解决router.beforeEach()动态加载路由出现死循环问题

const routerList = [{
    path: '/',
    component: Layout,
    redirect: '/dashboard',
    auth: [0, 1, 2],
    meta: {
      title: '首页',
      icon: 'dashboard'
    },
    children: [{
      path: 'dashboard',
      name: 'Dashboard',
      component: () => import('@/views/dashboard/index'),
      meta: {
        title: '首页',
        icon: 'dashboard'
      },
      auth: [0, 1, 2]
    }]
  },
  {
    path: '/enterprises',
    component: Layout,
    name: 'Enterprises',
    redirect: 'noRedirect',
    auth: [0, 1, 2],
    meta: {
      title: '智慧园区',
      icon: 'el-icon-office-building'
    },
    children: [
      {
        path: 'huanjingjiance',
        name: 'huanjingjiance',
        component: () => import('@/views/environment/monitor'),
        auth: [0, 2],
        meta: {
          title: '环境监测'
        },
      }
    ]
  },
  {
    path: '/user',
    component: Layout,
    name: 'User',
    redirect: 'noRedirect',
    auth: [0, 1],
    meta: {
      title: '人员信息',
      icon: 'el-icon-user'
    },
    children: [{
      path: 'index',
      name: 'Index',
      component: () => import('@/views/user/index'),
      meta: {
        title: '个人信息'
      },
      auth: [0, 1],
    }]
  }
]

const constantRoutes = [
  {
    path: '/login',
    component: () => import('@/views/login/index'),
    hidden: true
  },
  ...dynamicRouter
]

var createRouter = () => new Router({
  mode: 'history',
  scrollBehavior: () => ({
    y: 0
  }),
  routes: constantRoutes
})