vue要做权限管理该怎么做？如果控制到按钮级别的权限怎么做？

axios.interceptors.request.use(config => {     config.headers['token'] = cookie.get('token')     return config }) axios.interceptors.response.use(res=>{},{response}=>{     if (response.data.code === 40099 || response.data.code === 40098) { //token过期或者错误         router.push('/login')     } })

const routerMap = [   {     path: '/permission',     component: Layout,     redirect: '/permission/index',     alwaysShow: true, // will always show the root menu     meta: {       title: 'permission',       icon: 'lock',       roles: ['admin', 'editor'] // you can set roles in root nav     },     children: [{       path: 'page',       component: () => import('@/views/permission/page'),       name: 'pagePermission',       meta: {         title: 'pagePermission',         roles: ['admin'] // or you can only set roles in sub nav       }     }, {       path: 'directive',       component: () => import('@/views/permission/directive'),       name: 'directivePermission',       meta: {         title: 'directivePermission'         // if do not set roles, means: this page does not require permission       }     }]   }]

import router from './router' import store from './store' import { Message } from 'element-ui' import NProgress from 'nprogress' // progress bar import 'nprogress/nprogress.css'// progress bar style import { getToken } from '@/utils/auth' // getToken from cookie  NProgress.configure({ showSpinner: false })// NProgress Configuration  // permission judge function function hasPermission(roles, permissionRoles) {   if (roles.indexOf('admin') >= 0) return true // admin permission passed directly   if (!permissionRoles) return true   return roles.some(role => permissionRoles.indexOf(role) >= 0) }  const whiteList = ['/login', '/authredirect']// no redirect whitelist  router.beforeEach((to, from, next) => {   NProgress.start() // start progress bar   if (getToken()) { // determine if there has token     /* has token*/     if (to.path === '/login') {       next({ path: '/' })       NProgress.done() // if current page is dashboard will not trigger	afterEach hook, so manually handle it     } else {       if (store.getters.roles.length === 0) { // 判断当前用户是否已拉取完user_info信息         store.dispatch('GetUserInfo').then(res => { // 拉取user_info           const roles = res.data.roles // note: roles must be a array! such as: ['editor','develop']           store.dispatch('GenerateRoutes', { roles }).then(() => { // 根据roles权限生成可访问的路由表             router.addRoutes(store.getters.addRouters) // 动态添加可访问路由表             next({ ...to, replace: true }) // hack方法 确保addRoutes已完成 ,set the replace: true so the navigation will not leave a history record           })         }).catch((err) => {           store.dispatch('FedLogOut').then(() => {             Message.error(err || 'Verification failed, please login again')             next({ path: '/' })           })         })       } else {         // 没有动态改变权限的需求可直接next() 删除下方权限判断 ↓         if (hasPermission(store.getters.roles, to.meta.roles)) {           next()//         } else {           next({ path: '/401', replace: true, query: { noGoBack: true }})         }         // 可删 ↑       }     }   } else {     /* has no token*/     if (whiteList.indexOf(to.path) !== -1) { // 在免登录白名单，直接进入       next()     } else {       next('/login') // 否则全部重定向到登录页       NProgress.done() // if current page is login will not trigger afterEach hook, so manually handle it     }   } })  router.afterEach(() => {   NProgress.done() // finish progress bar })

{     name: "login",     path: "/login",     component: () => import("@/pages/Login.vue") }

function hasPermission(router, accessMenu) {   if (whiteList.indexOf(router.path) !== -1) {     return true;   }   let menu = Util.getMenuByName(router.name, accessMenu);   if (menu.name) {     return true;   }   return false;  }  Router.beforeEach(async (to, from, next) => {   if (getToken()) {     let userInfo = store.state.user.userInfo;     if (!userInfo.name) {       try {         await store.dispatch("GetUserInfo")         await store.dispatch('updateAccessMenu')         if (to.path === '/login') {           next({ name: 'home_index' })         } else {           //Util.toDefaultPage([...routers], to.name, router, next);           next({ ...to, replace: true })//菜单权限更新完成,重新进一次当前路由         }       }         catch (e) {         if (whiteList.indexOf(to.path) !== -1) { // 在免登录白名单，直接进入           next()         } else {           next('/login')         }       }     } else {       if (to.path === '/login') {         next({ name: 'home_index' })       } else {         if (hasPermission(to, store.getters.accessMenu)) {           Util.toDefaultPage(store.getters.accessMenu,to, routes, next);         } else {           next({ path: '/403',replace:true })         }       }     }   } else {     if (whiteList.indexOf(to.path) !== -1) { // 在免登录白名单，直接进入       next()     } else {       next('/login')     }   }   let menu = Util.getMenuByName(to.name, store.getters.accessMenu);   Util.title(menu.title); });  Router.afterEach((to) => {   window.scrollTo(0, 0); });

const Home = () => import("../pages/Home.vue"); const UserInfo = () => import("../pages/UserInfo.vue"); export default {     home: Home,     userInfo: UserInfo };

[     {         name: "home",         path: "/",         component: "home"     },     {         name: "home",         path: "/userinfo",         component: "userInfo"     } ]

{     path: '/permission',     component: Layout,     name: '权限测试',     meta: {         btnPermissions: ['admin', 'supper', 'normal']     },     //页面需要的权限     children: [{         path: 'supper',         component: _import('system/supper'),         name: '权限测试页',         meta: {             btnPermissions: ['admin', 'supper']         } //页面需要的权限     },     {         path: 'normal',         component: _import('system/normal'),         name: '权限测试页',         meta: {             btnPermissions: ['admin']         } //页面需要的权限     }] }

import Vue from 'vue' /**权限指令**/ const has = Vue.directive('has', {     bind: function (el, binding, vnode) {         // 获取页面按钮权限         let btnPermissionsArr = [];         if(binding.value){             // 如果指令传值，获取指令参数，根据指令参数和当前登录人按钮权限做比较。             btnPermissionsArr = Array.of(binding.value);         }else{             // 否则获取路由中的参数，根据路由的btnPermissionsArr和当前登录人按钮权限做比较。             btnPermissionsArr = vnode.context.$route.meta.btnPermissions;         }         if (!Vue.prototype.$_has(btnPermissionsArr)) {             el.parentNode.removeChild(el);         }     } }); // 权限检查方法 Vue.prototype.$_has = function (value) {     let isExist = false;     // 获取用户按钮权限     let btnPermissionsStr = sessionStorage.getItem("btnPermissions");     if (btnPermissionsStr == undefined || btnPermissionsStr == null) {         return false;     }     if (value.indexOf(btnPermissionsStr) > -1) {         isExist = true;     }     return isExist; }; export {has}

<el-button @click='editClick' type="primary" v-has>编辑</el-button>