react18-学习笔记23-第一个组件ts_学习

import React from "react";
interface IHelloProps{
    message?:string;
}
const Hello:React.FunctionComponent<IHelloProps>=(props)=>{
    return <h2>{props.message}</h2>
}

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

export default Hello