1 <!DOCTYPE html>
2 <html lang="en">
3
4 <head>
5 <meta charset="UTF-8">
6 <meta http-equiv="X-UA-Compatible" content="IE=edge">
7 <meta name="viewport" content="width=device-width, initial-scale=1.0">
8 <title>Document</title>
9 </head>
10
11 <body onl oad="ready()">
12 <script>
13 window.onload = function () {
14 document.getElementById("btn").onclick = function () {
15 alert("hello js");
16 }
17 }
18 </script>
19 <input type="button" value="按钮" id="btn">
20 </body>
21
22 </html>
标签：function,onload,顺序,代码,javsscript,btn From： https://www.cnblogs.com/2018jason/p/17156762.html