• 620f78c7 #3812 Thanks @barroij! - Prevent reaction from heeping a Reference to the OldValue that would prevent GC.

• 6111b093 #3833 Thanks @realyze! - Reduce memory overhead of tracking dependencies

Minor Changes

• ec5db592 #3792 Thanks @tonyraoul! - Improve observablearray proxy pefromance for es2023.array and es2022.array methods

Patch Changes

• 86616c11 #3654 Thanks @ahoisl! - fix: action transparently forwards toString of underlying function

Minor Changes

• c9260974 #3790 Thanks @mweststrate! - Added support for modern 2022.3 Decorators. #3790
  • Installation / usage instruction.
  • Introduction announcement
  • Original PR by @Matchlighter in #3638,

Patch Changes

• 5063c38e #3776 Thanks @wbercx! - Fixed premature disposal of class component observers.

Patch Changes

• 87e5dfb5 #3763 Thanks @mweststrate! - Switched observer implementation from using global to local state version. Fixes #3728

Patch Changes

• c8d9374d #3748 Thanks @mweststrate! - Fixed: #3747, computed values becoming stale if the underlying observable was created and updated outside a reactive context

Minor Changes

• bebd5f05 #3727 Thanks @rluvaton! - Added support for signal (AbortSignal) in autorun, reaction and sync when options to dispose them

Patch Changes

• 55f78ddc #3717 Thanks @liucan233! - remove proxy option for makeObservable and makeAutoObservable

Patch Changes

• 4792303e #3709 Thanks @kubk! - Make trace() noop in production build

Major Changes

• 473cb3f5 #3718 Thanks @mweststrate! - - Fixed observer in StrictMode #3671
  • [BREAKING CHANGE] Class component's props/state/context are no longer observable. Attempt to use these in any derivation other than component's render throws and error. For details see https://github.com/mobxjs/mobx/blob/main/packages/mobx-react/README.md#note-on-using-props-and-state-in-derivations
  • Extending or applying observer classes is now explicitly forbidden

Patch Changes

• Updated dependencies [58bb052c, 473cb3f5]:
  • mobx-react-lite@4.0.3

Patch Changes

• 58bb052c #3670 Thanks @urugator! - fix #3669: SSR: useSyncExternalStore throws due to missing getServerSnapshot

• 473cb3f5 #3718 Thanks @mweststrate! - - Fixed observer in StrictMode #3671

  • [BREAKING CHANGE] Class component's props/state/context are no longer observable. Attempt to use these in any derivation other than component's render throws and error. For details see https://github.com/mobxjs/mobx/blob/main/packages/mobx-react/README.md#note-on-using-props-and-state-in-derivations
  • Extending or applying observer classes is now explicitly forbidden