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> <h3>标签</h3> <p>.label 类放置在不同的元素中（自适应大小）</p> <h1>一号标题 <span class="label label-info">Label</span></h1> <h2>二号标题 <span class="label label-info">Label</span></h2> <h3>三号标题 <span class="label label-info">Label</span></h3> <h4>四号标题 <span class="label label-info">Label</span></h4>
运行结果：