Bootstrap组合上、下拉框简单实现代码

本文实例为大家分享了Bootstrap组合上下拉框的具体代码，供大家参考，具体内容如下

<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>Bootstrap 101 Template</title>
<link href="http://cdn.bootcss.com/bootstrap/3.3.1/css/bootstrap-theme.min.css" rel="external nofollow" rel="stylesheet">
<link href="http://cdn.bootcss.com/bootstrap/3.3.1/css/bootstrap.min.css" rel="external nofollow" rel="stylesheet">
</head>
<body>

<!-- 下拉式 -->
<div class="btn-group">
<!-- 用于显示文字 -->
<button type="button" class="btn btn-default">select</button>
<button type="button" class="btn btn-default dropdown-toggle" data-toggle="dropdown">
<span class="caret"></span>
<span class="sr-only">Toggle Dropdown</span>
 </button>
<ul class="dropdown-menu" role="menu">
<li><a href="#" rel="external nofollow" rel="external nofollow" >Action</a></li>
</div>
<br/>
<br/>
<br/>
<br/>
<!-- 上拉式 -->
<div class="btn-group dropup">
<button type="button" class="btn btn-default">select</button>
<button type="button" class="btn btn-default dropdown-toggle" data-toggle="dropdown">
<span class="caret"></span>
<span class="sr-only">Toggle Dropdown</span>
 </button>
<ul class="dropdown-menu" role="menu">
<li><a href="#" rel="external nofollow" rel="external nofollow" >Action</a></li>
</div>

<script src="http://cdn.bootcss.com/jquery/2.1.1/jquery.min.js"></script>
<script src="http://cdn.bootcss.com/bootstrap/3.3.1/js/bootstrap.min.js"></script>
<script src="http://cdn.bootcss.com/bootstrap/3.3.1/js/npm.js"></script>
</body>
</html>

<!--

-->

结果：

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持我们。