使用Bootstrap中的.dropdown-menu类为下拉菜单容器添加默认样式
<!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>Mobile Phones</h2> <p>The following are the mobile phone brands available in India:</p> <div class = "dropdown"> <button class = "btn btn-primary dropdown-toggle" type = "button" data-toggle = "dropdown">Companies <span class = "caret"></span></button> <ul class="dropdown-menu"> <li><a href = "#">Apple</a></li> <li><a href = "#">Samsung</a></li> <li><a href = "#">Oppo</a></li> <li><a href = "#">Nokia</a></li> </ul> </div> </div> </body> </html>