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