“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。
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>