导航栏：
1.layui-this：指向当前页面分类
2.layui-nav、layui-nav-tree、layui-nav-side：水平、垂直、侧边展示
3.layui-nav-item、layui-nav-itemed、layui-nav-child：节点、节点是否展开、子节点
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>开始使用Layui</title>
<meta name="renderer" content="webkit">
<meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
<meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1">
<link rel="stylesheet" href="/layui/css/layui.css">
</head>
<body>
<!-- 导航 -->
<ul class="layui-nav" lay-filter="">
<li class="layui-nav-item"><a href="">最新活动</a></li>
<li class="layui-nav-item layui-this"><a href="">产品</a></li>
<li class="layui-nav-item"><a href="">大数据</a></li>
<li class="layui-nav-item"><a href="javascript:;">解决方案</a>
<dl class="layui-nav-child">
<!-- 二级菜单 -->
<dd>
<a href="">移动模块</a>
</dd>
<dd>
<a href="">后台模版</a>
</dd>
<dd>
<a href="">电商平台</a>
</dd>
</dl></li>
<li class="layui-nav-item"><a href="">社区</a></li>
</ul>
<ul class="layui-nav layui-nav-tree" lay-filter="test">
<!-- 侧边导航: <ul class="layui-nav layui-nav-tree layui-nav-side"> -->
<li class="layui-nav-item layui-nav-itemed"><a
href="javascript:;">默认展开</a>
<dl class="layui-nav-child">
<dd>
<a href="javascript:;">选项1</a>
</dd>
<dd>
<a href="javascript:;">选项2</a>
</dd>
<dd>
<a href="">跳转</a>
</dd>
</dl></li>
<li class="layui-nav-item"><a href="javascript:;">解决方案</a>
<dl class="layui-nav-child">
<dd>
<a href="">移动模块</a>
</dd>
<dd>
<a href="">后台模版</a>
</dd>
<dd>
<a href="">电商平台</a>
</dd>
</dl></li>
<li class="layui-nav-item"><a href="">产品</a></li>
<li class="layui-nav-item"><a href="">大数据</a></li>
</ul>
<!-- 面包屑 -->
<div class="layui-input-block">
<span class="layui-breadcrumb">
<a href="">首页</a>
<a href="">国际新闻</a>
<a href="">亚太地区</a>
<a><cite>正文</cite></a>
</span>
</div>
<div class="layui-input-block">
<span class="layui-breadcrumb" lay-separator="-"> <a href="">首页</a>
<a href="">国际新闻</a> <a href="">亚太地区</a> <a><cite>正文</cite></a>
</span>
</div>
<div class="layui-input-block">
<span class="layui-breadcrumb" lay-separator="|"> <a href="">娱乐</a>
<a href="">八卦</a> <a href="">体育</a> <a href="">搞笑</a> <a href="">视频</a>
<a href="">游戏</a> <a href="">综艺</a>
</span>
</div>
<script src="../../layui/layui.js"></script>
<script>
//一般直接写在一个js文件中
layui.use('element', function(){
var element = layui.element();
});
</script>
</body>