vue路由守衛用於登錄驗證許可權攔截

vue路由守衛用於登錄驗證許可權攔截

vue路由守衛 - 全局（router.beforeEach((to, from, next) =>來判斷登錄和路由跳轉狀態）

主要方法：

• to：進入到哪個路由去
• from：從哪個路由離開
• next：路由的控制參數，常用的有next(true)和next(false)

首先判斷進入的是否是login頁面？然後再判斷是否已經登陸？
已經登陸了就進入你要跳轉的頁面，沒登錄就進入login頁面

router路由設置

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: '註冊',
    component: ()=>import('../views/Register/RegisterView.vue')
  },
  {
    path: '/index',
    name: 'index',
    component: ()=>import('../views/Index/Index.vue'),
    // redirect:'/manage',
    children:[
      {
        path: '/manage',
        name: '圖書管理',
        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'); //獲取本地存儲的登陸信息
  console.log(isLogin)
  console.log("to:"+to.name) //進入到哪個路由去
  console.log("from:"+from) //從哪個路由離開
  //next：路由的控制參數，常用的有next(true)和next(false)
  //next() 直接進to 所指路由
  //next('route') 跳轉指定路由
  if (to.name == 'login') { //判斷是否進入的login頁
    if (isLogin) {  //判斷是否登陸
      next({ name: 'index' });  //已登錄，跳轉首頁
    } else {
      next();  //沒登錄，繼續進入login頁
    }
  } else { //如果進入的非login頁
    if (isLogin) {   //同樣判斷是否登陸
      next();  //已登錄，正常進入當前頁面
    } else {
      next({ name: 'login'});  //沒登錄，跳轉到login頁
    }
  }
});


export default router