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<!doctype html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0"> <meta http-equiv="X-UA-Compatible" content="ie=edge"> <title>jquery toggle class 使用函数来切换类</title> <script src="//cdn.staticfile.org/jquery/2.0.3/jquery.min.js"></script> <script type="text/javascript"> $(document).ready(function(){ $("button").click(function(){ $('ul li').toggleClass(function(){ return 'listitem_' + $(this).index(); }); }); }); </script> <style type="text/css"> .listitem_1, .listitem_3{ color:red;} .listitem_0, .listitem_2{ color:blue;} </style> </head> <body> <h1 id="h1">This is a heading</h1> <ul> <li>Apple</li> <li>IBM</li> <li>Microsoft</li> <li>Google</li> </ul> <button class="btn1">添加或移除列表项的类</button> </body> </html>
运行结果