vue路由守卫用于登录验证权限拦截

vue路由守卫用于登录验证权限拦截

vue路由守卫 - 全局（router.beforeEach((to, from, next) =>来判断登录和路由跳转状态）

主要方法：

• to：进入到哪个路由去
• from：从哪个路由离开
• next：路由的控制参数，常用的有next(true)和next(false)

首先判断进入的是否是login页面？然后再判断是否已经登陆？
已经登陆了就进入你要跳转的页面，没登录就进入login页面

router路由设置

index.js

import Vue from 'vue' import VueRouter from 'vue-router' import HomeView from '../views/HomeView.vue'    Vue.use(VueRouter)  const originalPush = VueRouter.prototype.push    VueRouter.prototype.push = function push(location) {    return originalPush.call(this, location).catch(err => err) }  const routes = [   {     path: '/',     name: 'login',     component: ()=>import('../views/Login/LoginView.vue')   },   {     path: '/register',     name: '注册',     component: ()=>import('../views/Register/RegisterView.vue')   },   {     path: '/index',     name: 'index',     component: ()=>import('../views/Index/Index.vue'),     // redirect:'/manage',     children:[       {         path: '/manage',         name: '图书管理',         component:  ()=>import('../views/Manage/Manage.vue')       },     ]   },   {     path: '/about',     name: 'about',     // route level code-splitting     // this generates a separate chunk (about.[hash].js) for this route     // which is lazy-loaded when the route is visited.     component: () => import(/* webpackChunkName: "about" */ '../views/AboutView.vue')   } ]  const router = new VueRouter({   routes });  router.beforeEach((to, from, next) => {   const isLogin = window.localStorage.getItem('main'); //获取本地存储的登陆信息   console.log(isLogin)   console.log("to:"+to.name) //进入到哪个路由去   console.log("from:"+from) //从哪个路由离开   //next：路由的控制参数，常用的有next(true)和next(false)   //next() 直接进to 所指路由   //next('route') 跳转指定路由   if (to.name == 'login') { //判断是否进入的login页     if (isLogin) {  //判断是否登陆       next({ name: 'index' });  //已登录，跳转首页     } else {       next();  //没登录，继续进入login页     }   } else { //如果进入的非login页     if (isLogin) {   //同样判断是否登陆       next();  //已登录，正常进入当前页面     } else {       next({ name: 'login'});  //没登录，跳转到login页     }   } });   export default router