vue路由導航守衛控制訪問權限

 

import Vue from 'vue'
import VueRouter from 'vue-router'
import Login from '../components/Login.vue'
import Home from '../components/Home.vue'
Vue.use(VueRouter)

const routes = [
  {
    path: '/',
    redirect: '/login'
    // 重定向
  },
  {
    path: '/login',
    component: Login
  },
  {
    path: '/home',
    component: Home
  }
]

const router = new VueRouter({
  routes
})
//掛載路由導航守衛
router.beforeEach((to, from, next) => {
  //to 將要訪問的路徑
  //from 代表從哪個路徑跳轉而來
  //next 是一個函數，表示放行
  //  next() 放行    next('/login') 強制跳轉
  // console.log(to)
  // console.log(from)
  if (to.path === '/login') return next()
  const tokenStr = window.sessionStorage.getItem('token')
  if (!tokenStr) return next('/login')
  next()
})
export default router