html中切记ID不能重复

 1 <!DOCTYPE html>
 2 <html lang="zh">
 3 <head>
 4     <meta charset="UTF-8" />
 5     <meta name="viewport" content="width=device-width, initial-scale=1.0" />
 6     <meta http-equiv="X-UA-Compatible" content="ie=edge" />
 7     <title>html中切记ID不能重复</title>
 8 </head>
 9 <body>
10     <div id="add">
11         第一个触发事件
12     </div>
13     <div id="add">
14         第二个不触发事件
15     </div>
16     <script src="js/jquery-1.12.4.min.js" type="text/javascript" charset="utf-8"></script>
17     <script type="text/javascript">
18         $('#add').click(function(){
19             alert('113')
20         })
21     </script>
22 </body>
23 </html>