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codesman/readyLoadImg

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readyLoadImg.min.js 3.09 KB
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WittBulter 提交于 2016-01-05 14:32 . min Update
;(function(w,d){var _old=w.readyLoadImg;if(typeof module==="object"){module.exports=function(){return readyLoadImg(w)};return}readyLoadImg(w,d);function readyLoadImg(w,d){var RLI=function(attrName,srcName,timeOut){this.attrName=attrName?'':'load-img';this.srcName=srcName?'':'-min';this.time=timeOut?timeOut:100;this.imageList=[];this.bgList=[];this.url='';this.img=d.getElementsByTagName('img');this.background=false;_this=this},getBackGround=function(attrName){var list=[];var nodes=document.getElementsByTagName('*'),length=nodes.length;for(var i=0;i<length;i++){if(nodes[i].getAttribute(attrName)!=null){if(nodes[i].tagName!='IMG'){list.push(nodes[i])}}}return list},setImage=function(url,img,list,bg){var timeOut=setTimeout(function(){var time=setInterval(function(){if(img[img.length-1].complete){for(var i=0;i<img.length;i++){if(bg){return list[i].style.backgroundImage='url('+url[i]+')'}list[i].setAttribute('src',url[i])}w.clearInterval(time);w.clearTimeout(timeOut)}},300)},_this.time)};RLI.prototype={version:'0.0.1',bgToggle:function(toggle){this.background=toggle},getMin:function(){var _loadList=[],_bgList=[],_bgUrlList=[];var style;if(this.background){_bgList=getBackGround(this.attrName);for(var i=0;i<_bgList.length;i++){style=d.defaultView.getComputedStyle(_bgList[i])['backgroundImage'];if(style&&style.length>6){if(style.split('"')[1]&&style.split('"')[1].indexOf(this.srcName)>=0){this.bgList.push(_bgList[i]);_bgUrlList.push(style.split('"')[1].split(this.srcName)[0]+style.split('"')[1].split(this.srcName)[1])}}}}for(var i=0;i<this.img.length;i++){if(this.img[i].getAttribute(this.attrName)!=null){this.url=this.img[i].getAttribute('src');if(this.url&&this.url.length>0&&this.url.indexOf(this.srcName)>=0){this.imageList.push(this.img[i]);_loadList.push(this.url.split(this.srcName)[0]+this.url.split(this.srcName)[1])}}}return[_loadList,_bgUrlList]},preLoad:function(arr){var _img=[];if(typeof arr=='object'){if(typeof arr[0]=='object'){arr.forEach(function(value,index){_img[index]=new Image();_img[index].src=value.url})return _img}arr.forEach(function(value,index){_img[index]=new Image();_img[index].src=value})return _img}},start:function(){w.onload=function(){var url=_this.getMin();if(_this.background&&url[1]&&url[1].length>=1){img=_this.preLoad(url[1]);setImage(url[1],img,_this.bgList,true)}if(!_this.background&&url[0]&&url[0].length>=1){img=_this.preLoad(url[0]);setImage(url[0],img,_this.imageList)}}},delay:function(setTime){var _loadList=[],_image=[],_imagePre=[];setTime?'':setTime=2000;for(var i=0;i<this.img.length;i++){if(this.img[i].getAttribute('delay-img')!=null){this.url=this.img[i].getAttribute('src');this.img[i].setAttribute('src','');_image.push(this.img[i]);_loadList.push(this.url)}}var timeOut=setTimeout(function(){_imagePre=_this.preLoad(_loadList);var time=setInterval(function(){if(_imagePre[_imagePre.length-1].complete){for(var i=0;i<_image.length;i++){_image[i].setAttribute('src',_loadList[i])}w.clearInterval(time);w.clearTimeout(timeOut)}},300)},setTime)},old:_old};if(typeof define==="function"&&define.amd){define('readyLoadImg',[],function(){return RLI})}w.readyLoadImg=RLI}})(window,document);
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