Bootstrap 汉堡菜单不折叠

Question

我在 Bootstrap 中建立一个站点，我的汉堡菜单没有崩溃。 这是 HTML 代码：

 <section> <div class="container-fluid main-banner"> <div class="row"> <div class="col-12"> <nav class="navbar navbar-expand-lg navbar-light bg-light main-nav"> <a class="navbar-brand" href="#"><img src="images/logo.png"></a> <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarSupportedContent" aria-controls="navbarSupportedContent" aria-expanded="false" aria-label="Toggle navigation"> <span class="custom-toggler" role="button" ><i class="fa fa-bars" aria-hidden="true"></i></span> </button> <div class="collapse navbar-collapse"> <ul class="navbar-nav ml-auto"> <li class="nav-item"> <a class="nav-link" href="#">Home</a> </li> <li class="nav-item"> <a class="nav-link" href="#">Our Culture</a> </li> <li class="nav-item"> <a class="nav-link" href="#">Our Curriculum</a> </li> <li class="nav-item"> <a class="nav-link" href="#">News</a> </li> <li class="nav-item"> <a class="nav-link see-through-button" href="#">Apply</a> </li> </ul> </div> </nav> </div> </div> <div class="row main-banner-text"> <div class="col-lg-6"> <h1>Know Your Greatness.</h1> <h3>Develop your passion and align your education with real world needs.</h3> <div class="top-padding"><a href="#" class="white-button">Your future starts now</a></div> </div> <div class="col-lg-6"></div> </div> </div> </section>

我会感谢任何反馈，因为我在这一点上非常难过。 我试过查看其他线程，但还没有找到任何东西。

Answer 1

您需要调用data-target="#navbarSupportedContent"中使用的 id 以显示隐藏导航栏 div 请检查以下代码

 <div class="collapse navbar-collapse" id="navbarSupportedContent">

 <meta name="viewport" content="width=device-width, initial-scale=1"> <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.5.0/css/bootstrap.min.css"> <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.5.1/jquery.min.js"></script> <script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.16.0/umd/popper.min.js"></script> <script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.5.0/js/bootstrap.min.js"></script><section> <div class="container-fluid main-banner"> <div class="row"> <div class="col-12"> <nav class="navbar navbar-expand-lg navbar-light bg-light main-nav"> <a class="navbar-brand" href="#"><img src="images/logo.png"></a> <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarSupportedContent" aria-controls="navbarSupportedContent" aria-expanded="false" aria-label="Toggle navigation"> <span class="custom-toggler" role="button" ><i class="fa fa-bars" aria-hidden="true"></i></span> </button> <div class="collapse navbar-collapse" id="navbarSupportedContent"> <ul class="navbar-nav ml-auto"> <li class="nav-item"> <a class="nav-link" href="#">Home</a> </li> <li class="nav-item"> <a class="nav-link" href="#">Our Culture</a> </li> <li class="nav-item"> <a class="nav-link" href="#">Our Curriculum</a> </li> <li class="nav-item"> <a class="nav-link" href="#">News</a> </li> <li class="nav-item"> <a class="nav-link see-through-button" href="#">Apply</a> </li> </ul> </div> </nav> </div> </div> <div class="row main-banner-text"> <div class="col-lg-6"> <h1>Know Your Greatness.</h1> <h3>Develop your passion and align your education with real world needs.</h3> <div class="top-padding"><a href="#" class="white-button">Your future starts now</a></div> </div> <div class="col-lg-6"></div> </div> </div> </section>