This release includes several small refactors to improve performance.

• fix(vanilla/utils/atomWithObservable): use symbol index signature to avoid 'Symbol.observable' type reference by @sukvvon in https://github.com/pmndrs/jotai/pull/3274
• refactor(internals): replace nextDeps with prevDeps by @dmaskasky in https://github.com/pmndrs/jotai/pull/3278
• refactor(internals): reduce recomputeInvalidatedAtoms overhead (performance) by @dmaskasky in https://github.com/pmndrs/jotai/pull/3284
• refactor(internals): reduce flushPending overhead (performance) by @dmaskasky in https://github.com/pmndrs/jotai/pull/3285
• fix(internals): check if atom has dependencies before doing mountDependencies work (performance) by @dmaskasky in https://github.com/pmndrs/jotai/pull/3290
• fix(internals): check if atom has onMount property before queueing processOnMount callback (performance) by @dmaskasky in https://github.com/pmndrs/jotai/pull/3291
• refactor(types): prefer no-any by @dai-shi in https://github.com/pmndrs/jotai/pull/3304

• @aio39 made their first contribution in https://github.com/pmndrs/jotai/pull/3277

Full Changelog: https://github.com/pmndrs/jotai/compare/v2.19.0...v2.19.1

We improved the core to enable atom caching for performance for some cases.

• fix(react): deprecate delay option by @dai-shi in https://github.com/pmndrs/jotai/pull/3264
• feat: improve store.get performance when atoms are not mutated by @dmaskasky in https://github.com/pmndrs/jotai/pull/3265

• @composite made their first contribution in https://github.com/pmndrs/jotai/pull/3268

Full Changelog: https://github.com/pmndrs/jotai/compare/v2.18.1...v2.19.0

This release fixes a regression introduced in v2.12.1, which affects an uncommon edge case.

• fix(vanilla): subscriber not notified when derived read calls store.set by @dmaskasky in https://github.com/pmndrs/jotai/pull/3245
• fix(vanilla/utils/atomWithObservable): add 'Symbol.observable' type support to 'ObservableLike' by @sukvvon in https://github.com/pmndrs/jotai/pull/3253
• refactor(vanilla/utils/atomWithStorage): use optional chaining for 'storage.subscribe' by @sukvvon in https://github.com/pmndrs/jotai/pull/3260

Full Changelog: https://github.com/pmndrs/jotai/compare/v2.18.0...v2.18.1

We moved jotai/babel to jotai-babel.

If you use the preset:

  {
-   "presets": ["jotai/babel/preset"]
+   "presets": ["jotai-babel/preset"]
  }

If you use a plugin:

  {
-   "plugins": ["jotai/babel/plugin-debug-label"]
+   "plugins": ["jotai-babel/plugin-debug-label"]
  }

• refactor(internals): simplify promise handing by @dai-shi in https://github.com/pmndrs/jotai/pull/3232
• feat: deprecate jotai/babel in favor of jotai-babel by @dai-shi in https://github.com/pmndrs/jotai/pull/3236
• fix: keep reactivity if get is called in a different atom by @dai-shi in https://github.com/pmndrs/jotai/pull/3241

• @pavan-sh made their first contribution in https://github.com/pmndrs/jotai/pull/3238

Full Changelog: https://github.com/pmndrs/jotai/compare/v2.17.1...v2.18.0

Small typing improvements. If you are using v2.16 or earlier, we recommend upgrading to the latest version.

• fix(core/types): Wrong variance on the WritableAtom Result type parameter by @atomanyih in https://github.com/pmndrs/jotai/pull/3135
• chore: leftover with #3219 by @dai-shi in https://github.com/pmndrs/jotai/pull/3231

• @atomanyih made their first contribution in https://github.com/pmndrs/jotai/pull/3135

Full Changelog: https://github.com/pmndrs/jotai/compare/v2.17.0...v2.17.1

This release deprecates some features, which will be dropped in v3.

• deprecate loadable util by @dai-shi in https://github.com/pmndrs/jotai/pull/3217
• breaking: remove unstable_onInit by @dai-shi in https://github.com/pmndrs/jotai/pull/3219
• deprecate setSelf in the atom read function by @dai-shi in https://github.com/pmndrs/jotai/pull/3220

Full Changelog: https://github.com/pmndrs/jotai/compare/v2.16.2...v2.17.0

Fixes unwrap and loadable, resolving a regression introduced in v2.15.2.

• fix(utils): unwrap should not violate the store mutation rule by @dai-shi in https://github.com/pmndrs/jotai/pull/3213

• @dev-itsheng made their first contribution in https://github.com/pmndrs/jotai/pull/3206

Full Changelog: https://github.com/pmndrs/jotai/compare/v2.16.1...v2.16.2

This fixes an internal API issue that affects ecosystem libraries.

• fix(internals): buildingblocks should not invoke buildingblock definitions from top-scope by @dmaskasky in https://github.com/pmndrs/jotai/pull/3197

Full Changelog: https://github.com/pmndrs/jotai/compare/v2.16.0...v2.16.1

This version deprecates atomFamily in jotai/utils in favor of jotai-family, and includes some internal changes.

• fix(internals): Minor tweaks to store internals by @dmaskasky in https://github.com/pmndrs/jotai/pull/3186
• feat(utils): deprecate atomFamily in jotai/utils (migrate to jotai-family) by @dmaskasky in https://github.com/pmndrs/jotai/pull/3187
• fix(internals): only mounted dependents can be added to mounted.t by @dmaskasky in https://github.com/pmndrs/jotai/pull/3189
• feat: rename to INTERNAL_onInit by @dai-shi in https://github.com/pmndrs/jotai/pull/3193

Full Changelog: https://github.com/pmndrs/jotai/compare/v2.15.2...v2.16.0

This release introduces some internal changes. In particular, it adds a warning when unsupported store mutations (side effects) are detected.

• fix(internals): add dev-only warning for unsupported side effect by @dai-shi in https://github.com/pmndrs/jotai/pull/3179
• refactor(utils): prefer onInit over setSelf by @dai-shi in https://github.com/pmndrs/jotai/pull/3172
• fix(internals): add storeHooks.i to be called when atomState is created by @dmaskasky in https://github.com/pmndrs/jotai/pull/3181

Full Changelog: https://github.com/pmndrs/jotai/compare/v2.15.1...v2.15.2