v2.9.0

This version introduces a new core implementation. All tests are passing but there can be some regressions due to missing tests. Please feel free to report such cases and let's improve test coverage.

The benefit with the new implementation:

• Fix memory leak issue with vanilla store usage.
• More readability of the core code.

What's Changed

• feat: use new store by default by @dai-shi in #2641

Full Changelog: v2.8.4...v2.9.0

v2.8.4

This changes the behavior of async atom with abort signal on unmount to fix some use cases.

What's Changed

• fix: do not abort atoms on unmount by @Pinpickle in #2627

New Contributors

• @tcpdumppy made their first contribution in #2602
• @GregorGabric made their first contribution in #2605
• @ideabrian made their first contribution in #2614

Full Changelog: v2.8.3...v2.8.4

v2.8.3

The improvement for atomWithStorage in v2.8.2 contained a bug, which is fixed in this version.

What's Changed

• fix(utils): subscribe method of createJSONStorage should only run in the client by @mhsattarian in #2585
• feat(store2): add dev4_get_mounted_atoms by @arjunvegda in #2594

New Contributors

• @leo-diehl made their first contribution in #2590

Full Changelog: v2.8.2...v2.8.3

v2.8.2

This fixes another edge case and improves utils for more flexibility.

What's Changed

• fix(store2): "stuck" derived atoms where some derivations may never resolve by @backbone87 in #2448
• feat(utils): allow providing a subscribe method to createJSONStorage util by @mhsattarian in #2539
• fix(vanilla): fix store.ts for an edge case by @dai-shi in #2567

New Contributors

• @mhsattarian made their first contribution in #2539

Full Changelog: v2.8.1...v2.8.2

v2.8.1

This fixes a regression in v2.6.4 and a regression in v2.7.0.

What's Changed

• feat: add back dev4_restore_atoms to store v2 by @arjunvegda in #2509
• fix(core): update atom value with conditional dependencies (regression with #2363) by @probeiuscorp in #2534
• fix(store): properly update atom values with edge-case dependency by @dai-shi in #2555

New Contributors

• @lazybean made their first contribution in #2492
• @linjiajian999 made their first contribution in #2496
• @do7be made their first contribution in #2505
• @faizanu94 made their first contribution in #2507
• @ouweiya made their first contribution in #2514
• @trongthanh made their first contribution in #2524
• @probeiuscorp made their first contribution in #2534

Full Changelog: v2.8.0...v2.8.1

v2.8.0

This version introduces a new feature atomWithLazy and deprecates useReducerAtom and freezeAtomCreator. It also introduces an experimental store implementation in jotai/experimental.

Migration Guide

selectAtom

selectAtom will no longer internally unwrap promises. To migrate to the new api, use the unwrap utility from jotai/utils package.

// suppose we have this
const baseAtom = atom(Promise.resolve({ id: 0, name: 'test' }))

// previously selectAtom would internally unwrap promises.
const idAtom = selectAtom(
  baseAtom,
  ({ name }) => name,
  (prev, curr) => prev.id === curr.id
)

// instead, you need to import `unwrap` from 'jotai/utils' and pass the unwrapped atom 
import { unwrap } from 'jotai/utils'
  ...
const idAtom = selectAtom(
  unwrap(baseAtom),
  ({ name }) => name,
  (prev, curr) => prev.id === curr.id
)

useReducerAtom

https://jotai.org/docs/recipes/use-reducer-atom

freezeAtomCreator

https://jotai.org/docs/guides/debugging#freezeatomcreator

What's Changed

• [BREAKING] selectAtom does not resolve promises internally by @dmaskasky in #2435
• New store implementation as store2.ts by @dai-shi in #2463
• feat(utils): atomWithLazy for lazily initialized primitive atoms. by @iwoplaza in #2465
• deprecate useReducerAtom by @dai-shi in #2467
• fix(babel): do not depend on path by @dai-shi in #2482
• fix(utils): improve freezeAtom and freezeAtomCreator by @backbone87 in #2476
• deprecate freezeAtomCreator by @dai-shi in #2490

New Contributors

• @frameflare made their first contribution in #2483

Full Changelog: v2.7.2...v2.8.0

v2.7.2

Mostly refactors.

What's Changed

• refactor(vanilla): moved (un)mount guards into their respective functions. (suggestion) by @iwoplaza in #2457
• fix(vanilla): improve dual instance warning in DEV by @dai-shi in #2462
• refactor: no-any by @dai-shi in #2471
• fix: avoid slow types by @dai-shi in #2472

Full Changelog: v2.7.1...v2.7.2

v2.7.1

This fixes a regression in v2.7.0.

What's Changed

• fix(vanilla): store should flush pending write triggered asynchronously and indirectly by @iwoplaza in #2451
• fix(utils): atomWithStorage to always run onMount by @dai-shi in #2455

New Contributors

• @rothsandro made their first contribution in #2426
• @NehalDamania made their first contribution in #2441
• @tien made their first contribution in #2446
• @ashuvssut made their first contribution in #2445

Full Changelog: v2.7.0...v2.7.1

v2.7.0

We've improved the use of WeakMap for better memory management. Please report to us if any regressions are found.

What's Changed

• feat: atomWithRefresh by @dai-shi in #2393
• refactor: make pendingMap a WeakMap for better memory management by @dai-shi in #2396
• fix(utils): make 'unwrap' and 'loadable' able to access async atom's resolved value immediately by @iwoplaza in #2417
• fix(types): withStorageValidator by @dai-shi in #2418
• build: change rollup target to ES2018 by @amirhhashemi in #2419

Full Changelog: v2.6.5...v2.7.0

v2.6.5

Some type improvements!

What's Changed

• fix(types): useAtom with one type argument for primitive atoms by @dai-shi in #2386
• fix(types): fix withStorageValidator type by @dai-shi in #2410

New Contributors

• @henrikvilhelmberglund made their first contribution in #2391

Full Changelog: v2.6.4...v2.6.5