jQuery课堂练习：制作QQ简易聊天框——全代码

&lt;!DOCTYPE html&gt;
&lt;html lang="en"&gt;
&lt;head&gt;
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>QQ简易聊天框</title>
    <link rel="stylesheet" href="style.css">
</head>
<script src="D:大二上jquery3.6.1.js"></script>
<script>
    $(function(){
    var touxiang=new Array("../QQ简易聊天框/images/head01.jpg","../QQ简易聊天框/images/head02.jpg","../QQ简易聊天框/images/head03.jpg");
    var names=new Array("哈哈哈","333","111");
    $("#send").click(function(){
        if($(".text").val().length>0){ //获取元素值的长度，若大于0（有内容），则输出
            var lt=$(".neirong").html();//获取聊天内容
            var tn=Math.floor(Math.random()*3);//随机获取头像和昵称
            var stouxiang="<div><img src="+touxiang[tn]+"></div>";//设置头像
            var name="<p style='color: red; font-size: 12px;'>"+names[tn]+"</p>"; //设置昵称
            var neirong="<div>"+$(".text").val()+"</div>";    //修饰当前输入的内容
            var zong="<section>"+stouxiang+name+neirong+"</section>"; //获取聊天的头像、昵称和内容
            $(".neirong").html(lt+zong);
            $(".text").val("");//清除文本框中的内容
        }
    });
})
</script>
<body>
    <section id="chat">
        <div class="neirong"></div>
        <div><img src="../QQ简易聊天框/images/icon.jpg"></div>
        <textarea class="text"></textarea>
        <div class="btn"><span>关闭(C)</span><span id="send">发送(S)</span></div>
    </section>
</body>
</html>

下面是css代码块

*{margin: 0; padding: 0; line-height: 22px; font-family: "Arial", "微软雅黑";}
#chat{margin: 3px auto 0 auto; width:436px; border: 1px #999999 solid;}
.neirong{width: 100%; height: 220px; overflow:auto;}
.text{border: none; width: 100%; height: 50px;}
.btn{text-align: right;}
.btn span{display: inline-block; padding: 0 10px; height: 25px;
    overflow: hidden; color: #ffffff; border-radius: 5px; background-color: #069dd5; font-size: 12px; margin-right: 3px; cursor:pointer;}