npm / valtio
valtio
What changed in valtio 2, from its official release notes, upgrade guides and advisories. Sources checked 2026-10-18.
1 breaking2 deprecations2 fixes and other
See which of these apply to your code, ranked, in your agent:
npx @unstale/cli initvaltio 25 changes
Breaking changes 1
The ops callback is disabled by default; call unstable_enableOp(true) from valtio/vanilla to keep the previous behavior.
Deprecations 2
derive is deprecated.
watch is deprecated.
Fixes and other changes 2
Removed from createSnapshotDefault for Hermes compatibility in React Native.
Reverted the change made in v2.2.0 that seemed to cause a problem in an edge case.