Defer timing animation start through JS Animated (#57003)#57003
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Summary: Wire `animatedDeferStartOfTimingAnimations` through the JS Animated layer: `AnimatedValue` arms a one-shot `__deferAnimationStart`, and `TimingAnimation` forwards `deferredStart` in the native animation config so the native `FrameAnimationDriver` defers its start to the first rendered frame. Gated behind the runtime flag (default off). Adds Fantom integration tests asserting the behavior with the flag on and off. ## Changelog: [Internal] [Changed] - Defer timing animation start through JS Animated Differential Revision: D106825746
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Summary: Wire `animatedDeferStartOfTimingAnimations` through the JS Animated layer: `AnimatedValue` arms a one-shot `__deferAnimationStart`, and `TimingAnimation` forwards `deferredStart` in the native animation config so the native `FrameAnimationDriver` defers its start to the first rendered frame. Gated behind the runtime flag (default off). Adds Fantom integration tests asserting the behavior with the flag on and off. ## Changelog: [Internal] [Changed] - Defer timing animation start through JS Animated Differential Revision: D106825746
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Summary: Wire `animatedDeferStartOfTimingAnimations` through the JS Animated layer: `AnimatedValue` arms a one-shot `__deferAnimationStart`, and `TimingAnimation` forwards `deferredStart` in the native animation config so the native `FrameAnimationDriver` defers its start to the first rendered frame. Gated behind the runtime flag (default off). Adds Fantom integration tests asserting the behavior with the flag on and off. ## Changelog: [Internal] [Changed] - Defer timing animation start through JS Animated Differential Revision: D106825746
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Summary: Add the `animatedDeferStartOfTimingAnimations` common (native + JS) feature flag (default off). On its own this is a no-op; it gates deferring the start of native-driven timing animations to the first rendered frame, implemented in the following diffs. The flag is defined as a `common` flag (not JS-only) so the same value can be read from both the JS Animated layer and the native C++ animation code. This diff includes all the generated accessors, regenerated via `yarn featureflags --update`: Kotlin (`ReactNativeFeatureFlags*.kt`), C++ (`ReactNativeFeatureFlags*.h`/`.cpp` and the JNI interop), the JS `ReactNativeFeatureFlags.js`, and the native module spec. Changelog: [Internal] Reviewed By: rubennorte Differential Revision: D106825629
Summary: Wire `animatedDeferStartOfTimingAnimations` through the JS Animated layer: `AnimatedValue` arms a one-shot `__deferAnimationStart`, and `TimingAnimation` forwards `deferredStart` in the native animation config so the native `FrameAnimationDriver` defers its start to the first rendered frame. Gated behind the runtime flag (default off). Adds Fantom integration tests asserting the behavior with the flag on and off. Changelog: [Internal] Reviewed By: christophpurrer Differential Revision: D106825746
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Summary:
Wire
animatedDeferStartOfTimingAnimationsthrough the JS Animated layer:AnimatedValuearms a one-shot__deferAnimationStart, andTimingAnimationforwardsdeferredStartin the native animation config so the nativeFrameAnimationDriverdefers its start to the first rendered frame. Gated behind the runtime flag (default off). Adds Fantom integration tests asserting the behavior with the flag on and off.Changelog: [Internal]
Reviewed By: christophpurrer
Differential Revision: D106825746