/*!
 * Vue-Lazyload.js v1.1.3
 * (c) 2017 Awe <hilongjw@gmail.com>
 * Released under the MIT License.
 */
!function(e,t){"object"==typeof exports&&"undefined"!=typeof module?module.exports=t():"function"==typeof define&&define.amd?define(t):e.VueLazyload=t()}(this,function(){"use strict";function e(e,t){if(e.length){var n=e.indexOf(t);return n>-1?e.splice(n,1):void 0}}function t(e,t){if(!e||!t)return e||{};if(e instanceof Object)for(var n in t)e[n]=t[n];return e}function n(e,t){for(var n=!1,r=0,i=e.length;r<i;r++)if(t(e[r])){n=!0;break}return n}function r(e,t){if("IMG"===e.tagName&&e.getAttribute("data-srcset")){var n=e.getAttribute("data-srcset"),r=[],i=e.parentNode,o=i.offsetWidth*t,s=void 0,a=void 0,u=void 0;n=n.trim().split(","),n.map(function(e){e=e.trim(),s=e.lastIndexOf(" "),s===-1?(a=e,u=999998):(a=e.substr(0,s),u=parseInt(e.substr(s+1,e.length-s-2),10)),r.push([u,a])}),r.sort(function(e,t){if(e[0]<t[0])return-1;if(e[0]>t[0])return 1;if(e[0]===t[0]){if(t[1].indexOf(".webp",t[1].length-5)!==-1)return 1;if(e[1].indexOf(".webp",e[1].length-5)!==-1)return-1}return 0});for(var l="",d=void 0,h=r.length,c=0;c<h;c++)if(d=r[c],d[0]>=o){l=d[1];break}return l}}function i(e,t){for(var n=void 0,r=0,i=e.length;r<i;r++)if(t(e[r])){n=e[r];break}return n}function o(){if(!f)return!1;var e=!0,t=document;try{var n=t.createElement("object");n.type="image/webp",n.style.visibility="hidden",n.innerHTML="!",t.body.appendChild(n),e=!n.offsetWidth,t.body.removeChild(n)}catch(t){e=!1}return e}function s(e,t){var n=null,r=0;return function(){if(!n){var i=Date.now()-r,o=this,s=arguments,a=function(){r=Date.now(),n=!1,e.apply(o,s)};i>=t?a():n=setTimeout(a,t)}}}function a(){if(f){var e=!1;try{var t=Object.defineProperty({},"passive",{get:function(){e=!0}});window.addEventListener("test",null,t)}catch(e){}return e}}function u(e){return null!==e&&"object"===("undefined"==typeof e?"undefined":c(e))}function l(e){if(!(e instanceof Object))return[];if(Object.keys)return Object.keys(e);var t=[];for(var n in e)e.hasOwnProperty(n)&&t.push(n);return t}function d(e,t){if(!(e instanceof t))throw new TypeError("Cannot call a class as a function")}function h(e,t){if(!(e instanceof t))throw new TypeError("Cannot call a class as a function")}var c="function"==typeof Symbol&&"symbol"==typeof Symbol.iterator?function(e){return typeof e}:function(e){return e&&"function"==typeof Symbol&&e.constructor===Symbol&&e!==Symbol.prototype?"symbol":typeof e},f="undefined"!=typeof window,v=f&&"IntersectionObserver"in window,p={event:"event",observer:"observer"},y=function(){var e=arguments.length>0&&void 0!==arguments[0]?arguments[0]:1;return f&&window.devicePixelRatio||e},b=a(),g={on:function(e,t,n){var r=arguments.length>3&&void 0!==arguments[3]&&arguments[3];b?e.addEventListener(t,n,{capture:r,passive:!0}):e.addEventListener(t,n,r)},off:function(e,t,n){var r=arguments.length>3&&void 0!==arguments[3]&&arguments[3];e.removeEventListener(t,n,r)}},m=function(e,t,n){var r=new Image;r.src=e.src,r.onload=function(){t({naturalHeight:r.naturalHeight,naturalWidth:r.naturalWidth,src:r.src})},r.onerror=function(e){n(e)}},L=function(e,t){return"undefined"!=typeof getComputedStyle?getComputedStyle(e,null).getPropertyValue(t):e.style[t]},w=function(e){return L(e,"overflow")+L(e,"overflow-y")+L(e,"overflow-x")},_=function(e){if(f){if(!(e instanceof HTMLElement))return window;for(var t=e;t&&t!==document.body&&t!==document.documentElement&&t.parentNode;){if(/(scroll|auto)/.test(w(t)))return t;t=t.parentNode}return window}},k=function(){function e(e,t){for(var n=0;n<t.length;n++){var r=t[n];r.enumerable=r.enumerable||!1,r.configurable=!0,"value"in r&&(r.writable=!0),Object.defineProperty(e,r.key,r)}}return function(t,n,r){return n&&e(t.prototype,n),r&&e(t,r),t}}(),E={},T=function(){function e(t){var n=t.el,r=t.src,i=t.error,o=t.loading,s=t.bindType,a=t.$parent,u=t.options,l=t.elRenderer;d(this,e),this.el=n,this.src=r,this.error=i,this.loading=o,this.bindType=s,this.attempt=0,this.naturalHeight=0,this.naturalWidth=0,this.options=u,this.filter(),this.initState(),this.performanceData={init:Date.now(),loadStart:null,loadEnd:null},this.rect=n.getBoundingClientRect(),this.$parent=a,this.elRenderer=l,this.render("loading",!1)}return k(e,[{key:"initState",value:function(){this.state={error:!1,loaded:!1,rendered:!1}}},{key:"record",value:function(e){this.performanceData[e]=Date.now()}},{key:"update",value:function(e){var t=e.src,n=e.loading,r=e.error,i=this.src;this.src=t,this.loading=n,this.error=r,this.filter(),i!==this.src&&(this.attempt=0,this.initState())}},{key:"getRect",value:function(){this.rect=this.el.getBoundingClientRect()}},{key:"checkInView",value:function(){return this.getRect(),this.rect.top<window.innerHeight*this.options.preLoad&&this.rect.bottom>this.options.preLoadTop&&this.rect.left<window.innerWidth*this.options.preLoad&&this.rect.right>0}},{key:"filter",value:function(){var e=this;l(this.options.filter).map(function(t){e.options.filter[t](e,e.options)})}},{key:"renderLoading",value:function(e){var t=this;m({src:this.loading},function(n){t.render("loading",!1),e()})}},{key:"load",value:function(){var e=this;return this.attempt>this.options.attempt-1&&this.state.error?void(this.options.silent||console.log("VueLazyload log: "+this.src+" tried too more than "+this.options.attempt+" times")):this.state.loaded||E[this.src]?this.render("loaded",!0):void this.renderLoading(function(){e.attempt++,e.record("loadStart"),m({src:e.src},function(t){e.naturalHeight=t.naturalHeight,e.naturalWidth=t.naturalWidth,e.state.loaded=!0,e.state.error=!1,e.record("loadEnd"),e.render("loaded",!1),E[e.src]=1},function(t){e.state.error=!0,e.state.loaded=!1,e.render("error",!1)})})}},{key:"render",value:function(e,t){this.elRenderer(this,e,t)}},{key:"performance",value:function(){var e="loading",t=0;return this.state.loaded&&(e="loaded",t=(this.performanceData.loadEnd-this.performanceData.loadStart)/1e3),this.state.error&&(e="error"),{src:this.src,state:e,time:t}}},{key:"destroy",value:function(){this.el=null,this.src=null,this.error=null,this.loading=null,this.bindType=null,this.attempt=0}}]),e}(),A=function(){function e(e,t){for(var n=0;n<t.length;n++){var r=t[n];r.enumerable=r.enumerable||!1,r.configurable=!0,"value"in r&&(r.writable=!0),Object.defineProperty(e,r.key,r)}}return function(t,n,r){return n&&e(t.prototype,n),r&&e(t,r),t}}(),$="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7",z=["scroll","wheel","mousewheel","resize","animationend","transitionend","touchmove"],H={rootMargin:"0px",threshold:0},O=function(a){return function(){function l(e){var t=e.preLoad,n=e.error,r=e.throttleWait,i=e.preLoadTop,a=e.dispatchEvent,u=e.loading,d=e.attempt,c=e.silent,f=e.scale,v=e.listenEvents,b=(e.hasbind,e.filter),g=e.adapter,m=e.observer,L=e.observerOptions;h(this,l),this.version="1.1.3",this.mode=p.event,this.ListenerQueue=[],this.TargetIndex=0,this.TargetQueue=[],this.options={silent:c||!0,dispatchEvent:!!a,throttleWait:r||200,preLoad:t||1.3,preLoadTop:i||0,error:n||$,loading:u||$,attempt:d||3,scale:f||y(f),ListenEvents:v||z,hasbind:!1,supportWebp:o(),filter:b||{},adapter:g||{},observer:!!m,observerOptions:L||H},this._initEvent(),this.lazyLoadHandler=s(this._lazyLoadHandler.bind(this),this.options.throttleWait),this.setMode(this.options.observer?p.observer:p.event)}return A(l,[{key:"config",value:function(){var e=arguments.length>0&&void 0!==arguments[0]?arguments[0]:{};t(this.options,e)}},{key:"performance",value:function(){var e=[];return this.ListenerQueue.map(function(t){e.push(t.performance())}),e}},{key:"addLazyBox",value:function(e){this.ListenerQueue.push(e),f&&(this._addListenerTarget(window),this._observer&&this._observer.observe(e.el),e.$el&&e.$el.parentNode&&this._addListenerTarget(e.$el.parentNode))}},{key:"add",value:function(e,t,i){var o=this;if(n(this.ListenerQueue,function(t){return t.el===e}))return this.update(e,t),a.nextTick(this.lazyLoadHandler);var s=this._valueFormatter(t.value),u=s.src,l=s.loading,d=s.error;a.nextTick(function(){u=r(e,o.options.scale)||u,o._observer&&o._observer.observe(e);var n=Object.keys(t.modifiers)[0],s=void 0;n&&(s=i.context.$refs[n],s=s?s.$el||s:document.getElementById(n)),s||(s=_(e));var h=new T({bindType:t.arg,$parent:s,el:e,loading:l,error:d,src:u,elRenderer:o._elRenderer.bind(o),options:o.options});o.ListenerQueue.push(h),f&&(o._addListenerTarget(window),o._addListenerTarget(s)),o.lazyLoadHandler(),a.nextTick(function(){return o.lazyLoadHandler()})})}},{key:"update",value:function(e,t){var n=this,o=this._valueFormatter(t.value),s=o.src,u=o.loading,l=o.error;s=r(e,this.options.scale)||s;var d=i(this.ListenerQueue,function(t){return t.el===e});d&&d.update({src:s,loading:u,error:l}),this._observer&&this._observer.observe(e),this.lazyLoadHandler(),a.nextTick(function(){return n.lazyLoadHandler()})}},{key:"remove",value:function(t){if(t){this._observer&&this._observer.unobserve(t);var n=i(this.ListenerQueue,function(e){return e.el===t});n&&(this._removeListenerTarget(n.$parent),this._removeListenerTarget(window),e(this.ListenerQueue,n)&&n.destroy())}}},{key:"removeComponent",value:function(t){t&&(e(this.ListenerQueue,t),this._observer&&this._observer.unobserve(t.el),t.$parent&&t.$el.parentNode&&this._removeListenerTarget(t.$el.parentNode),this._removeListenerTarget(window))}},{key:"setMode",value:function(e){var t=this;v||e!==p.observer||(e=p.event),this.mode=e,e===p.event?(this._observer&&(this.ListenerQueue.forEach(function(e){t._observer.unobserve(e.el)}),this._observer=null),this.TargetQueue.forEach(function(e){t._initListen(e.el,!0)})):(this.TargetQueue.forEach(function(e){t._initListen(e.el,!1)}),this._initIntersectionObserver())}},{key:"_addListenerTarget",value:function(e){if(e){var t=i(this.TargetQueue,function(t){return t.el===e});return t?t.childrenCount++:(t={el:e,id:++this.TargetIndex,childrenCount:1,listened:!0},this.mode===p.event&&this._initListen(t.el,!0),this.TargetQueue.push(t)),this.TargetIndex}}},{key:"_removeListenerTarget",value:function(e){var t=this;this.TargetQueue.forEach(function(n,r){n.el===e&&(n.childrenCount--,n.childrenCount||(t._initListen(n.el,!1),t.TargetQueue.splice(r,1),n=null))})}},{key:"_initListen",value:function(e,t){var n=this;this.options.ListenEvents.forEach(function(r){return g[t?"on":"off"](e,r,n.lazyLoadHandler)})}},{key:"_initEvent",value:function(){var t=this;this.Event={listeners:{loading:[],loaded:[],error:[]}},this.$on=function(e,n){t.Event.listeners[e].push(n)},this.$once=function(e,n){function r(){i.$off(e,r),n.apply(i,arguments)}var i=t;t.$on(e,r)},this.$off=function(n,r){return r?void e(t.Event.listeners[n],r):void(t.Event.listeners[n]=[])},this.$emit=function(e,n,r){t.Event.listeners[e].forEach(function(e){return e(n,r)})}}},{key:"_lazyLoadHandler",value:function(){var e=!1;this.ListenerQueue.forEach(function(t){t.state.loaded||(e=t.checkInView(),e&&t.load())})}},{key:"_initIntersectionObserver",value:function(){var e=this;v&&(this._observer=new IntersectionObserver(this._observerHandler.bind(this),this.options.observerOptions),this.ListenerQueue.length&&this.ListenerQueue.forEach(function(t){e._observer.observe(t.el)}))}},{key:"_observerHandler",value:function(e,t){var n=this;e.forEach(function(e){e.isIntersecting&&n.ListenerQueue.forEach(function(t){if(t.el===e.target){if(t.state.loaded)return n._observer.unobserve(t.el);t.load()}})})}},{key:"_elRenderer",value:function(e,t,n){if(e.el){var r=e.el,i=e.bindType,o=void 0;switch(t){case"loading":o=e.loading;break;case"error":o=e.error;break;default:o=e.src}if(i?r.style[i]="url("+o+")":r.getAttribute("src")!==o&&r.setAttribute("src",o),r.setAttribute("lazy",t),this.$emit(t,e,n),this.options.adapter[t]&&this.options.adapter[t](e,this.options),this.options.dispatchEvent){var s=new CustomEvent(t,{detail:e});r.dispatchEvent(s)}}}},{key:"_valueFormatter",value:function(e){var t=e,n=this.options.loading,r=this.options.error;return u(e)&&(e.src||this.options.silent||console.error("Vue Lazyload warning: miss src with "+e),t=e.src,n=e.loading||this.options.loading,r=e.error||this.options.error),{src:t,loading:n,error:r}}}]),l}()},Q=function(e){return{props:{tag:{type:String,default:"div"}},render:function(e){return this.show===!1?e(this.tag):e(this.tag,null,this.$slots.default)},data:function(){return{el:null,state:{loaded:!1},rect:{},show:!1}},mounted:function(){this.el=this.$el,e.addLazyBox(this),e.lazyLoadHandler()},beforeDestroy:function(){e.removeComponent(this)},methods:{getRect:function(){this.rect=this.$el.getBoundingClientRect()},checkInView:function(){return this.getRect(),f&&this.rect.top<window.innerHeight*e.options.preLoad&&this.rect.bottom>0&&this.rect.left<window.innerWidth*e.options.preLoad&&this.rect.right>0},load:function(){this.show=!0,this.state.loaded=!0,this.$emit("show",this)}}}},x={install:function(e){var n=arguments.length>1&&void 0!==arguments[1]?arguments[1]:{},r=O(e),i=new r(n),o="2"===e.version.split(".")[0];e.prototype.$Lazyload=i,n.lazyComponent&&e.component("lazy-component",Q(i)),o?e.directive("lazy",{bind:i.add.bind(i),update:i.update.bind(i),componentUpdated:i.lazyLoadHandler.bind(i),unbind:i.remove.bind(i)}):e.directive("lazy",{bind:i.lazyLoadHandler.bind(i),update:function(e,n){t(this.vm.$refs,this.vm.$els),i.add(this.el,{modifiers:this.modifiers||{},arg:this.arg,value:e,oldValue:n},{context:this.vm})},unbind:function(){i.remove(this.el)}})}};return x});