这篇文章主要介绍layui导航栏不展示下拉列表怎么办，文中介绍的非常详细，具有一定的参考价值，感兴趣的小伙伴们一定要看完！
在使用导航栏时下拉列表不展示
没有下拉效果是这样的
经过修改后就解决了:
具体原因是没有导入:layui/layui.js
我的jsp代码是这样的：
<html>
<meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1">
<meta name="renderer" content="webkit|ie-comp|ie-stand">
<meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
<meta http-equiv="Cache-Control" content="no-siteapp" />
<link rel="shortcut icon" href="/favicon.ico" rel="external nofollow" type="image/x-icon" />
<link rel="stylesheet" href="/ssm/static/css/font.css" rel="external nofollow" >
<link rel="stylesheet" href="/ssm/static/css/xadmin.css" rel="external nofollow" >
<link rel="stylesheet" href="/ssm/static/lib/layui/css/layui.css" rel="external nofollow" />
<script type="text/javascript" src="/ssm/jquery/jquery-1.4.4.min.js"></script>
<script src="/ssm/static/lib/layui/layui.all.js" charset="utf-8"></script>
<script src="/ssm/static/lib/layui/layui.js" charset="utf-8"></script>
<script type="text/javascript" src="/ssm/static/js/xadmin.js"></script>
<head>
<title>Title</title>
</head>
<script>
//注意：导航 依赖 element 模块，否则无法进行功能性操作
layui.use('element', function(){
var element = layui.element;
});
</script>
<body>
<ul class="layui-nav">
<li class="layui-nav-item">
<a href="">控制台<span class=" rel="external nofollow" layui-badge">9</span></a>
</li>
<li class="layui-nav-item">
<a href="">个人中心<span class=" rel="external nofollow" layui-badge-dot"></span></a>
</li>
<li class="layui-nav-item">
<a href=""><img src=" rel="external nofollow" //t.cn/RCzsdCq" class="layui-nav-img">我</a>
<dl class="layui-nav-child">
<dd><a href="javascript:;" rel="external nofollow" rel="external nofollow" rel="external nofollow" >修改信息</a></dd>
<dd><a href="javascript:;" rel="external nofollow" rel="external nofollow" rel="external nofollow" >安全管理</a></dd>
<dd><a href="javascript:;" rel="external nofollow" rel="external nofollow" rel="external nofollow" >退了</a></dd>
</dl>
</li>
</ul>
</body>
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