js仿小米手机上下滑动效果

时间:2020-05-15 秋天1014童话人气:0

本文实例为大家分享了js上下滑动效果的具体代码，供大家参考，具体内容如下

<!DOCTYPE html>
<html lang="en">
<head>
 <meta charset="UTF-8">
 <title>Document</title>
 <style>
 .box{
  width: 512px;
  height: 400px;
  margin:100px auto;
  overflow: hidden;
  position: relative;
  border: 1px solid red;
 }
 .box img{
  position: absolute;
  left: 0;
  top: 0;
 }
 .box div{
  width: 512px;
  height: 200px;
  position: absolute;
  left: 0;
 }
 .up{
  top:0;
 }
 .down{
  top: 200px;
 }
 </style>
 <script> 
 window.onload = function(){
 function $(id){ return document.getElementById(id);}
 var num = 0;
 var timer;
 var timer1;
 $("picup").onmouseover = function(){ //往下走
  timer = setInterval(function(){
  if(num>=0){
   clearInterval(timer);
  }else{
   num+=3;
   $("pic").style.top = num +"px";
  }
  },10);
 }
 $("picup").onmouseleave = function(){
  clearInterval(timer);
 }
 $("picdown").onmouseover = function(){ //往上走
  timer1 = setInterval(function(){
  if(num <= -1070){
   clearInterval(timer1);
  }else{
   num-=3;
   $("pic").style.top = num +"px";
  }
  },30);
 }
 $("picdown").onmouseleave = function(){
  clearInterval(timer1);
 }
 }
 </script>
</head>
<body>
 <div class="box">
 <img src="mi.png" alt="" id="pic">
 <div class="up" id="picup"></div>
 <div class="down" id="picdown"></div>
 </div>
</body>
</html>

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