具体代码如下所示：
<el-menu :default-active=‘$route.path‘ :router=‘true‘ :unique-opened=‘true‘ :default-openeds="defaultOpeneds" background-color="#bd1e22" text-color="#fff" active-text-color="#ffd04b"> //router当导航激活时允许以index作为路由进行页面的跳转,$route.path当前路由对象的路径，字符串，绝对路径 //unique-opened只允许有一个下拉菜单处于打开的状态 //使用default-active来实现当前菜单激活的选项 //default-openeds当前打开的 sub-menu 的 index 的数组 <el-menu-item index=‘/home‘>首页</el-menu-item> <el-submenu> <template slot="title"> <i class=‘‘></i><span>导航一</span> </template> <el-menu-item index=‘/first/page1‘> <template slot="title"> <i class=‘‘></i><span>选项一</span> </template> </el-menu-item> <el-menu-item index=‘/first/page2‘> <template slot="title"> <i class=‘‘></i><span>选项二</span> </template> </el-menu-item> </el-submenu> </el-menu >
mounted(){ let path = this.$route.path; this.navConfig = [ {index:'1',path:['/system/aa','/system/bb','/system/cc']}, ]; let thisNav = this.navConfig.find(item =>{ return item.path.includes(path); }); this.defaultOpeneds = [thisNav.index]; }
ps：下面看下vue Element-ui el-menu 左侧导航条
<template> <!--实现左侧导航条动态渲染(三级)--> <el-menu @open="handleOpen" @close="handleClose" :collapse="isCollapse" router unique-opened background-color="#545c64" text-color="#fff" active-text-color="#ffd04b"> <el-menu-item index="/home/main"> <i></i> <span slot="title">首页</span> </el-menu-item> <el-submenu v-for="(item,index) in content" :key="item.id" :data="item" v-if="item.children.length>0&&item.level==1" :index="item.linkname"> <template slot="title"> <i></i> <span slot="title">{{item.linkname}}</span> </template> <el-submenu v-for="(child,seq) in item.children" :data="child" v-if="item.id==child.parentid&&child.children.length>0&&child.level==2" :key="child.id" :index="child.linkname"> <span slot="title">{{child.linkname}}</span> <el-menu-item v-for="three in child.children" :data="three" v-if="child.id==three.parentid&&child.children.length!=0&&three.level==3" :key="three.id" :index="three.link"> <span slot="title">{{three.linkname}}</span> </el-menu-item> </el-submenu> <!--2无子级显示--> <el-menu-item v-for="(child,seq) in item.children" :data="child" v-if="item.id==child.parentid&&child.children.length==0&&child.level==2" :key="child.id" :index="child.link"> <span slot="title">{{child.linkname}}</span> </el-menu-item> </el-submenu> <!--1无子级显示且不支持点击事件--> <el-menu-item v-for="(item,index) in content" :key="item.id" :data="item" v-if="item.children.length==0&&item.level==1" :index="item.linkname" :disabled="item.children.length==0 ? true : false "> <i></i> <span slot="title">{{item.linkname}}</span> </el-menu-item> </el-menu> </div> </template> <script> import axios from "axios"; import $ from 'jquery'; export default { data() { return { content: [], isCollapse: false, defaultProps: { children: 'children', label: 'linkname' } }; }, mounted(){ var _self = this; axios.get('https://5b90a18b3ef10a001445d08e.mockapi.io/api/v1/resources') .then(function (response) { _self.content = returnZhData(response.data); }) .catch(function (error) { console.log(error); }); }, methods: { handleOpen(key, keyPath) { console.log(key, keyPath); }, handleClose(key, keyPath) { console.log(key, keyPath); }, handleNodeClick(content) { console.log(content); } } } function returnZhData(data){ var arrone=[]; $.each(data, function(index,one) { if(one['level'] == 1){ arrone.push(one); var arrtwo=[]; $.each(data, function(index,two) { if(two['level'] == 2 && two['parentid']==one['id']){ arrtwo.push(two); var arrthree=[]; $.each(data, function(index,three) { if(three['level'] == 3 && three['parentid']==two['id']){ arrthree.push(three); } }); two.children=arrthree; } }); one.children = arrtwo; } }); return arrone; } </script> <style> .el-menu-vertical-demo:not(.el-menu--collapse) { width: auto; min-height: 400px; } </style>
总结