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7e87df8090
We'll use this in www to test whether the polyfill is better at scheduling high-pri async work than the native one. My preliminary tests suggest "yes" but it's hard to say for certain, given how difficult it is to consistently reproduce the starvation issues we've been seeing.
42 lines
1.4 KiB
JavaScript
42 lines
1.4 KiB
JavaScript
/**
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* Copyright (c) 2013-present, Facebook, Inc.
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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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* @flow
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*/
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import invariant from 'fbjs/lib/invariant';
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import typeof * as FeatureFlagsType from 'shared/ReactFeatureFlags';
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import typeof * as FeatureFlagsShimType from './ReactFeatureFlags.native';
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// Re-export dynamic flags from the fbsource version.
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export const {
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enableGetDerivedStateFromCatch,
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debugRenderPhaseSideEffects,
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debugRenderPhaseSideEffectsForStrictMode,
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warnAboutDeprecatedLifecycles,
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replayFailedUnitOfWorkWithInvokeGuardedCallback,
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} = require('ReactFeatureFlags');
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// The rest of the flags are static for better dead code elimination.
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export const enableCreateRoot = false;
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export const enableUserTimingAPI = __DEV__;
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export const enableMutatingReconciler = true;
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export const enableNoopReconciler = false;
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export const enablePersistentReconciler = false;
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export const alwaysUseRequestIdleCallbackPolyfill = false;
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// Only used in www builds.
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export function addUserTimingListener() {
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invariant(false, 'Not implemented.');
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}
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// Flow magic to verify the exports of this file match the original version.
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// eslint-disable-next-line no-unused-vars
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type Check<_X, Y: _X, X: Y = _X> = null;
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// eslint-disable-next-line no-unused-expressions
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(null: Check<FeatureFlagsShimType, FeatureFlagsType>);
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