Bootstrap Button dropdown menus
Pop down menus
Use any button to trigger a dropdown menu by placing it within a .btn-group and providing the proper menu markup.
The following code turns a button into a dropdown toggle with some basic markup changes.
<!DOCTYPE HTML>
<html>
<head>
<link href="http://java2s.com/style/bootstrap.min.css" rel="stylesheet">
<!--from w w w.ja v a2s .c o m-->
<script src="http://java2s.com/style/jquery-1.8.0.min.js"></script>
<script src="http://java2s.com/style/bootstrap.min.js"></script>
</head>
<body style='margin:20px;'>
<!-- Single button -->
<div class="btn-group">
<button type="button" class="btn btn-default dropdown-toggle" data-toggle="dropdown">
Action <span class="caret"></span>
</button>
<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 class="divider"></li>
<li><a href="#">Separated link</a></li>
</ul>
</div>
</body>
</html>
Change the button style to primary.
<!DOCTYPE HTML>
<html>
<head>
<link href="http://java2s.com/style/bootstrap.min.css" rel="stylesheet">
<!--from ww w. jav a 2 s. co m-->
<script src="http://java2s.com/style/jquery-1.8.0.min.js"></script>
<script src="http://java2s.com/style/bootstrap.min.js"></script>
</head>
<body style='margin: 20px;'>
<div class="btn-group">
<button type="button" class="btn btn-primary dropdown-toggle"
data-toggle="dropdown">
Action <span class="caret"></span>
</button>
<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 class="divider"></li>
<li><a href="#">Separated link</a></li>
</ul>
</div>
</body>
</html>
Mark the button as danger.
<!DOCTYPE HTML>
<html>
<head>
<link href="http://java2s.com/style/bootstrap.min.css" rel="stylesheet">
<!-- w ww . j ava2 s . com-->
<script src="http://java2s.com/style/jquery-1.8.0.min.js"></script>
<script src="http://java2s.com/style/bootstrap.min.js"></script>
</head>
<body style='margin: 20px;'>
<button type="button" class="btn btn-danger dropdown-toggle"
data-toggle="dropdown">
Danger <span class="caret"></span>
</button>
</body>
</html>
Warning button dropdown
<!DOCTYPE HTML>
<html>
<head>
<link href="http://java2s.com/style/bootstrap.min.css" rel="stylesheet">
<!--from w w w. j a v a2 s . c o m-->
<script src="http://java2s.com/style/jquery-1.8.0.min.js"></script>
<script src="http://java2s.com/style/bootstrap.min.js"></script>
</head>
<body style='margin: 20px;'>
<button type="button" class="btn btn-warning dropdown-toggle"
data-toggle="dropdown">
Danger <span class="caret"></span>
</button>
</body>
</html>
Success button.
<!DOCTYPE HTML>
<html>
<head>
<link href="http://java2s.com/style/bootstrap.min.css" rel="stylesheet">
<script src="http://java2s.com/style/jquery-1.8.0.min.js"></script>
<script src="http://java2s.com/style/bootstrap.min.js"></script>
</head><!--from w w w . j a v a 2s . com-->
<body style='margin: 20px;'>
<button type="button" class="btn btn-success dropdown-toggle"
data-toggle="dropdown">
Danger <span class="caret"></span>
</button>
</body>
</html>