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源代码：
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<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>Bootstrap 实例 - 按钮激活状态</title> <link href="//cdn.staticfile.net/twitter-bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet"> <script src="//cdn.staticfile.net/jquery/2.1.1/jquery.min.js"></script> <script src="//cdn.staticfile.net/twitter-bootstrap/3.3.7/js/bootstrap.min.js"></script> </head> <body> <p> <button class="btn btn-default btn-lg " type="button">默认按钮</button> <button class="btn btn-default btn-lg active" type="button">激活按钮</button> </p> <p> <button class="btn btn-primary btn-lg " type="button">原始按钮</button> <button class="btn btn-primary btn-lg active" type="button">激活的原始按钮</button> </p> </body> </html>
运行结果