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/3.3.7/css/bootstrap.min.css" rel="stylesheet"> <script src="https://cdn.bootcss.com/jquery/1.12.4/jquery.js"></script> <script src="https://cdn.bootcss.com/bootstrap/3.3.7/js/bootstrap.min.js"></script> <style>body {margin:20px}</style> <div class="alert alert-success alert-dismissable"> <button type="button" class="close" data-dismiss="alert" aria-hidden="true"> × </button> 成功！很好地完成了提交。 </div> <div class="alert alert-info alert-dismissable"> <button type="button" class="close" data-dismiss="alert" aria-hidden="true"> × </button> 信息！请注意这个信息。 </div> <div class="alert alert-warning alert-dismissable"> <button type="button" class="close" data-dismiss="alert" aria-hidden="true"> × </button> 警告！请不要提交。 </div> <div class="alert alert-danger alert-dismissable"> <button type="button" class="close" data-dismiss="alert" aria-hidden="true"> × </button> 错误！请进行一些更改 </div>
运行结果：