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<!DOCTYPE html> <html> <head> <title>Bootstrap5 实例</title> <meta charset="utf-8"> <meta name="viewport" content="width=device-width, initial-scale=1"> <link href="https://cdn.staticfile.org/twitter-bootstrap/5.1.1/css/bootstrap.min.css" rel="stylesheet"> <script src="https://cdn.staticfile.org/twitter-bootstrap/5.1.1/js/bootstrap.bundle.min.js"></script> </head> <body> <nav class="navbar navbar-expand-md bg-dark navbar-dark"> <!-- Brand --> <a class="navbar-brand" href="#">Navbar</a> <!-- Toggler/collapsibe Button --> <button class="navbar-toggler" type="button" data-bs-toggle="collapse" data-bs-target="#collapsibleNavbar"> <span class="navbar-toggler-icon"></span> </button> <!-- Navbar links --> <div class="collapse navbar-collapse" id="collapsibleNavbar"> <ul class="navbar-nav"> <li class="nav-item"> <a class="nav-link" href="#">Link</a> </li> <li class="nav-item"> <a class="nav-link" href="#">Link</a> </li> <li class="nav-item"> <a class="nav-link" href="#">Link</a> </li> </ul> </div> </nav> <br> <div class="container"> <h3>折叠导航栏</h3> <p>通常，小屏幕上我们都会折叠导航栏，通过点击来显示导航选项。</p> <p>提示: 如果你删除 .navbar-expand-md 类，导航链接会一直隐藏，且切换按钮会一直显示。</p> </div> </body> </html>
运行结果：