Worklets 0.12.2

v0.12.2Patch ReleaseSep 8, 2026

In this article

Recreating the React instance on Android while animations were running could crash, because AnimationFrameQueue kept delivering frames after WorkletsModule had been invalidated. The queue now stops scheduling and dispatching once it is invalidated. (#10278 by @shubhamdeol)
Serializing an object with a __proto__ key crashed. The key is now defined as an own data property on the clone instead of being assigned, so it no longer triggers prototype mutation. (#10451 by @tshmieldev)
In development builds, setBlocking left a Synchronizable locked forever when the updater function or the serializer threw. The lock is now released on the way out. (#10331 by @tjzel)

Release card

More react-native-worklets releases

Worklet Runtimes get a networking module in Bundle Mode, an OXC port of the Babel plugin, and a fixed-type Synchronizable.

Adds isOnUIThread to the Worklets C++ Stable API for checking whether code runs on the UI thread.

Fixes an iOS memory leak on worklet runtime threads and pauses the Android UI loop while the app is backgrounded.

Fixes an iOS memory leak on worklet runtime threads and pauses the Android UI loop while the app is backgrounded.

Worklet Runtimes gain WeakRef support, and Bundle Mode now loads scripts the way React Native's own loaders do.

Restores babel-jest transform caching: the Worklets Babel plugin no longer mutates its shared options object.