前提条件

package.json如下所示，这是一个Vite + Vue3 + TS的项目

{"name": "vue3-ts-vite-wen-zhang-ji-lu-xiang-mu","private": true,"version": "0.0.0","type": "module","scripts": {"dev": "vite","build": "vue-tsc && vite build","preview": "vite preview"},"dependencies": {"element-plus": "^2.4.2","vue": "^3.3.4"},"devDependencies": {"@vitejs/plugin-vue": "^4.2.3","sass": "^1.69.5","typescript": "^5.0.2","vite": "^4.4.5","vue-tsc": "^1.8.5"}
}

下面为了方便，直接在App.vue组件中，代码结构如下所示，就一纯净项目，然后直接在App.vue中写代码

假设菜单等级只有两个等级

如果菜单等级只有两个等级，那就没有必要使用到递归了，直接遍历，然后根据是否有children字段，判断是一级菜单还是二级菜单就可以了。具体代码如下所示：

<template><div style="width: 100%; height: 100%;"><div class="common-layout"><el-container><el-header>头部</el-header><el-container><!-- 侧边栏区域 --><el-aside width="200px"><el-menu default-active="2" class="el-menu-vertical-demo" @open="handleOpen" @close="handleClose"><template v-for="(item, index) in menuList" :key="index"><el-sub-menu :index="item.path" v-if="item.children && item.children.length"><template #title><el-icon><location /></el-icon><span>{{ item.name }}</span></template><el-menu-item v-for="child in item.children" :key="child.id" :index="child.path">{{ child.name }}</el-menu-item></el-sub-menu><el-menu-item v-else :index="item.path"><el-icon><setting /></el-icon><span>{{ item.name }}</span></el-menu-item></template></el-menu></el-aside><!-- 主题区域 --><el-main>这是主题区域</el-main></el-container></el-container></div></div>
</template><script setup lang="ts">javascript">
import { ref } from 'vue'
import { Location, Setting } from '@element-plus/icons-vue'interface MenuItem {id: number;name: string;path: string;icon?: string;component?: string;children?: MenuItem[];
}const menuList = ref<MenuItem[]>([{id: 1,name: '首页',path: '/',icon: 'location',component: 'home',children: []},{id: 2,name: '用户管理',path: '/user',icon: 'location',component: 'user',children: [{id: 3,name: '用户列表',path: 'list',icon: '',component: 'userList',children: []},{id: 5,name: '角色列表',path: 'roleList',icon: '',component: 'userList',children: []}]},{id: 6,name: '权限管理',path: '/permission',icon: 'setting',component: 'permission',children: [{id: 7,name: '权限列表',path: 'permissionList',icon: '',component: 'permissionList',}]}]
)const handleOpen = (key: string, keyPath: string[]) => {console.log(key, keyPath)
}
const handleClose = (key: string, keyPath: string[]) => {console.log(key, keyPath)
}</script><style scoped lang="scss">
.el-container {width: 100%;height: 100%;
}
</style>

结果如下所示

但是如果菜单等级超过两个等级或者多个等级的话

但是如果菜单等级超过两个等级或者多个等级的话，这时就可以使用到组件递归的方式进行了。目录结构如下所示：

App.vue

<template><div style="width: 100%; height: 100%;"><div class="common-layout"><el-container><el-header>头部</el-header><el-container><!-- 侧边栏区域 --><el-aside width="200px"><el-menu default-active="2" class="el-menu-vertical-demo" @open="handleOpen" @close="handleClose"><menu-items :items="menuList"></menu-items></el-menu></el-aside><!-- 主题区域 --><el-main>这是主题区域</el-main></el-container></el-container></div></div>
</template><script setup lang="ts">javascript">
import { ref } from 'vue'
import MenuItems from './components/MenuItems.vue'interface MenuItem {id: number;name: string;path: string;icon?: string;component?: string;children?: MenuItem[];
}const menuList = ref<MenuItem[]>([{id: 1,name: '首页',path: '/',icon: 'location',component: 'home',children: []},{id: 2,name: '用户管理',path: '/user',icon: 'location',component: 'user',children: [{id: 3,name: '用户列表',path: 'list',icon: '',component: 'userList',children: [{id: 4,name: '用户详情',path: 'userDetail',icon: '',component: 'userDetail',children: []}]},{id: 5,name: '角色列表',path: 'roleList',icon: '',component: 'userList',children: []}]},{id: 6,name: '权限管理',path: '/permission',icon: 'setting',component: 'permission',children: [{id: 7,name: '权限列表',path: 'permissionList',icon: '',component: 'permissionList',children: [{id: 8,name: '权限详情-1',path: 'permissionDetail',icon: '',component: 'permissionDetail',children: [{id: 9,name: '权限详情-2',path: 'permissionDetail2',icon: '',component: 'permissionDetail2',children: []}]}]}]}]
)const handleOpen = (key: string, keyPath: string[]) => {console.log(key, keyPath)
}
const handleClose = (key: string, keyPath: string[]) => {console.log(key, keyPath)
}</script><style scoped lang="scss">
.el-container {width: 100%;height: 100%;
}
</style>

MenuItems.vue

<template><template v-for="item in items" :key="item.id"><el-sub-menu v-if="item.children && item.children.length > 0" :index="item.path"><template #title><span>{{ item.name }}</span></template><!-- 递归遍历 --><menu-items :items="item.children" /></el-sub-menu><el-menu-item v-else :index="item.path"><span>{{ item.name }}</span></el-menu-item></template>
</template><script setup lang="ts">javascript">
interface MenuItem {id: number;name: string;path: string;icon?: string;component?: string;children?: MenuItem[];
}
defineProps<{items: MenuItem[];
}>()
</script>

结果如下所示

从图中可以看出，无论是一层，二层，三层，四层结构的树形数据，都可以在el-menu中展示。

关于遍历时图标前的展示后续完善

关于点击路由跳转参考element plus的官网即可