我无法让移动下拉菜单在这个导航栏上工作，我有所有需要的文件，但它仍然不允许任何元素下拉(在移动 View 中？)
有什么东西是我看不见的吗
<div class="navbar navbar-default navbar-fixed-top">
<div class="container">
<div class="navbar-header">
<button class="navbar-toggle" type="button" data-toggle="collapse" data-target="navbar-main">
<span class="icon-bar"></span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
</button>
<a class="navbar-brand" href="/" style="background-color: lightgrey;">Site</a>
</div>
<div class="navbar-collapse collapse" id="navbar-main">
<ul class="nav navbar-nav">
<li><a href="#">Site</a>
</li>
<li><a href="#">Rules</a>
</li>
<li><a href="#">Results</a>
</li>
<li><a href="#">Contact</a>
</li>
<li><a href="#">Request Account</a>
</li>
</ul>
<form class="navbar-form navbar-right" role="search">
<div class="form-group">
<input type="text" class="form-control" name="username" placeholder="Username">
</div>
<div class="form-group">
<input type="password" class="form-control" name="password" placeholder="Password">
</div>
<button type="submit" class="btn btn-default">Sign In</button>
</form>
</div>
</div>
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Site</title>
<link rel="stylesheet" href="//netdna.bootstrapcdn.com/font-awesome/4.2.0/css/font-awesome.min.css">
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" integrity="sha384-BVYiiSIFeK1dGmJRAkycuHAHRg32OmUcww7on3RYdg4Va+PmSTsz/K68vbdEjh4u" crossorigin="anonymous">
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap-theme.min.css" integrity="sha384-rHyoN1iRsVXV4nD0JutlnGaslCJuC7uwjduW9SVrLvRYooPp2bWYgmgJQIXwl/Sp" crossorigin="anonymous">
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js" integrity="sha384-Tc5IQib027qvyjSMfHjOMaLkfuWVxZxUPnCJA7l2mCWNIpG9mGCD8wGNIcPD7Txa" crossorigin="anonymous"></script>
<script src="https://code.jquery.com/jquery-3.1.1.js" integrity="sha256-16cdPddA6VdVInumRGo6IbivbERE8p7CQR3HzTBuELA=" crossorigin="anonymous"></script>
</head>
<body>
@include('layouts.header')
@include('layouts.footer')
</body>
</html>
最佳答案
您只是在 data-target 值中缺少了 #。 CodePen
<button class="navbar-toggle" type="button" data-toggle="collapse" data-target="#navbar-main">
关于javascript - Bootstrap 移动下拉菜单，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/40556010/