mobx

# mobx ## 6.13.7 ### Patch Changes - [`54e3f71ca02f09b3107290f18d8484b70a6e2f0b`](https://github.com/mobxjs/mobx/commit/54e3f71ca02f09b3107290f18d8484b70a6e2f0b) [#4528](https://github.com/mobxjs/mobx/pull/4528) Thanks [@k-g-a](https://github.com/k-g-a)! - Fix observable.set not respecting the new value from interceptors ## 6.13.6 ### Patch Changes - [`bca3841347f4fba50ad910e1c4176c56ba0173d1`](https://github.com/mobxjs/mobx/commit/bca3841347f4fba50ad910e1c4176c56ba0173d1) [#3993](https://github.com/mobxjs/mobx/pull/3993) Thanks [@tonyraoul](https://github.com/tonyraoul)! - Improve observableset memory footprint and performance ## 6.13.5 ### Patch Changes - [`4c077738776d5fc7ba0f108805a9ec816c2709b9`](https://github.com/mobxjs/mobx/commit/4c077738776d5fc7ba0f108805a9ec816c2709b9) [#3943](https://github.com/mobxjs/mobx/pull/3943) Thanks [@tonyraoul](https://github.com/tonyraoul)! - Fix browser compatability issue introduced in 6.13.4 release ## 6.13.4 ### Patch Changes - [`f91d2e1dc85a53b729c03bd28ab39ffcf0838403`](https://github.com/mobxjs/mobx/commit/f91d2e1dc85a53b729c03bd28ab39ffcf0838403) [#3935](https://github.com/mobxjs/mobx/pull/3935) Thanks [@tonyraoul](https://github.com/tonyraoul)! - Update typescript version to 5.6.2 and added support for esnext iterator helpers ## 6.13.3 ### Patch Changes - [`a1cf2c63ef92d3d42a5b42a23ff6c7a745664cfd`](https://github.com/mobxjs/mobx/commit/a1cf2c63ef92d3d42a5b42a23ff6c7a745664cfd) [#3902](https://github.com/mobxjs/mobx/pull/3902) Thanks [@jzhan-canva](https://github.com/jzhan-canva)! - Fix 2022.3 @action decorators on fields no longer require makeObservable ## 6.13.2 ### Patch Changes - [`f1f922152b45357a49ee6b310e9e0ecf38bd3955`](https://github.com/mobxjs/mobx/commit/f1f922152b45357a49ee6b310e9e0ecf38bd3955) [#3921](https://github.com/mobxjs/mobx/pull/3921) Thanks [@urugator](https://github.com/urugator)! - fix: #3919 new set methods not working with observable set ## 6.13.1 ### Patch Changes - [`5e711e0b4737fd6b5b3c6f9b32afd4f195bc5fc3`](https://github.com/mobxjs/mobx/commit/5e711e0b4737fd6b5b3c6f9b32afd4f195bc5fc3) [#3901](https://github.com/mobxjs/mobx/pull/3901) Thanks [@peterm-canva](https://github.com/peterm-canva)! - Shrink Atom and Reaction using a bitfield ## 6.13.0 ### Minor Changes - [`16f070e6aac60e9010c2591b1743276d700b23d5`](https://github.com/mobxjs/mobx/commit/16f070e6aac60e9010c2591b1743276d700b23d5) [#3898](https://github.com/mobxjs/mobx/pull/3898) Thanks [@inoyakaigor](https://github.com/inoyakaigor)! - Added new Set methods ## 6.12.5 ### Patch Changes - [`ba890343`](https://github.com/mobxjs/mobx/commit/ba8903430ce96746db5dcde6b78edeb195ea8018) [#3893](https://github.com/mobxjs/mobx/pull/3893) Thanks [@g6123](https://github.com/g6123)! - Fix ES6 Map/Set checks for cross-window scripts ## 6.12.4 ### Patch Changes - [`e9e1955f`](https://github.com/mobxjs/mobx/commit/e9e1955f745545d796d906b6e0ba04a6cde3f1ee) [#3880](https://github.com/mobxjs/mobx/pull/3880) Thanks [@peterm-canva](https://github.com/peterm-canva)! - Shrink ComputedValue using a bitfield ## 6.12.2 ### Patch Changes - [`61abc53f`](https://github.com/mobxjs/mobx/commit/61abc53ff10554d1d5ce3e85466f6beda4d63fa2) [#3852](https://github.com/mobxjs/mobx/pull/3852) Thanks [@mweststrate](https://github.com/mweststrate)! - Patched the release process, forcing release to get everything in pristine state. * [`b28e0ebb`](https://github.com/mobxjs/mobx/commit/b28e0ebbfc9aa11293bc185216da92997e497fd3) [#3816](https://github.com/mobxjs/mobx/pull/3816) Thanks [@barroij](https://github.com/barroij)! - Fix `IReactionDisposer` and `IIsObservableObject` interface definition so that Typescript knows the property key `$mobx` is a symbol and not a string ## 6.12.1 ### Patch Changes - [`620f78c7`](https://github.com/mobxjs/mobx/commit/620f78c74e66bc532a96e28b26fd2d0ed1b67d54) [#3812](https://github.com/mobxjs/mobx/pull/3812) Thanks [@barroij](https://github.com/barroij)! - Prevent `reaction` from heeping a Reference to the OldValue that would prevent GC. * [`6111b093`](https://github.com/mobxjs/mobx/commit/6111b0939d0d3c0d46dc325ba6bbd5f740a161d3) [#3833](https://github.com/mobxjs/mobx/pull/3833) Thanks [@realyze](https://github.com/realyze)! - Reduce memory overhead of tracking dependencies ## 6.12.0 ### Minor Changes - [`ec5db592`](https://github.com/mobxjs/mobx/commit/ec5db592d7756826c31e710b1c759d7e9406b153) [#3792](https://github.com/mobxjs/mobx/pull/3792) Thanks [@tonyraoul](https://github.com/tonyraoul)! - Improve observablearray proxy pefromance for es2023.array and es2022.array methods ### Patch Changes - [`86616c11`](https://github.com/mobxjs/mobx/commit/86616c11c108a511331eb05e55c08fc2c5a23f4d) [#3654](https://github.com/mobxjs/mobx/pull/3654) Thanks [@ahoisl](https://github.com/ahoisl)! - fix: action transparently forwards toString of underlying function ## 6.11.0 ### Minor Changes - [`c9260974`](https://github.com/mobxjs/mobx/commit/c9260974f726f58de0fd4974ea024c644d9b7c6f) [#3790](https://github.com/mobxjs/mobx/pull/3790) Thanks [@mweststrate](https://github.com/mweststrate)! - Added support for modern 2022.3 Decorators. [#3790](https://github.com/mobxjs/mobx/pull/3790) - [Installation / usage instruction](https://mobx.js.org/enabling-decorators.html). - [Introduction announcement](https://michel.codes/blogs/mobx-decorators) - Original PR by [@Matchlighter](https://github.com/Matchlighter) in [#3638](https://github.com/mobxjs/mobx/pull/3638), ## 6.10.2 ### Patch Changes - [`c8d9374d`](https://github.com/mobxjs/mobx/commit/c8d9374d4f3b05cfec0d690e0eb3ada4f619ff0b) [#3748](https://github.com/mobxjs/mobx/pull/3748) Thanks [@mweststrate](https://github.com/mweststrate)! - Fixed: #3747, computed values becoming stale if the underlying observable was created and updated outside a reactive context ## 6.10.1 ### Patch Changes - [`3ceeb865`](https://github.com/mobxjs/mobx/commit/3ceeb8651e328c4c7211c875696b3f5269fea834) [#3732](https://github.com/mobxjs/mobx/pull/3732) Thanks [@urugator](https://github.com/urugator)! - - fix: #3728: Observable initialization updates state version. - fix: Observable set initialization violates `enforceActions: "always"`. - fix: Changing keys of observable object does not respect `enforceActions`. ## 6.10.0 ### Minor Changes - [`bebd5f05`](https://github.com/mobxjs/mobx/commit/bebd5f0507a109145f401c78630ed9d59e4a1101) [#3727](https://github.com/mobxjs/mobx/pull/3727) Thanks [@rluvaton](https://github.com/rluvaton)! - Added support for `signal` (AbortSignal) in `autorun`, `reaction` and sync `when` options to dispose them ### Patch Changes - [`55f78ddc`](https://github.com/mobxjs/mobx/commit/55f78ddc20e84f38a7aa88b99a51ad994e558241) [#3717](https://github.com/mobxjs/mobx/pull/3717) Thanks [@liucan233](https://github.com/liucan233)! - remove proxy option for makeObservable and makeAutoObservable ## 6.9.1 ### Patch Changes - [`4792303e`](https://github.com/mobxjs/mobx/commit/4792303ec9119c1ba54134fff7e845d21a1d9337) [#3709](https://github.com/mobxjs/mobx/pull/3709) Thanks [@kubk](https://github.com/kubk)! - Make trace() noop in production build ## 6.9.0 ### Minor Changes - [`44a2cf42`](https://github.com/mobxjs/mobx/commit/44a2cf42dec7635f639ddbfb19202ebc710bac54) [#3590](https://github.com/mobxjs/mobx/pull/3590) Thanks [@urugator](https://github.com/urugator)! - Better support for React 18: Mobx now keeps track of a global state version, which updates with each mutation. ## 6.8.0 ### Minor Changes - [`fed3ff14`](https://github.com/mobxjs/mobx/commit/fed3ff14ca4dcbc788c4678e6d3f4edf747ffdb0) [#3608](https://github.com/mobxjs/mobx/pull/3608) Thanks [@emereum](https://github.com/emereum)! - Do not expose the methods `observe_` or `intercept_` on computed values and observable values. ### Patch Changes - [`42f8ac05`](https://github.com/mobxjs/mobx/commit/42f8ac057ec70c508232339016cc7249123f0fd0) [#3596](https://github.com/mobxjs/mobx/pull/3596) Thanks [@urugator](https://github.com/urugator)! - fix #3595 onBecomeObserved is not called for ObservableSet * [`2bccc5b3`](https://github.com/mobxjs/mobx/commit/2bccc5b3ca1df6444c942c715718519d590281e0) [#3583](https://github.com/mobxjs/mobx/pull/3583) Thanks [@urugator](https://github.com/urugator)! - fix #3582: AbortSignal leaks @types/node - [`7095fa45`](https://github.com/mobxjs/mobx/commit/7095fa4569afb538b7f153ce2b2a8078f2dbe1fc) [#3609](https://github.com/mobxjs/mobx/pull/3609) Thanks [@emereum](https://github.com/emereum)! - Restore generic types for newValue and oldValue on IValueDidChange and IBoxDidChange. ## 6.7.0 ### Minor Changes - [`8cf4784f`](https://github.com/mobxjs/mobx/commit/8cf4784f53857cc977aed641bd778f2c14a080f5) [#3559](https://github.com/mobxjs/mobx/pull/3559) Thanks [@urugator](https://github.com/urugator)! - Proxied observable arrays can now safely read/write out of bound indices. See https://github.com/mobxjs/mobx/discussions/3537 * [`223e3688`](https://github.com/mobxjs/mobx/commit/223e3688631528a327c79d39e2f497c6e1506165) [#3551](https://github.com/mobxjs/mobx/pull/3551) Thanks [@deadbeef84](https://github.com/deadbeef84)! - Added new option `signal` to `when()`, to support abortion using an AbortSignal / AbortController. ### Patch Changes - [`fe25cfed`](https://github.com/mobxjs/mobx/commit/fe25cfede0aee3bddd7fa434a14ed4b40a57ee26) [#3566](https://github.com/mobxjs/mobx/pull/3566) Thanks [@upsuper](https://github.com/upsuper)! - Make return value of reportObserved match invoke of onBecomeObserved ## 6.6.2 ### Patch Changes - [`b375535c`](https://github.com/mobxjs/mobx/commit/b375535c422453963f5d3485a2ef5233568c12a6) [#3344](https://github.com/mobxjs/mobx/pull/3344) Thanks [@Nokel81](https://github.com/Nokel81)! - Allow readonly tuples as part of IObservableMapInitialValues * [`7260cd41`](https://github.com/mobxjs/mobx/commit/7260cd413b1e52449523826ac239c2a197b2880f) [#3516](https://github.com/mobxjs/mobx/pull/3516) Thanks [@urugator](https://github.com/urugator)! - fix regression #3514: LegacyObservableArray compat with Safari 9.\* - [`78d1aa23`](https://github.com/mobxjs/mobx/commit/78d1aa2362b4dc5d521518688d6ac7e2d4f7ad3a) [#3458](https://github.com/mobxjs/mobx/pull/3458) Thanks [@egilll](https://github.com/egilll)! - A slight revamp of the README, wording, and clearer links ## 6.6.1 ### Patch Changes - [`63698d06`](https://github.com/mobxjs/mobx/commit/63698d0681988194bac5fc01851882b417b35f18) [#3427](https://github.com/mobxjs/mobx/pull/3427) Thanks [@RyanCavanaugh](https://github.com/RyanCavanaugh)! - Apply 'object' constraint where required ## 6.6.0 ### Minor Changes - [`8e204c7b`](https://github.com/mobxjs/mobx/commit/8e204c7b7d1dbad597761fa83beda77f027ee34c) [#3409](https://github.com/mobxjs/mobx/pull/3409) Thanks [@Nokel81](https://github.com/Nokel81)! - Remove observable.box type inconsistancy ## 6.5.0 ### Minor Changes - [`767baff0`](https://github.com/mobxjs/mobx/commit/767baff0373e5a5e2b7da274b25042078f9a205c) [#3338](https://github.com/mobxjs/mobx/pull/3338) Thanks [@kubk](https://github.com/kubk)! - Replace any with a generic in Set methods ## 6.4.2 ### Patch Changes - [`2caf7e1a`](https://github.com/mobxjs/mobx/commit/2caf7e1a3504dde3d7c9bde3c6fb56ca85168018) [#3316](https://github.com/mobxjs/mobx/pull/3316) Thanks [@urugator](https://github.com/urugator)! - `requiresObservable` always takes precedence over global `reactionRequiresObservable` ## 6.4.1 ### Patch Changes - [`d6fa9a19`](https://github.com/mobxjs/mobx/commit/d6fa9a1970ebfb8a8adaf5bf0dc73125acec2dee) [#3306](https://github.com/mobxjs/mobx/pull/3306) Thanks [@urugator](https://github.com/urugator)! - fix missing type inferrence of `observe` and `intercept` for arrays ## 6.4.0 ### Minor Changes - [`6b926833`](https://github.com/mobxjs/mobx/commit/6b926833ac7abbf92ff5c309613d2345f72527ee) [#3287](https://github.com/mobxjs/mobx/pull/3287) Thanks [@kubk](https://github.com/kubk)! - Remove any from 'merge' and 'replace' methods of ObservableMap ### Patch Changes - [`dee35be4`](https://github.com/mobxjs/mobx/commit/dee35be427989b6adc3c8f7ae8dc632ea66f3538) [#3300](https://github.com/mobxjs/mobx/pull/3300) Thanks [@kubk](https://github.com/kubk)! - Make the error message about Object.freeze more informative ## 6.3.13 ### Patch Changes - [`23803202`](https://github.com/mobxjs/mobx/commit/2380320263f5edcd06d7ba6bdf02aff3fd7d305a) [#3273](https://github.com/mobxjs/mobx/pull/3273) Thanks [@urugator](https://github.com/urugator)! - fix `flow.bound` #3271 ## 6.3.12 ### Patch Changes - [`654a2013`](https://github.com/mobxjs/mobx/commit/654a2013107ac6e5bbe3851e4eed22f0c9130525) [#3257](https://github.com/mobxjs/mobx/pull/3257) Thanks [@urugator](https://github.com/urugator)! - fix: observable map initialization violates `enforceActions: "always"` ## 6.3.11 ### Patch Changes - [`bf5da6ba`](https://github.com/mobxjs/mobx/commit/bf5da6bad982dc3d955d5f27f7fea6f94b041ea7) [#3239](https://github.com/mobxjs/mobx/pull/3239) Thanks [@bernardobelchior](https://github.com/bernardobelchior)! - Improved `toJS` jsdoc ## 6.3.10 ### Patch Changes - [`2d70798e`](https://github.com/mobxjs/mobx/commit/2d70798eb327187d93757757ceaf410a608735b2) [#3233](https://github.com/mobxjs/mobx/pull/3233) Thanks [@anderlaw](https://github.com/anderlaw)! - `eq.ts` fix comparer logic ## 6.3.9 ### Patch Changes - [`87e5a037`](https://github.com/mobxjs/mobx/commit/87e5a03735dbc1930e54a15b5ce88ad684bc3dc1) [#3214](https://github.com/mobxjs/mobx/pull/3214) Thanks [@urugator](https://github.com/urugator)! - `requiresReaction` always takes precedence over global `computedRequiresReaction` * [`9b90e25c`](https://github.com/mobxjs/mobx/commit/9b90e25c7bc0cdc0a07d1f847683604e86790f24) [#3198](https://github.com/mobxjs/mobx/pull/3198) Thanks [@urugator](https://github.com/urugator)! - fix `isPlainObject` impl (fixes #3197) ## 6.3.8 ### Patch Changes - [`9d5e65cb`](https://github.com/mobxjs/mobx/commit/9d5e65cbd612f262d925e57cebb559f5cf36c502) [#3193](https://github.com/mobxjs/mobx/pull/3193) Thanks [@ChocolateLoverRaj](https://github.com/ChocolateLoverRaj)! - Make `IAtom['reportObserved']` return `boolean` * [`55508af6`](https://github.com/mobxjs/mobx/commit/55508af690fa875e6affaf30f34280b3f27b6126) [#3189](https://github.com/mobxjs/mobx/pull/3189) Thanks [@RvanderLaan](https://github.com/RvanderLaan)! - Fix for RangeError in ObservableArray.replace for large arrays ## 6.3.7 ### Patch Changes - [`3a7dee6f`](https://github.com/mobxjs/mobx/commit/3a7dee6fdaddbb4b79205b054601a8020c226fcc) [#3180](https://github.com/mobxjs/mobx/pull/3180) Thanks [@kubk](https://github.com/kubk)! - Fix type inference of observe function ## 6.3.6 ### Patch Changes - [`49468204`](https://github.com/mobxjs/mobx/commit/49468204d3bc28d15dbf383c0b7f874ca26dff30) [#3162](https://github.com/mobxjs/mobx/pull/3162) Thanks [@upsuper](https://github.com/upsuper)! - Have cancelled when reject with an error rather than a string * [`4afb1ec2`](https://github.com/mobxjs/mobx/commit/4afb1ec24427cf8e1f768d0c6fc49d0f44f4ab8e) [#3154](https://github.com/mobxjs/mobx/pull/3154) Thanks [@urugator](https://github.com/urugator)! - `makeObservable` throws when mixing @decorator syntax with annotations ## 6.3.5 ### Patch Changes - [`4ac6b454`](https://github.com/mobxjs/mobx/commit/4ac6b45473c2e3b07c8e683cd395bc5edfaa8e15) [#3146](https://github.com/mobxjs/mobx/pull/3146) Thanks [@urugator](https://github.com/urugator)! - fix #3109: spy: computed shouldn't report update unless the value changed ## 6.3.4 ### Patch Changes - [`0dbf3eb6`](https://github.com/mobxjs/mobx/commit/0dbf3eb6eecfa9cd6cd9dc7d707e8d70927e79bf) [#3141](https://github.com/mobxjs/mobx/pull/3141) Thanks [@urugator](https://github.com/urugator)! - [spy: bound actions report correct object](https://github.com/mobxjs/mobx/discussions/3140) ## 6.3.3 ### Patch Changes - [`d78a1592`](https://github.com/mobxjs/mobx/commit/d78a15929052b96698b3355a0b4c8335750422db) [#2902](https://github.com/mobxjs/mobx/pull/2902) Thanks [@z3rog](https://github.com/z3rog)! - chore: observable use internal constants * [`db21d85f`](https://github.com/mobxjs/mobx/commit/db21d85fcd41c6c142998f53e722ee0a0e9b5c18) [#2998](https://github.com/mobxjs/mobx/pull/2998) Thanks [@urugator](https://github.com/urugator)! - `trace()`: log when computed becomes suspended `requiresReaction` warns instead of throwing - [`b9fa119c`](https://github.com/mobxjs/mobx/commit/b9fa119c90e23d4b327763189f24c00be2fb2c26) [#3056](https://github.com/mobxjs/mobx/pull/3056) Thanks [@upsuper](https://github.com/upsuper)! - Create WHEN_TIMEOUT error earlier to capture useful stack * [`99491ec2`](https://github.com/mobxjs/mobx/commit/99491ec2d315a3a01cdbe40d9a24d920a09cbd0e) [#2972](https://github.com/mobxjs/mobx/pull/2972) Thanks [@kk-gjyang](https://github.com/kk-gjyang)! - Polyfill `Object.is` for old/unsupported browsers - [`0d28db8a`](https://github.com/mobxjs/mobx/commit/0d28db8a0ba99f5cce744bb83b5bd88ec45a7e41) [#2927](https://github.com/mobxjs/mobx/pull/2927) Thanks [@upsuper](https://github.com/upsuper)! - Give proper typing to opts.equals of reaction * [`c6dc925c`](https://github.com/mobxjs/mobx/commit/c6dc925c6cf7eeff9237ee07c55927a7bbc14cb7) [#2985](https://github.com/mobxjs/mobx/pull/2985) Thanks [@fecqs](https://github.com/fecqs)! - Remove duplicate global property check ## 6.3.2 ### Patch Changes - [`4011b378`](https://github.com/mobxjs/mobx/commit/4011b3789d57e3dab0b85a835fe2979033133ce9) [#2949](https://github.com/mobxjs/mobx/pull/2949) Thanks [@urugator](https://github.com/urugator)! - fix #2948: flow ignores `autoBind` option ## 6.3.1 ### Patch Changes - [`d678ebd7`](https://github.com/mobxjs/mobx/commit/d678ebd7e54efb3aeae4541f87f5bcf93a623ec6) [#2944](https://github.com/mobxjs/mobx/pull/2944) Thanks [@urugator](https://github.com/urugator)! - Fix [#2941](https://github.com/mobxjs/mobx/issues/2941) - flow.bound replaces method on proto with bound function ## 6.3.0 ### Minor Changes - [`035bf409`](https://github.com/mobxjs/mobx/commit/035bf4096dd72d296af1fc25304adaade73cc7eb) [#2906](https://github.com/mobxjs/mobx/pull/2906) Thanks [@urugator](https://github.com/urugator)! - Provide `flow.bound` annotation/decorator ### Patch Changes - [`3dedb4d4`](https://github.com/mobxjs/mobx/commit/3dedb4d4b5376f3991183923838da942a9a81506) [#2904](https://github.com/mobxjs/mobx/pull/2904) Thanks [@ahoisl](https://github.com/ahoisl)! - Make toJS work with computed value props ## 6.2.0 ### Minor Changes - [`bc8db3df`](https://github.com/mobxjs/mobx/commit/bc8db3df9405034999f8feb8c95ba8045c7ae008) [#2779](https://github.com/mobxjs/mobx/pull/2779) Thanks [@urugator](https://github.com/urugator)! - In mobx5 all own properties were by default observable regardless of their value. Since mobx6 we treat functional properties as `action`s or to be precise `autoAction`s. `autoAction` provides `action`'s benefits to your functions, without the need to explicitely annotate them as `actions`. We think this is useful, but as a consequence, such properties are no longer `observable` and therefore non-writable and also non-enumerable. This turned out to be suprising and inconvinient to some users: https://github.com/mobxjs/mobx/discussions/2760 https://github.com/mobxjs/mobx/discussions/2586 https://github.com/mobxjs/mobx/issues/2835 https://github.com/mobxjs/mobx/issues/2629 https://github.com/mobxjs/mobx/issues/2551 https://github.com/mobxjs/mobx/issues/2637 So we decided to change it: All _own_ props _including functions_ are `observable` (enumerable, writable) as in v5, but additionally all functions that become part of deeply observable structure are by default converted to `autoAction`/`flow`. Note that `deep` option affects this conversion in the same way as it affects conversion of other values (object/array/map/set). - by default all functions are converted to `autoAction`s/`flow`s - by default all originally _own_ props are now observable and enumerable (as in pre v6) - `deep: false` ignores _all_ property values (including functions that would be previously converted to `autoAction`/`flow`) - by default _lone_ setters are converted to `action`s ### Patch Changes - [`16cab8b1`](https://github.com/mobxjs/mobx/commit/16cab8b14cf4a0d995d3f367123abfab5aed8326) [#2806](https://github.com/mobxjs/mobx/pull/2806) Thanks [@urugator](https://github.com/urugator)! - Annotations refactor - reduced code duplication * [`6b324edc`](https://github.com/mobxjs/mobx/commit/6b324edc69e7e9041a01e20d2e86f424046f3e25) [#2873](https://github.com/mobxjs/mobx/pull/2873) Thanks [@urugator](https://github.com/urugator)! - Fix [#2871](https://github.com/mobxjs/mobx/issues/2871): `toJS` throws with `configure({ useProxies: "ifavailable" })` - [`b5141883`](https://github.com/mobxjs/mobx/commit/b5141883434cba86b257d68a7badff5038c14296) [#2872](https://github.com/mobxjs/mobx/pull/2872) Thanks [@urugator](https://github.com/urugator)! - Fix [#2859](https://github.com/mobxjs/mobx/issues/2859): Trace log only if derivation is actually about to re-run * [`0945c265`](https://github.com/mobxjs/mobx/commit/0945c26513057457e1534a80558a3eb98487dc96) [#2840](https://github.com/mobxjs/mobx/pull/2840) Thanks [@iChenLei](https://github.com/iChenLei)! - export IComputedFactory typescript type definition ## 6.1.8 ### Patch Changes - [`ca4914f9`](https://github.com/mobxjs/mobx/commit/ca4914f978aef427e7b2223328fd66b82e522d89) [#2836](https://github.com/mobxjs/mobx/pull/2836) Thanks [@urugator](https://github.com/urugator)! - Fix [#2832](https://github.com/mobxjs/mobx/issues/2832) - annotation cache ignores overrides ## 6.1.7 ### Patch Changes - [`5640aa77`](https://github.com/mobxjs/mobx/commit/5640aa7794420a5fc2f99ac0819de11696d6ba71) [#2799](https://github.com/mobxjs/mobx/pull/2799) Thanks [@urugator](https://github.com/urugator)! - - fix: user provided debug names are not preserved on production - fix: property atom's debug name is dynamic on production - fix: `observable(primitive, options)` ignores `options` - fix: `getDebugName(action)` throws `[MobX] Cannot obtain atom from undefined` - [fix: terser using `unsafe: true`](https://github.com/mobxjs/mobx/issues/2751#issuecomment-778171773) ## 6.1.6 ### Patch Changes - [`9b195b17`](https://github.com/mobxjs/mobx/commit/9b195b17bd661b9c0c4ab3a8ef323e23c2f118e4) [#2780](https://github.com/mobxjs/mobx/pull/2780) Thanks [@iChenLei](https://github.com/iChenLei)! - The overall memory usage of MobX has been reduced in production builds by skipping the generation of debug identifiers. The internal `mapid_` field of Reaction has been removed as part of the change. ## 6.1.5 ### Patch Changes - [`3979bee3`](https://github.com/mobxjs/mobx/commit/3979bee36c82d342050978834197ea15a7ddbbf8) [#2773](https://github.com/mobxjs/mobx/pull/2773) Thanks [@urugator](https://github.com/urugator)! - Decorators optimization * [`7820e5ea`](https://github.com/mobxjs/mobx/commit/7820e5eae0c9dcdfa1e69cf92e0bfa209b2b478b) [#2769](https://github.com/mobxjs/mobx/pull/2769) Thanks [@iChenLei](https://github.com/iChenLei)! - add warn for extending builtins - [`a7c15171`](https://github.com/mobxjs/mobx/commit/a7c1517133915c2891e92a865fe5475627b6b89f) [#2775](https://github.com/mobxjs/mobx/pull/2775) Thanks [@pkit](https://github.com/pkit)! - use globalThis in global detection * [`5d41b646`](https://github.com/mobxjs/mobx/commit/5d41b6462cf609df869a088e353bc485846c88f8) [#2774](https://github.com/mobxjs/mobx/pull/2774) Thanks [@urugator](https://github.com/urugator)! - Fix: `makeAutoObservable` now working properly with symbolic keys Fix: `isComputedProp` and `getAtom` second arg type is incompatible with Symbols ## 6.1.4 ### Patch Changes - [`0677c0e7`](https://github.com/mobxjs/mobx/commit/0677c0e788bc11ceba909bba16b2b009e90a4c97) [#2766](https://github.com/mobxjs/mobx/pull/2766) Thanks [@urugator](https://github.com/urugator)! - Fix: Inherited annotated fields are not assignable ## 6.1.3 ### Patch Changes - [`d2a2a52e`](https://github.com/mobxjs/mobx/commit/d2a2a52e59e1cf5867bf72e49e7f134c7055ac5d) [#2763](https://github.com/mobxjs/mobx/pull/2763) Thanks [@vkrol](https://github.com/vkrol)! - Add `safeDescriptors` to `configure` options type ## 6.1.2 ### Patch Changes - [`ca09f2f5`](https://github.com/mobxjs/mobx/commit/ca09f2f5744f438b0b6572b60e055ca8b59646de) [#2761](https://github.com/mobxjs/mobx/pull/2761) Thanks [@urugator](https://github.com/urugator)! - `configure({ safeDescriptors: false })` now forces all props of observable objects to be writable and configurable ## 6.1.1 ### Patch Changes - [`39eca50d`](https://github.com/mobxjs/mobx/commit/39eca50de3936807037cb1205bbab29a3e328bc0) [#2757](https://github.com/mobxjs/mobx/pull/2757) Thanks [@urugator](https://github.com/urugator)! - Fix error stringification on minified build Fix `isObservableProp` not supporting `Symbols` Fix `makeAutoObservable` not ignoring `inferredAnnotationsSymbol` ## 6.1.0 This release fixes a plethora of bugs related to sub-classing and reflecting / iterating on observable objects. The behavior of MobX is in many edge cases much more explicitly defined now. A new annotation was introduced: `@override` / `override` to support re-defining actions and computed values(!) on sub classses. For idiomatic MobX usage this release should have little impact, but if you are using a lot of sub-classing, reflection APIs or direct object manipulations like `defineProperty`, this release might introduce previously unseen errors for cases that silently failed before, or even worked successfully even though the correct behavior wasn't specified earlier. If you are migrating from MobX 4/5 we strongly recommend to go to 6.1 in one go, and skip 6.0.\*, as some buggy behavior compared to the previous majors has been corrected. As always, our libraries come as-is and are maintained by volunteers. Upgrades are at own risk and voluntary. Bug reports require a minimal reproductions and a correctly filled out issue template. Support the ongoing maintenance at: https://opencollective.com/mobx ### Minor Changes [`28f8a11d`](https://github.com/mobxjs/mobx/commit/28f8a11d8b94f1aca2eec4ae9c5f45c5ea2f4362) [#2641](https://github.com/mobxjs/mobx/pull/2641) Thanks [@urugator](https://github.com/urugator)! - `action`, `computed`, `flow` defined on prototype can be overridden by subclass via `override` annotation/decorator. Previously broken. - Overriding anything defined on instance itself (`this`) is not supported and should throw. Previously partially possible or broken. - Attempt to re-annotate property always throws. Previously mostly undefined outcome. - All annotated and non-observable props (action/flow) are non-writable. Previously writable. - All annotated props of non-plain object are non-configurable. Previously configurable. - Observable object should now work more reliably in various (edge) cases. - Proxied objects now support `Object.defineProperty`. Previously unsupported/broken. - `extendObservable/makeObservable/defineProperty` notifies observers/listeners/interceptors about added props. Previously inconsistent. - `keys/values/entries` works like `Object.keys/values/entries`. Previously included only observables. - `has` works like `in`. Previously reported `true` only for existing own observable props. - `set` no longer transforms existing non-observable prop to observable prop, but simply sets the value. - `remove/delete` works with non-observable and computed props. Previously unsupported/broken. - Passing `options` to `observable/extendObservable/makeObservable` throws if the object is already observable . Previously passed options were mostly ignored. - `autoBind` option is now sticky - same as `deep` and `name` option. - `observable/extendObservable` now also picks non-enumerable keys (same as `make[Auto]Observable`). - Removed deprecated `action.bound("name")` - Proxied objects should be compatible with `Reflect` API. Previously throwing instead of returning booleans. ## 6.0.5 ### Patch Changes - [`6b304232`](https://github.com/mobxjs/mobx/commit/6b30423266e5418a3f20389d0bd0eae31f3384d2) [#2644](https://github.com/mobxjs/mobx/pull/2644) Thanks [@rokoroku](https://github.com/rokoroku)! - Fix broken error reference in errors.ts * [`83b84fd3`](https://github.com/mobxjs/mobx/commit/83b84fd354f2253fdd8ea556e217a92fc2633c00) [#2740](https://github.com/mobxjs/mobx/pull/2740) Thanks [@iChenLei](https://github.com/iChenLei)! - Infer optional / promise `action` args type correctly - [`65c7b73b`](https://github.com/mobxjs/mobx/commit/65c7b73b7f0b1a69a1a2786b5f484419d129d10b) [#2717](https://github.com/mobxjs/mobx/pull/2717) Thanks [@ahoisl](https://github.com/ahoisl)! - The TypeScript type `CreateObservableOptions` is now exported. * [`989390d4`](https://github.com/mobxjs/mobx/commit/989390d46bbe9941b61ac6c6d1292f96445e7cc3) [#2594](https://github.com/mobxjs/mobx/pull/2594) Thanks [@urugator](https://github.com/urugator)! - Fixed [#2579](https://github.com/mobxjs/mobx/issues/2579) - `observable` does not ignore class instances - [`dea1cf18`](https://github.com/mobxjs/mobx/commit/dea1cf189b0f43929f4f626229d34a80bd10212e) [#2726](https://github.com/mobxjs/mobx/pull/2726) Thanks [@mweststrate](https://github.com/mweststrate)! - fix: `onBecomeObserved` was not triggered correctly for computed dependencies of computeds. Fixes #2686, #2667 * [`592e6e99`](https://github.com/mobxjs/mobx/commit/592e6e996c2d5264e162cfb0921a071c1d815c92) [#2743](https://github.com/mobxjs/mobx/pull/2743) Thanks [@vkrol](https://github.com/vkrol)! - Remove `sideEffects` section in `mobx-react-lite` `package.json` > 🚨🚨🚨 If you are upgrading from V4/V5, please follow [the migration guide](https://mobx.js.org/migrating-from-4-or-5.html). ## 6.0.4 ### Patch Changes - [`79a09f49`](https://github.com/mobxjs/mobx/commit/79a09f49a9f2baddbab8d89e9a7ac07cffadf624) [#2615](https://github.com/mobxjs/mobx/pull/2615) Thanks [@urugator](https://github.com/urugator)! - Fix [#2614](https://github.com/mobxjs/mobx/issues/2614) - `makeObservable` does not respect `options.name` ## 6.0.3 ### Patch Changes - [`d0e6778d`](https://github.com/mobxjs/mobx/commit/d0e6778de73f6dfad61283c04103049732b2aea2) - Create ESM bundles with NODE_ENV correctly replaced so it can be used in browser (#2564) ## 6.0.2 ### Patch Changes - [`b5d64d19`](https://github.com/mobxjs/mobx/commit/b5d64d1965ecd9a593886279ddaf96eda61c4a77) [#2548](https://github.com/mobxjs/mobx/pull/2548) Thanks [@urugator](https://github.com/urugator)! - Fixed [2542](https://github.com/mobxjs/mobx/issues/2542), makeAutoObservable not respecting deep option [@urugator](https://github.com/urugator) * [`f4c22925`](https://github.com/mobxjs/mobx/commit/f4c229259a72f0497d3f9b6a05af9d9c4280d8b1) [#2582](https://github.com/mobxjs/mobx/pull/2582) Thanks [@tomenden](https://github.com/tomenden)! - Support running in a web-worker ## 6.0.1 - Fixed issue in TS typings of `makeObservable` in combination with a member named `toString()` ## 6.0.0 ### New features - [`makeObservable(target, annotations)`](../../docs/observable-state.md#makeobservable) is now the recommended way to make objects with a fixed shape observable, such as classes. - [`makeAutoObservable(target)`](../../docs/observable-state.md#makeautoobservable) will automatically determine the annotations used by `makeObservable`. Methods will be marked as 'autoAction', so that they can be used both from a computed value or as standalone method. - MobX 6 can be used in both modern environments, and environments that don't support Proxy. So both MobX 4 and 5 users can upgrade to 6. See [proxy support](../../docs/configuration.md#proxy-support) for more details. - `observable.array` now supports `{ proxy: false }` as option. - `reaction`'s effect function now receives the previous value seen by the reaction as second argument. - `flow` can now be used as annotation as well. You might need `flowResult` in case you use TypeScript to extract the correct result type. [details](../../docs/actions.md#using-flow-instead-of-async--await-). ### Breaking changes #### Changes that might affect you - The `decorate` API has been removed, and needs to be replaced by `makeObservable` in the constructor of the targeted class. It accepts the same arguments. The `mobx-undecorate` can transform this automatically. - When using `extendObservable` / `observable`, fields that contained functions used to be turned into observables. This is no longer the case, they will be converted into `autoActions`. - [Strict mode](../../docs/configuration.md#enforceactions) for actions is now enabled by default in `observed` mode. - `toJS` no longer takes any options. It no longer converts Maps and Sets to plain data structures. Generic, flexible serialization of data structures is out of scope for the MobX project, and writing custom serialization methods is a much more scalable approach to serialization (tip: leverage `computed`s to define how class instances should be serialized). - The methods `intercept` and `observe` are no longer exposed on observable arrays, maps and boxed observables. Import them as utility from mobx instead: `import { observe, intercept } from "mobx"`, and pass the collection as first argument: `observer(collection, callback)`. Note that we still recommend to avoid these APIs. - `observableMap.toPOJO()`, `observableMap.toJS()` have been dropped. Use `new Map(observableMap)` instead if you want to convert an observable map to a plain Map shallowly. - `observableMap.toJSON()` now returns an entries array rather than a new Map, to better support serialization. - `observableSet.toJS()` has been dropped. Use `new Set(observableSet)` instead if you want to convert an observable Set to a plain Set shallowly. - `observableSet.toJSON()` now returns an array rather than a new Set, to better support serialization. - Sorting or reversing an observableArray in a derivation (without slicing first) will now throw rather than warn. In contrast, it is now allowed to sort or reverse observable arrays in-place, as long as it happens in an action. - `isArrayLike` is no longer exposed as utility. Use `Array.isArray(x) || isObservableArray(x)` instead. #### Obscure things that don't work anymore, but that probably won't affect you - It is no longer possible to re-decorate a field (through either `@observable` or `makeObservable`) that is already declared in a super class. - `runInAction` no longer supports passing a name as first argument. Name the original function or use `action(name, fn)()` if you care about the debug name. - `computed(getterFn, setterFn)` no longer accepts a setter function as a second argument. Use the `set` option instead: `computed(getterFn, { set: setterFn })`. - In observable arrays, for `findIndex` / `find` method, the `offset` argument (the third one) is no longer supported, to be consistent with ES arrays. - The option `computedConfigurable` of `configure` is no longer supported as it is now the default. - `observableArray.toJS()` has been removed, use `observableArray.slice()` instead, which does the same. - Killed support for the `IGNORE_MOBX_MINIFY_WARNING` environment flag. - `_allowStateChangesInComputation(fn)` is no longer needed, use `runInAction(fn)` instead. - In `computed`, the `when` predicate (first arg), and `reaction` predicate (first arg) it is now forbidden to directly change state. State changes should be done in their effect functions, or otherwise at least wrapped in `runInAction` (only the state change, not the observables you want to track!). Note that this is still an anti-pattern. - The `observableArray.get()` and `observableArray.set()` methods are no longer supported. - The `IObservableObject` interface is no longer exported from MobX. - The second argument to the `reaction` effect function, the disposer object, is now passed in as third argument. The second argument is now the previous value seen by the reaction. - `onBecomeObserved` / `onBecomeUnobserved` will now only trigger for observables that are actually used by a reaction (see [#2309](https://github.com/mobxjs/mobx/issues/2309) for background). ### Fixes - [#2326](https://github.com/mobxjs/mobx/issues/2326): Incorrect `this` for array callbacks such as in `array.forEach` - [#2379](https://github.com/mobxjs/mobx/issues/2379): Fixed issue with `array.concat` - [#2309](https://github.com/mobxjs/mobx/issues/2309): Fixed several inconsistencies between keepAlive'd computed values and `on(un)BecomeObserved` - Fixed several inconsistencies when `on(un)BecomeObserved` was triggered for observables changed in actions without having an observer ## 5.15.7 / 4.15.7 - Fixed [2438](https://github.com/mobxjs/mobx/issues/2438), factory types caused eslint warnings, by [@amareis](https://github.com/Amareis) through [2439](https://github.com/mobxjs/mobx/pull/2439) - Fixed [2432](https://github.com/mobxjs/mobx/issues/2423), array.reduce without initial value by [@urugator](https://github.com/urugator) ## 5.15.6 / 4.15.6 - Fixed [2423](https://github.com/mobxjs/mobx/issues/2423), array methods not dehancing by [@urugator](https://github.com/urugator) - Fixed [2424](https://github.com/mobxjs/mobx/issues/2424) Map / Set instantiation triggering a strict warning, through [#2425](https://github.com/mobxjs/mobx/pull/2425) by [@moonball](https://github.com/moonball) ## 5.15.5 / 4.15.5 - Fixed ObservableSet.prototype.forEach not being reactive in 4.x [#2341](https://github.com/mobxjs/mobx/pull/2341) by [@melnikov-s](https://github.com/melnikov-s) - Add error when computed value declared for unspecified getter [#1867](https://github.com/mobxjs/mobx/issues/1867) by [@berrunder](https://github.com/berrunder) - Fixed [#2326](https://github.com/mobxjs/mobx/issues/2326) correct array is passed to callbacks by [@urugator](https://github.com/urugator) - Fixed [#2278](https://github.com/mobxjs/mobx/issues/2278), `map.delete` should respect strict mode, by [@urugator](https://github.com/urugator) - Fixed [#2253](https://github.com/mobxjs/mobx/issues/2253), [#1980](https://github.com/mobxjs/mobx/issues/1980), map key order not always preserved by [@urugator](https://github.com/urugator) - Fixed [#2412](https://github.com/mobxjs/mobx/issues/2412), non-enumerable getters not being picked up by `extendObservable` by [@urugator](https://github.com/urugator) - Several performance improvements - Dropped `browser` fields from `package.json` ## 5.15.4 / 4.15.4 - Fix process.env replacement in build [#2267](https://github.com/mobxjs/mobx/pull/2267) by [@fredyc](https://github.com/fredyc) ## 5.15.3 / 4.15.3 - Define action name to be as the function name [#2262](https://github.com/mobxjs/mobx/pull/2262) by [@nadavkaner](https://github.com/nadavkaner) ## 5.15.2 / 4.15.2 - Fixed [#2230](https://github.com/mobxjs/mobx/issue/2230) computedvalue: throw error object instead of string when options is empty [#2243](https://github.com/mobxjs/mobx/pull/2243) by [@ramkumarvenkat](https://github.com/ramkumarvenkat) - supports ES6 Sets and Maps in shallow comparer. [#2238](https://github.com/mobxjs/mobx/pull/2238) by [@hearnden](https://github.com/hearnden) - `extendObservable`: can be used existing properties again. Fixes [#2250](https://github.com/mobxjs/mobx/issue/2250) through [#2252](https://github.com/mobxjs/mobx/pull/2252) by [@davefeucht](https://github.com/davefeucht) ## 5.15.1 / 4.15.1 - Make initial values of observable set accept readonly array [#2202](https://github.com/mobxjs/mobx/pull/2202) - Expose `_allowStateReadsStart` & `_allowStateReadsEnd`. This is low level stuff you shouldn't need that's mostly useful for library creators. [#2233](https://github.com/mobxjs/mobx/pull/2233) - Fixed an issue with `observableRequiresReaction` and updating observable during reaction [#2195](https://github.com/mobxjs/mobx/pull/2196) - Improved type inference for `action` [#2213](https://github.com/mobxjs/mobx/pull/2213) ([see detailed explanation](https://github.com/mobxjs/mobx/pull/2218#discussion_r349889440)) ## 5.15.0 **The minimum required TypeScript version is now 3.6** - Fixed flow typings with Typescript v3.6. This means that version of Typescript is required when using flows. - Cancelled flows now reject with a `FlowCancellationError` instance whose error message is the same as in previous versions (`"FLOW_CANCELLED"`) so this is not breaking. [#2172](https://github.com/mobxjs/mobx/pull/2172) by [@vonovak](https://github.com/vonovak) - Fix running mobx in web worker [#2184](https://github.com/mobxjs/mobx/pull/2184/files) by [@shahata](https://github.com/shahata) - Fixed flow typings for Facebook's Flow. A new `CancellablePromise` Flow type is exported. [#2164](https://github.com/mobxjs/mobx/pull/2164) by [@vonovak](https://github.com/vonovak) - Added support for symbol keys on observable properties (MobX 5 only). [#2175](https://github.com/mobxjs/mobx/pull/2175) by [@StephenHaney](https://github.com/StephenHaney) ## 5.14.2 - Fixed installation issue trying to run `postinstall` hook for a website [#2165](https://github.com/mobxjs/mobx/issues/2165). ## 5.14.1 / 4.14.1 - Fixed a possible issue with action stack errors and multiple mobx versions installed at the same time [#2135](https://github.com/mobxjs/mobx/issues/2135). - Added `comparer.shallow` for shallow object/array comparisons [#1561](https://github.com/mobxjs/mobx/issues/1561). - Fixed disposing an interception within an interception throwing an error [#1950](https://github.com/mobxjs/mobx/issues/1950). ## 5.14.0 / 4.14.0 - Added experimental `reactionRequiresObservable` & `observableRequiresReaction` config [#2079](https://github.com/mobxjs/mobx/pull/2079), [Docs](https://github.com/mobxjs/mobx/pull/2082) - Added experimental `requiresObservable` config to `reaction`, `autorun` & `when` options [#2079](https://github.com/mobxjs/mobx/pull/2079), [Docs](https://github.com/mobxjs/mobx/pull/2082) ## 5.13.1 / 4.13.1 - Don't use `global` and `self` keywords unless defined. Fixes [#2070](https://github.com/mobxjs/mobx/issues/2070). - onBecome(Un)Observed didn't trigger when using number as key of observable map. Fixes [#2067](https://github.com/mobxjs/mobx/issues/2067). - Exposed `_startAction` and `_endAction` to be able to start and action and finish it without needing a code block. This is low level stuff you shouldn't need that's mostly useful for library creators. ## 5.13.0 / 4.13.0 - Fixed potential memory leak in observable maps, when non-primitive values are used as keys. Fixes [#2031](https://github.com/mobxjs/mobx/issues/2031) through [#2032](https://github.com/mobxjs/mobx/pull/2032). - Added support to store additional non-observable(!) fields (string or symbol based) on array, to better reflect behavior of MobX 4. Fixes [#2044](https://github.com/mobxjs/mobx/issues/2044) through [#2046](https://github.com/mobxjs/mobx/pull/2046) ## 5.11.0 / 4.12.0 - Added `computedConfigurable` config [#2011](https://github.com/mobxjs/mobx/pull/2011), [#2013](https://github.com/mobxjs/mobx/pull/2014) ## 4.11.0 **BREAKING CHANGE** Reverted the support of Symbols in general in MobX 4, as it gives to many potential build errors and increases the system requirements for MobX 4 (which was an oversight in 4.10.0). Apologies for the breaking change (lack of new major version numbers). If lock files are properly used however, no harm should be caused by this change. - Reverted `Symbol` support in observable maps and objects. Reverts [#1944](https://github.com/mobxjs/mobx/pull/1944) through [#1988](https://github.com/mobxjs/mobx/pull/1988). Fixes [#1986](https://github.com/mobxjs/mobx/issues/1986), [#1987](https://github.com/mobxjs/mobx/issues/1987) ## 5.10.1 - Fixed a recent regression where array update events would send undefined as `change.object` through [#1985](https://github.com/mobxjs/mobx/pull/1985) by [xaviergonz](https://github.com/xaviergonz) ## 5.10.0 / 4.10.0 - Added support for symbol named properties in maps and objects. Fixes [#1809](https://github.com/mobxjs/mobx/issues/1809) and [#1925](https://github.com/mobxjs/mobx/issues/1925) through [#1944](https://github.com/mobxjs/mobx/pull/1944) by [@loklaan](https://github.com/loklaan) - Added `set` support for `observable.set`, see [#1945](https://github.com/mobxjs/mobx/pull/1945) by [xaviergonz](https://github.com/xaviergonz) - Fixed events for arrays using the wrong object, [#1964](https://github.com/mobxjs/mobx/pull/1964) by [xaviergonz](https://github.com/xaviergonz) - Improved flow typings [#1960](https://github.com/mobxjs/mobx/pull/1960) by [@tbezman](https://github.com/tbezman) - Updated tooling, [#1949](https://github.com/mobxjs/mobx/pull/1949) and [#1931](https://github.com/mobxjs/mobx/pull/1931) by [xaviergonz](https://github.com/xaviergonz) ## 5.9.4 / 4.9.4 - Allow symbol keys in `ObservableMap`, see [#1930](https://github.com/mobxjs/mobx/pull/1930) by [pimterry](https://github.com/pimterry) - Fixed type definitions of `toStringTag` for Maps and Sets, see [#1929](https://github.com/mobxjs/mobx/pull/1929) by [lennerd](https://github.com/lennerd) ## 4.9.3 - Fixed `observable.set` compatibility with IE 11, see [#1917](https://github.com/mobxjs/mobx/pull/1917) by [kalmi](https://github.com/kalmi) ## 4.9.2 - Fixed regression [#1878](https://github.com/mobxjs/mobx/issues/1878), accidental use of `Symbol` breaking Internet Explorer / React Native compatibility. ## 4.9.1 - Fixed regression in `toJS`: observable maps were not properly serialized. Fixes [#1875](https://github.com/mobxjs/mobx/issues/1875) ## 5.9.0 / 4.9.0 **Features** - Introduced support for observable sets! Through [#1592](https://github.com/mobxjs/mobx/pull/1592) by [@newraina](https://github.com/newraina) - `observable.box` now accepts an `equals` option, to be able to pass a custom comparision function. Through [#1862](https://github.com/mobxjs/mobx/pull/1862), [#1874](https://github.com/mobxjs/mobx/pull/1874) by [@fi3ework](https://github.com/fi3ework). Fixes [#1580](https://github.com/mobxjs/mobx/issues/1580) - Improved logging of reactions; if an action throws an exception, errors in reactions that react to that are only logged as warnings. Fixes [#1836](https://github.com/mobxjs/mobx/issues/1836) **Fixes** - Improved typings for `flow`, see [#1827](https://github.com/mobxjs/mobx/pull/1827) by [@xaviergonz](https://github.com/xaviergonz) - Don't allow subclassing map, fixes [#1858](https://github.com/mobxjs/mobx/issues/1858) - Fixed `trace(true)` not being able to handle multi-line comments in traced function. Fixes [#1850](https://github.com/mobxjs/mobx/issues/1850) - `@computed` now introduces non-configurable properties, to fail fast on incorrect inheritance or property deletion. Fixes [#1867](https://github.com/mobxjs/mobx/issues/1867) - The options `enforceActions` and `isolateGlobalState` now work correctly when used together. Fixes [#1869](https://github.com/mobxjs/mobx/issues/1869) ## 5.8.0 / 4.8.0 - MobX now requires TypeScript 3 (this was already the case in 5.7.0, but in this version the difference is actually noticeable in the typings). - Fixed array dehancer sometimes skipping. Fixes [#1839](https://github.com/mobxjs/mobx/issues/1839) through [#1841](https://github.com/mobxjs/mobx/pull/1841) by [k-g-a](https://github.com/k-g-a) - Fixed issue where webpack 4 wouldn't use the ESM module [#1834](https://github.com/mobxjs/mobx/pull/1834) by [mrtnbroder](https://github.com/mrtnbroder) - Improved type inference for `flow` in TypeScript 3. Fixes [#1816](https://github.com/mobxjs/mobx/issue/1816) through [#1825](https://github.com/mobxjs/mobx/pull/1825) by [ismailhabib](https://github.com/ismailhabib) - Introduced support for global environment variable `IGNORE_MOBX_MINIFIY_WARNING=true` to skip the built-in minification warning. See [#1835](https://github.com/mobxjs/mobx/pull/1835) by [fi3ework](https://github.com/fi3ework) - Fixed onBecome(Un)Observed dispoer cleanup. Fixes [#1537](https://github.com/mobxjs/mobx/issues/1537) through [#1833](https://github.com/mobxjs/mobx/pull/1833) by [fi3ework](https://github.com/fi3ework) ## 5.7.1 / 4.7.1 - Fixed [#1839](https://github.com/mobxjs/mobx/issues/1839), ObservableArrayAdministration.dehanceValues does not dehance last value. ## 5.7.0 / 4.7.0 - Upgraded typings to TypeScript 3 - Fixed [#1742](https://github.com/mobxjs/mobx/issues/1742), change detection fails when multiple mobx instances were active. - Fixed [#1624](https://github.com/mobxjs/mobx/issues/1624), use built-in flow types for iterators - Fixed [#1777](https://github.com/mobxjs/mobx/issues/1777) through [#1826](https://github.com/mobxjs/mobx/pull/1826), stack overflow exception, in development mode, when using `@computed` on a React component. The MobX 5 behavior here has been reverted to the MobX 4 behavior. ## 5.6.0 / 4.6.0 - `keepAlive` has become smarter and won't recomputed computed values that are kept alive, as long as they aren't read. Implements [#1534](https://github.com/mobxjs/mobx/issues/1534) - Fixed [#1796](https://github.com/mobxjs/mobx/issues/1796), undeleting a property that had an initial value of `undefined` was undetected - Improved Flow typings, see [#1794](https://github.com/mobxjs/mobx/pull/1794) and [