xxxxxxxxxx<html> <head> <meta name="viewport" content="width=device-width, initial-scale=1"> <link rel="stylesheet" href="//apps.bdimg.com/libs/bootstrap/3.3.0/css/bootstrap.min.css"> </head> <body> <div class="container"> <h2>按钮</h2> <p>.btn-block 类制作一个块级按钮(拉伸至父元素100%的宽度)：</p> <button type="button" class="btn btn-info btn-block">块级按钮</button> </div> <script src="//apps.bdimg.com/libs/jquery/2.1.1/jquery.min.js"></script> <script src="//apps.bdimg.com/libs/bootstrap/3.3.0/js/bootstrap.min.js"></script> </body></html>