bootstrap 导航栏
<!DOCTYPE html>
<html >
<style type="text/css">
.navbar-nav .dropdown-menu-width{
min-width: 100px;
background-color: black;
color: white;
}
.navbar-nav .dropdown-menu-width>li>a{
color: white;
}
.navbar-nav .dropdown-menu-width>li>a:hover{
color: red;
}
/*.nav > li:hover .dropdown-menu {display: block;}*/
.navbar-nav .dropdown-menu-width:after {
position: absolute;
width: 0;
height: 0;
top: -16px;
left: 45%;
border: 6px rgba(0, 0, 0, 0) solid;
content: " ";
z-index: 1;
border-bottom-color: black;
}
</style>
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1">
<!-- 上述3个meta标签*必须*放在最前面，任何其他内容都*必须*跟随其后！ -->
<title>导航菜单</title>
<link href="css/bootstrap.min.css" rel="stylesheet" />
</head>
<body>
<div class="navbar navbar-fixed-top navbar-default" >
<div class="container-fluid">
<div class="navbar-header">
<a class="navbar-brand" href="#"> <img src="img/logo.png" class="img-responsive" ></a>
<a class="navbar-toggle" data-toggle="collapse" href="#collapse2">
<span class="icon-bar"></span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
</a>
</div>
<div class="navbar-collapse collapse hidden-xs" >
<ul class="nav navbar-nav">
<li><a href="#" data-toggle="tab">首页</a></li>
<li class="active"><a href="#" data-toggle="tab">新闻</a></li>
<li class="dropdown">
<a href="#" class="dropdown-toggle" data-toggle="dropdown">产品大全
<span class="caret"></span>
</a>
<ul class="dropdown-menu-width dropdown-menu ">
<li><a href="#" data-toggle="tab">产品1</a></li>
<li><a href="#" data-toggle="tab">产品2</a></li>
<li class="divider"></li>
<li><a href="#" data-toggle="tab">产品3</a></li>
</ul>
</li>
</ul>
<a href="#" class="navbar-link navbar-text navbar-right">右侧文字内容</a>
</div>
<div class="navbar-collapse collapse" >
<ul class="nav navbar-nav hidden-lg">
<li><a href="#" data-toggle="tab">首页</a></li>
<li class="active"><a href="#" data-toggle="tab">新闻</a></li>
<li class="dropdown">
<a href="#" class="dropdown-toggle" data-toggle="dropdown">产品大全22
<span class="caret"></span>
</a>
<ul class="dropdown-menu">
<li><a href="#" data-toggle="tab">产品1</a></li>
<li><a href="#" data-toggle="tab">产品2</a></li>
<li class="divider"></li>
<li><a href="#" data-toggle="tab">产品3</a></li>
</ul>
</li>
</ul>
</div>
</div>
</div>
<!-- jQuery (necessary for Bootstrap\'s JavaScript plugins) -->
<script src="js/jquery.min.js"></script>
<!-- Include all compiled plugins (below), or include individual files as needed -->
<script src="js/bootstrap.min.js"></script>
</body>
</html>
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