# mutation-testing-elements changelog > mutation-testing-elements release notes. - Vendor: mutation-testing-elements - Category: Developer Tools - Official site: https://github.com/stryker-mutator/mutation-testing-elements/tree/master/packages/metrics#readme - Tracked by: What's New (https://whatsnew.fyi/product/mutation-testing-elements) - Harvested from: GitHub (stryker-mutator/mutation-testing-elements) - Entries below: 10 (newest first) What's New is an index, not a publisher: every entry below links to the vendor's own release notes, which are the authoritative source. Entries are labelled where they are hand-curated sample data, pre-releases, or drawn from a secondary source such as a developer blog. ## Releases ### v3.9.0 - Date: 2026-07-27 - Version: v3.9.0 - Original notes: https://github.com/stryker-mutator/mutation-testing-elements/releases/tag/v3.9.0 - Permalink: https://whatsnew.fyi/product/mutation-testing-elements/releases/v3.9.0 #### [3.9.0](https://github.com/stryker-mutator/mutation-testing-elements/compare/v3.8.4...v3.9.0) (2026-07-27) ###### Bug Fixes * **deps:** update dependency eslint-plugin-simple-import-sort to v14 ([#4271](https://github.com/stryker-mutator/mutation-testing-elements/issues/4271)) ([25c52f5](https://github.com/stryker-mutator/mutation-testing-elements/commit/25c52f5298ee03f5de1c287a9710057440292c63)) ###### Features * **elements:** render ANSI escape codes in the mutant drawer ([#4264](https://github.com/stryker-mutator/mutation-testing-elements/issues/4264)) ([0c93866](https://github.com/stryker-mutator/mutation-testing-elements/commit/0c93866a1a6106aba43affc9c220e259ec6347d4)), closes [#2925](https://github.com/stryker-mutator/mutation-testing-elements/issues/2925) ### v3.8.4 - Date: 2026-07-06 - Version: v3.8.4 - Original notes: https://github.com/stryker-mutator/mutation-testing-elements/releases/tag/v3.8.4 - Permalink: https://whatsnew.fyi/product/mutation-testing-elements/releases/v3.8.4 ##### [3.8.4](https://github.com/stryker-mutator/mutation-testing-elements/compare/v3.8.3...v3.8.4) (2026-07-06) ###### Performance Improvements * multiple performance improvements to rendering and calculating scores ([#4246](https://github.com/stryker-mutator/mutation-testing-elements/issues/4246)) ([083117c](https://github.com/stryker-mutator/mutation-testing-elements/commit/083117c6ca047b114683ae86cf05b13fac9af9c2)) ### v3.8.3 - Date: 2026-06-05 - Version: v3.8.3 - Original notes: https://github.com/stryker-mutator/mutation-testing-elements/releases/tag/v3.8.3 - Permalink: https://whatsnew.fyi/product/mutation-testing-elements/releases/v3.8.3 ##### [3.8.3](https://github.com/stryker-mutator/mutation-testing-elements/compare/v3.8.2...v3.8.3) (2026-06-05) **Note:** Version bump only for package root ### v3.8.0 - Date: 2026-06-05 - Version: v3.8.0 - Original notes: https://github.com/stryker-mutator/mutation-testing-elements/releases/tag/v3.8.0 - Permalink: https://whatsnew.fyi/product/mutation-testing-elements/releases/v3.8.0 #### [3.8.0](https://github.com/stryker-mutator/mutation-testing-elements/compare/v3.7.3...v3.8.0) (2026-06-05) ###### Bug Fixes * **deps:** update dependency eslint-plugin-simple-import-sort to v13 ([#4142](https://github.com/stryker-mutator/mutation-testing-elements/issues/4142)) ([0c59422](https://github.com/stryker-mutator/mutation-testing-elements/commit/0c5942285074349c784e80e798798f3b2e49f57f)) ###### Features * **metrics-scala:** Add Cats type class instances module ([#4199](https://github.com/stryker-mutator/mutation-testing-elements/issues/4199)) ([da2a4d1](https://github.com/stryker-mutator/mutation-testing-elements/commit/da2a4d186b9a9bbd9708c13d1f9174c5017b8697)) * **tests:** target Node 22-24 and Java 25 ([#4167](https://github.com/stryker-mutator/mutation-testing-elements/issues/4167)) ([beccdfe](https://github.com/stryker-mutator/mutation-testing-elements/commit/beccdfeebb31333659cee03e4053593903174057)) ### v3.7.3 - Date: 2026-03-15 - Version: v3.7.3 - Original notes: https://github.com/stryker-mutator/mutation-testing-elements/releases/tag/v3.7.3 - Permalink: https://whatsnew.fyi/product/mutation-testing-elements/releases/v3.7.3 ##### [3.7.3](https://github.com/stryker-mutator/mutation-testing-elements/compare/v3.7.2...v3.7.3) (2026-03-15) ###### Bug Fixes * **elements:** compatibility with `History` routers ([#4099](https://github.com/stryker-mutator/mutation-testing-elements/issues/4099)) ([6eb2a76](https://github.com/stryker-mutator/mutation-testing-elements/commit/6eb2a76a345bad077b1f1599ae55ba378df4a691)) ### v3.7.2 - Date: 2026-02-13 - Version: v3.7.2 - Original notes: https://github.com/stryker-mutator/mutation-testing-elements/releases/tag/v3.7.2 - Permalink: https://whatsnew.fyi/product/mutation-testing-elements/releases/v3.7.2 ##### [3.7.2](https://github.com/stryker-mutator/mutation-testing-elements/compare/v3.7.1...v3.7.2) (2026-02-13) ###### Bug Fixes * **metrics:** fix groupBy function ([#4060](https://github.com/stryker-mutator/mutation-testing-elements/issues/4060)) ([e7a089a](https://github.com/stryker-mutator/mutation-testing-elements/commit/e7a089a81b6b461481dcf454115053a3de32f74f)), closes [#4059](https://github.com/stryker-mutator/mutation-testing-elements/issues/4059) ### v3.7.1 - Date: 2025-11-24 - Version: v3.7.1 - Original notes: https://github.com/stryker-mutator/mutation-testing-elements/releases/tag/v3.7.1 - Permalink: https://whatsnew.fyi/product/mutation-testing-elements/releases/v3.7.1 ##### [3.7.1](https://github.com/stryker-mutator/mutation-testing-elements/compare/v3.7.0...v3.7.1) (2025-11-24) ###### Bug Fixes * **metrics:** compatibility with Node 20 ([#3994](https://github.com/stryker-mutator/mutation-testing-elements/issues/3994)) ([d73703c](https://github.com/stryker-mutator/mutation-testing-elements/commit/d73703cfe7676047b45b75ad2fb457d508abd859)) ### v3.7.0 - Date: 2025-11-21 - Version: v3.7.0 - Original notes: https://github.com/stryker-mutator/mutation-testing-elements/releases/tag/v3.7.0 - Permalink: https://whatsnew.fyi/product/mutation-testing-elements/releases/v3.7.0 #### [3.7.0](https://github.com/stryker-mutator/mutation-testing-elements/compare/v3.6.0...v3.7.0) (2025-11-21) ###### Bug Fixes * **elements:** respect reduced motion preferences ([#3980](https://github.com/stryker-mutator/mutation-testing-elements/issues/3980)) ([98a1c4c](https://github.com/stryker-mutator/mutation-testing-elements/commit/98a1c4ce7f4271169043f4f95c0136f3d1fc4d38)) ###### Features * **elements:** refresh some icons and colours ([#3978](https://github.com/stryker-mutator/mutation-testing-elements/issues/3978)) ([5cf987e](https://github.com/stryker-mutator/mutation-testing-elements/commit/5cf987e4012fd4367d492a61551af41fe9446ac7)) ### v3.6.0 - Date: 2025-08-13 - Version: v3.6.0 - Original notes: https://github.com/stryker-mutator/mutation-testing-elements/releases/tag/v3.6.0 - Permalink: https://whatsnew.fyi/product/mutation-testing-elements/releases/v3.6.0 #### [3.6.0](https://github.com/stryker-mutator/mutation-testing-elements/compare/v3.5.4...v3.6.0) (2025-08-13) ###### Features * **elements:** python code highlighting support ([#3860](https://github.com/stryker-mutator/mutation-testing-elements/issues/3860)) ([88f7292](https://github.com/stryker-mutator/mutation-testing-elements/commit/88f72923f7e2eb6388b5ade0c79993946d15ddaf)) ### v3.5.4 - Date: 2025-05-27 - Version: v3.5.4 - Original notes: https://github.com/stryker-mutator/mutation-testing-elements/releases/tag/v3.5.4 - Permalink: https://whatsnew.fyi/product/mutation-testing-elements/releases/v3.5.4 ##### [3.5.4](https://github.com/stryker-mutator/mutation-testing-elements/compare/v3.5.3...v3.5.4) (2025-05-27) ###### Bug Fixes * sbt sonatype publishing configuration ([4e0a8b5](https://github.com/stryker-mutator/mutation-testing-elements/commit/4e0a8b5268a3eda7f268c10de054e606ed5fd8ac)) * sbt sonatype publishing configuration ([#3780](https://github.com/stryker-mutator/mutation-testing-elements/issues/3780)) ([b0e18dd](https://github.com/stryker-mutator/mutation-testing-elements/commit/b0e18ddc88f1b41251606b0340c0930d344226d6))