools to start capturing timing at any point–\n    // Without some nodes in the tree having empty base times.\n    mode |= ProfileMode;\n  }\n\n  return createFiber(HostRoot, null, null, mode);\n}\nfunction createFiberFromTypeAndProps(type, // React$ElementType\nkey, pendingProps, owner, mode, lanes) {\n  var fiberTag = IndeterminateComponent; // The resolved type is set if we know what the final type will be. I.e. it's not lazy.\n\n  var resolvedType = type;\n\n  if (typeof type === 'function') {\n    if (shouldConstruct$1(type)) {\n      fiberTag = ClassComponent;\n\n      {\n        resolvedType = resolveClassForHotReloading(resolvedType);\n      }\n    } else {\n      {\n        resolvedType = resolveFunctionForHotReloading(resolvedType);\n      }\n    }\n  } else if (typeof type === 'string') {\n    fiberTag = HostComponent;\n  } else {\n    getTag: switch (type) {\n      case REACT_FRAGMENT_TYPE:\n        return createFiberFromFragment(pendingProps.children, mode, lanes, key);\n\n      case REACT_DEBUG_TRACING_MODE_TYPE:\n        fiberTag = Mode;\n        mode |= DebugTracingMode;\n        break;\n\n      case REACT_STRICT_MODE_TYPE:\n        fiberTag = Mode;\n        mode |= StrictMode;\n        break;\n\n      case REACT_PROFILER_TYPE:\n        return createFiberFromProfiler(pendingProps, mode, lanes, key);\n\n      case REACT_SUSPENSE_TYPE:\n        return createFiberFromSuspense(pendingProps, mode, lanes, key);\n\n      case REACT_SUSPENSE_LIST_TYPE:\n        return createFiberFromSuspenseList(pendingProps, mode, lanes, key);\n\n      case REACT_OFFSCREEN_TYPE:\n        return createFiberFromOffscreen(pendingProps, mode, lanes, key);\n\n      case REACT_LEGACY_HIDDEN_TYPE:\n        return createFiberFromLegacyHidden(pendingProps, mode, lanes, key);\n\n      case REACT_SCOPE_TYPE:\n\n      // eslint-disable-next-line no-fallthrough\n\n      default:\n        {\n          if (typeof type === 'object' && type !== null) {\n            switch (type.$$typeof) {\n              case REACT_PROVIDER_TYPE:\n                fiberTag = ContextProvider;\n                break getTag;\n\n              case REACT_CONTEXT_TYPE:\n                // This is a consumer\n                fiberTag = ContextConsumer;\n                break getTag;\n\n              case REACT_FORWARD_REF_TYPE:\n                fiberTag = ForwardRef;\n\n                {\n                  resolvedType = resolveForwardRefForHotReloading(resolvedType);\n                }\n\n                break getTag;\n\n              case REACT_MEMO_TYPE:\n                fiberTag = MemoComponent;\n                break getTag;\n\n              case REACT_LAZY_TYPE:\n                fiberTag = LazyComponent;\n                resolvedType = null;\n                break getTag;\n\n              case REACT_BLOCK_TYPE:\n                fiberTag = Block;\n                break getTag;\n            }\n          }\n\n          var info = '';\n\n          {\n            if (type === undefined || typeof type === 'object' && type !== null && Object.keys(type).length === 0) {\n              info += ' You likely forgot to export your component from the file ' + \"it's defined in, or you might have mixed up default and \" + 'named imports.';\n            }\n\n            var ownerName = owner ? getComponentName(owner.type) : null;\n\n            if (ownerName) {\n              info += '\\n\\nCheck the render method of `' + ownerName + '`.';\n            }\n          }\n\n          {\n            {\n              throw Error( \"Element type is invalid: expected a string (for built-in components) or a class/function (for composite components) but got: \" + (type == null ? type : typeof type) + \".\" + info );\n            }\n          }\n        }\n    }\n  }\n\n  var fiber = createFiber(fiberTag, pendingProps, key, mode);\n  fiber.elementType = type;\n  fiber.type = resolvedType;\n  fiber.lanes = lanes;\n\n  {\n    fiber._debugOwner = owner;\n  }\n\n  return fiber;\n}\nfunction createFiberFromElement(element, mode, lanes) {\n  var owner = null;\n\n  {\n    owner = element._owner;\n  }\n\n  var type = element.type;\n  var key = element.key;\n  var pendingProps = element.props;\n  var fiber = createFiberFromTypeAndProps(type, key, pendingProps, owner, mode, lanes);\n\n  {\n    fiber._debugSource = element._source;\n    fiber._debugOwner = element._owner;\n  }\n\n  return fiber;\n}\nfunction createFiberFromFragment(elements, mode, lanes, key) {\n  var fiber = createFiber(Fragment, elements, key, mode);\n  fiber.lanes = lanes;\n  return fiber;\n}\n\nfunction createFiberFromProfiler(pendingProps, mode, lanes, key) {\n  {\n    if (typeof pendingProps.id !== 'string') {\n      error('Profiler must specify an \"id\" as a prop');\n    }\n  }\n\n  var fiber = createFiber(Profiler, pendingProps, key, mode | ProfileMode); // TODO: The Profiler fiber shouldn't have a type. It has a tag.\n\n  fiber.elementType = REACT_PROFILER_TYPE;\n  fiber.type = REACT_PROFILER_TYPE;\n  fiber.lanes = lanes;\n\n  {\n    fiber.stateNode = {\n      effectDuration: 0,\n      passiveEffectDuration: 0\n    };\n  }\n\n  return fiber;\n}\n\nfunction createFiberFromSuspense(pendingProps, mode, lanes, key) {\n  var fiber = createFiber(SuspenseComponent, pendingProps, key, mode); // TODO: The SuspenseComponent fiber shouldn't have a type. It has a tag.\n  // This needs to be fixed in getComponentName so that it relies on the tag\n  // instead.\n\n  fiber.type = REACT_SUSPENSE_TYPE;\n  fiber.elementType = REACT_SUSPENSE_TYPE;\n  fiber.lanes = lanes;\n  return fiber;\n}\nfunction createFiberFromSuspenseList(pendingProps, mode, lanes, key) {\n  var fiber = createFiber(SuspenseListComponent, pendingProps, key, mode);\n\n  {\n    // TODO: The SuspenseListComponent fiber shouldn't have a type. It has a tag.\n    // This needs to be fixed in getComponentName so that it relies on the tag\n    // instead.\n    fiber.type = REACT_SUSPENSE_LIST_TYPE;\n  }\n\n  fiber.elementType = REACT_SUSPENSE_LIST_TYPE;\n  fiber.lanes = lanes;\n  return fiber;\n}\nfunction createFiberFromOffscreen(pendingProps, mode, lanes, key) {\n  var fiber = createFiber(OffscreenComponent, pendingProps, key, mode); // TODO: The OffscreenComponent fiber shouldn't have a type. It has a tag.\n  // This needs to be fixed in getComponentName so that it relies on the tag\n  // instead.\n\n  {\n    fiber.type = REACT_OFFSCREEN_TYPE;\n  }\n\n  fiber.elementType = REACT_OFFSCREEN_TYPE;\n  fiber.lanes = lanes;\n  return fiber;\n}\nfunction createFiberFromLegacyHidden(pendingProps, mode, lanes, key) {\n  var fiber = createFiber(LegacyHiddenComponent, pendingProps, key, mode); // TODO: The LegacyHidden fiber shouldn't have a type. It has a tag.\n  // This needs to be fixed in getComponentName so that it relies on the tag\n  // instead.\n\n  {\n    fiber.type = REACT_LEGACY_HIDDEN_TYPE;\n  }\n\n  fiber.elementType = REACT_LEGACY_HIDDEN_TYPE;\n  fiber.lanes = lanes;\n  return fiber;\n}\nfunction createFiberFromText(content, mode, lanes) {\n  var fiber = createFiber(HostText, content, null, mode);\n  fiber.lanes = lanes;\n  return fiber;\n}\nfunction createFiberFromHostInstanceForDeletion() {\n  var fiber = createFiber(HostComponent, null, null, NoMode); // TODO: These should not need a type.\n\n  fiber.elementType = 'DELETED';\n  fiber.type = 'DELETED';\n  return fiber;\n}\nfunction createFiberFromPortal(portal, mode, lanes) {\n  var pendingProps = portal.children !== null ? portal.children : [];\n  var fiber = createFiber(HostPortal, pendingProps, portal.key, mode);\n  fiber.lanes = lanes;\n  fiber.stateNode = {\n    containerInfo: portal.containerInfo,\n    pendingChildren: null,\n    // Used by persistent updates\n    implementation: portal.implementation\n  };\n  return fiber;\n} // Used for stashing WIP properties to replay failed work in DEV.\n\nfunction assignFiberPropertiesInDEV(target, source) {\n  if (target === null) {\n    // This Fiber's initial properties will always be overwritten.\n    // We only use a Fiber to ensure the same hidden class so DEV isn't slow.\n    target = createFiber(IndeterminateComponent, null, null, NoMode);\n  } // This is intentionally written as a list of all properties.\n  // We tried to use Object.assign() instead but this is called in\n  // the hottest path, and Object.assign() was too slow:\n  // https://github.com/facebook/react/issues/12502\n  // This code is DEV-only so size is not a concern.\n\n\n  target.tag = source.tag;\n  target.key = source.key;\n  target.elementType = source.elementType;\n  target.type = source.type;\n  target.stateNode = source.stateNode;\n  target.return = source.return;\n  target.child = source.child;\n  target.sibling = source.sibling;\n  target.index = source.index;\n  target.ref = source.ref;\n  target.pendingProps = source.pendingProps;\n  target.memoizedProps = source.memoizedProps;\n  target.updateQueue = source.updateQueue;\n  target.memoizedState = source.memoizedState;\n  target.dependencies = source.dependencies;\n  target.mode = source.mode;\n  target.flags = source.flags;\n  target.nextEffect = source.nextEffect;\n  target.firstEffect = source.firstEffect;\n  target.lastEffect = source.lastEffect;\n  target.lanes = source.lanes;\n  target.childLanes = source.childLanes;\n  target.alternate = source.alternate;\n\n  {\n    target.actualDuration = source.actualDuration;\n    target.actualStartTime = source.actualStartTime;\n    target.selfBaseDuration = source.selfBaseDuration;\n    target.treeBaseDuration = source.treeBaseDuration;\n  }\n\n  target._debugID = source._debugID;\n  target._debugSource = source._debugSource;\n  target._debugOwner = source._debugOwner;\n  target._debugNeedsRemount = source._debugNeedsRemount;\n  target._debugHookTypes = source._debugHookTypes;\n  return target;\n}\n\nfunction FiberRootNode(containerInfo, tag, hydrate) {\n  this.tag = tag;\n  this.containerInfo = containerInfo;\n  this.pendingChildren = null;\n  this.current = null;\n  this.pingCache = null;\n  this.finishedWork = null;\n  this.timeoutHandle = noTimeout;\n  this.context = null;\n  this.pendingContext = null;\n  this.hydrate = hydrate;\n  this.callbackNode = null;\n  this.callbackPriority = NoLanePriority;\n  this.eventTimes = createLaneMap(NoLanes);\n  this.expirationTimes = createLaneMap(NoTimestamp);\n  this.pendingLanes = NoLanes;\n  this.suspendedLanes = NoLanes;\n  this.pingedLanes = NoLanes;\n  this.expiredLanes = NoLanes;\n  this.mutableReadLanes = NoLanes;\n  this.finishedLanes = NoLanes;\n  this.entangledLanes = NoLanes;\n  this.entanglements = createLaneMap(NoLanes);\n\n  {\n    this.mutableSourceEagerHydrationData = null;\n  }\n\n  {\n    this.interactionThreadID = tracing.unstable_getThreadID();\n    this.memoizedInteractions = new Set();\n    this.pendingInteractionMap = new Map();\n  }\n\n  {\n    switch (tag) {\n      case BlockingRoot:\n        this._debugRootType = 'createBlockingRoot()';\n        break;\n\n      case ConcurrentRoot:\n        this._debugRootType = 'createRoot()';\n        break;\n\n      case LegacyRoot:\n        this._debugRootType = 'createLegacyRoot()';\n        break;\n    }\n  }\n}\n\nfunction createFiberRoot(containerInfo, tag, hydrate, hydrationCallbacks) {\n  var root = new FiberRootNode(containerInfo, tag, hydrate);\n  // stateNode is any.\n\n\n  var uninitializedFiber = createHostRootFiber(tag);\n  root.current = uninitializedFiber;\n  uninitializedFiber.stateNode = root;\n  initializeUpdateQueue(uninitializedFiber);\n  return root;\n}\n\n// This ensures that the version used for server rendering matches the one\n// that is eventually read during hydration.\n// If they don't match there's a potential tear and a full deopt render is required.\n\nfunction registerMutableSourceForHydration(root, mutableSource) {\n  var getVersion = mutableSource._getVersion;\n  var version = getVersion(mutableSource._source); // TODO Clear this data once all pending hydration work is finished.\n  // Retaining it forever may interfere with GC.\n\n  if (root.mutableSourceEagerHydrationData == null) {\n    root.mutableSourceEagerHydrationData = [mutableSource, version];\n  } else {\n    root.mutableSourceEagerHydrationData.push(mutableSource, version);\n  }\n}\n\nfunction createPortal(children, containerInfo, // TODO: figure out the API for cross-renderer implementation.\nimplementation) {\n  var key = arguments.length > 3 && arguments[3] !== undefined ? arguments[3] : null;\n  return {\n    // This tag allow us to uniquely identify this as a React Portal\n    $$typeof: REACT_PORTAL_TYPE,\n    key: key == null ? null : '' + key,\n    children: children,\n    containerInfo: containerInfo,\n    implementation: implementation\n  };\n}\n\nvar didWarnAboutNestedUpdates;\nvar didWarnAboutFindNodeInStrictMode;\n\n{\n  didWarnAboutNestedUpdates = false;\n  didWarnAboutFindNodeInStrictMode = {};\n}\n\nfunction getContextForSubtree(parentComponent) {\n  if (!parentComponent) {\n    return emptyContextObject;\n  }\n\n  var fiber = get(parentComponent);\n  var parentContext = findCurrentUnmaskedContext(fiber);\n\n  if (fiber.tag === ClassComponent) {\n    var Component = fiber.type;\n\n    if (isContextProvider(Component)) {\n      return processChildContext(fiber, Component, parentContext);\n    }\n  }\n\n  return parentContext;\n}\n\nfunction findHostInstanceWithWarning(component, methodName) {\n  {\n    var fiber = get(component);\n\n    if (fiber === undefined) {\n      if (typeof component.render === 'function') {\n        {\n          {\n            throw Error( \"Unable to find node on an unmounted component.\" );\n          }\n        }\n      } else {\n        {\n          {\n            throw Error( \"Argument appears to not be a ReactComponent. Keys: \" + Object.keys(component) );\n          }\n        }\n      }\n    }\n\n    var hostFiber = findCurrentHostFiber(fiber);\n\n    if (hostFiber === null) {\n      return null;\n    }\n\n    if (hostFiber.mode & StrictMode) {\n      var componentName = getComponentName(fiber.type) || 'Component';\n\n      if (!didWarnAboutFindNodeInStrictMode[componentName]) {\n        didWarnAboutFindNodeInStrictMode[componentName] = true;\n        var previousFiber = current;\n\n        try {\n          setCurrentFiber(hostFiber);\n\n          if (fiber.mode & StrictMode) {\n            error('%s is deprecated in StrictMode. ' + '%s was passed an instance of %s which is inside StrictMode. ' + 'Instead, add a ref directly to the element you want to reference. ' + 'Learn more about using refs safely here: ' + 'https://reactjs.org/link/strict-mode-find-node', methodName, methodName, componentName);\n          } else {\n            error('%s is deprecated in StrictMode. ' + '%s was passed an instance of %s which renders StrictMode children. ' + 'Instead, add a ref directly to the element you want to reference. ' + 'Learn more about using refs safely here: ' + 'https://reactjs.org/link/strict-mode-find-node', methodName, methodName, componentName);\n          }\n        } finally {\n          // Ideally this should reset to previous but this shouldn't be called in\n          // render and there's another warning for that anyway.\n          if (previousFiber) {\n            setCurrentFiber(previousFiber);\n          } else {\n            resetCurrentFiber();\n          }\n        }\n      }\n    }\n\n    return hostFiber.stateNode;\n  }\n}\n\nfunction createContainer(containerInfo, tag, hydrate, hydrationCallbacks) {\n  return createFiberRoot(containerInfo, tag, hydrate);\n}\nfunction updateContainer(element, container, parentComponent, callback) {\n  {\n    onScheduleRoot(container, element);\n  }\n\n  var current$1 = container.current;\n  var eventTime = requestEventTime();\n\n  {\n    // $FlowExpectedError - jest isn't a global, and isn't recognized outside of tests\n    if ('undefined' !== typeof jest) {\n      warnIfUnmockedScheduler(current$1);\n      warnIfNotScopedWithMatchingAct(current$1);\n    }\n  }\n\n  var lane = requestUpdateLane(current$1);\n\n  var context = getContextForSubtree(parentComponent);\n\n  if (container.context === null) {\n    container.context = context;\n  } else {\n    container.pendingContext = context;\n  }\n\n  {\n    if (isRendering && current !== null && !didWarnAboutNestedUpdates) {\n      didWarnAboutNestedUpdates = true;\n\n      error('Render methods should be a pure function of props and state; ' + 'triggering nested component updates from render is not allowed. ' + 'If necessary, trigger nested updates in componentDidUpdate.\\n\\n' + 'Check the render method of %s.', getComponentName(current.type) || 'Unknown');\n    }\n  }\n\n  var update = createUpdate(eventTime, lane); // Caution: React DevTools currently depends on this property\n  // being called \"element\".\n\n  update.payload = {\n    element: element\n  };\n  callback = callback === undefined ? null : callback;\n\n  if (callback !== null) {\n    {\n      if (typeof callback !== 'function') {\n        error('render(...): Expected the last optional `callback` argument to be a ' + 'function. Instead received: %s.', callback);\n      }\n    }\n\n    update.callback = callback;\n  }\n\n  enqueueUpdate(current$1, update);\n  scheduleUpdateOnFiber(current$1, lane, eventTime);\n  return lane;\n}\nfunction getPublicRootInstance(container) {\n  var containerFiber = container.current;\n\n  if (!containerFiber.child) {\n    return null;\n  }\n\n  switch (containerFiber.child.tag) {\n    case HostComponent:\n      return getPublicInstance(containerFiber.child.stateNode);\n\n    default:\n      return containerFiber.child.stateNode;\n  }\n}\n\nfunction markRetryLaneImpl(fiber, retryLane) {\n  var suspenseState = fiber.memoizedState;\n\n  if (suspenseState !== null && suspenseState.dehydrated !== null) {\n    suspenseState.retryLane = higherPriorityLane(suspenseState.retryLane, retryLane);\n  }\n} // Increases the priority of thennables when they resolve within this boundary.\n\n\nfunction markRetryLaneIfNotHydrated(fiber, retryLane) {\n  markRetryLaneImpl(fiber, retryLane);\n  var alternate = fiber.alternate;\n\n  if (alternate) {\n    markRetryLaneImpl(alternate, retryLane);\n  }\n}\n\nfunction attemptUserBlockingHydration$1(fiber) {\n  if (fiber.tag !== SuspenseComponent) {\n    // We ignore HostRoots here because we can't increase\n    // their priority and they should not suspend on I/O,\n    // since you have to wrap anything that might suspend in\n    // Suspense.\n    return;\n  }\n\n  var eventTime = requestEventTime();\n  var lane = InputDiscreteHydrationLane;\n  scheduleUpdateOnFiber(fiber, lane, eventTime);\n  markRetryLaneIfNotHydrated(fiber, lane);\n}\nfunction attemptContinuousHydration$1(fiber) {\n  if (fiber.tag !== SuspenseComponent) {\n    // We ignore HostRoots here because we can't increase\n    // their priority and they should not suspend on I/O,\n    // since you have to wrap anything that might suspend in\n    // Suspense.\n    return;\n  }\n\n  var eventTime = requestEventTime();\n  var lane = SelectiveHydrationLane;\n  scheduleUpdateOnFiber(fiber, lane, eventTime);\n  markRetryLaneIfNotHydrated(fiber, lane);\n}\nfunction attemptHydrationAtCurrentPriority$1(fiber) {\n  if (fiber.tag !== SuspenseComponent) {\n    // We ignore HostRoots here because we can't increase\n    // their priority other than synchronously flush it.\n    return;\n  }\n\n  var eventTime = requestEventTime();\n  var lane = requestUpdateLane(fiber);\n  scheduleUpdateOnFiber(fiber, lane, eventTime);\n  markRetryLaneIfNotHydrated(fiber, lane);\n}\nfunction runWithPriority$2(priority, fn) {\n\n  try {\n    setCurrentUpdateLanePriority(priority);\n    return fn();\n  } finally {\n  }\n}\nfunction findHostInstanceWithNoPortals(fiber) {\n  var hostFiber = findCurrentHostFiberWithNoPortals(fiber);\n\n  if (hostFiber === null) {\n    return null;\n  }\n\n  if (hostFiber.tag === FundamentalComponent) {\n    return hostFiber.stateNode.instance;\n  }\n\n  return hostFiber.stateNode;\n}\n\nvar shouldSuspendImpl = function (fiber) {\n  return false;\n};\n\nfunction shouldSuspend(fiber) {\n  return shouldSuspendImpl(fiber);\n}\nvar overrideHookState = null;\nvar overrideHookStateDeletePath = null;\nvar overrideHookStateRenamePath = null;\nvar overrideProps = null;\nvar overridePropsDeletePath = null;\nvar overridePropsRenamePath = null;\nvar scheduleUpdate = null;\nvar setSuspenseHandler = null;\n\n{\n  var copyWithDeleteImpl = function (obj, path, index) {\n    var key = path[index];\n    var updated = Array.isArray(obj) ? obj.slice() : _assign({}, obj);\n\n    if (index + 1 === path.length) {\n      if (Array.isArray(updated)) {\n        updated.splice(key, 1);\n      } else {\n        delete updated[key];\n      }\n\n      return updated;\n    } // $FlowFixMe number or string is fine here\n\n\n    updated[key] = copyWithDeleteImpl(obj[key], path, index + 1);\n    return updated;\n  };\n\n  var copyWithDelete = function (obj, path) {\n    return copyWithDeleteImpl(obj, path, 0);\n  };\n\n  var copyWithRenameImpl = function (obj, oldPath, newPath, index) {\n    var oldKey = oldPath[index];\n    var updated = Array.isArray(obj) ? obj.slice() : _assign({}, obj);\n\n    if (index + 1 === oldPath.length) {\n      var newKey = newPath[index]; // $FlowFixMe number or string is fine here\n\n      updated[newKey] = updated[oldKey];\n\n      if (Array.isArray(updated)) {\n        updated.splice(oldKey, 1);\n      } else {\n        delete updated[oldKey];\n      }\n    } else {\n      // $FlowFixMe number or string is fine here\n      updated[oldKey] = copyWithRenameImpl( // $FlowFixMe number or string is fine here\n      obj[oldKey], oldPath, newPath, index + 1);\n    }\n\n    return updated;\n  };\n\n  var copyWithRename = function (obj, oldPath, newPath) {\n    if (oldPath.length !== newPath.length) {\n      warn('copyWithRename() expects paths of the same length');\n\n      return;\n    } else {\n      for (var i = 0; i < newPath.length - 1; i++) {\n        if (oldPath[i] !== newPath[i]) {\n          warn('copyWithRename() expects paths to be the same except for the deepest key');\n\n          return;\n        }\n      }\n    }\n\n    return copyWithRenameImpl(obj, oldPath, newPath, 0);\n  };\n\n  var copyWithSetImpl = function (obj, path, index, value) {\n    if (index >= path.length) {\n      return value;\n    }\n\n    var key = path[index];\n    var updated = Array.isArray(obj) ? obj.slice() : _assign({}, obj); // $FlowFixMe number or string is fine here\n\n    updated[key] = copyWithSetImpl(obj[key], path, index + 1, value);\n    return updated;\n  };\n\n  var copyWithSet = function (obj, path, value) {\n    return copyWithSetImpl(obj, path, 0, value);\n  };\n\n  var findHook = function (fiber, id) {\n    // For now, the \"id\" of stateful hooks is just the stateful hook index.\n    // This may change in the future with e.g. nested hooks.\n    var currentHook = fiber.memoizedState;\n\n    while (currentHook !== null && id > 0) {\n      currentHook = currentHook.next;\n      id--;\n    }\n\n    return currentHook;\n  }; // Support DevTools editable values for useState and useReducer.\n\n\n  overrideHookState = function (fiber, id, path, value) {\n    var hook = findHook(fiber, id);\n\n    if (hook !== null) {\n      var newState = copyWithSet(hook.memoizedState, path, value);\n      hook.memoizedState = newState;\n      hook.baseState = newState; // We aren't actually adding an update to the queue,\n      // because there is no update we can add for useReducer hooks that won't trigger an error.\n      // (There's no appropriate action type for DevTools overrides.)\n      // As a result though, React will see the scheduled update as a noop and bailout.\n      // Shallow cloning props works as a workaround for now to bypass the bailout check.\n\n      fiber.memoizedProps = _assign({}, fiber.memoizedProps);\n      scheduleUpdateOnFiber(fiber, SyncLane, NoTimestamp);\n    }\n  };\n\n  overrideHookStateDeletePath = function (fiber, id, path) {\n    var hook = findHook(fiber, id);\n\n    if (hook !== null) {\n      var newState = copyWithDelete(hook.memoizedState, path);\n      hook.memoizedState = newState;\n      hook.baseState = newState; // We aren't actually adding an update to the queue,\n      // because there is no update we can add for useReducer hooks that won't trigger an error.\n      // (There's no appropriate action type for DevTools overrides.)\n      // As a result though, React will see the scheduled update as a noop and bailout.\n      // Shallow cloning props works as a workaround for now to bypass the bailout check.\n\n      fiber.memoizedProps = _assign({}, fiber.memoizedProps);\n      scheduleUpdateOnFiber(fiber, SyncLane, NoTimestamp);\n    }\n  };\n\n  overrideHookStateRenamePath = function (fiber, id, oldPath, newPath) {\n    var hook = findHook(fiber, id);\n\n    if (hook !== null) {\n      var newState = copyWithRename(hook.memoizedState, oldPath, newPath);\n      hook.memoizedState = newState;\n      hook.baseState = newState; // We aren't actually adding an update to the queue,\n      // because there is no update we can add for useReducer hooks that won't trigger an error.\n      // (There's no appropriate action type for DevTools overrides.)\n      // As a result though, React will see the scheduled update as a noop and bailout.\n      // Shallow cloning props works as a workaround for now to bypass the bailout check.\n\n      fiber.memoizedProps = _assign({}, fiber.memoizedProps);\n      scheduleUpdateOnFiber(fiber, SyncLane, NoTimestamp);\n    }\n  }; // Support DevTools props for function components, forwardRef, memo, host components, etc.\n\n\n  overrideProps = function (fiber, path, value) {\n    fiber.pendingProps = copyWithSet(fiber.memoizedProps, path, value);\n\n    if (fiber.alternate) {\n      fiber.alternate.pendingProps = fiber.pendingProps;\n    }\n\n    scheduleUpdateOnFiber(fiber, SyncLane, NoTimestamp);\n  };\n\n  overridePropsDeletePath = function (fiber, path) {\n    fiber.pendingProps = copyWithDelete(fiber.memoizedProps, path);\n\n    if (fiber.alternate) {\n      fiber.alternate.pendingProps = fiber.pendingProps;\n    }\n\n    scheduleUpdateOnFiber(fiber, SyncLane, NoTimestamp);\n  };\n\n  overridePropsRenamePath = function (fiber, oldPath, newPath) {\n    fiber.pendingProps = copyWithRename(fiber.memoizedProps, oldPath, newPath);\n\n    if (fiber.alternate) {\n      fiber.alternate.pendingProps = fiber.pendingProps;\n    }\n\n    scheduleUpdateOnFiber(fiber, SyncLane, NoTimestamp);\n  };\n\n  scheduleUpdate = function (fiber) {\n    scheduleUpdateOnFiber(fiber, SyncLane, NoTimestamp);\n  };\n\n  setSuspenseHandler = function (newShouldSuspendImpl) {\n    shouldSuspendImpl = newShouldSuspendImpl;\n  };\n}\n\nfunction findHostInstanceByFiber(fiber) {\n  var hostFiber = findCurrentHostFiber(fiber);\n\n  if (hostFiber === null) {\n    return null;\n  }\n\n  return hostFiber.stateNode;\n}\n\nfunction emptyFindFiberByHostInstance(instance) {\n  return null;\n}\n\nfunction getCurrentFiberForDevTools() {\n  return current;\n}\n\nfunction injectIntoDevTools(devToolsConfig) {\n  var findFiberByHostInstance = devToolsConfig.findFiberByHostInstance;\n  var ReactCurrentDispatcher = ReactSharedInternals.ReactCurrentDispatcher;\n  return injectInternals({\n    bundleType: devToolsConfig.bundleType,\n    version: devToolsConfig.version,\n    rendererPackageName: devToolsConfig.rendererPackageName,\n    rendererConfig: devToolsConfig.rendererConfig,\n    overrideHookState: overrideHookState,\n    overrideHookStateDeletePath: overrideHookStateDeletePath,\n    overrideHookStateRenamePath: overrideHookStateRenamePath,\n    overrideProps: overrideProps,\n    overridePropsDeletePath: overridePropsDeletePath,\n    overridePropsRenamePath: overridePropsRenamePath,\n    setSuspenseHandler: setSuspenseHandler,\n    scheduleUpdate: scheduleUpdate,\n    currentDispatcherRef: ReactCurrentDispatcher,\n    findHostInstanceByFiber: findHostInstanceByFiber,\n    findFiberByHostInstance: findFiberByHostInstance || emptyFindFiberByHostInstance,\n    // React Refresh\n    findHostInstancesForRefresh:  findHostInstancesForRefresh ,\n    scheduleRefresh:  scheduleRefresh ,\n    scheduleRoot:  scheduleRoot ,\n    setRefreshHandler:  setRefreshHandler ,\n    // Enables DevTools to append owner stacks to error messages in DEV mode.\n    getCurrentFiber:  getCurrentFiberForDevTools \n  });\n}\n\nfunction ReactDOMRoot(container, options) {\n  this._internalRoot = createRootImpl(container, ConcurrentRoot, options);\n}\n\nfunction ReactDOMBlockingRoot(container, tag, options) {\n  this._internalRoot = createRootImpl(container, tag, options);\n}\n\nReactDOMRoot.prototype.render = ReactDOMBlockingRoot.prototype.render = function (children) {\n  var root = this._internalRoot;\n\n  {\n    if (typeof arguments[1] === 'function') {\n      error('render(...): does not support the second callback argument. ' + 'To execute a side effect after rendering, declare it in a component body with useEffect().');\n    }\n\n    var container = root.containerInfo;\n\n    if (container.nodeType !== COMMENT_NODE) {\n      var hostInstance = findHostInstanceWithNoPortals(root.current);\n\n      if (hostInstance) {\n        if (hostInstance.parentNode !== container) {\n          error('render(...): It looks like the React-rendered content of the ' + 'root container was removed without using React. This is not ' + 'supported and will cause errors. Instead, call ' + \"root.unmount() to empty a root's container.\");\n        }\n      }\n    }\n  }\n\n  updateContainer(children, root, null, null);\n};\n\nReactDOMRoot.prototype.unmount = ReactDOMBlockingRoot.prototype.unmount = function () {\n  {\n    if (typeof arguments[0] === 'function') {\n      error('unmount(...): does not support a callback argument. ' + 'To execute a side effect after rendering, declare it in a component body with useEffect().');\n    }\n  }\n\n  var root = this._internalRoot;\n  var container = root.containerInfo;\n  updateContainer(null, root, null, function () {\n    unmarkContainerAsRoot(container);\n  });\n};\n\nfunction createRootImpl(container, tag, options) {\n  // Tag is either LegacyRoot or Concurrent Root\n  var hydrate = options != null && options.hydrate === true;\n  var hydrationCallbacks = options != null && options.hydrationOptions || null;\n  var mutableSources = options != null && options.hydrationOptions != null && options.hydrationOptions.mutableSources || null;\n  var root = createContainer(container, tag, hydrate);\n  markContainerAsRoot(root.current, container);\n  var containerNodeType = container.nodeType;\n\n  {\n    var rootContainerElement = container.nodeType === COMMENT_NODE ? container.parentNode : container;\n    listenToAllSupportedEvents(rootContainerElement);\n  }\n\n  if (mutableSources) {\n    for (var i = 0; i < mutableSources.length; i++) {\n      var mutableSource = mutableSources[i];\n      registerMutableSourceForHydration(root, mutableSource);\n    }\n  }\n\n  return root;\n}\nfunction createLegacyRoot(container, options) {\n  return new ReactDOMBlockingRoot(container, LegacyRoot, options);\n}\nfunction isValidContainer(node) {\n  return !!(node && (node.nodeType === ELEMENT_NODE || node.nodeType === DOCUMENT_NODE || node.nodeType === DOCUMENT_FRAGMENT_NODE || node.nodeType === COMMENT_NODE && node.nodeValue === ' react-mount-point-unstable '));\n}\n\nvar ReactCurrentOwner$3 = ReactSharedInternals.ReactCurrentOwner;\nvar topLevelUpdateWarnings;\nvar warnedAboutHydrateAPI = false;\n\n{\n  topLevelUpdateWarnings = function (container) {\n    if (container._reactRootContainer && container.nodeType !== COMMENT_NODE) {\n      var hostInstance = findHostInstanceWithNoPortals(container._reactRootContainer._internalRoot.current);\n\n      if (hostInstance) {\n        if (hostInstance.parentNode !== container) {\n          error('render(...): It looks like the React-rendered content of this ' + 'container was removed without using React. This is not ' + 'supported and will cause errors. Instead, call ' + 'ReactDOM.unmountComponentAtNode to empty a container.');\n        }\n      }\n    }\n\n    var isRootRenderedBySomeReact = !!container._reactRootContainer;\n    var rootEl = getReactRootElementInContainer(container);\n    var hasNonRootReactChild = !!(rootEl && getInstanceFromNode(rootEl));\n\n    if (hasNonRootReactChild && !isRootRenderedBySomeReact) {\n      error('render(...): Replacing React-rendered children with a new root ' + 'component. If you intended to update the children of this node, ' + 'you should instead have the existing children update their state ' + 'and render the new components instead of calling ReactDOM.render.');\n    }\n\n    if (container.nodeType === ELEMENT_NODE && container.tagName && container.tagName.toUpperCase() === 'BODY') {\n      error('render(): Rendering components directly into document.body is ' + 'discouraged, since its children are often manipulated by third-party ' + 'scripts and browser extensions. This may lead to subtle ' + 'reconciliation issues. Try rendering into a container element created ' + 'for your app.');\n    }\n  };\n}\n\nfunction getReactRootElementInContainer(container) {\n  if (!container) {\n    return null;\n  }\n\n  if (container.nodeType === DOCUMENT_NODE) {\n    return container.documentElement;\n  } else {\n    return container.firstChild;\n  }\n}\n\nfunction shouldHydrateDueToLegacyHeuristic(container) {\n  var rootElement = getReactRootElementInContainer(container);\n  return !!(rootElement && rootElement.nodeType === ELEMENT_NODE && rootElement.hasAttribute(ROOT_ATTRIBUTE_NAME));\n}\n\nfunction legacyCreateRootFromDOMContainer(container, forceHydrate) {\n  var shouldHydrate = forceHydrate || shouldHydrateDueToLegacyHeuristic(container); // First clear any existing content.\n\n  if (!shouldHydrate) {\n    var warned = false;\n    var rootSibling;\n\n    while (rootSibling = container.lastChild) {\n      {\n        if (!warned && rootSibling.nodeType === ELEMENT_NODE && rootSibling.hasAttribute(ROOT_ATTRIBUTE_NAME)) {\n          warned = true;\n\n          error('render(): Target node has markup rendered by React, but there ' + 'are unrelated nodes as well. This is most commonly caused by ' + 'white-space inserted around server-rendered markup.');\n        }\n      }\n\n      container.removeChild(rootSibling);\n    }\n  }\n\n  {\n    if (shouldHydrate && !forceHydrate && !warnedAboutHydrateAPI) {\n      warnedAboutHydrateAPI = true;\n\n      warn('render(): Calling ReactDOM.render() to hydrate server-rendered markup ' + 'will stop working in React v18. Replace the ReactDOM.render() call ' + 'with ReactDOM.hydrate() if you want React to attach to the server HTML.');\n    }\n  }\n\n  return createLegacyRoot(container, shouldHydrate ? {\n    hydrate: true\n  } : undefined);\n}\n\nfunction warnOnInvalidCallback$1(callback, callerName) {\n  {\n    if (callback !== null && typeof callback !== 'function') {\n      error('%s(...): Expected the last optional `callback` argument to be a ' + 'function. Instead received: %s.', callerName, callback);\n    }\n  }\n}\n\nfunction legacyRenderSubtreeIntoContainer(parentComponent, children, container, forceHydrate, callback) {\n  {\n    topLevelUpdateWarnings(container);\n    warnOnInvalidCallback$1(callback === undefined ? null : callback, 'render');\n  } // TODO: Without `any` type, Flow says \"Property cannot be accessed on any\n  // member of intersection type.\" Whyyyyyy.\n\n\n  var root = container._reactRootContainer;\n  var fiberRoot;\n\n  if (!root) {\n    // Initial mount\n    root = container._reactRootContainer = legacyCreateRootFromDOMContainer(container, forceHydrate);\n    fiberRoot = root._internalRoot;\n\n    if (typeof callback === 'function') {\n      var originalCallback = callback;\n\n      callback = function () {\n        var instance = getPublicRootInstance(fiberRoot);\n        originalCallback.call(instance);\n      };\n    } // Initial mount should not be batched.\n\n\n    unbatchedUpdates(function () {\n      updateContainer(children, fiberRoot, parentComponent, callback);\n    });\n  } else {\n    fiberRoot = root._internalRoot;\n\n    if (typeof callback === 'function') {\n      var _originalCallback = callback;\n\n      callback = function () {\n        var instance = getPublicRootInstance(fiberRoot);\n\n        _originalCallback.call(instance);\n      };\n    } // Update\n\n\n    updateContainer(children, fiberRoot, parentComponent, callback);\n  }\n\n  return getPublicRootInstance(fiberRoot);\n}\n\nfunction findDOMNode(componentOrElement) {\n  {\n    var owner = ReactCurrentOwner$3.current;\n\n    if (owner !== null && owner.stateNode !== null) {\n      var warnedAboutRefsInRender = owner.stateNode._warnedAboutRefsInRender;\n\n      if (!warnedAboutRefsInRender) {\n        error('%s is accessing findDOMNode inside its render(). ' + 'render() should be a pure function of props and state. It should ' + 'never access something that requires stale data from the previous ' + 'render, such as refs. Move this logic to componentDidMount and ' + 'componentDidUpdate instead.', getComponentName(owner.type) || 'A component');\n      }\n\n      owner.stateNode._warnedAboutRefsInRender = true;\n    }\n  }\n\n  if (componentOrElement == null) {\n    return null;\n  }\n\n  if (componentOrElement.nodeType === ELEMENT_NODE) {\n    return componentOrElement;\n  }\n\n  {\n    return findHostInstanceWithWarning(componentOrElement, 'findDOMNode');\n  }\n}\nfunction hydrate(element, container, callback) {\n  if (!isValidContainer(container)) {\n    {\n      throw Error( \"Target container is not a DOM element.\" );\n    }\n  }\n\n  {\n    var isModernRoot = isContainerMarkedAsRoot(container) && container._reactRootContainer === undefined;\n\n    if (isModernRoot) {\n      error('You are calling ReactDOM.hydrate() on a container that was previously ' + 'passed to ReactDOM.createRoot(). This is not supported. ' + 'Did you mean to call createRoot(container, {hydrate: true}).render(element)?');\n    }\n  } // TODO: throw or warn if we couldn't hydrate?\n\n\n  return legacyRenderSubtreeIntoContainer(null, element, container, true, callback);\n}\nfunction render(element, container, callback) {\n  if (!isValidContainer(container)) {\n    {\n      throw Error( \"Target container is not a DOM element.\" );\n    }\n  }\n\n  {\n    var isModernRoot = isContainerMarkedAsRoot(container) && container._reactRootContainer === undefined;\n\n    if (isModernRoot) {\n      error('You are calling ReactDOM.render() on a container that was previously ' + 'passed to ReactDOM.createRoot(). This is not supported. ' + 'Did you mean to call root.render(element)?');\n    }\n  }\n\n  return legacyRenderSubtreeIntoContainer(null, element, container, false, callback);\n}\nfunction unstable_renderSubtreeIntoContainer(parentComponent, element, containerNode, callback) {\n  if (!isValidContainer(containerNode)) {\n    {\n      throw Error( \"Target container is not a DOM element.\" );\n    }\n  }\n\n  if (!(parentComponent != null && has(parentComponent))) {\n    {\n      throw Error( \"parentComponent must be a valid React Component\" );\n    }\n  }\n\n  return legacyRenderSubtreeIntoContainer(parentComponent, element, containerNode, false, callback);\n}\nfunction unmountComponentAtNode(container) {\n  if (!isValidContainer(container)) {\n    {\n      throw Error( \"unmountComponentAtNode(...): Target container is not a DOM element.\" );\n    }\n  }\n\n  {\n    var isModernRoot = isContainerMarkedAsRoot(container) && container._reactRootContainer === undefined;\n\n    if (isModernRoot) {\n      error('You are calling ReactDOM.unmountComponentAtNode() on a container that was previously ' + 'passed to ReactDOM.createRoot(). This is not supported. Did you mean to call root.unmount()?');\n    }\n  }\n\n  if (container._reactRootContainer) {\n    {\n      var rootEl = getReactRootElementInContainer(container);\n      var renderedByDifferentReact = rootEl && !getInstanceFromNode(rootEl);\n\n      if (renderedByDifferentReact) {\n        error(\"unmountComponentAtNode(): The node you're attempting to unmount \" + 'was rendered by another copy of React.');\n      }\n    } // Unmount should not be batched.\n\n\n    unbatchedUpdates(function () {\n      legacyRenderSubtreeIntoContainer(null, null, container, false, function () {\n        // $FlowFixMe This should probably use `delete container._reactRootContainer`\n        container._reactRootContainer = null;\n        unmarkContainerAsRoot(container);\n      });\n    }); // If you call unmountComponentAtNode twice in quick succession, you'll\n    // get `true` twice. That's probably fine?\n\n    return true;\n  } else {\n    {\n      var _rootEl = getReactRootElementInContainer(container);\n\n      var hasNonRootReactChild = !!(_rootEl && getInstanceFromNode(_rootEl)); // Check if the container itself is a React root node.\n\n      var isContainerReactRoot = container.nodeType === ELEMENT_NODE && isValidContainer(container.parentNode) && !!container.parentNode._reactRootContainer;\n\n      if (hasNonRootReactChild) {\n        error(\"unmountComponentAtNode(): The node you're attempting to unmount \" + 'was rendered by React and is not a top-level container. %s', isContainerReactRoot ? 'You may have accidentally passed in a React root node instead ' + 'of its container.' : 'Instead, have the parent component update its state and ' + 'rerender in order to remove this component.');\n      }\n    }\n\n    return false;\n  }\n}\n\nsetAttemptUserBlockingHydration(attemptUserBlockingHydration$1);\nsetAttemptContinuousHydration(attemptContinuousHydration$1);\nsetAttemptHydrationAtCurrentPriority(attemptHydrationAtCurrentPriority$1);\nsetAttemptHydrationAtPriority(runWithPriority$2);\nvar didWarnAboutUnstableCreatePortal = false;\n\n{\n  if (typeof Map !== 'function' || // $FlowIssue Flow incorrectly thinks Map has no prototype\n  Map.prototype == null || typeof Map.prototype.forEach !== 'function' || typeof Set !== 'function' || // $FlowIssue Flow incorrectly thinks Set has no prototype\n  Set.prototype == null || typeof Set.prototype.clear !== 'function' || typeof Set.prototype.forEach !== 'function') {\n    error('React depends on Map and Set built-in types. Make sure that you load a ' + 'polyfill in older browsers. https://reactjs.org/link/react-polyfills');\n  }\n}\n\nsetRestoreImplementation(restoreControlledState$3);\nsetBatchingImplementation(batchedUpdates$1, discreteUpdates$1, flushDiscreteUpdates, batchedEventUpdates$1);\n\nfunction createPortal$1(children, container) {\n  var key = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : null;\n\n  if (!isValidContainer(container)) {\n    {\n      throw Error( \"Target container is not a DOM element.\" );\n    }\n  } // TODO: pass ReactDOM portal implementation as third argument\n  // $FlowFixMe The Flow type is opaque but there's no way to actually create it.\n\n\n  return createPortal(children, container, null, key);\n}\n\nfunction renderSubtreeIntoContainer(parentComponent, element, containerNode, callback) {\n\n  return unstable_renderSubtreeIntoContainer(parentComponent, element, containerNode, callback);\n}\n\nfunction unstable_createPortal(children, container) {\n  var key = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : null;\n\n  {\n    if (!didWarnAboutUnstableCreatePortal) {\n      didWarnAboutUnstableCreatePortal = true;\n\n      warn('The ReactDOM.unstable_createPortal() alias has been deprecated, ' + 'and will be removed in React 18+. Update your code to use ' + 'ReactDOM.createPortal() instead. It has the exact same API, ' + 'but without the \"unstable_\" prefix.');\n    }\n  }\n\n  return createPortal$1(children, container, key);\n}\n\nvar Internals = {\n  // Keep in sync with ReactTestUtils.js, and ReactTestUtilsAct.js.\n  // This is an array for better minification.\n  Events: [getInstanceFromNode, getNodeFromInstance, getFiberCurrentPropsFromNode, enqueueStateRestore, restoreStateIfNeeded, flushPassiveEffects, // TODO: This is related to `act`, not events. Move to separate key?\n  IsThisRendererActing]\n};\nvar foundDevTools = injectIntoDevTools({\n  findFiberByHostInstance: getClosestInstanceFromNode,\n  bundleType:  1 ,\n  version: ReactVersion,\n  rendererPackageName: 'react-dom'\n});\n\n{\n  if (!foundDevTools && canUseDOM && window.top === window.self) {\n    // If we're in Chrome or Firefox, provide a download link if not installed.\n    if (navigator.userAgent.indexOf('Chrome') > -1 && navigator.userAgent.indexOf('Edge') === -1 || navigator.userAgent.indexOf('Firefox') > -1) {\n      var protocol = window.location.protocol; // Don't warn in exotic cases like chrome-extension://.\n\n      if (/^(https?|file):$/.test(protocol)) {\n        // eslint-disable-next-line react-internal/no-production-logging\n        console.info('%cDownload the React DevTools ' + 'for a better development experience: ' + 'https://reactjs.org/link/react-devtools' + (protocol === 'file:' ? '\\nYou might need to use a local HTTP server (instead of file://): ' + 'https://reactjs.org/link/react-devtools-faq' : ''), 'font-weight:bold');\n      }\n    }\n  }\n}\n\nexports.__SECRET_INTERNALS_DO_NOT_USE_OR_YOU_WILL_BE_FIRED = Internals;\nexports.createPortal = createPortal$1;\nexports.findDOMNode = findDOMNode;\nexports.flushSync = flushSync;\nexports.hydrate = hydrate;\nexports.render = render;\nexports.unmountComponentAtNode = unmountComponentAtNode;\nexports.unstable_batchedUpdates = batchedUpdates$1;\nexports.unstable_createPortal = unstable_createPortal;\nexports.unstable_renderSubtreeIntoContainer = renderSubtreeIntoContainer;\nexports.version = ReactVersion;\n  })();\n}\n","'use strict';\n\nfunction checkDCE() {\n  /* global __REACT_DEVTOOLS_GLOBAL_HOOK__ */\n  if (\n    typeof __REACT_DEVTOOLS_GLOBAL_HOOK__ === 'undefined' ||\n    typeof __REACT_DEVTOOLS_GLOBAL_HOOK__.checkDCE !== 'function'\n  ) {\n    return;\n  }\n  if (process.env.NODE_ENV !== 'production') {\n    // This branch is unreachable because this function is only called\n    // in production, but the condition is true only in development.\n    // Therefore if the branch is still here, dead code elimination wasn't\n    // properly applied.\n    // Don't change the message. React DevTools relies on it. Also make sure\n    // this message doesn't occur elsewhere in this function, or it will cause\n    // a false positive.\n    throw new Error('^_^');\n  }\n  try {\n    // Verify that the code above has been dead code eliminated (DCE'd).\n    __REACT_DEVTOOLS_GLOBAL_HOOK__.checkDCE(checkDCE);\n  } catch (err) {\n    // DevTools shouldn't crash React, no matter what.\n    // We should still report in case we break this code.\n    console.error(err);\n  }\n}\n\nif (process.env.NODE_ENV === 'production') {\n  // DCE check should happen before ReactDOM bundle executes so that\n  // DevTools can report bad minification during injection.\n  checkDCE();\n  module.exports = require('./cjs/react-dom.production.min.js');\n} else {\n  module.exports = require('./cjs/react-dom.development.js');\n}\n","/** @license React v16.13.1\n * react-is.development.js\n *\n * Copyright (c) Facebook, Inc. and its affiliates.\n *\n * This source code is licensed under the MIT license found in the\n * LICENSE file in the root directory of this source tree.\n */\n\n'use strict';\n\n\n\nif (process.env.NODE_ENV !== \"production\") {\n  (function() {\n'use strict';\n\n// The Symbol used to tag the ReactElement-like types. If there is no native Symbol\n// nor polyfill, then a plain number is used for performance.\nvar hasSymbol = typeof Symbol === 'function' && Symbol.for;\nvar REACT_ELEMENT_TYPE = hasSymbol ? Symbol.for('react.element') : 0xeac7;\nvar REACT_PORTAL_TYPE = hasSymbol ? Symbol.for('react.portal') : 0xeaca;\nvar REACT_FRAGMENT_TYPE = hasSymbol ? Symbol.for('react.fragment') : 0xeacb;\nvar REACT_STRICT_MODE_TYPE = hasSymbol ? Symbol.for('react.strict_mode') : 0xeacc;\nvar REACT_PROFILER_TYPE = hasSymbol ? Symbol.for('react.profiler') : 0xead2;\nvar REACT_PROVIDER_TYPE = hasSymbol ? Symbol.for('react.provider') : 0xeacd;\nvar REACT_CONTEXT_TYPE = hasSymbol ? Symbol.for('react.context') : 0xeace; // TODO: We don't use AsyncMode or ConcurrentMode anymore. They were temporary\n// (unstable) APIs that have been removed. Can we remove the symbols?\n\nvar REACT_ASYNC_MODE_TYPE = hasSymbol ? Symbol.for('react.async_mode') : 0xeacf;\nvar REACT_CONCURRENT_MODE_TYPE = hasSymbol ? Symbol.for('react.concurrent_mode') : 0xeacf;\nvar REACT_FORWARD_REF_TYPE = hasSymbol ? Symbol.for('react.forward_ref') : 0xead0;\nvar REACT_SUSPENSE_TYPE = hasSymbol ? Symbol.for('react.suspense') : 0xead1;\nvar REACT_SUSPENSE_LIST_TYPE = hasSymbol ? Symbol.for('react.suspense_list') : 0xead8;\nvar REACT_MEMO_TYPE = hasSymbol ? Symbol.for('react.memo') : 0xead3;\nvar REACT_LAZY_TYPE = hasSymbol ? Symbol.for('react.lazy') : 0xead4;\nvar REACT_BLOCK_TYPE = hasSymbol ? Symbol.for('react.block') : 0xead9;\nvar REACT_FUNDAMENTAL_TYPE = hasSymbol ? Symbol.for('react.fundamental') : 0xead5;\nvar REACT_RESPONDER_TYPE = hasSymbol ? Symbol.for('react.responder') : 0xead6;\nvar REACT_SCOPE_TYPE = hasSymbol ? Symbol.for('react.scope') : 0xead7;\n\nfunction isValidElementType(type) {\n  return typeof type === 'string' || typeof type === 'function' || // Note: its typeof might be other than 'symbol' or 'number' if it's a polyfill.\n  type === REACT_FRAGMENT_TYPE || type === REACT_CONCURRENT_MODE_TYPE || type === REACT_PROFILER_TYPE || type === REACT_STRICT_MODE_TYPE || type === REACT_SUSPENSE_TYPE || type === REACT_SUSPENSE_LIST_TYPE || typeof type === 'object' && type !== null && (type.$$typeof === REACT_LAZY_TYPE || type.$$typeof === REACT_MEMO_TYPE || type.$$typeof === REACT_PROVIDER_TYPE || type.$$typeof === REACT_CONTEXT_TYPE || type.$$typeof === REACT_FORWARD_REF_TYPE || type.$$typeof === REACT_FUNDAMENTAL_TYPE || type.$$typeof === REACT_RESPONDER_TYPE || type.$$typeof === REACT_SCOPE_TYPE || type.$$typeof === REACT_BLOCK_TYPE);\n}\n\nfunction typeOf(object) {\n  if (typeof object === 'object' && object !== null) {\n    var $$typeof = object.$$typeof;\n\n    switch ($$typeof) {\n      case REACT_ELEMENT_TYPE:\n        var type = object.type;\n\n        switch (type) {\n          case REACT_ASYNC_MODE_TYPE:\n          case REACT_CONCURRENT_MODE_TYPE:\n          case REACT_FRAGMENT_TYPE:\n          case REACT_PROFILER_TYPE:\n          case REACT_STRICT_MODE_TYPE:\n          case REACT_SUSPENSE_TYPE:\n            return type;\n\n          default:\n            var $$typeofType = type && type.$$typeof;\n\n            switch ($$typeofType) {\n              case REACT_CONTEXT_TYPE:\n              case REACT_FORWARD_REF_TYPE:\n              case REACT_LAZY_TYPE:\n              case REACT_MEMO_TYPE:\n              case REACT_PROVIDER_TYPE:\n                return $$typeofType;\n\n              default:\n                return $$typeof;\n            }\n\n        }\n\n      case REACT_PORTAL_TYPE:\n        return $$typeof;\n    }\n  }\n\n  return undefined;\n} // AsyncMode is deprecated along with isAsyncMode\n\nvar AsyncMode = REACT_ASYNC_MODE_TYPE;\nvar ConcurrentMode = REACT_CONCURRENT_MODE_TYPE;\nvar ContextConsumer = REACT_CONTEXT_TYPE;\nvar ContextProvider = REACT_PROVIDER_TYPE;\nvar Element = REACT_ELEMENT_TYPE;\nvar ForwardRef = REACT_FORWARD_REF_TYPE;\nvar Fragment = REACT_FRAGMENT_TYPE;\nvar Lazy = REACT_LAZY_TYPE;\nvar Memo = REACT_MEMO_TYPE;\nvar Portal = REACT_PORTAL_TYPE;\nvar Profiler = REACT_PROFILER_TYPE;\nvar StrictMode = REACT_STRICT_MODE_TYPE;\nvar Suspense = REACT_SUSPENSE_TYPE;\nvar hasWarnedAboutDeprecatedIsAsyncMode = false; // AsyncMode should be deprecated\n\nfunction isAsyncMode(object) {\n  {\n    if (!hasWarnedAboutDeprecatedIsAsyncMode) {\n      hasWarnedAboutDeprecatedIsAsyncMode = true; // Using console['warn'] to evade Babel and ESLint\n\n      console['warn']('The ReactIs.isAsyncMode() alias has been deprecated, ' + 'and will be removed in React 17+. Update your code to use ' + 'ReactIs.isConcurrentMode() instead. It has the exact same API.');\n    }\n  }\n\n  return isConcurrentMode(object) || typeOf(object) === REACT_ASYNC_MODE_TYPE;\n}\nfunction isConcurrentMode(object) {\n  return typeOf(object) === REACT_CONCURRENT_MODE_TYPE;\n}\nfunction isContextConsumer(object) {\n  return typeOf(object) === REACT_CONTEXT_TYPE;\n}\nfunction isContextProvider(object) {\n  return typeOf(object) === REACT_PROVIDER_TYPE;\n}\nfunction isElement(object) {\n  return typeof object === 'object' && object !== null && object.$$typeof === REACT_ELEMENT_TYPE;\n}\nfunction isForwardRef(object) {\n  return typeOf(object) === REACT_FORWARD_REF_TYPE;\n}\nfunction isFragment(object) {\n  return typeOf(object) === REACT_FRAGMENT_TYPE;\n}\nfunction isLazy(object) {\n  return typeOf(object) === REACT_LAZY_TYPE;\n}\nfunction isMemo(object) {\n  return typeOf(object) === REACT_MEMO_TYPE;\n}\nfunction isPortal(object) {\n  return typeOf(object) === REACT_PORTAL_TYPE;\n}\nfunction isProfiler(object) {\n  return typeOf(object) === REACT_PROFILER_TYPE;\n}\nfunction isStrictMode(object) {\n  return typeOf(object) === REACT_STRICT_MODE_TYPE;\n}\nfunction isSuspense(object) {\n  return typeOf(object) === REACT_SUSPENSE_TYPE;\n}\n\nexports.AsyncMode = AsyncMode;\nexports.ConcurrentMode = ConcurrentMode;\nexports.ContextConsumer = ContextConsumer;\nexports.ContextProvider = ContextProvider;\nexports.Element = Element;\nexports.ForwardRef = ForwardRef;\nexports.Fragment = Fragment;\nexports.Lazy = Lazy;\nexports.Memo = Memo;\nexports.Portal = Portal;\nexports.Profiler = Profiler;\nexports.StrictMode = StrictMode;\nexports.Suspense = Suspense;\nexports.isAsyncMode = isAsyncMode;\nexports.isConcurrentMode = isConcurrentMode;\nexports.isContextConsumer = isContextConsumer;\nexports.isContextProvider = isContextProvider;\nexports.isElement = isElement;\nexports.isForwardRef = isForwardRef;\nexports.isFragment = isFragment;\nexports.isLazy = isLazy;\nexports.isMemo = isMemo;\nexports.isPortal = isPortal;\nexports.isProfiler = isProfiler;\nexports.isStrictMode = isStrictMode;\nexports.isSuspense = isSuspense;\nexports.isValidElementType = isValidElementType;\nexports.typeOf = typeOf;\n  })();\n}\n","'use strict';\n\nif (process.env.NODE_ENV === 'production') {\n  module.exports = require('./cjs/react-is.production.min.js');\n} else {\n  module.exports = require('./cjs/react-is.development.js');\n}\n","/**\n * Copyright (c) 2013-present, Facebook, Inc.\n *\n * This source code is licensed under the MIT license found in the\n * LICENSE file in the root directory of this source tree.\n */\n\nfunction componentWillMount() {\n  // Call this.constructor.gDSFP to support sub-classes.\n  var state = this.constructor.getDerivedStateFromProps(this.props, this.state);\n  if (state !== null && state !== undefined) {\n    this.setState(state);\n  }\n}\n\nfunction componentWillReceiveProps(nextProps) {\n  // Call this.constructor.gDSFP to support sub-classes.\n  // Use the setState() updater to ensure state isn't stale in certain edge cases.\n  function updater(prevState) {\n    var state = this.constructor.getDerivedStateFromProps(nextProps, prevState);\n    return state !== null && state !== undefined ? state : null;\n  }\n  // Binding \"this\" is important for shallow renderer support.\n  this.setState(updater.bind(this));\n}\n\nfunction componentWillUpdate(nextProps, nextState) {\n  try {\n    var prevProps = this.props;\n    var prevState = this.state;\n    this.props = nextProps;\n    this.state = nextState;\n    this.__reactInternalSnapshotFlag = true;\n    this.__reactInternalSnapshot = this.getSnapshotBeforeUpdate(\n      prevProps,\n      prevState\n    );\n  } finally {\n    this.props = prevProps;\n    this.state = prevState;\n  }\n}\n\n// React may warn about cWM/cWRP/cWU methods being deprecated.\n// Add a flag to suppress these warnings for this special case.\ncomponentWillMount.__suppressDeprecationWarning = true;\ncomponentWillReceiveProps.__suppressDeprecationWarning = true;\ncomponentWillUpdate.__suppressDeprecationWarning = true;\n\nfunction polyfill(Component) {\n  var prototype = Component.prototype;\n\n  if (!prototype || !prototype.isReactComponent) {\n    throw new Error('Can only polyfill class components');\n  }\n\n  if (\n    typeof Component.getDerivedStateFromProps !== 'function' &&\n    typeof prototype.getSnapshotBeforeUpdate !== 'function'\n  ) {\n    return Component;\n  }\n\n  // If new component APIs are defined, \"unsafe\" lifecycles won't be called.\n  // Error if any of these lifecycles are present,\n  // Because they would work differently between older and newer (16.3+) versions of React.\n  var foundWillMountName = null;\n  var foundWillReceivePropsName = null;\n  var foundWillUpdateName = null;\n  if (typeof prototype.componentWillMount === 'function') {\n    foundWillMountName = 'componentWillMount';\n  } else if (typeof prototype.UNSAFE_componentWillMount === 'function') {\n    foundWillMountName = 'UNSAFE_componentWillMount';\n  }\n  if (typeof prototype.componentWillReceiveProps === 'function') {\n    foundWillReceivePropsName = 'componentWillReceiveProps';\n  } else if (typeof prototype.UNSAFE_componentWillReceiveProps === 'function') {\n    foundWillReceivePropsName = 'UNSAFE_componentWillReceiveProps';\n  }\n  if (typeof prototype.componentWillUpdate === 'function') {\n    foundWillUpdateName = 'componentWillUpdate';\n  } else if (typeof prototype.UNSAFE_componentWillUpdate === 'function') {\n    foundWillUpdateName = 'UNSAFE_componentWillUpdate';\n  }\n  if (\n    foundWillMountName !== null ||\n    foundWillReceivePropsName !== null ||\n    foundWillUpdateName !== null\n  ) {\n    var componentName = Component.displayName || Component.name;\n    var newApiName =\n      typeof Component.getDerivedStateFromProps === 'function'\n        ? 'getDerivedStateFromProps()'\n        : 'getSnapshotBeforeUpdate()';\n\n    throw Error(\n      'Unsafe legacy lifecycles will not be called for components using new component APIs.\\n\\n' +\n        componentName +\n        ' uses ' +\n        newApiName +\n        ' but also contains the following legacy lifecycles:' +\n        (foundWillMountName !== null ? '\\n  ' + foundWillMountName : '') +\n        (foundWillReceivePropsName !== null\n          ? '\\n  ' + foundWillReceivePropsName\n          : '') +\n        (foundWillUpdateName !== null ? '\\n  ' + foundWillUpdateName : '') +\n        '\\n\\nThe above lifecycles should be removed. Learn more about this warning here:\\n' +\n        'https://fb.me/react-async-component-lifecycle-hooks'\n    );\n  }\n\n  // React <= 16.2 does not support static getDerivedStateFromProps.\n  // As a workaround, use cWM and cWRP to invoke the new static lifecycle.\n  // Newer versions of React will ignore these lifecycles if gDSFP exists.\n  if (typeof Component.getDerivedStateFromProps === 'function') {\n    prototype.componentWillMount = componentWillMount;\n    prototype.componentWillReceiveProps = componentWillReceiveProps;\n  }\n\n  // React <= 16.2 does not support getSnapshotBeforeUpdate.\n  // As a workaround, use cWU to invoke the new lifecycle.\n  // Newer versions of React will ignore that lifecycle if gSBU exists.\n  if (typeof prototype.getSnapshotBeforeUpdate === 'function') {\n    if (typeof prototype.componentDidUpdate !== 'function') {\n      throw new Error(\n        'Cannot polyfill getSnapshotBeforeUpdate() for components that do not define componentDidUpdate() on the prototype'\n      );\n    }\n\n    prototype.componentWillUpdate = componentWillUpdate;\n\n    var componentDidUpdate = prototype.componentDidUpdate;\n\n    prototype.componentDidUpdate = function componentDidUpdatePolyfill(\n      prevProps,\n      prevState,\n      maybeSnapshot\n    ) {\n      // 16.3+ will not execute our will-update method;\n      // It will pass a snapshot value to did-update though.\n      // Older versions will require our polyfilled will-update value.\n      // We need to handle both cases, but can't just check for the presence of \"maybeSnapshot\",\n      // Because for <= 15.x versions this might be a \"prevContext\" object.\n      // We also can't just check \"__reactInternalSnapshot\",\n      // Because get-snapshot might return a falsy value.\n      // So check for the explicit __reactInternalSnapshotFlag flag to determine behavior.\n      var snapshot = this.__reactInternalSnapshotFlag\n        ? this.__reactInternalSnapshot\n        : maybeSnapshot;\n\n      componentDidUpdate.call(this, prevProps, prevState, snapshot);\n    };\n  }\n\n  return Component;\n}\n\nexport { polyfill };\n","\"use strict\";\n\nObject.defineProperty(exports, \"__esModule\", {\n  value: true\n});\nexports.bodyOpenClassName = exports.portalClassName = undefined;\n\nvar _extends = Object.assign || function (target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i]; for (var key in source) { if (Object.prototype.hasOwnProperty.call(source, key)) { target[key] = source[key]; } } } return target; };\n\nvar _createClass = function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if (\"value\" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; }();\n\nvar _react = require(\"react\");\n\nvar _react2 = _interopRequireDefault(_react);\n\nvar _reactDom = require(\"react-dom\");\n\nvar _reactDom2 = _interopRequireDefault(_reactDom);\n\nvar _propTypes = require(\"prop-types\");\n\nvar _propTypes2 = _interopRequireDefault(_propTypes);\n\nvar _ModalPortal = require(\"./ModalPortal\");\n\nvar _ModalPortal2 = _interopRequireDefault(_ModalPortal);\n\nvar _ariaAppHider = require(\"../helpers/ariaAppHider\");\n\nvar ariaAppHider = _interopRequireWildcard(_ariaAppHider);\n\nvar _safeHTMLElement = require(\"../helpers/safeHTMLElement\");\n\nvar _safeHTMLElement2 = _interopRequireDefault(_safeHTMLElement);\n\nvar _reactLifecyclesCompat = require(\"react-lifecycles-compat\");\n\nfunction _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } else { var newObj = {}; if (obj != null) { for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) newObj[key] = obj[key]; } } newObj.default = obj; return newObj; } }\n\nfunction _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }\n\nfunction _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError(\"Cannot call a class as a function\"); } }\n\nfunction _possibleConstructorReturn(self, call) { if (!self) { throw new ReferenceError(\"this hasn't been initialised - super() hasn't been called\"); } return call && (typeof call === \"object\" || typeof call === \"function\") ? call : self; }\n\nfunction _inherits(subClass, superClass) { if (typeof superClass !== \"function\" && superClass !== null) { throw new TypeError(\"Super expression must either be null or a function, not \" + typeof superClass); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, enumerable: false, writable: true, configurable: true } }); if (superClass) Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) : subClass.__proto__ = superClass; }\n\nvar portalClassName = exports.portalClassName = \"ReactModalPortal\";\nvar bodyOpenClassName = exports.bodyOpenClassName = \"ReactModal__Body--open\";\n\nvar isReact16 = _safeHTMLElement.canUseDOM && _reactDom2.default.createPortal !== undefined;\n\nvar createHTMLElement = function createHTMLElement(name) {\n  return document.createElement(name);\n};\n\nvar getCreatePortal = function getCreatePortal() {\n  return isReact16 ? _reactDom2.default.createPortal : _reactDom2.default.unstable_renderSubtreeIntoContainer;\n};\n\nfunction getParentElement(parentSelector) {\n  return parentSelector();\n}\n\nvar Modal = function (_Component) {\n  _inherits(Modal, _Component);\n\n  function Modal() {\n    var _ref;\n\n    var _temp, _this, _ret;\n\n    _classCallCheck(this, Modal);\n\n    for (var _len = arguments.length, args = Array(_len), _key = 0; _key < _len; _key++) {\n      args[_key] = arguments[_key];\n    }\n\n    return _ret = (_temp = (_this = _possibleConstructorReturn(this, (_ref = Modal.__proto__ || Object.getPrototypeOf(Modal)).call.apply(_ref, [this].concat(args))), _this), _this.removePortal = function () {\n      !isReact16 && _reactDom2.default.unmountComponentAtNode(_this.node);\n      var parent = getParentElement(_this.props.parentSelector);\n      if (parent && parent.contains(_this.node)) {\n        parent.removeChild(_this.node);\n      } else {\n        // eslint-disable-next-line no-console\n        console.warn('React-Modal: \"parentSelector\" prop did not returned any DOM ' + \"element. Make sure that the parent element is unmounted to \" + \"avoid any memory leaks.\");\n      }\n    }, _this.portalRef = function (ref) {\n      _this.portal = ref;\n    }, _this.renderPortal = function (props) {\n      var createPortal = getCreatePortal();\n      var portal = createPortal(_this, _react2.default.createElement(_ModalPortal2.default, _extends({ defaultStyles: Modal.defaultStyles }, props)), _this.node);\n      _this.portalRef(portal);\n    }, _temp), _possibleConstructorReturn(_this, _ret);\n  }\n\n  _createClass(Modal, [{\n    key: \"componentDidMount\",\n    value: function componentDidMount() {\n      if (!_safeHTMLElement.canUseDOM) return;\n\n      if (!isReact16) {\n        this.node = createHTMLElement(\"div\");\n      }\n      this.node.className = this.props.portalClassName;\n\n      var parent = getParentElement(this.props.parentSelector);\n      parent.appendChild(this.node);\n\n      !isReact16 && this.renderPortal(this.props);\n    }\n  }, {\n    key: \"getSnapshotBeforeUpdate\",\n    value: function getSnapshotBeforeUpdate(prevProps) {\n      var prevParent = getParentElement(prevProps.parentSelector);\n      var nextParent = getParentElement(this.props.parentSelector);\n      return { prevParent: prevParent, nextParent: nextParent };\n    }\n  }, {\n    key: \"componentDidUpdate\",\n    value: function componentDidUpdate(prevProps, _, snapshot) {\n      if (!_safeHTMLElement.canUseDOM) return;\n      var _props = this.props,\n          isOpen = _props.isOpen,\n          portalClassName = _props.portalClassName;\n\n\n      if (prevProps.portalClassName !== portalClassName) {\n        this.node.className = portalClassName;\n      }\n\n      var prevParent = snapshot.prevParent,\n          nextParent = snapshot.nextParent;\n\n      if (nextParent !== prevParent) {\n        prevParent.removeChild(this.node);\n        nextParent.appendChild(this.node);\n      }\n\n      // Stop unnecessary renders if modal is remaining closed\n      if (!prevProps.isOpen && !isOpen) return;\n\n      !isReact16 && this.renderPortal(this.props);\n    }\n  }, {\n    key: \"componentWillUnmount\",\n    value: function componentWillUnmount() {\n      if (!_safeHTMLElement.canUseDOM || !this.node || !this.portal) return;\n\n      var state = this.portal.state;\n      var now = Date.now();\n      var closesAt = state.isOpen && this.props.closeTimeoutMS && (state.closesAt || now + this.props.closeTimeoutMS);\n\n      if (closesAt) {\n        if (!state.beforeClose) {\n          this.portal.closeWithTimeout();\n        }\n\n        setTimeout(this.removePortal, closesAt - now);\n      } else {\n        this.removePortal();\n      }\n    }\n  }, {\n    key: \"render\",\n    value: function render() {\n      if (!_safeHTMLElement.canUseDOM || !isReact16) {\n        return null;\n      }\n\n      if (!this.node && isReact16) {\n        this.node = createHTMLElement(\"div\");\n      }\n\n      var createPortal = getCreatePortal();\n      return createPortal(_react2.default.createElement(_ModalPortal2.default, _extends({\n        ref: this.portalRef,\n        defaultStyles: Modal.defaultStyles\n      }, this.props)), this.node);\n    }\n  }], [{\n    key: \"setAppElement\",\n    value: function setAppElement(element) {\n      ariaAppHider.setElement(element);\n    }\n\n    /* eslint-disable react/no-unused-prop-types */\n\n    /* eslint-enable react/no-unused-prop-types */\n\n  }]);\n\n  return Modal;\n}(_react.Component);\n\nModal.propTypes = {\n  isOpen: _propTypes2.default.bool.isRequired,\n  style: _propTypes2.default.shape({\n    content: _propTypes2.default.object,\n    overlay: _propTypes2.default.object\n  }),\n  portalClassName: _propTypes2.default.string,\n  bodyOpenClassName: _propTypes2.default.string,\n  htmlOpenClassName: _propTypes2.default.string,\n  className: _propTypes2.default.oneOfType([_propTypes2.default.string, _propTypes2.default.shape({\n    base: _propTypes2.default.string.isRequired,\n    afterOpen: _propTypes2.default.string.isRequired,\n    beforeClose: _propTypes2.default.string.isRequired\n  })]),\n  overlayClassName: _propTypes2.default.oneOfType([_propTypes2.default.string, _propTypes2.default.shape({\n    base: _propTypes2.default.string.isRequired,\n    afterOpen: _propTypes2.default.string.isRequired,\n    beforeClose: _propTypes2.default.string.isRequired\n  })]),\n  appElement: _propTypes2.default.oneOfType([_propTypes2.default.instanceOf(_safeHTMLElement2.default), _propTypes2.default.instanceOf(_safeHTMLElement.SafeHTMLCollection), _propTypes2.default.instanceOf(_safeHTMLElement.SafeNodeList), _propTypes2.default.arrayOf(_propTypes2.default.instanceOf(_safeHTMLElement2.default))]),\n  onAfterOpen: _propTypes2.default.func,\n  onRequestClose: _propTypes2.default.func,\n  closeTimeoutMS: _propTypes2.default.number,\n  ariaHideApp: _propTypes2.default.bool,\n  shouldFocusAfterRender: _propTypes2.default.bool,\n  shouldCloseOnOverlayClick: _propTypes2.default.bool,\n  shouldReturnFocusAfterClose: _propTypes2.default.bool,\n  preventScroll: _propTypes2.default.bool,\n  parentSelector: _propTypes2.default.func,\n  aria: _propTypes2.default.object,\n  data: _propTypes2.default.object,\n  role: _propTypes2.default.string,\n  contentLabel: _propTypes2.default.string,\n  shouldCloseOnEsc: _propTypes2.default.bool,\n  overlayRef: _propTypes2.default.func,\n  contentRef: _propTypes2.default.func,\n  id: _propTypes2.default.string,\n  overlayElement: _propTypes2.default.func,\n  contentElement: _propTypes2.default.func\n};\nModal.defaultProps = {\n  isOpen: false,\n  portalClassName: portalClassName,\n  bodyOpenClassName: bodyOpenClassName,\n  role: \"dialog\",\n  ariaHideApp: true,\n  closeTimeoutMS: 0,\n  shouldFocusAfterRender: true,\n  shouldCloseOnEsc: true,\n  shouldCloseOnOverlayClick: true,\n  shouldReturnFocusAfterClose: true,\n  preventScroll: false,\n  parentSelector: function parentSelector() {\n    return document.body;\n  },\n  overlayElement: function overlayElement(props, contentEl) {\n    return _react2.default.createElement(\n      \"div\",\n      props,\n      contentEl\n    );\n  },\n  contentElement: function contentElement(props, children) {\n    return _react2.default.createElement(\n      \"div\",\n      props,\n      children\n    );\n  }\n};\nModal.defaultStyles = {\n  overlay: {\n    position: \"fixed\",\n    top: 0,\n    left: 0,\n    right: 0,\n    bottom: 0,\n    backgroundColor: \"rgba(255, 255, 255, 0.75)\"\n  },\n  content: {\n    position: \"absolute\",\n    top: \"40px\",\n    left: \"40px\",\n    right: \"40px\",\n    bottom: \"40px\",\n    border: \"1px solid #ccc\",\n    background: \"#fff\",\n    overflow: \"auto\",\n    WebkitOverflowScrolling: \"touch\",\n    borderRadius: \"4px\",\n    outline: \"none\",\n    padding: \"20px\"\n  }\n};\n\n\n(0, _reactLifecyclesCompat.polyfill)(Modal);\n\nif (process.env.NODE_ENV !== \"production\") {\n  Modal.setCreateHTMLElement = function (fn) {\n    return createHTMLElement = fn;\n  };\n}\n\nexports.default = Modal;","\"use strict\";\n\nObject.defineProperty(exports, \"__esModule\", {\n  value: true\n});\n\nvar _extends = Object.assign || function (target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i]; for (var key in source) { if (Object.prototype.hasOwnProperty.call(source, key)) { target[key] = source[key]; } } } return target; };\n\nvar _typeof = typeof Symbol === \"function\" && typeof Symbol.iterator === \"symbol\" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === \"function\" && obj.constructor === Symbol && obj !== Symbol.prototype ? \"symbol\" : typeof obj; };\n\nvar _createClass = function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if (\"value\" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; }();\n\nvar _react = require(\"react\");\n\nvar _propTypes = require(\"prop-types\");\n\nvar _propTypes2 = _interopRequireDefault(_propTypes);\n\nvar _focusManager = require(\"../helpers/focusManager\");\n\nvar focusManager = _interopRequireWildcard(_focusManager);\n\nvar _scopeTab = require(\"../helpers/scopeTab\");\n\nvar _scopeTab2 = _interopRequireDefault(_scopeTab);\n\nvar _ariaAppHider = require(\"../helpers/ariaAppHider\");\n\nvar ariaAppHider = _interopRequireWildcard(_ariaAppHider);\n\nvar _classList = require(\"../helpers/classList\");\n\nvar classList = _interopRequireWildcard(_classList);\n\nvar _safeHTMLElement = require(\"../helpers/safeHTMLElement\");\n\nvar _safeHTMLElement2 = _interopRequireDefault(_safeHTMLElement);\n\nvar _portalOpenInstances = require(\"../helpers/portalOpenInstances\");\n\nvar _portalOpenInstances2 = _interopRequireDefault(_portalOpenInstances);\n\nrequire(\"../helpers/bodyTrap\");\n\nfunction _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } else { var newObj = {}; if (obj != null) { for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) newObj[key] = obj[key]; } } newObj.default = obj; return newObj; } }\n\nfunction _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }\n\nfunction _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError(\"Cannot call a class as a function\"); } }\n\nfunction _possibleConstructorReturn(self, call) { if (!self) { throw new ReferenceError(\"this hasn't been initialised - super() hasn't been called\"); } return call && (typeof call === \"object\" || typeof call === \"function\") ? call : self; }\n\nfunction _inherits(subClass, superClass) { if (typeof superClass !== \"function\" && superClass !== null) { throw new TypeError(\"Super expression must either be null or a function, not \" + typeof superClass); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, enumerable: false, writable: true, configurable: true } }); if (superClass) Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) : subClass.__proto__ = superClass; }\n\n// so that our CSS is statically analyzable\nvar CLASS_NAMES = {\n  overlay: \"ReactModal__Overlay\",\n  content: \"ReactModal__Content\"\n};\n\n/**\n * We need to support the deprecated `KeyboardEvent.keyCode` in addition to\n * `KeyboardEvent.code` for apps that still support IE11. Can be removed when\n * `react-modal` only supports React >18 (which dropped IE support).\n */\nvar isTabKey = function isTabKey(event) {\n  return event.code === \"Tab\" || event.keyCode === 9;\n};\nvar isEscKey = function isEscKey(event) {\n  return event.code === \"Escape\" || event.keyCode === 27;\n};\n\nvar ariaHiddenInstances = 0;\n\nvar ModalPortal = function (_Component) {\n  _inherits(ModalPortal, _Component);\n\n  function ModalPortal(props) {\n    _classCallCheck(this, ModalPortal);\n\n    var _this = _possibleConstructorReturn(this, (ModalPortal.__proto__ || Object.getPrototypeOf(ModalPortal)).call(this, props));\n\n    _this.setOverlayRef = function (overlay) {\n      _this.overlay = overlay;\n      _this.props.overlayRef && _this.props.overlayRef(overlay);\n    };\n\n    _this.setContentRef = function (content) {\n      _this.content = content;\n      _this.props.contentRef && _this.props.contentRef(content);\n    };\n\n    _this.afterClose = function () {\n      var _this$props = _this.props,\n          appElement = _this$props.appElement,\n          ariaHideApp = _this$props.ariaHideApp,\n          htmlOpenClassName = _this$props.htmlOpenClassName,\n          bodyOpenClassName = _this$props.bodyOpenClassName,\n          parentSelector = _this$props.parentSelector;\n\n\n      var parentDocument = parentSelector && parentSelector().ownerDocument || document;\n\n      // Remove classes.\n      bodyOpenClassName && classList.remove(parentDocument.body, bodyOpenClassName);\n\n      htmlOpenClassName && classList.remove(parentDocument.getElementsByTagName(\"html\")[0], htmlOpenClassName);\n\n      // Reset aria-hidden attribute if all modals have been removed\n      if (ariaHideApp && ariaHiddenInstances > 0) {\n        ariaHiddenInstances -= 1;\n\n        if (ariaHiddenInstances === 0) {\n          ariaAppHider.show(appElement);\n        }\n      }\n\n      if (_this.props.shouldFocusAfterRender) {\n        if (_this.props.shouldReturnFocusAfterClose) {\n          focusManager.returnFocus(_this.props.preventScroll);\n          focusManager.teardownScopedFocus();\n        } else {\n          focusManager.popWithoutFocus();\n        }\n      }\n\n      if (_this.props.onAfterClose) {\n        _this.props.onAfterClose();\n      }\n\n      _portalOpenInstances2.default.deregister(_this);\n    };\n\n    _this.open = function () {\n      _this.beforeOpen();\n      if (_this.state.afterOpen && _this.state.beforeClose) {\n        clearTimeout(_this.closeTimer);\n        _this.setState({ beforeClose: false });\n      } else {\n        if (_this.props.shouldFocusAfterRender) {\n          focusManager.setupScopedFocus(_this.node);\n          focusManager.markForFocusLater();\n        }\n\n        _this.setState({ isOpen: true }, function () {\n          _this.openAnimationFrame = requestAnimationFrame(function () {\n            _this.setState({ afterOpen: true });\n\n            if (_this.props.isOpen && _this.props.onAfterOpen) {\n              _this.props.onAfterOpen({\n                overlayEl: _this.overlay,\n                contentEl: _this.content\n              });\n            }\n          });\n        });\n      }\n    };\n\n    _this.close = function () {\n      if (_this.props.closeTimeoutMS > 0) {\n        _this.closeWithTimeout();\n      } else {\n        _this.closeWithoutTimeout();\n      }\n    };\n\n    _this.focusContent = function () {\n      return _this.content && !_this.contentHasFocus() && _this.content.focus({ preventScroll: true });\n    };\n\n    _this.closeWithTimeout = function () {\n      var closesAt = Date.now() + _this.props.closeTimeoutMS;\n      _this.setState({ beforeClose: true, closesAt: closesAt }, function () {\n        _this.closeTimer = setTimeout(_this.closeWithoutTimeout, _this.state.closesAt - Date.now());\n      });\n    };\n\n    _this.closeWithoutTimeout = function () {\n      _this.setState({\n        beforeClose: false,\n        isOpen: false,\n        afterOpen: false,\n        closesAt: null\n      }, _this.afterClose);\n    };\n\n    _this.handleKeyDown = function (event) {\n      if (isTabKey(event)) {\n        (0, _scopeTab2.default)(_this.content, event);\n      }\n\n      if (_this.props.shouldCloseOnEsc && isEscKey(event)) {\n        event.stopPropagation();\n        _this.requestClose(event);\n      }\n    };\n\n    _this.handleOverlayOnClick = function (event) {\n      if (_this.shouldClose === null) {\n        _this.shouldClose = true;\n      }\n\n      if (_this.shouldClose && _this.props.shouldCloseOnOverlayClick) {\n        if (_this.ownerHandlesClose()) {\n          _this.requestClose(event);\n        } else {\n          _this.focusContent();\n        }\n      }\n      _this.shouldClose = null;\n    };\n\n    _this.handleContentOnMouseUp = function () {\n      _this.shouldClose = false;\n    };\n\n    _this.handleOverlayOnMouseDown = function (event) {\n      if (!_this.props.shouldCloseOnOverlayClick && event.target == _this.overlay) {\n        event.preventDefault();\n      }\n    };\n\n    _this.handleContentOnClick = function () {\n      _this.shouldClose = false;\n    };\n\n    _this.handleContentOnMouseDown = function () {\n      _this.shouldClose = false;\n    };\n\n    _this.requestClose = function (event) {\n      return _this.ownerHandlesClose() && _this.props.onRequestClose(event);\n    };\n\n    _this.ownerHandlesClose = function () {\n      return _this.props.onRequestClose;\n    };\n\n    _this.shouldBeClosed = function () {\n      return !_this.state.isOpen && !_this.state.beforeClose;\n    };\n\n    _this.contentHasFocus = function () {\n      return document.activeElement === _this.content || _this.content.contains(document.activeElement);\n    };\n\n    _this.buildClassName = function (which, additional) {\n      var classNames = (typeof additional === \"undefined\" ? \"undefined\" : _typeof(additional)) === \"object\" ? additional : {\n        base: CLASS_NAMES[which],\n        afterOpen: CLASS_NAMES[which] + \"--after-open\",\n        beforeClose: CLASS_NAMES[which] + \"--before-close\"\n      };\n      var className = classNames.base;\n      if (_this.state.afterOpen) {\n        className = className + \" \" + classNames.afterOpen;\n      }\n      if (_this.state.beforeClose) {\n        className = className + \" \" + classNames.beforeClose;\n      }\n      return typeof additional === \"string\" && additional ? className + \" \" + additional : className;\n    };\n\n    _this.attributesFromObject = function (prefix, items) {\n      return Object.keys(items).reduce(function (acc, name) {\n        acc[prefix + \"-\" + name] = items[name];\n        return acc;\n      }, {});\n    };\n\n    _this.state = {\n      afterOpen: false,\n      beforeClose: false\n    };\n\n    _this.shouldClose = null;\n    _this.moveFromContentToOverlay = null;\n    return _this;\n  }\n\n  _createClass(ModalPortal, [{\n    key: \"componentDidMount\",\n    value: function componentDidMount() {\n      if (this.props.isOpen) {\n        this.open();\n      }\n    }\n  }, {\n    key: \"componentDidUpdate\",\n    value: function componentDidUpdate(prevProps, prevState) {\n      if (process.env.NODE_ENV !== \"production\") {\n        if (prevProps.bodyOpenClassName !== this.props.bodyOpenClassName) {\n          // eslint-disable-next-line no-console\n          console.warn('React-Modal: \"bodyOpenClassName\" prop has been modified. ' + \"This may cause unexpected behavior when multiple modals are open.\");\n        }\n        if (prevProps.htmlOpenClassName !== this.props.htmlOpenClassName) {\n          // eslint-disable-next-line no-console\n          console.warn('React-Modal: \"htmlOpenClassName\" prop has been modified. ' + \"This may cause unexpected behavior when multiple modals are open.\");\n        }\n      }\n\n      if (this.props.isOpen && !prevProps.isOpen) {\n        this.open();\n      } else if (!this.props.isOpen && prevProps.isOpen) {\n        this.close();\n      }\n\n      // Focus only needs to be set once when the modal is being opened\n      if (this.props.shouldFocusAfterRender && this.state.isOpen && !prevState.isOpen) {\n        this.focusContent();\n      }\n    }\n  }, {\n    key: \"componentWillUnmount\",\n    value: function componentWillUnmount() {\n      if (this.state.isOpen) {\n        this.afterClose();\n      }\n      clearTimeout(this.closeTimer);\n      cancelAnimationFrame(this.openAnimationFrame);\n    }\n  }, {\n    key: \"beforeOpen\",\n    value: function beforeOpen() {\n      var _props = this.props,\n          appElement = _props.appElement,\n          ariaHideApp = _props.ariaHideApp,\n          htmlOpenClassName = _props.htmlOpenClassName,\n          bodyOpenClassName = _props.bodyOpenClassName,\n          parentSelector = _props.parentSelector;\n\n\n      var parentDocument = parentSelector && parentSelector().ownerDocument || document;\n\n      // Add classes.\n      bodyOpenClassName && classList.add(parentDocument.body, bodyOpenClassName);\n\n      htmlOpenClassName && classList.add(parentDocument.getElementsByTagName(\"html\")[0], htmlOpenClassName);\n\n      if (ariaHideApp) {\n        ariaHiddenInstances += 1;\n        ariaAppHider.hide(appElement);\n      }\n\n      _portalOpenInstances2.default.register(this);\n    }\n\n    // Don't steal focus from inner elements\n\n  }, {\n    key: \"render\",\n    value: function render() {\n      var _props2 = this.props,\n          id = _props2.id,\n          className = _props2.className,\n          overlayClassName = _props2.overlayClassName,\n          defaultStyles = _props2.defaultStyles,\n          children = _props2.children;\n\n      var contentStyles = className ? {} : defaultStyles.content;\n      var overlayStyles = overlayClassName ? {} : defaultStyles.overlay;\n\n      if (this.shouldBeClosed()) {\n        return null;\n      }\n\n      var overlayProps = {\n        ref: this.setOverlayRef,\n        className: this.buildClassName(\"overlay\", overlayClassName),\n        style: _extends({}, overlayStyles, this.props.style.overlay),\n        onClick: this.handleOverlayOnClick,\n        onMouseDown: this.handleOverlayOnMouseDown\n      };\n\n      var contentProps = _extends({\n        id: id,\n        ref: this.setContentRef,\n        style: _extends({}, contentStyles, this.props.style.content),\n        className: this.buildClassName(\"content\", className),\n        tabIndex: \"-1\",\n        onKeyDown: this.handleKeyDown,\n        onMouseDown: this.handleContentOnMouseDown,\n        onMouseUp: this.handleContentOnMouseUp,\n        onClick: this.handleContentOnClick,\n        role: this.props.role,\n        \"aria-label\": this.props.contentLabel\n      }, this.attributesFromObject(\"aria\", _extends({ modal: true }, this.props.aria)), this.attributesFromObject(\"data\", this.props.data || {}), {\n        \"data-testid\": this.props.testId\n      });\n\n      var contentElement = this.props.contentElement(contentProps, children);\n      return this.props.overlayElement(overlayProps, contentElement);\n    }\n  }]);\n\n  return ModalPortal;\n}(_react.Component);\n\nModalPortal.defaultProps = {\n  style: {\n    overlay: {},\n    content: {}\n  },\n  defaultStyles: {}\n};\nModalPortal.propTypes = {\n  isOpen: _propTypes2.default.bool.isRequired,\n  defaultStyles: _propTypes2.default.shape({\n    content: _propTypes2.default.object,\n    overlay: _propTypes2.default.object\n  }),\n  style: _propTypes2.default.shape({\n    content: _propTypes2.default.object,\n    overlay: _propTypes2.default.object\n  }),\n  className: _propTypes2.default.oneOfType([_propTypes2.default.string, _propTypes2.default.object]),\n  overlayClassName: _propTypes2.default.oneOfType([_propTypes2.default.string, _propTypes2.default.object]),\n  parentSelector: _propTypes2.default.func,\n  bodyOpenClassName: _propTypes2.default.string,\n  htmlOpenClassName: _propTypes2.default.string,\n  ariaHideApp: _propTypes2.default.bool,\n  appElement: _propTypes2.default.oneOfType([_propTypes2.default.instanceOf(_safeHTMLElement2.default), _propTypes2.default.instanceOf(_safeHTMLElement.SafeHTMLCollection), _propTypes2.default.instanceOf(_safeHTMLElement.SafeNodeList), _propTypes2.default.arrayOf(_propTypes2.default.instanceOf(_safeHTMLElement2.default))]),\n  onAfterOpen: _propTypes2.default.func,\n  onAfterClose: _propTypes2.default.func,\n  onRequestClose: _propTypes2.default.func,\n  closeTimeoutMS: _propTypes2.default.number,\n  shouldFocusAfterRender: _propTypes2.default.bool,\n  shouldCloseOnOverlayClick: _propTypes2.default.bool,\n  shouldReturnFocusAfterClose: _propTypes2.default.bool,\n  preventScroll: _propTypes2.default.bool,\n  role: _propTypes2.default.string,\n  contentLabel: _propTypes2.default.string,\n  aria: _propTypes2.default.object,\n  data: _propTypes2.default.object,\n  children: _propTypes2.default.node,\n  shouldCloseOnEsc: _propTypes2.default.bool,\n  overlayRef: _propTypes2.default.func,\n  contentRef: _propTypes2.default.func,\n  id: _propTypes2.default.string,\n  overlayElement: _propTypes2.default.func,\n  contentElement: _propTypes2.default.func,\n  testId: _propTypes2.default.string\n};\nexports.default = ModalPortal;\nmodule.exports = exports[\"default\"];","\"use strict\";\n\nObject.defineProperty(exports, \"__esModule\", {\n  value: true\n});\nexports.resetState = resetState;\nexports.log = log;\nexports.assertNodeList = assertNodeList;\nexports.setElement = setElement;\nexports.validateElement = validateElement;\nexports.hide = hide;\nexports.show = show;\nexports.documentNotReadyOrSSRTesting = documentNotReadyOrSSRTesting;\n\nvar _warning = require(\"warning\");\n\nvar _warning2 = _interopRequireDefault(_warning);\n\nvar _safeHTMLElement = require(\"./safeHTMLElement\");\n\nfunction _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }\n\nvar globalElement = null;\n\n/* eslint-disable no-console */\n/* istanbul ignore next */\nfunction resetState() {\n  if (globalElement) {\n    if (globalElement.removeAttribute) {\n      globalElement.removeAttribute(\"aria-hidden\");\n    } else if (globalElement.length != null) {\n      globalElement.forEach(function (element) {\n        return element.removeAttribute(\"aria-hidden\");\n      });\n    } else {\n      document.querySelectorAll(globalElement).forEach(function (element) {\n        return element.removeAttribute(\"aria-hidden\");\n      });\n    }\n  }\n  globalElement = null;\n}\n\n/* istanbul ignore next */\nfunction log() {\n  if (process.env.NODE_ENV !== \"production\") {\n    var check = globalElement || {};\n    console.log(\"ariaAppHider ----------\");\n    console.log(check.nodeName, check.className, check.id);\n    console.log(\"end ariaAppHider ----------\");\n  }\n}\n/* eslint-enable no-console */\n\nfunction assertNodeList(nodeList, selector) {\n  if (!nodeList || !nodeList.length) {\n    throw new Error(\"react-modal: No elements were found for selector \" + selector + \".\");\n  }\n}\n\nfunction setElement(element) {\n  var useElement = element;\n  if (typeof useElement === \"string\" && _safeHTMLElement.canUseDOM) {\n    var el = document.querySelectorAll(useElement);\n    assertNodeList(el, useElement);\n    useElement = el;\n  }\n  globalElement = useElement || globalElement;\n  return globalElement;\n}\n\nfunction validateElement(appElement) {\n  var el = appElement || globalElement;\n  if (el) {\n    return Array.isArray(el) || el instanceof HTMLCollection || el instanceof NodeList ? el : [el];\n  } else {\n    (0, _warning2.default)(false, [\"react-modal: App element is not defined.\", \"Please use `Modal.setAppElement(el)` or set `appElement={el}`.\", \"This is needed so screen readers don't see main content\", \"when modal is opened. It is not recommended, but you can opt-out\", \"by setting `ariaHideApp={false}`.\"].join(\" \"));\n\n    return [];\n  }\n}\n\nfunction hide(appElement) {\n  var _iteratorNormalCompletion = true;\n  var _didIteratorError = false;\n  var _iteratorError = undefined;\n\n  try {\n    for (var _iterator = validateElement(appElement)[Symbol.iterator](), _step; !(_iteratorNormalCompletion = (_step = _iterator.next()).done); _iteratorNormalCompletion = true) {\n      var el = _step.value;\n\n      el.setAttribute(\"aria-hidden\", \"true\");\n    }\n  } catch (err) {\n    _didIteratorError = true;\n    _iteratorError = err;\n  } finally {\n    try {\n      if (!_iteratorNormalCompletion && _iterator.return) {\n        _iterator.return();\n      }\n    } finally {\n      if (_didIteratorError) {\n        throw _iteratorError;\n      }\n    }\n  }\n}\n\nfunction show(appElement) {\n  var _iteratorNormalCompletion2 = true;\n  var _didIteratorError2 = false;\n  var _iteratorError2 = undefined;\n\n  try {\n    for (var _iterator2 = validateElement(appElement)[Symbol.iterator](), _step2; !(_iteratorNormalCompletion2 = (_step2 = _iterator2.next()).done); _iteratorNormalCompletion2 = true) {\n      var el = _step2.value;\n\n      el.removeAttribute(\"aria-hidden\");\n    }\n  } catch (err) {\n    _didIteratorError2 = true;\n    _iteratorError2 = err;\n  } finally {\n    try {\n      if (!_iteratorNormalCompletion2 && _iterator2.return) {\n        _iterator2.return();\n      }\n    } finally {\n      if (_didIteratorError2) {\n        throw _iteratorError2;\n      }\n    }\n  }\n}\n\nfunction documentNotReadyOrSSRTesting() {\n  globalElement = null;\n}","\"use strict\";\n\nObject.defineProperty(exports, \"__esModule\", {\n  value: true\n});\nexports.resetState = resetState;\nexports.log = log;\n\nvar _portalOpenInstances = require(\"./portalOpenInstances\");\n\nvar _portalOpenInstances2 = _interopRequireDefault(_portalOpenInstances);\n\nfunction _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }\n\n// Body focus trap see Issue #742\n\nvar before = void 0,\n    after = void 0,\n    instances = [];\n\n/* eslint-disable no-console */\n/* istanbul ignore next */\nfunction resetState() {\n  var _arr = [before, after];\n\n  for (var _i = 0; _i < _arr.length; _i++) {\n    var item = _arr[_i];\n    if (!item) continue;\n    item.parentNode && item.parentNode.removeChild(item);\n  }\n  before = after = null;\n  instances = [];\n}\n\n/* istanbul ignore next */\nfunction log() {\n  console.log(\"bodyTrap ----------\");\n  console.log(instances.length);\n  var _arr2 = [before, after];\n  for (var _i2 = 0; _i2 < _arr2.length; _i2++) {\n    var item = _arr2[_i2];\n    var check = item || {};\n    console.log(check.nodeName, check.className, check.id);\n  }\n  console.log(\"edn bodyTrap ----------\");\n}\n/* eslint-enable no-console */\n\nfunction focusContent() {\n  if (instances.length === 0) {\n    if (process.env.NODE_ENV !== \"production\") {\n      // eslint-disable-next-line no-console\n      console.warn(\"React-Modal: Open instances > 0 expected\");\n    }\n    return;\n  }\n  instances[instances.length - 1].focusContent();\n}\n\nfunction bodyTrap(eventType, openInstances) {\n  if (!before && !after) {\n    before = document.createElement(\"div\");\n    before.setAttribute(\"data-react-modal-body-trap\", \"\");\n    before.style.position = \"absolute\";\n    before.style.opacity = \"0\";\n    before.setAttribute(\"tabindex\", \"0\");\n    before.addEventListener(\"focus\", focusContent);\n    after = before.cloneNode();\n    after.addEventListener(\"focus\", focusContent);\n  }\n\n  instances = openInstances;\n\n  if (instances.length > 0) {\n    // Add focus trap\n    if (document.body.firstChild !== before) {\n      document.body.insertBefore(before, document.body.firstChild);\n    }\n    if (document.body.lastChild !== after) {\n      document.body.appendChild(after);\n    }\n  } else {\n    // Remove focus trap\n    if (before.parentElement) {\n      before.parentElement.removeChild(before);\n    }\n    if (after.parentElement) {\n      after.parentElement.removeChild(after);\n    }\n  }\n}\n\n_portalOpenInstances2.default.subscribe(bodyTrap);","\"use strict\";\n\nObject.defineProperty(exports, \"__esModule\", {\n  value: true\n});\nexports.resetState = resetState;\nexports.log = log;\nvar htmlClassList = {};\nvar docBodyClassList = {};\n\n/* eslint-disable no-console */\n/* istanbul ignore next */\nfunction removeClass(at, cls) {\n  at.classList.remove(cls);\n}\n\n/* istanbul ignore next */\nfunction resetState() {\n  var htmlElement = document.getElementsByTagName(\"html\")[0];\n  for (var cls in htmlClassList) {\n    removeClass(htmlElement, htmlClassList[cls]);\n  }\n\n  var body = document.body;\n  for (var _cls in docBodyClassList) {\n    removeClass(body, docBodyClassList[_cls]);\n  }\n\n  htmlClassList = {};\n  docBodyClassList = {};\n}\n\n/* istanbul ignore next */\nfunction log() {\n  if (process.env.NODE_ENV !== \"production\") {\n    var classes = document.getElementsByTagName(\"html\")[0].className;\n    var buffer = \"Show tracked classes:\\n\\n\";\n\n    buffer += \"<html /> (\" + classes + \"):\\n  \";\n    for (var x in htmlClassList) {\n      buffer += \"  \" + x + \" \" + htmlClassList[x] + \"\\n  \";\n    }\n\n    classes = document.body.className;\n\n    buffer += \"\\n\\ndoc.body (\" + classes + \"):\\n  \";\n    for (var _x in docBodyClassList) {\n      buffer += \"  \" + _x + \" \" + docBodyClassList[_x] + \"\\n  \";\n    }\n\n    buffer += \"\\n\";\n\n    console.log(buffer);\n  }\n}\n/* eslint-enable no-console */\n\n/**\n * Track the number of reference of a class.\n * @param {object} poll The poll to receive the reference.\n * @param {string} className The class name.\n * @return {string}\n */\nvar incrementReference = function incrementReference(poll, className) {\n  if (!poll[className]) {\n    poll[className] = 0;\n  }\n  poll[className] += 1;\n  return className;\n};\n\n/**\n * Drop the reference of a class.\n * @param {object} poll The poll to receive the reference.\n * @param {string} className The class name.\n * @return {string}\n */\nvar decrementReference = function decrementReference(poll, className) {\n  if (poll[className]) {\n    poll[className] -= 1;\n  }\n  return className;\n};\n\n/**\n * Track a class and add to the given class list.\n * @param {Object} classListRef A class list of an element.\n * @param {Object} poll         The poll to be used.\n * @param {Array}  classes      The list of classes to be tracked.\n */\nvar trackClass = function trackClass(classListRef, poll, classes) {\n  classes.forEach(function (className) {\n    incrementReference(poll, className);\n    classListRef.add(className);\n  });\n};\n\n/**\n * Untrack a class and remove from the given class list if the reference\n * reaches 0.\n * @param {Object} classListRef A class list of an element.\n * @param {Object} poll         The poll to be used.\n * @param {Array}  classes      The list of classes to be untracked.\n */\nvar untrackClass = function untrackClass(classListRef, poll, classes) {\n  classes.forEach(function (className) {\n    decrementReference(poll, className);\n    poll[className] === 0 && classListRef.remove(className);\n  });\n};\n\n/**\n * Public inferface to add classes to the document.body.\n * @param {string} bodyClass The class string to be added.\n *                           It may contain more then one class\n *                           with ' ' as separator.\n */\nvar add = exports.add = function add(element, classString) {\n  return trackClass(element.classList, element.nodeName.toLowerCase() == \"html\" ? htmlClassList : docBodyClassList, classString.split(\" \"));\n};\n\n/**\n * Public inferface to remove classes from the document.body.\n * @param {string} bodyClass The class string to be added.\n *                           It may contain more then one class\n *                           with ' ' as separator.\n */\nvar remove = exports.remove = function remove(element, classString) {\n  return untrackClass(element.classList, element.nodeName.toLowerCase() == \"html\" ? htmlClassList : docBodyClassList, classString.split(\" \"));\n};","\"use strict\";\n\nObject.defineProperty(exports, \"__esModule\", {\n  value: true\n});\nexports.resetState = resetState;\nexports.log = log;\nexports.handleBlur = handleBlur;\nexports.handleFocus = handleFocus;\nexports.markForFocusLater = markForFocusLater;\nexports.returnFocus = returnFocus;\nexports.popWithoutFocus = popWithoutFocus;\nexports.setupScopedFocus = setupScopedFocus;\nexports.teardownScopedFocus = teardownScopedFocus;\n\nvar _tabbable = require(\"../helpers/tabbable\");\n\nvar _tabbable2 = _interopRequireDefault(_tabbable);\n\nfunction _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }\n\nvar focusLaterElements = [];\nvar modalElement = null;\nvar needToFocus = false;\n\n/* eslint-disable no-console */\n/* istanbul ignore next */\nfunction resetState() {\n  focusLaterElements = [];\n}\n\n/* istanbul ignore next */\nfunction log() {\n  if (process.env.NODE_ENV !== \"production\") {\n    console.log(\"focusManager ----------\");\n    focusLaterElements.forEach(function (f) {\n      var check = f || {};\n      console.log(check.nodeName, check.className, check.id);\n    });\n    console.log(\"end focusManager ----------\");\n  }\n}\n/* eslint-enable no-console */\n\nfunction handleBlur() {\n  needToFocus = true;\n}\n\nfunction handleFocus() {\n  if (needToFocus) {\n    needToFocus = false;\n    if (!modalElement) {\n      return;\n    }\n    // need to see how jQuery shims document.on('focusin') so we don't need the\n    // setTimeout, firefox doesn't support focusin, if it did, we could focus\n    // the element outside of a setTimeout. Side-effect of this implementation\n    // is that the document.body gets focus, and then we focus our element right\n    // after, seems fine.\n    setTimeout(function () {\n      if (modalElement.contains(document.activeElement)) {\n        return;\n      }\n      var el = (0, _tabbable2.default)(modalElement)[0] || modalElement;\n      el.focus();\n    }, 0);\n  }\n}\n\nfunction markForFocusLater() {\n  focusLaterElements.push(document.activeElement);\n}\n\n/* eslint-disable no-console */\nfunction returnFocus() {\n  var preventScroll = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : false;\n\n  var toFocus = null;\n  try {\n    if (focusLaterElements.length !== 0) {\n      toFocus = focusLaterElements.pop();\n      toFocus.focus({ preventScroll: preventScroll });\n    }\n    return;\n  } catch (e) {\n    console.warn([\"You tried to return focus to\", toFocus, \"but it is not in the DOM anymore\"].join(\" \"));\n  }\n}\n/* eslint-enable no-console */\n\nfunction popWithoutFocus() {\n  focusLaterElements.length > 0 && focusLaterElements.pop();\n}\n\nfunction setupScopedFocus(element) {\n  modalElement = element;\n\n  if (window.addEventListener) {\n    window.addEventListener(\"blur\", handleBlur, false);\n    document.addEventListener(\"focus\", handleFocus, true);\n  } else {\n    window.attachEvent(\"onBlur\", handleBlur);\n    document.attachEvent(\"onFocus\", handleFocus);\n  }\n}\n\nfunction teardownScopedFocus() {\n  modalElement = null;\n\n  if (window.addEventListener) {\n    window.removeEventListener(\"blur\", handleBlur);\n    document.removeEventListener(\"focus\", handleFocus);\n  } else {\n    window.detachEvent(\"onBlur\", handleBlur);\n    document.detachEvent(\"onFocus\", handleFocus);\n  }\n}","\"use strict\";\n\nObject.defineProperty(exports, \"__esModule\", {\n  value: true\n});\nexports.log = log;\nexports.resetState = resetState;\n\nfunction _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError(\"Cannot call a class as a function\"); } }\n\n// Tracks portals that are open and emits events to subscribers\n\nvar PortalOpenInstances = function PortalOpenInstances() {\n  var _this = this;\n\n  _classCallCheck(this, PortalOpenInstances);\n\n  this.register = function (openInstance) {\n    if (_this.openInstances.indexOf(openInstance) !== -1) {\n      if (process.env.NODE_ENV !== \"production\") {\n        // eslint-disable-next-line no-console\n        console.warn(\"React-Modal: Cannot register modal instance that's already open\");\n      }\n      return;\n    }\n    _this.openInstances.push(openInstance);\n    _this.emit(\"register\");\n  };\n\n  this.deregister = function (openInstance) {\n    var index = _this.openInstances.indexOf(openInstance);\n    if (index === -1) {\n      if (process.env.NODE_ENV !== \"production\") {\n        // eslint-disable-next-line no-console\n        console.warn(\"React-Modal: Unable to deregister \" + openInstance + \" as \" + \"it was never registered\");\n      }\n      return;\n    }\n    _this.openInstances.splice(index, 1);\n    _this.emit(\"deregister\");\n  };\n\n  this.subscribe = function (callback) {\n    _this.subscribers.push(callback);\n  };\n\n  this.emit = function (eventType) {\n    _this.subscribers.forEach(function (subscriber) {\n      return subscriber(eventType,\n      // shallow copy to avoid accidental mutation\n      _this.openInstances.slice());\n    });\n  };\n\n  this.openInstances = [];\n  this.subscribers = [];\n};\n\nvar portalOpenInstances = new PortalOpenInstances();\n\n/* eslint-disable no-console */\n/* istanbul ignore next */\nfunction log() {\n  console.log(\"portalOpenInstances ----------\");\n  console.log(portalOpenInstances.openInstances.length);\n  portalOpenInstances.openInstances.forEach(function (p) {\n    return console.log(p);\n  });\n  console.log(\"end portalOpenInstances ----------\");\n}\n\n/* istanbul ignore next */\nfunction resetState() {\n  portalOpenInstances = new PortalOpenInstances();\n}\n/* eslint-enable no-console */\n\nexports.default = portalOpenInstances;","\"use strict\";\n\nObject.defineProperty(exports, \"__esModule\", {\n  value: true\n});\nexports.canUseDOM = exports.SafeNodeList = exports.SafeHTMLCollection = undefined;\n\nvar _exenv = require(\"exenv\");\n\nvar _exenv2 = _interopRequireDefault(_exenv);\n\nfunction _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }\n\nvar EE = _exenv2.default;\n\nvar SafeHTMLElement = EE.canUseDOM ? window.HTMLElement : {};\n\nvar SafeHTMLCollection = exports.SafeHTMLCollection = EE.canUseDOM ? window.HTMLCollection : {};\n\nvar SafeNodeList = exports.SafeNodeList = EE.canUseDOM ? window.NodeList : {};\n\nvar canUseDOM = exports.canUseDOM = EE.canUseDOM;\n\nexports.default = SafeHTMLElement;","\"use strict\";\n\nObject.defineProperty(exports, \"__esModule\", {\n  value: true\n});\nexports.default = scopeTab;\n\nvar _tabbable = require(\"./tabbable\");\n\nvar _tabbable2 = _interopRequireDefault(_tabbable);\n\nfunction _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }\n\nfunction getActiveElement() {\n  var el = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : document;\n\n  return el.activeElement.shadowRoot ? getActiveElement(el.activeElement.shadowRoot) : el.activeElement;\n}\n\nfunction scopeTab(node, event) {\n  var tabbable = (0, _tabbable2.default)(node);\n\n  if (!tabbable.length) {\n    // Do nothing, since there are no elements that can receive focus.\n    event.preventDefault();\n    return;\n  }\n\n  var target = void 0;\n\n  var shiftKey = event.shiftKey;\n  var head = tabbable[0];\n  var tail = tabbable[tabbable.length - 1];\n  var activeElement = getActiveElement();\n\n  // proceed with default browser behavior on tab.\n  // Focus on last element on shift + tab.\n  if (node === activeElement) {\n    if (!shiftKey) return;\n    target = tail;\n  }\n\n  if (tail === activeElement && !shiftKey) {\n    target = head;\n  }\n\n  if (head === activeElement && shiftKey) {\n    target = tail;\n  }\n\n  if (target) {\n    event.preventDefault();\n    target.focus();\n    return;\n  }\n\n  // Safari radio issue.\n  //\n  // Safari does not move the focus to the radio button,\n  // so we need to force it to really walk through all elements.\n  //\n  // This is very error prone, since we are trying to guess\n  // if it is a safari browser from the first occurence between\n  // chrome or safari.\n  //\n  // The chrome user agent contains the first ocurrence\n  // as the 'chrome/version' and later the 'safari/version'.\n  var checkSafari = /(\\bChrome\\b|\\bSafari\\b)\\//.exec(navigator.userAgent);\n  var isSafariDesktop = checkSafari != null && checkSafari[1] != \"Chrome\" && /\\biPod\\b|\\biPad\\b/g.exec(navigator.userAgent) == null;\n\n  // If we are not in safari desktop, let the browser control\n  // the focus\n  if (!isSafariDesktop) return;\n\n  var x = tabbable.indexOf(activeElement);\n\n  if (x > -1) {\n    x += shiftKey ? -1 : 1;\n  }\n\n  target = tabbable[x];\n\n  // If the tabbable element does not exist,\n  // focus head/tail based on shiftKey\n  if (typeof target === \"undefined\") {\n    event.preventDefault();\n    target = shiftKey ? tail : head;\n    target.focus();\n    return;\n  }\n\n  event.preventDefault();\n\n  target.focus();\n}\nmodule.exports = exports[\"default\"];","\"use strict\";\n\nObject.defineProperty(exports, \"__esModule\", {\n  value: true\n});\nexports.default = findTabbableDescendants;\n/*!\n * Adapted from jQuery UI core\n *\n * http://jqueryui.com\n *\n * Copyright 2014 jQuery Foundation and other contributors\n * Released under the MIT license.\n * http://jquery.org/license\n *\n * http://api.jqueryui.com/category/ui-core/\n */\n\nvar DISPLAY_NONE = \"none\";\nvar DISPLAY_CONTENTS = \"contents\";\n\nvar tabbableNode = /input|select|textarea|button|object|iframe/;\n\nfunction isNotOverflowing(element, style) {\n  return style.getPropertyValue(\"overflow\") !== \"visible\" ||\n  // if 'overflow: visible' set, check if there is actually any overflow\n  element.scrollWidth <= 0 && element.scrollHeight <= 0;\n}\n\nfunction hidesContents(element) {\n  var zeroSize = element.offsetWidth <= 0 && element.offsetHeight <= 0;\n\n  // If the node is empty, this is good enough\n  if (zeroSize && !element.innerHTML) return true;\n\n  try {\n    // Otherwise we need to check some styles\n    var style = window.getComputedStyle(element);\n    var displayValue = style.getPropertyValue(\"display\");\n    return zeroSize ? displayValue !== DISPLAY_CONTENTS && isNotOverflowing(element, style) : displayValue === DISPLAY_NONE;\n  } catch (exception) {\n    // eslint-disable-next-line no-console\n    console.warn(\"Failed to inspect element style\");\n    return false;\n  }\n}\n\nfunction visible(element) {\n  var parentElement = element;\n  var rootNode = element.getRootNode && element.getRootNode();\n  while (parentElement) {\n    if (parentElement === document.body) break;\n\n    // if we are not hidden yet, skip to checking outside the Web Component\n    if (rootNode && parentElement === rootNode) parentElement = rootNode.host.parentNode;\n\n    if (hidesContents(parentElement)) return false;\n    parentElement = parentElement.parentNode;\n  }\n  return true;\n}\n\nfunction focusable(element, isTabIndexNotNaN) {\n  var nodeName = element.nodeName.toLowerCase();\n  var res = tabbableNode.test(nodeName) && !element.disabled || (nodeName === \"a\" ? element.href || isTabIndexNotNaN : isTabIndexNotNaN);\n  return res && visible(element);\n}\n\nfunction tabbable(element) {\n  var tabIndex = element.getAttribute(\"tabindex\");\n  if (tabIndex === null) tabIndex = undefined;\n  var isTabIndexNaN = isNaN(tabIndex);\n  return (isTabIndexNaN || tabIndex >= 0) && focusable(element, !isTabIndexNaN);\n}\n\nfunction findTabbableDescendants(element) {\n  var descendants = [].slice.call(element.querySelectorAll(\"*\"), 0).reduce(function (finished, el) {\n    return finished.concat(!el.shadowRoot ? [el] : findTabbableDescendants(el.shadowRoot));\n  }, []);\n  return descendants.filter(tabbable);\n}\nmodule.exports = exports[\"default\"];","\"use strict\";\n\nObject.defineProperty(exports, \"__esModule\", {\n  value: true\n});\n\nvar _Modal = require(\"./components/Modal\");\n\nvar _Modal2 = _interopRequireDefault(_Modal);\n\nfunction _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }\n\nexports.default = _Modal2.default;\nmodule.exports = exports[\"default\"];","/** @license React v17.0.2\n * react.development.js\n *\n * Copyright (c) Facebook, Inc. and its affiliates.\n *\n * This source code is licensed under the MIT license found in the\n * LICENSE file in the root directory of this source tree.\n */\n\n'use strict';\n\nif (process.env.NODE_ENV !== \"production\") {\n  (function() {\n'use strict';\n\nvar _assign = require('object-assign');\n\n// TODO: this is special because it gets imported during build.\nvar ReactVersion = '17.0.2';\n\n// ATTENTION\n// When adding new symbols to this file,\n// Please consider also adding to 'react-devtools-shared/src/backend/ReactSymbols'\n// The Symbol used to tag the ReactElement-like types. If there is no native Symbol\n// nor polyfill, then a plain number is used for performance.\nvar REACT_ELEMENT_TYPE = 0xeac7;\nvar REACT_PORTAL_TYPE = 0xeaca;\nexports.Fragment = 0xeacb;\nexports.StrictMode = 0xeacc;\nexports.Profiler = 0xead2;\nvar REACT_PROVIDER_TYPE = 0xeacd;\nvar REACT_CONTEXT_TYPE = 0xeace;\nvar REACT_FORWARD_REF_TYPE = 0xead0;\nexports.Suspense = 0xead1;\nvar REACT_SUSPENSE_LIST_TYPE = 0xead8;\nvar REACT_MEMO_TYPE = 0xead3;\nvar REACT_LAZY_TYPE = 0xead4;\nvar REACT_BLOCK_TYPE = 0xead9;\nvar REACT_SERVER_BLOCK_TYPE = 0xeada;\nvar REACT_FUNDAMENTAL_TYPE = 0xead5;\nvar REACT_SCOPE_TYPE = 0xead7;\nvar REACT_OPAQUE_ID_TYPE = 0xeae0;\nvar REACT_DEBUG_TRACING_MODE_TYPE = 0xeae1;\nvar REACT_OFFSCREEN_TYPE = 0xeae2;\nvar REACT_LEGACY_HIDDEN_TYPE = 0xeae3;\n\nif (typeof Symbol === 'function' && Symbol.for) {\n  var symbolFor = Symbol.for;\n  REACT_ELEMENT_TYPE = symbolFor('react.element');\n  REACT_PORTAL_TYPE = symbolFor('react.portal');\n  exports.Fragment = symbolFor('react.fragment');\n  exports.StrictMode = symbolFor('react.strict_mode');\n  exports.Profiler = symbolFor('react.profiler');\n  REACT_PROVIDER_TYPE = symbolFor('react.provider');\n  REACT_CONTEXT_TYPE = symbolFor('react.context');\n  REACT_FORWARD_REF_TYPE = symbolFor('react.forward_ref');\n  exports.Suspense = symbolFor('react.suspense');\n  REACT_SUSPENSE_LIST_TYPE = symbolFor('react.suspense_list');\n  REACT_MEMO_TYPE = symbolFor('react.memo');\n  REACT_LAZY_TYPE = symbolFor('react.lazy');\n  REACT_BLOCK_TYPE = symbolFor('react.block');\n  REACT_SERVER_BLOCK_TYPE = symbolFor('react.server.block');\n  REACT_FUNDAMENTAL_TYPE = symbolFor('react.fundamental');\n  REACT_SCOPE_TYPE = symbolFor('react.scope');\n  REACT_OPAQUE_ID_TYPE = symbolFor('react.opaque.id');\n  REACT_DEBUG_TRACING_MODE_TYPE = symbolFor('react.debug_trace_mode');\n  REACT_OFFSCREEN_TYPE = symbolFor('react.offscreen');\n  REACT_LEGACY_HIDDEN_TYPE = symbolFor('react.legacy_hidden');\n}\n\nvar MAYBE_ITERATOR_SYMBOL = typeof Symbol === 'function' && Symbol.iterator;\nvar FAUX_ITERATOR_SYMBOL = '@@iterator';\nfunction getIteratorFn(maybeIterable) {\n  if (maybeIterable === null || typeof maybeIterable !== 'object') {\n    return null;\n  }\n\n  var maybeIterator = MAYBE_ITERATOR_SYMBOL && maybeIterable[MAYBE_ITERATOR_SYMBOL] || maybeIterable[FAUX_ITERATOR_SYMBOL];\n\n  if (typeof maybeIterator === 'function') {\n    return maybeIterator;\n  }\n\n  return null;\n}\n\n/**\n * Keeps track of the current dispatcher.\n */\nvar ReactCurrentDispatcher = {\n  /**\n   * @internal\n   * @type {ReactComponent}\n   */\n  current: null\n};\n\n/**\n * Keeps track of the current batch's configuration such as how long an update\n * should suspend for if it needs to.\n */\nvar ReactCurrentBatchConfig = {\n  transition: 0\n};\n\n/**\n * Keeps track of the current owner.\n *\n * The current owner is the component who should own any components that are\n * currently being constructed.\n */\nvar ReactCurrentOwner = {\n  /**\n   * @internal\n   * @type {ReactComponent}\n   */\n  current: null\n};\n\nvar ReactDebugCurrentFrame = {};\nvar currentExtraStackFrame = null;\nfunction setExtraStackFrame(stack) {\n  {\n    currentExtraStackFrame = stack;\n  }\n}\n\n{\n  ReactDebugCurrentFrame.setExtraStackFrame = function (stack) {\n    {\n      currentExtraStackFrame = stack;\n    }\n  }; // Stack implementation injected by the current renderer.\n\n\n  ReactDebugCurrentFrame.getCurrentStack = null;\n\n  ReactDebugCurrentFrame.getStackAddendum = function () {\n    var stack = ''; // Add an extra top frame while an element is being validated\n\n    if (currentExtraStackFrame) {\n      stack += currentExtraStackFrame;\n    } // Delegate to the injected renderer-specific implementation\n\n\n    var impl = ReactDebugCurrentFrame.getCurrentStack;\n\n    if (impl) {\n      stack += impl() || '';\n    }\n\n    return stack;\n  };\n}\n\n/**\n * Used by act() to track whether you're inside an act() scope.\n */\nvar IsSomeRendererActing = {\n  current: false\n};\n\nvar ReactSharedInternals = {\n  ReactCurrentDispatcher: ReactCurrentDispatcher,\n  ReactCurrentBatchConfig: ReactCurrentBatchConfig,\n  ReactCurrentOwner: ReactCurrentOwner,\n  IsSomeRendererActing: IsSomeRendererActing,\n  // Used by renderers to avoid bundling object-assign twice in UMD bundles:\n  assign: _assign\n};\n\n{\n  ReactSharedInternals.ReactDebugCurrentFrame = ReactDebugCurrentFrame;\n}\n\n// by calls to these methods by a Babel plugin.\n//\n// In PROD (or in packages without access to React internals),\n// they are left as they are instead.\n\nfunction warn(format) {\n  {\n    for (var _len = arguments.length, args = new Array(_len > 1 ? _len - 1 : 0), _key = 1; _key < _len; _key++) {\n      args[_key - 1] = arguments[_key];\n    }\n\n    printWarning('warn', format, args);\n  }\n}\nfunction error(format) {\n  {\n    for (var _len2 = arguments.length, args = new Array(_len2 > 1 ? _len2 - 1 : 0), _key2 = 1; _key2 < _len2; _key2++) {\n      args[_key2 - 1] = arguments[_key2];\n    }\n\n    printWarning('error', format, args);\n  }\n}\n\nfunction printWarning(level, format, args) {\n  // When changing this logic, you might want to also\n  // update consoleWithStackDev.www.js as well.\n  {\n    var ReactDebugCurrentFrame = ReactSharedInternals.ReactDebugCurrentFrame;\n    var stack = ReactDebugCurrentFrame.getStackAddendum();\n\n    if (stack !== '') {\n      format += '%s';\n      args = args.concat([stack]);\n    }\n\n    var argsWithFormat = args.map(function (item) {\n      return '' + item;\n    }); // Careful: RN currently depends on this prefix\n\n    argsWithFormat.unshift('Warning: ' + format); // We intentionally don't use spread (or .apply) directly because it\n    // breaks IE9: https://github.com/facebook/react/issues/13610\n    // eslint-disable-next-line react-internal/no-production-logging\n\n    Function.prototype.apply.call(console[level], console, argsWithFormat);\n  }\n}\n\nvar didWarnStateUpdateForUnmountedComponent = {};\n\nfunction warnNoop(publicInstance, callerName) {\n  {\n    var _constructor = publicInstance.constructor;\n    var componentName = _constructor && (_constructor.displayName || _constructor.name) || 'ReactClass';\n    var warningKey = componentName + \".\" + callerName;\n\n    if (didWarnStateUpdateForUnmountedComponent[warningKey]) {\n      return;\n    }\n\n    error(\"Can't call %s on a component that is not yet mounted. \" + 'This is a no-op, but it might indicate a bug in your application. ' + 'Instead, assign to `this.state` directly or define a `state = {};` ' + 'class property with the desired state in the %s component.', callerName, componentName);\n\n    didWarnStateUpdateForUnmountedComponent[warningKey] = true;\n  }\n}\n/**\n * This is the abstract API for an update queue.\n */\n\n\nvar ReactNoopUpdateQueue = {\n  /**\n   * Checks whether or not this composite component is mounted.\n   * @param {ReactClass} publicInstance The instance we want to test.\n   * @return {boolean} True if mounted, false otherwise.\n   * @protected\n   * @final\n   */\n  isMounted: function (publicInstance) {\n    return false;\n  },\n\n  /**\n   * Forces an update. This should only be invoked when it is known with\n   * certainty that we are **not** in a DOM transaction.\n   *\n   * You may want to call this when you know that some deeper aspect of the\n   * component's state has changed but `setState` was not called.\n   *\n   * This will not invoke `shouldComponentUpdate`, but it will invoke\n   * `componentWillUpdate` and `componentDidUpdate`.\n   *\n   * @param {ReactClass} publicInstance The instance that should rerender.\n   * @param {?function} callback Called after component is updated.\n   * @param {?string} callerName name of the calling function in the public API.\n   * @internal\n   */\n  enqueueForceUpdate: function (publicInstance, callback, callerName) {\n    warnNoop(publicInstance, 'forceUpdate');\n  },\n\n  /**\n   * Replaces all of the state. Always use this or `setState` to mutate state.\n   * You should treat `this.state` as immutable.\n   *\n   * There is no guarantee that `this.state` will be immediately updated, so\n   * accessing `this.state` after calling this method may return the old value.\n   *\n   * @param {ReactClass} publicInstance The instance that should rerender.\n   * @param {object} completeState Next state.\n   * @param {?function} callback Called after component is updated.\n   * @param {?string} callerName name of the calling function in the public API.\n   * @internal\n   */\n  enqueueReplaceState: function (publicInstance, completeState, callback, callerName) {\n    warnNoop(publicInstance, 'replaceState');\n  },\n\n  /**\n   * Sets a subset of the state. This only exists because _pendingState is\n   * internal. This provides a merging strategy that is not available to deep\n   * properties which is confusing. TODO: Expose pendingState or don't use it\n   * during the merge.\n   *\n   * @param {ReactClass} publicInstance The instance that should rerender.\n   * @param {object} partialState Next partial state to be merged with state.\n   * @param {?function} callback Called after component is updated.\n   * @param {?string} Name of the calling function in the public API.\n   * @internal\n   */\n  enqueueSetState: function (publicInstance, partialState, callback, callerName) {\n    warnNoop(publicInstance, 'setState');\n  }\n};\n\nvar emptyObject = {};\n\n{\n  Object.freeze(emptyObject);\n}\n/**\n * Base class helpers for the updating state of a component.\n */\n\n\nfunction Component(props, context, updater) {\n  this.props = props;\n  this.context = context; // If a component has string refs, we will assign a different object later.\n\n  this.refs = emptyObject; // We initialize the default updater but the real one gets injected by the\n  // renderer.\n\n  this.updater = updater || ReactNoopUpdateQueue;\n}\n\nComponent.prototype.isReactComponent = {};\n/**\n * Sets a subset of the state. Always use this to mutate\n * state. You should treat `this.state` as immutable.\n *\n * There is no guarantee that `this.state` will be immediately updated, so\n * accessing `this.state` after calling this method may return the old value.\n *\n * There is no guarantee that calls to `setState` will run synchronously,\n * as they may eventually be batched together.  You can provide an optional\n * callback that will be executed when the call to setState is actually\n * completed.\n *\n * When a function is provided to setState, it will be called at some point in\n * the future (not synchronously). It will be called with the up to date\n * component arguments (state, props, context). These values can be different\n * from this.* because your function may be called after receiveProps but before\n * shouldComponentUpdate, and this new state, props, and context will not yet be\n * assigned to this.\n *\n * @param {object|function} partialState Next partial state or function to\n *        produce next partial state to be merged with current state.\n * @param {?function} callback Called after state is updated.\n * @final\n * @protected\n */\n\nComponent.prototype.setState = function (partialState, callback) {\n  if (!(typeof partialState === 'object' || typeof partialState === 'function' || partialState == null)) {\n    {\n      throw Error( \"setState(...): takes an object of state variables to update or a function which returns an object of state variables.\" );\n    }\n  }\n\n  this.updater.enqueueSetState(this, partialState, callback, 'setState');\n};\n/**\n * Forces an update. This should only be invoked when it is known with\n * certainty that we are **not** in a DOM transaction.\n *\n * You may want to call this when you know that some deeper aspect of the\n * component's state has changed but `setState` was not called.\n *\n * This will not invoke `shouldComponentUpdate`, but it will invoke\n * `componentWillUpdate` and `componentDidUpdate`.\n *\n * @param {?function} callback Called after update is complete.\n * @final\n * @protected\n */\n\n\nComponent.prototype.forceUpdate = function (callback) {\n  this.updater.enqueueForceUpdate(this, callback, 'forceUpdate');\n};\n/**\n * Deprecated APIs. These APIs used to exist on classic React classes but since\n * we would like to deprecate them, we're not going to move them over to this\n * modern base class. Instead, we define a getter that warns if it's accessed.\n */\n\n\n{\n  var deprecatedAPIs = {\n    isMounted: ['isMounted', 'Instead, make sure to clean up subscriptions and pending requests in ' + 'componentWillUnmount to prevent memory leaks.'],\n    replaceState: ['replaceState', 'Refactor your code to use setState instead (see ' + 'https://github.com/facebook/react/issues/3236).']\n  };\n\n  var defineDeprecationWarning = function (methodName, info) {\n    Object.defineProperty(Component.prototype, methodName, {\n      get: function () {\n        warn('%s(...) is deprecated in plain JavaScript React classes. %s', info[0], info[1]);\n\n        return undefined;\n      }\n    });\n  };\n\n  for (var fnName in deprecatedAPIs) {\n    if (deprecatedAPIs.hasOwnProperty(fnName)) {\n      defineDeprecationWarning(fnName, deprecatedAPIs[fnName]);\n    }\n  }\n}\n\nfunction ComponentDummy() {}\n\nComponentDummy.prototype = Component.prototype;\n/**\n * Convenience component with default shallow equality check for sCU.\n */\n\nfunction PureComponent(props, context, updater) {\n  this.props = props;\n  this.context = context; // If a component has string refs, we will assign a different object later.\n\n  this.refs = emptyObject;\n  this.updater = updater || ReactNoopUpdateQueue;\n}\n\nvar pureComponentPrototype = PureComponent.prototype = new ComponentDummy();\npureComponentPrototype.constructor = PureComponent; // Avoid an extra prototype jump for these methods.\n\n_assign(pureComponentPrototype, Component.prototype);\n\npureComponentPrototype.isPureReactComponent = true;\n\n// an immutable object with a single mutable value\nfunction createRef() {\n  var refObject = {\n    current: null\n  };\n\n  {\n    Object.seal(refObject);\n  }\n\n  return refObject;\n}\n\nfunction getWrappedName(outerType, innerType, wrapperName) {\n  var functionName = innerType.displayName || innerType.name || '';\n  return outerType.displayName || (functionName !== '' ? wrapperName + \"(\" + functionName + \")\" : wrapperName);\n}\n\nfunction getContextName(type) {\n  return type.displayName || 'Context';\n}\n\nfunction getComponentName(type) {\n  if (type == null) {\n    // Host root, text node or just invalid type.\n    return null;\n  }\n\n  {\n    if (typeof type.tag === 'number') {\n      error('Received an unexpected object in getComponentName(). ' + 'This is likely a bug in React. Please file an issue.');\n    }\n  }\n\n  if (typeof type === 'function') {\n    return type.displayName || type.name || null;\n  }\n\n  if (typeof type === 'string') {\n    return type;\n  }\n\n  switch (type) {\n    case exports.Fragment:\n      return 'Fragment';\n\n    case REACT_PORTAL_TYPE:\n      return 'Portal';\n\n    case exports.Profiler:\n      return 'Profiler';\n\n    case exports.StrictMode:\n      return 'StrictMode';\n\n    case exports.Suspense:\n      return 'Suspense';\n\n    case REACT_SUSPENSE_LIST_TYPE:\n      return 'SuspenseList';\n  }\n\n  if (typeof type === 'object') {\n    switch (type.$$typeof) {\n      case REACT_CONTEXT_TYPE:\n        var context = type;\n        return getContextName(context) + '.Consumer';\n\n      case REACT_PROVIDER_TYPE:\n        var provider = type;\n        return getContextName(provider._context) + '.Provider';\n\n      case REACT_FORWARD_REF_TYPE:\n        return getWrappedName(type, type.render, 'ForwardRef');\n\n      case REACT_MEMO_TYPE:\n        return getComponentName(type.type);\n\n      case REACT_BLOCK_TYPE:\n        return getComponentName(type._render);\n\n      case REACT_LAZY_TYPE:\n        {\n          var lazyComponent = type;\n          var payload = lazyComponent._payload;\n          var init = lazyComponent._init;\n\n          try {\n            return getComponentName(init(payload));\n          } catch (x) {\n            return null;\n          }\n        }\n    }\n  }\n\n  return null;\n}\n\nvar hasOwnProperty = Object.prototype.hasOwnProperty;\nvar RESERVED_PROPS = {\n  key: true,\n  ref: true,\n  __self: true,\n  __source: true\n};\nvar specialPropKeyWarningShown, specialPropRefWarningShown, didWarnAboutStringRefs;\n\n{\n  didWarnAboutStringRefs = {};\n}\n\nfunction hasValidRef(config) {\n  {\n    if (hasOwnProperty.call(config, 'ref')) {\n      var getter = Object.getOwnPropertyDescriptor(config, 'ref').get;\n\n      if (getter && getter.isReactWarning) {\n        return false;\n      }\n    }\n  }\n\n  return config.ref !== undefined;\n}\n\nfunction hasValidKey(config) {\n  {\n    if (hasOwnProperty.call(config, 'key')) {\n      var getter = Object.getOwnPropertyDescriptor(config, 'key').get;\n\n      if (getter && getter.isReactWarning) {\n        return false;\n      }\n    }\n  }\n\n  return config.key !== undefined;\n}\n\nfunction defineKeyPropWarningGetter(props, displayName) {\n  var warnAboutAccessingKey = function () {\n    {\n      if (!specialPropKeyWarningShown) {\n        specialPropKeyWarningShown = true;\n\n        error('%s: `key` is not a prop. Trying to access it will result ' + 'in `undefined` being returned. If you need to access the same ' + 'value within the child component, you should pass it as a different ' + 'prop. (https://reactjs.org/link/special-props)', displayName);\n      }\n    }\n  };\n\n  warnAboutAccessingKey.isReactWarning = true;\n  Object.defineProperty(props, 'key', {\n    get: warnAboutAccessingKey,\n    configurable: true\n  });\n}\n\nfunction defineRefPropWarningGetter(props, displayName) {\n  var warnAboutAccessingRef = function () {\n    {\n      if (!specialPropRefWarningShown) {\n        specialPropRefWarningShown = true;\n\n        error('%s: `ref` is not a prop. Trying to access it will result ' + 'in `undefined` being returned. If you need to access the same ' + 'value within the child component, you should pass it as a different ' + 'prop. (https://reactjs.org/link/special-props)', displayName);\n      }\n    }\n  };\n\n  warnAboutAccessingRef.isReactWarning = true;\n  Object.defineProperty(props, 'ref', {\n    get: warnAboutAccessingRef,\n    configurable: true\n  });\n}\n\nfunction warnIfStringRefCannotBeAutoConverted(config) {\n  {\n    if (typeof config.ref === 'string' && ReactCurrentOwner.current && config.__self && ReactCurrentOwner.current.stateNode !== config.__self) {\n      var componentName = getComponentName(ReactCurrentOwner.current.type);\n\n      if (!didWarnAboutStringRefs[componentName]) {\n        error('Component \"%s\" contains the string ref \"%s\". ' + 'Support for string refs will be removed in a future major release. ' + 'This case cannot be automatically converted to an arrow function. ' + 'We ask you to manually fix this case by using useRef() or createRef() instead. ' + 'Learn more about using refs safely here: ' + 'https://reactjs.org/link/strict-mode-string-ref', componentName, config.ref);\n\n        didWarnAboutStringRefs[componentName] = true;\n      }\n    }\n  }\n}\n/**\n * Factory method to create a new React element. This no longer adheres to\n * the class pattern, so do not use new to call it. Also, instanceof check\n * will not work. Instead test $$typeof field against Symbol.for('react.element') to check\n * if something is a React Element.\n *\n * @param {*} type\n * @param {*} props\n * @param {*} key\n * @param {string|object} ref\n * @param {*} owner\n * @param {*} self A *temporary* helper to detect places where `this` is\n * different from the `owner` when React.createElement is called, so that we\n * can warn. We want to get rid of owner and replace string `ref`s with arrow\n * functions, and as long as `this` and owner are the same, there will be no\n * change in behavior.\n * @param {*} source An annotation object (added by a transpiler or otherwise)\n * indicating filename, line number, and/or other information.\n * @internal\n */\n\n\nvar ReactElement = function (type, key, ref, self, source, owner, props) {\n  var element = {\n    // This tag allows us to uniquely identify this as a React Element\n    $$typeof: REACT_ELEMENT_TYPE,\n    // Built-in properties that belong on the element\n    type: type,\n    key: key,\n    ref: ref,\n    props: props,\n    // Record the component responsible for creating this element.\n    _owner: owner\n  };\n\n  {\n    // The validation flag is currently mutative. We put it on\n    // an external backing store so that we can freeze the whole object.\n    // This can be replaced with a WeakMap once they are implemented in\n    // commonly used development environments.\n    element._store = {}; // To make comparing ReactElements easier for testing purposes, we make\n    // the validation flag non-enumerable (where possible, which should\n    // include every environment we run tests in), so the test framework\n    // ignores it.\n\n    Object.defineProperty(element._store, 'validated', {\n      configurable: false,\n      enumerable: false,\n      writable: true,\n      value: false\n    }); // self and source are DEV only properties.\n\n    Object.defineProperty(element, '_self', {\n      configurable: false,\n      enumerable: false,\n      writable: false,\n      value: self\n    }); // Two elements created in two different places should be considered\n    // equal for testing purposes and therefore we hide it from enumeration.\n\n    Object.defineProperty(element, '_source', {\n      configurable: false,\n      enumerable: false,\n      writable: false,\n      value: source\n    });\n\n    if (Object.freeze) {\n      Object.freeze(element.props);\n      Object.freeze(element);\n    }\n  }\n\n  return element;\n};\n/**\n * Create and return a new ReactElement of the given type.\n * See https://reactjs.org/docs/react-api.html#createelement\n */\n\nfunction createElement(type, config, children) {\n  var propName; // Reserved names are extracted\n\n  var props = {};\n  var key = null;\n  var ref = null;\n  var self = null;\n  var source = null;\n\n  if (config != null) {\n    if (hasValidRef(config)) {\n      ref = config.ref;\n\n      {\n        warnIfStringRefCannotBeAutoConverted(config);\n      }\n    }\n\n    if (hasValidKey(config)) {\n      key = '' + config.key;\n    }\n\n    self = config.__self === undefined ? null : config.__self;\n    source = config.__source === undefined ? null : config.__source; // Remaining properties are added to a new props object\n\n    for (propName in config) {\n      if (hasOwnProperty.call(config, propName) && !RESERVED_PROPS.hasOwnProperty(propName)) {\n        props[propName] = config[propName];\n      }\n    }\n  } // Children can be more than one argument, and those are transferred onto\n  // the newly allocated props object.\n\n\n  var childrenLength = arguments.length - 2;\n\n  if (childrenLength === 1) {\n    props.children = children;\n  } else if (childrenLength > 1) {\n    var childArray = Array(childrenLength);\n\n    for (var i = 0; i < childrenLength; i++) {\n      childArray[i] = arguments[i + 2];\n    }\n\n    {\n      if (Object.freeze) {\n        Object.freeze(childArray);\n      }\n    }\n\n    props.children = childArray;\n  } // Resolve default props\n\n\n  if (type && type.defaultProps) {\n    var defaultProps = type.defaultProps;\n\n    for (propName in defaultProps) {\n      if (props[propName] === undefined) {\n        props[propName] = defaultProps[propName];\n      }\n    }\n  }\n\n  {\n    if (key || ref) {\n      var displayName = typeof type === 'function' ? type.displayName || type.name || 'Unknown' : type;\n\n      if (key) {\n        defineKeyPropWarningGetter(props, displayName);\n      }\n\n      if (ref) {\n        defineRefPropWarningGetter(props, displayName);\n      }\n    }\n  }\n\n  return ReactElement(type, key, ref, self, source, ReactCurrentOwner.current, props);\n}\nfunction cloneAndReplaceKey(oldElement, newKey) {\n  var newElement = ReactElement(oldElement.type, newKey, oldElement.ref, oldElement._self, oldElement._source, oldElement._owner, oldElement.props);\n  return newElement;\n}\n/**\n * Clone and return a new ReactElement using element as the starting point.\n * See https://reactjs.org/docs/react-api.html#cloneelement\n */\n\nfunction cloneElement(element, config, children) {\n  if (!!(element === null || element === undefined)) {\n    {\n      throw Error( \"React.cloneElement(...): The argument must be a React element, but you passed \" + element + \".\" );\n    }\n  }\n\n  var propName; // Original props are copied\n\n  var props = _assign({}, element.props); // Reserved names are extracted\n\n\n  var key = element.key;\n  var ref = element.ref; // Self is preserved since the owner is preserved.\n\n  var self = element._self; // Source is preserved since cloneElement is unlikely to be targeted by a\n  // transpiler, and the original source is probably a better indicator of the\n  // true owner.\n\n  var source = element._source; // Owner will be preserved, unless ref is overridden\n\n  var owner = element._owner;\n\n  if (config != null) {\n    if (hasValidRef(config)) {\n      // Silently steal the ref from the parent.\n      ref = config.ref;\n      owner = ReactCurrentOwner.current;\n    }\n\n    if (hasValidKey(config)) {\n      key = '' + config.key;\n    } // Remaining properties override existing props\n\n\n    var defaultProps;\n\n    if (element.type && element.type.defaultProps) {\n      defaultProps = element.type.defaultProps;\n    }\n\n    for (propName in config) {\n      if (hasOwnProperty.call(config, propName) && !RESERVED_PROPS.hasOwnProperty(propName)) {\n        if (config[propName] === undefined && defaultProps !== undefined) {\n          // Resolve default props\n          props[propName] = defaultProps[propName];\n        } else {\n          props[propName] = config[propName];\n        }\n      }\n    }\n  } // Children can be more than one argument, and those are transferred onto\n  // the newly allocated props object.\n\n\n  var childrenLength = arguments.length - 2;\n\n  if (childrenLength === 1) {\n    props.children = children;\n  } else if (childrenLength > 1) {\n    var childArray = Array(childrenLength);\n\n    for (var i = 0; i < childrenLength; i++) {\n      childArray[i] = arguments[i + 2];\n    }\n\n    props.children = childArray;\n  }\n\n  return ReactElement(element.type, key, ref, self, source, owner, props);\n}\n/**\n * Verifies the object is a ReactElement.\n * See https://reactjs.org/docs/react-api.html#isvalidelement\n * @param {?object} object\n * @return {boolean} True if `object` is a ReactElement.\n * @final\n */\n\nfunction isValidElement(object) {\n  return typeof object === 'object' && object !== null && object.$$typeof === REACT_ELEMENT_TYPE;\n}\n\nvar SEPARATOR = '.';\nvar SUBSEPARATOR = ':';\n/**\n * Escape and wrap key so it is safe to use as a reactid\n *\n * @param {string} key to be escaped.\n * @return {string} the escaped key.\n */\n\nfunction escape(key) {\n  var escapeRegex = /[=:]/g;\n  var escaperLookup = {\n    '=': '=0',\n    ':': '=2'\n  };\n  var escapedString = key.replace(escapeRegex, function (match) {\n    return escaperLookup[match];\n  });\n  return '$' + escapedString;\n}\n/**\n * TODO: Test that a single child and an array with one item have the same key\n * pattern.\n */\n\n\nvar didWarnAboutMaps = false;\nvar userProvidedKeyEscapeRegex = /\\/+/g;\n\nfunction escapeUserProvidedKey(text) {\n  return text.replace(userProvidedKeyEscapeRegex, '$&/');\n}\n/**\n * Generate a key string that identifies a element within a set.\n *\n * @param {*} element A element that could contain a manual key.\n * @param {number} index Index that is used if a manual key is not provided.\n * @return {string}\n */\n\n\nfunction getElementKey(element, index) {\n  // Do some typechecking here since we call this blindly. We want to ensure\n  // that we don't block potential future ES APIs.\n  if (typeof element === 'object' && element !== null && element.key != null) {\n    // Explicit key\n    return escape('' + element.key);\n  } // Implicit key determined by the index in the set\n\n\n  return index.toString(36);\n}\n\nfunction mapIntoArray(children, array, escapedPrefix, nameSoFar, callback) {\n  var type = typeof children;\n\n  if (type === 'undefined' || type === 'boolean') {\n    // All of the above are perceived as null.\n    children = null;\n  }\n\n  var invokeCallback = false;\n\n  if (children === null) {\n    invokeCallback = true;\n  } else {\n    switch (type) {\n      case 'string':\n      case 'number':\n        invokeCallback = true;\n        break;\n\n      case 'object':\n        switch (children.$$typeof) {\n          case REACT_ELEMENT_TYPE:\n          case REACT_PORTAL_TYPE:\n            invokeCallback = true;\n        }\n\n    }\n  }\n\n  if (invokeCallback) {\n    var _child = children;\n    var mappedChild = callback(_child); // If it's the only child, treat the name as if it was wrapped in an array\n    // so that it's consistent if the number of children grows:\n\n    var childKey = nameSoFar === '' ? SEPARATOR + getElementKey(_child, 0) : nameSoFar;\n\n    if (Array.isArray(mappedChild)) {\n      var escapedChildKey = '';\n\n      if (childKey != null) {\n        escapedChildKey = escapeUserProvidedKey(childKey) + '/';\n      }\n\n      mapIntoArray(mappedChild, array, escapedChildKey, '', function (c) {\n        return c;\n      });\n    } else if (mappedChild != null) {\n      if (isValidElement(mappedChild)) {\n        mappedChild = cloneAndReplaceKey(mappedChild, // Keep both the (mapped) and old keys if they differ, just as\n        // traverseAllChildren used to do for objects as children\n        escapedPrefix + ( // $FlowFixMe Flow incorrectly thinks React.Portal doesn't have a key\n        mappedChild.key && (!_child || _child.key !== mappedChild.key) ? // $FlowFixMe Flow incorrectly thinks existing element's key can be a number\n        escapeUserProvidedKey('' + mappedChild.key) + '/' : '') + childKey);\n      }\n\n      array.push(mappedChild);\n    }\n\n    return 1;\n  }\n\n  var child;\n  var nextName;\n  var subtreeCount = 0; // Count of children found in the current subtree.\n\n  var nextNamePrefix = nameSoFar === '' ? SEPARATOR : nameSoFar + SUBSEPARATOR;\n\n  if (Array.isArray(children)) {\n    for (var i = 0; i < children.length; i++) {\n      child = children[i];\n      nextName = nextNamePrefix + getElementKey(child, i);\n      subtreeCount += mapIntoArray(child, array, escapedPrefix, nextName, callback);\n    }\n  } else {\n    var iteratorFn = getIteratorFn(children);\n\n    if (typeof iteratorFn === 'function') {\n      var iterableChildren = children;\n\n      {\n        // Warn about using Maps as children\n        if (iteratorFn === iterableChildren.entries) {\n          if (!didWarnAboutMaps) {\n            warn('Using Maps as children is not supported. ' + 'Use an array of keyed ReactElements instead.');\n          }\n\n          didWarnAboutMaps = true;\n        }\n      }\n\n      var iterator = iteratorFn.call(iterableChildren);\n      var step;\n      var ii = 0;\n\n      while (!(step = iterator.next()).done) {\n        child = step.value;\n        nextName = nextNamePrefix + getElementKey(child, ii++);\n        subtreeCount += mapIntoArray(child, array, escapedPrefix, nextName, callback);\n      }\n    } else if (type === 'object') {\n      var childrenString = '' + children;\n\n      {\n        {\n          throw Error( \"Objects are not valid as a React child (found: \" + (childrenString === '[object Object]' ? 'object with keys {' + Object.keys(children).join(', ') + '}' : childrenString) + \"). If you meant to render a collection of children, use an array instead.\" );\n        }\n      }\n    }\n  }\n\n  return subtreeCount;\n}\n\n/**\n * Maps children that are typically specified as `props.children`.\n *\n * See https://reactjs.org/docs/react-api.html#reactchildrenmap\n *\n * The provided mapFunction(child, index) will be called for each\n * leaf child.\n *\n * @param {?*} children Children tree container.\n * @param {function(*, int)} func The map function.\n * @param {*} context Context for mapFunction.\n * @return {object} Object containing the ordered map of results.\n */\nfunction mapChildren(children, func, context) {\n  if (children == null) {\n    return children;\n  }\n\n  var result = [];\n  var count = 0;\n  mapIntoArray(children, result, '', '', function (child) {\n    return func.call(context, child, count++);\n  });\n  return result;\n}\n/**\n * Count the number of children that are typically specified as\n * `props.children`.\n *\n * See https://reactjs.org/docs/react-api.html#reactchildrencount\n *\n * @param {?*} children Children tree container.\n * @return {number} The number of children.\n */\n\n\nfunction countChildren(children) {\n  var n = 0;\n  mapChildren(children, function () {\n    n++; // Don't return anything\n  });\n  return n;\n}\n\n/**\n * Iterates through children that are typically specified as `props.children`.\n *\n * See https://reactjs.org/docs/react-api.html#reactchildrenforeach\n *\n * The provided forEachFunc(child, index) will be called for each\n * leaf child.\n *\n * @param {?*} children Children tree container.\n * @param {function(*, int)} forEachFunc\n * @param {*} forEachContext Context for forEachContext.\n */\nfunction forEachChildren(children, forEachFunc, forEachContext) {\n  mapChildren(children, function () {\n    forEachFunc.apply(this, arguments); // Don't return anything.\n  }, forEachContext);\n}\n/**\n * Flatten a children object (typically specified as `props.children`) and\n * return an array with appropriately re-keyed children.\n *\n * See https://reactjs.org/docs/react-api.html#reactchildrentoarray\n */\n\n\nfunction toArray(children) {\n  return mapChildren(children, function (child) {\n    return child;\n  }) || [];\n}\n/**\n * Returns the first child in a collection of children and verifies that there\n * is only one child in the collection.\n *\n * See https://reactjs.org/docs/react-api.html#reactchildrenonly\n *\n * The current implementation of this function assumes that a single child gets\n * passed without a wrapper, but the purpose of this helper function is to\n * abstract away the particular structure of children.\n *\n * @param {?object} children Child collection structure.\n * @return {ReactElement} The first and only `ReactElement` contained in the\n * structure.\n */\n\n\nfunction onlyChild(children) {\n  if (!isValidElement(children)) {\n    {\n      throw Error( \"React.Children.only expected to receive a single React element child.\" );\n    }\n  }\n\n  return children;\n}\n\nfunction createContext(defaultValue, calculateChangedBits) {\n  if (calculateChangedBits === undefined) {\n    calculateChangedBits = null;\n  } else {\n    {\n      if (calculateChangedBits !== null && typeof calculateChangedBits !== 'function') {\n        error('createContext: Expected the optional second argument to be a ' + 'function. Instead received: %s', calculateChangedBits);\n      }\n    }\n  }\n\n  var context = {\n    $$typeof: REACT_CONTEXT_TYPE,\n    _calculateChangedBits: calculateChangedBits,\n    // As a workaround to support multiple concurrent renderers, we categorize\n    // some renderers as primary and others as secondary. We only expect\n    // there to be two concurrent renderers at most: React Native (primary) and\n    // Fabric (secondary); React DOM (primary) and React ART (secondary).\n    // Secondary renderers store their context values on separate fields.\n    _currentValue: defaultValue,\n    _currentValue2: defaultValue,\n    // Used to track how many concurrent renderers this context currently\n    // supports within in a single renderer. Such as parallel server rendering.\n    _threadCount: 0,\n    // These are circular\n    Provider: null,\n    Consumer: null\n  };\n  context.Provider = {\n    $$typeof: REACT_PROVIDER_TYPE,\n    _context: context\n  };\n  var hasWarnedAboutUsingNestedContextConsumers = false;\n  var hasWarnedAboutUsingConsumerProvider = false;\n  var hasWarnedAboutDisplayNameOnConsumer = false;\n\n  {\n    // A separate object, but proxies back to the original context object for\n    // backwards compatibility. It has a different $$typeof, so we can properly\n    // warn for the incorrect usage of Context as a Consumer.\n    var Consumer = {\n      $$typeof: REACT_CONTEXT_TYPE,\n      _context: context,\n      _calculateChangedBits: context._calculateChangedBits\n    }; // $FlowFixMe: Flow complains about not setting a value, which is intentional here\n\n    Object.defineProperties(Consumer, {\n      Provider: {\n        get: function () {\n          if (!hasWarnedAboutUsingConsumerProvider) {\n            hasWarnedAboutUsingConsumerProvider = true;\n\n            error('Rendering <Context.Consumer.Provider> is not supported and will be removed in ' + 'a future major release. Did you mean to render <Context.Provider> instead?');\n          }\n\n          return context.Provider;\n        },\n        set: function (_Provider) {\n          context.Provider = _Provider;\n        }\n      },\n      _currentValue: {\n        get: function () {\n          return context._currentValue;\n        },\n        set: function (_currentValue) {\n          context._currentValue = _currentValue;\n        }\n      },\n      _currentValue2: {\n        get: function () {\n          return context._currentValue2;\n        },\n        set: function (_currentValue2) {\n          context._currentValue2 = _currentValue2;\n        }\n      },\n      _threadCount: {\n        get: function () {\n          return context._threadCount;\n        },\n        set: function (_threadCount) {\n          context._threadCount = _threadCount;\n        }\n      },\n      Consumer: {\n        get: function () {\n          if (!hasWarnedAboutUsingNestedContextConsumers) {\n            hasWarnedAboutUsingNestedContextConsumers = true;\n\n            error('Rendering <Context.Consumer.Consumer> is not supported and will be removed in ' + 'a future major release. Did you mean to render <Context.Consumer> instead?');\n          }\n\n          return context.Consumer;\n        }\n      },\n      displayName: {\n        get: function () {\n          return context.displayName;\n        },\n        set: function (displayName) {\n          if (!hasWarnedAboutDisplayNameOnConsumer) {\n            warn('Setting `displayName` on Context.Consumer has no effect. ' + \"You should set it directly on the context with Context.displayName = '%s'.\", displayName);\n\n            hasWarnedAboutDisplayNameOnConsumer = true;\n          }\n        }\n      }\n    }); // $FlowFixMe: Flow complains about missing properties because it doesn't understand defineProperty\n\n    context.Consumer = Consumer;\n  }\n\n  {\n    context._currentRenderer = null;\n    context._currentRenderer2 = null;\n  }\n\n  return context;\n}\n\nvar Uninitialized = -1;\nvar Pending = 0;\nvar Resolved = 1;\nvar Rejected = 2;\n\nfunction lazyInitializer(payload) {\n  if (payload._status === Uninitialized) {\n    var ctor = payload._result;\n    var thenable = ctor(); // Transition to the next state.\n\n    var pending = payload;\n    pending._status = Pending;\n    pending._result = thenable;\n    thenable.then(function (moduleObject) {\n      if (payload._status === Pending) {\n        var defaultExport = moduleObject.default;\n\n        {\n          if (defaultExport === undefined) {\n            error('lazy: Expected the result of a dynamic import() call. ' + 'Instead received: %s\\n\\nYour code should look like: \\n  ' + // Break up imports to avoid accidentally parsing them as dependencies.\n            'const MyComponent = lazy(() => imp' + \"ort('./MyComponent'))\", moduleObject);\n          }\n        } // Transition to the next state.\n\n\n        var resolved = payload;\n        resolved._status = Resolved;\n        resolved._result = defaultExport;\n      }\n    }, function (error) {\n      if (payload._status === Pending) {\n        // Transition to the next state.\n        var rejected = payload;\n        rejected._status = Rejected;\n        rejected._result = error;\n      }\n    });\n  }\n\n  if (payload._status === Resolved) {\n    return payload._result;\n  } else {\n    throw payload._result;\n  }\n}\n\nfunction lazy(ctor) {\n  var payload = {\n    // We use these fields to store the result.\n    _status: -1,\n    _result: ctor\n  };\n  var lazyType = {\n    $$typeof: REACT_LAZY_TYPE,\n    _payload: payload,\n    _init: lazyInitializer\n  };\n\n  {\n    // In production, this would just set it on the object.\n    var defaultProps;\n    var propTypes; // $FlowFixMe\n\n    Object.defineProperties(lazyType, {\n      defaultProps: {\n        configurable: true,\n        get: function () {\n          return defaultProps;\n        },\n        set: function (newDefaultProps) {\n          error('React.lazy(...): It is not supported to assign `defaultProps` to ' + 'a lazy component import. Either specify them where the component ' + 'is defined, or create a wrapping component around it.');\n\n          defaultProps = newDefaultProps; // Match production behavior more closely:\n          // $FlowFixMe\n\n          Object.defineProperty(lazyType, 'defaultProps', {\n            enumerable: true\n          });\n        }\n      },\n      propTypes: {\n        configurable: true,\n        get: function () {\n          return propTypes;\n        },\n        set: function (newPropTypes) {\n          error('React.lazy(...): It is not supported to assign `propTypes` to ' + 'a lazy component import. Either specify them where the component ' + 'is defined, or create a wrapping component around it.');\n\n          propTypes = newPropTypes; // Match production behavior more closely:\n          // $FlowFixMe\n\n          Object.defineProperty(lazyType, 'propTypes', {\n            enumerable: true\n          });\n        }\n      }\n    });\n  }\n\n  return lazyType;\n}\n\nfunction forwardRef(render) {\n  {\n    if (render != null && render.$$typeof === REACT_MEMO_TYPE) {\n      error('forwardRef requires a render function but received a `memo` ' + 'component. Instead of forwardRef(memo(...)), use ' + 'memo(forwardRef(...)).');\n    } else if (typeof render !== 'function') {\n      error('forwardRef requires a render function but was given %s.', render === null ? 'null' : typeof render);\n    } else {\n      if (render.length !== 0 && render.length !== 2) {\n        error('forwardRef render functions accept exactly two parameters: props and ref. %s', render.length === 1 ? 'Did you forget to use the ref parameter?' : 'Any additional parameter will be undefined.');\n      }\n    }\n\n    if (render != null) {\n      if (render.defaultProps != null || render.propTypes != null) {\n        error('forwardRef render functions do not support propTypes or defaultProps. ' + 'Did you accidentally pass a React component?');\n      }\n    }\n  }\n\n  var elementType = {\n    $$typeof: REACT_FORWARD_REF_TYPE,\n    render: render\n  };\n\n  {\n    var ownName;\n    Object.defineProperty(elementType, 'displayName', {\n      enumerable: false,\n      configurable: true,\n      get: function () {\n        return ownName;\n      },\n      set: function (name) {\n        ownName = name;\n\n        if (render.displayName == null) {\n          render.displayName = name;\n        }\n      }\n    });\n  }\n\n  return elementType;\n}\n\n// Filter certain DOM attributes (e.g. src, href) if their values are empty strings.\n\nvar enableScopeAPI = false; // Experimental Create Event Handle API.\n\nfunction isValidElementType(type) {\n  if (typeof type === 'string' || typeof type === 'function') {\n    return true;\n  } // Note: typeof might be other than 'symbol' or 'number' (e.g. if it's a polyfill).\n\n\n  if (type === exports.Fragment || type === exports.Profiler || type === REACT_DEBUG_TRACING_MODE_TYPE || type === exports.StrictMode || type === exports.Suspense || type === REACT_SUSPENSE_LIST_TYPE || type === REACT_LEGACY_HIDDEN_TYPE || enableScopeAPI ) {\n    return true;\n  }\n\n  if (typeof type === 'object' && type !== null) {\n    if (type.$$typeof === REACT_LAZY_TYPE || type.$$typeof === REACT_MEMO_TYPE || type.$$typeof === REACT_PROVIDER_TYPE || type.$$typeof === REACT_CONTEXT_TYPE || type.$$typeof === REACT_FORWARD_REF_TYPE || type.$$typeof === REACT_FUNDAMENTAL_TYPE || type.$$typeof === REACT_BLOCK_TYPE || type[0] === REACT_SERVER_BLOCK_TYPE) {\n      return true;\n    }\n  }\n\n  return false;\n}\n\nfunction memo(type, compare) {\n  {\n    if (!isValidElementType(type)) {\n      error('memo: The first argument must be a component. Instead ' + 'received: %s', type === null ? 'null' : typeof type);\n    }\n  }\n\n  var elementType = {\n    $$typeof: REACT_MEMO_TYPE,\n    type: type,\n    compare: compare === undefined ? null : compare\n  };\n\n  {\n    var ownName;\n    Object.defineProperty(elementType, 'displayName', {\n      enumerable: false,\n      configurable: true,\n      get: function () {\n        return ownName;\n      },\n      set: function (name) {\n        ownName = name;\n\n        if (type.displayName == null) {\n          type.displayName = name;\n        }\n      }\n    });\n  }\n\n  return elementType;\n}\n\nfunction resolveDispatcher() {\n  var dispatcher = ReactCurrentDispatcher.current;\n\n  if (!(dispatcher !== null)) {\n    {\n      throw Error( \"Invalid hook call. Hooks can only be called inside of the body of a function component. This could happen for one of the following reasons:\\n1. You might have mismatching versions of React and the renderer (such as React DOM)\\n2. You might be breaking the Rules of Hooks\\n3. You might have more than one copy of React in the same app\\nSee https://reactjs.org/link/invalid-hook-call for tips about how to debug and fix this problem.\" );\n    }\n  }\n\n  return dispatcher;\n}\n\nfunction useContext(Context, unstable_observedBits) {\n  var dispatcher = resolveDispatcher();\n\n  {\n    if (unstable_observedBits !== undefined) {\n      error('useContext() second argument is reserved for future ' + 'use in React. Passing it is not supported. ' + 'You passed: %s.%s', unstable_observedBits, typeof unstable_observedBits === 'number' && Array.isArray(arguments[2]) ? '\\n\\nDid you call array.map(useContext)? ' + 'Calling Hooks inside a loop is not supported. ' + 'Learn more at https://reactjs.org/link/rules-of-hooks' : '');\n    } // TODO: add a more generic warning for invalid values.\n\n\n    if (Context._context !== undefined) {\n      var realContext = Context._context; // Don't deduplicate because this legitimately causes bugs\n      // and nobody should be using this in existing code.\n\n      if (realContext.Consumer === Context) {\n        error('Calling useContext(Context.Consumer) is not supported, may cause bugs, and will be ' + 'removed in a future major release. Did you mean to call useContext(Context) instead?');\n      } else if (realContext.Provider === Context) {\n        error('Calling useContext(Context.Provider) is not supported. ' + 'Did you mean to call useContext(Context) instead?');\n      }\n    }\n  }\n\n  return dispatcher.useContext(Context, unstable_observedBits);\n}\nfunction useState(initialState) {\n  var dispatcher = resolveDispatcher();\n  return dispatcher.useState(initialState);\n}\nfunction useReducer(reducer, initialArg, init) {\n  var dispatcher = resolveDispatcher();\n  return dispatcher.useReducer(reducer, initialArg, init);\n}\nfunction useRef(initialValue) {\n  var dispatcher = resolveDispatcher();\n  return dispatcher.useRef(initialValue);\n}\nfunction useEffect(create, deps) {\n  var dispatcher = resolveDispatcher();\n  return dispatcher.useEffect(create, deps);\n}\nfunction useLayoutEffect(create, deps) {\n  var dispatcher = resolveDispatcher();\n  return dispatcher.useLayoutEffect(create, deps);\n}\nfunction useCallback(callback, deps) {\n  var dispatcher = resolveDispatcher();\n  return dispatcher.useCallback(callback, deps);\n}\nfunction useMemo(create, deps) {\n  var dispatcher = resolveDispatcher();\n  return dispatcher.useMemo(create, deps);\n}\nfunction useImperativeHandle(ref, create, deps) {\n  var dispatcher = resolveDispatcher();\n  return dispatcher.useImperativeHandle(ref, create, deps);\n}\nfunction useDebugValue(value, formatterFn) {\n  {\n    var dispatcher = resolveDispatcher();\n    return dispatcher.useDebugValue(value, formatterFn);\n  }\n}\n\n// Helpers to patch console.logs to avoid logging during side-effect free\n// replaying on render function. This currently only patches the object\n// lazily which won't cover if the log function was extracted eagerly.\n// We could also eagerly patch the method.\nvar disabledDepth = 0;\nvar prevLog;\nvar prevInfo;\nvar prevWarn;\nvar prevError;\nvar prevGroup;\nvar prevGroupCollapsed;\nvar prevGroupEnd;\n\nfunction disabledLog() {}\n\ndisabledLog.__reactDisabledLog = true;\nfunction disableLogs() {\n  {\n    if (disabledDepth === 0) {\n      /* eslint-disable react-internal/no-production-logging */\n      prevLog = console.log;\n      prevInfo = console.info;\n      prevWarn = console.warn;\n      prevError = console.error;\n      prevGroup = console.group;\n      prevGroupCollapsed = console.groupCollapsed;\n      prevGroupEnd = console.groupEnd; // https://github.com/facebook/react/issues/19099\n\n      var props = {\n        configurable: true,\n        enumerable: true,\n        value: disabledLog,\n        writable: true\n      }; // $FlowFixMe Flow thinks console is immutable.\n\n      Object.defineProperties(console, {\n        info: props,\n        log: props,\n        warn: props,\n        error: props,\n        group: props,\n        groupCollapsed: props,\n        groupEnd: props\n      });\n      /* eslint-enable react-internal/no-production-logging */\n    }\n\n    disabledDepth++;\n  }\n}\nfunction reenableLogs() {\n  {\n    disabledDepth--;\n\n    if (disabledDepth === 0) {\n      /* eslint-disable react-internal/no-production-logging */\n      var props = {\n        configurable: true,\n        enumerable: true,\n        writable: true\n      }; // $FlowFixMe Flow thinks console is immutable.\n\n      Object.defineProperties(console, {\n        log: _assign({}, props, {\n          value: prevLog\n        }),\n        info: _assign({}, props, {\n          value: prevInfo\n        }),\n        warn: _assign({}, props, {\n          value: prevWarn\n        }),\n        error: _assign({}, props, {\n          value: prevError\n        }),\n        group: _assign({}, props, {\n          value: prevGroup\n        }),\n        groupCollapsed: _assign({}, props, {\n          value: prevGroupCollapsed\n        }),\n        groupEnd: _assign({}, props, {\n          value: prevGroupEnd\n        })\n      });\n      /* eslint-enable react-internal/no-production-logging */\n    }\n\n    if (disabledDepth < 0) {\n      error('disabledDepth fell below zero. ' + 'This is a bug in React. Please file an issue.');\n    }\n  }\n}\n\nvar ReactCurrentDispatcher$1 = ReactSharedInternals.ReactCurrentDispatcher;\nvar prefix;\nfunction describeBuiltInComponentFrame(name, source, ownerFn) {\n  {\n    if (prefix === undefined) {\n      // Extract the VM specific prefix used by each line.\n      try {\n        throw Error();\n      } catch (x) {\n        var match = x.stack.trim().match(/\\n( *(at )?)/);\n        prefix = match && match[1] || '';\n      }\n    } // We use the prefix to ensure our stacks line up with native stack frames.\n\n\n    return '\\n' + prefix + name;\n  }\n}\nvar reentry = false;\nvar componentFrameCache;\n\n{\n  var PossiblyWeakMap = typeof WeakMap === 'function' ? WeakMap : Map;\n  componentFrameCache = new PossiblyWeakMap();\n}\n\nfunction describeNativeComponentFrame(fn, construct) {\n  // If something asked for a stack inside a fake render, it should get ignored.\n  if (!fn || reentry) {\n    return '';\n  }\n\n  {\n    var frame = componentFrameCache.get(fn);\n\n    if (frame !== undefined) {\n      return frame;\n    }\n  }\n\n  var control;\n  reentry = true;\n  var previousPrepareStackTrace = Error.prepareStackTrace; // $FlowFixMe It does accept undefined.\n\n  Error.prepareStackTrace = undefined;\n  var previousDispatcher;\n\n  {\n    previousDispatcher = ReactCurrentDispatcher$1.current; // Set the dispatcher in DEV because this might be call in the render function\n    // for warnings.\n\n    ReactCurrentDispatcher$1.current = null;\n    disableLogs();\n  }\n\n  try {\n    // This should throw.\n    if (construct) {\n      // Something should be setting the props in the constructor.\n      var Fake = function () {\n        throw Error();\n      }; // $FlowFixMe\n\n\n      Object.defineProperty(Fake.prototype, 'props', {\n        set: function () {\n          // We use a throwing setter instead of frozen or non-writable props\n          // because that won't throw in a non-strict mode function.\n          throw Error();\n        }\n      });\n\n      if (typeof Reflect === 'object' && Reflect.construct) {\n        // We construct a different control for this case to include any extra\n        // frames added by the construct call.\n        try {\n          Reflect.construct(Fake, []);\n        } catch (x) {\n          control = x;\n        }\n\n        Reflect.construct(fn, [], Fake);\n      } else {\n        try {\n          Fake.call();\n        } catch (x) {\n          control = x;\n        }\n\n        fn.call(Fake.prototype);\n      }\n    } else {\n      try {\n        throw Error();\n      } catch (x) {\n        control = x;\n      }\n\n      fn();\n    }\n  } catch (sample) {\n    // This is inlined manually because closure doesn't do it for us.\n    if (sample && control && typeof sample.stack === 'string') {\n      // This extracts the first frame from the sample that isn't also in the control.\n      // Skipping one frame that we assume is the frame that calls the two.\n      var sampleLines = sample.stack.split('\\n');\n      var controlLines = control.stack.split('\\n');\n      var s = sampleLines.length - 1;\n      var c = controlLines.length - 1;\n\n      while (s >= 1 && c >= 0 && sampleLines[s] !== controlLines[c]) {\n        // We expect at least one stack frame to be shared.\n        // Typically this will be the root most one. However, stack frames may be\n        // cut off due to maximum stack limits. In this case, one maybe cut off\n        // earlier than the other. We assume that the sample is longer or the same\n        // and there for cut off earlier. So we should find the root most frame in\n        // the sample somewhere in the control.\n        c--;\n      }\n\n      for (; s >= 1 && c >= 0; s--, c--) {\n        // Next we find the first one that isn't the same which should be the\n        // frame that called our sample function and the control.\n        if (sampleLines[s] !== controlLines[c]) {\n          // In V8, the first line is describing the message but other VMs don't.\n          // If we're about to return the first line, and the control is also on the same\n          // line, that's a pretty good indicator that our sample threw at same line as\n          // the control. I.e. before we entered the sample frame. So we ignore this result.\n          // This can happen if you passed a class to function component, or non-function.\n          if (s !== 1 || c !== 1) {\n            do {\n              s--;\n              c--; // We may still have similar intermediate frames from the construct call.\n              // The next one that isn't the same should be our match though.\n\n              if (c < 0 || sampleLines[s] !== controlLines[c]) {\n                // V8 adds a \"new\" prefix for native classes. Let's remove it to make it prettier.\n                var _frame = '\\n' + sampleLines[s].replace(' at new ', ' at ');\n\n                {\n                  if (typeof fn === 'function') {\n                    componentFrameCache.set(fn, _frame);\n                  }\n                } // Return the line we found.\n\n\n                return _frame;\n              }\n            } while (s >= 1 && c >= 0);\n          }\n\n          break;\n        }\n      }\n    }\n  } finally {\n    reentry = false;\n\n    {\n      ReactCurrentDispatcher$1.current = previousDispatcher;\n      reenableLogs();\n    }\n\n    Error.prepareStackTrace = previousPrepareStackTrace;\n  } // Fallback to just using the name if we couldn't make it throw.\n\n\n  var name = fn ? fn.displayName || fn.name : '';\n  var syntheticFrame = name ? describeBuiltInComponentFrame(name) : '';\n\n  {\n    if (typeof fn === 'function') {\n      componentFrameCache.set(fn, syntheticFrame);\n    }\n  }\n\n  return syntheticFrame;\n}\nfunction describeFunctionComponentFrame(fn, source, ownerFn) {\n  {\n    return describeNativeComponentFrame(fn, false);\n  }\n}\n\nfunction shouldConstruct(Component) {\n  var prototype = Component.prototype;\n  return !!(prototype && prototype.isReactComponent);\n}\n\nfunction describeUnknownElementTypeFrameInDEV(type, source, ownerFn) {\n\n  if (type == null) {\n    return '';\n  }\n\n  if (typeof type === 'function') {\n    {\n      return describeNativeComponentFrame(type, shouldConstruct(type));\n    }\n  }\n\n  if (typeof type === 'string') {\n    return describeBuiltInComponentFrame(type);\n  }\n\n  switch (type) {\n    case exports.Suspense:\n      return describeBuiltInComponentFrame('Suspense');\n\n    case REACT_SUSPENSE_LIST_TYPE:\n      return describeBuiltInComponentFrame('SuspenseList');\n  }\n\n  if (typeof type === 'object') {\n    switch (type.$$typeof) {\n      case REACT_FORWARD_REF_TYPE:\n        return describeFunctionComponentFrame(type.render);\n\n      case REACT_MEMO_TYPE:\n        // Memo may contain any component type so we recursively resolve it.\n        return describeUnknownElementTypeFrameInDEV(type.type, source, ownerFn);\n\n      case REACT_BLOCK_TYPE:\n        return describeFunctionComponentFrame(type._render);\n\n      case REACT_LAZY_TYPE:\n        {\n          var lazyComponent = type;\n          var payload = lazyComponent._payload;\n          var init = lazyComponent._init;\n\n          try {\n            // Lazy may contain any component type so we recursively resolve it.\n            return describeUnknownElementTypeFrameInDEV(init(payload), source, ownerFn);\n          } catch (x) {}\n        }\n    }\n  }\n\n  return '';\n}\n\nvar loggedTypeFailures = {};\nvar ReactDebugCurrentFrame$1 = ReactSharedInternals.ReactDebugCurrentFrame;\n\nfunction setCurrentlyValidatingElement(element) {\n  {\n    if (element) {\n      var owner = element._owner;\n      var stack = describeUnknownElementTypeFrameInDEV(element.type, element._source, owner ? owner.type : null);\n      ReactDebugCurrentFrame$1.setExtraStackFrame(stack);\n    } else {\n      ReactDebugCurrentFrame$1.setExtraStackFrame(null);\n    }\n  }\n}\n\nfunction checkPropTypes(typeSpecs, values, location, componentName, element) {\n  {\n    // $FlowFixMe This is okay but Flow doesn't know it.\n    var has = Function.call.bind(Object.prototype.hasOwnProperty);\n\n    for (var typeSpecName in typeSpecs) {\n      if (has(typeSpecs, typeSpecName)) {\n        var error$1 = void 0; // Prop type validation may throw. In case they do, we don't want to\n        // fail the render phase where it didn't fail before. So we log it.\n        // After these have been cleaned up, we'll let them throw.\n\n        try {\n          // This is intentionally an invariant that gets caught. It's the same\n          // behavior as without this statement except with a better message.\n          if (typeof typeSpecs[typeSpecName] !== 'function') {\n            var err = Error((componentName || 'React class') + ': ' + location + ' type `' + typeSpecName + '` is invalid; ' + 'it must be a function, usually from the `prop-types` package, but received `' + typeof typeSpecs[typeSpecName] + '`.' + 'This often happens because of typos such as `PropTypes.function` instead of `PropTypes.func`.');\n            err.name = 'Invariant Violation';\n            throw err;\n          }\n\n          error$1 = typeSpecs[typeSpecName](values, typeSpecName, componentName, location, null, 'SECRET_DO_NOT_PASS_THIS_OR_YOU_WILL_BE_FIRED');\n        } catch (ex) {\n          error$1 = ex;\n        }\n\n        if (error$1 && !(error$1 instanceof Error)) {\n          setCurrentlyValidatingElement(element);\n\n          error('%s: type specification of %s' + ' `%s` is invalid; the type checker ' + 'function must return `null` or an `Error` but returned a %s. ' + 'You may have forgotten to pass an argument to the type checker ' + 'creator (arrayOf, instanceOf, objectOf, oneOf, oneOfType, and ' + 'shape all require an argument).', componentName || 'React class', location, typeSpecName, typeof error$1);\n\n          setCurrentlyValidatingElement(null);\n        }\n\n        if (error$1 instanceof Error && !(error$1.message in loggedTypeFailures)) {\n          // Only monitor this failure once because there tends to be a lot of the\n          // same error.\n          loggedTypeFailures[error$1.message] = true;\n          setCurrentlyValidatingElement(element);\n\n          error('Failed %s type: %s', location, error$1.message);\n\n          setCurrentlyValidatingElement(null);\n        }\n      }\n    }\n  }\n}\n\nfunction setCurrentlyValidatingElement$1(element) {\n  {\n    if (element) {\n      var owner = element._owner;\n      var stack = describeUnknownElementTypeFrameInDEV(element.type, element._source, owner ? owner.type : null);\n      setExtraStackFrame(stack);\n    } else {\n      setExtraStackFrame(null);\n    }\n  }\n}\n\nvar propTypesMisspellWarningShown;\n\n{\n  propTypesMisspellWarningShown = false;\n}\n\nfunction getDeclarationErrorAddendum() {\n  if (ReactCurrentOwner.current) {\n    var name = getComponentName(ReactCurrentOwner.current.type);\n\n    if (name) {\n      return '\\n\\nCheck the render method of `' + name + '`.';\n    }\n  }\n\n  return '';\n}\n\nfunction getSourceInfoErrorAddendum(source) {\n  if (source !== undefined) {\n    var fileName = source.fileName.replace(/^.*[\\\\\\/]/, '');\n    var lineNumber = source.lineNumber;\n    return '\\n\\nCheck your code at ' + fileName + ':' + lineNumber + '.';\n  }\n\n  return '';\n}\n\nfunction getSourceInfoErrorAddendumForProps(elementProps) {\n  if (elementProps !== null && elementProps !== undefined) {\n    return getSourceInfoErrorAddendum(elementProps.__source);\n  }\n\n  return '';\n}\n/**\n * Warn if there's no key explicitly set on dynamic arrays of children or\n * object keys are not valid. This allows us to keep track of children between\n * updates.\n */\n\n\nvar ownerHasKeyUseWarning = {};\n\nfunction getCurrentComponentErrorInfo(parentType) {\n  var info = getDeclarationErrorAddendum();\n\n  if (!info) {\n    var parentName = typeof parentType === 'string' ? parentType : parentType.displayName || parentType.name;\n\n    if (parentName) {\n      info = \"\\n\\nCheck the top-level render call using <\" + parentName + \">.\";\n    }\n  }\n\n  return info;\n}\n/**\n * Warn if the element doesn't have an explicit key assigned to it.\n * This element is in an array. The array could grow and shrink or be\n * reordered. All children that haven't already been validated are required to\n * have a \"key\" property assigned to it. Error statuses are cached so a warning\n * will only be shown once.\n *\n * @internal\n * @param {ReactElement} element Element that requires a key.\n * @param {*} parentType element's parent's type.\n */\n\n\nfunction validateExplicitKey(element, parentType) {\n  if (!element._store || element._store.validated || element.key != null) {\n    return;\n  }\n\n  element._store.validated = true;\n  var currentComponentErrorInfo = getCurrentComponentErrorInfo(parentType);\n\n  if (ownerHasKeyUseWarning[currentComponentErrorInfo]) {\n    return;\n  }\n\n  ownerHasKeyUseWarning[currentComponentErrorInfo] = true; // Usually the current owner is the offender, but if it accepts children as a\n  // property, it may be the creator of the child that's responsible for\n  // assigning it a key.\n\n  var childOwner = '';\n\n  if (element && element._owner && element._owner !== ReactCurrentOwner.current) {\n    // Give the component that originally created this child.\n    childOwner = \" It was passed a child from \" + getComponentName(element._owner.type) + \".\";\n  }\n\n  {\n    setCurrentlyValidatingElement$1(element);\n\n    error('Each child in a list should have a unique \"key\" prop.' + '%s%s See https://reactjs.org/link/warning-keys for more information.', currentComponentErrorInfo, childOwner);\n\n    setCurrentlyValidatingElement$1(null);\n  }\n}\n/**\n * Ensure that every element either is passed in a static location, in an\n * array with an explicit keys property defined, or in an object literal\n * with valid key property.\n *\n * @internal\n * @param {ReactNode} node Statically passed child of any type.\n * @param {*} parentType node's parent's type.\n */\n\n\nfunction validateChildKeys(node, parentType) {\n  if (typeof node !== 'object') {\n    return;\n  }\n\n  if (Array.isArray(node)) {\n    for (var i = 0; i < node.length; i++) {\n      var child = node[i];\n\n      if (isValidElement(child)) {\n        validateExplicitKey(child, parentType);\n      }\n    }\n  } else if (isValidElement(node)) {\n    // This element was passed in a valid location.\n    if (node._store) {\n      node._store.validated = true;\n    }\n  } else if (node) {\n    var iteratorFn = getIteratorFn(node);\n\n    if (typeof iteratorFn === 'function') {\n      // Entry iterators used to provide implicit keys,\n      // but now we print a separate warning for them later.\n      if (iteratorFn !== node.entries) {\n        var iterator = iteratorFn.call(node);\n        var step;\n\n        while (!(step = iterator.next()).done) {\n          if (isValidElement(step.value)) {\n            validateExplicitKey(step.value, parentType);\n          }\n        }\n      }\n    }\n  }\n}\n/**\n * Given an element, validate that its props follow the propTypes definition,\n * provided by the type.\n *\n * @param {ReactElement} element\n */\n\n\nfunction validatePropTypes(element) {\n  {\n    var type = element.type;\n\n    if (type === null || type === undefined || typeof type === 'string') {\n      return;\n    }\n\n    var propTypes;\n\n    if (typeof type === 'function') {\n      propTypes = type.propTypes;\n    } else if (typeof type === 'object' && (type.$$typeof === REACT_FORWARD_REF_TYPE || // Note: Memo only checks outer props here.\n    // Inner props are checked in the reconciler.\n    type.$$typeof === REACT_MEMO_TYPE)) {\n      propTypes = type.propTypes;\n    } else {\n      return;\n    }\n\n    if (propTypes) {\n      // Intentionally inside to avoid triggering lazy initializers:\n      var name = getComponentName(type);\n      checkPropTypes(propTypes, element.props, 'prop', name, element);\n    } else if (type.PropTypes !== undefined && !propTypesMisspellWarningShown) {\n      propTypesMisspellWarningShown = true; // Intentionally inside to avoid triggering lazy initializers:\n\n      var _name = getComponentName(type);\n\n      error('Component %s declared `PropTypes` instead of `propTypes`. Did you misspell the property assignment?', _name || 'Unknown');\n    }\n\n    if (typeof type.getDefaultProps === 'function' && !type.getDefaultProps.isReactClassApproved) {\n      error('getDefaultProps is only used on classic React.createClass ' + 'definitions. Use a static property named `defaultProps` instead.');\n    }\n  }\n}\n/**\n * Given a fragment, validate that it can only be provided with fragment props\n * @param {ReactElement} fragment\n */\n\n\nfunction validateFragmentProps(fragment) {\n  {\n    var keys = Object.keys(fragment.props);\n\n    for (var i = 0; i < keys.length; i++) {\n      var key = keys[i];\n\n      if (key !== 'children' && key !== 'key') {\n        setCurrentlyValidatingElement$1(fragment);\n\n        error('Invalid prop `%s` supplied to `React.Fragment`. ' + 'React.Fragment can only have `key` and `children` props.', key);\n\n        setCurrentlyValidatingElement$1(null);\n        break;\n      }\n    }\n\n    if (fragment.ref !== null) {\n      setCurrentlyValidatingElement$1(fragment);\n\n      error('Invalid attribute `ref` supplied to `React.Fragment`.');\n\n      setCurrentlyValidatingElement$1(null);\n    }\n  }\n}\nfunction createElementWithValidation(type, props, children) {\n  var validType = isValidElementType(type); // We warn in this case but don't throw. We expect the element creation to\n  // succeed and there will likely be errors in render.\n\n  if (!validType) {\n    var info = '';\n\n    if (type === undefined || typeof type === 'object' && type !== null && Object.keys(type).length === 0) {\n      info += ' You likely forgot to export your component from the file ' + \"it's defined in, or you might have mixed up default and named imports.\";\n    }\n\n    var sourceInfo = getSourceInfoErrorAddendumForProps(props);\n\n    if (sourceInfo) {\n      info += sourceInfo;\n    } else {\n      info += getDeclarationErrorAddendum();\n    }\n\n    var typeString;\n\n    if (type === null) {\n      typeString = 'null';\n    } else if (Array.isArray(type)) {\n      typeString = 'array';\n    } else if (type !== undefined && type.$$typeof === REACT_ELEMENT_TYPE) {\n      typeString = \"<\" + (getComponentName(type.type) || 'Unknown') + \" />\";\n      info = ' Did you accidentally export a JSX literal instead of a component?';\n    } else {\n      typeString = typeof type;\n    }\n\n    {\n      error('React.createElement: type is invalid -- expected a string (for ' + 'built-in components) or a class/function (for composite ' + 'components) but got: %s.%s', typeString, info);\n    }\n  }\n\n  var element = createElement.apply(this, arguments); // The result can be nullish if a mock or a custom function is used.\n  // TODO: Drop this when these are no longer allowed as the type argument.\n\n  if (element == null) {\n    return element;\n  } // Skip key warning if the type isn't valid since our key validation logic\n  // doesn't expect a non-string/function type and can throw confusing errors.\n  // We don't want exception behavior to differ between dev and prod.\n  // (Rendering will throw with a helpful message and as soon as the type is\n  // fixed, the key warnings will appear.)\n\n\n  if (validType) {\n    for (var i = 2; i < arguments.length; i++) {\n      validateChildKeys(arguments[i], type);\n    }\n  }\n\n  if (type === exports.Fragment) {\n    validateFragmentProps(element);\n  } else {\n    validatePropTypes(element);\n  }\n\n  return element;\n}\nvar didWarnAboutDeprecatedCreateFactory = false;\nfunction createFactoryWithValidation(type) {\n  var validatedFactory = createElementWithValidation.bind(null, type);\n  validatedFactory.type = type;\n\n  {\n    if (!didWarnAboutDeprecatedCreateFactory) {\n      didWarnAboutDeprecatedCreateFactory = true;\n\n      warn('React.createFactory() is deprecated and will be removed in ' + 'a future major release. Consider using JSX ' + 'or use React.createElement() directly instead.');\n    } // Legacy hook: remove it\n\n\n    Object.defineProperty(validatedFactory, 'type', {\n      enumerable: false,\n      get: function () {\n        warn('Factory.type is deprecated. Access the class directly ' + 'before passing it to createFactory.');\n\n        Object.defineProperty(this, 'type', {\n          value: type\n        });\n        return type;\n      }\n    });\n  }\n\n  return validatedFactory;\n}\nfunction cloneElementWithValidation(element, props, children) {\n  var newElement = cloneElement.apply(this, arguments);\n\n  for (var i = 2; i < arguments.length; i++) {\n    validateChildKeys(arguments[i], newElement.type);\n  }\n\n  validatePropTypes(newElement);\n  return newElement;\n}\n\n{\n\n  try {\n    var frozenObject = Object.freeze({});\n    /* eslint-disable no-new */\n\n    new Map([[frozenObject, null]]);\n    new Set([frozenObject]);\n    /* eslint-enable no-new */\n  } catch (e) {\n  }\n}\n\nvar createElement$1 =  createElementWithValidation ;\nvar cloneElement$1 =  cloneElementWithValidation ;\nvar createFactory =  createFactoryWithValidation ;\nvar Children = {\n  map: mapChildren,\n  forEach: forEachChildren,\n  count: countChildren,\n  toArray: toArray,\n  only: onlyChild\n};\n\nexports.Children = Children;\nexports.Component = Component;\nexports.PureComponent = PureComponent;\nexports.__SECRET_INTERNALS_DO_NOT_USE_OR_YOU_WILL_BE_FIRED = ReactSharedInternals;\nexports.cloneElement = cloneElement$1;\nexports.createContext = createContext;\nexports.createElement = createElement$1;\nexports.createFactory = createFactory;\nexports.createRef = createRef;\nexports.forwardRef = forwardRef;\nexports.isValidElement = isValidElement;\nexports.lazy = lazy;\nexports.memo = memo;\nexports.useCallback = useCallback;\nexports.useContext = useContext;\nexports.useDebugValue = useDebugValue;\nexports.useEffect = useEffect;\nexports.useImperativeHandle = useImperativeHandle;\nexports.useLayoutEffect = useLayoutEffect;\nexports.useMemo = useMemo;\nexports.useReducer = useReducer;\nexports.useRef = useRef;\nexports.useState = useState;\nexports.version = ReactVersion;\n  })();\n}\n","'use strict';\n\nif (process.env.NODE_ENV === 'production') {\n  module.exports = require('./cjs/react.production.min.js');\n} else {\n  module.exports = require('./cjs/react.development.js');\n}\n","/** @license React v0.20.2\n * scheduler-tracing.development.js\n *\n * Copyright (c) Facebook, Inc. and its affiliates.\n *\n * This source code is licensed under the MIT license found in the\n * LICENSE file in the root directory of this source tree.\n */\n\n'use strict';\n\nif (process.env.NODE_ENV !== \"production\") {\n  (function() {\n'use strict';\n\nvar DEFAULT_THREAD_ID = 0; // Counters used to generate unique IDs.\n\nvar interactionIDCounter = 0;\nvar threadIDCounter = 0; // Set of currently traced interactions.\n// Interactions \"stack\"–\n// Meaning that newly traced interactions are appended to the previously active set.\n// When an interaction goes out of scope, the previous set (if any) is restored.\n\nexports.__interactionsRef = null; // Listener(s) to notify when interactions begin and end.\n\nexports.__subscriberRef = null;\n\n{\n  exports.__interactionsRef = {\n    current: new Set()\n  };\n  exports.__subscriberRef = {\n    current: null\n  };\n}\nfunction unstable_clear(callback) {\n\n  var prevInteractions = exports.__interactionsRef.current;\n  exports.__interactionsRef.current = new Set();\n\n  try {\n    return callback();\n  } finally {\n    exports.__interactionsRef.current = prevInteractions;\n  }\n}\nfunction unstable_getCurrent() {\n  {\n    return exports.__interactionsRef.current;\n  }\n}\nfunction unstable_getThreadID() {\n  return ++threadIDCounter;\n}\nfunction unstable_trace(name, timestamp, callback) {\n  var threadID = arguments.length > 3 && arguments[3] !== undefined ? arguments[3] : DEFAULT_THREAD_ID;\n\n  var interaction = {\n    __count: 1,\n    id: interactionIDCounter++,\n    name: name,\n    timestamp: timestamp\n  };\n  var prevInteractions = exports.__interactionsRef.current; // Traced interactions should stack/accumulate.\n  // To do that, clone the current interactions.\n  // The previous set will be restored upon completion.\n\n  var interactions = new Set(prevInteractions);\n  interactions.add(interaction);\n  exports.__interactionsRef.current = interactions;\n  var subscriber = exports.__subscriberRef.current;\n  var returnValue;\n\n  try {\n    if (subscriber !== null) {\n      subscriber.onInteractionTraced(interaction);\n    }\n  } finally {\n    try {\n      if (subscriber !== null) {\n        subscriber.onWorkStarted(interactions, threadID);\n      }\n    } finally {\n      try {\n        returnValue = callback();\n      } finally {\n        exports.__interactionsRef.current = prevInteractions;\n\n        try {\n          if (subscriber !== null) {\n            subscriber.onWorkStopped(interactions, threadID);\n          }\n        } finally {\n          interaction.__count--; // If no async work was scheduled for this interaction,\n          // Notify subscribers that it's completed.\n\n          if (subscriber !== null && interaction.__count === 0) {\n            subscriber.onInteractionScheduledWorkCompleted(interaction);\n          }\n        }\n      }\n    }\n  }\n\n  return returnValue;\n}\nfunction unstable_wrap(callback) {\n  var threadID = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : DEFAULT_THREAD_ID;\n\n  var wrappedInteractions = exports.__interactionsRef.current;\n  var subscriber = exports.__subscriberRef.current;\n\n  if (subscriber !== null) {\n    subscriber.onWorkScheduled(wrappedInteractions, threadID);\n  } // Update the pending async work count for the current interactions.\n  // Update after calling subscribers in case of error.\n\n\n  wrappedInteractions.forEach(function (interaction) {\n    interaction.__count++;\n  });\n  var hasRun = false;\n\n  function wrapped() {\n    var prevInteractions = exports.__interactionsRef.current;\n    exports.__interactionsRef.current = wrappedInteractions;\n    subscriber = exports.__subscriberRef.current;\n\n    try {\n      var returnValue;\n\n      try {\n        if (subscriber !== null) {\n          subscriber.onWorkStarted(wrappedInteractions, threadID);\n        }\n      } finally {\n        try {\n          returnValue = callback.apply(undefined, arguments);\n        } finally {\n          exports.__interactionsRef.current = prevInteractions;\n\n          if (subscriber !== null) {\n            subscriber.onWorkStopped(wrappedInteractions, threadID);\n          }\n        }\n      }\n\n      return returnValue;\n    } finally {\n      if (!hasRun) {\n        // We only expect a wrapped function to be executed once,\n        // But in the event that it's executed more than once–\n        // Only decrement the outstanding interaction counts once.\n        hasRun = true; // Update pending async counts for all wrapped interactions.\n        // If this was the last scheduled async work for any of them,\n        // Mark them as completed.\n\n        wrappedInteractions.forEach(function (interaction) {\n          interaction.__count--;\n\n          if (subscriber !== null && interaction.__count === 0) {\n            subscriber.onInteractionScheduledWorkCompleted(interaction);\n          }\n        });\n      }\n    }\n  }\n\n  wrapped.cancel = function cancel() {\n    subscriber = exports.__subscriberRef.current;\n\n    try {\n      if (subscriber !== null) {\n        subscriber.onWorkCanceled(wrappedInteractions, threadID);\n      }\n    } finally {\n      // Update pending async counts for all wrapped interactions.\n      // If this was the last scheduled async work for any of them,\n      // Mark them as completed.\n      wrappedInteractions.forEach(function (interaction) {\n        interaction.__count--;\n\n        if (subscriber && interaction.__count === 0) {\n          subscriber.onInteractionScheduledWorkCompleted(interaction);\n        }\n      });\n    }\n  };\n\n  return wrapped;\n}\n\nvar subscribers = null;\n\n{\n  subscribers = new Set();\n}\n\nfunction unstable_subscribe(subscriber) {\n  {\n    subscribers.add(subscriber);\n\n    if (subscribers.size === 1) {\n      exports.__subscriberRef.current = {\n        onInteractionScheduledWorkCompleted: onInteractionScheduledWorkCompleted,\n        onInteractionTraced: onInteractionTraced,\n        onWorkCanceled: onWorkCanceled,\n        onWorkScheduled: onWorkScheduled,\n        onWorkStarted: onWorkStarted,\n        onWorkStopped: onWorkStopped\n      };\n    }\n  }\n}\nfunction unstable_unsubscribe(subscriber) {\n  {\n    subscribers.delete(subscriber);\n\n    if (subscribers.size === 0) {\n      exports.__subscriberRef.current = null;\n    }\n  }\n}\n\nfunction onInteractionTraced(interaction) {\n  var didCatchError = false;\n  var caughtError = null;\n  subscribers.forEach(function (subscriber) {\n    try {\n      subscriber.onInteractionTraced(interaction);\n    } catch (error) {\n      if (!didCatchError) {\n        didCatchError = true;\n        caughtError = error;\n      }\n    }\n  });\n\n  if (didCatchError) {\n    throw caughtError;\n  }\n}\n\nfunction onInteractionScheduledWorkCompleted(interaction) {\n  var didCatchError = false;\n  var caughtError = null;\n  subscribers.forEach(function (subscriber) {\n    try {\n      subscriber.onInteractionScheduledWorkCompleted(interaction);\n    } catch (error) {\n      if (!didCatchError) {\n        didCatchError = true;\n        caughtError = error;\n      }\n    }\n  });\n\n  if (didCatchError) {\n    throw caughtError;\n  }\n}\n\nfunction onWorkScheduled(interactions, threadID) {\n  var didCatchError = false;\n  var caughtError = null;\n  subscribers.forEach(function (subscriber) {\n    try {\n      subscriber.onWorkScheduled(interactions, threadID);\n    } catch (error) {\n      if (!didCatchError) {\n        didCatchError = true;\n        caughtError = error;\n      }\n    }\n  });\n\n  if (didCatchError) {\n    throw caughtError;\n  }\n}\n\nfunction onWorkStarted(interactions, threadID) {\n  var didCatchError = false;\n  var caughtError = null;\n  subscribers.forEach(function (subscriber) {\n    try {\n      subscriber.onWorkStarted(interactions, threadID);\n    } catch (error) {\n      if (!didCatchError) {\n        didCatchError = true;\n        caughtError = error;\n      }\n    }\n  });\n\n  if (didCatchError) {\n    throw caughtError;\n  }\n}\n\nfunction onWorkStopped(interactions, threadID) {\n  var didCatchError = false;\n  var caughtError = null;\n  subscribers.forEach(function (subscriber) {\n    try {\n      subscriber.onWorkStopped(interactions, threadID);\n    } catch (error) {\n      if (!didCatchError) {\n        didCatchError = true;\n        caughtError = error;\n      }\n    }\n  });\n\n  if (didCatchError) {\n    throw caughtError;\n  }\n}\n\nfunction onWorkCanceled(interactions, threadID) {\n  var didCatchError = false;\n  var caughtError = null;\n  subscribers.forEach(function (subscriber) {\n    try {\n      subscriber.onWorkCanceled(interactions, threadID);\n    } catch (error) {\n      if (!didCatchError) {\n        didCatchError = true;\n        caughtError = error;\n      }\n    }\n  });\n\n  if (didCatchError) {\n    throw caughtError;\n  }\n}\n\nexports.unstable_clear = unstable_clear;\nexports.unstable_getCurrent = unstable_getCurrent;\nexports.unstable_getThreadID = unstable_getThreadID;\nexports.unstable_subscribe = unstable_subscribe;\nexports.unstable_trace = unstable_trace;\nexports.unstable_unsubscribe = unstable_unsubscribe;\nexports.unstable_wrap = unstable_wrap;\n  })();\n}\n","/** @license React v0.20.2\n * scheduler.development.js\n *\n * Copyright (c) Facebook, Inc. and its affiliates.\n *\n * This source code is licensed under the MIT license found in the\n * LICENSE file in the root directory of this source tree.\n */\n\n'use strict';\n\nif (process.env.NODE_ENV !== \"production\") {\n  (function() {\n'use strict';\n\nvar enableSchedulerDebugging = false;\nvar enableProfiling = false;\n\nvar requestHostCallback;\nvar requestHostTimeout;\nvar cancelHostTimeout;\nvar requestPaint;\nvar hasPerformanceNow = typeof performance === 'object' && typeof performance.now === 'function';\n\nif (hasPerformanceNow) {\n  var localPerformance = performance;\n\n  exports.unstable_now = function () {\n    return localPerformance.now();\n  };\n} else {\n  var localDate = Date;\n  var initialTime = localDate.now();\n\n  exports.unstable_now = function () {\n    return localDate.now() - initialTime;\n  };\n}\n\nif ( // If Scheduler runs in a non-DOM environment, it falls back to a naive\n// implementation using setTimeout.\ntypeof window === 'undefined' || // Check if MessageChannel is supported, too.\ntypeof MessageChannel !== 'function') {\n  // If this accidentally gets imported in a non-browser environment, e.g. JavaScriptCore,\n  // fallback to a naive implementation.\n  var _callback = null;\n  var _timeoutID = null;\n\n  var _flushCallback = function () {\n    if (_callback !== null) {\n      try {\n        var currentTime = exports.unstable_now();\n        var hasRemainingTime = true;\n\n        _callback(hasRemainingTime, currentTime);\n\n        _callback = null;\n      } catch (e) {\n        setTimeout(_flushCallback, 0);\n        throw e;\n      }\n    }\n  };\n\n  requestHostCallback = function (cb) {\n    if (_callback !== null) {\n      // Protect against re-entrancy.\n      setTimeout(requestHostCallback, 0, cb);\n    } else {\n      _callback = cb;\n      setTimeout(_flushCallback, 0);\n    }\n  };\n\n  requestHostTimeout = function (cb, ms) {\n    _timeoutID = setTimeout(cb, ms);\n  };\n\n  cancelHostTimeout = function () {\n    clearTimeout(_timeoutID);\n  };\n\n  exports.unstable_shouldYield = function () {\n    return false;\n  };\n\n  requestPaint = exports.unstable_forceFrameRate = function () {};\n} else {\n  // Capture local references to native APIs, in case a polyfill overrides them.\n  var _setTimeout = window.setTimeout;\n  var _clearTimeout = window.clearTimeout;\n\n  if (typeof console !== 'undefined') {\n    // TODO: Scheduler no longer requires these methods to be polyfilled. But\n    // maybe we want to continue warning if they don't exist, to preserve the\n    // option to rely on it in the future?\n    var requestAnimationFrame = window.requestAnimationFrame;\n    var cancelAnimationFrame = window.cancelAnimationFrame;\n\n    if (typeof requestAnimationFrame !== 'function') {\n      // Using console['error'] to evade Babel and ESLint\n      console['error'](\"This browser doesn't support requestAnimationFrame. \" + 'Make sure that you load a ' + 'polyfill in older browsers. https://reactjs.org/link/react-polyfills');\n    }\n\n    if (typeof cancelAnimationFrame !== 'function') {\n      // Using console['error'] to evade Babel and ESLint\n      console['error'](\"This browser doesn't support cancelAnimationFrame. \" + 'Make sure that you load a ' + 'polyfill in older browsers. https://reactjs.org/link/react-polyfills');\n    }\n  }\n\n  var isMessageLoopRunning = false;\n  var scheduledHostCallback = null;\n  var taskTimeoutID = -1; // Scheduler periodically yields in case there is other work on the main\n  // thread, like user events. By default, it yields multiple times per frame.\n  // It does not attempt to align with frame boundaries, since most tasks don't\n  // need to be frame aligned; for those that do, use requestAnimationFrame.\n\n  var yieldInterval = 5;\n  var deadline = 0; // TODO: Make this configurable\n\n  {\n    // `isInputPending` is not available. Since we have no way of knowing if\n    // there's pending input, always yield at the end of the frame.\n    exports.unstable_shouldYield = function () {\n      return exports.unstable_now() >= deadline;\n    }; // Since we yield every frame regardless, `requestPaint` has no effect.\n\n\n    requestPaint = function () {};\n  }\n\n  exports.unstable_forceFrameRate = function (fps) {\n    if (fps < 0 || fps > 125) {\n      // Using console['error'] to evade Babel and ESLint\n      console['error']('forceFrameRate takes a positive int between 0 and 125, ' + 'forcing frame rates higher than 125 fps is not supported');\n      return;\n    }\n\n    if (fps > 0) {\n      yieldInterval = Math.floor(1000 / fps);\n    } else {\n      // reset the framerate\n      yieldInterval = 5;\n    }\n  };\n\n  var performWorkUntilDeadline = function () {\n    if (scheduledHostCallback !== null) {\n      var currentTime = exports.unstable_now(); // Yield after `yieldInterval` ms, regardless of where we are in the vsync\n      // cycle. This means there's always time remaining at the beginning of\n      // the message event.\n\n      deadline = currentTime + yieldInterval;\n      var hasTimeRemaining = true;\n\n      try {\n        var hasMoreWork = scheduledHostCallback(hasTimeRemaining, currentTime);\n\n        if (!hasMoreWork) {\n          isMessageLoopRunning = false;\n          scheduledHostCallback = null;\n        } else {\n          // If there's more work, schedule the next message event at the end\n          // of the preceding one.\n          port.postMessage(null);\n        }\n      } catch (error) {\n        // If a scheduler task throws, exit the current browser task so the\n        // error can be observed.\n        port.postMessage(null);\n        throw error;\n      }\n    } else {\n      isMessageLoopRunning = false;\n    } // Yielding to the browser will give it a chance to paint, so we can\n  };\n\n  var channel = new MessageChannel();\n  var port = channel.port2;\n  channel.port1.onmessage = performWorkUntilDeadline;\n\n  requestHostCallback = function (callback) {\n    scheduledHostCallback = callback;\n\n    if (!isMessageLoopRunning) {\n      isMessageLoopRunning = true;\n      port.postMessage(null);\n    }\n  };\n\n  requestHostTimeout = function (callback, ms) {\n    taskTimeoutID = _setTimeout(function () {\n      callback(exports.unstable_now());\n    }, ms);\n  };\n\n  cancelHostTimeout = function () {\n    _clearTimeout(taskTimeoutID);\n\n    taskTimeoutID = -1;\n  };\n}\n\nfunction push(heap, node) {\n  var index = heap.length;\n  heap.push(node);\n  siftUp(heap, node, index);\n}\nfunction peek(heap) {\n  var first = heap[0];\n  return first === undefined ? null : first;\n}\nfunction pop(heap) {\n  var first = heap[0];\n\n  if (first !== undefined) {\n    var last = heap.pop();\n\n    if (last !== first) {\n      heap[0] = last;\n      siftDown(heap, last, 0);\n    }\n\n    return first;\n  } else {\n    return null;\n  }\n}\n\nfunction siftUp(heap, node, i) {\n  var index = i;\n\n  while (true) {\n    var parentIndex = index - 1 >>> 1;\n    var parent = heap[parentIndex];\n\n    if (parent !== undefined && compare(parent, node) > 0) {\n      // The parent is larger. Swap positions.\n      heap[parentIndex] = node;\n      heap[index] = parent;\n      index = parentIndex;\n    } else {\n      // The parent is smaller. Exit.\n      return;\n    }\n  }\n}\n\nfunction siftDown(heap, node, i) {\n  var index = i;\n  var length = heap.length;\n\n  while (index < length) {\n    var leftIndex = (index + 1) * 2 - 1;\n    var left = heap[leftIndex];\n    var rightIndex = leftIndex + 1;\n    var right = heap[rightIndex]; // If the left or right node is smaller, swap with the smaller of those.\n\n    if (left !== undefined && compare(left, node) < 0) {\n      if (right !== undefined && compare(right, left) < 0) {\n        heap[index] = right;\n        heap[rightIndex] = node;\n        index = rightIndex;\n      } else {\n        heap[index] = left;\n        heap[leftIndex] = node;\n        index = leftIndex;\n      }\n    } else if (right !== undefined && compare(right, node) < 0) {\n      heap[index] = right;\n      heap[rightIndex] = node;\n      index = rightIndex;\n    } else {\n      // Neither child is smaller. Exit.\n      return;\n    }\n  }\n}\n\nfunction compare(a, b) {\n  // Compare sort index first, then task id.\n  var diff = a.sortIndex - b.sortIndex;\n  return diff !== 0 ? diff : a.id - b.id;\n}\n\n// TODO: Use symbols?\nvar ImmediatePriority = 1;\nvar UserBlockingPriority = 2;\nvar NormalPriority = 3;\nvar LowPriority = 4;\nvar IdlePriority = 5;\n\nfunction markTaskErrored(task, ms) {\n}\n\n/* eslint-disable no-var */\n// Math.pow(2, 30) - 1\n// 0b111111111111111111111111111111\n\nvar maxSigned31BitInt = 1073741823; // Times out immediately\n\nvar IMMEDIATE_PRIORITY_TIMEOUT = -1; // Eventually times out\n\nvar USER_BLOCKING_PRIORITY_TIMEOUT = 250;\nvar NORMAL_PRIORITY_TIMEOUT = 5000;\nvar LOW_PRIORITY_TIMEOUT = 10000; // Never times out\n\nvar IDLE_PRIORITY_TIMEOUT = maxSigned31BitInt; // Tasks are stored on a min heap\n\nvar taskQueue = [];\nvar timerQueue = []; // Incrementing id counter. Used to maintain insertion order.\n\nvar taskIdCounter = 1; // Pausing the scheduler is useful for debugging.\nvar currentTask = null;\nvar currentPriorityLevel = NormalPriority; // This is set while performing work, to prevent re-entrancy.\n\nvar isPerformingWork = false;\nvar isHostCallbackScheduled = false;\nvar isHostTimeoutScheduled = false;\n\nfunction advanceTimers(currentTime) {\n  // Check for tasks that are no longer delayed and add them to the queue.\n  var timer = peek(timerQueue);\n\n  while (timer !== null) {\n    if (timer.callback === null) {\n      // Timer was cancelled.\n      pop(timerQueue);\n    } else if (timer.startTime <= currentTime) {\n      // Timer fired. Transfer to the task queue.\n      pop(timerQueue);\n      timer.sortIndex = timer.expirationTime;\n      push(taskQueue, timer);\n    } else {\n      // Remaining timers are pending.\n      return;\n    }\n\n    timer = peek(timerQueue);\n  }\n}\n\nfunction handleTimeout(currentTime) {\n  isHostTimeoutScheduled = false;\n  advanceTimers(currentTime);\n\n  if (!isHostCallbackScheduled) {\n    if (peek(taskQueue) !== null) {\n      isHostCallbackScheduled = true;\n      requestHostCallback(flushWork);\n    } else {\n      var firstTimer = peek(timerQueue);\n\n      if (firstTimer !== null) {\n        requestHostTimeout(handleTimeout, firstTimer.startTime - currentTime);\n      }\n    }\n  }\n}\n\nfunction flushWork(hasTimeRemaining, initialTime) {\n\n\n  isHostCallbackScheduled = false;\n\n  if (isHostTimeoutScheduled) {\n    // We scheduled a timeout but it's no longer needed. Cancel it.\n    isHostTimeoutScheduled = false;\n    cancelHostTimeout();\n  }\n\n  isPerformingWork = true;\n  var previousPriorityLevel = currentPriorityLevel;\n\n  try {\n    if (enableProfiling) {\n      try {\n        return workLoop(hasTimeRemaining, initialTime);\n      } catch (error) {\n        if (currentTask !== null) {\n          var currentTime = exports.unstable_now();\n          markTaskErrored(currentTask, currentTime);\n          currentTask.isQueued = false;\n        }\n\n        throw error;\n      }\n    } else {\n      // No catch in prod code path.\n      return workLoop(hasTimeRemaining, initialTime);\n    }\n  } finally {\n    currentTask = null;\n    currentPriorityLevel = previousPriorityLevel;\n    isPerformingWork = false;\n  }\n}\n\nfunction workLoop(hasTimeRemaining, initialTime) {\n  var currentTime = initialTime;\n  advanceTimers(currentTime);\n  currentTask = peek(taskQueue);\n\n  while (currentTask !== null && !(enableSchedulerDebugging )) {\n    if (currentTask.expirationTime > currentTime && (!hasTimeRemaining || exports.unstable_shouldYield())) {\n      // This currentTask hasn't expired, and we've reached the deadline.\n      break;\n    }\n\n    var callback = currentTask.callback;\n\n    if (typeof callback === 'function') {\n      currentTask.callback = null;\n      currentPriorityLevel = currentTask.priorityLevel;\n      var didUserCallbackTimeout = currentTask.expirationTime <= currentTime;\n\n      var continuationCallback = callback(didUserCallbackTimeout);\n      currentTime = exports.unstable_now();\n\n      if (typeof continuationCallback === 'function') {\n        currentTask.callback = continuationCallback;\n      } else {\n\n        if (currentTask === peek(taskQueue)) {\n          pop(taskQueue);\n        }\n      }\n\n      advanceTimers(currentTime);\n    } else {\n      pop(taskQueue);\n    }\n\n    currentTask = peek(taskQueue);\n  } // Return whether there's additional work\n\n\n  if (currentTask !== null) {\n    return true;\n  } else {\n    var firstTimer = peek(timerQueue);\n\n    if (firstTimer !== null) {\n      requestHostTimeout(handleTimeout, firstTimer.startTime - currentTime);\n    }\n\n    return false;\n  }\n}\n\nfunction unstable_runWithPriority(priorityLevel, eventHandler) {\n  switch (priorityLevel) {\n    case ImmediatePriority:\n    case UserBlockingPriority:\n    case NormalPriority:\n    case LowPriority:\n    case IdlePriority:\n      break;\n\n    default:\n      priorityLevel = NormalPriority;\n  }\n\n  var previousPriorityLevel = currentPriorityLevel;\n  currentPriorityLevel = priorityLevel;\n\n  try {\n    return eventHandler();\n  } finally {\n    currentPriorityLevel = previousPriorityLevel;\n  }\n}\n\nfunction unstable_next(eventHandler) {\n  var priorityLevel;\n\n  switch (currentPriorityLevel) {\n    case ImmediatePriority:\n    case UserBlockingPriority:\n    case NormalPriority:\n      // Shift down to normal priority\n      priorityLevel = NormalPriority;\n      break;\n\n    default:\n      // Anything lower than normal priority should remain at the current level.\n      priorityLevel = currentPriorityLevel;\n      break;\n  }\n\n  var previousPriorityLevel = currentPriorityLevel;\n  currentPriorityLevel = priorityLevel;\n\n  try {\n    return eventHandler();\n  } finally {\n    currentPriorityLevel = previousPriorityLevel;\n  }\n}\n\nfunction unstable_wrapCallback(callback) {\n  var parentPriorityLevel = currentPriorityLevel;\n  return function () {\n    // This is a fork of runWithPriority, inlined for performance.\n    var previousPriorityLevel = currentPriorityLevel;\n    currentPriorityLevel = parentPriorityLevel;\n\n    try {\n      return callback.apply(this, arguments);\n    } finally {\n      currentPriorityLevel = previousPriorityLevel;\n    }\n  };\n}\n\nfunction unstable_scheduleCallback(priorityLevel, callback, options) {\n  var currentTime = exports.unstable_now();\n  var startTime;\n\n  if (typeof options === 'object' && options !== null) {\n    var delay = options.delay;\n\n    if (typeof delay === 'number' && delay > 0) {\n      startTime = currentTime + delay;\n    } else {\n      startTime = currentTime;\n    }\n  } else {\n    startTime = currentTime;\n  }\n\n  var timeout;\n\n  switch (priorityLevel) {\n    case ImmediatePriority:\n      timeout = IMMEDIATE_PRIORITY_TIMEOUT;\n      break;\n\n    case UserBlockingPriority:\n      timeout = USER_BLOCKING_PRIORITY_TIMEOUT;\n      break;\n\n    case IdlePriority:\n      timeout = IDLE_PRIORITY_TIMEOUT;\n      break;\n\n    case LowPriority:\n      timeout = LOW_PRIORITY_TIMEOUT;\n      break;\n\n    case NormalPriority:\n    default:\n      timeout = NORMAL_PRIORITY_TIMEOUT;\n      break;\n  }\n\n  var expirationTime = startTime + timeout;\n  var newTask = {\n    id: taskIdCounter++,\n    callback: callback,\n    priorityLevel: priorityLevel,\n    startTime: startTime,\n    expirationTime: expirationTime,\n    sortIndex: -1\n  };\n\n  if (startTime > currentTime) {\n    // This is a delayed task.\n    newTask.sortIndex = startTime;\n    push(timerQueue, newTask);\n\n    if (peek(taskQueue) === null && newTask === peek(timerQueue)) {\n      // All tasks are delayed, and this is the task with the earliest delay.\n      if (isHostTimeoutScheduled) {\n        // Cancel an existing timeout.\n        cancelHostTimeout();\n      } else {\n        isHostTimeoutScheduled = true;\n      } // Schedule a timeout.\n\n\n      requestHostTimeout(handleTimeout, startTime - currentTime);\n    }\n  } else {\n    newTask.sortIndex = expirationTime;\n    push(taskQueue, newTask);\n    // wait until the next time we yield.\n\n\n    if (!isHostCallbackScheduled && !isPerformingWork) {\n      isHostCallbackScheduled = true;\n      requestHostCallback(flushWork);\n    }\n  }\n\n  return newTask;\n}\n\nfunction unstable_pauseExecution() {\n}\n\nfunction unstable_continueExecution() {\n\n  if (!isHostCallbackScheduled && !isPerformingWork) {\n    isHostCallbackScheduled = true;\n    requestHostCallback(flushWork);\n  }\n}\n\nfunction unstable_getFirstCallbackNode() {\n  return peek(taskQueue);\n}\n\nfunction unstable_cancelCallback(task) {\n  // remove from the queue because you can't remove arbitrary nodes from an\n  // array based heap, only the first one.)\n\n\n  task.callback = null;\n}\n\nfunction unstable_getCurrentPriorityLevel() {\n  return currentPriorityLevel;\n}\n\nvar unstable_requestPaint = requestPaint;\nvar unstable_Profiling =  null;\n\nexports.unstable_IdlePriority = IdlePriority;\nexports.unstable_ImmediatePriority = ImmediatePriority;\nexports.unstable_LowPriority = LowPriority;\nexports.unstable_NormalPriority = NormalPriority;\nexports.unstable_Profiling = unstable_Profiling;\nexports.unstable_UserBlockingPriority = UserBlockingPriority;\nexports.unstable_cancelCallback = unstable_cancelCallback;\nexports.unstable_continueExecution = unstable_continueExecution;\nexports.unstable_getCurrentPriorityLevel = unstable_getCurrentPriorityLevel;\nexports.unstable_getFirstCallbackNode = unstable_getFirstCallbackNode;\nexports.unstable_next = unstable_next;\nexports.unstable_pauseExecution = unstable_pauseExecution;\nexports.unstable_requestPaint = unstable_requestPaint;\nexports.unstable_runWithPriority = unstable_runWithPriority;\nexports.unstable_scheduleCallback = unstable_scheduleCallback;\nexports.unstable_wrapCallback = unstable_wrapCallback;\n  })();\n}\n","'use strict';\n\nif (process.env.NODE_ENV === 'production') {\n  module.exports = require('./cjs/scheduler.production.min.js');\n} else {\n  module.exports = require('./cjs/scheduler.development.js');\n}\n","'use strict';\n\nif (process.env.NODE_ENV === 'production') {\n  module.exports = require('./cjs/scheduler-tracing.production.min.js');\n} else {\n  module.exports = require('./cjs/scheduler-tracing.development.js');\n}\n","/**\n * Copyright (c) 2014-present, Facebook, Inc.\n *\n * This source code is licensed under the MIT license found in the\n * LICENSE file in the root directory of this source tree.\n */\n\n'use strict';\n\n/**\n * Similar to invariant but only logs a warning if the condition is not met.\n * This can be used to log issues in development environments in critical\n * paths. Removing the logging code for production environments will keep the\n * same logic and follow the same code paths.\n */\n\nvar __DEV__ = process.env.NODE_ENV !== 'production';\n\nvar warning = function() {};\n\nif (__DEV__) {\n  var printWarning = function printWarning(format, args) {\n    var len = arguments.length;\n    args = new Array(len > 1 ? len - 1 : 0);\n    for (var key = 1; key < len; key++) {\n      args[key - 1] = arguments[key];\n    }\n    var argIndex = 0;\n    var message = 'Warning: ' +\n      format.replace(/%s/g, function() {\n        return args[argIndex++];\n      });\n    if (typeof console !== 'undefined') {\n      console.error(message);\n    }\n    try {\n      // --- Welcome to debugging React ---\n      // This error was thrown as a convenience so that you can use this stack\n      // to find the callsite that caused this warning to fire.\n      throw new Error(message);\n    } catch (x) {}\n  }\n\n  warning = function(condition, format, args) {\n    var len = arguments.length;\n    args = new Array(len > 2 ? len - 2 : 0);\n    for (var key = 2; key < len; key++) {\n      args[key - 2] = arguments[key];\n    }\n    if (format === undefined) {\n      throw new Error(\n          '`warning(condition, format, ...args)` requires a warning ' +\n          'message argument'\n      );\n    }\n    if (!condition) {\n      printWarning.apply(null, [format].concat(args));\n    }\n  };\n}\n\nmodule.exports = warning;\n","/**\n * what-input - A global utility for tracking the current input method (mouse, keyboard or touch).\n * @version v5.2.12\n * @link https://github.com/ten1seven/what-input\n * @license MIT\n */\n(function webpackUniversalModuleDefinition(root, factory) {\n\tif(typeof exports === 'object' && typeof module === 'object')\n\t\tmodule.exports = factory();\n\telse if(typeof define === 'function' && define.amd)\n\t\tdefine(\"whatInput\", [], factory);\n\telse if(typeof exports === 'object')\n\t\texports[\"whatInput\"] = factory();\n\telse\n\t\troot[\"whatInput\"] = factory();\n})(this, function() {\nreturn /******/ (function(modules) { // webpackBootstrap\n/******/ \t// The module cache\n/******/ \tvar installedModules = {};\n\n/******/ \t// The require function\n/******/ \tfunction __webpack_require__(moduleId) {\n\n/******/ \t\t// Check if module is in cache\n/******/ \t\tif(installedModules[moduleId])\n/******/ \t\t\treturn installedModules[moduleId].exports;\n\n/******/ \t\t// Create a new module (and put it into the cache)\n/******/ \t\tvar module = installedModules[moduleId] = {\n/******/ \t\t\texports: {},\n/******/ \t\t\tid: moduleId,\n/******/ \t\t\tloaded: false\n/******/ \t\t};\n\n/******/ \t\t// Execute the module function\n/******/ \t\tmodules[moduleId].call(module.exports, module, module.exports, __webpack_require__);\n\n/******/ \t\t// Flag the module as loaded\n/******/ \t\tmodule.loaded = true;\n\n/******/ \t\t// Return the exports of the module\n/******/ \t\treturn module.exports;\n/******/ \t}\n\n\n/******/ \t// expose the modules object (__webpack_modules__)\n/******/ \t__webpack_require__.m = modules;\n\n/******/ \t// expose the module cache\n/******/ \t__webpack_require__.c = installedModules;\n\n/******/ \t// __webpack_public_path__\n/******/ \t__webpack_require__.p = \"\";\n\n/******/ \t// Load entry module and return exports\n/******/ \treturn __webpack_require__(0);\n/******/ })\n/************************************************************************/\n/******/ ([\n/* 0 */\n/***/ (function(module, exports) {\n\n\t'use strict';\n\n\tmodule.exports = function () {\n\t  /*\n\t   * bail out if there is no document or window\n\t   * (i.e. in a node/non-DOM environment)\n\t   *\n\t   * Return a stubbed API instead\n\t   */\n\t  if (typeof document === 'undefined' || typeof window === 'undefined') {\n\t    return {\n\t      // always return \"initial\" because no interaction will ever be detected\n\t      ask: function ask() {\n\t        return 'initial';\n\t      },\n\n\t      // always return null\n\t      element: function element() {\n\t        return null;\n\t      },\n\n\t      // no-op\n\t      ignoreKeys: function ignoreKeys() {},\n\n\t      // no-op\n\t      specificKeys: function specificKeys() {},\n\n\t      // no-op\n\t      registerOnChange: function registerOnChange() {},\n\n\t      // no-op\n\t      unRegisterOnChange: function unRegisterOnChange() {}\n\t    };\n\t  }\n\n\t  /*\n\t   * variables\n\t   */\n\n\t  // cache document.documentElement\n\t  var docElem = document.documentElement;\n\n\t  // currently focused dom element\n\t  var currentElement = null;\n\n\t  // last used input type\n\t  var currentInput = 'initial';\n\n\t  // last used input intent\n\t  var currentIntent = currentInput;\n\n\t  // UNIX timestamp of current event\n\t  var currentTimestamp = Date.now();\n\n\t  // check for a `data-whatpersist` attribute on either the `html` or `body` elements, defaults to `true`\n\t  var shouldPersist = false;\n\n\t  // form input types\n\t  var formInputs = ['button', 'input', 'select', 'textarea'];\n\n\t  // empty array for holding callback functions\n\t  var functionList = [];\n\n\t  // list of modifier keys commonly used with the mouse and\n\t  // can be safely ignored to prevent false keyboard detection\n\t  var ignoreMap = [16, // shift\n\t  17, // control\n\t  18, // alt\n\t  91, // Windows key / left Apple cmd\n\t  93 // Windows menu / right Apple cmd\n\t  ];\n\n\t  var specificMap = [];\n\n\t  // mapping of events to input types\n\t  var inputMap = {\n\t    keydown: 'keyboard',\n\t    keyup: 'keyboard',\n\t    mousedown: 'mouse',\n\t    mousemove: 'mouse',\n\t    MSPointerDown: 'pointer',\n\t    MSPointerMove: 'pointer',\n\t    pointerdown: 'pointer',\n\t    pointermove: 'pointer',\n\t    touchstart: 'touch',\n\t    touchend: 'touch'\n\n\t    // boolean: true if the page is being scrolled\n\t  };var isScrolling = false;\n\n\t  // store current mouse position\n\t  var mousePos = {\n\t    x: null,\n\t    y: null\n\n\t    // map of IE 10 pointer events\n\t  };var pointerMap = {\n\t    2: 'touch',\n\t    3: 'touch', // treat pen like touch\n\t    4: 'mouse'\n\n\t    // check support for passive event listeners\n\t  };var supportsPassive = false;\n\n\t  try {\n\t    var opts = Object.defineProperty({}, 'passive', {\n\t      get: function get() {\n\t        supportsPassive = true;\n\t      }\n\t    });\n\n\t    window.addEventListener('test', null, opts);\n\t  } catch (e) {}\n\t  // fail silently\n\n\n\t  /*\n\t   * set up\n\t   */\n\n\t  var setUp = function setUp() {\n\t    // add correct mouse wheel event mapping to `inputMap`\n\t    inputMap[detectWheel()] = 'mouse';\n\n\t    addListeners();\n\t  };\n\n\t  /*\n\t   * events\n\t   */\n\n\t  var addListeners = function addListeners() {\n\t    // `pointermove`, `MSPointerMove`, `mousemove` and mouse wheel event binding\n\t    // can only demonstrate potential, but not actual, interaction\n\t    // and are treated separately\n\t    var options = supportsPassive ? { passive: true, capture: true } : true;\n\n\t    document.addEventListener('DOMContentLoaded', setPersist, true);\n\n\t    // pointer events (mouse, pen, touch)\n\t    if (window.PointerEvent) {\n\t      window.addEventListener('pointerdown', setInput, true);\n\t      window.addEventListener('pointermove', setIntent, true);\n\t    } else if (window.MSPointerEvent) {\n\t      window.addEventListener('MSPointerDown', setInput, true);\n\t      window.addEventListener('MSPointerMove', setIntent, true);\n\t    } else {\n\t      // mouse events\n\t      window.addEventListener('mousedown', setInput, true);\n\t      window.addEventListener('mousemove', setIntent, true);\n\n\t      // touch events\n\t      if ('ontouchstart' in window) {\n\t        window.addEventListener('touchstart', setInput, options);\n\t        window.addEventListener('touchend', setInput, true);\n\t      }\n\t    }\n\n\t    // mouse wheel\n\t    window.addEventListener(detectWheel(), setIntent, options);\n\n\t    // keyboard events\n\t    window.addEventListener('keydown', setInput, true);\n\t    window.addEventListener('keyup', setInput, true);\n\n\t    // focus events\n\t    window.addEventListener('focusin', setElement, true);\n\t    window.addEventListener('focusout', clearElement, true);\n\t  };\n\n\t  // checks if input persistence should happen and\n\t  // get saved state from session storage if true (defaults to `false`)\n\t  var setPersist = function setPersist() {\n\t    shouldPersist = !(docElem.getAttribute('data-whatpersist') === 'false' || document.body.getAttribute('data-whatpersist') === 'false');\n\n\t    if (shouldPersist) {\n\t      // check for session variables and use if available\n\t      try {\n\t        if (window.sessionStorage.getItem('what-input')) {\n\t          currentInput = window.sessionStorage.getItem('what-input');\n\t        }\n\n\t        if (window.sessionStorage.getItem('what-intent')) {\n\t          currentIntent = window.sessionStorage.getItem('what-intent');\n\t        }\n\t      } catch (e) {\n\t        // fail silently\n\t      }\n\t    }\n\n\t    // always run these so at least `initial` state is set\n\t    doUpdate('input');\n\t    doUpdate('intent');\n\t  };\n\n\t  // checks conditions before updating new input\n\t  var setInput = function setInput(event) {\n\t    var eventKey = event.which;\n\t    var value = inputMap[event.type];\n\n\t    if (value === 'pointer') {\n\t      value = pointerType(event);\n\t    }\n\n\t    var ignoreMatch = !specificMap.length && ignoreMap.indexOf(eventKey) === -1;\n\n\t    var specificMatch = specificMap.length && specificMap.indexOf(eventKey) !== -1;\n\n\t    var shouldUpdate = value === 'keyboard' && eventKey && (ignoreMatch || specificMatch) || value === 'mouse' || value === 'touch';\n\n\t    // prevent touch detection from being overridden by event execution order\n\t    if (validateTouch(value)) {\n\t      shouldUpdate = false;\n\t    }\n\n\t    if (shouldUpdate && currentInput !== value) {\n\t      currentInput = value;\n\n\t      persistInput('input', currentInput);\n\t      doUpdate('input');\n\t    }\n\n\t    if (shouldUpdate && currentIntent !== value) {\n\t      // preserve intent for keyboard interaction with form fields\n\t      var activeElem = document.activeElement;\n\t      var notFormInput = activeElem && activeElem.nodeName && (formInputs.indexOf(activeElem.nodeName.toLowerCase()) === -1 || activeElem.nodeName.toLowerCase() === 'button' && !checkClosest(activeElem, 'form'));\n\n\t      if (notFormInput) {\n\t        currentIntent = value;\n\n\t        persistInput('intent', currentIntent);\n\t        doUpdate('intent');\n\t      }\n\t    }\n\t  };\n\n\t  // updates the doc and `inputTypes` array with new input\n\t  var doUpdate = function doUpdate(which) {\n\t    docElem.setAttribute('data-what' + which, which === 'input' ? currentInput : currentIntent);\n\n\t    fireFunctions(which);\n\t  };\n\n\t  // updates input intent for `mousemove` and `pointermove`\n\t  var setIntent = function setIntent(event) {\n\t    var value = inputMap[event.type];\n\n\t    if (value === 'pointer') {\n\t      value = pointerType(event);\n\t    }\n\n\t    // test to see if `mousemove` happened relative to the screen to detect scrolling versus mousemove\n\t    detectScrolling(event);\n\n\t    // only execute if scrolling isn't happening\n\t    if ((!isScrolling && !validateTouch(value) || isScrolling && event.type === 'wheel' || event.type === 'mousewheel' || event.type === 'DOMMouseScroll') && currentIntent !== value) {\n\t      currentIntent = value;\n\n\t      persistInput('intent', currentIntent);\n\t      doUpdate('intent');\n\t    }\n\t  };\n\n\t  var setElement = function setElement(event) {\n\t    if (!event.target.nodeName) {\n\t      // If nodeName is undefined, clear the element\n\t      // This can happen if click inside an <svg> element.\n\t      clearElement();\n\t      return;\n\t    }\n\n\t    currentElement = event.target.nodeName.toLowerCase();\n\t    docElem.setAttribute('data-whatelement', currentElement);\n\n\t    if (event.target.classList && event.target.classList.length) {\n\t      docElem.setAttribute('data-whatclasses', event.target.classList.toString().replace(' ', ','));\n\t    }\n\t  };\n\n\t  var clearElement = function clearElement() {\n\t    currentElement = null;\n\n\t    docElem.removeAttribute('data-whatelement');\n\t    docElem.removeAttribute('data-whatclasses');\n\t  };\n\n\t  var persistInput = function persistInput(which, value) {\n\t    if (shouldPersist) {\n\t      try {\n\t        window.sessionStorage.setItem('what-' + which, value);\n\t      } catch (e) {\n\t        // fail silently\n\t      }\n\t    }\n\t  };\n\n\t  /*\n\t   * utilities\n\t   */\n\n\t  var pointerType = function pointerType(event) {\n\t    if (typeof event.pointerType === 'number') {\n\t      return pointerMap[event.pointerType];\n\t    } else {\n\t      // treat pen like touch\n\t      return event.pointerType === 'pen' ? 'touch' : event.pointerType;\n\t    }\n\t  };\n\n\t  // prevent touch detection from being overridden by event execution order\n\t  var validateTouch = function validateTouch(value) {\n\t    var timestamp = Date.now();\n\n\t    var touchIsValid = value === 'mouse' && currentInput === 'touch' && timestamp - currentTimestamp < 200;\n\n\t    currentTimestamp = timestamp;\n\n\t    return touchIsValid;\n\t  };\n\n\t  // detect version of mouse wheel event to use\n\t  // via https://developer.mozilla.org/en-US/docs/Web/API/Element/wheel_event\n\t  var detectWheel = function detectWheel() {\n\t    var wheelType = null;\n\n\t    // Modern browsers support \"wheel\"\n\t    if ('onwheel' in document.createElement('div')) {\n\t      wheelType = 'wheel';\n\t    } else {\n\t      // Webkit and IE support at least \"mousewheel\"\n\t      // or assume that remaining browsers are older Firefox\n\t      wheelType = document.onmousewheel !== undefined ? 'mousewheel' : 'DOMMouseScroll';\n\t    }\n\n\t    return wheelType;\n\t  };\n\n\t  // runs callback functions\n\t  var fireFunctions = function fireFunctions(type) {\n\t    for (var i = 0, len = functionList.length; i < len; i++) {\n\t      if (functionList[i].type === type) {\n\t        functionList[i].fn.call(undefined, type === 'input' ? currentInput : currentIntent);\n\t      }\n\t    }\n\t  };\n\n\t  // finds matching element in an object\n\t  var objPos = function objPos(match) {\n\t    for (var i = 0, len = functionList.length; i < len; i++) {\n\t      if (functionList[i].fn === match) {\n\t        return i;\n\t      }\n\t    }\n\t  };\n\n\t  var detectScrolling = function detectScrolling(event) {\n\t    if (mousePos.x !== event.screenX || mousePos.y !== event.screenY) {\n\t      isScrolling = false;\n\n\t      mousePos.x = event.screenX;\n\t      mousePos.y = event.screenY;\n\t    } else {\n\t      isScrolling = true;\n\t    }\n\t  };\n\n\t  // manual version of `closest()`\n\t  var checkClosest = function checkClosest(elem, tag) {\n\t    var ElementPrototype = window.Element.prototype;\n\n\t    if (!ElementPrototype.matches) {\n\t      ElementPrototype.matches = ElementPrototype.msMatchesSelector || ElementPrototype.webkitMatchesSelector;\n\t    }\n\n\t    if (!ElementPrototype.closest) {\n\t      do {\n\t        if (elem.matches(tag)) {\n\t          return elem;\n\t        }\n\n\t        elem = elem.parentElement || elem.parentNode;\n\t      } while (elem !== null && elem.nodeType === 1);\n\n\t      return null;\n\t    } else {\n\t      return elem.closest(tag);\n\t    }\n\t  };\n\n\t  /*\n\t   * init\n\t   */\n\n\t  // don't start script unless browser cuts the mustard\n\t  // (also passes if polyfills are used)\n\t  if ('addEventListener' in window && Array.prototype.indexOf) {\n\t    setUp();\n\t  }\n\n\t  /*\n\t   * api\n\t   */\n\n\t  return {\n\t    // returns string: the current input type\n\t    // opt: 'intent'|'input'\n\t    // 'input' (default): returns the same value as the `data-whatinput` attribute\n\t    // 'intent': includes `data-whatintent` value if it's different than `data-whatinput`\n\t    ask: function ask(opt) {\n\t      return opt === 'intent' ? currentIntent : currentInput;\n\t    },\n\n\t    // returns string: the currently focused element or null\n\t    element: function element() {\n\t      return currentElement;\n\t    },\n\n\t    // overwrites ignored keys with provided array\n\t    ignoreKeys: function ignoreKeys(arr) {\n\t      ignoreMap = arr;\n\t    },\n\n\t    // overwrites specific char keys to update on\n\t    specificKeys: function specificKeys(arr) {\n\t      specificMap = arr;\n\t    },\n\n\t    // attach functions to input and intent \"events\"\n\t    // funct: function to fire on change\n\t    // eventType: 'input'|'intent'\n\t    registerOnChange: function registerOnChange(fn, eventType) {\n\t      functionList.push({\n\t        fn: fn,\n\t        type: eventType || 'input'\n\t      });\n\t    },\n\n\t    unRegisterOnChange: function unRegisterOnChange(fn) {\n\t      var position = objPos(fn);\n\n\t      if (position || position === 0) {\n\t        functionList.splice(position, 1);\n\t      }\n\t    },\n\n\t    clearStorage: function clearStorage() {\n\t      window.sessionStorage.clear();\n\t    }\n\t  };\n\t}();\n\n/***/ })\n/******/ ])\n});\n;","module.exports = jQuery;","/*! js-cookie v3.0.5 | MIT */\n/* eslint-disable no-var */\nfunction assign (target) {\n  for (var i = 1; i < arguments.length; i++) {\n    var source = arguments[i];\n    for (var key in source) {\n      target[key] = source[key];\n    }\n  }\n  return target\n}\n/* eslint-enable no-var */\n\n/* eslint-disable no-var */\nvar defaultConverter = {\n  read: function (value) {\n    if (value[0] === '\"') {\n      value = value.slice(1, -1);\n    }\n    return value.replace(/(%[\\dA-F]{2})+/gi, decodeURIComponent)\n  },\n  write: function (value) {\n    return encodeURIComponent(value).replace(\n      /%(2[346BF]|3[AC-F]|40|5[BDE]|60|7[BCD])/g,\n      decodeURIComponent\n    )\n  }\n};\n/* eslint-enable no-var */\n\n/* eslint-disable no-var */\n\nfunction init (converter, defaultAttributes) {\n  function set (name, value, attributes) {\n    if (typeof document === 'undefined') {\n      return\n    }\n\n    attributes = assign({}, defaultAttributes, attributes);\n\n    if (typeof attributes.expires === 'number') {\n      attributes.expires = new Date(Date.now() + attributes.expires * 864e5);\n    }\n    if (attributes.expires) {\n      attributes.expires = attributes.expires.toUTCString();\n    }\n\n    name = encodeURIComponent(name)\n      .replace(/%(2[346B]|5E|60|7C)/g, decodeURIComponent)\n      .replace(/[()]/g, escape);\n\n    var stringifiedAttributes = '';\n    for (var attributeName in attributes) {\n      if (!attributes[attributeName]) {\n        continue\n      }\n\n      stringifiedAttributes += '; ' + attributeName;\n\n      if (attributes[attributeName] === true) {\n        continue\n      }\n\n      // Considers RFC 6265 section 5.2:\n      // ...\n      // 3.  If the remaining unparsed-attributes contains a %x3B (\";\")\n      //     character:\n      // Consume the characters of the unparsed-attributes up to,\n      // not including, the first %x3B (\";\") character.\n      // ...\n      stringifiedAttributes += '=' + attributes[attributeName].split(';')[0];\n    }\n\n    return (document.cookie =\n      name + '=' + converter.write(value, name) + stringifiedAttributes)\n  }\n\n  function get (name) {\n    if (typeof document === 'undefined' || (arguments.length && !name)) {\n      return\n    }\n\n    // To prevent the for loop in the first place assign an empty array\n    // in case there are no cookies at all.\n    var cookies = document.cookie ? document.cookie.split('; ') : [];\n    var jar = {};\n    for (var i = 0; i < cookies.length; i++) {\n      var parts = cookies[i].split('=');\n      var value = parts.slice(1).join('=');\n\n      try {\n        var found = decodeURIComponent(parts[0]);\n        jar[found] = converter.read(value, found);\n\n        if (name === found) {\n          break\n        }\n      } catch (e) {}\n    }\n\n    return name ? jar[name] : jar\n  }\n\n  return Object.create(\n    {\n      set,\n      get,\n      remove: function (name, attributes) {\n        set(\n          name,\n          '',\n          assign({}, attributes, {\n            expires: -1\n          })\n        );\n      },\n      withAttributes: function (attributes) {\n        return init(this.converter, assign({}, this.attributes, attributes))\n      },\n      withConverter: function (converter) {\n        return init(assign({}, this.converter, converter), this.attributes)\n      }\n    },\n    {\n      attributes: { value: Object.freeze(defaultAttributes) },\n      converter: { value: Object.freeze(converter) }\n    }\n  )\n}\n\nvar api = init(defaultConverter, { path: '/' });\n/* eslint-enable no-var */\n\nexport { api as default };\n","// The module cache\nvar __webpack_module_cache__ = {};\n\n// The require function\nfunction __webpack_require__(moduleId) {\n\t// Check if module is in cache\n\tvar cachedModule = __webpack_module_cache__[moduleId];\n\tif (cachedModule !== undefined) {\n\t\treturn cachedModule.exports;\n\t}\n\t// Create a new module (and put it into the cache)\n\tvar module = __webpack_module_cache__[moduleId] = {\n\t\t// no module.id needed\n\t\t// no module.loaded needed\n\t\texports: {}\n\t};\n\n\t// Execute the module function\n\t__webpack_modules__[moduleId].call(module.exports, module, module.exports, __webpack_require__);\n\n\t// Return the exports of the module\n\treturn module.exports;\n}\n\n","// getDefaultExport function for compatibility with non-harmony modules\n__webpack_require__.n = (module) => {\n\tvar getter = module && module.__esModule ?\n\t\t() => (module['default']) :\n\t\t() => (module);\n\t__webpack_require__.d(getter, { a: getter });\n\treturn getter;\n};","// define getter functions for harmony exports\n__webpack_require__.d = (exports, definition) => {\n\tfor(var key in definition) {\n\t\tif(__webpack_require__.o(definition, key) && !__webpack_require__.o(exports, key)) {\n\t\t\tObject.defineProperty(exports, key, { enumerable: true, get: definition[key] });\n\t\t}\n\t}\n};","__webpack_require__.o = (obj, prop) => (Object.prototype.hasOwnProperty.call(obj, prop))","// define __esModule on exports\n__webpack_require__.r = (exports) => {\n\tif(typeof Symbol !== 'undefined' && Symbol.toStringTag) {\n\t\tObject.defineProperty(exports, Symbol.toStringTag, { value: 'Module' });\n\t}\n\tObject.defineProperty(exports, '__esModule', { value: true });\n};","// Detect input method in order to hide outlines in an accessible manner\n// https://github.com/ten1seven/what-input\n// NOTE: Can drop once Safari supports :focus-visible to save 1.7kB (gzip)\n//       https://caniuse.com/css-focus-visible\nimport \"what-input\";\n\n// Emit “font-loaded” event so expandable components know to recalc their height\ndocument.fonts.ready.then(function () {\n  let fontEvent = new CustomEvent(\"fonts-loaded\");\n  document.documentElement.dispatchEvent(fontEvent);\n});\n\nimport \"./modules/accordion\";\nimport \"./modules/art-collection\";\nimport \"./modules/nav\";\nimport \"./modules/link-icons\";\nimport \"./modules/main-nav-submenus\";\nimport \"./modules/tabs\";\nimport \"./modules/search\";\nimport \"./modules/image-viewer\";\nimport \"./modules/scroll-to-animate\";\nimport \"./modules/art-collection-scroll\";\nimport \"./modules/collections-data\";\nimport \"./modules/membership-discount-form\";\nimport \"./modules/site-wide-banner\";\nimport \"./modules/shipping-notice\";\n\n// Scroll back up to page header when paginating with FacetWP\n/* global FWP */\nif (typeof FWP !== 'undefined') {\n  const pageHeading = document.querySelector('#title');\n  if (pageHeading) {\n    document.addEventListener('facetwp-loaded', function() {\n      if (FWP.loaded) {\n        pageHeading.scrollIntoView({ behavior: 'smooth' });\n      }\n    });\n  }\n}\n","// extracted by mini-css-extract-plugin\nexport {};"],"names":["const","let","this","beginYear","endYear"],"sourceRoot":""}