mirror of
https://github.com/facebook/react.git
synced 2025-11-01 09:12:30 +00:00
Andrew ClarkandGitHub
48b4ecc901
This removes defaultProps support for all component types except for
classes. We've chosen to continue supporting defaultProps for classes
because lots of older code relies on it, and unlike function components,
(which can use default params), there's no straightforward alternative.
By implication, it also removes support for setting defaultProps on
`React.lazy` wrapper. So this will not work:
```js
const MyClassComponent = React.lazy(() => import('./MyClassComponent'));
// MyClassComponent is not actually a class; it's a lazy wrapper. So
// defaultProps does not work.
MyClassComponent.defaultProps = { foo: 'bar' };
```
However, if you set the default props on the class itself, then it's
fine.
For classes, this change also moves where defaultProps are resolved.
Previously, defaultProps were resolved by the JSX runtime. This change
is only observable if you introspect a JSX element, which is relatively
rare but does happen.
In other words, previously `<ClassWithDefaultProp />.props.aDefaultProp`
would resolve to the default prop value, but now it does not.
112 lines
5.2 KiB
JavaScript
112 lines
5.2 KiB
JavaScript
/**
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* Copyright (c) Meta Platforms, Inc. and 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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* @flow
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*/
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import typeof * as FeatureFlagsType from 'shared/ReactFeatureFlags';
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import typeof * as ExportsType from './ReactFeatureFlags.native-oss';
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// TODO: Align these flags with canary and delete this file once RN ships from Canary.
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// -----------------------------------------------------------------------------
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// TODO for next React Native major.
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//
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// Alias __TODO_NEXT_RN_MAJOR__ to false for easier skimming.
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// -----------------------------------------------------------------------------
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const __TODO_NEXT_RN_MAJOR__ = false;
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export const enableRefAsProp = __TODO_NEXT_RN_MAJOR__;
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export const disableStringRefs = __TODO_NEXT_RN_MAJOR__;
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export const disableLegacyMode = __TODO_NEXT_RN_MAJOR__;
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export const disableDOMTestUtils = __TODO_NEXT_RN_MAJOR__;
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export const useModernStrictMode = __TODO_NEXT_RN_MAJOR__;
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export const enableReactTestRendererWarning = __TODO_NEXT_RN_MAJOR__;
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export const enableAsyncActions = __TODO_NEXT_RN_MAJOR__;
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export const consoleManagedByDevToolsDuringStrictMode = __TODO_NEXT_RN_MAJOR__;
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export const enableDeferRootSchedulingToMicrotask = __TODO_NEXT_RN_MAJOR__;
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export const alwaysThrottleRetries = __TODO_NEXT_RN_MAJOR__;
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export const enableInfiniteRenderLoopDetection = __TODO_NEXT_RN_MAJOR__;
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export const enableComponentStackLocations = __TODO_NEXT_RN_MAJOR__;
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// -----------------------------------------------------------------------------
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// These are ready to flip after the next React npm release (or RN switches to
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// Canary, but can't flip before then because of react/renderer mismatches.
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// -----------------------------------------------------------------------------
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export const enableCache = __TODO_NEXT_RN_MAJOR__;
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export const enableRenderableContext = __TODO_NEXT_RN_MAJOR__;
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export const disableDefaultPropsExceptForClasses = __TODO_NEXT_RN_MAJOR__;
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// -----------------------------------------------------------------------------
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// Already enabled for next React Native major.
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// Hardcode these to true after the next RN major.
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//
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// Alias __NEXT_RN_MAJOR__ to true for easier skimming.
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// -----------------------------------------------------------------------------
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const __NEXT_RN_MAJOR__ = true;
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export const disableClientCache = __NEXT_RN_MAJOR__;
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export const disableLegacyContext = __NEXT_RN_MAJOR__;
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export const enableTaint = __NEXT_RN_MAJOR__;
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export const enableUnifiedSyncLane = __NEXT_RN_MAJOR__;
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export const enableFizzExternalRuntime = __NEXT_RN_MAJOR__; // DOM-only
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export const enableBinaryFlight = __NEXT_RN_MAJOR__; // DOM-only
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export const enableServerComponentKeys = __NEXT_RN_MAJOR__;
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export const enableServerComponentLogs = __NEXT_RN_MAJOR__;
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// DEV-only but enabled in the next RN Major.
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// Not supported by flag script to avoid the special case.
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export const debugRenderPhaseSideEffectsForStrictMode = __DEV__;
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// TODO: decide on React 19
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export const enableUseMemoCacheHook = false;
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export const enableUseDeferredValueInitialArg = __EXPERIMENTAL__;
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// -----------------------------------------------------------------------------
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// All other flags
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// -----------------------------------------------------------------------------
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export const enableCPUSuspense = false;
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export const enableDebugTracing = false;
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export const enableAsyncDebugInfo = false;
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export const enableSchedulingProfiler = __PROFILE__;
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export const enableLegacyCache = false;
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export const enableFetchInstrumentation = false;
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export const enablePostpone = false;
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export const disableCommentsAsDOMContainers = true;
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export const disableInputAttributeSyncing = false;
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export const disableIEWorkarounds = true;
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export const enableScopeAPI = false;
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export const enableCreateEventHandleAPI = false;
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export const enableSuspenseCallback = false;
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export const enableTrustedTypesIntegration = false;
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export const disableTextareaChildren = false;
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export const enableSuspenseAvoidThisFallback = false;
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export const enableSuspenseAvoidThisFallbackFizz = false;
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export const enableUseEffectEventHook = false;
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export const favorSafetyOverHydrationPerf = true;
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export const enableLegacyFBSupport = false;
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export const enableFilterEmptyStringAttributesDOM = true;
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export const enableGetInspectorDataForInstanceInProduction = false;
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export const enableRetryLaneExpiration = false;
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export const retryLaneExpirationMs = 5000;
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export const syncLaneExpirationMs = 250;
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export const transitionLaneExpirationMs = 5000;
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export const disableSchedulerTimeoutInWorkLoop = false;
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export const enableLazyContextPropagation = false;
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export const enableLegacyHidden = false;
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export const forceConcurrentByDefaultForTesting = false;
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export const allowConcurrentByDefault = false;
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export const enableTransitionTracing = false;
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export const enableDO_NOT_USE_disableStrictPassiveEffect = false;
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export const passChildrenWhenCloningPersistedNodes = false;
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// Profiling Only
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export const enableProfilerTimer = __PROFILE__;
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export const enableProfilerCommitHooks = __PROFILE__;
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export const enableProfilerNestedUpdatePhase = __PROFILE__;
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export const enableUpdaterTracking = __PROFILE__;
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// Flow magic to verify the exports of this file match the original version.
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((((null: any): ExportsType): FeatureFlagsType): ExportsType);
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