使用官方案例@babel/plugin-syntax-dynamic-import · Babel (babeljs.io)https://babeljs.io/docs/en/babel-plugin-syntax-dynamic-import/

 

 安装完后在项目中

填如下代码

'@babel/plugin-syntax-dynamic-import'

 

 安装官方的案例更改路由代码

 懒加载可以提高运行效率

如下

login_home_welcome三个组件为一组

 例子:

// import Login from '@/components/LoginL.vue'
const Login = () => import(/* webpackChunkName: "login_home_welcome" */ '@/components/LoginL.vue')
// import Home from '@/components/HomeL.vue'
const Home = () => import(/* webpackChunkName: "login_home_welcome" */ '@/components/HomeL.vue')
// import WelCome from '@/components/WelCome.vue'
const WelCome = () => import(/* webpackChunkName: "login_home_welcome" */ '@/components/WelCome.vue')

这样就实现了路由的懒加载，提高运行效率

下面的路由还是之前的引用

总结:

具体需要3步:
①安装@babe/plugin syntax dynamic import包。
⑦在babel.configjs配置文件中声明该插件。
③将路由改为按需加载的形式，示例代码如下:
const FoO - () -> import (/* webpackChunkName: "group-foo" */ './Foo.vue')
const Bar - ()一> import (/* webpackChunkName: "group-foo" */ './Bar. vue')
const Baz - ()一> import (/* webpackChunkName: "group-boo" */ './Baz. vue')

希望对大家有所帮助
以下参考

import Vue from 'vue'
import VueRouter from 'vue-router'
// import Login from '../components/Login.vue'
// import Home from '../components/Home.vue'
// import Welcome from '../components/Welcome.vue'
// import Users from '../components/user/Users.vue'
// import Rights from '../components/power/Rights.vue'
// import Roles from '../components/power/Roles.vue'
// import Cate from '../components/goods/Cate.vue'
// import Params from '../components/goods/Params.vue'

const Login = () => import(/* webpackChunkName: "login_home_welcome" */ '../components/Login.vue')
const Home = () => import(/* webpackChunkName: "login_home_welcome" */ '../components/Home.vue')
const Welcome = () => import(/* webpackChunkName: "login_home_welcome" */ '../components/Welcome.vue')

const Users = () => import(/* webpackChunkName: "Users_Rights_Roles" */ '../components/user/Users.vue')
const Rights = () => import(/* webpackChunkName: "Users_Rights_Roles" */ '../components/power/Rights.vue')
const Roles = () => import(/* webpackChunkName: "Users_Rights_Roles" */ '../components/power/Roles.vue')

const Cate = () => import(/* webpackChunkName: "Cate_Params" */ '../components/goods/Cate')
const Params = () => import(/* webpackChunkName: "Cate_Params" */ '../components/goods/Params')

const GoodsList = () => import(/* webpackChunkName: "GoodsList_Add" */ '../components/goods/List')
const Add = () => import(/* webpackChunkName: "GoodsList_Add" */ '../components/goods/Add')

const Order = () => import(/* webpackChunkName: "Order_Report" */ '../components/order/Order')
const Report = () => import(/* webpackChunkName: "Order_Report" */ '../components/report/Report')

Vue.use(VueRouter)

const router = new VueRouter({
  routes: [
    {
      path: '/',
      redirect: '/login'
    },
    {
      path: '/login',
      component: Login
    }, {
      path: '/home',
      redirect: '/welcome',
      component: Home,
      children: [
        {
          path: '/welcome',
          component: Welcome
        },
        {
          path: '/users',
          // component: () => import('@/components/user/Users.vue')
          component: Users
        },
        {
          path: '/rights',
          // component: () => import('@/components/power/Rights.vue')
          component: Rights
        },
        {
          path: '/roles',
          // component: () => import('@/components/power/Roles.vue')
          component: Roles
        },
        {
          path: '/categories',
          // component: () => import('@/components/goods/Cate.vue')
          component: Cate
        },
        {
          path: '/params',
          // component: () => import('@/components/goods/Params.vue')
          component: Params
        },
        {
          path: '/goods',
          // component: () => import('@/components/goods/List.vue')
          component: GoodsList
        },
        {
          path: '/goods/add',
          // component: () => import('@/components/goods/Add.vue')
          component: Add
        },
        {
          path: '/orders',
          // component: () => import('@/components/order/Order.vue')
          component: Order
        },
        {
          path: '/reports',
          // component: () => import('@/components/report/Report.vue')
          component: Report
        }
      ]
    }]
})

// 挂载路由导航守卫
router.beforeEach((to, from, next) => {
  // to   将要访问的路径
  // from 代表从按个路径跳转而来
  // next 是一个函数, 表示放行
  //      next() 放行  next('/login') 强行跳转
  if (to.path === '/login') {
    return next()
  }
  // 获取token
  const tokenStr = window.sessionStorage.getItem('token')
  if (!tokenStr) {
    return next('/login')
  }
  next()
})

export default router