在Bootstrap的下拉菜单中添加标题
要在下拉菜单中添加标题，请使用Boostrap中的.dropdown-header类。.dropdown-menu类用于添加下拉菜单。
您可以尝试运行以下代码以在Bootstrap中实现dropdown-header类-
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 = "container">
<h2>Beverages</h2>
<p>The following are the beverages available in India:</p>
<div class = "dropdown">
<button class = "btn btn-primary dropdown-toggle" type = "button" data-toggle="dropdown">Beverages
<span class = "caret"></span></button>
<ul class = "dropdown-menu">
<li class = "dropdown-header">Energy Drinks</li>
<li><a href = "#">Gatorade</a></li>
<li><a href = "#">Sting</a></li>
<li><a href = "#">Red Bull</a></li>
<li class = "dropdown-header">Sof Drinks</li>
<li><a href = "#">Pepsi</a></li>
<li><a href = "#">Coca Cola</a></li>
</ul>
</div>
</div>
</body>
</html>