# Changelog All notable changes to `@launchdarkly/js-sdk-common` will be documented in this file. This project adheres to [Semantic Versioning](http://semver.org). ## [2.25.2](https://github.com/launchdarkly/js-core/compare/js-sdk-common-v2.25.1...js-sdk-common-v2.25.2) (2026-07-21) ### Bug Fixes * Only redact anonymous contexts in custom events for server SDKs ([#1814](https://github.com/launchdarkly/js-core/issues/1814)) ([5a3b3fb](https://github.com/launchdarkly/js-core/commit/5a3b3fbc59e9a0b2d65221d65e54078ffa1bf433)) * Redact anonymous context attributes in migration op and custom events ([#1809](https://github.com/launchdarkly/js-core/issues/1809)) ([c84ec48](https://github.com/launchdarkly/js-core/commit/c84ec485e33ef27cc34610ec838b5466f3a5c96e)) ## [2.25.1](https://github.com/launchdarkly/js-core/compare/js-sdk-common-v2.25.0...js-sdk-common-v2.25.1) (2026-06-05) ### Bug Fixes * explicit return types and TS6 source compatibility fixes ([#1418](https://github.com/launchdarkly/js-core/issues/1418)) ([9c131a2](https://github.com/launchdarkly/js-core/commit/9c131a2e731c97a7fd4cf7ec1fe11efbbf49d6fb)) ## [2.25.0](https://github.com/launchdarkly/js-core/compare/js-sdk-common-v2.24.4...js-sdk-common-v2.25.0) (2026-05-21) ### Features * add X-LaunchDarkly-Instance-Id header to server-node SDK (SDK-2358) ([#1377](https://github.com/launchdarkly/js-core/issues/1377)) ([814dc0b](https://github.com/launchdarkly/js-core/commit/814dc0bfd6b152385f3a758f9eeca37a0f9f08e8)) ## [2.24.4](https://github.com/launchdarkly/js-core/compare/js-sdk-common-v2.24.3...js-sdk-common-v2.24.4) (2026-05-06) ### Bug Fixes * **server-node:** honor x-ld-fd-fallback directive in FDv2 initializer phase ([#1342](https://github.com/launchdarkly/js-core/issues/1342)) ([a80eaca](https://github.com/launchdarkly/js-core/commit/a80eacaafa6174e5f1b4fe21ba11534fdf1f92a8)) ## [2.24.3](https://github.com/launchdarkly/js-core/compare/js-sdk-common-v2.24.2...js-sdk-common-v2.24.3) (2026-04-30) ### Bug Fixes * **common:** remove non-spec fields from FDv2 GoodbyeObject ([#1341](https://github.com/launchdarkly/js-core/issues/1341)) ([feb9aa7](https://github.com/launchdarkly/js-core/commit/feb9aa7f6217bc9b3a9794bc71867e14112ea928)) ## [2.24.2](https://github.com/launchdarkly/js-core/compare/js-sdk-common-v2.24.1...js-sdk-common-v2.24.2) (2026-04-24) ### Bug Fixes * enabling eslint `ban-types` rule and fixed string typing ([#1313](https://github.com/launchdarkly/js-core/issues/1313)) ([f6d907f](https://github.com/launchdarkly/js-core/commit/f6d907f1a65abd0b41827f3c827e6dad896b16b1)) ## [2.24.1](https://github.com/launchdarkly/js-core/compare/js-sdk-common-v2.24.0...js-sdk-common-v2.24.1) (2026-04-14) ### Bug Fixes * FDv2 - Support dynamic reconnect URL for streaming. Handle 'error' event types for SSE. ([#1252](https://github.com/launchdarkly/js-core/issues/1252)) ([4ef6cdd](https://github.com/launchdarkly/js-core/commit/4ef6cdd3f07a15e9a6b3b831defcf41d10e6334b)) ## [2.24.0](https://github.com/launchdarkly/js-core/compare/js-sdk-common-v2.23.0...js-sdk-common-v2.24.0) (2026-03-23) ### Features * FDv2 types, refined validators, and DataManager interface ([#1207](https://github.com/launchdarkly/js-core/issues/1207)) ([d7ccfc1](https://github.com/launchdarkly/js-core/commit/d7ccfc1a5359610d70751dc08e3b894bb7ecf334)) ## [2.23.0](https://github.com/launchdarkly/js-core/compare/js-sdk-common-v2.22.0...js-sdk-common-v2.23.0) (2026-03-04) ### Features * Add isNullish utility to validators. ([#1137](https://github.com/launchdarkly/js-core/issues/1137)) ([0064365](https://github.com/launchdarkly/js-core/commit/0064365ba575e743c90370a9a48e56e0f232b973)) * Add oneOf validator to common validators. ([#1139](https://github.com/launchdarkly/js-core/issues/1139)) ([606fcf1](https://github.com/launchdarkly/js-core/commit/606fcf1919df8ad2aad35773c53df96a750a6c7d)) ## [2.22.0](https://github.com/launchdarkly/js-core/compare/js-sdk-common-v2.21.0...js-sdk-common-v2.22.0) (2026-02-25) ### Features * Add flag eval model for FDv2. ([#1124](https://github.com/launchdarkly/js-core/issues/1124)) ([028e63f](https://github.com/launchdarkly/js-core/commit/028e63f34eb0f11c5c0d8d078baf0ec378b9e8e0)) ## [2.21.0](https://github.com/launchdarkly/js-core/compare/js-sdk-common-v2.20.0...js-sdk-common-v2.21.0) (2026-02-25) ### Features * Refactor FDV2 protocol handling. ([4570089](https://github.com/launchdarkly/js-core/commit/4570089cd478cc5811a9a1c207231a96fdb5b39a)) ## [2.20.0](https://github.com/launchdarkly/js-core/compare/js-sdk-common-v2.19.0...js-sdk-common-v2.20.0) (2025-12-05) ### Features * add FDv2 FileDataSource initializer ([#1010](https://github.com/launchdarkly/js-core/issues/1010)) ([99931f0](https://github.com/launchdarkly/js-core/commit/99931f0706c0202390e3b68e3701ba0fb8aba124)) ## [2.19.0](https://github.com/launchdarkly/js-core/compare/js-sdk-common-v2.18.0...js-sdk-common-v2.19.0) (2025-07-23) ### Features * additional FDv2 functionality ([#898](https://github.com/launchdarkly/js-core/issues/898)) ([9ede15c](https://github.com/launchdarkly/js-core/commit/9ede15c757ed1b8c57b090716d44cf60a03da409)) ## [2.18.0](https://github.com/launchdarkly/js-core/compare/js-sdk-common-v2.17.0...js-sdk-common-v2.18.0) (2025-05-21) ### Features * Add support for per-context summary events. ([#859](https://github.com/launchdarkly/js-core/issues/859)) ([c9fa5c4](https://github.com/launchdarkly/js-core/commit/c9fa5c45f3ac2cbaad2f2e6312d5231c3f671d98)) ## [2.17.0](https://github.com/launchdarkly/js-core/compare/js-sdk-common-v2.16.0...js-sdk-common-v2.17.0) (2025-04-29) ### Features * Add client-side SDK plugin support. ([#834](https://github.com/launchdarkly/js-core/issues/834)) ([a843a33](https://github.com/launchdarkly/js-core/commit/a843a33e97dcab706a0034bd1fd1e3d2f78a9262)) ## [2.16.0](https://github.com/launchdarkly/js-core/compare/js-sdk-common-v2.15.0...js-sdk-common-v2.16.0) (2025-04-16) ### Features * Environment ID support for hooks ([#823](https://github.com/launchdarkly/js-core/issues/823)) ([63dc9f9](https://github.com/launchdarkly/js-core/commit/63dc9f9f1300c598e79be27909f8195ac66d54ef)) ## [2.15.0](https://github.com/launchdarkly/js-core/compare/js-sdk-common-v2.14.0...js-sdk-common-v2.15.0) (2025-04-08) ### Features * Option to use gzip to compress event ([#814](https://github.com/launchdarkly/js-core/issues/814)) ([4e91431](https://github.com/launchdarkly/js-core/commit/4e914317d31378e2a1eaed5aa03e0ac6beac43d5)) ## [2.14.0](https://github.com/launchdarkly/js-core/compare/js-sdk-common-v2.13.0...js-sdk-common-v2.14.0) (2025-03-26) ### Features * Support inline context for custom and migration events ([6aadf04](https://github.com/launchdarkly/js-core/commit/6aadf0463968f89bc3df10023267244c2ade1b31)) ### Bug Fixes * Deprecate LDMigrationOpEvent.contextKeys in favor of LDMigrationOpEvent.context ([6aadf04](https://github.com/launchdarkly/js-core/commit/6aadf0463968f89bc3df10023267244c2ade1b31)) ## [2.13.0](https://github.com/launchdarkly/js-core/compare/js-sdk-common-v2.12.0...js-sdk-common-v2.13.0) (2025-01-22) ### Features * Adds StreamingProcessor for FDv2 to sdk-server package. ([#707](https://github.com/launchdarkly/js-core/issues/707)) ([7f5c275](https://github.com/launchdarkly/js-core/commit/7f5c2750dcc8341d049d7e736ca21ec36e168703)) ### Bug Fixes * Remove outdated reference to geolocation. ([#719](https://github.com/launchdarkly/js-core/issues/719)) ([0eeb3b6](https://github.com/launchdarkly/js-core/commit/0eeb3b6472419d257bf52c4ab3ae33864eae1902)) ## [2.12.0](https://github.com/launchdarkly/js-core/compare/js-sdk-common-v2.11.0...js-sdk-common-v2.12.0) (2024-11-04) ### Features * Enhance basic logger destination support. ([#650](https://github.com/launchdarkly/js-core/issues/650)) ([21670c4](https://github.com/launchdarkly/js-core/commit/21670c4acd629f7ccfeb7abbe94fe89723533600)) ## [2.11.0](https://github.com/launchdarkly/js-core/compare/js-sdk-common-v2.10.0...js-sdk-common-v2.11.0) (2024-10-17) ### Features * Apply private property naming standard. Mangle browser private properties. ([#620](https://github.com/launchdarkly/js-core/issues/620)) ([3e6d404](https://github.com/launchdarkly/js-core/commit/3e6d404ae665c5cc7e5a1394a59c8f2c9d5d682a)) ### Bug Fixes * Update sdk-client rollup configuration to match common ([#630](https://github.com/launchdarkly/js-core/issues/630)) ([e061811](https://github.com/launchdarkly/js-core/commit/e06181158d29824ff0131a88988c84cd4a32f6c0)) ## [2.10.0](https://github.com/launchdarkly/js-core/compare/js-sdk-common-v2.9.0...js-sdk-common-v2.10.0) (2024-10-09) ### Features * Add ESM support for common and common-client (rollup) ([#604](https://github.com/launchdarkly/js-core/issues/604)) ([8cd0cdc](https://github.com/launchdarkly/js-core/commit/8cd0cdce988f606b1efdf6bfd19484f6607db2e5)) * Add visibility handling to allow proactive event flushing. ([#607](https://github.com/launchdarkly/js-core/issues/607)) ([819a311](https://github.com/launchdarkly/js-core/commit/819a311db6f56e323bb84c925789ad4bd19ae4ba)) * adds datasource status to sdk-client ([#590](https://github.com/launchdarkly/js-core/issues/590)) ([6f26204](https://github.com/launchdarkly/js-core/commit/6f262045b76836e5d2f5ccc2be433094993fcdbb)) ## [2.9.0](https://github.com/launchdarkly/js-core/compare/js-sdk-common-v2.8.0...js-sdk-common-v2.9.0) (2024-09-26) ### Features * Add platform support for async hashing. ([#573](https://github.com/launchdarkly/js-core/issues/573)) ([9248035](https://github.com/launchdarkly/js-core/commit/9248035a88fba1c7375c5df22ef6b4a80a867983)) * Add support for conditional event source capabilities. ([#577](https://github.com/launchdarkly/js-core/issues/577)) ([fe82500](https://github.com/launchdarkly/js-core/commit/fe82500f28cf8d8311502098aa6cc2e73932064e)) * Add URLs for custom events and URL filtering. ([#587](https://github.com/launchdarkly/js-core/issues/587)) ([7131e69](https://github.com/launchdarkly/js-core/commit/7131e6905f19cc10a1374aae5e74cec66c7fd6de)) * Adds support for REPORT. ([#575](https://github.com/launchdarkly/js-core/issues/575)) ([916b724](https://github.com/launchdarkly/js-core/commit/916b72409b63abdf350e70cca41331c4204b6e95)) * Allow using custom user-agent name. ([#580](https://github.com/launchdarkly/js-core/issues/580)) ([ed5a206](https://github.com/launchdarkly/js-core/commit/ed5a206c86f496942664dd73f6f8a7c602a1de28)) * Implement goals for client-side SDKs. ([#585](https://github.com/launchdarkly/js-core/issues/585)) ([fd38a8f](https://github.com/launchdarkly/js-core/commit/fd38a8fa8560dad0c6721c2eaeed2f3f5c674900)) ### Bug Fixes * Multi-kind context containing only 1 kind conveted incorrectly. ([#594](https://github.com/launchdarkly/js-core/issues/594)) ([b6ff2a6](https://github.com/launchdarkly/js-core/commit/b6ff2a67db9f9a24da4a45ad88fa7f2a22fb635d)) ## [2.8.0](https://github.com/launchdarkly/js-core/compare/js-sdk-common-v2.7.0...js-sdk-common-v2.8.0) (2024-09-03) ### Features * Add support for Payload Filtering ([#551](https://github.com/launchdarkly/js-core/issues/551)) ([6f44383](https://github.com/launchdarkly/js-core/commit/6f4438323baed802d8f951ac82494e6cfa9932c5)) ## [2.7.0](https://github.com/launchdarkly/js-core/compare/js-sdk-common-v2.6.0...js-sdk-common-v2.7.0) (2024-08-28) ### Features * Correct client evaluation typings. ([#554](https://github.com/launchdarkly/js-core/issues/554)) ([64ab88d](https://github.com/launchdarkly/js-core/commit/64ab88d278308564b4cd7b6433870c7adb09142a)) ## [2.6.0](https://github.com/launchdarkly/js-core/compare/js-sdk-common-v2.5.0...js-sdk-common-v2.6.0) (2024-08-12) ### Features * refactors the implementation of context caching. You can now s… ([#531](https://github.com/launchdarkly/js-core/issues/531)) ([8ab2ee4](https://github.com/launchdarkly/js-core/commit/8ab2ee425a35350a4f1c50e608c39fa3527da513)) ## [2.5.0](https://github.com/launchdarkly/js-core/compare/js-sdk-common-v2.4.2...js-sdk-common-v2.5.0) (2024-06-04) ### Features * Add support for a cancel-able timeout. ([#476](https://github.com/launchdarkly/js-core/issues/476)) ([24ecf1d](https://github.com/launchdarkly/js-core/commit/24ecf1d74b01e1fb32cd250689f17f96d1af1f50)) ## [2.4.2](https://github.com/launchdarkly/js-core/compare/js-sdk-common-v2.4.1...js-sdk-common-v2.4.2) (2024-04-26) ### Bug Fixes * Handle missing message with valid string. ([#450](https://github.com/launchdarkly/js-core/issues/450)) ([6ff8982](https://github.com/launchdarkly/js-core/commit/6ff8982d5a68f1fff4b8fcafc3eb015a75d3f002)) * Produce a warning when track is called with a non-numeric metric value. ([#449](https://github.com/launchdarkly/js-core/issues/449)) ([6799742](https://github.com/launchdarkly/js-core/commit/6799742a7914d32b3313e54408f0a2a3dda3ff5c)) ## [2.4.1](https://github.com/launchdarkly/js-core/compare/js-sdk-common-v2.4.0...js-sdk-common-v2.4.1) (2024-04-09) ### Bug Fixes * Add TimeoutError. ([#428](https://github.com/launchdarkly/js-core/issues/428)) ([aa832db](https://github.com/launchdarkly/js-core/commit/aa832db6172ba727aad9ec478b09a45906e9d5a7)) ## [2.4.0](https://github.com/launchdarkly/js-core/compare/js-sdk-common-v2.3.1...js-sdk-common-v2.4.0) (2024-04-09) ### Features * Add identify timeout to client-sdk. ([#420](https://github.com/launchdarkly/js-core/issues/420)) ([5d73dfe](https://github.com/launchdarkly/js-core/commit/5d73dfeb0d5cdacf620e65e214dd2e334363490e)) ### Bug Fixes * Identify incorrectly rejected in client-sdk ([#426](https://github.com/launchdarkly/js-core/issues/426)) ([a019dd6](https://github.com/launchdarkly/js-core/commit/a019dd66b1b852d888e10b78aec9693d7de195fe)) ## [2.3.1](https://github.com/launchdarkly/js-core/compare/js-sdk-common-v2.3.0...js-sdk-common-v2.3.1) (2024-03-25) ### Bug Fixes * Send identify event. ([#407](https://github.com/launchdarkly/js-core/issues/407)) ([1d73462](https://github.com/launchdarkly/js-core/commit/1d73462914cd35925d34a84b61492a52406b4083)) ## [2.3.0](https://github.com/launchdarkly/js-core/compare/js-sdk-common-v2.2.0...js-sdk-common-v2.3.0) (2024-03-15) ### Features * Always inline contexts for feature events ([#351](https://github.com/launchdarkly/js-core/issues/351)) ([961d21b](https://github.com/launchdarkly/js-core/commit/961d21bf1fef79f30c267cf30d0bccb4ad3feff6)) * Redact anonymous attributes within feature events ([#352](https://github.com/launchdarkly/js-core/issues/352)) ([8f7ad7e](https://github.com/launchdarkly/js-core/commit/8f7ad7e7ab0032491d11565a0943a5560c98052f)) ## [2.2.0](https://github.com/launchdarkly/js-core/compare/js-sdk-common-v2.1.1...js-sdk-common-v2.2.0) (2024-02-06) ### Features * Implement common client side support for auto environment attributes. ([#356](https://github.com/launchdarkly/js-core/issues/356)) ([8d80259](https://github.com/launchdarkly/js-core/commit/8d80259f7379827e46bef8bcf8293e3b2d966d25)) * Implement common support for auto environment attributes. ([#355](https://github.com/launchdarkly/js-core/issues/355)) ([9f562e5](https://github.com/launchdarkly/js-core/commit/9f562e51c60ac5bfff835e7f6724904939710148)) * React-native support for auto-env attributes. Only affects react-native package. ([deea99c](https://github.com/launchdarkly/js-core/commit/deea99ca2fbb3865f2ce55a83b2cf12e0ae2db5e)) * Update eslint jest configuration and versions. ([deea99c](https://github.com/launchdarkly/js-core/commit/deea99ca2fbb3865f2ce55a83b2cf12e0ae2db5e)) ### Bug Fixes * Add LDOptions.application name and versionName. ([#358](https://github.com/launchdarkly/js-core/issues/358)) ([cd75210](https://github.com/launchdarkly/js-core/commit/cd75210d20e3d989897ea42276792d934ac8c9c1)) * Add RN SDK offline support through ConnectionMode. ([#361](https://github.com/launchdarkly/js-core/issues/361)) ([d97ce82](https://github.com/launchdarkly/js-core/commit/d97ce82861438a1b79b93799a9d061cdfa1ab027)) * Implement anonymous context processing ([#350](https://github.com/launchdarkly/js-core/issues/350)) ([308100d](https://github.com/launchdarkly/js-core/commit/308100d095259635bfd8beca8a11aa8b43d7f29a)) * RN streamer connection in background and foreground. ([#360](https://github.com/launchdarkly/js-core/issues/360)) ([c69b768](https://github.com/launchdarkly/js-core/commit/c69b7686eed1971288adfbe527b4bf53ba5fe2b7)) ## [2.1.1](https://github.com/launchdarkly/js-core/compare/js-sdk-common-v2.1.0...js-sdk-common-v2.1.1) (2024-01-16) ### Bug Fixes * remove type modifiers on imports for better TS compatibility ([#346](https://github.com/launchdarkly/js-core/issues/346)) ([3506349](https://github.com/launchdarkly/js-core/commit/3506349512f2288ba9bc2b2bd79d6ed38fd3684c)) * Treat 413 HTTP status as recoverable for events. ([#348](https://github.com/launchdarkly/js-core/issues/348)) ([4a6d4c3](https://github.com/launchdarkly/js-core/commit/4a6d4c3cae25e4993a798d0fd315b51ef607d727)) ## [2.1.0](https://github.com/launchdarkly/js-core/compare/js-sdk-common-v2.0.0...js-sdk-common-v2.1.0) (2023-11-14) ### Features * edge sdks should send events to bulk/environment endpoint ([#256](https://github.com/launchdarkly/js-core/issues/256)) ([f45910f](https://github.com/launchdarkly/js-core/commit/f45910f171d434ca080bb6486331fbfbd2793985)) ## [2.0.0](https://github.com/launchdarkly/js-core/compare/js-sdk-common-v1.1.0...js-sdk-common-v2.0.0) (2023-10-16) ### ⚠ BREAKING CHANGES * Implement Migrations. Refactor for client SDKs. ([#293](https://github.com/launchdarkly/js-core/issues/293)) ### Features * Implement Migrations. Refactor for client SDKs. ([#293](https://github.com/launchdarkly/js-core/issues/293)) ([c66aa6e](https://github.com/launchdarkly/js-core/commit/c66aa6ea0d12e1e4e565cb8378d367c31fab9c1b)) ## [1.1.0](https://github.com/launchdarkly/js-core/compare/js-sdk-common-v1.0.3...js-sdk-common-v1.1.0) (2023-08-14) ### Features * Allow specifying the user agent per-sdk implementation. ([#226](https://github.com/launchdarkly/js-core/issues/226)) ([e57716f](https://github.com/launchdarkly/js-core/commit/e57716f3f6f0ba8568e32b0937903ca46e5470ad)) ## [1.0.3](https://github.com/launchdarkly/js-core/compare/js-sdk-common-v1.0.2...js-sdk-common-v1.0.3) (2023-08-10) ### Bug Fixes * Switch to es2017 target to ensure native async/await. ([a83e4e6](https://github.com/launchdarkly/js-core/commit/a83e4e62d04c66105a1b0e8893640a7ca2d641e4)) ## [1.0.2](https://github.com/launchdarkly/js-core/compare/js-sdk-common-v1.0.1...js-sdk-common-v1.0.2) (2023-06-13) ### Bug Fixes * Correctly handle excluded big segments. ([#160](https://github.com/launchdarkly/js-core/issues/160)) ([e9cb45a](https://github.com/launchdarkly/js-core/commit/e9cb45a14ed6d3f931680dab0feb4b5cef350592)) ## [1.0.1](https://github.com/launchdarkly/js-core/compare/js-sdk-common-v1.0.0...js-sdk-common-v1.0.1) (2023-04-27) ### Bug Fixes * add licence and fix missing package.json fields. ([c586398](https://github.com/launchdarkly/js-core/commit/c5863980c5bf4ee2a7590dfc4f7c575045d669b0)) * Ensure top level commands work correctly ([#105](https://github.com/launchdarkly/js-core/issues/105)) ([762571f](https://github.com/launchdarkly/js-core/commit/762571ff851558d229e4d29ba40a9c16b89f2a8d)) * remove beta text from cloudflare sdk readme. ([c586398](https://github.com/launchdarkly/js-core/commit/c5863980c5bf4ee2a7590dfc4f7c575045d669b0)) ## [1.0.0](https://github.com/launchdarkly/js-core/compare/js-sdk-common-v0.3.0...js-sdk-common-v1.0.0) (2023-04-26) ### Features * initial major release ([#101](https://github.com/launchdarkly/js-core/issues/101)) ([9883675](https://github.com/launchdarkly/js-core/commit/98836758d1998f208a1e13a68955611e0b10a8ce)) ## [0.3.0](https://github.com/launchdarkly/js-core/compare/js-sdk-common-v0.2.0...js-sdk-common-v0.3.0) (2023-04-19) ### Features * create sdk-server-edge package ([#83](https://github.com/launchdarkly/js-core/issues/83)) ([0578190](https://github.com/launchdarkly/js-core/commit/0578190123e2712b50774ca3087c7577ef2b9eb2)) ## [0.2.0](https://github.com/launchdarkly/js-core/compare/js-sdk-common-v0.1.0...js-sdk-common-v0.2.0) (2023-03-16) ### Features * Update packaging to include only needed files. ([06b2f28](https://github.com/launchdarkly/js-core/commit/06b2f28c85ba9e8610f88cb234546403e534fa77)) ## 0.1.0 (2023-03-15) Initial prerelease version.