56 lines
1.5 KiB
JavaScript
56 lines
1.5 KiB
JavaScript
/**
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* Copyright (c) Facebook, Inc. and its affiliates.
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*
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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*
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* @format
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* @flow
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*/
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/* globals window: true */
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/**
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* Sets up global variables typical in most JavaScript environments.
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*
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* 1. Global timers (via `setTimeout` etc).
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* 2. Global console object.
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* 3. Hooks for printing stack traces with source maps.
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*
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* Leaves enough room in the environment for implementing your own:
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*
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* 1. Require system.
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* 2. Bridged modules.
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*
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*/
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'use strict';
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const start = Date.now();
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require('setUpGlobals');
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require('polyfillES6Collections');
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require('setUpSystrace');
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require('setUpErrorHandling');
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require('checkNativeVersion');
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require('polyfillPromise');
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require('setUpRegeneratorRuntime');
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require('setUpTimers');
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require('setUpXHR');
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require('setUpAlert');
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require('setUpGeolocation');
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require('setUpBatchedBridge');
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require('setUpSegmentFetcher');
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if (__DEV__) {
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require('setUpDeveloperTools');
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}
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const PerformanceLogger = require('PerformanceLogger');
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// We could just call PerformanceLogger.markPoint at the top of the file,
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// but then we'd be excluding the time it took to require PerformanceLogger.
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// Instead, we just use Date.now and backdate the timestamp.
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PerformanceLogger.markPoint(
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'initializeCore_start',
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PerformanceLogger.currentTimestamp() - (Date.now() - start),
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);
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PerformanceLogger.markPoint('initializeCore_end');
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