Shulou(Shulou.com)06/02 Report--

Today, I would like to share with you the relevant knowledge about the changes in Vue3 asynchronous components. The content is detailed and the logic is clear. I believe most people still know too much about this knowledge, so share this article for your reference. I hope you can get something after reading this article.

First, let's take a look at the changes in asynchronous components:

A new method, defineAsyncComponent, has been added to explicitly define asynchronous components

Rename the component option: loader

The Loader function no longer accepts resolve and reject as arguments, and must return a Promise

Used to be asynchronous components

In Vue 2.x, it is convenient to define an asynchronous component:

Const asyncPage = () = > import ('. / HugePageComponent.vue')

If you need some advanced usage (I bet you don't know it for fifty cents):

Import {ErrorComponent, LoadingComponent} from 'xxx'; const asyncPage = {component: () = > import ('. / HugePageComponent'), delay: 1000, timeout: 3000, error: ErrorComponent, loading: LoadingComponent,}

Upcoming Vue 3 Asynchronous components

Because functional components are defined by ordinary functions in Vue 3, asynchronous components need to be explicitly defined through defineAsyncComponent.

Import {defineAsyncComponent} from 'vue'; import {ErrorComponent, LoadingComponent} from' xxx'

/ / General usage const asyncPage = defineAsyncComponent (() = > import ('. / HugePageComponent')); / / Advanced usage const asyncPageWithOptions = defineAsyncComponent ({/ / here was component, but now it is loader: () = > import ('. / HugePageComponent'), delay: 1000, timeout: 3000, errorComponent: ErrorComponent, loadingComponent: LoadingComponent,})

In addition, unlike Vue 2.x, the loader function no longer provides resolve and reject as default parameters, and must return a Promise:

/ / 2.x version const oldAsyncComponent = (resolve, reject) = > {/... /}

/ / 3.x version const newAsyncComponent = defineAsyncComponent (() = > {return new Promise ((resolve, reject) = > {/ *... * /});}); these are all the contents of the article "what are the changes in Vue3 Asynchronous components?" Thank you for reading! I believe you will gain a lot after reading this article. The editor will update different knowledge for you every day. If you want to learn more knowledge, please pay attention to the industry information channel.

Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.