/* * 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. * * @generated SignedSource<> */ /** * IMPORTANT: Do NOT modify this file directly. * * To change the definition of the flags, edit * packages/react-native/scripts/featureflags/ReactNativeFeatureFlags.config.js. * * To regenerate this code, run the following script from the repo root: * yarn featureflags --update */ package com.facebook.react.internal.featureflags /** * This object provides access to internal React Native feature flags. * * All the methods are thread-safe if you handle `override` correctly. */ public object ReactNativeFeatureFlags { private var accessorProvider: () -> ReactNativeFeatureFlagsAccessor = { ReactNativeFeatureFlagsCxxAccessor() } private var accessor: ReactNativeFeatureFlagsAccessor = accessorProvider() /** * Common flag for testing. Do NOT modify. */ @JvmStatic public fun commonTestFlag(): Boolean = accessor.commonTestFlag() /** * Do not wait for a main-thread dispatch to complete init to start executing work on the JS thread on Android */ @JvmStatic public fun completeReactInstanceCreationOnBgThreadOnAndroid(): Boolean = accessor.completeReactInstanceCreationOnBgThreadOnAndroid() /** * The bridgeless architecture enables the event loop by default. This feature flag allows us to force disabling it in specific instances. */ @JvmStatic public fun disableEventLoopOnBridgeless(): Boolean = accessor.disableEventLoopOnBridgeless() /** * Prevent FabricMountingManager from reordering mountitems, which may lead to invalid state on the UI thread */ @JvmStatic public fun disableMountItemReorderingAndroid(): Boolean = accessor.disableMountItemReorderingAndroid() /** * Kill-switch to turn off support for aling-items:baseline on Fabric iOS. */ @JvmStatic public fun enableAlignItemsBaselineOnFabricIOS(): Boolean = accessor.enableAlignItemsBaselineOnFabricIOS() /** * When enabled, custom line height calculation will be centered from top to bottom. */ @JvmStatic public fun enableAndroidLineHeightCentering(): Boolean = accessor.enableAndroidLineHeightCentering() /** * Feature flag to enable the new bridgeless architecture. Note: Enabling this will force enable the following flags: `useTurboModules` & `enableFabricRenderer. */ @JvmStatic public fun enableBridgelessArchitecture(): Boolean = accessor.enableBridgelessArchitecture() /** * Enable prop iterator setter-style construction of Props in C++ (this flag is not used in Java). */ @JvmStatic public fun enableCppPropsIteratorSetter(): Boolean = accessor.enableCppPropsIteratorSetter() /** * Deletes views that were pre-allocated but never mounted on the screen. */ @JvmStatic public fun enableDeletionOfUnmountedViews(): Boolean = accessor.enableDeletionOfUnmountedViews() /** * Feature flag to configure eager attachment of the root view/initialisation of the JS code. */ @JvmStatic public fun enableEagerRootViewAttachment(): Boolean = accessor.enableEagerRootViewAttachment() /** * Enables the retention of EventEmitterWrapper on Android till the touch gesture is over to fix a bug on pressable (#44610) */ @JvmStatic public fun enableEventEmitterRetentionDuringGesturesOnAndroid(): Boolean = accessor.enableEventEmitterRetentionDuringGesturesOnAndroid() /** * This feature flag enables logs for Fabric. */ @JvmStatic public fun enableFabricLogs(): Boolean = accessor.enableFabricLogs() /** * Enables the use of the Fabric renderer in the whole app. */ @JvmStatic public fun enableFabricRenderer(): Boolean = accessor.enableFabricRenderer() /** * When the app is completely migrated to Fabric, set this flag to true to disable parts of Paper infrastructure that are not needed anymore but consume memory and CPU. Specifically, UIViewOperationQueue and EventDispatcherImpl will no longer work as they will not subscribe to ReactChoreographer for updates. */ @JvmStatic public fun enableFabricRendererExclusively(): Boolean = accessor.enableFabricRendererExclusively() /** * Synchronise the view command dispatching with mounting of new transaction */ @JvmStatic public fun enableFixForViewCommandRace(): Boolean = accessor.enableFixForViewCommandRace() /** * When enabled, the renderer would only fail commits when they propagate state and the last commit that updated state changed before committing. */ @JvmStatic public fun enableGranularShadowTreeStateReconciliation(): Boolean = accessor.enableGranularShadowTreeStateReconciliation() /** * iOS Views will clip to their padding box vs border box */ @JvmStatic public fun enableIOSViewClipToPaddingBox(): Boolean = accessor.enableIOSViewClipToPaddingBox() /** * When enabled, LayoutAnimations API will animate state changes on Android. */ @JvmStatic public fun enableLayoutAnimationsOnAndroid(): Boolean = accessor.enableLayoutAnimationsOnAndroid() /** * When enabled, LayoutAnimations API will animate state changes on iOS. */ @JvmStatic public fun enableLayoutAnimationsOnIOS(): Boolean = accessor.enableLayoutAnimationsOnIOS() /** * Enables the reporting of long tasks through `PerformanceObserver`. Only works if the event loop is enabled. */ @JvmStatic public fun enableLongTaskAPI(): Boolean = accessor.enableLongTaskAPI() /** * Use BackgroundDrawable and BorderDrawable instead of CSSBackgroundDrawable */ @JvmStatic public fun enableNewBackgroundAndBorderDrawables(): Boolean = accessor.enableNewBackgroundAndBorderDrawables() /** * Moves execution of pre-mount items to outside the choregrapher in the main thread, so we can estimate idle time more precisely (Android only). */ @JvmStatic public fun enablePreciseSchedulingForPremountItemsOnAndroid(): Boolean = accessor.enablePreciseSchedulingForPremountItemsOnAndroid() /** * When enabled, Android will receive prop updates based on the differences between the last rendered shadow node and the last committed shadow node. */ @JvmStatic public fun enablePropsUpdateReconciliationAndroid(): Boolean = accessor.enablePropsUpdateReconciliationAndroid() /** * Report paint time inside the Event Timing API implementation (PerformanceObserver). */ @JvmStatic public fun enableReportEventPaintTime(): Boolean = accessor.enableReportEventPaintTime() /** * Dispatches state updates synchronously in Fabric (e.g.: updates the scroll position in the shadow tree synchronously from the main thread). */ @JvmStatic public fun enableSynchronousStateUpdates(): Boolean = accessor.enableSynchronousStateUpdates() /** * Ensures that JavaScript always has a consistent view of the state of the UI (e.g.: commits done in other threads are not immediately propagated to JS during its execution). */ @JvmStatic public fun enableUIConsistency(): Boolean = accessor.enableUIConsistency() /** * Enables View Recycling. When enabled, individual ViewManagers must still opt-in. */ @JvmStatic public fun enableViewRecycling(): Boolean = accessor.enableViewRecycling() /** * When enabled, rawProps in Props will not include Yoga specific props. */ @JvmStatic public fun excludeYogaFromRawProps(): Boolean = accessor.excludeYogaFromRawProps() /** * Uses the default event priority instead of the discreet event priority by default when dispatching events from Fabric to React. */ @JvmStatic public fun fixMappingOfEventPrioritiesBetweenFabricAndReact(): Boolean = accessor.fixMappingOfEventPrioritiesBetweenFabricAndReact() /** * Fixes a limitation on Android where the mounting coordinator would report there are no pending transactions but some of them were actually not processed due to the use of the push model. */ @JvmStatic public fun fixMountingCoordinatorReportedPendingTransactionsOnAndroid(): Boolean = accessor.fixMountingCoordinatorReportedPendingTransactionsOnAndroid() /** * Flag determining if the React Native DevTools (Fusebox) CDP backend should be enabled in debug builds. This flag is global and should not be changed across React Host lifetimes. */ @JvmStatic public fun fuseboxEnabledDebug(): Boolean = accessor.fuseboxEnabledDebug() /** * Flag determining if the React Native DevTools (Fusebox) CDP backend should be enabled in release builds. This flag is global and should not be changed across React Host lifetimes. */ @JvmStatic public fun fuseboxEnabledRelease(): Boolean = accessor.fuseboxEnabledRelease() /** * Construct modules that requires eager init on the dedicate native modules thread */ @JvmStatic public fun initEagerTurboModulesOnNativeModulesQueueAndroid(): Boolean = accessor.initEagerTurboModulesOnNativeModulesQueueAndroid() /** * Only enqueue Choreographer calls if there is an ongoing animation, instead of enqueueing every frame. */ @JvmStatic public fun lazyAnimationCallbacks(): Boolean = accessor.lazyAnimationCallbacks() /** * Adds support for loading vector drawable assets in the Image component (only on Android) */ @JvmStatic public fun loadVectorDrawablesOnImages(): Boolean = accessor.loadVectorDrawablesOnImages() /** * Enables storing js caller stack when creating promise in native module. This is useful in case of Promise rejection and tracing the cause. */ @JvmStatic public fun traceTurboModulePromiseRejectionsOnAndroid(): Boolean = accessor.traceTurboModulePromiseRejectionsOnAndroid() /** * In Bridgeless mode, use the always available javascript error reporting pipeline. */ @JvmStatic public fun useAlwaysAvailableJSErrorHandling(): Boolean = accessor.useAlwaysAvailableJSErrorHandling() /** * Should this application enable the Fabric Interop Layer for Android? If yes, the application will behave so that it can accept non-Fabric components and render them on Fabric. This toggle is controlling extra logic such as custom event dispatching that are needed for the Fabric Interop Layer to work correctly. */ @JvmStatic public fun useFabricInterop(): Boolean = accessor.useFabricInterop() /** * Invoke callbacks immediately on the ReactInstance rather than going through a background thread for synchronization */ @JvmStatic public fun useImmediateExecutorInAndroidBridgeless(): Boolean = accessor.useImmediateExecutorInAndroidBridgeless() /** * When enabled, the native view configs are used in bridgeless mode. */ @JvmStatic public fun useNativeViewConfigsInBridgelessMode(): Boolean = accessor.useNativeViewConfigsInBridgelessMode() /** * Moves more of the work in view preallocation to the main thread to free up JS thread. */ @JvmStatic public fun useOptimisedViewPreallocationOnAndroid(): Boolean = accessor.useOptimisedViewPreallocationOnAndroid() /** * Uses an optimized mechanism for event batching on Android that does not need to wait for a Choreographer frame callback. */ @JvmStatic public fun useOptimizedEventBatchingOnAndroid(): Boolean = accessor.useOptimizedEventBatchingOnAndroid() /** * When enabled, cloning shadow nodes within react native will update the reference held by the current JS fiber tree. */ @JvmStatic public fun useRuntimeShadowNodeReferenceUpdate(): Boolean = accessor.useRuntimeShadowNodeReferenceUpdate() /** * In Bridgeless mode, should legacy NativeModules use the TurboModule system? */ @JvmStatic public fun useTurboModuleInterop(): Boolean = accessor.useTurboModuleInterop() /** * When enabled, NativeModules will be executed by using the TurboModule system */ @JvmStatic public fun useTurboModules(): Boolean = accessor.useTurboModules() /** * Overrides the feature flags with the ones provided by the given provider * (generally one that extends `ReactNativeFeatureFlagsDefaults`). * * This method must be called before you initialize the React Native runtime. * * @example * * ``` * ReactNativeFeatureFlags.override(object : ReactNativeFeatureFlagsDefaults() { * override fun someFlag(): Boolean = true // or a dynamic value * }) * ``` */ @JvmStatic public fun override(provider: ReactNativeFeatureFlagsProvider): Unit = accessor.override(provider) /** * Removes the overridden feature flags and makes the API return default * values again. * * This should only be called if you destroy the React Native runtime and * need to create a new one with different overrides. In that case, * call `dangerouslyReset` after destroying the runtime and `override` * again before initializing the new one. */ @JvmStatic public fun dangerouslyReset() { // This is necessary when the accessor interops with C++ and we need to // remove the overrides set there. accessor.dangerouslyReset() // This discards the cached values and the overrides set in the JVM. accessor = accessorProvider() } /** * This is a combination of `dangerouslyReset` and `override` that reduces * the likeliness of a race condition between the two calls. * * This is **dangerous** because it can introduce consistency issues that will * be much harder to debug. For example, it could hide the fact that feature * flags are read before you set the values you want to use everywhere. It * could also cause a workflow to suddently have different feature flags for * behaviors that were configured with different values before. * * It returns a string that contains the feature flags that were accessed * before this call (or between the last call to `dangerouslyReset` and this * call). If you are using this method, you do not want the hard crash that * you would get from using `dangerouslyReset` and `override` separately, * but you should still log this somehow. * * Please see the documentation of `dangerouslyReset` for additional details. */ @JvmStatic public fun dangerouslyForceOverride(provider: ReactNativeFeatureFlagsProvider): String? { val newAccessor = accessorProvider() val previouslyAccessedFlags = newAccessor.dangerouslyForceOverride(provider) accessor = newAccessor return previouslyAccessedFlags } /** * This is just used to replace the default ReactNativeFeatureFlagsCxxAccessor * that uses JNI with a version that doesn't, to simplify testing. */ internal fun setAccessorProvider(newAccessorProvider: () -> ReactNativeFeatureFlagsAccessor) { accessorProvider = newAccessorProvider accessor = accessorProvider() } }