使用Bootstrap的拆分按钮下拉菜单
“拆分”按钮下拉菜单使用与下拉按钮相同的常规样式，但在下拉菜单中添加了主要操作。拆分按钮的左侧为主要操作，右侧为显示下拉菜单的切换开关。
示例
您可以尝试运行以下代码来拆分按钮下拉列表-
<!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">Admissions</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 = "#">Masters</a></li>
<li><a href = "#">Bachelors</a></li>
</ul>
</div>
<div class = "btn-group">
<button type = "button" class = "btn btn-primary">Faculty</button>
<button type = "button" class = "btn btn-primary 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 = "#">Management</a></li>
<li><a href = "#">Technical</a></li>
<li><a href = "#">Staff</a></li>
</ul>
</div>
</body>
</html>
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