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