首次协调时,workInProgress 节点不含有 DidCapture 的 flags,所以进入 mountSuspensePrimaryChildren() 逻辑中。Suspense 此时将 primary 组件作为子节点: function mountSuspensePrimaryChildren( workInProgress, primaryChildren, renderLanes, ) { const mode = workInProgress.mode; const primaryChildProps: Offscreen...
AI代码解释 // src/global.tsximport{Modal,Result}from'antd';importReactfrom'react';constoriginLazy=React.lazy;React.lazy=(factory)=>{returnoriginLazy(()=>factory().catch(loadError));};lethasError=false;functionloadError():{default:React.ComponentType<unknown>}{consttime=Number(window.location....
In React, code-splitting is typically achieved through dynamic imports and the use of React’s React.lazy() function along with the <Suspense> component. Here’s an example of how to implement code-splitting in React. Step 1: Create Components Create multiple components that you want to code...
import{lazy,Suspense}from'react';import{BrowserRouterasRouter,Link,Route,Switch}from'react-router-dom';constHome=lazy(()=>import('./Home'));constLargePage=lazy(()=>import('./LargePage'));exportfunctionApp(){return(<Router><Linkto="/">Home</Link><Linkto="/large-page">Large Page</Link...
首先看readLazyComponentType函数,其参数elementType为上面打印出的对象,返回懒加载的组件,下面列出了关键代码,_thenable执行ctor()异步函数,拿到import的组件函数即f home(),拿到后暂存于workInProgress.type: function readLazyComponentType(lazyComponent) {
2.React的懒加载 示例代码: import React, { Suspense } from 'react'; const OtherComponent = React.lazy(() => import('./OtherComponent')); function MyComponent() { return ( <Suspense fallback={Loading...}> <OtherComponent /> </Suspense> ); } 如上代码中,通过 import() 、React...
其实react.memo的实现很简单,就几行代码。1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 export default function memo<Props>( type: React$ElementType,compare?: (oldProps: Props, newProps: Props) => boolean, ) { if (__DEV__) {...
import React, { Suspense } from 'react'; const OtherComponent = React.lazy(() => import('./OtherComponent')); function MyComponent() { return ( <Suspense fallback={Loading...}> <OtherComponent /> </Suspense> ); } Copy React JSX DownloadExample: Route-based code splitting...
Note that the following approach is intended for client-side-rendered (CSR) web projects that run all their code in a browser. React.lazy() TheReact.lazy()function allows you to render a dynamic import as a normal component. It makes it simple to construct components that are loaded dynamic...
不用太清楚类似于fetch import {unstable_createResource} from 'react-cache'; // 声明请求数据的方法 const TodoResource = unstable_createResource(fetchTodo); //内部请求TodoResource.read(props.id) 就是异步请求数据 function Todo(props) { // Suspends until the data is in the cache const todo = ...