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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> <style> div { background: blue; color: white; height: 100px; width: 150px; } div.contextmenu { background: yellow; color: black; } </style> </head> <body> <div></div> <span>右键单击该块</span> <script> $(function () { var div = $( "div:first" ); div.contextmenu(function() { div.toggleClass( "contextmenu" ); }); }) </script> <footer>简单教程，简单编程<br/>Copyright © 简单教程 www.twle.cn</footer>
运行结果：