便于对用户权限进行控制，后台的菜单可以做成动态。
在/src/layout/components/Sidebar/index.vue文件中就行修改

<template>
  <div :class="{'has-logo':showLogo}">
    <logo v-if="showLogo" :collapse="isCollapse" />
    <el-scrollbar wrap-class="scrollbar-wrapper">
      <el-menu
        :default-active="activeMenu"
        :collapse="isCollapse"
        :background-color="variables.menuBg"
        :text-color="variables.menuText"
        :unique-opened="false"
        :active-text-color="variables.menuActiveText"
        :collapse-transition="false"
        mode="vertical"
      >
        <!--<sidebar-item v-for="route in routes" :key="route.path" :item="route" :base-path="route.path" />-->
        <sidebar-item v-for="route in requestMenus" :key="route.path" :item="route" :base-path="route.path" />
      </el-menu>
    </el-scrollbar>
  </div>
</template>

<script>
import { mapGetters } from 'vuex'
import Logo from './Logo'
import SidebarItem from './SidebarItem'
import variables from '@/styles/variables.scss'
import {userMenu} from "@/api/user";
import Layout from "@/layout/index";

export default {
  components: { SidebarItem, Logo },
  data() {
    return {
      requestMenus: []
    }
  },
  created() {
    // 获取菜单路由数据
    userMenu().then(res => {
      const routeList = []
      this.handleMenu(routeList, res)
      // 首页公共
      routeList.unshift(
        {
          path: '/',
          component: Layout,
          children: [
            {
              path: 'dashboard',
              name: 'Dashboard',
              component: () => import('@/views/dashboard/index'),
              meta: { title: '首页', icon: 'dashboard' }
            }
          ]
        })
      this.$set(this, 'requestMenus', routeList)
    })
  },
  computed: {
    ...mapGetters([
      'sidebar'
    ]),
    routes() {
      return this.$router.options.routes
    },
    activeMenu() {
      const route = this.$route
      const { meta, path } = route
      // if set path, the sidebar will highlight the path you set
      if (meta.activeMenu) {
        return meta.activeMenu
      }
      return path
    },
    showLogo() {
      return this.$store.state.settings.sidebarLogo
    },
    variables() {
      return variables
    },
    isCollapse() {
      return !this.sidebar.opened
    }
  },

  methods: {
    handleMenu(list , data) {
      if (data.length > 0) {
        data.forEach(item => {
          const menu = {}
          if (item.is_leaf === 0) {  // 目录
            menu.path = '/' + item.code,
              menu.redirect = '/' + item.code + '/list',
              menu.name = item.code,
              menu.meta = {
                title: item.title,
                icon: item.icon
              },
              menu.children = []
          } else {  // 菜单
            menu.path = item.code,
              menu.name = item.code,
              menu.meta = {
                title: item.title,
                icon: item.icon
              }
          }
          if (item.children && item.children.length > 0) {
            this.handleMenu(menu.children, item.children)
          }
          list.push(menu)
        })
      }
    }
  }
}
</script>

注：

1. 获取的动态的菜单路由数据必须是在/src/router/index.js文件中已经配置好的
   获取的数据格式

[
    {
    "code":"example",
    "title":"EXample",
    "icon":"el-icon-s-help",
    "children":[
        {
            "code":"table",
            "title":"Table",
            "icon":"table",
        },
        {
            "code":"tree",
            "title":"Tree",
            "icon":"tree",
        }
    ]
}
]