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"> <h2>内嵌按钮组</h2> <p>按钮组设置下拉菜单</p> <div class="btn-group"> <button type="button" class="btn btn-primary">Python</button> <button type="button" class="btn btn-primary">PHP</button> <div class="btn-group"> <button type="button" class="btn btn-primary dropdown-toggle" data-toggle="dropdown"> JAVA </button> <div class="dropdown-menu"> <a class="dropdown-item" href="#">Servlet 3</a> <a class="dropdown-item" href="#">JSP</a> </div> </div> </div> </div>
运行结果：