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"> <br/> <h1>导航栏使用下拉菜单</h1> <p>可以在导航栏上添加下拉菜单</p> <nav class="navbar navbar-expand-sm bg-dark navbar-dark"> <!-- Brand --> <a class="navbar-brand" href="#"> <img src="/static/icon/bootstrap_32x32.png" alt="Logo" style="width:32px;"> </a> <!-- Links --> <ul class="navbar-nav"> <li class="nav-item"> <a class="nav-link" href="#">Python</a> </li> <li class="nav-item"> <a class="nav-link" href="#">Perl</a> </li> <!-- Dropdown --> <li class="nav-item dropdown"> <a class="nav-link dropdown-toggle" href="#" id="navbardrop" data-toggle="dropdown"> Java </a> <div class="dropdown-menu"> <a class="dropdown-item" href="#">Servlet</a> <a class="dropdown-item" href="#">JSP</a> <a class="dropdown-item" href="#">Spring</a> </div> </li> </ul> </nav> </div>
运行结果：