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需要编写两个文件 aside-menu.vue 和 menu-item.vue

1. menu-item.vue

<script setup>
defineOptions({name: 'MenuItem'})
defineProps({menuList: Array})
</script><template><template v-for="menu of menuList"><!-- 如果当前有子菜单，且子菜单只有一个时 --><el-menu-item v-if="menu.children && menu.children.length === 1" :index="menu.path"><el-icon><component :is="menu?.meta?.icon"></component></el-icon><template #title><span>{{ menu.children[0]?.meta?.title }}</span></template></el-menu-item><!-- 如果当前有子菜单，且子菜单大于一个时 --><el-sub-menuv-if="menu.children && menu.children.length > 1":index="menu.path"><template #title><el-icon><component :is="menu?.meta?.icon"></component></el-icon><span>{{ menu?.meta?.title }}</span></template><!-- 调用自身  此处是重点--><MenuItem :menuList="menu.children"></MenuItem></el-sub-menu><!-- 如果没有子菜单，则显示当前内容 --><el-menu-item v-if="!menu.children || menu.children.length===0" :index="menu.path"><el-icon><component :is="menu?.meta?.icon"></component></el-icon><template #title><span>{{ menu?.meta?.title }}</span></template></el-menu-item></template>
</template><style lang="scss" scoped></style>

2. aside-menu.vue （menuList在该组件中请求后端接口获取）

<script setup>
import MenuItem from "./menu-item.vue";defineProps({isCollapse: {type: Boolean,default: true}
})
// 菜单列表
let menuList =[{path: '/',name: 'Layout',redirect: '/home',component: '/views/layout/index',meta: {title: 'Layout',icon: 'HomeFilled',hidden: false},children: [{path: '/home',name: 'Home',component: '/views/home/index',meta: {title: '首页',icon: 'HomeFilled',hidden: false}},]},{path: '/sys',name: 'Sys',component: '/views/layout/index',meta: {title: '系统管理',icon: 'document',hidden: false},children: [{path: '/sys/user',name: 'User',component: '/views/sys/user/index',meta: {title: '用户管理',icon: 'document',hidden: false}},{path: '/sys/role',name: 'Role',component: '/views/sys/role/index',meta: {title: '角色管理',icon: 'document',hidden: false}},]}
]//通过递归 将 menuList 属性hidden为true的菜单及其子菜单过滤掉
function filterHiddenMenu(menuList) {return menuList.filter(menu => {if (menu.children) {menu.children = filterHiddenMenu(menu.children)}return !menu?.mata?.hidden})
}menuList = filterHiddenMenu(menuList)
</script><template><div><el-menu :collapse="isCollapse" :collapse-transition="false"><MenuItem :menu-list="menuList"></MenuItem></el-menu></div>
</template><style lang="scss" scoped>
.el-menu {height: 100%;width: 100%;
}
</style>

3. 使用我们编写的 aside-menu组件

<script setup>
import {ref} from "vue";
import AsideMenu from "./aside-menu/index.vue";// 是否折叠菜单，默认折叠
const isCollapse = ref(true)</script><template><AsideMenu :isCollapse="isCollapse"></AsideMenu>
</template><style scoped lang="scss">
</style>