import React from 'react' import ReactDOM from 'react-dom' // Your top level component import App from './App' // Export your top level component as JSX (for static rendering) export default App // Render your app if (typeof document !== 'undefined') { const renderMethod = module.hot ? ReactDOM.render : ReactDOM.hydrate || ReactDOM.render const render = (Comp: Function) => { renderMethod(, document.getElementById('root')) } // Render! render(App) // Hot Module Replacement if (module.hot) { module.hot.accept('./App', () => render(require('./App').default)) } }