After a bit of research and development, R3F is now compatible with React 19.2, including the Activity feature!

Why did this take some effort, you might wonder? When React bumped to version 19.2.x, they also bumped the internal reconciler up a version which was not backwards compatible with 19.1.x. This put us in an awkward position of either making a breaking change in the middle of R3F v9, bump to another major just because of an internal detail from React or get creative. We chose to get creative and R3F is compatible with all versions of React between 19.0 and 19.2. The downside is we had to bundle the reconciler with R3F, but react-dom already does this so for now it is the best solution available.

Forcing breaking changes on libraries is likely not what the React teams intended so we will be working with them to try to avoid this in the future.

Happy coding.

• feat: support React 19.2 by @CodyJasonBennett in https://github.com/pmndrs/react-three-fiber/pull/3606

Full Changelog: https://github.com/pmndrs/react-three-fiber/compare/v9.4.2...v9.5.0

• docs: update installation guide with iOS simulator note by @rudin in https://github.com/pmndrs/react-three-fiber/pull/3572
• fix: Expo SDK 54 compatibility through workaround by @alextoudic in https://github.com/pmndrs/react-three-fiber/pull/3599

• @rudin made their first contribution in https://github.com/pmndrs/react-three-fiber/pull/3572
• @alextoudic made their first contribution in https://github.com/pmndrs/react-three-fiber/pull/3599

Full Changelog: https://github.com/pmndrs/react-three-fiber/compare/v9.4.1...v9.4.2

• fix: pass DevTools config through createReconciler to fix React DevTools by @AlaricBaraou in https://github.com/pmndrs/react-three-fiber/pull/3594

Full Changelog: https://github.com/pmndrs/react-three-fiber/compare/v9.4.0...v9.4.1

• fix: improve resolution of dashed prop names by @tbvjaos510 in https://github.com/pmndrs/react-three-fiber/pull/3576
• feat: add explicit error to applyProps by @krispya in 7c6680f1

• @borghiste made their first contribution in https://github.com/pmndrs/react-three-fiber/pull/3569
• @tbvjaos510 made their first contribution in https://github.com/pmndrs/react-three-fiber/pull/3576
• @jacksydenham made their first contribution in https://github.com/pmndrs/react-three-fiber/pull/3586

Full Changelog: https://github.com/pmndrs/react-three-fiber/compare/v9.3.0...v9.4.0

With these release we have two big fixes.

1. flushSync now works properly. To prove it we added an example that allows you to React props and then take a screenshot of the R3F canvas with the latest state. This is a pretty advanced use case, but one people might be interested to explore for exporting videos or images using R3F.
2. React Native support has been fixed for 0.79 and newer when combined with the same update to Drei: https://github.com/pmndrs/drei/pull/2494. A big thanks to @thejustinwalsh for helping us with this one.

• chore: export flushSync by @krispya in https://github.com/pmndrs/react-three-fiber/pull/3551
• Update react-native deep imports for 0.79 compatibility by @huntie in https://github.com/pmndrs/react-three-fiber/pull/3498
• fix: update flushSync for new reconciler by @krispya in https://github.com/pmndrs/react-three-fiber/pull/3554
• feat: add flushSync example by @krispya in https://github.com/pmndrs/react-three-fiber/pull/3560

• @s-pace made their first contribution in https://github.com/pmndrs/react-three-fiber/pull/3521
• @huntie made their first contribution in https://github.com/pmndrs/react-three-fiber/pull/3498

Full Changelog: https://github.com/pmndrs/react-three-fiber/compare/v9.1.4...v9.3.0

• fix(types): Accept readonly arrays for vector props by @RodrigoHamuy in https://github.com/pmndrs/react-three-fiber/pull/3527

• @RodrigoHamuy made their first contribution in https://github.com/pmndrs/react-three-fiber/pull/3527

Full Changelog: https://github.com/pmndrs/react-three-fiber/compare/v9.1.3...v9.1.4

• fix(native) fix crash on rerendering GLView with new arch by @NikitaDudin in https://github.com/pmndrs/react-three-fiber/pull/3539

• @s-rigaud made their first contribution in https://github.com/pmndrs/react-three-fiber/pull/3518
• @NikitaDudin made their first contribution in https://github.com/pmndrs/react-three-fiber/pull/3539

Full Changelog: https://github.com/pmndrs/react-three-fiber/compare/v9.1.2...v9.1.3

• fix: reference dev-only act with computed key for Webpack by @CodyJasonBennett in https://github.com/pmndrs/react-three-fiber/pull/3513

Full Changelog: https://github.com/pmndrs/react-three-fiber/compare/v9.1.1...v9.1.2

Most importantly, this fixes rsbuild with vReact 19.1.0 and later.

• chore: add rsbuild to CI test by @krispya in https://github.com/pmndrs/react-three-fiber/pull/3510
• Fix builds failing from React.act being removed from the production bundle by @itsdouges in https://github.com/pmndrs/react-three-fiber/pull/3508

Full Changelog: https://github.com/pmndrs/react-three-fiber/compare/v9.1.0...v9.1.1

• feat: add meshes to loader graph by @krispya in https://github.com/pmndrs/react-three-fiber/pull/3479
• fix(reconciler): out of order children move to the correct position during rerenders by @krispya in https://github.com/pmndrs/react-three-fiber/pull/3488
• fix(applyProps): set check when resolving pierced properties by @krispya in https://github.com/pmndrs/react-three-fiber/pull/3485

• @kayden1940 made their first contribution in https://github.com/pmndrs/react-three-fiber/pull/3475
• @jo-chemla made their first contribution in https://github.com/pmndrs/react-three-fiber/pull/3378

Full Changelog: https://github.com/pmndrs/react-three-fiber/compare/v9.0.4...v9.1.0