简单教程
提交运行
代码编辑器：
<!DOCTYPE htm> <meta charset="utf-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <link href="https://cdn.bootcss.com/bootstrap/2.3.2/css/bootstrap.min.css" rel="stylesheet"> <style>body{margin:20px;}</style> <div class="alert alert-block"> <a class="close" data-dismiss="alert">×</a> <h4 class="alert-heading">Warning!</h4> What are you doing?! this will delete all files!! </div> <script src="/static/lib/bootstrap/2.3.2/docs/assets/js/jquery.js"></script> <script src="/static/lib/bootstrap/2.3.2/docs/assets/js/bootstrap.min.js"></script>
运行结果：