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jquery implements the commonly used return to top effect on pages_jquery

WBOYOriginal: 2016-05-16 15:12:111625browse

The example in this article shares with you all the code for jquery to achieve the return to top effect for your reference. The specific content is as follows

Rendering:

Implementation code:

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>返回顶部</title>
  <style type="text/css">
     *{
       margin: 0;
       padding: 0;
     }
     .wrap{
       height: 2000px;
     }
     .gotop{
       display: block;
       width: 32px;
       height: 32px;
       background-color: red;
       text-align: center;
       text-decoration: none;
       font-size: 14px;
       font-weight: bold;
       color: white;
       line-height: 32px;
       position: fixed;
       right:50px;
       bottom:50px; 
       opacity: 0;
       /*top: 500px;*/
     }
  </style>
</head>
<body>
   <div class="wrap">
       <a href="###" class="gotop">TOP</a>
   </div>
   <script type="text/javascript" src="jquery-1.11.3.min.js"></script>
   <script type="text/javascript">
    $(function(){
         // 当滚动条滚动大于200时出现，未大于，消失
         $(window).scroll(function(){
           if($(document).scrollTop()<200){
             // alert("kk");
             $(".gotop").stop().animate({
               
                 opacity: 0
                 
             },1000)
           }
           else{
             $(".gotop").show().stop().animate({
                 
                 opacity: 1
                 
             },1000)
           }
        })
       // 返回顶部
       $(".gotop").on("click",function(){
          $("html body").animate({
             scrollTop:0
          },1000)
       })
    })
   </script>
</body>
</html>

I hope this article will be helpful to everyone learning JavaScript programming.

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