zbailing的博客

简短的函数体通常省略 {}const Home = lazy( () => import('./routes/Home') );const About = lazy( () => import('./routes/About') );如果不想省略{} 必须加上 return ，不然会报错const Home = lazy( () => { return import('./routes/Home') } );const About = lazy( () => {

在src下新建公共方法math.jsexport function add (a, b) { return a + b;}在src下App.js中引用该方法import './App.css';import { add } from './math';function App() { return ( <div> { add(3,3) } </div> );}export default App;总结：与