本文介绍与 Suspense 在三种情景下使用方法,并结合源码进行相应解析.欢迎关注个人博客. Code Spliting 在 16.6 版本之前,code-spliting 通常是由第三方库来完成的,比如 react-loadble(核心思路为: 高阶组件 + webpack dynamic import), 在 16.6 版本中提供了 Suspense 和 lazy 这两个钩子, 因此在之后的版本中便可以使用其来实现 Code Spliting. 目前阶段, 服务端渲染中的 code-spl…

One approach to building high performance applications with webpack is to take advantage of code-splitting to only load the needed JavaScript on initial load and asynchronously load additional JavaScript bundles when needed. In this lesson, we'll cre…

Using Suspense within our component isn't exactly ergonomic. Let's put all that logic into a reusable function so we can create resources anytime we need them and for any asynchronous interaction in our app. In previous post, https://www.cnblogs.com/…

Error Boundaries are the way you handle errors with React, and Suspense embraces this completely. Let's take a look at how to handle asynchronous errors with Suspense and Error Boundaries. In previous post, we used React.Suspense with fallback (for l…

Let's get started with the simplest version of data fetching with React Suspense. It may feel a little awkward, but I promise you that you wont be writing your code like this. When Suspense is stable, there will be libraries that integrate with Suspe…

在React16.6中引入了React.lazy和React.Suspense,这两个组件,可以用来实现异步加载组件. 例如: const johanComponent = React.lazy(() => import(/* webpackChunkName: "johanComponent" */ './myAwesome.component')); export const johanAsyncComponent = props => ( <React.Susp…

React.lazy React.lazy 这个函数需要动态调用 import().它必须返回一个 Promise,该 Promise 需要 resolve 一个 defalut export 的 React 组件. 然后应在 React.Suspense 组件中渲染 lazy 组件,如此使得我们可以使用在等待加载 lazy 组件时做优雅降级(如 loading 指示器等). 比如: const OtherComponent = React.lazy(() => import('./OtherC…

React Suspense All In One 挂起让组件在渲染之前"等待"某些东西. 如今,Suspense仅支持一种用例:使用React.lazy动态加载组件. 将来,它将支持其他用例,例如数据获取. https://reactjs.org/docs/react-api.html#suspense https://reactjs.org/docs/code-splitting.html#reactlazy React.Suspense 挂起 React.lazy 懒加载 Rea…

简单介绍一下Suspense Suspense主要用来解决网络IO问题,它早在2018年的React 16.6.0版本中就已发布.它的相关用法有些已经比较成熟,有的相对不太稳定,甚至经历了重命名.删除: 在render函数中,我们可以写入一个异步请求,请求数据 react会从我们缓存中读取这个缓存 如果有缓存了,直接进行正常的render 如果没有缓存,那么会抛出一个异常,这个异常是一个promise 当这个promise完成后(请求数据完成),react会继续回到原来的render中(实际上是…

React 16.6 提供的一个新的开放一部分功能的 Suspense 代码 import React, { Suspense, lazy } from 'react' const LazyComp = lazy(() => import('./lazy.js')) let data = '' let promise = '' function requestData() { if (data) return data if (promise) throw promise promise = n…