1 <html lang="en">
2 <head>
3 <meta charset="UTF-8">
4 <meta name="viewport" content="width=device-width, initial-scale=1.0">
5 <meta http-equiv="X-UA-Compatible" content="ie=edge">
6 <title></title>
7 <script src="js/jquery-3.3.1.js"></script>
8 </head>
9 <body>
10 <p>新年快乐</p>
11 <button class="btn" id="btn">点我啊</button>
12 <script>
13 /* window.onload=function(){
14 $("#btn").on('click',function(){
15 $("p").html("我是一只猫")
16 })
17 }*/
18 $(function(){
19 alert(0)
20 })
21 </script>
22 </body>
23 </html>
