/** * Copyright (c) Meta Platforms, Inc. and affiliates. * * This source code is licensed under the MIT license found in the * LICENSE file in the root directory of this source tree. * * @format * @flow strict-local */ /** * Sets up global variables typical in most JavaScript environments. * * 1. Global timers (via `setTimeout` etc). * 2. Global console object. * 3. Hooks for printing stack traces with source maps. * * Leaves enough room in the environment for implementing your own: * * 1. Require system. * 2. Bridged modules. * */ 'use strict'; const start = Date.now(); require('./setUpGlobals'); require('./setUpPerformance'); require('./setUpSystrace'); require('./setUpErrorHandling'); require('./polyfillPromise'); require('./setUpRegeneratorRuntime'); require('./setUpTimers'); require('./setUpXHR'); require('./setUpAlert'); require('./setUpNavigator'); require('./setUpBatchedBridge'); require('./setUpSegmentFetcher'); if (__DEV__) { require('./checkNativeVersion'); require('./setUpDeveloperTools'); require('../LogBox/LogBox').install(); } const GlobalPerformanceLogger = require('../Utilities/GlobalPerformanceLogger'); // We could just call GlobalPerformanceLogger.markPoint at the top of the file, // but then we'd be excluding the time it took to require the logger. // Instead, we just use Date.now and backdate the timestamp. GlobalPerformanceLogger.markPoint( 'initializeCore_start', GlobalPerformanceLogger.currentTimestamp() - (Date.now() - start), ); GlobalPerformanceLogger.markPoint('initializeCore_end');