v10.0.0

10.0.0 (2025-12-10)

⚠ BREAKING CHANGES

• onError callback behavior change: onError is now properly called when cacheFlags is enabled and the API is unreachable with no existing cache (#365)

  • Previous behavior: init() would resolve successfully even when the API failed, silently swallowing the error
  • New behavior: init() now rejects and triggers onError, matching the behavior when cacheFlags: false
  • Migration: Ensure your code handles errors from init() or provide defaultFlags as a fallback

• SDK User-Agent header: The SDK now sends a Flagsmith-SDK-User-Agent header with requests (#344)

  • Self-hosted users: Requires Flagsmith v2.196.0 or higher
  • Alternative: If you cannot upgrade, add this environment variable to your Flagsmith server:

    FLAGSMITH_CORS_EXTRA_ALLOW_HEADERS: Flagsmith-SDK-User-Agent
    

Features

• re-add sdk version headers (#344) (47b610f)

Bug Fixes

• onError not called if cacheFlags is true and api is not reachable (#365) (1411b85)

Other

v9.3.5

9.3.5 (2025-12-08)

Bug Fixes

• revert User-Agent header again (#362) (53baaa9)

v9.3.4

9.3.4 (2025-11-18)

Bug Fixes

• angularHttpClient fetch error (#359) (44e4b79)
• catch init error in useFlagsmith (#351) (5380dc3)
• types: loading state source unresolved any (#360) (30c35a3)

CI

• fix trusted publishing (#355) (881c648)

v9.3.3

9.3.3 (2025-11-05)

Bug Fixes

• export FlagSource enum as runtime value (#349) (d480bb9)

CI

• add release please (#353) (353dbf7)

Other

• deps-dev: bump form-data from 4.0.0 to 4.0.4 (#331) (187feda)

9.3.2

What's Changed

• fix: CORS errors due to header changes by @khvn26 in #342
• chore: Add CODEOWNERS by @khvn26 in #339

Full Changelog: 9.3.1...9.3.2

9.3.1

What's Changed

• fix: typescript type generation when array of fields is passed. by @rushib1 in #325
• feat: send flagsmith sdk user agent by @Zaimwa9 in #332
• fix: renamed-sentry-client-interface by @Zaimwa9 in #335
• fix: make-id-optional-in-iflags by @Zaimwa9 in #336
• chore: bumped-react-native-version by @Zaimwa9 in #337

New Contributors

• @rushib1 made their first contribution in #325

Full Changelog: 9.3.0...9.3.1

9.3.0

What's Changed

Adds the Sentry integration

Full Changelog: 9.2.2...9.3.0

9.2.2

What's Changed

• fix: re-add support for flagsmith.identity by @kyle-ssg in #301

Full Changelog: 9.2.1...9.2.2

9.2.1

What's Changed

• fix: updated-interface-flags-for-javascript-client by @Zaimwa9 in #315
• fix: improved-on-change-and-fvalue-types by @Zaimwa9 in #316

Full Changelog: 9.2.0...9.2.1

9.2.0

What's Changed

• feat: send client info to Flagsmith by @tiagoapolo in #293
• Fix: typo in type definition file by @benwilson34 in #308
• fix: added-key-of-generic-record-and-tests by @Zaimwa9 in #311
• chore: bump-version by @Zaimwa9 in #312

New Contributors

• @benwilson34 made their first contribution in #308
• @Zaimwa9 made their first contribution in #311

Full Changelog: 9.1.0...9.2.0