实现思路主要组件嵌套（组件自己调用自己）

　　下面是组件所需要的数据

{ "code": 1, "data": { "menuVoList": [ { "childList": [ { "childList": [], "menu": { "createBy": "0-1", "createTime": 1587610158, "id": "2f006aed6a114579bd8b9809724428f7", "name": "系统用户权限管理", "parentId": "6d68079a16b94292990f612237bd048e", "path": "/userallotrole", "updateBy": "0-1", "updateTime": 1587610221 } }, { "childList": [], "menu": { "createBy": "0-1", "createTime": 1587605059, "id": "c948265cdf27420eb7b6b502292c5990", "name": "系统用户管理", "parentId": "6d68079a16b94292990f612237bd048e", "path": "/user", "updateBy": "0-1", "updateTime": 1587610230 } } ], "menu": { "createBy": "0-1", "createTime": 1587605025, "id": "6d68079a16b94292990f612237bd048e", "name": "用户管理", "parentId": "", "path": "/#", "updateBy": "0-1", "updateTime": 1587610117 } }, { "childList": [ { "childList": [], "menu": { "createBy": "0-1", "createTime": 1587469457, "id": "d4b70897052742bb860cf14cea8cf131", "name": "新建/修改菜单", "parentId": "82e5ca1ab2e04d8faffeb973286771ec", "path": "/newMenu", "updateBy": "0-1", "updateTime": 1587469457 } } ], "menu": { "createBy": "0-1", "createTime": 1587469385, "id": "82e5ca1ab2e04d8faffeb973286771ec", "name": "菜单管理", "parentId": "", "path": "", "updateBy": "0-1", "updateTime": 1587469426 } }, { "childList": [ { "childList": [], "menu": { "createBy": "0-1", "createTime": 1587468494, "id": "3a092edd120d40b79322d8486e53e5a1", "name": "系统角色管理", "parentId": "ce5704f647d341fe8334ad12c6dd4a6b", "path": "/setrole", "updateBy": "0-1", "updateTime": 1587469340 } }, { "childList": [], "menu": { "createBy": "0-1", "createTime": 1587469360, "id": "61d0e4fecbed407d89b1ea5878072374", "name": "设置角色权限", "parentId": "ce5704f647d341fe8334ad12c6dd4a6b", "path": "/authorization", "updateBy": "0-1", "updateTime": 1587469360 } }, { "childList": [], "menu": { "createBy": "0-1", "createTime": 1587469520, "id": "a1a2f6bcbfba4a7f9178ef03ea0fe5b0", "name": "权限管理", "parentId": "ce5704f647d341fe8334ad12c6dd4a6b", "path": "/resource", "updateBy": "0-1", "updateTime": 1587624251 } } ], "menu": { "createBy": "0-1", "createTime": 1587468417, "id": "ce5704f647d341fe8334ad12c6dd4a6b", "name": "角色管理", "parentId": "", "path": "", "updateBy": "0-1", "updateTime": 1587468417 } } ] }, "message": "成功"}

　现在我们来设置组件 （在 componet 文件夹里面建一个 menu.vue） 代码如下

<template> <div> <template v-for="value in menuData"> <el-submenu v-if="value.childList.length > '0'" :index="value.menu.name"> //判断传进来的数据中 childList 数组length 是否大于零， 如果大于零表示 不是不需要在循环下去了 <template slot="title"> <i class="el-icon-s-tools" /> <span slot="title">{{ value.menu.name }}</span> </template> <MenuTree :menu-data="value.childList" /> </el-submenu> <el-menu-item v-else :index="value.menu.path"> <span slot="title">{{ value.menu.name }}</span> </el-menu-item> </template> </div></template><script>export default { name: 'MenuTree', props: ['menuData']}</script><style lang="scss" >.el-submenu__title i { color: #fff;}.el-menu--collapse { width: 54px;}</style>

　　接下来 在需要使用 menu 组件的地方引入刚才定义的组件

<template> <el-menu class="el-menu-vertical-demo" :collapse="isCollapse" background-color="#4A5A74" active-text-color="#ffd04b" text-color="#fff" :unique-opened="true" :default-active="this.$route.path" @select="handleSelect" > <menuTree :menu-data="list" /> </el-menu></template> import menuTree from '@/component/menu'export default{ components: { menuTree },data: { list: [] },methods: { getMenuList({}).then(res => { //我这里是请求后台得来得数据，没有数据直接用我上面得数据，不过得像我下面这样处理 if (res.status === 200) { this.list = res.data.data.menuVoList } })}}

　这样，em-menu 组件的无限极循环便实现了，注意，我 上面代码中 el-menu 的属性可能多了一些，请根据自己需要删除

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