48 lines
1.2 KiB
JavaScript
48 lines
1.2 KiB
JavaScript
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/**
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* Copyright 2013-present, Facebook, Inc.
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* All rights reserved.
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*
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* This source code is licensed under the BSD-style license found in the
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* LICENSE file in the root directory of this source tree. An additional grant
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* of patent rights can be found in the PATENTS file in the same directory.
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*
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* @providesModule ReactNativeFeatureFlags
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* @flow
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* @format
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*/
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'use strict';
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// =============================================================================
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// IMPORTANT:
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// When syncing React Renderer, make sure the feature flags are still compatible
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// =============================================================================
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var useFiber;
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var ReactNativeFeatureFlags = {
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get useFiber(): boolean {
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if (useFiber == null) {
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useFiber = true;
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if (__DEV__) {
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require('Systrace').installReactHook(useFiber);
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}
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}
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return useFiber;
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},
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set useFiber(enabled: boolean): void {
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if (useFiber != null) {
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throw new Error(
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'Cannot set useFiber feature flag after it has been accessed. ' +
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'Please override it before requiring React.',
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);
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}
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useFiber = enabled;
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if (__DEV__) {
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require('Systrace').installReactHook(useFiber);
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}
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},
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};
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module.exports = ReactNativeFeatureFlags;
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