feat: Run shadow CSS transitions on Core Animation#9685
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June 17, 2026 15:31
Add shadowColor, shadowOpacity, shadowRadius and shadowOffset to the platform-routed catalog. They ride the existing value-agnostic apply with no shadow-node eligibility: shadows are main-layer properties, independent of RN's border/background fast path. Behind IOS_CSS_CORE_ANIMATION.
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…ftware-mansion#9689) Stacked on software-mansion#9685. Adds `backgroundColor`, `borderColor`, `borderWidth` and `borderRadius` to the CSS transition properties run on Core Animation (`borderRadius` maps to CALayer's `cornerRadius`). Known limitation (TODO in code): these route unconditionally, but RN rasterizes the border and snaps the value when a view fails `useCoreAnimationBorderRendering`. A follow-up will run them on the platform only when it can produce a correct result. Verified in the simulator: on a CA-eligible (clipping) view all four interpolate smoothly.
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Stacked on #9654.
Adds
shadowColor,shadowOpacity,shadowRadiusandshadowOffsetto the CSS transition properties run on Core Animation, reusing the same value-agnostic apply as opacity.Verified in the simulator: all four interpolate smoothly on Core Animation.