/** * Copyright (c) Facebook, Inc. and its affiliates. * * This source code is licensed under the MIT license found in the * LICENSE file in the root directory of this source tree. * * @flow */ import 'regenerator-runtime/runtime'; import * as React from 'react'; // $FlowFixMe Flow does not yet know about createRoot() import {createRoot} from 'react-dom'; import nullthrows from 'nullthrows'; import App from './App'; import styles from './index.css'; const container = document.createElement('div'); container.className = styles.Container; container.id = 'root'; const body = nullthrows(document.body, 'Expect document.body to exist'); body.appendChild(container); createRoot(container).render( , );