bootstrap 多级联动下拉框
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<!DOCTYPE html> <html lang="zh-CN"> <head> <meta charset="UTF-8"> <title>Bootstrap 3 的多级下拉菜单示例</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" rel="external nofollow" /> <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"> <div class="form-group"> <input type="hidden" name="category_id" id="category_id" value="" /> <div class="dropdown"> <a id="dLabel" role="button" data-toggle="dropdown" class="btn btn-white" data-target="#" href="javascript:;" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" ><span id="select-title">选择分类</span> <span class="caret"></span></a> <ul class="dropdown-menu multi-level" role="menu" aria-labelledby="dropdownMenu"> <li><a href="javascript:;" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" data-index="1" data-title="一级菜单">一级菜单</a></li> <li class="dropdown-submenu"> <a href="javascript:;" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" data-index="2" data-title="一级菜单">一级菜单</a> <ul class="dropdown-menu"> <li><a data-index="2-1" href="javascript:;" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" data-title="二级菜单">二级菜单</a></li> </ul> </li> <li class="dropdown-submenu"> <a tabindex="3" href="javascript:;" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" data-title="一级菜单">一级菜单</a> <ul class="dropdown-menu"> <li><a tabindex="3-1" href="javascript:;" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" data-title="二级菜单">二级菜单</a></li> <li class="divider"></li> <li class="dropdown-submenu"> <a href="javascript:;" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" data-index="3-2" data-title="二级菜单">二级菜单</a> <ul class="dropdown-menu"> <li><a href="javascript:;" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" data-index="3-2-1" data-title="三级菜单">三级菜单</a></li> </ul> </li> </ul> </li> </ul> </div> </div> </div> </div> <script type="text/javascript"> $(‘.dropdown li a‘).click(function() console.log(this); title = $(this).attr("data-title"); id = $(this).attr("data-index"); $("#select-title").text(title); $("#category_id").val(id); ) </script> </body> </html>
参考：
https://www.jb51.net/article/128874.htm
https://www.cnblogs.com/stubborn-donkey/p/7248618.html
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