为什么下拉菜单出不来，浏览器窗口缩小之后点击右侧的图标也没有下拉菜单
为什么我的下拉菜单点击之后出不来，浏览器窗口缩小之后点击右侧的图标也没有下拉菜单
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>现代浏览器博物馆</title>
<link href="css/bootstrap.min.css" rel="stylesheet">
<!--[if lt IE 9]>
<script src="https://oss.maxcdn.com/html5shiv/3.7.2/html5shiv.min.js"></script>
<script src="https://oss.maxcdn.com/respond/1.4.2/respond.min.js"></script>
<![endif]-->
<style type="text/css">
body{padding-top: 70px;}
</style>
</head>
<body>
<nav class="navbar navbar-default">
<div>
<!-- Brand and toggle get grouped for better mobile display -->
<div>
<button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#bs-example-navbar-collapse-1" aria-expanded="false">
<span>Toggle navigation</span>
<span></span>
<span></span>
<span></span>
</button>
<a 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><a href="#">Link <span>(current)</span></a></li>
<li><a href="#">Link</a></li>
<li>
<a href="#" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">Dropdown <span></span></a>
<ul>
<li><a href="#">Action</a></li>
<li><a href="#">Another action</a></li>
<li><a href="#">Something else here</a></li>
<li role="separator"></li>
<li><a href="#">Separated link</a></li>
<li role="separator"></li>
<li><a href="#">One more separated link</a></li>
</ul>
</li>
</ul>
<form class="navbar-form navbar-left" role="search">
<div>
<input type="text" 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>
<a href="#" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">Dropdown <span></span></a>
<ul>
<li><a href="#">Action</a></li>
<li><a href="#">Another action</a></li>
<li><a href="#">Something else here</a></li>
<li role="separator"></li>
<li><a href="#">Separated link</a></li>
</ul>
</li>
</ul>
</div><!-- /.navbar-collapse -->
</div><!-- /.container-fluid -->
</nav>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.3/jquery.min.js"></script>
<script src="js/bootstrap.min.js"></script>
</body>
</html>
是晴是雨天浏览 3121回答 2
2回答
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沐幕苜
39 和 61 行 ul 加一个class=“dropdown-menu”.<ul class="dropdown-menu"> <li><a href="#">Action</a></li> <li><a href="#">Another action</a></li> <li><a href="#">Something else here</a></li> <li role="separator"></li> <li><a href="#">Separated link</a></li> <li role="separator"></li> <li><a href="#">One more separated link</a></li> </ul>
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