Observed Signal · May 28, 2026 · Technical Release · Source: DEV Community · Impact: 2/5 · Sentiment: Positive
Expo UI SDK 56 Adds UI-Thread Worklets
Expo UI (SDK 56) introduces worklet integration that lets React Native code control SwiftUI and Jetpack Compose state synchronously on the native UI thread. The new useNativeState hook creates a native ObservableState (a shared native object mapped to ObservableObject on iOS and MutableState on Android) which both SwiftUI and Compose observe. Worklet callbacks (for example onChangeText) run directly on the UI thread with zero JavaScript bridge round-trips, enabling instant behaviors such as input masking. The feature requires react-native-reanimated and react-native-worklets and is available in @expo/ui/swift-ui and @expo/ui/jetpack-compose, with TextInput supporting synchronous callbacks in this release.
SDK-level feature enabling synchronous native UI updates reduces input latency and unlocks native SwiftUI/Compose patterns for React Native apps; relevant to mobile app development but not industry-shifting for AdTech/MarTech.
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Key Takeaways & Evidence Grounding
- Expo UI worklet integration shipped in SDK 56.
- useNativeState creates a native ObservableState (SharedObject) observed by SwiftUI on iOS and MutableState on Android.
- Worklet callbacks run directly on the native UI thread, avoiding JavaScript bridge round-trips.
- Feature requires react-native-reanimated and react-native-worklets to be installed.
- Worklet support available in @expo/ui/swift-ui and @expo/ui/jetpack-compose; TextInput now supports synchronous callbacks.
Connected Companies & Entities
2 Entities mappedOntology Mapping & Concepts
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