简单教程
提交运行
代码编辑器：
<meta name="viewport" content="width=device-width, initial-scale=1"> <link rel="stylesheet" href="/static/lib/bootstrap/4.0.0/css/bootstrap.min.css"> <script src="/static/lib/jquery/3.3.1/jquery.min.js"></script> <script src="/static/lib/popper.js/1.12.9/umd/popper.min.js"></script> <script src="/static/lib/bootstrap/4.0.0/js/bootstrap.min.js"></script> <div class="container"> <h1>设置下拉菜单中的标签</h1> <p>使用 .dropdown-header 可以在下拉菜单中添加标签</p> <div class="dropdown"> <button type="button" class="btn btn-primary dropdown-toggle" data-toggle="dropdown">Java </button> <div class="dropdown-menu"> <h5 class="dropdown-header">Java Web</h5> <a class="dropdown-item" href="#">JSP</a> <a class="dropdown-item" href="#">Servlet</a> <a class="dropdown-item" href="#">Spring</a> <h5 class="dropdown-header">APP</h5> <a class="dropdown-item" href="#">Android</a> </div> </div> </div>
运行结果：