简单教程
提交运行
代码编辑器:
<!DOCTYPE html> <meta charset="utf-8"> <link href="/static/next/css/tryit.css?v=2017082407" rel="stylesheet"/> <script src="https://cdn.staticfile.org/jquery/2.2.4/jquery.min.js"></script> <script> $(document).ready(function(){ $("button").click(function(){ alert($("li").size()); }); }); </script> <button>输出li元素的数量</button> <ul> <li>Coffee</li> <li>Milk</li> <li>Soda</li> </ul> <footer>简单教程,简单编程<br/>Copyright © 简单教程 www.twle.cn</footer>
运行结果: