React

```js // setupProxy.js //yarn add http-proxy-middleware const { createProxyMiddleware } = require('h

1.module.js 2.context.jsx 3.child1,jsx 4.child2.jsx

```js {/* 第一种 异步加载组件 */} const UseContext = React.lazy(() => import('./views/Context.jsx'));//往impor

import React from "react"; import { useMemo } from "react"; function Abc({arr}) {     console.log(99