import * as React from 'react' ; import './App.css' ; import logo from './logo.svg' ; class App extends React . Component { public render ( ) { return ( < div className = "App" > < header className = "App-header" > < img src = { logo } className = "App-logo" alt = "logo" / > < h1 className = "App-title" > こんにちはReact < /h1> < /header> < p className = "App-intro" > Hello , World ! < /p> < /div>); } } export default App ;