解析vue路由异步组件和懒加载案例

first

<template> 

<div>我是第一个页面</div> 

</template>

 

second

<template> 

<div>我是第二个页面</div> 

</template>

 

three

<template> 

<div>我是第三个页面</div> 

</template>

four
<template> 
<div>我是第四个页面</div> 
</template>

import Vue from 'vue'

import VueRouter from 'vue-router'

/*import First from '@/components/First' 

import Second from '@/components/Second'*/

  

Vue.use(VueRouter) 

//方案1

const first =()=>import(/* webpackChunkName: "group-foo" */ "../components/first.vue");

const second = ()=>import(/* webpackChunkName: "group-foo" */ "../components/second.vue");

const three = ()=>import(/* webpackChunkName: "group-fooo" */ "../components/three.vue");

const four = ()=>import(/* webpackChunkName: "group-fooo" */ "../components/four.vue");

//方案2

const first = r => require.ensure([], () => r(require('../components/first.vue')), 'chunkname1')

const second = r => require.ensure([], () => r(require('../components/second.vue')), 'chunkname1')

const three = r => require.ensure([], () => r(require('../components/three.vue')), 'chunkname2')

const four = r => require.ensure([], () => r(require('../components/four.vue')), 'chunkname2')

 

//懒加载路由 

const routes = [ 

 {  //当首次进入页面时，页面没有显示任何组件；让页面一加载进来就默认显示first页面 

 path:'/', //重定向，就是给它重新指定一个方向，加载一个组件； 

 component:first 

 }, 

 { 

 path:'/first', 

 component:first

 }, 

 { 

 path:'/second', 

 component:second

 }, { 

 path:'/three', 

 component:three

 }, 

 { 

 path:'/four', 

 component:four

 } 

//这里require组件路径根据自己的配置引入 

] 

//最后创建router 对路由进行管理，它是由构造函数 new vueRouter() 创建，接受routes 参数。 

  

 const router = new VueRouter({ 

 routes 

}) 
export default router;