[React] 실습 - 시계 만들기

- Clock.jsx import React from "react"; function Clock(props) { return ( 안녕, 리액트! 현재 시간: {new Date().toLocaleTimeString()} ); } export default Clock; - index.js import React from 'react'; import ReactDOM from 'react-dom/client'; import './index.css'; import App from './App'; import reportWebVitals from './reportWebVitals'; import Clock from './chapter_04/Clock'; const root = ReactDOM.createRoot(d..