要在Bootstrap中禁用下拉菜单项，请将.disabled类与.dropdown-menu类一起使用。
您可以尝试运行以下代码以禁用下拉项-
<!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><a href = "#">Gatorade</a></li> <li class = "disabled"><a href = "#">Sting</a></li> <li><a href = "#">Red Bull</a></li> <li><a href = "#">Pepsi</a></li> <li><a href = "#">Coca Cola</a></li> </ul> </div> </div> </body> </html>