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{\n\t\t\treturn element !== elementToPurge;\n\t\t});\n\t};\n\n\tvar getTopOffset = function getTopOffset(element) {\n\t\treturn element.getBoundingClientRect().top + window.pageYOffset - element.ownerDocument.documentElement.clientTop;\n\t};\n\n\tvar isBelowViewport = function isBelowViewport(element, container, threshold) {\n\t\tvar fold = container === window ? window.innerHeight + window.pageYOffset : getTopOffset(container) + container.offsetHeight;\n\t\treturn fold <= getTopOffset(element) - threshold;\n\t};\n\n\tvar getLeftOffset = function getLeftOffset(element) {\n\t\treturn element.getBoundingClientRect().left + window.pageXOffset - element.ownerDocument.documentElement.clientLeft;\n\t};\n\n\tvar isAtRightOfViewport = function isAtRightOfViewport(element, container, threshold) {\n\t\tvar documentWidth = window.innerWidth;\n\t\tvar fold = container === window ? documentWidth + window.pageXOffset : getLeftOffset(container) + documentWidth;\n\t\treturn fold <= getLeftOffset(element) - threshold;\n\t};\n\n\tvar isAboveViewport = function isAboveViewport(element, container, threshold) {\n\t\tvar fold = container === window ? window.pageYOffset : getTopOffset(container);\n\t\treturn fold >= getTopOffset(element) + threshold + element.offsetHeight;\n\t};\n\n\tvar isAtLeftOfViewport = function isAtLeftOfViewport(element, container, threshold) {\n\t\tvar fold = container === window ? window.pageXOffset : getLeftOffset(container);\n\t\treturn fold >= getLeftOffset(element) + threshold + element.offsetWidth;\n\t};\n\n\tfunction isInsideViewport(element, container, threshold) {\n\t\treturn !isBelowViewport(element, container, threshold) && !isAboveViewport(element, container, threshold) && !isAtRightOfViewport(element, container, threshold) && !isAtLeftOfViewport(element, container, threshold);\n\t}\n\n\t/* Creates instance and notifies it through the window element */\n\tvar createInstance = function createInstance(classObj, options) {\n\t\tvar event;\n\t\tvar eventString = \"LazyLoad::Initialized\";\n\t\tvar instance = new classObj(options);\n\t\ttry {\n\t\t\t// Works in modern browsers\n\t\t\tevent = new CustomEvent(eventString, { detail: { instance: instance } });\n\t\t} catch (err) {\n\t\t\t// Works in Internet Explorer (all versions)\n\t\t\tevent = document.createEvent(\"CustomEvent\");\n\t\t\tevent.initCustomEvent(eventString, false, false, { instance: instance });\n\t\t}\n\t\twindow.dispatchEvent(event);\n\t};\n\n\t/* Auto initialization of one or more instances of lazyload, depending on the \n     options passed in (plain object or an array) */\n\tfunction autoInitialize(classObj, options) {\n\t\tif (!options) {\n\t\t\treturn;\n\t\t}\n\t\tif (!options.length) {\n\t\t\t// Plain object\n\t\t\tcreateInstance(classObj, options);\n\t\t} else {\n\t\t\t// Array of objects\n\t\t\tfor (var i = 0, optionsItem; optionsItem = options[i]; i += 1) {\n\t\t\t\tcreateInstance(classObj, optionsItem);\n\t\t\t}\n\t\t}\n\t}\n\n\tvar replaceExtToWebp = function replaceExtToWebp(value, condition) {\n\t\treturn condition ? value.replace(/\\.(jpe?g|png)/gi, \".webp\") : value;\n\t};\n\n\tvar detectWebp = function detectWebp() {\n\t\tvar webpString = \"image/webp\";\n\t\tvar canvas = document.createElement(\"canvas\");\n\n\t\tif (canvas.getContext && canvas.getContext(\"2d\")) {\n\t\t\treturn canvas.toDataURL(webpString).indexOf('data:' + webpString) === 0;\n\t\t}\n\n\t\treturn false;\n\t};\n\n\tvar runningOnBrowser = typeof window !== \"undefined\";\n\n\tvar isBot = runningOnBrowser && !(\"onscroll\" in window) || /(gle|ing|ro)bot|crawl|spider/i.test(navigator.userAgent);\n\tvar supportsClassList = runningOnBrowser && \"classList\" in document.createElement(\"p\");\n\n\tvar supportsWebp = runningOnBrowser && detectWebp();\n\n\tvar addClass = function addClass(element, className) {\n\t\tif (supportsClassList) {\n\t\t\telement.classList.add(className);\n\t\t\treturn;\n\t\t}\n\t\telement.className += (element.className ? \" \" : \"\") + className;\n\t};\n\n\tvar removeClass = function removeClass(element, className) {\n\t\tif (supportsClassList) {\n\t\t\telement.classList.remove(className);\n\t\t\treturn;\n\t\t}\n\t\telement.className = element.className.replace(new RegExp(\"(^|\\\\s+)\" + className + \"(\\\\s+|$)\"), \" \").replace(/^\\s+/, \"\").replace(/\\s+$/, \"\");\n\t};\n\n\tvar setSourcesInChildren = function setSourcesInChildren(parentTag, attrName, dataAttrName, toWebpFlag) {\n\t\tfor (var i = 0, childTag; childTag = parentTag.children[i]; i += 1) {\n\t\t\tif (childTag.tagName === \"SOURCE\") {\n\t\t\t\tvar attrValue = getData(childTag, dataAttrName);\n\t\t\t\tsetAttributeIfValue(childTag, attrName, attrValue, toWebpFlag);\n\t\t\t}\n\t\t}\n\t};\n\n\tvar setAttributeIfValue = function setAttributeIfValue(element, attrName, value, toWebpFlag) {\n\t\tif (!value) {\n\t\t\treturn;\n\t\t}\n\t\telement.setAttribute(attrName, replaceExtToWebp(value, toWebpFlag));\n\t};\n\n\tvar setSourcesImg = function setSourcesImg(element, settings) {\n\t\tvar toWebpFlag = supportsWebp && settings.to_webp;\n\t\tvar srcsetDataName = settings.data_srcset;\n\t\tvar parent = element.parentNode;\n\n\t\tif (parent && parent.tagName === \"PICTURE\") {\n\t\t\tsetSourcesInChildren(parent, \"srcset\", srcsetDataName, toWebpFlag);\n\t\t}\n\t\tvar sizesDataValue = getData(element, settings.data_sizes);\n\t\tsetAttributeIfValue(element, \"sizes\", sizesDataValue);\n\t\tvar srcsetDataValue = getData(element, srcsetDataName);\n\t\tsetAttributeIfValue(element, \"srcset\", srcsetDataValue, toWebpFlag);\n\t\tvar srcDataValue = getData(element, settings.data_src);\n\t\tsetAttributeIfValue(element, \"src\", srcDataValue, toWebpFlag);\n\t};\n\n\tvar setSourcesIframe = function setSourcesIframe(element, settings) {\n\t\tvar srcDataValue = getData(element, settings.data_src);\n\n\t\tsetAttributeIfValue(element, \"src\", srcDataValue);\n\t};\n\n\tvar setSourcesVideo = function setSourcesVideo(element, settings) {\n\t\tvar srcDataName = settings.data_src;\n\t\tvar srcDataValue = getData(element, srcDataName);\n\n\t\tsetSourcesInChildren(element, \"src\", srcDataName);\n\t\tsetAttributeIfValue(element, \"src\", srcDataValue);\n\t\telement.load();\n\t};\n\n\tvar setSourcesBgImage = function setSourcesBgImage(element, settings) {\n\t\tvar toWebpFlag = supportsWebp && settings.to_webp;\n\t\tvar srcDataValue = getData(element, settings.data_src);\n\t\tvar bgDataValue = getData(element, settings.data_bg);\n\n\t\tif (srcDataValue) {\n\t\t\tvar setValue = replaceExtToWebp(srcDataValue, toWebpFlag);\n\t\t\telement.style.backgroundImage = 'url(\"' + setValue + '\")';\n\t\t}\n\n\t\tif (bgDataValue) {\n\t\t\tvar _setValue = replaceExtToWebp(bgDataValue, toWebpFlag);\n\t\t\telement.style.backgroundImage = _setValue;\n\t\t}\n\t};\n\n\tvar setSourcesFunctions = {\n\t\tIMG: setSourcesImg,\n\t\tIFRAME: setSourcesIframe,\n\t\tVIDEO: setSourcesVideo\n\t};\n\n\tvar setSources = function setSources(element, instance) {\n\t\tvar settings = instance._settings;\n\t\tvar tagName = element.tagName;\n\t\tvar setSourcesFunction = setSourcesFunctions[tagName];\n\t\tif (setSourcesFunction) {\n\t\t\tsetSourcesFunction(element, settings);\n\t\t\tinstance._updateLoadingCount(1);\n\t\t\tinstance._elements = purgeOneElement(instance._elements, element);\n\t\t\treturn;\n\t\t}\n\t\tsetSourcesBgImage(element, settings);\n\t};\n\n\tvar callbackIfSet = function callbackIfSet(callback, argument) {\n\t\tif (callback) {\n\t\t\tcallback(argument);\n\t\t}\n\t};\n\n\tvar genericLoadEventName = \"load\";\n\tvar mediaLoadEventName = \"loadeddata\";\n\tvar errorEventName = \"error\";\n\n\tvar addEventListener = function addEventListener(element, eventName, handler) {\n\t\telement.addEventListener(eventName, handler);\n\t};\n\n\tvar removeEventListener = function removeEventListener(element, eventName, handler) {\n\t\telement.removeEventListener(eventName, handler);\n\t};\n\n\tvar addAllEventListeners = function addAllEventListeners(element, loadHandler, errorHandler) {\n\t\taddEventListener(element, genericLoadEventName, loadHandler);\n\t\taddEventListener(element, mediaLoadEventName, loadHandler);\n\t\taddEventListener(element, errorEventName, errorHandler);\n\t};\n\n\tvar removeAllEventListeners = function removeAllEventListeners(element, loadHandler, errorHandler) {\n\t\tremoveEventListener(element, genericLoadEventName, loadHandler);\n\t\tremoveEventListener(element, mediaLoadEventName, loadHandler);\n\t\tremoveEventListener(element, errorEventName, errorHandler);\n\t};\n\n\tvar eventHandler = function eventHandler(event, success, instance) {\n\t\tvar settings = instance._settings;\n\t\tvar className = success ? settings.class_loaded : settings.class_error;\n\t\tvar callback = success ? settings.callback_load : settings.callback_error;\n\t\tvar element = event.target;\n\n\t\tremoveClass(element, settings.class_loading);\n\t\taddClass(element, className);\n\t\tcallbackIfSet(callback, element);\n\n\t\tinstance._updateLoadingCount(-1);\n\t};\n\n\tvar addOneShotEventListeners = function addOneShotEventListeners(element, instance) {\n\t\tvar loadHandler = function loadHandler(event) {\n\t\t\teventHandler(event, true, instance);\n\t\t\tremoveAllEventListeners(element, loadHandler, errorHandler);\n\t\t};\n\t\tvar errorHandler = function errorHandler(event) {\n\t\t\teventHandler(event, false, instance);\n\t\t\tremoveAllEventListeners(element, loadHandler, errorHandler);\n\t\t};\n\t\taddAllEventListeners(element, loadHandler, errorHandler);\n\t};\n\n\tvar managedTags = [\"IMG\", \"IFRAME\", \"VIDEO\"];\n\n\tfunction revealElement(element, instance, force) {\n\t\tvar settings = instance._settings;\n\t\tif (!force && getWasProcessedData(element)) {\n\t\t\treturn; // element has already been processed and force wasn't true\n\t\t}\n\t\tcallbackIfSet(settings.callback_enter, element);\n\t\tif (managedTags.indexOf(element.tagName) > -1) {\n\t\t\taddOneShotEventListeners(element, instance);\n\t\t\taddClass(element, settings.class_loading);\n\t\t}\n\t\tsetSources(element, instance);\n\t\tsetWasProcessedData(element);\n\t\tcallbackIfSet(settings.callback_set, element);\n\t}\n\n\tvar removeFromArray = function removeFromArray(elements, indexes) {\n\t\twhile (indexes.length) {\n\t\t\telements.splice(indexes.pop(), 1);\n\t\t}\n\t};\n\n\t/*\n  * Constructor\n  */\n\n\tvar LazyLoad = function LazyLoad(instanceSettings) {\n\t\tthis._settings = _extends({}, getDefaultSettings(), instanceSettings);\n\t\tthis._loadingCount = 0;\n\t\tthis._queryOriginNode = this._settings.container === window ? document : this._settings.container;\n\n\t\tthis._previousLoopTime = 0;\n\t\tthis._loopTimeout = null;\n\t\tthis._boundHandleScroll = this.handleScroll.bind(this);\n\n\t\tthis._isFirstLoop = true;\n\t\twindow.addEventListener(\"resize\", this._boundHandleScroll);\n\t\tthis.update();\n\t};\n\n\tLazyLoad.prototype = {\n\t\t_loopThroughElements: function _loopThroughElements(forceDownload) {\n\t\t\tvar settings = this._settings,\n\t\t\t    elements = this._elements,\n\t\t\t    elementsLength = !elements ? 0 : elements.length;\n\t\t\tvar i = void 0,\n\t\t\t    processedIndexes = [],\n\t\t\t    isFirstLoop = this._isFirstLoop;\n\n\t\t\tif (isFirstLoop) {\n\t\t\t\tthis._isFirstLoop = false;\n\t\t\t}\n\n\t\t\tif (elementsLength === 0) {\n\t\t\t\tthis._stopScrollHandler();\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\tfor (i = 0; i < elementsLength; i++) {\n\t\t\t\tvar element = elements[i];\n\t\t\t\t/* If must skip_invisible and element is invisible, skip it */\n\t\t\t\tif (settings.skip_invisible && element.offsetParent === null) {\n\t\t\t\t\tcontinue;\n\t\t\t\t}\n\n\t\t\t\tif (forceDownload || isInsideViewport(element, settings.container, settings.threshold)) {\n\t\t\t\t\tif (isFirstLoop) {\n\t\t\t\t\t\taddClass(element, settings.class_initial);\n\t\t\t\t\t}\n\t\t\t\t\tthis.load(element);\n\t\t\t\t\tprocessedIndexes.push(i);\n\t\t\t\t}\n\t\t\t}\n\n\t\t\t// Removing processed elements from this._elements.\n\t\t\tremoveFromArray(elements, processedIndexes);\n\t\t},\n\n\t\t_startScrollHandler: function _startScrollHandler() {\n\t\t\tif (!this._isHandlingScroll) {\n\t\t\t\tthis._isHandlingScroll = true;\n\t\t\t\tthis._settings.container.addEventListener(\"scroll\", this._boundHandleScroll);\n\t\t\t}\n\t\t},\n\n\t\t_stopScrollHandler: function _stopScrollHandler() {\n\t\t\tif (this._isHandlingScroll) {\n\t\t\t\tthis._isHandlingScroll = false;\n\t\t\t\tthis._settings.container.removeEventListener(\"scroll\", this._boundHandleScroll);\n\t\t\t}\n\t\t},\n\n\t\t_updateLoadingCount: function _updateLoadingCount(plusMinus) {\n\t\t\tthis._loadingCount += plusMinus;\n\t\t\tif (this._elements.length === 0 && this._loadingCount === 0) {\n\t\t\t\tcallbackIfSet(this._settings.callback_finish);\n\t\t\t}\n\t\t},\n\n\t\thandleScroll: function handleScroll() {\n\t\t\tvar throttle = this._settings.throttle;\n\n\t\t\tif (throttle !== 0) {\n\t\t\t\tvar now = Date.now();\n\t\t\t\tvar remainingTime = throttle - (now - this._previousLoopTime);\n\t\t\t\tif (remainingTime <= 0 || remainingTime > throttle) {\n\t\t\t\t\tif (this._loopTimeout) {\n\t\t\t\t\t\tclearTimeout(this._loopTimeout);\n\t\t\t\t\t\tthis._loopTimeout = null;\n\t\t\t\t\t}\n\t\t\t\t\tthis._previousLoopTime = now;\n\t\t\t\t\tthis._loopThroughElements();\n\t\t\t\t} else if (!this._loopTimeout) {\n\t\t\t\t\tthis._loopTimeout = setTimeout(function () {\n\t\t\t\t\t\tthis._previousLoopTime = Date.now();\n\t\t\t\t\t\tthis._loopTimeout = null;\n\t\t\t\t\t\tthis._loopThroughElements();\n\t\t\t\t\t}.bind(this), remainingTime);\n\t\t\t\t}\n\t\t\t} else {\n\t\t\t\tthis._loopThroughElements();\n\t\t\t}\n\t\t},\n\n\t\tloadAll: function loadAll() {\n\t\t\tthis._loopThroughElements(true);\n\t\t},\n\n\t\tupdate: function update(elements) {\n\t\t\tvar settings = this._settings;\n\t\t\tvar nodeSet = elements || this._queryOriginNode.querySelectorAll(settings.elements_selector);\n\n\t\t\tthis._elements = purgeProcessedElements(Array.prototype.slice.call(nodeSet) // NOTE: nodeset to array for IE compatibility\n\t\t\t);\n\n\t\t\tif (isBot) {\n\t\t\t\tthis.loadAll();\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\tthis._loopThroughElements();\n\t\t\tthis._startScrollHandler();\n\t\t},\n\n\t\tdestroy: function destroy() {\n\t\t\twindow.removeEventListener(\"resize\", this._boundHandleScroll);\n\t\t\tif (this._loopTimeout) {\n\t\t\t\tclearTimeout(this._loopTimeout);\n\t\t\t\tthis._loopTimeout = null;\n\t\t\t}\n\t\t\tthis._stopScrollHandler();\n\t\t\tthis._elements = null;\n\t\t\tthis._queryOriginNode = null;\n\t\t\tthis._settings = null;\n\t\t},\n\n\t\tload: function load(element, force) {\n\t\t\trevealElement(element, this, force);\n\t\t}\n\t};\n\n\t/* Automatic instances creation if required (useful for async script loading) */\n\tif (runningOnBrowser) {\n\t\tautoInitialize(LazyLoad, window.lazyLoadOptions);\n\t}\n\n\treturn LazyLoad;\n});"],"sourceRoot":""}