<!DOCTYPE html>
<html>
    <head>
        <meta charset="utf-8">
        <title></title>
        <!-- CSS -->
        <!-- 最新版本的 Bootstrap 核心 CSS 文件 -->
        <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/3.4.1/css/bootstrap.min.css" integrity="sha384-HSMxcRTRxnN+Bdg0JdbxYKrThecOKuH5zCYotlSAcp1+c8xmyTe9GYg1l9a69psu" crossorigin="anonymous">
        <style type="text/css">
            h4{
                margin: 40px 0 10px;
            }
            .nav-tabs{
                margin-bottom: 15px;
            }
        </style>
    </head>
    <body>
        <div class="container">
            <h4>Tabs</h4>
            <ul id="myTab" class="nav nav-tabs">
                <li class="active"><a href="#home" data-toggle="tab">Home</a></li>
                <li><a href="#myhome" data-toggle="tab">myHome</a></li>
                <li class="dropdown">
                    <a href="#" id="myTbaDrop1" class="dropdown-toggle" data-toggle="dropdown">
                        DropDown <b class="caret"></b>
                    </a>
                    <ul class="dropdown-menu" role="menu" aria-labelledby="myTabDrop1">
                        <li><a href="#fat" tabindex="-1" data-toggle="tab">@fat</a></li>
                        <li><a href="#mdo" tabindex="-1" data-toggle="tab">@mdo</a></li>
                    </ul>
                </li>
            </ul>
            <div id="myTabContent" class="tab-content">
                <div class="tab-pane active" id="home">
                    <p>1asdadfasddasdsad</p>
                </div>
                <div class="tab-pane " id="myhome">
                    <p>3asdadfasddasdsad</p>
                </div>
                <div class="tab-pane " id="fat">
                    <p>4asdadfasddasdsad</p>
                </div>
                <div class="tab-pane " id="mdo">
                    <p>5asdadfasddasdsad</p>
                </div>
            </div>
        </div>
        
        
        
        
        
        <!-- jQuery and JavaScript Bundle with Popper -->
        <script src="https://cdn.jsdelivr.net/npm/jquery@3.5.1/dist/jquery.slim.min.js" integrity="sha384-DfXdz2htPH0lsSSs5nCTpuj/zy4C+OGpamoFVy38MVBnE+IbbVYUew+OrCXaRkfj" crossorigin="anonymous"></script>
        <script src="https://stackpath.bootstrapcdn.com/bootstrap/3.4.1/js/bootstrap.min.js" integrity="sha384-aJ21OjlMXNL5UyIl/XNwTMqvzeRMZH2w8c5cRVpzpU8Y5bApTppSuUkhZXN0VxHd" crossorigin="anonymous"></script>
    </body>
</html>