老师,我的问题出在哪里?

来源:4-10 自由编程

sunflower426

2020-09-10 11:32:50

<!DOCTYPE <!DOCTYPE html>

<html class="no-js">

    <head>

        <meta charset="utf-8">

        <meta http-equiv="X-UA-Compatible" content="IE=edge">

        <title>自由编程</title>

        <meta name="description" content="">

        <meta name="viewport" content="width=device-width, initial-scale=1">

        <link rel="stylesheet" href="">

        <style>

           .red{

               background:red;

           } 

        </style>

    </head>

    <body>

        <button>添加</button>

        <ul>

            <li>111</li>

            <li>222</li>

            <li>333</li>

            <li>444</li>

        </ul>

        <script src="https://cdn.bootcss.com/zepto/1.1.7/zepto.min.js"></script>

        <script>

        $(function(){

            var msg=444;

            $("button").click(function(){

                $("ul").append("<li></li>");

                $("li:last-child").text(mag+=111);

            });

            $("ul").delegate("li","mouseover",function(){

                $(this).addClass("red");

            })

            .delegate("li",mouseout,function(){

                $(this).removeClass("red");

            });

        });

        

        </script>

    </body>

</html>


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1回答

好帮手慕码

2020-09-10

同学你好,问题可参考下图:

http://img.mukewang.com/climg/5f59a1a609ade9db04710096.jpg

http://img.mukewang.com/climg/5f59a1bc092fba1f03630077.jpg

如果我的回答帮到了你,欢迎采纳,祝学习愉快~

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