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53 KiB
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'intersection-observer';\nimport 'requestidlecallback';\nimport objectFitImages from 'object-fit-images';\n\nobjectFitImages();\n","import 'intersection-observer';\nimport 'requestidlecallback';\nimport objectFitImages from 'object-fit-images';\n\nobjectFitImages();\n","/**\n * Copyright 2016 Google Inc. All Rights Reserved.\n *\n * Licensed under the W3C SOFTWARE AND DOCUMENT NOTICE AND LICENSE.\n *\n * https://www.w3.org/Consortium/Legal/2015/copyright-software-and-document\n *\n */\n(function (window, document) {\n 'use strict'; // Exits early if all IntersectionObserver and IntersectionObserverEntry\n // features are natively supported.\n\n if ('IntersectionObserver' in window && 'IntersectionObserverEntry' in window && 'intersectionRatio' in window.IntersectionObserverEntry.prototype) {\n // Minimal polyfill for Edge 15's lack of `isIntersecting`\n // See: https://github.com/w3c/IntersectionObserver/issues/211\n if (!('isIntersecting' in window.IntersectionObserverEntry.prototype)) {\n Object.defineProperty(window.IntersectionObserverEntry.prototype, 'isIntersecting', {\n get: function get() {\n return this.intersectionRatio > 0;\n }\n });\n }\n\n return;\n }\n /**\n * An IntersectionObserver registry. This registry exists to hold a strong\n * reference to IntersectionObserver instances currently observing a target\n * element. Without this registry, instances without another reference may be\n * garbage collected.\n */\n\n\n var registry = [];\n /**\n * Creates the global IntersectionObserverEntry constructor.\n * https://w3c.github.io/IntersectionObserver/#intersection-observer-entry\n * @param {Object} entry A dictionary of instance properties.\n * @constructor\n */\n\n function IntersectionObserverEntry(entry) {\n this.time = entry.time;\n this.target = entry.target;\n this.rootBounds = entry.rootBounds;\n this.boundingClientRect = entry.boundingClientRect;\n this.intersectionRect = entry.intersectionRect || getEmptyRect();\n this.isIntersecting = !!entry.intersectionRect; // Calculates the intersection ratio.\n\n var targetRect = this.boundingClientRect;\n var targetArea = targetRect.width * targetRect.height;\n var intersectionRect = this.intersectionRect;\n var intersectionArea = intersectionRect.width * intersectionRect.height; // Sets intersection ratio.\n\n if (targetArea) {\n // Round the intersection ratio to avoid floating point math issues:\n // https://github.com/w3c/IntersectionObserver/issues/324\n this.intersectionRatio = Number((intersectionArea / targetArea).toFixed(4));\n } else {\n // If area is zero and is intersecting, sets to 1, otherwise to 0\n this.intersectionRatio = this.isIntersecting ? 1 : 0;\n }\n }\n /**\n * Creates the global IntersectionObserver constructor.\n * https://w3c.github.io/IntersectionObserver/#intersection-observer-interface\n * @param {Function} callback The function to be invoked after intersection\n * changes have queued. The function is not invoked if the queue has\n * been emptied by calling the `takeRecords` method.\n * @param {Object=} opt_options Optional configuration options.\n * @constructor\n */\n\n\n function IntersectionObserver(callback, opt_options) {\n var options = opt_options || {};\n\n if (typeof callback != 'function') {\n throw new Error('callback must be a function');\n }\n\n if (options.root && options.root.nodeType != 1) {\n throw new Error('root must be an Element');\n } // Binds and throttles `this._checkForIntersections`.\n\n\n this._checkForIntersections = throttle(this._checkForIntersections.bind(this), this.THROTTLE_TIMEOUT); // Private properties.\n\n this._callback = callback;\n this._observationTargets = [];\n this._queuedEntries = [];\n this._rootMarginValues = this._parseRootMargin(options.rootMargin); // Public properties.\n\n this.thresholds = this._initThresholds(options.threshold);\n this.root = options.root || null;\n this.rootMargin = this._rootMarginValues.map(function (margin) {\n return margin.value + margin.unit;\n }).join(' ');\n }\n /**\n * The minimum interval within which the document will be checked for\n * intersection changes.\n */\n\n\n IntersectionObserver.prototype.THROTTLE_TIMEOUT = 100;\n /**\n * The frequency in which the polyfill polls for intersection changes.\n * this can be updated on a per instance basis and must be set prior to\n * calling `observe` on the first target.\n */\n\n IntersectionObserver.prototype.POLL_INTERVAL = null;\n /**\n * Use a mutation observer on the root element\n * to detect intersection changes.\n */\n\n IntersectionObserver.prototype.USE_MUTATION_OBSERVER = true;\n /**\n * Starts observing a target element for intersection changes based on\n * the thresholds values.\n * @param {Element} target The DOM element to observe.\n */\n\n IntersectionObserver.prototype.observe = function (target) {\n var isTargetAlreadyObserved = this._observationTargets.some(function (item) {\n return item.element == target;\n });\n\n if (isTargetAlreadyObserved) {\n return;\n }\n\n if (!(target && target.nodeType == 1)) {\n throw new Error('target must be an Element');\n }\n\n this._registerInstance();\n\n this._observationTargets.push({\n element: target,\n entry: null\n });\n\n this._monitorIntersections();\n\n this._checkForIntersections();\n };\n /**\n * Stops observing a target element for intersection changes.\n * @param {Element} target The DOM element to observe.\n */\n\n\n IntersectionObserver.prototype.unobserve = function (target) {\n this._observationTargets = this._observationTargets.filter(function (item) {\n return item.element != target;\n });\n\n if (!this._observationTargets.length) {\n this._unmonitorIntersections();\n\n this._unregisterInstance();\n }\n };\n /**\n * Stops observing all target elements for intersection changes.\n */\n\n\n IntersectionObserver.prototype.disconnect = function () {\n this._observationTargets = [];\n\n this._unmonitorIntersections();\n\n this._unregisterInstance();\n };\n /**\n * Returns any queue entries that have not yet been reported to the\n * callback and clears the queue. This can be used in conjunction with the\n * callback to obtain the absolute most up-to-date intersection information.\n * @return {Array} The currently queued entries.\n */\n\n\n IntersectionObserver.prototype.takeRecords = function () {\n var records = this._queuedEntries.slice();\n\n this._queuedEntries = [];\n return records;\n };\n /**\n * Accepts the threshold value from the user configuration object and\n * returns a sorted array of unique threshold values. If a value is not\n * between 0 and 1 and error is thrown.\n * @private\n * @param {Array|number=} opt_threshold An optional threshold value or\n * a list of threshold values, defaulting to [0].\n * @return {Array} A sorted list of unique and valid threshold values.\n */\n\n\n IntersectionObserver.prototype._initThresholds = function (opt_threshold) {\n var threshold = opt_threshold || [0];\n if (!Array.isArray(threshold)) threshold = [threshold];\n return threshold.sort().filter(function (t, i, a) {\n if (typeof t != 'number' || isNaN(t) || t < 0 || t > 1) {\n throw new Error('threshold must be a number between 0 and 1 inclusively');\n }\n\n return t !== a[i - 1];\n });\n };\n /**\n * Accepts the rootMargin value from the user configuration object\n * and returns an array of the four margin values as an object containing\n * the value and unit properties. If any of the values are not properly\n * formatted or use a unit other than px or %, and error is thrown.\n * @private\n * @param {string=} opt_rootMargin An optional rootMargin value,\n * defaulting to '0px'.\n * @return {Array<Object>} An array of margin objects with the keys\n * value and unit.\n */\n\n\n IntersectionObserver.prototype._parseRootMargin = function (opt_rootMargin) {\n var marginString = opt_rootMargin || '0px';\n var margins = marginString.split(/\\s+/).map(function (margin) {\n var parts = /^(-?\\d*\\.?\\d+)(px|%)$/.exec(margin);\n\n if (!parts) {\n throw new Error('rootMargin must be specified in pixels or percent');\n }\n\n return {\n value: parseFloat(parts[1]),\n unit: parts[2]\n };\n }); // Handles shorthand.\n\n margins[1] = margins[1] || margins[0];\n margins[2] = margins[2] || margins[0];\n margins[3] = margins[3] || margins[1];\n return margins;\n };\n /**\n * Starts polling for intersection changes if the polling is not already\n * happening, and if the page's visibility state is visible.\n * @private\n */\n\n\n IntersectionObserver.prototype._monitorIntersections = function () {\n if (!this._monitoringIntersections) {\n this._monitoringIntersections = true; // If a poll interval is set, use polling instead of listening to\n // resize and scroll events or DOM mutations.\n\n if (this.POLL_INTERVAL) {\n this._monitoringInterval = setInterval(this._checkForIntersections, this.POLL_INTERVAL);\n } else {\n addEvent(window, 'resize', this._checkForIntersections, true);\n addEvent(document, 'scroll', this._checkForIntersections, true);\n\n if (this.USE_MUTATION_OBSERVER && 'MutationObserver' in window) {\n this._domObserver = new MutationObserver(this._checkForIntersections);\n\n this._domObserver.observe(document, {\n attributes: true,\n childList: true,\n characterData: true,\n subtree: true\n });\n }\n }\n }\n };\n /**\n * Stops polling for intersection changes.\n * @private\n */\n\n\n IntersectionObserver.prototype._unmonitorIntersections = function () {\n if (this._monitoringIntersections) {\n this._monitoringIntersections = false;\n clearInterval(this._monitoringInterval);\n this._monitoringInterval = null;\n removeEvent(window, 'resize', this._checkForIntersections, true);\n removeEvent(document, 'scroll', this._checkForIntersections, true);\n\n if (this._domObserver) {\n this._domObserver.disconnect();\n\n this._domObserver = null;\n }\n }\n };\n /**\n * Scans each observation target for intersection changes and adds them\n * to the internal entries queue. If new entries are found, it\n * schedules the callback to be invoked.\n * @private\n */\n\n\n IntersectionObserver.prototype._checkForIntersections = function () {\n var rootIsInDom = this._rootIsInDom();\n\n var rootRect = rootIsInDom ? this._getRootRect() : getEmptyRect();\n\n this._observationTargets.forEach(function (item) {\n var target = item.element;\n var targetRect = getBoundingClientRect(target);\n\n var rootContainsTarget = this._rootContainsTarget(target);\n\n var oldEntry = item.entry;\n\n var intersectionRect = rootIsInDom && rootContainsTarget && this._computeTargetAndRootIntersection(target, rootRect);\n\n var newEntry = item.entry = new IntersectionObserverEntry({\n time: now(),\n target: target,\n boundingClientRect: targetRect,\n rootBounds: rootRect,\n intersectionRect: intersectionRect\n });\n\n if (!oldEntry) {\n this._queuedEntries.push(newEntry);\n } else if (rootIsInDom && rootContainsTarget) {\n // If the new entry intersection ratio has crossed any of the\n // thresholds, add a new entry.\n if (this._hasCrossedThreshold(oldEntry, newEntry)) {\n this._queuedEntries.push(newEntry);\n }\n } else {\n // If the root is not in the DOM or target is not contained within\n // root but the previous entry for this target had an intersection,\n // add a new record indicating removal.\n if (oldEntry && oldEntry.isIntersecting) {\n this._queuedEntries.push(newEntry);\n }\n }\n }, this);\n\n if (this._queuedEntries.length) {\n this._callback(this.takeRecords(), this);\n }\n };\n /**\n * Accepts a target and root rect computes the intersection between then\n * following the algorithm in the spec.\n * TODO(philipwalton): at this time clip-path is not considered.\n * https://w3c.github.io/IntersectionObserver/#calculate-intersection-rect-algo\n * @param {Element} target The target DOM element\n * @param {Object} rootRect The bounding rect of the root after being\n * expanded by the rootMargin value.\n * @return {?Object} The final intersection rect object or undefined if no\n * intersection is found.\n * @private\n */\n\n\n IntersectionObserver.prototype._computeTargetAndRootIntersection = function (target, rootRect) {\n // If the element isn't displayed, an intersection can't happen.\n if (window.getComputedStyle(target).display == 'none') return;\n var targetRect = getBoundingClientRect(target);\n var intersectionRect = targetRect;\n var parent = getParentNode(target);\n var atRoot = false;\n\n while (!atRoot) {\n var parentRect = null;\n var parentComputedStyle = parent.nodeType == 1 ? window.getComputedStyle(parent) : {}; // If the parent isn't displayed, an intersection can't happen.\n\n if (parentComputedStyle.display == 'none') return;\n\n if (parent == this.root || parent == document) {\n atRoot = true;\n parentRect = rootRect;\n } else {\n // If the element has a non-visible overflow, and it's not the <body>\n // or <html> element, update the intersection rect.\n // Note: <body> and <html> cannot be clipped to a rect that's not also\n // the document rect, so no need to compute a new intersection.\n if (parent != document.body && parent != document.documentElement && parentComputedStyle.overflow != 'visible') {\n parentRect = getBoundingClientRect(parent);\n }\n } // If either of the above conditionals set a new parentRect,\n // calculate new intersection data.\n\n\n if (parentRect) {\n intersectionRect = computeRectIntersection(parentRect, intersectionRect);\n if (!intersectionRect) break;\n }\n\n parent = getParentNode(parent);\n }\n\n return intersectionRect;\n };\n /**\n * Returns the root rect after being expanded by the rootMargin value.\n * @return {Object} The expanded root rect.\n * @private\n */\n\n\n IntersectionObserver.prototype._getRootRect = function () {\n var rootRect;\n\n if (this.root) {\n rootRect = getBoundingClientRect(this.root);\n } else {\n // Use <html>/<body> instead of window since scroll bars affect size.\n var html = document.documentElement;\n var body = document.body;\n rootRect = {\n top: 0,\n left: 0,\n right: html.clientWidth || body.clientWidth,\n width: html.clientWidth || body.clientWidth,\n bottom: html.clientHeight || body.clientHeight,\n height: html.clientHeight || body.clientHeight\n };\n }\n\n return this._expandRectByRootMargin(rootRect);\n };\n /**\n * Accepts a rect and expands it by the rootMargin value.\n * @param {Object} rect The rect object to expand.\n * @return {Object} The expanded rect.\n * @private\n */\n\n\n IntersectionObserver.prototype._expandRectByRootMargin = function (rect) {\n var margins = this._rootMarginValues.map(function (margin, i) {\n return margin.unit == 'px' ? margin.value : margin.value * (i % 2 ? rect.width : rect.height) / 100;\n });\n\n var newRect = {\n top: rect.top - margins[0],\n right: rect.right + margins[1],\n bottom: rect.bottom + margins[2],\n left: rect.left - margins[3]\n };\n newRect.width = newRect.right - newRect.left;\n newRect.height = newRect.bottom - newRect.top;\n return newRect;\n };\n /**\n * Accepts an old and new entry and returns true if at least one of the\n * threshold values has been crossed.\n * @param {?IntersectionObserverEntry} oldEntry The previous entry for a\n * particular target element or null if no previous entry exists.\n * @param {IntersectionObserverEntry} newEntry The current entry for a\n * particular target element.\n * @return {boolean} Returns true if a any threshold has been crossed.\n * @private\n */\n\n\n IntersectionObserver.prototype._hasCrossedThreshold = function (oldEntry, newEntry) {\n // To make comparing easier, an entry that has a ratio of 0\n // but does not actually intersect is given a value of -1\n var oldRatio = oldEntry && oldEntry.isIntersecting ? oldEntry.intersectionRatio || 0 : -1;\n var newRatio = newEntry.isIntersecting ? newEntry.intersectionRatio || 0 : -1; // Ignore unchanged ratios\n\n if (oldRatio === newRatio) return;\n\n for (var i = 0; i < this.thresholds.length; i++) {\n var threshold = this.thresholds[i]; // Return true if an entry matches a threshold or if the new ratio\n // and the old ratio are on the opposite sides of a threshold.\n\n if (threshold == oldRatio || threshold == newRatio || threshold < oldRatio !== threshold < newRatio) {\n return true;\n }\n }\n };\n /**\n * Returns whether or not the root element is an element and is in the DOM.\n * @return {boolean} True if the root element is an element and is in the DOM.\n * @private\n */\n\n\n IntersectionObserver.prototype._rootIsInDom = function () {\n return !this.root || containsDeep(document, this.root);\n };\n /**\n * Returns whether or not the target element is a child of root.\n * @param {Element} target The target element to check.\n * @return {boolean} True if the target element is a child of root.\n * @private\n */\n\n\n IntersectionObserver.prototype._rootContainsTarget = function (target) {\n return containsDeep(this.root || document, target);\n };\n /**\n * Adds the instance to the global IntersectionObserver registry if it isn't\n * already present.\n * @private\n */\n\n\n IntersectionObserver.prototype._registerInstance = function () {\n if (registry.indexOf(this) < 0) {\n registry.push(this);\n }\n };\n /**\n * Removes the instance from the global IntersectionObserver registry.\n * @private\n */\n\n\n IntersectionObserver.prototype._unregisterInstance = function () {\n var index = registry.indexOf(this);\n if (index != -1) registry.splice(index, 1);\n };\n /**\n * Returns the result of the performance.now() method or null in browsers\n * that don't support the API.\n * @return {number} The elapsed time since the page was requested.\n */\n\n\n function now() {\n return window.performance && performance.now && performance.now();\n }\n /**\n * Throttles a function and delays its execution, so it's only called at most\n * once within a given time period.\n * @param {Function} fn The function to throttle.\n * @param {number} timeout The amount of time that must pass before the\n * function can be called again.\n * @return {Function} The throttled function.\n */\n\n\n function throttle(fn, timeout) {\n var timer = null;\n return function () {\n if (!timer) {\n timer = setTimeout(function () {\n fn();\n timer = null;\n }, timeout);\n }\n };\n }\n /**\n * Adds an event handler to a DOM node ensuring cross-browser compatibility.\n * @param {Node} node The DOM node to add the event handler to.\n * @param {string} event The event name.\n * @param {Function} fn The event handler to add.\n * @param {boolean} opt_useCapture Optionally adds the even to the capture\n * phase. Note: this only works in modern browsers.\n */\n\n\n function addEvent(node, event, fn, opt_useCapture) {\n if (typeof node.addEventListener == 'function') {\n node.addEventListener(event, fn, opt_useCapture || false);\n } else if (typeof node.attachEvent == 'function') {\n node.attachEvent('on' + event, fn);\n }\n }\n /**\n * Removes a previously added event handler from a DOM node.\n * @param {Node} node The DOM node to remove the event handler from.\n * @param {string} event The event name.\n * @param {Function} fn The event handler to remove.\n * @param {boolean} opt_useCapture If the event handler was added with this\n * flag set to true, it should be set to true here in order to remove it.\n */\n\n\n function removeEvent(node, event, fn, opt_useCapture) {\n if (typeof node.removeEventListener == 'function') {\n node.removeEventListener(event, fn, opt_useCapture || false);\n } else if (typeof node.detatchEvent == 'function') {\n node.detatchEvent('on' + event, fn);\n }\n }\n /**\n * Returns the intersection between two rect objects.\n * @param {Object} rect1 The first rect.\n * @param {Object} rect2 The second rect.\n * @return {?Object} The intersection rect or undefined if no intersection\n * is found.\n */\n\n\n function computeRectIntersection(rect1, rect2) {\n var top = Math.max(rect1.top, rect2.top);\n var bottom = Math.min(rect1.bottom, rect2.bottom);\n var left = Math.max(rect1.left, rect2.left);\n var right = Math.min(rect1.right, rect2.right);\n var width = right - left;\n var height = bottom - top;\n return width >= 0 && height >= 0 && {\n top: top,\n bottom: bottom,\n left: left,\n right: right,\n width: width,\n height: height\n };\n }\n /**\n * Shims the native getBoundingClientRect for compatibility with older IE.\n * @param {Element} el The element whose bounding rect to get.\n * @return {Object} The (possibly shimmed) rect of the element.\n */\n\n\n function getBoundingClientRect(el) {\n var rect;\n\n try {\n rect = el.getBoundingClientRect();\n } catch (err) {// Ignore Windows 7 IE11 \"Unspecified error\"\n // https://github.com/w3c/IntersectionObserver/pull/205\n }\n\n if (!rect) return getEmptyRect(); // Older IE\n\n if (!(rect.width && rect.height)) {\n rect = {\n top: rect.top,\n right: rect.right,\n bottom: rect.bottom,\n left: rect.left,\n width: rect.right - rect.left,\n height: rect.bottom - rect.top\n };\n }\n\n return rect;\n }\n /**\n * Returns an empty rect object. An empty rect is returned when an element\n * is not in the DOM.\n * @return {Object} The empty rect.\n */\n\n\n function getEmptyRect() {\n return {\n top: 0,\n bottom: 0,\n left: 0,\n right: 0,\n width: 0,\n height: 0\n };\n }\n /**\n * Checks to see if a parent element contains a child element (including inside\n * shadow DOM).\n * @param {Node} parent The parent element.\n * @param {Node} child The child element.\n * @return {boolean} True if the parent node contains the child node.\n */\n\n\n function containsDeep(parent, child) {\n var node = child;\n\n while (node) {\n if (node == parent) return true;\n node = getParentNode(node);\n }\n\n return false;\n }\n /**\n * Gets the parent node of an element or its host element if the parent node\n * is a shadow root.\n * @param {Node} node The node whose parent to get.\n * @return {Node|null} The parent node or null if no parent exists.\n */\n\n\n function getParentNode(node) {\n var parent = node.parentNode;\n\n if (parent && parent.nodeType == 11 && parent.host) {\n // If the parent is a shadow root, return the host element.\n return parent.host;\n }\n\n return parent;\n } // Exposes the constructors globally.\n\n\n window.IntersectionObserver = IntersectionObserver;\n window.IntersectionObserverEntry = IntersectionObserverEntry;\n})(window, document);","(function (factory) {\n if (typeof define === 'function' && define.amd) {\n define([], factory);\n } else if (typeof module === 'object' && module.exports) {\n module.exports = factory();\n } else {\n window.idleCallbackShim = factory();\n }\n})(function () {\n 'use strict';\n\n var scheduleStart, throttleDelay, lazytimer, lazyraf;\n var root = typeof window != 'undefined' ? window : typeof global != undefined ? global : this || {};\n var requestAnimationFrame = root.cancelRequestAnimationFrame && root.requestAnimationFrame || setTimeout;\n var cancelRequestAnimationFrame = root.cancelRequestAnimationFrame || clearTimeout;\n var tasks = [];\n var runAttempts = 0;\n var isRunning = false;\n var remainingTime = 7;\n var minThrottle = 35;\n var throttle = 125;\n var index = 0;\n var taskStart = 0;\n var tasklength = 0;\n var IdleDeadline = {\n get didTimeout() {\n return false;\n },\n\n timeRemaining: function timeRemaining() {\n var timeRemaining = remainingTime - (Date.now() - taskStart);\n return timeRemaining < 0 ? 0 : timeRemaining;\n }\n };\n var setInactive = debounce(function () {\n remainingTime = 22;\n throttle = 66;\n minThrottle = 0;\n });\n\n function debounce(fn) {\n var id, timestamp;\n var wait = 99;\n\n var check = function check() {\n var last = Date.now() - timestamp;\n\n if (last < wait) {\n id = setTimeout(check, wait - last);\n } else {\n id = null;\n fn();\n }\n };\n\n return function () {\n timestamp = Date.now();\n\n if (!id) {\n id = setTimeout(check, wait);\n }\n };\n }\n\n function abortRunning() {\n if (isRunning) {\n if (lazyraf) {\n cancelRequestAnimationFrame(lazyraf);\n }\n\n if (lazytimer) {\n clearTimeout(lazytimer);\n }\n\n isRunning = false;\n }\n }\n\n function onInputorMutation() {\n if (throttle != 125) {\n remainingTime = 7;\n throttle = 125;\n minThrottle = 35;\n\n if (isRunning) {\n abortRunning();\n scheduleLazy();\n }\n }\n\n setInactive();\n }\n\n function scheduleAfterRaf() {\n lazyraf = null;\n lazytimer = setTimeout(runTasks, 0);\n }\n\n function scheduleRaf() {\n lazytimer = null;\n requestAnimationFrame(scheduleAfterRaf);\n }\n\n function scheduleLazy() {\n if (isRunning) {\n return;\n }\n\n throttleDelay = throttle - (Date.now() - taskStart);\n scheduleStart = Date.now();\n isRunning = true;\n\n if (minThrottle && throttleDelay < minThrottle) {\n throttleDelay = minThrottle;\n }\n\n if (throttleDelay > 9) {\n lazytimer = setTimeout(scheduleRaf, throttleDelay);\n } else {\n throttleDelay = 0;\n scheduleRaf();\n }\n }\n\n function runTasks() {\n var task, i, len;\n var timeThreshold = remainingTime > 9 ? 9 : 1;\n taskStart = Date.now();\n isRunning = false;\n lazytimer = null;\n\n if (runAttempts > 2 || taskStart - throttleDelay - 50 < scheduleStart) {\n for (i = 0, len = tasks.length; i < len && IdleDeadline.timeRemaining() > timeThreshold; i++) {\n task = tasks.shift();\n tasklength++;\n\n if (task) {\n task(IdleDeadline);\n }\n }\n }\n\n if (tasks.length) {\n scheduleLazy();\n } else {\n runAttempts = 0;\n }\n }\n\n function requestIdleCallbackShim(task) {\n index++;\n tasks.push(task);\n scheduleLazy();\n return index;\n }\n\n function cancelIdleCallbackShim(id) {\n var index = id - 1 - tasklength;\n\n if (tasks[index]) {\n tasks[index] = null;\n }\n }\n\n if (!root.requestIdleCallback || !root.cancelIdleCallback) {\n root.requestIdleCallback = requestIdleCallbackShim;\n root.cancelIdleCallback = cancelIdleCallbackShim;\n\n if (root.document && document.addEventListener) {\n root.addEventListener('scroll', onInputorMutation, true);\n root.addEventListener('resize', onInputorMutation);\n document.addEventListener('focus', onInputorMutation, true);\n document.addEventListener('mouseover', onInputorMutation, true);\n ['click', 'keypress', 'touchstart', 'mousedown'].forEach(function (name) {\n document.addEventListener(name, onInputorMutation, {\n capture: true,\n passive: true\n });\n });\n\n if (root.MutationObserver) {\n new MutationObserver(onInputorMutation).observe(document.documentElement, {\n childList: true,\n subtree: true,\n attributes: true\n });\n }\n }\n } else {\n try {\n root.requestIdleCallback(function () {}, {\n timeout: 0\n });\n } catch (e) {\n (function (rIC) {\n var timeRemainingProto, timeRemaining;\n\n root.requestIdleCallback = function (fn, timeout) {\n if (timeout && typeof timeout.timeout == 'number') {\n return rIC(fn, timeout.timeout);\n }\n\n return rIC(fn);\n };\n\n if (root.IdleCallbackDeadline && (timeRemainingProto = IdleCallbackDeadline.prototype)) {\n timeRemaining = Object.getOwnPropertyDescriptor(timeRemainingProto, 'timeRemaining');\n\n if (!timeRemaining || !timeRemaining.configurable || !timeRemaining.get) {\n return;\n }\n\n Object.defineProperty(timeRemainingProto, 'timeRemaining', {\n value: function value() {\n return timeRemaining.get.call(this);\n },\n enumerable: true,\n configurable: true\n });\n }\n })(root.requestIdleCallback);\n }\n }\n\n return {\n request: requestIdleCallbackShim,\n cancel: cancelIdleCallbackShim\n };\n});","/*! npm.im/object-fit-images 3.2.4 */\n'use strict';\n\nvar OFI = 'bfred-it:object-fit-images';\nvar propRegex = /(object-fit|object-position)\\s*:\\s*([-.\\w\\s%]+)/g;\nvar testImg = typeof Image === 'undefined' ? {\n style: {\n 'object-position': 1\n }\n} : new Image();\nvar supportsObjectFit = 'object-fit' in testImg.style;\nvar supportsObjectPosition = 'object-position' in testImg.style;\nvar supportsOFI = 'background-size' in testImg.style;\nvar supportsCurrentSrc = typeof testImg.currentSrc === 'string';\nvar nativeGetAttribute = testImg.getAttribute;\nvar nativeSetAttribute = testImg.setAttribute;\nvar autoModeEnabled = false;\n\nfunction createPlaceholder(w, h) {\n return \"data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='\" + w + \"' height='\" + h + \"'%3E%3C/svg%3E\";\n}\n\nfunction polyfillCurrentSrc(el) {\n if (el.srcset && !supportsCurrentSrc && window.picturefill) {\n var pf = window.picturefill._; // parse srcset with picturefill where currentSrc isn't available\n\n if (!el[pf.ns] || !el[pf.ns].evaled) {\n // force synchronous srcset parsing\n pf.fillImg(el, {\n reselect: true\n });\n }\n\n if (!el[pf.ns].curSrc) {\n // force picturefill to parse srcset\n el[pf.ns].supported = false;\n pf.fillImg(el, {\n reselect: true\n });\n } // retrieve parsed currentSrc, if any\n\n\n el.currentSrc = el[pf.ns].curSrc || el.src;\n }\n}\n\nfunction getStyle(el) {\n var style = getComputedStyle(el).fontFamily;\n var parsed;\n var props = {};\n\n while ((parsed = propRegex.exec(style)) !== null) {\n props[parsed[1]] = parsed[2];\n }\n\n return props;\n}\n\nfunction setPlaceholder(img, width, height) {\n // Default: fill width, no height\n var placeholder = createPlaceholder(width || 1, height || 0); // Only set placeholder if it's different\n\n if (nativeGetAttribute.call(img, 'src') !== placeholder) {\n nativeSetAttribute.call(img, 'src', placeholder);\n }\n}\n\nfunction onImageReady(img, callback) {\n // naturalWidth is only available when the image headers are loaded,\n // this loop will poll it every 100ms.\n if (img.naturalWidth) {\n callback(img);\n } else {\n setTimeout(onImageReady, 100, img, callback);\n }\n}\n\nfunction fixOne(el) {\n var style = getStyle(el);\n var ofi = el[OFI];\n style['object-fit'] = style['object-fit'] || 'fill'; // default value\n // Avoid running where unnecessary, unless OFI had already done its deed\n\n if (!ofi.img) {\n // fill is the default behavior so no action is necessary\n if (style['object-fit'] === 'fill') {\n return;\n } // Where object-fit is supported and object-position isn't (Safari < 10)\n\n\n if (!ofi.skipTest && // unless user wants to apply regardless of browser support\n supportsObjectFit && // if browser already supports object-fit\n !style['object-position'] // unless object-position is used\n ) {\n return;\n }\n } // keep a clone in memory while resetting the original to a blank\n\n\n if (!ofi.img) {\n ofi.img = new Image(el.width, el.height);\n ofi.img.srcset = nativeGetAttribute.call(el, \"data-ofi-srcset\") || el.srcset;\n ofi.img.src = nativeGetAttribute.call(el, \"data-ofi-src\") || el.src; // preserve for any future cloneNode calls\n // https://github.com/bfred-it/object-fit-images/issues/53\n\n nativeSetAttribute.call(el, \"data-ofi-src\", el.src);\n\n if (el.srcset) {\n nativeSetAttribute.call(el, \"data-ofi-srcset\", el.srcset);\n }\n\n setPlaceholder(el, el.naturalWidth || el.width, el.naturalHeight || el.height); // remove srcset because it overrides src\n\n if (el.srcset) {\n el.srcset = '';\n }\n\n try {\n keepSrcUsable(el);\n } catch (err) {\n if (window.console) {\n console.warn('https://bit.ly/ofi-old-browser');\n }\n }\n }\n\n polyfillCurrentSrc(ofi.img);\n el.style.backgroundImage = \"url(\\\"\" + (ofi.img.currentSrc || ofi.img.src).replace(/\"/g, '\\\\\"') + \"\\\")\";\n el.style.backgroundPosition = style['object-position'] || 'center';\n el.style.backgroundRepeat = 'no-repeat';\n el.style.backgroundOrigin = 'content-box';\n\n if (/scale-down/.test(style['object-fit'])) {\n onImageReady(ofi.img, function () {\n if (ofi.img.naturalWidth > el.width || ofi.img.naturalHeight > el.height) {\n el.style.backgroundSize = 'contain';\n } else {\n el.style.backgroundSize = 'auto';\n }\n });\n } else {\n el.style.backgroundSize = style['object-fit'].replace('none', 'auto').replace('fill', '100% 100%');\n }\n\n onImageReady(ofi.img, function (img) {\n setPlaceholder(el, img.naturalWidth, img.naturalHeight);\n });\n}\n\nfunction keepSrcUsable(el) {\n var descriptors = {\n get: function get(prop) {\n return el[OFI].img[prop ? prop : 'src'];\n },\n set: function set(value, prop) {\n el[OFI].img[prop ? prop : 'src'] = value;\n nativeSetAttribute.call(el, \"data-ofi-\" + prop, value); // preserve for any future cloneNode\n\n fixOne(el);\n return value;\n }\n };\n Object.defineProperty(el, 'src', descriptors);\n Object.defineProperty(el, 'currentSrc', {\n get: function get() {\n return descriptors.get('currentSrc');\n }\n });\n Object.defineProperty(el, 'srcset', {\n get: function get() {\n return descriptors.get('srcset');\n },\n set: function set(ss) {\n return descriptors.set(ss, 'srcset');\n }\n });\n}\n\nfunction hijackAttributes() {\n function getOfiImageMaybe(el, name) {\n return el[OFI] && el[OFI].img && (name === 'src' || name === 'srcset') ? el[OFI].img : el;\n }\n\n if (!supportsObjectPosition) {\n HTMLImageElement.prototype.getAttribute = function (name) {\n return nativeGetAttribute.call(getOfiImageMaybe(this, name), name);\n };\n\n HTMLImageElement.prototype.setAttribute = function (name, value) {\n return nativeSetAttribute.call(getOfiImageMaybe(this, name), name, String(value));\n };\n }\n}\n\nfunction fix(imgs, opts) {\n var startAutoMode = !autoModeEnabled && !imgs;\n opts = opts || {};\n imgs = imgs || 'img';\n\n if (supportsObjectPosition && !opts.skipTest || !supportsOFI) {\n return false;\n } // use imgs as a selector or just select all images\n\n\n if (imgs === 'img') {\n imgs = document.getElementsByTagName('img');\n } else if (typeof imgs === 'string') {\n imgs = document.querySelectorAll(imgs);\n } else if (!('length' in imgs)) {\n imgs = [imgs];\n } // apply fix to all\n\n\n for (var i = 0; i < imgs.length; i++) {\n imgs[i][OFI] = imgs[i][OFI] || {\n skipTest: opts.skipTest\n };\n fixOne(imgs[i]);\n }\n\n if (startAutoMode) {\n document.body.addEventListener('load', function (e) {\n if (e.target.tagName === 'IMG') {\n fix(e.target, {\n skipTest: opts.skipTest\n });\n }\n }, true);\n autoModeEnabled = true;\n imgs = 'img'; // reset to a generic selector for watchMQ\n } // if requested, watch media queries for object-fit change\n\n\n if (opts.watchMQ) {\n window.addEventListener('resize', fix.bind(null, imgs, {\n skipTest: opts.skipTest\n }));\n }\n}\n\nfix.supportsObjectFit = supportsObjectFit;\nfix.supportsObjectPosition = supportsObjectPosition;\nhijackAttributes();\nmodule.exports = fix;"],"sourceRoot":""} |