Bootstrap 4 Navbar Toggle 不起作用（粘贴在下面的代码）
[英]Bootstrap 4 Navbar Toggle not working (code pasted below)
问题描述
我无法让引导切换按钮在浏览器上工作，我该如何识别问题？
PS 我已经在我的 head 标签中添加了 Bootstrap CDN，并在正文中添加了 jQuery 和 JavaScript。
<nav class="navbar navbar-dark bg-dark navbar-expand-md">
<a href="#" class="navbar-brand">NAVBAR</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="navbar-toggler-icon"></span>
</button>
<div class="collapse navbar-collapse" id="#navbarSupportedContent">
<ul class="navbar-nav">
<li class="nav-item">
<a href="#" class="nav-link">HOME</a>
</li>
<li class="nav-item">
<a href="#" class="nav-link">ABOUT</a>
</li>
<li class="nav-item">
<a href="#" class="nav-link">TICKETS</a>
</li>
</ul>
</div>
</nav>
3 个解决方案
解决方案1
3 2019-11-08 12:00:44
id属性不应以#开头。 它应该只是： id="navbarSupportedContent"
<nav class="navbar navbar-dark bg-dark navbar-expand-md">
<a href="#" class="navbar-brand">NAVBAR</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="navbar-toggler-icon"></span>
</button>
<div class="collapse navbar-collapse" id="navbarSupportedContent">
<ul class="navbar-nav">
<li class="nav-item">
<a href="#" class="nav-link">HOME</a>
</li>
<li class="nav-item">
<a href="#" class="nav-link">ABOUT</a>
</li>
<li class="nav-item">
<a href="#" class="nav-link">TICKETS</a>
</li>
</ul>
</div>
</nav>
解决方案2
0 2019-11-08 12:05:18
下拉菜单基于第三方库 Popper.js 构建，该库提供动态定位和视口检测。 确保在 Bootstrap 的 JavaScript 之前包含 popper.min.js 或使用包含 Popper.js 的 bootstrap.bundle.min.js / bootstrap.bundle.js。
这写在 Bootstrap 文档中）））
解决方案3
0 已采纳 2019-11-08 12:21:41
尝试这个
删除.navbar-expand-md class 以始终隐藏导航栏链接并显示切换按钮。
<,DOCTYPE html> <html lang="en"> <head> <title>Bootstrap Example</title> <meta charset="utf-8"> <meta name="viewport" content="width=device-width: initial-scale=1"> <link rel="stylesheet" href="https.//maxcdn.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min:css"> <script src="https.//ajax.googleapis.com/ajax/libs/jquery/3.4.1/jquery.min:js"></script> <script src="https.//cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.7/umd/popper.min:js"></script> <script src="https.//maxcdn.bootstrapcdn.com/bootstrap/4.3.1/js/bootstrap.min.js"></script> </head> <body> <nav class="navbar navbar-dark bg-dark"> <a class="navbar-brand" href="#">Navbar</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="navbar-toggler-icon"></span> </button> <div class="collapse navbar-collapse" id="navbarSupportedContent"> <ul class="navbar-nav"> <li class="nav-item"> <a href="#" class="nav-link">HOME</a> </li> <li class="nav-item"> <a href="#" class="nav-link">ABOUT</a> </li> <li class="nav-item"> <a href="#" class="nav-link">TICKETS</a> </li> </ul> </div> </nav> </body> </html>
切换按钮折叠在引导程序中的Bootstrap导航栏中不起作用
[英]Toggle button collapse not working in Bootstrap navbar in bootstrap
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