一 Typecript and React

一安装

$ npx create-react-app my-app --template typescript

[0]:https://create-react-app.bootcss.com/docs/adding-typescript

二经典代码段

Hello.tsx

tsx

import React from "react";

interface IHelloProps{
    message ?:string
}

const Hello:React.FC<IHelloProps> = (props) => {
  return (
    <div>{props.message}</div>
  )
}

Hello.defaultProps = {
    message :"Hello World"
}

export default Hello