原文作者：我辈李想
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前言

el-menu 是element-ui的菜单组件，为网站提供导航功能的菜单。

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一、Vue路由

这里需要vue路由的相关知识，需要自行学习。

二、路由一级控制高亮（常用）

1.vue中路由文件

需要注意的是path参数中开头为/

export default {path: '/personalCenter',name: 'personalCenter',meta: { title: '订单中心', parent: 'layout' },redirect: '/shoppingCart',component: () => import('@/views/personalCenter'),children: [{path: '/shoppingCart',name: 'shoppingCart',meta: { title: '我的购物车', parent: 'personalCenter' },component: ()=> import('@/views/personalCenter/module/shoppingCart.vue')},{path: '/archiveOrder',name: 'archiveOrder',meta: { title: '我的存档订单', parent: 'personalCenter'},component: ()=> import('@/views/personalCenter/module/archiveOrder.vue')},{path: '/myProgrammingOrder',name: 'myProgrammingOrder',meta: { title: '我的编程订单', parent: 'personalCenter'},component: ()=> import('@/views/personalCenter/module/myProgrammingOrder.vue')},]
}

2.网址样式

3.Vue文件

需要注意的是el-menu的default-active参数和el-menu-item的index参数。el-menu是基于当default-active和index一致时保持高亮（active）。一般我们设置default-active为this.$route。

<template><div class="user"><div class="menu"><el-menu:default-active="$route.path"class="el-menu-vertical-demo"@select="handleSelect"><template v-for="(item, index) in routes"><el-menu-item:key="index":index="item.path"><span slot="title">{{ item.meta.title }}</span></el-menu-item></template></el-menu></div><router-view class="info" /></div>
</template>
<script>
import tree from '@/utils/tree';
export default {components: {},data() {return {routes: tree(this.$router.getRoutes())[0].children[6].children};},computed: {},watch: {},created() {},methods: {handleSelect(val) {console.log(this.$route);this.$router.push(val);},navbar() {this.$nextTick(() => {this.routes = tree(this.$router.getRoutes())[0].children[6].children;this.routes.map(item=>{item.meta.title = this.$t(`layout.${item.name}`);});});}}
};
</script>

4.$route的内容

三、路由二级控制高亮

1.vue中路由文件

需要注意的是path参数中开头无/。

export default {path: '/personalCenter',name: 'personalCenter',meta: {title: '订单中心',parent: 'layout',isShow: true},redirect: '/personalCenter/shoppingCart',component: () => import('@/views/personalCenter'),children: [{path: 'shoppingCart',name: 'shoppingCart',meta: {title: '我的购物车',parent: 'personalCenter',isShow: true},component: () => import('@/views/personalCenter/module/shoppingCart.vue')},{path: 'archiveOrder',name: 'archiveOrder',meta: {title: '我的存档',parent: 'personalCenter',isShow: true},component: () => import('@/views/personalCenter/module/archiveOrder.vue')},{path: 'myProgrammingOrder',name: 'myProgrammingOrder',meta: {title: '我的下单',parent: 'personalCenter',isShow: true},component: () =>import('@/views/personalCenter/module/myProgrammingOrder.vue')},]
}

2.浏览器网址样式

3.Vue代码

<template><div class="user"><div class="menu"><el-menu:default-active="$route.matched[2].path"class="el-menu-vertical-demo"@select="handleSelect"><template v-for="(item, index) in routes"><el-menu-item:key="index":index="item.path"><span slot="title">{{ item.meta.title }}</span></el-menu-item></template></el-menu></div><router-view class="info" /></div>
</template>
<script>
import tree from '@/utils/tree';
export default {components: {},data() {return {routes: tree(this.$router.getRoutes())[0].children[6].children};},computed: {},watch: {},created() {},methods: {handleSelect(val) {console.log(this.$route);this.$router.push(val);},navbar() {this.$nextTick(() => {this.routes = tree(this.$router.getRoutes())[0].children[6].children;this.routes.map(item=>{item.meta.title = this.$t(`layout.${item.name}`);});});}}
};

4.$route的内容

$route.matched[1]

$route.matched[2]

6.当路由超过三级时，二级路由依然生效

浏览器网址

$route的内容

四、可以衍生路由三级控制高亮

这里我就不做示例了，兄弟们自行尝试吧。