/** @flow */ // This test harness mounts each test app as a separate root to test multi-root applications. import * as React from 'react'; import {createRoot} from 'react-dom/client'; import App from './apps/index'; function mountApp() { const container = document.createElement('div'); ((document.body: any): HTMLBodyElement).appendChild(container); const root = createRoot(container); root.render( , ); } mountApp();