vue-learn/src/router/router.js

import Vue from 'vue'
import VueRouter from 'vue-router'
import Login from '../components/Login'
import Home from '../components/Home'
import welcome from '../components/welcome'
import users from '../components/users/users'
import access from '../components/access/access'
import roles from '../components/access/roles'

Vue.use(VueRouter)

const routes = [
  { path: '/', redirect: '/login' },
  { path: '/login', component: Login },
  {
    path: '/home',
    component: Home,
    redirect: '/welcome',
    children: [
      { path: '/welcome', component: welcome },
      { path: '/users', component: users },
      { path: '/rights', component: access },
      { path: '/roles', component: roles }
    ]
  }
]

const router = new VueRouter({
  routes
})
router.beforeEach((to, from, next) => {
  if (to.path === '/login') {
    return next()
  }
  const token = sessionStorage.getItem('token')
  if (!token) {
    return next('/login')
  }
  next()
})
export default router