vue-admin-template、vue-element-admin配置动态菜单，菜单数据从后台获取。
我在网上search了几个小时也没有找到想要的emm，翻官网也没有说明，只说明了路由覆盖。只能自己手撸试调，并实现了该功能。因为场景一般都是根据不同角色访问不同菜单的。
首先这是我后台传来的菜单：

{
    "code":0,
    "msg":null,
    "data":[
        {
            "id":1,
            "parentId":0,
            "title":"仪表盘",
            "path":"/dashboard",
            "icon":"dashboard",
            "sortNumber":1,
            "status":"1"
        },
        {
            "id":2,
            "parentId":0,
            "title":"表单",
            "path":"/form/index",
            "icon":"form",
            "sortNumber":2,
            "status":"1"
        },
        {
            "id":3,
            "parentId":0,
            "title":"nested",
            "path":"/nested",
            "icon":"nested",
            "sortNumber":1,
            "status":"1"
        },
        {
            "id":4,
            "parentId":3,
            "title":"menu1",
            "path":"/menu1",
            "icon":null,
            "sortNumber":1,
            "status":"1"
        },
        {
            "id":7,
            "parentId":3,
            "title":"menu2",
            "path":"/nested/menu2",
            "icon":null,
            "sortNumber":2,
            "status":"1"
        },
        {
            "id":5,
            "parentId":4,
            "title":"menu1-1",
            "path":"/nested/menu1/menu1-1",
            "icon":null,
            "sortNumber":1,
            "status":"1"
        },
        {
            "id":6,
            "parentId":4,
            "title":"menu1-2",
            "path":"/nested/menu1/menu1-2",
            "icon":null,
            "sortNumber":2,
            "status":"1"
        }
    ]
}

在api中定义了获取菜单的请求函数

export function getMenus() {
  return request({
    url: '/user/menus',
    method: 'get'
  })
}

在src\layout\components\Sidebar\index.vue中

// 修改路由遍历，变量为 requestMenus
<sidebar-item v-for="route in requestMenus" :key="route.path" :item="route" :base-path="route.path" />

// 导入获取菜单请求
import { getMenus } from '@/api/user'

  data() {
    return {
      requestMenus: [] // 自定义的菜单变量
    }
  },
  // ...其他不变
  
  created() {
    // 页面创建时获取菜单，算是初始化
    this.menus()
  },
  methods: {
    menus() {
      getMenus().then(res => {
        this.requestMenus = this.listToTree(res.data, 0)
      })
    }, listToTree(list, parentId) { // 递归转换
      const tree = []
      for (let i = 0; i < list.length; i++) {
        const temp = list[i]
        temp.meta = { title: temp.title, icon: temp.icon }
        if (temp.parentId === parentId) {
          // 递归子节点
          temp.children = this.listToTree(list, temp.id)
          tree.push(temp)
        }
      }
      return tree
    }
  }

以上配置的前提是router/index.js中的路由，能匹配后台传来路由路径。原来写死的路由配置我没有修改过
效果