Bootstrap基础导航栏(响应式导航菜单)

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">

    <link rel="stylesheet" href="../bootstrap-3.4.1-dist/css/bootstrap.min.css">
    <script src="../js/jquery.min.js"></script>
    <script src="../bootstrap-3.4.1-dist/js/bootstrap.min.js"></script>
    <title>Bootstrap基础导航栏(响应式导航菜单)</title>
</head>
<body>
   <nav class="navbar navbar-default" role="navigation">
       <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#navbar-collapse" aria-expanded="false">
           <span class="sr-only">Toggle Navigation</span>
           <span class="icon-bar"></span>
           <span class="icon-bar"></span>
           <span class="icon-bar"></span>
       </button>
       <!-- 这里可以定义品牌图标   role可访问，共享 -->
       <div class="navbar-header">
           <a href="#" class="navbar-brand" id="nav-brand-itheima">
               网站首页
           </a>
       </div>
       <div class="collapse navbar-collapse" id="navbar-collapse">
       <ul class="nav navbar-nav">
           <li class="active"><a href="##">系列教程</a></li>
           <li><a href="##">产品介绍</a></li>
           <li><a href="##">成功案例</a></li>
           <li><a href="##">关于我们</a></li>
       </ul>
       </div>
   </nav>
</body>
</html>

页面效果

点击右上角可以展开
浏览器界面大小不同形态不同

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