import { registerRootComponent } from 'expo'; // Polyfill for Promise.allSettled (ES2020 feature) if (!Promise.allSettled) { Promise.allSettled = function(promises: Promise[]): Promise[]> { return Promise.all( promises.map(promise => Promise.resolve(promise) .then(value => ({ status: 'fulfilled' as const, value })) .catch(reason => ({ status: 'rejected' as const, reason })) ) ); }; } import App from './App'; // registerRootComponent calls AppRegistry.registerComponent('main', () => App); // It also ensures that whether you load the app in Expo Go or in a native build, // the environment is set up appropriately registerRootComponent(App);