Js上卷上拉

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<!DOCTYPE html> <html> <head>

   <meta charset="utf-8">
   <meta http-equiv="X-UA-Compatible" content="IE=edge">
   <title>上卷下拉</title>
   <link rel="stylesheet" href="">
   <script src="js/jquery.min.js"></script>
   <style>
       .box{
           width:500px;
           height:400px;
           background-color: orange;
       }
   </style>
   <script>
       $(function(){
           $(".up").click(function(){
               $(".box").slideUp(5000,"linear",function(){
                   alert("动画执行完毕")
               });
           })
           $(".down").click(function(){
               $(".box").slideDown("fast");//slow 600ms 默认400ms fast 200ms
           });
           $(".toggle").click(function(){
               $(".box").slideToggle(2000)
           })
       })
   </script>

</head> <body> <button class="up">上卷</button> <button class="down">下拉</button> <button class="toggle">切换</button>

</body> </html>