1 <!DOCTYPE html> 2 <html lang="en"> 3 <head> 4 <meta charset="UTF-8"> 5 <meta name="viewport" content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0"> 6 <title>Document</title> 7 <script type="text/javascript" src="../jquery-1.12.4.min.js"></script> 8 <script type="text/javascript" src="./js/bootstrap.min.js"></script> 9 <link rel="stylesheet" type="text/css" href="./css/bootstrap.min.css"> 10 </head> 11 <body> 12 <div class="container"> 13 <div class="row"> 14 <div class="dropdown"> 15 <div class="btn btn-primary dropdown-toggle" data-toggle="dropdown"> 16 下拉菜单 17 <span class="caret"></span> 18 </div> 19 <ul class="dropdown-menu"> 20 <li><a href="#">菜单一</a></li> 21 <li><a href="#">菜单二</a></li> 22 <li><a href="#">菜单三</a></li> 23 </ul> 24 </div> 25 </div> 26 </div> 27 </body> 28 </html>
原文：https://www.cnblogs.com/kogmaw/p/12506509.html