import 'babel-polyfill'; import ReactDOM from 'react-dom'; import ReactDOMServer from 'react-dom/server'; import App from 'App'; const isCli = typeof window === 'undefined'; if (isCli) { module.exports = { default: (props) => ReactDOMServer.renderToStaticMarkup() }; } else { ReactDOM.render( , document.getElementById('app') ); }