Source: index.js

/**
 * @file
 *
 * Summary.
 * <p>Import App.js and register it.</p>
 */

import { registerRootComponent } from "expo";

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);