Bootstrap 雖好，但對于復雜的界面，還是有N多組件需要自己擴展，并且要往簡潔、大氣的Bootstrap界面上靠，著實要費一些功夫。下面分享一個Bootstrap 3的多級下拉菜單，無需第三方Js腳本，復制后直接可用。
<!DOCTYPE HTML> <html lang="zh-CN"> <head> <meta charset="UTF-8"> <title>Bootstrap 3 的多級下拉菜單示例</title> <script type="text/javascript" src="http://libs.baidu.com/jquery/1.9.0/jquery.js"></script> <link rel="stylesheet" href="http://libs.baidu.com/bootstrap/3.0.3/css/bootstrap.min.css"/> <script type="text/javascript" src="http://libs.baidu.com/bootstrap/3.0.3/js/bootstrap.min.js"></script> <style type="text/css"> .dropdown-submenu { position: relative; } .dropdown-submenu > .dropdown-menu { top: 0; left: 100%; margin-top: -6px; margin-left: -1px; -webkit-border-radius: 0 6px 6px 6px; -moz-border-radius: 0 6px 6px; border-radius: 0 6px 6px 6px; } .dropdown-submenu:hover > .dropdown-menu { display: block; } .dropdown-submenu > a:after { display: block; content: " "; float: right; width: 0; height: 0; border-color: transparent; border-style: solid; border-width: 5px 0 5px 5px; border-left-color: #ccc; margin-top: 5px; margin-right: -10px; } .dropdown-submenu:hover > a:after { border-left-color: #fff; } .dropdown-submenu.pull-left { float: none; } .dropdown-submenu.pull-left > .dropdown-menu { left: -100%; margin-left: 10px; -webkit-border-radius: 6px 0 6px 6px; -moz-border-radius: 6px 0 6px 6px; border-radius: 6px 0 6px 6px; } </style> </head> <body> <div class="container"> <div class="row"> <h2>Bootstrap 3多級下拉菜單</h2> <hr> <div class="dropdown"> <a id="dLabel" role="button" data-toggle="dropdown" class="btn btn-primary" data-target="#" href="javascript:;"> 下拉多級菜單 <span class="caret"></span> </a> <ul class="dropdown-menu multi-level" role="menu" aria-labelledby="dropdownMenu"> <li><a href="javascript:;">一級菜單</a></li> <li><a href="javascript:;">一級菜單</a></li> <li class="divider"></li> <li class="dropdown-submenu"> <a tabindex="-1" href="javascript:;">一級菜單</a> <ul class="dropdown-menu"> <li><a tabindex="-1" href="javascript:;">二級菜單</a></li> <li class="divider"></li> <li class="dropdown-submenu"> <a href="javascript:;">二級菜單</a> <ul class="dropdown-menu"> <li><a href="javascript:;">三級菜單</a></li> </ul> </li> </ul> </li> </ul> </div> </div> </div> </body> </html> 以上就是本文的全部內容，希望對大家的學習有所幫助，也希望大家多多支持VeVb武林網。
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