源代码：
左右布局
点击运行
<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>开源教程(ossoft.cn)</title> <link rel="stylesheet" href="https://cdn.staticfile.org/twitter-bootstrap/3.3.7/css/bootstrap.min.css"> <script src="https://cdn.staticfile.org/jquery/2.1.1/jquery.min.js"></script> <script src="https://cdn.staticfile.org/twitter-bootstrap/3.3.7/js/bootstrap.min.js"></script> </head> <body> <div class="container"> <h2>实例</h2> <p> .close 类可以显示一个关闭按钮。</p> <button type="button" class="close"><span aria-hidden="true">x</span><span class="sr-only">关闭</span></button> </div> </body> </html>
运行结果