2-7请老师过目

来源：2-7 编程练习

qq_鸭绿桥第一帅哥_0

2019-02-09 21:37:10

<!DOCTYPE html>
<html>

<head>
    <meta charset="utf-8">
    <title>习题</title>
    <style>
      .big{
        color: red;
        font-size: 50px;
      }
    </style>
</head>

<body>
    <ul>
        <li>1</li>
        <li>2</li>
        <li>3</li>
        <li>4</li>
    </ul>
    <script src="https://cdn.bootcss.com/jquery/3.3.1/jquery.js"></script>
    <script>
    //此处写代码
       $('li').hover(function(){
          $(this).addClass('big');
       },function(){
          $(this).removeClass('big');
       })
    </script>
</body>

</html>

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