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" style="margin:0 100px"> <h1>右对齐的下拉菜单</h1> <p>想让下拉菜单右对齐，可以在 .dropdown-menu 元素上添加 .dropdown-menu-right</p> <div class="dropdown"> <button type="button" class="btn btn-primary dropdown-toggle" data-toggle="dropdown">Java</button> <div class="dropdown-menu dropdown-menu-right"> <a class="dropdown-item" href="#">Servlet</a> <a class="dropdown-item" href="#">JSP</a> <a class="dropdown-item" href="#">Spring</a> </div> </div> </div>
运行结果：