免费资源部落

今天小编给大家分享一下怎么使用el-menu递归实现多级菜单组件的相关知识点，内容详细，逻辑清晰，相信大部分人都还太了解这方面的知识，所以分享这篇文章给大家参考一下，希望大家阅读完这篇文章后有所收获，下面我们一起来了解一下吧。

1. 效果：2. 实现：

创建外层菜单AsideMenu.vue组件和子菜单项AsideSubMenu.vue组件，在AsideSubMenu中进行递归操作。

AsideMenu.vue文件内容如下：

<template><asideclass="wrap"><el-menu:default-active="activeMenu"router:class="'menu-left'":default-openeds="openedsArr"text-color="#fff"><AsideSubMenu:menuData="menuData"></AsideSubMenu></el-menu></aside></template><script>importAsideSubMenufrom"./AsideSubMenu.vue";exportdefault{name:"AsideMenu",components:{AsideSubMenu,},props:{menuData:{type:Array,},},computed:{activeMenu(){constroute=this.$route;const{meta,path}=route;//此处添加判断的原因见说明if(meta.matchPath){returnmeta.matchPath;}else{returnpath;}},//设置默认展开菜单项openedsArr(){//constarr=this.menuData.map((item)=>{//returnitem.title;//});//returnarr;return[];},},};</script>

判断高亮状态的activeMenu方法中的判断matchPath属性可以让多个路由不同的页面匹配同一个菜单高亮状态，因为菜单高亮状态是根据路由地址匹配的。如果两个不同的路由页面想公用同一个菜单高亮状态（如详情页面和列表页）就可以使用该方法实现。在router文件里设置meta对象，添加matchPath属性设置为想要共用的高亮状态的页面的路由地址。（有点绕????）

样式根据需求修改，示例中的样式如下（此处包含深浅两种主题的菜单样式）：

<stylescoped>aside{height:100%;text-align:center;}.el-menu{padding:16px;box-sizing:border-box;}/*----------深色----------*/.menu-left,.menu-left/deep/.el-menu{min-height:100%;background-color:#222653;}.menu-left.icon{width:20px;margin-right:9px;}.menu-left/deep/.el-submenu__title,.menu-left/deep/.el-menu-item{box-sizing:border-box;font-size:14px;font-family:PingFangSC-Regular,PingFangSC;text-align:left;color:#b3c0e7!important;background-color:#222653!important;}.menu-left/deep/.el-submenu__titlei{color:#b3c0e7!important;}.menu-left/deep/.el-submenu__title{height:54px;line-height:54px;/*padding-left:36px!important;*/}.menu-left/deep/.el-menu-item{height:52px;line-height:52px;}.menu-left/deep/.el-submenu.el-menu-item{padding-left:45px!important;}/*外层高亮*/.menu-left/deep/.el-submenu.is-active,.menu-left/deep/.el-submenu.is-active.el-menu-item,.menu-left/deep/.el-submenu.is-active.el-submenu__title,.menu-left/deep/.el-menu-item.is-active{background-color:#4880ff!important;}.menu-left/deep/.el-submenu.is-active{border-radius:10px;overflow:hidden;}.menu-left/deep/.el-menu-item.is-active{border-radius:10px;}.menu-left/deep/.el-menu--inline.el-menu-item.is-active,.menu-left/deep/.el-submenu.noIcon{border-radius:0;}.menu-left/deep/.el-submenu.noIcon.el-submenu__title{padding-left:45px!important;}.menu-left/deep/.el-submenu.noIcon.el-menu-item{padding-left:58px!important;}.menu-left/deep/.el-submenu.is-active>.el-submenu__title,.menu-left/deep/.el-submenu.is-active>.el-submenu__titlei{color:#ffffff!important;}/*内层高亮*/.menu-left/deep/.el-menu-item:focus,.menu-left/deep/.el-menu-item:hover,.menu-left/deep/.el-menu-item.is-active{color:#ffffff!important;font-weight:500;}.menu-left/deep/.el-menu-item.is-disabled{padding-left:45px!important;color:#ffffff!important;}/*----------浅色----------*/.menu-left-light{height:100%;background-color:#f8f8f8;}.menu-left-light.icon{width:20px;margin-right:9px;}.menu-left-light/deep/.el-submenu__title,.menu-left-light/deep/.el-menu-item{box-sizing:border-box;font-size:16px;font-family:PingFangSC-Regular,PingFangSC;text-align:left;color:#333333;}.menu-left-light/deep/.el-submenu__title{height:52px;line-height:52px;padding-left:56px!important;}.menu-left-light/deep/.el-submenu__title:hover{background-color:#ffffff!important;}.menu-left-light/deep/.el-submenu__icon-arrow{right:85px;}.menu-left-light/deep/.el-submenu__titlei{color:#333333;}.menu-left-light/deep/.el-menu-item{height:40px;line-height:40px;padding-left:82px!important;border-left:4pxsolid#ffffff;}.menu-left-light/deep/.el-menu-item:focus,.menu-left-light/deep/.el-menu-item:hover,.menu-left-light/deep/.el-menu-item.is-active{background:rgba(31,65,219,0.1)!important;color:#1f41db!important;border-color:#1f41db;}.menu-left-light/deep/.el-menu-item.is-disabled{background:#ffffff!important;color:#333333!important;}</style>

AsideMenu.vue文件内容如下：

<template><div><templatev-for="iteminmenuData"><el-submenu:key="item.path"v-if="item.children&&item.children.length>0":index="item.path":class="item.icon?'':'noIcon'"><templateslot="title"><imgclass="iconmr-r-10":src="curRoute.indexOf(item.path)!=-1?item.iconActive:item.icon"/><span>{{item.title}}</span></template><AsideSubMenu:menuData="item.children"></AsideSubMenu></el-submenu><el-menu-item:key="item.id"v-else:index="item.path":disabled="item.disabled"><templateslot="title"><imgclass="iconmr-r-10":src="curRoute.indexOf(item.path)!=-1?item.iconActive:item.icon"/><span>{{item.title}}</span></template></el-menu-item></template></div></template>

判断如果有子菜单则进行遍历操作。同时此处根据是否有icon给el-submenu动态添加了一个类名:class="item.icon ? '' : 'noIcon'"，这么做是由于高亮状态下的.el-submenu添加了圆角效果，在存在多层子菜单嵌套的情况下如果不清除圆角效果则会出现问题（见下图）。这个状态下不好用选择器选中需要操作的元素，因此根据是否有icon这个区别进行了区分。如果是整个菜单都没有icon的情况的话，那暂时还没想好应对策略。????

<script>importAsideSubMenufrom"./AsideSubMenu.vue";exportdefault{name:"AsideSubMenu",components:{AsideSubMenu,},props:{menuData:{type:Array,default:()=>{return[];},},},computed:{curRoute(){returnthis.$route.path;},},};</script>3. 使用组件：

添加路由配置；

引入并挂载组件；

传入菜单数据；

代码如下：

<template><el-containerclass="container"><el-asidewidth="320px"><AsideMenu:menuData="menuData"></AsideMenu></el-aside><el-main><keep-alive:exclude="[]"><router-view></router-view></keep-alive></el-main></el-container></template><script>importAsideMenufrom'@/components/AsideMenu.vue';exportdefault{name:'MenuTest',components:{AsideMenu},data(){return{menuData:[{title:'菜单一',path:'/menutest/menu1',icon:require('@/assets/icons/apply.svg'),iconActive:require('@/assets/icons/apply_active.svg'),children:[{title:'子菜单一',path:'/menutest/menu1/menu1-1',//disabled:true,},{title:'子菜单二',path:'/menutest/menu1/menu1-2'}]},{title:'菜单二',path:'/menutest/menu2',icon:require('@/assets/icons/apply.svg'),iconActive:require('@/assets/icons/apply_active.svg'),children:[{title:'子菜单一',path:'/menutest/menu2/menu2-1'},{title:'子菜单二',path:'/menutest/menu2/menu2-2',children:[{title:'孙子菜单一',path:'/menutest/menu2/menu2-2/menu2-1-1'},{title:'孙子菜单二',path:'/menutest/menu2/menu2-2/menu2-2-2'}]},{title:'子菜单三',path:'/menutest/menu2/menu2-3'}]},{title:'菜单三',path:'/menutest/menu3',icon:require('@/assets/icons/apply.svg'),iconActive:require('@/assets/icons/apply_active.svg'),}]};}};</script><stylescoped>.container{min-height:800px;}.el-main{padding:32px40px;box-sizing:border-box;background:#f5f5fa;overflow-y:auto;}</style>

示例中的路由配置如下：

{path:"/menutest",name:"Menu",component:()=>import("../views/MenuTest.vue"),redirect:"/menutest/menu1",children:[{path:'/menutest/menu1',component:()=>import("../views/menuPages/menu1.vue"),children:[{path:'/menutest/menu1/menu1-1',component:()=>import("../views/menuPages/menu1-1.vue"),},{path:'/menutest/menu1/menu1-2',component:()=>import("../views/menuPages/menu1-2.vue"),}]},{path:'/menutest/menu2',component:()=>import("../views/menuPages/menu2.vue"),children:[{path:'/menutest/menu2/menu2-1',component:()=>import("../views/menuPages/menu2-1.vue"),},{path:'/menutest/menu2/menu2-2',component:()=>import("../views/menuPages/menu2-2.vue"),children:[{path:'/menutest/menu2/menu2-2/menu2-1-1',component:()=>import("../views/menuPages/menu2-1-1.vue"),},{path:'/menutest/menu2/menu2-2/menu2-2-2',component:()=>import("../views/menuPages/menu2-1-2.vue"),}]},{path:'/menutest/menu2/menu2-3',component:()=>import("../views/menuPages/menu2-3.vue"),}]},{path:'/menutest/menu3',component:()=>import("../views/menuPages/menu3.vue"),}]}

以上就是“怎么使用el-menu递归实现多级菜单组件”这篇文章的所有内容，感谢各位的阅读！相信大家阅读完这篇文章都有很大的收获，小编每天都会为大家更新不同的知识，如果还想学习更多的知识，请关注行业资讯频道。