我是html和bootstrap的初学者，我尝试使用nav-bar项设置一个不错的dropdown。我目前正在审核http://getbootstrap.com/examples/navbar-fixed-top/中的nav-bar，但我的代码中未发生dropdown toggle：
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8"></meta>
<meta content="IE=edge" http-equiv="X-UA-Compatible"></meta>
<meta content="width=device-width, initial-scale=1" name="viewport"></meta>
<meta content="" name="description"></meta>
<meta content="" name="author"></meta>
<title>Baroum</title>
<link rel="stylesheet" href="./css/bootstrap.min.css"></link>
<link rel="stylesheet" href="./css/navbar-fixed-top.css"></link>
</head>
<body>
<nav class="navbar navbar-default navbar-fixed-top" role="navigation">
<div class="container">
<div class="navbar-header">
<button class="navbar-toggle collapsed" aria-controls="navbar" aria-expanded="false" data-target="#navbar" data-toggle="collapse" type="button">
<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="#">Baroum</a>
</div>
<div id="navbar" class="navbar-collapse collapse">
<ul class="nav navbar-nav">
<li class="active">
<a href="#">Home</a>
</li>
<li class="dropdown">
<a class="dropdown-toggle" aria-expanded="false" role="button" data-toggle="dropdown" href="#">
Dropdown
<span class="caret"></span>
</a>
<ul class="dropdown-menu" role="menu">
<li>
<a href="#">Action</a>
</li>
<li>
<a href="#">Another action</a>
</li>
<li>
<a href="#">Something else here</a>
</li>
<li class="divider"></li>
<li class="dropdown-header">
Nav header
</li>
<li>
<a href="#">Separated link</a>
</li>
<li>
<a href="#">One more separated link</a>
</li>
</ul>
</li>
</ul>
</div>
</div>
</nav>
<script src="./js/bootstrap.min.js"></script>
</body>
</html>
答案 0 :(得分：0)
尝试此代码，一切正常
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8"></meta>
<meta content="IE=edge" http-equiv="X-UA-Compatible"></meta>
<meta content="width=device-width, initial-scale=1" name="viewport"></meta>
<meta content="" name="description"></meta>
<meta content="" name="author"></meta>
<title>Baroum</title>
<link rel="stylesheet" href="//cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.1/css/bootstrap.min.css"></link>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<script src="//cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.1/js/bootstrap.min.js"></script>
</head>
<body>
<nav class="navbar navbar-default" role="navigation">
<div class="container-fluid">
<!-- Brand and toggle get grouped for better mobile display -->
<div class="navbar-header">
<button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#bs-example-navbar-collapse-1">
<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="#">Brand</a>
</div>
<!-- Collect the nav links, forms, and other content for toggling -->
<div class="collapse navbar-collapse" id="bs-example-navbar-collapse-1">
<ul class="nav navbar-nav">
<li class="active"><a href="#">Link <span class="sr-only">(current)</span></a></li>
<li><a href="#">Link</a></li>
<li class="dropdown">
<a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" aria-expanded="false">Dropdown <span class="caret"></span></a>
<ul class="dropdown-menu" role="menu">
<li><a href="#">Action</a></li>
<li><a href="#">Another action</a></li>
<li><a href="#">Something else here</a></li>
<li class="divider"></li>
<li><a href="#">Separated link</a></li>
<li class="divider"></li>
<li><a href="#">One more separated link</a></li>
</ul>
</li>
</ul>
<form class="navbar-form navbar-left" role="search">
<div class="form-group">
<input type="text" class="form-control" placeholder="Search">
</div>
<button type="submit" class="btn btn-default">Submit</button>
</form>
<ul class="nav navbar-nav navbar-right">
<li><a href="#">Link</a></li>
<li class="dropdown">
<a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" aria-expanded="false">Dropdown <span class="caret"></span></a>
<ul class="dropdown-menu" role="menu">
<li><a href="#">Action</a></li>
<li><a href="#">Another action</a></li>
<li><a href="#">Something else here</a></li>
<li class="divider"></li>
<li><a href="#">Separated link</a></li>
</ul>
</li>
</ul>
</div><!-- /.navbar-collapse -->
</div><!-- /.container-fluid -->
</nav>
</body>
</html>
答案 1 :(得分：0)
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8" />
<title>Bootstrap, from Twitter</title>
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<meta name="description" content="" />
<meta name="author" content="" />
<!-- Le styles -->
<link data-require="bootstrap-css" data-semver="3.2.0" rel="stylesheet" href="//maxcdn.bootstrapcdn.com/bootstrap/3.2.0/css/bootstrap.min.css" />
<link data-require="bootstrap@*" data-semver="3.2.0" rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.2.0/css/bootstrap.css" />
<style>
body {
padding-top: 60px;
}
@media (max-width: 979px) {
/* Remove any padding from the body */
body {
padding-top: 0;
}
}
</style>
<link href="style.css" rel="stylesheet" />
<!-- Le HTML5 shim, for IE6-8 support of HTML5 elements -->
<!--[if lt IE 9]>
<script src="//html5shim.googlecode.com/svn/trunk/html5.js"></script>
<![endif]-->
<!-- Le fav and touch icons -->
<link rel="shortcut icon" href="images/favicon.ico" />
<link rel="apple-touch-icon" href="images/apple-touch-icon.png" />
<link rel="apple-touch-icon" sizes="72x72" href="images/apple-touch-icon-72x72.png" />
<link rel="apple-touch-icon" sizes="114x114" href="images/apple-touch-icon-114x114.png" />
<!-- Le javascript
================================================== -->
<script data-require="jquery" data-semver="2.1.1" src="//cdnjs.cloudflare.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script data-require="bootstrap" data-semver="3.2.0" src="https://maxcdn.bootstrapcdn.com/bootstrap/3.2.0/js/bootstrap.js"></script>
<script src="script.js"></script>
</head>
<body>
<nav class="navbar navbar-default navbar-fixed-top" role="navigation">
<div class="container">
<div class="navbar-header">
<button class="navbar-toggle collapsed" aria-controls="navbar" aria-expanded="false" data-target="#navbar" data-toggle="collapse" type="button">
<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="#">Baroum</a>
</div>
<div id="navbar" class="navbar-collapse collapse">
<ul class="nav navbar-nav">
<li class="active">
<a href="#">Home</a>
</li>
<li class="dropdown">
<a class="dropdown-toggle" aria-expanded="false" role="button" data-toggle="dropdown" href="#">
Dropdown
<span class="caret"></span>
</a>
<ul class="dropdown-menu" role="menu">
<li>
<a href="#">Action</a>
</li>
<li>
<a href="#">Another action</a>
</li>
<li>
<a href="#">Something else here</a>
</li>
<li class="divider"></li>
<li class="dropdown-header">
Nav header
</li>
<li>
<a href="#">Separated link</a>
</li>
<li>
<a href="#">One more separated link</a>
</li>
</ul>
</li>
</ul>
</div>
</div>
</nav>
</html>
你可以在plunker上检查这个代码是否正常工作。