                        课程
                    
                        /前端开发
                        
                            /JavaScript
                        
                        /JS动画效果

如何将更改透明度和变换高度同时作用在\多物体运动\上，求各位大神帮帮忙，看我哪里错了

请问JS部分应该怎么改？

superli18

2016-09-25

源自：JS动画效果 4-1

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4 回答

半桶水的好人
2016-11-04

<!doctype html>
<html>
<head>
<meta charset="UTF-8">
<meta name="Generator" content="EditPlus®">
<meta name="Author" content="">
<meta name="Keywords" content="">
<meta name="Description" content="">
<title>Document</title>
<style type="text/css">
   * {
       margin:0;
       padding:0;
   }
   ul li{
       width:200px;
       height:100px;
       background:yellow;
       list-style:none;
       margin-top:20px;
       filter:alpha(opacity:30);
       opacity:0.3;
   }
</style>
<script type="text/javascript">
   window.onload=function(){
       var lis=document.getElementsByTagName("li");
       //var timer=null;
       for(var i=0;i<lis.length;i++){
           lis[i].alpha=30;
           lis[i].timer=null;
           lis[i].onmouseover=function(){
               showMove(this,400,100);
           }
           lis[i].onmouseout=function(){
               showMove(this,200,30);
           }
       }
       function showMove(obj,target1,target2){
           clearInterval(obj.timer);
           obj.timer=setInterval(function(){
               var sheed=(target1-obj.offsetWidth)/10;
               if(sheed>0){
                   sheed=Math.ceil(sheed);
               }else {
                   sheed=Math.floor(sheed);
               }
               var sheed2=0;
               if(obj.alpha>target2){
                   sheed2=-5;
               }else{
                   sheed2=5
               }
               if(obj.alpha == target2 && target1 == obj.offsetWidth){
                   clearInterval(obj.timer);
               }else{
                   obj.alpha+=sheed2;
                   obj.style.filter="alpha(opacity:"+obj.alpha+")";
                   obj.style.opacity=obj.alpha/100;
                   obj.style.width=obj.offsetWidth+sheed+"px";
               }
           },30)
       }
   }
</script>
</head>
<body>
<ul>
   <li></li>
   <li></li>
   <li></li>
</ul>
</body>
</html>