vue中的懒加载和按需加载
懒加载
(1)定义:懒加载也叫延迟加载,即在需要的时候进行加载,随用随载。
(2)异步加载的三种表示方法:
1. resolve => require([URL], resolve),支持性好 2. () => system.import(URL) , webpack2官网上已经声明将逐渐废除,不推荐使用 3. () => import(URL), webpack2官网推荐使用,属于es7范畴,需要配合babel的syntax-dynamic-
export default new Router({
routes:[ {
path: '/my', name: 'my', //懒加载 component: resolve => require(['../page/my/my.vue'], resolve), }, ] })
2.组件懒加载:
components: {
historyTab:resolve => {
require(['../../component/historyTab/historyTab.vue'],resolve) }, },
3.全局懒加载
Vue.component('mideaHeader', () => {
System.import('./component/header/header.vue') })
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