Bootstrap 导航栏下拉菜单和汉堡不起作用
[英]Bootstrap navbar dropdown and burger not working
问题描述
我在 boostrap 中创建了一个导航栏，但下拉菜单、汉堡等都不起作用。 我的意思是它们在点击时不会扩展。 我以前使用过 Bootstrap，过去没有遇到过这个问题。 我正在使用来自 CDN 的 Bootswatch，为了安全起见，我还在使用和不使用 Bootstrap CDN 进行测试后添加了 Bootstrap CDN，但我仍然没有注意到差异。
我正在使用 ejs 模板（这里没有显示），以防它对解决问题有用。 我只是希望我的代码采用任何人都可以测试的形式，而无需使用 ejs。
<html>
<head>
<meta charset=”UTF-8">
<meta name=”viewport” content=”width=device-width, initial-scale=1">
<!-- Katex latex renderer-->
<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/katex@0.10.0-rc.1/dist/katex.min.css" integrity="sha384-D+9gmBxUQogRLqvARvNLmA9hS2x//eK1FhVb9PiU86gmcrBrJAQT8okdJ4LMp2uv" crossorigin="anonymous">
<!-- The loading of KaTeX is deferred to speed up page rendering -->
<script defer src="https://cdn.jsdelivr.net/npm/katex@0.10.0-rc.1/dist/katex.min.js" integrity="sha384-483A6DwYfKeDa0Q52fJmxFXkcPCFfnXMoXblOkJ4JcA8zATN6Tm78UNL72AKk+0O" crossorigin="anonymous"></script>
<!-- To automatically render math in text elements, include the auto-render extension: -->
<script defer src="https://cdn.jsdelivr.net/npm/katex@0.10.0-rc.1/dist/contrib/auto-render.min.js" integrity="sha384-yACMu8JWxKzSp/C1YV86pzGiQ/l1YUfE8oPuahJQxzehAjEt2GiQuy/BIvl9KyeF" crossorigin="anonymous" onload="renderMathInElement(document.body);"></script>
<!-- Bootstrap -->
<link href="https://stackpath.bootstrapcdn.com/bootstrap/4.1.3/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-MCw98/SFnGE8fJT3GXwEOngsV7Zt27NXFoaoApmYm81iuXoPkFOJwJ8ERdknLPMO" crossorigin="anonymous">
<!-- Bootstrap JavaScript -->
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.1.3/js/bootstrap.min.js" integrity="sha384-ChfqqxuZUCnJSK3+MXmPNIyE6ZbWh2IMqE241rYiqJxyMiZ6OW/JmZQ5stwEULTy" crossorigin="anonymous"></script>
<!-- Bootstrap JavaScript -->
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.1.3/js/bootstrap.bundle.min.js" integrity="sha384-pjaaA8dDz/5BgdFUPX6M/9SUZv4d12SUPF0axWc+VRZkx5xU3daN+lYb49+Ax+Tl" crossorigin="anonymous"></script>
<script src="https://code.jquery.com/jquery-3.3.1.min.js" integrity="sha256-FgpCb/KJQlLNfOu91ta32o/NMZxltwRo8QtmkMRdAu8=" crossorigin="anonymous"></script>
<!-- Slate Bootswatch theme -->
<link href="https://stackpath.bootstrapcdn.com/bootswatch/4.1.3/slate/bootstrap.min.css" rel="stylesheet" integrity="sha384-ywjdn7N8uoxzIfGl7jlEBlqw2BNicOSzZDgo7A2ffvbM24Ct9plRp7KwtaIqZ33j" crossorigin="anonymous">
<title>title</title>
</head>
<body>
<nav class="navbar navbar-expand-lg navbar-dark bg-primary">
<div class="container">
<a class="navbar-brand" href="#">Navbar</a>
<button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarNav" aria-controls="navbarNav" aria-expanded="false" aria-label="Toggle navigation">
<span class="navbar-toggler-icon"></span>
</button>
<div class="collapse navbar-collapse" id="navbarNav">
<ul class="navbar-nav mr-auto">
<li class="nav-item">
<a class="nav-link" href="/index.ejs">Home</a>
</li>
<li class="dropdown">
<a class="dropdown-toggle" data-toggle="dropdown" href="#">Notes
<span class="caret"></span></a>
<ul class="dropdown-menu">
<li><a href="#">Lambda Calculus</a></li>
<li><a href="#">Languages and Machines</a></li>
<li><a href="#">Logic Programming</a></li>
<li><a href="#">Types and Programming languages</a></li>
</ul>
</li>
<li class="nav-item">
<a class="nav-link" href="/posts.ejs">Posts</a>
</li>
<li class="nav-item">
<a class="nav-link" href="/about.ejs">About</a>
</li>
</ul>
</div>
</div>
</nav>
<div class="container">
<div class="row bg-light">
<div class="col-md-auto text-dark">
<div id="notes">
<p>PAGE CONTENT</p>
</div>
</div>
</div>
</div>
<footer class="footer">
<div class="container">
<span class="text-muted">© Me. All external content belongs to their respective owners.</span>
</div>
</footer>
</body>
</html>
1 个解决方案
解决方案1
3 已采纳 2018-10-04 20:32:50
我建议您在<body>标签结束之前找到脚本标签。 您可以查看此链接以了解为什么更好。
此外，您在 Bootstrap 链接后加载 jQuery。 我修改了它。
<html> <head> <meta charset=”UTF-8"> <meta name=”viewport” content=”width=device-width, initial-scale=1"> <script src="https://code.jquery.com/jquery-3.3.1.min.js" integrity="sha256-FgpCb/KJQlLNfOu91ta32o/NMZxltwRo8QtmkMRdAu8=" crossorigin="anonymous"></script> <!-- Katex latex renderer--> <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/katex@0.10.0-rc.1/dist/katex.min.css" integrity="sha384-D+9gmBxUQogRLqvARvNLmA9hS2x//eK1FhVb9PiU86gmcrBrJAQT8okdJ4LMp2uv" crossorigin="anonymous"> <!-- The loading of KaTeX is deferred to speed up page rendering --> <script defer src="https://cdn.jsdelivr.net/npm/katex@0.10.0-rc.1/dist/katex.min.js" integrity="sha384-483A6DwYfKeDa0Q52fJmxFXkcPCFfnXMoXblOkJ4JcA8zATN6Tm78UNL72AKk+0O" crossorigin="anonymous"></script> <!-- To automatically render math in text elements, include the auto-render extension: --> <script defer src="https://cdn.jsdelivr.net/npm/katex@0.10.0-rc.1/dist/contrib/auto-render.min.js" integrity="sha384-yACMu8JWxKzSp/C1YV86pzGiQ/l1YUfE8oPuahJQxzehAjEt2GiQuy/BIvl9KyeF" crossorigin="anonymous" onload="renderMathInElement(document.body);"></script> <!-- Bootstrap --> <link href="https://stackpath.bootstrapcdn.com/bootstrap/4.1.3/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-MCw98/SFnGE8fJT3GXwEOngsV7Zt27NXFoaoApmYm81iuXoPkFOJwJ8ERdknLPMO" crossorigin="anonymous"> <!-- Bootstrap JavaScript --> <script src="https://stackpath.bootstrapcdn.com/bootstrap/4.1.3/js/bootstrap.min.js" integrity="sha384-ChfqqxuZUCnJSK3+MXmPNIyE6ZbWh2IMqE241rYiqJxyMiZ6OW/JmZQ5stwEULTy" crossorigin="anonymous"></script> <!-- Bootstrap JavaScript --> <script src="https://stackpath.bootstrapcdn.com/bootstrap/4.1.3/js/bootstrap.bundle.min.js" integrity="sha384-pjaaA8dDz/5BgdFUPX6M/9SUZv4d12SUPF0axWc+VRZkx5xU3daN+lYb49+Ax+Tl" crossorigin="anonymous"></script> <!-- Slate Bootswatch theme --> <link href="https://stackpath.bootstrapcdn.com/bootswatch/4.1.3/slate/bootstrap.min.css" rel="stylesheet" integrity="sha384-ywjdn7N8uoxzIfGl7jlEBlqw2BNicOSzZDgo7A2ffvbM24Ct9plRp7KwtaIqZ33j" crossorigin="anonymous"> <title>title</title> </head> <body> <nav class="navbar navbar-expand-lg navbar-dark bg-primary"> <div class="container"> <a class="navbar-brand" href="#">Navbar</a> <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarNav" aria-controls="navbarNav" aria-expanded="false" aria-label="Toggle navigation"> <span class="navbar-toggler-icon"></span> </button> <div class="collapse navbar-collapse" id="navbarNav"> <ul class="navbar-nav mr-auto"> <li class="nav-item"> <a class="nav-link" href="/index.ejs">Home</a> </li> <li class="dropdown"> <a class="dropdown-toggle" data-toggle="dropdown" href="#">Notes <span class="caret"></span></a> <ul class="dropdown-menu"> <li><a href="#">Lambda Calculus</a></li> <li><a href="#">Languages and Machines</a></li> <li><a href="#">Logic Programming</a></li> <li><a href="#">Types and Programming languages</a></li> </ul> </li> <li class="nav-item"> <a class="nav-link" href="/posts.ejs">Posts</a> </li> <li class="nav-item"> <a class="nav-link" href="/about.ejs">About</a> </li> </ul> </div> </div> </nav> <div class="container"> <div class="row bg-light"> <div class="col-md-auto text-dark"> <div id="notes"> <p>PAGE CONTENT</p> </div> </div> </div> </div> <footer class="footer"> <div class="container"> <span class="text-muted">© Me. All external content belongs to their respective owners.</span> </div> </footer> </body> </html>
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