由于某种原因，我的 Bootstrap 汉堡菜单出现了问题。菜单在小屏幕上显示得很好，但单击时菜单不会展开。
我继续添加了完整的代码，看看是否有帮助。
这是我的代码:
<!DOCTYPE html>
<html>
<meta name="viewport" content="initial-scale = 1.0,maximum-scale = 1.0" />
<head>
<title> TopMusicFestivals </title>
<script src="https://code.jquery.com/jquery-git2.min.js"></script>
<link rel= "stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css">
<!--Connecting CSS-->
<link rel= "stylesheet" href = "/stylesheets/main.css">
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/font-awesome/4.5.0/css/font-awesome.min.css">
</head>
<body>
<nav class="navbar navbar-inverse navbar-fixed-top">
<div class="container-fluid">
<div class="navbar-header">
<button type="button" class="navbar-toggle collapsed" data-toggle="collapse" href="#collapse1" data-target="#navbar" aria-expanded="false" aria-controls="navbar">
<span class="sr-only">Toggle navigation</span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
</button>
<a class="navbar-brand" href="/">TMF</a>
</div>
<div id="navbar" class="collapse navbar-collapse" data-target="#collapse1">
<ul class="nav navbar-nav">
<li class="active"><a href="#">Home</a></li>
<li><a href="#about">About</a></li>
<li><a href="#contact">Contact</a></li>
</ul>
<ul class="nav navbar-nav navbar-right">
<!--The if statemnet below along with the currentUser varriable is how we're passing the user name into the navbar-->
<% if(!currentUser){ %>
<li> <a href="/login"> Login </a></li>
<li> <a href="/register"> Sign Up </a></li>
<% } else{ %>
<li> <a href ="#">Signed In As: <%= currentUser.username%> </a></li>
<li> <a href="/logout"> Log Out </a></li>
<% } %>
</ul>
</div>
</div>
</nav>
<!--==============-->
最佳答案
如果汉堡菜单显示在较小的屏幕上，但没有展开，则可能是 Bootstrap JS 和 JQuery 文件未正确加载。只需将以下脚本添加到您的代码中即可。
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.4/jquery.min.js"></script>
<script src="http://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/js/bootstrap.min.js"></script>
关于jquery - Bootstrap 汉堡菜单不起作用，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/38189481/