使用Bootstrap将下拉菜单与任何按钮大小一起使用
使用btn-large，.btn-sm或.btn-xs类可使用具有任何按钮大小的下拉菜单。
让我们看一个btn-large的例子
示例
<!DOCTYPE html>
<html>
<head>
<title>Bootstrap Example</title>
<link href = "/bootstrap/css/bootstrap.min.css" rel = "stylesheet">
<script src = "/scripts/jquery.min.js"></script>
<script src = "/bootstrap/js/bootstrap.min.js"></script>
</head>
<body>
<div class = "btn-group">
<button type = "button" class = "btn btn-default dropdown-toggle btn-lg" data-toggle = "dropdown">
Default
<span class = "caret"></span>
</button>
<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>
</div>
</body>
</html>