fix(eslint-plugin): [no-unused-vars] fix false negative for type predicate parameter by Ju-MINJAE · Pull Request #12004 · typescript-eslint/typescript-eslint

Ju-MINJAE · 2026-01-28T13:45:56Z

PR Checklist

Addresses an existing open issue: fixes Bug: [no-unused-vars] Type predicate parameter not reported as unused when only used in type position #12003
That issue was marked as accepting prs
Steps in Contributing were taken

Overview

Fixed a false negative in no-unused-vars where parameters used only in a return type predicate were incorrectly considered "used".
Updated collectUnusedVariables to ignore references that occur exclusively within a TSTypePredicate node.

😵‍💫

…icate parameter (typescript-eslint#12003)

typescript-eslint · 2026-01-28T13:46:01Z

Thanks for the PR, @Ju-MINJAE!

typescript-eslint is a 100% community driven project, and we are incredibly grateful that you are contributing to that community.

The core maintainers work on this in their personal time, so please understand that it may not be possible for them to review your work immediately.

Thanks again!

🙏 Please, if you or your company is finding typescript-eslint valuable, help us sustain the project by sponsoring it transparently on https://opencollective.com/typescript-eslint.

netlify · 2026-01-28T13:46:03Z

✅ Deploy Preview for typescript-eslint ready!

Name	Link
🔨 Latest commit	`24135a4`
🔍 Latest deploy log	https://app.netlify.com/projects/typescript-eslint/deploys/69d5ac602c09f900086ebb84
😎 Deploy Preview	https://deploy-preview-12004--typescript-eslint.netlify.app
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.
Lighthouse	1 paths audited Performance: 98 (🟢 up 8 from production) Accessibility: 97 (no change from production) Best Practices: 92 (no change from production) SEO: 90 (no change from production) PWA: 80 (no change from production) View the detailed breakdown and full score reports

To edit notification comments on pull requests, go to your Netlify project configuration.

nx-cloud · 2026-01-28T13:47:27Z

View your CI Pipeline Execution ↗ for commit 24135a4

Command	Status	Duration	Result
`nx run-many -t lint`	✅ Succeeded	2m 7s	View ↗
`nx run-many -t typecheck`	✅ Succeeded	41s	View ↗
`nx test eslint-plugin-internal --coverage=false`	✅ Succeeded	3s	View ↗
`nx run types:build`	✅ Succeeded	1s	View ↗
`nx run generate-configs`	✅ Succeeded	7s	View ↗
`nx run integration-tests:test`	✅ Succeeded	4s	View ↗
`nx test typescript-estree --coverage=false`	✅ Succeeded	1s	View ↗
`nx run-many --target=build --parallel --exclude...`	✅ Succeeded	11s	View ↗
`Additional runs (34)`	✅ Succeeded	...	View ↗

☁️ Nx Cloud last updated this comment at 2026-04-08 01:22:07 UTC

codecov · 2026-01-28T13:55:42Z

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 86.71%. Comparing base (4fa6acd) to head (24135a4).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main   #12004   +/-   ##
=======================================
  Coverage   86.70%   86.71%           
=======================================
  Files         512      513    +1     
  Lines       16265    16270    +5     
  Branches     5058     5059    +1     
=======================================
+ Hits        14103    14108    +5     
  Misses       1474     1474           
  Partials      688      688

Flag	Coverage Δ
unittest	`86.71% <100.00%> (+<0.01%)`	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
packages/eslint-plugin/src/rules/no-unused-vars.ts	`95.38% <100.00%> (+0.01%)`	⬆️
...s/eslint-plugin/src/util/collectUnusedVariables.ts	`94.11% <ø> (ø)`
...-plugin/src/util/referenceContainsTypePredicate.ts	`100.00% <100.00%> (ø)`

🚀 New features to boost your workflow:

❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.

…ype predicates

JoshuaKGoldberg · 2026-03-07T14:22:27Z

👋 @Ju-MINJAE did you want to re-request review on this?

Ju-MINJAE · 2026-03-07T15:10:41Z

@JoshuaKGoldberg yes plz

JoshuaKGoldberg

👍 Great, I appreciate how this mirrors the existing code. Thanks!

I'll defer to @bradzacher for review if they have time, as they already reviewed.

bradzacher · 2026-04-08T01:16:54Z

thanks for this! Sorry it took so long to get back and review.

Ju-MINJAE · 2026-04-08T01:19:49Z

@bradzacher No problem at all, thank you!

@cseas

| datasource | package | from | to | | ---------- | -------------------------------- | ------ | ------ | | npm | @typescript-eslint/eslint-plugin | 8.56.0 | 8.58.2 | | npm | @typescript-eslint/parser | 8.56.0 | 8.58.2 | ## [v8.58.2](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/eslint-plugin/CHANGELOG.md#8582-2026-04-13) ##### 🩹 Fixes - **eslint-plugin:** \[no-unnecessary-condition] use assignability checks in checkTypePredicates ([#12147](typescript-eslint/typescript-eslint#12147)) - remove tsbuildinfo cache file from published packages ([#12187](typescript-eslint/typescript-eslint#12187)) ##### ❤️ Thank You - Abhijeet Singh [@cseas](https://github.com/cseas) - 송재욱 See [GitHub Releases](https://github.com/typescript-eslint/typescript-eslint/releases/tag/v8.58.2) for more information. You can read about our [versioning strategy](https://typescript-eslint.io/users/versioning) and [releases](https://typescript-eslint.io/users/releases) on our website. ## [v8.58.1](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/eslint-plugin/CHANGELOG.md#8581-2026-04-08) ##### 🩹 Fixes - **eslint-plugin:** \[no-unused-vars] fix false negative for type predicate parameter ([#12004](typescript-eslint/typescript-eslint#12004)) ##### ❤️ Thank You - MinJae [@Ju-MINJAE](https://github.com/Ju-MINJAE) See [GitHub Releases](https://github.com/typescript-eslint/typescript-eslint/releases/tag/v8.58.1) for more information. You can read about our [versioning strategy](https://typescript-eslint.io/users/versioning) and [releases](https://typescript-eslint.io/users/releases) on our website. ## [v8.58.0](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/eslint-plugin/CHANGELOG.md#8580-2026-03-30) ##### 🚀 Features - support TypeScript 6 ([#12124](typescript-eslint/typescript-eslint#12124)) ##### 🩹 Fixes - **eslint-plugin:** \[prefer-regexp-exec] avoid fixing unknown RegExp flags ([#12161](typescript-eslint/typescript-eslint#12161)) - **eslint-plugin:** \[no-extraneous-class] handle index signatures ([#12142](typescript-eslint/typescript-eslint#12142)) - **eslint-plugin:** crash in `no-unnecessary-type-arguments` ([#12163](typescript-eslint/typescript-eslint#12163)) ##### ❤️ Thank You - ej shafran [@ej-shafran](https://github.com/ej-shafran) - Evyatar Daud [@StyleShit](https://github.com/StyleShit) - GG ZIBLAKING - milkboy2564 [@SeolJaeHyeok](https://github.com/SeolJaeHyeok) - teee32 [@teee32](https://github.com/teee32) See [GitHub Releases](https://github.com/typescript-eslint/typescript-eslint/releases/tag/v8.58.0) for more information. You can read about our [versioning strategy](https://typescript-eslint.io/users/versioning) and [releases](https://typescript-eslint.io/users/releases) on our website. ## [v8.57.2](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/eslint-plugin/CHANGELOG.md#8572-2026-03-23) ##### 🩹 Fixes - **eslint-plugin:** \[prefer-readonly-parameter-types] preserve type alias infomation ([#11954](typescript-eslint/typescript-eslint#11954)) - **eslint-plugin:** \[no-useless-default-assignment] skip reporting false positives for unresolved type parameters ([#12127](typescript-eslint/typescript-eslint#12127)) - **eslint-plugin:** \[no-unsafe-return] false positive on unwrapping generic ([#12125](typescript-eslint/typescript-eslint#12125)) - **eslint-plugin:** \[no-restricted-types] flag banned generics in extends or implements ([#12120](typescript-eslint/typescript-eslint#12120)) - **eslint-plugin:** \[array-type] ignore Array and ReadonlyArray without type arguments ([#11971](typescript-eslint/typescript-eslint#11971)) - **eslint-plugin:** \[prefer-optional-chain] remove dangling closing parenthesis ([#11865](typescript-eslint/typescript-eslint#11865)) ##### ❤️ Thank You - Kirk Waiblinger [@kirkwaiblinger](https://github.com/kirkwaiblinger) - Konv Suu - mdm317 - Newton Yuan [@NewtonYuan](https://github.com/NewtonYuan) - SungHyun627 [@SungHyun627](https://github.com/SungHyun627) - Tamashoo [@Tamashoo](https://github.com/Tamashoo) See [GitHub Releases](https://github.com/typescript-eslint/typescript-eslint/releases/tag/v8.57.2) for more information. You can read about our [versioning strategy](https://typescript-eslint.io/users/versioning) and [releases](https://typescript-eslint.io/users/releases) on our website. ## [v8.57.1](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/eslint-plugin/CHANGELOG.md#8571-2026-03-16) ##### 🩹 Fixes - **eslint-plugin:** \[prefer-optional-chain] no report for property on intersection type ([#12126](typescript-eslint/typescript-eslint#12126)) ##### ❤️ Thank You - Newton Yuan [@NewtonYuan](https://github.com/NewtonYuan) See [GitHub Releases](https://github.com/typescript-eslint/typescript-eslint/releases/tag/v8.57.1) for more information. You can read about our [versioning strategy](https://typescript-eslint.io/users/versioning) and [releases](https://typescript-eslint.io/users/releases) on our website. ## [v8.57.0](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/eslint-plugin/CHANGELOG.md#8570-2026-03-09) ##### 🚀 Features - **eslint-plugin:** \[no-unnecessary-condition] allow literal loop conditions in for/do loops ([#12080](typescript-eslint/typescript-eslint#12080)) ##### 🩹 Fixes - **eslint-plugin:** \[no-base-to-string] fix false positive for toString with overloads ([#12089](typescript-eslint/typescript-eslint#12089)) - **eslint-plugin:** \[prefer-promise-reject-errors] add allow `TypeOrValueSpecifier` to prefer-promise-reject-errors ([#12094](typescript-eslint/typescript-eslint#12094)) - **typescript-estree:** if the template literal is tagged and the text has an invalid escape, `cooked` will be `null` ([#11355](typescript-eslint/typescript-eslint#11355)) - **eslint-plugin:** guard against negative paramIndex in no-useless-default-assignment ([#12077](typescript-eslint/typescript-eslint#12077)) - **eslint-plugin:** handle statically analyzable computed keys in prefer-readonly ([#12079](typescript-eslint/typescript-eslint#12079)) - **eslint-plugin:** \[strict-void-return] false positives with overloads ([#12055](typescript-eslint/typescript-eslint#12055)) ##### ❤️ Thank You - Brad Zacher [@bradzacher](https://github.com/bradzacher) - Brian Schlenker [@bschlenk](https://github.com/bschlenk) - Evyatar Daud [@StyleShit](https://github.com/StyleShit) - James Henry [@JamesHenry](https://github.com/JamesHenry) - Josh Goldberg - Kirk Waiblinger [@kirkwaiblinger](https://github.com/kirkwaiblinger) - Moses Odutusin [@thebolarin](https://github.com/thebolarin) - Newton Yuan [@NewtonYuan](https://github.com/NewtonYuan) - SungHyun627 [@SungHyun627](https://github.com/SungHyun627) - Younsang Na [@nayounsang](https://github.com/nayounsang) See [GitHub Releases](https://github.com/typescript-eslint/typescript-eslint/releases/tag/v8.57.0) for more information. You can read about our [versioning strategy](https://typescript-eslint.io/users/versioning) and [releases](https://typescript-eslint.io/users/releases) on our website. ## [v8.56.1](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/eslint-plugin/CHANGELOG.md#8561-2026-02-23) This was a version bump only for eslint-plugin to align it with other projects, there were no code changes. See [GitHub Releases](https://github.com/typescript-eslint/typescript-eslint/releases/tag/v8.56.1) for more information. You can read about our [versioning strategy](https://typescript-eslint.io/users/versioning) and [releases](https://typescript-eslint.io/users/releases) on our website.

@cseas

| datasource | package | from | to | | ---------- | -------------------------------- | ------ | ------ | | npm | @typescript-eslint/eslint-plugin | 8.56.0 | 8.58.2 | | npm | @typescript-eslint/parser | 8.56.0 | 8.58.2 | ## [v8.58.2](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/eslint-plugin/CHANGELOG.md#8582-2026-04-13) ##### 🩹 Fixes - **eslint-plugin:** \[no-unnecessary-condition] use assignability checks in checkTypePredicates ([#12147](typescript-eslint/typescript-eslint#12147)) - remove tsbuildinfo cache file from published packages ([#12187](typescript-eslint/typescript-eslint#12187)) ##### ❤️ Thank You - Abhijeet Singh [@cseas](https://github.com/cseas) - 송재욱 See [GitHub Releases](https://github.com/typescript-eslint/typescript-eslint/releases/tag/v8.58.2) for more information. You can read about our [versioning strategy](https://typescript-eslint.io/users/versioning) and [releases](https://typescript-eslint.io/users/releases) on our website. ## [v8.58.1](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/eslint-plugin/CHANGELOG.md#8581-2026-04-08) ##### 🩹 Fixes - **eslint-plugin:** \[no-unused-vars] fix false negative for type predicate parameter ([#12004](typescript-eslint/typescript-eslint#12004)) ##### ❤️ Thank You - MinJae [@Ju-MINJAE](https://github.com/Ju-MINJAE) See [GitHub Releases](https://github.com/typescript-eslint/typescript-eslint/releases/tag/v8.58.1) for more information. You can read about our [versioning strategy](https://typescript-eslint.io/users/versioning) and [releases](https://typescript-eslint.io/users/releases) on our website. ## [v8.58.0](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/eslint-plugin/CHANGELOG.md#8580-2026-03-30) ##### 🚀 Features - support TypeScript 6 ([#12124](typescript-eslint/typescript-eslint#12124)) ##### 🩹 Fixes - **eslint-plugin:** \[prefer-regexp-exec] avoid fixing unknown RegExp flags ([#12161](typescript-eslint/typescript-eslint#12161)) - **eslint-plugin:** \[no-extraneous-class] handle index signatures ([#12142](typescript-eslint/typescript-eslint#12142)) - **eslint-plugin:** crash in `no-unnecessary-type-arguments` ([#12163](typescript-eslint/typescript-eslint#12163)) ##### ❤️ Thank You - ej shafran [@ej-shafran](https://github.com/ej-shafran) - Evyatar Daud [@StyleShit](https://github.com/StyleShit) - GG ZIBLAKING - milkboy2564 [@SeolJaeHyeok](https://github.com/SeolJaeHyeok) - teee32 [@teee32](https://github.com/teee32) See [GitHub Releases](https://github.com/typescript-eslint/typescript-eslint/releases/tag/v8.58.0) for more information. You can read about our [versioning strategy](https://typescript-eslint.io/users/versioning) and [releases](https://typescript-eslint.io/users/releases) on our website. ## [v8.57.2](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/eslint-plugin/CHANGELOG.md#8572-2026-03-23) ##### 🩹 Fixes - **eslint-plugin:** \[prefer-readonly-parameter-types] preserve type alias infomation ([#11954](typescript-eslint/typescript-eslint#11954)) - **eslint-plugin:** \[no-useless-default-assignment] skip reporting false positives for unresolved type parameters ([#12127](typescript-eslint/typescript-eslint#12127)) - **eslint-plugin:** \[no-unsafe-return] false positive on unwrapping generic ([#12125](typescript-eslint/typescript-eslint#12125)) - **eslint-plugin:** \[no-restricted-types] flag banned generics in extends or implements ([#12120](typescript-eslint/typescript-eslint#12120)) - **eslint-plugin:** \[array-type] ignore Array and ReadonlyArray without type arguments ([#11971](typescript-eslint/typescript-eslint#11971)) - **eslint-plugin:** \[prefer-optional-chain] remove dangling closing parenthesis ([#11865](typescript-eslint/typescript-eslint#11865)) ##### ❤️ Thank You - Kirk Waiblinger [@kirkwaiblinger](https://github.com/kirkwaiblinger) - Konv Suu - mdm317 - Newton Yuan [@NewtonYuan](https://github.com/NewtonYuan) - SungHyun627 [@SungHyun627](https://github.com/SungHyun627) - Tamashoo [@Tamashoo](https://github.com/Tamashoo) See [GitHub Releases](https://github.com/typescript-eslint/typescript-eslint/releases/tag/v8.57.2) for more information. You can read about our [versioning strategy](https://typescript-eslint.io/users/versioning) and [releases](https://typescript-eslint.io/users/releases) on our website. ## [v8.57.1](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/eslint-plugin/CHANGELOG.md#8571-2026-03-16) ##### 🩹 Fixes - **eslint-plugin:** \[prefer-optional-chain] no report for property on intersection type ([#12126](typescript-eslint/typescript-eslint#12126)) ##### ❤️ Thank You - Newton Yuan [@NewtonYuan](https://github.com/NewtonYuan) See [GitHub Releases](https://github.com/typescript-eslint/typescript-eslint/releases/tag/v8.57.1) for more information. You can read about our [versioning strategy](https://typescript-eslint.io/users/versioning) and [releases](https://typescript-eslint.io/users/releases) on our website. ## [v8.57.0](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/eslint-plugin/CHANGELOG.md#8570-2026-03-09) ##### 🚀 Features - **eslint-plugin:** \[no-unnecessary-condition] allow literal loop conditions in for/do loops ([#12080](typescript-eslint/typescript-eslint#12080)) ##### 🩹 Fixes - **eslint-plugin:** \[no-base-to-string] fix false positive for toString with overloads ([#12089](typescript-eslint/typescript-eslint#12089)) - **eslint-plugin:** \[prefer-promise-reject-errors] add allow `TypeOrValueSpecifier` to prefer-promise-reject-errors ([#12094](typescript-eslint/typescript-eslint#12094)) - **typescript-estree:** if the template literal is tagged and the text has an invalid escape, `cooked` will be `null` ([#11355](typescript-eslint/typescript-eslint#11355)) - **eslint-plugin:** guard against negative paramIndex in no-useless-default-assignment ([#12077](typescript-eslint/typescript-eslint#12077)) - **eslint-plugin:** handle statically analyzable computed keys in prefer-readonly ([#12079](typescript-eslint/typescript-eslint#12079)) - **eslint-plugin:** \[strict-void-return] false positives with overloads ([#12055](typescript-eslint/typescript-eslint#12055)) ##### ❤️ Thank You - Brad Zacher [@bradzacher](https://github.com/bradzacher) - Brian Schlenker [@bschlenk](https://github.com/bschlenk) - Evyatar Daud [@StyleShit](https://github.com/StyleShit) - James Henry [@JamesHenry](https://github.com/JamesHenry) - Josh Goldberg - Kirk Waiblinger [@kirkwaiblinger](https://github.com/kirkwaiblinger) - Moses Odutusin [@thebolarin](https://github.com/thebolarin) - Newton Yuan [@NewtonYuan](https://github.com/NewtonYuan) - SungHyun627 [@SungHyun627](https://github.com/SungHyun627) - Younsang Na [@nayounsang](https://github.com/nayounsang) See [GitHub Releases](https://github.com/typescript-eslint/typescript-eslint/releases/tag/v8.57.0) for more information. You can read about our [versioning strategy](https://typescript-eslint.io/users/versioning) and [releases](https://typescript-eslint.io/users/releases) on our website. ## [v8.56.1](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/eslint-plugin/CHANGELOG.md#8561-2026-02-23) This was a version bump only for eslint-plugin to align it with other projects, there were no code changes. See [GitHub Releases](https://github.com/typescript-eslint/typescript-eslint/releases/tag/v8.56.1) for more information. You can read about our [versioning strategy](https://typescript-eslint.io/users/versioning) and [releases](https://typescript-eslint.io/users/releases) on our website.

@anasm266

| datasource | package | from | to | | ---------- | -------------------------------- | ------ | ------ | | npm | @typescript-eslint/eslint-plugin | 8.56.0 | 8.59.1 | | npm | @typescript-eslint/parser | 8.56.0 | 8.59.1 | ## [v8.59.1](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/eslint-plugin/CHANGELOG.md#8591-2026-04-27) ##### 🩹 Fixes - **eslint-plugin:** \[no-unnecessary-condition] treat void as nullish in no-unnecessary-condition ([#12241](typescript-eslint/typescript-eslint#12241)) - **eslint-plugin:** \[no-unnecessary-type-arguments] handle instantiation expressions ([#12220](typescript-eslint/typescript-eslint#12220)) - **eslint-plugin:** \[no-unnecessary-type-assertion] avoid false positive in logical assignment assertions ([#12278](typescript-eslint/typescript-eslint#12278)) - **eslint-plugin:** \[no-unnecessary-type-assertion] preserve phantom type arguments in generic inference ([#12269](typescript-eslint/typescript-eslint#12269)) - **eslint-plugin:** \[no-unnecessary-type-assertion] preserve index signatures in undefined unions ([#12257](typescript-eslint/typescript-eslint#12257)) - **eslint-plugin:** \[no-unnecessary-type-assertion] fix crash "TypeError: checker.getTypeArguments is not a function" ([#12246](typescript-eslint/typescript-eslint#12246)) ##### ❤️ Thank You - anasm266 [@anasm266](https://github.com/anasm266) - Anshika Jain [@Anshikakalpana](https://github.com/Anshikakalpana) - Ulrich Stark - yugo innami [@nami8824](https://github.com/nami8824) See [GitHub Releases](https://github.com/typescript-eslint/typescript-eslint/releases/tag/v8.59.1) for more information. You can read about our [versioning strategy](https://typescript-eslint.io/users/versioning) and [releases](https://typescript-eslint.io/users/releases) on our website. ## [v8.59.0](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/eslint-plugin/CHANGELOG.md#8590-2026-04-20) ##### 🚀 Features - **eslint-plugin:** \[no-unnecessary-type-assertion] report more cases based on assignability ([#11789](typescript-eslint/typescript-eslint#11789)) ##### ❤️ Thank You - Ulrich Stark See [GitHub Releases](https://github.com/typescript-eslint/typescript-eslint/releases/tag/v8.59.0) for more information. You can read about our [versioning strategy](https://typescript-eslint.io/users/versioning) and [releases](https://typescript-eslint.io/users/releases) on our website. ## [v8.58.2](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/eslint-plugin/CHANGELOG.md#8582-2026-04-13) ##### 🩹 Fixes - **eslint-plugin:** \[no-unnecessary-condition] use assignability checks in checkTypePredicates ([#12147](typescript-eslint/typescript-eslint#12147)) - remove tsbuildinfo cache file from published packages ([#12187](typescript-eslint/typescript-eslint#12187)) ##### ❤️ Thank You - Abhijeet Singh [@cseas](https://github.com/cseas) - 송재욱 See [GitHub Releases](https://github.com/typescript-eslint/typescript-eslint/releases/tag/v8.58.2) for more information. You can read about our [versioning strategy](https://typescript-eslint.io/users/versioning) and [releases](https://typescript-eslint.io/users/releases) on our website. ## [v8.58.1](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/eslint-plugin/CHANGELOG.md#8581-2026-04-08) ##### 🩹 Fixes - **eslint-plugin:** \[no-unused-vars] fix false negative for type predicate parameter ([#12004](typescript-eslint/typescript-eslint#12004)) ##### ❤️ Thank You - MinJae [@Ju-MINJAE](https://github.com/Ju-MINJAE) See [GitHub Releases](https://github.com/typescript-eslint/typescript-eslint/releases/tag/v8.58.1) for more information. You can read about our [versioning strategy](https://typescript-eslint.io/users/versioning) and [releases](https://typescript-eslint.io/users/releases) on our website. ## [v8.58.0](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/eslint-plugin/CHANGELOG.md#8580-2026-03-30) ##### 🚀 Features - support TypeScript 6 ([#12124](typescript-eslint/typescript-eslint#12124)) ##### 🩹 Fixes - **eslint-plugin:** \[prefer-regexp-exec] avoid fixing unknown RegExp flags ([#12161](typescript-eslint/typescript-eslint#12161)) - **eslint-plugin:** \[no-extraneous-class] handle index signatures ([#12142](typescript-eslint/typescript-eslint#12142)) - **eslint-plugin:** crash in `no-unnecessary-type-arguments` ([#12163](typescript-eslint/typescript-eslint#12163)) ##### ❤️ Thank You - ej shafran [@ej-shafran](https://github.com/ej-shafran) - Evyatar Daud [@StyleShit](https://github.com/StyleShit) - GG ZIBLAKING - milkboy2564 [@SeolJaeHyeok](https://github.com/SeolJaeHyeok) - teee32 [@teee32](https://github.com/teee32) See [GitHub Releases](https://github.com/typescript-eslint/typescript-eslint/releases/tag/v8.58.0) for more information. You can read about our [versioning strategy](https://typescript-eslint.io/users/versioning) and [releases](https://typescript-eslint.io/users/releases) on our website. ## [v8.57.2](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/eslint-plugin/CHANGELOG.md#8572-2026-03-23) ##### 🩹 Fixes - **eslint-plugin:** \[prefer-readonly-parameter-types] preserve type alias infomation ([#11954](typescript-eslint/typescript-eslint#11954)) - **eslint-plugin:** \[no-useless-default-assignment] skip reporting false positives for unresolved type parameters ([#12127](typescript-eslint/typescript-eslint#12127)) - **eslint-plugin:** \[no-unsafe-return] false positive on unwrapping generic ([#12125](typescript-eslint/typescript-eslint#12125)) - **eslint-plugin:** \[no-restricted-types] flag banned generics in extends or implements ([#12120](typescript-eslint/typescript-eslint#12120)) - **eslint-plugin:** \[array-type] ignore Array and ReadonlyArray without type arguments ([#11971](typescript-eslint/typescript-eslint#11971)) - **eslint-plugin:** \[prefer-optional-chain] remove dangling closing parenthesis ([#11865](typescript-eslint/typescript-eslint#11865)) ##### ❤️ Thank You - Kirk Waiblinger [@kirkwaiblinger](https://github.com/kirkwaiblinger) - Konv Suu - mdm317 - Newton Yuan [@NewtonYuan](https://github.com/NewtonYuan) - SungHyun627 [@SungHyun627](https://github.com/SungHyun627) - Tamashoo [@Tamashoo](https://github.com/Tamashoo) See [GitHub Releases](https://github.com/typescript-eslint/typescript-eslint/releases/tag/v8.57.2) for more information. You can read about our [versioning strategy](https://typescript-eslint.io/users/versioning) and [releases](https://typescript-eslint.io/users/releases) on our website. ## [v8.57.1](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/eslint-plugin/CHANGELOG.md#8571-2026-03-16) ##### 🩹 Fixes - **eslint-plugin:** \[prefer-optional-chain] no report for property on intersection type ([#12126](typescript-eslint/typescript-eslint#12126)) ##### ❤️ Thank You - Newton Yuan [@NewtonYuan](https://github.com/NewtonYuan) See [GitHub Releases](https://github.com/typescript-eslint/typescript-eslint/releases/tag/v8.57.1) for more information. You can read about our [versioning strategy](https://typescript-eslint.io/users/versioning) and [releases](https://typescript-eslint.io/users/releases) on our website. ## [v8.57.0](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/eslint-plugin/CHANGELOG.md#8570-2026-03-09) ##### 🚀 Features - **eslint-plugin:** \[no-unnecessary-condition] allow literal loop conditions in for/do loops ([#12080](typescript-eslint/typescript-eslint#12080)) ##### 🩹 Fixes - **eslint-plugin:** \[no-base-to-string] fix false positive for toString with overloads ([#12089](typescript-eslint/typescript-eslint#12089)) - **eslint-plugin:** \[prefer-promise-reject-errors] add allow `TypeOrValueSpecifier` to prefer-promise-reject-errors ([#12094](typescript-eslint/typescript-eslint#12094)) - **typescript-estree:** if the template literal is tagged and the text has an invalid escape, `cooked` will be `null` ([#11355](typescript-eslint/typescript-eslint#11355)) - **eslint-plugin:** guard against negative paramIndex in no-useless-default-assignment ([#12077](typescript-eslint/typescript-eslint#12077)) - **eslint-plugin:** handle statically analyzable computed keys in prefer-readonly ([#12079](typescript-eslint/typescript-eslint#12079)) - **eslint-plugin:** \[strict-void-return] false positives with overloads ([#12055](typescript-eslint/typescript-eslint#12055)) ##### ❤️ Thank You - Brad Zacher [@bradzacher](https://github.com/bradzacher) - Brian Schlenker [@bschlenk](https://github.com/bschlenk) - Evyatar Daud [@StyleShit](https://github.com/StyleShit) - James Henry [@JamesHenry](https://github.com/JamesHenry) - Josh Goldberg - Kirk Waiblinger [@kirkwaiblinger](https://github.com/kirkwaiblinger) - Moses Odutusin [@thebolarin](https://github.com/thebolarin) - Newton Yuan [@NewtonYuan](https://github.com/NewtonYuan) - SungHyun627 [@SungHyun627](https://github.com/SungHyun627) - Younsang Na [@nayounsang](https://github.com/nayounsang) See [GitHub Releases](https://github.com/typescript-eslint/typescript-eslint/releases/tag/v8.57.0) for more information. You can read about our [versioning strategy](https://typescript-eslint.io/users/versioning) and [releases](https://typescript-eslint.io/users/releases) on our website. ## [v8.56.1](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/eslint-plugin/CHANGELOG.md#8561-2026-02-23) This was a version bump only for eslint-plugin to align it with other projects, there were no code changes. See [GitHub Releases](https://github.com/typescript-eslint/typescript-eslint/releases/tag/v8.56.1) for more information. You can read about our [versioning strategy](https://typescript-eslint.io/users/versioning) and [releases](https://typescript-eslint.io/users/releases) on our website.

@anasm266

| datasource | package | from | to | | ---------- | -------------------------------- | ------ | ------ | | npm | @typescript-eslint/eslint-plugin | 8.56.0 | 8.59.1 | | npm | @typescript-eslint/parser | 8.56.0 | 8.59.1 | ## [v8.59.1](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/eslint-plugin/CHANGELOG.md#8591-2026-04-27) ##### 🩹 Fixes - **eslint-plugin:** \[no-unnecessary-condition] treat void as nullish in no-unnecessary-condition ([#12241](typescript-eslint/typescript-eslint#12241)) - **eslint-plugin:** \[no-unnecessary-type-arguments] handle instantiation expressions ([#12220](typescript-eslint/typescript-eslint#12220)) - **eslint-plugin:** \[no-unnecessary-type-assertion] avoid false positive in logical assignment assertions ([#12278](typescript-eslint/typescript-eslint#12278)) - **eslint-plugin:** \[no-unnecessary-type-assertion] preserve phantom type arguments in generic inference ([#12269](typescript-eslint/typescript-eslint#12269)) - **eslint-plugin:** \[no-unnecessary-type-assertion] preserve index signatures in undefined unions ([#12257](typescript-eslint/typescript-eslint#12257)) - **eslint-plugin:** \[no-unnecessary-type-assertion] fix crash "TypeError: checker.getTypeArguments is not a function" ([#12246](typescript-eslint/typescript-eslint#12246)) ##### ❤️ Thank You - anasm266 [@anasm266](https://github.com/anasm266) - Anshika Jain [@Anshikakalpana](https://github.com/Anshikakalpana) - Ulrich Stark - yugo innami [@nami8824](https://github.com/nami8824) See [GitHub Releases](https://github.com/typescript-eslint/typescript-eslint/releases/tag/v8.59.1) for more information. You can read about our [versioning strategy](https://typescript-eslint.io/users/versioning) and [releases](https://typescript-eslint.io/users/releases) on our website. ## [v8.59.0](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/eslint-plugin/CHANGELOG.md#8590-2026-04-20) ##### 🚀 Features - **eslint-plugin:** \[no-unnecessary-type-assertion] report more cases based on assignability ([#11789](typescript-eslint/typescript-eslint#11789)) ##### ❤️ Thank You - Ulrich Stark See [GitHub Releases](https://github.com/typescript-eslint/typescript-eslint/releases/tag/v8.59.0) for more information. You can read about our [versioning strategy](https://typescript-eslint.io/users/versioning) and [releases](https://typescript-eslint.io/users/releases) on our website. ## [v8.58.2](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/eslint-plugin/CHANGELOG.md#8582-2026-04-13) ##### 🩹 Fixes - **eslint-plugin:** \[no-unnecessary-condition] use assignability checks in checkTypePredicates ([#12147](typescript-eslint/typescript-eslint#12147)) - remove tsbuildinfo cache file from published packages ([#12187](typescript-eslint/typescript-eslint#12187)) ##### ❤️ Thank You - Abhijeet Singh [@cseas](https://github.com/cseas) - 송재욱 See [GitHub Releases](https://github.com/typescript-eslint/typescript-eslint/releases/tag/v8.58.2) for more information. You can read about our [versioning strategy](https://typescript-eslint.io/users/versioning) and [releases](https://typescript-eslint.io/users/releases) on our website. ## [v8.58.1](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/eslint-plugin/CHANGELOG.md#8581-2026-04-08) ##### 🩹 Fixes - **eslint-plugin:** \[no-unused-vars] fix false negative for type predicate parameter ([#12004](typescript-eslint/typescript-eslint#12004)) ##### ❤️ Thank You - MinJae [@Ju-MINJAE](https://github.com/Ju-MINJAE) See [GitHub Releases](https://github.com/typescript-eslint/typescript-eslint/releases/tag/v8.58.1) for more information. You can read about our [versioning strategy](https://typescript-eslint.io/users/versioning) and [releases](https://typescript-eslint.io/users/releases) on our website. ## [v8.58.0](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/eslint-plugin/CHANGELOG.md#8580-2026-03-30) ##### 🚀 Features - support TypeScript 6 ([#12124](typescript-eslint/typescript-eslint#12124)) ##### 🩹 Fixes - **eslint-plugin:** \[prefer-regexp-exec] avoid fixing unknown RegExp flags ([#12161](typescript-eslint/typescript-eslint#12161)) - **eslint-plugin:** \[no-extraneous-class] handle index signatures ([#12142](typescript-eslint/typescript-eslint#12142)) - **eslint-plugin:** crash in `no-unnecessary-type-arguments` ([#12163](typescript-eslint/typescript-eslint#12163)) ##### ❤️ Thank You - ej shafran [@ej-shafran](https://github.com/ej-shafran) - Evyatar Daud [@StyleShit](https://github.com/StyleShit) - GG ZIBLAKING - milkboy2564 [@SeolJaeHyeok](https://github.com/SeolJaeHyeok) - teee32 [@teee32](https://github.com/teee32) See [GitHub Releases](https://github.com/typescript-eslint/typescript-eslint/releases/tag/v8.58.0) for more information. You can read about our [versioning strategy](https://typescript-eslint.io/users/versioning) and [releases](https://typescript-eslint.io/users/releases) on our website. ## [v8.57.2](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/eslint-plugin/CHANGELOG.md#8572-2026-03-23) ##### 🩹 Fixes - **eslint-plugin:** \[prefer-readonly-parameter-types] preserve type alias infomation ([#11954](typescript-eslint/typescript-eslint#11954)) - **eslint-plugin:** \[no-useless-default-assignment] skip reporting false positives for unresolved type parameters ([#12127](typescript-eslint/typescript-eslint#12127)) - **eslint-plugin:** \[no-unsafe-return] false positive on unwrapping generic ([#12125](typescript-eslint/typescript-eslint#12125)) - **eslint-plugin:** \[no-restricted-types] flag banned generics in extends or implements ([#12120](typescript-eslint/typescript-eslint#12120)) - **eslint-plugin:** \[array-type] ignore Array and ReadonlyArray without type arguments ([#11971](typescript-eslint/typescript-eslint#11971)) - **eslint-plugin:** \[prefer-optional-chain] remove dangling closing parenthesis ([#11865](typescript-eslint/typescript-eslint#11865)) ##### ❤️ Thank You - Kirk Waiblinger [@kirkwaiblinger](https://github.com/kirkwaiblinger) - Konv Suu - mdm317 - Newton Yuan [@NewtonYuan](https://github.com/NewtonYuan) - SungHyun627 [@SungHyun627](https://github.com/SungHyun627) - Tamashoo [@Tamashoo](https://github.com/Tamashoo) See [GitHub Releases](https://github.com/typescript-eslint/typescript-eslint/releases/tag/v8.57.2) for more information. You can read about our [versioning strategy](https://typescript-eslint.io/users/versioning) and [releases](https://typescript-eslint.io/users/releases) on our website. ## [v8.57.1](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/eslint-plugin/CHANGELOG.md#8571-2026-03-16) ##### 🩹 Fixes - **eslint-plugin:** \[prefer-optional-chain] no report for property on intersection type ([#12126](typescript-eslint/typescript-eslint#12126)) ##### ❤️ Thank You - Newton Yuan [@NewtonYuan](https://github.com/NewtonYuan) See [GitHub Releases](https://github.com/typescript-eslint/typescript-eslint/releases/tag/v8.57.1) for more information. You can read about our [versioning strategy](https://typescript-eslint.io/users/versioning) and [releases](https://typescript-eslint.io/users/releases) on our website. ## [v8.57.0](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/eslint-plugin/CHANGELOG.md#8570-2026-03-09) ##### 🚀 Features - **eslint-plugin:** \[no-unnecessary-condition] allow literal loop conditions in for/do loops ([#12080](typescript-eslint/typescript-eslint#12080)) ##### 🩹 Fixes - **eslint-plugin:** \[no-base-to-string] fix false positive for toString with overloads ([#12089](typescript-eslint/typescript-eslint#12089)) - **eslint-plugin:** \[prefer-promise-reject-errors] add allow `TypeOrValueSpecifier` to prefer-promise-reject-errors ([#12094](typescript-eslint/typescript-eslint#12094)) - **typescript-estree:** if the template literal is tagged and the text has an invalid escape, `cooked` will be `null` ([#11355](typescript-eslint/typescript-eslint#11355)) - **eslint-plugin:** guard against negative paramIndex in no-useless-default-assignment ([#12077](typescript-eslint/typescript-eslint#12077)) - **eslint-plugin:** handle statically analyzable computed keys in prefer-readonly ([#12079](typescript-eslint/typescript-eslint#12079)) - **eslint-plugin:** \[strict-void-return] false positives with overloads ([#12055](typescript-eslint/typescript-eslint#12055)) ##### ❤️ Thank You - Brad Zacher [@bradzacher](https://github.com/bradzacher) - Brian Schlenker [@bschlenk](https://github.com/bschlenk) - Evyatar Daud [@StyleShit](https://github.com/StyleShit) - James Henry [@JamesHenry](https://github.com/JamesHenry) - Josh Goldberg - Kirk Waiblinger [@kirkwaiblinger](https://github.com/kirkwaiblinger) - Moses Odutusin [@thebolarin](https://github.com/thebolarin) - Newton Yuan [@NewtonYuan](https://github.com/NewtonYuan) - SungHyun627 [@SungHyun627](https://github.com/SungHyun627) - Younsang Na [@nayounsang](https://github.com/nayounsang) See [GitHub Releases](https://github.com/typescript-eslint/typescript-eslint/releases/tag/v8.57.0) for more information. You can read about our [versioning strategy](https://typescript-eslint.io/users/versioning) and [releases](https://typescript-eslint.io/users/releases) on our website. ## [v8.56.1](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/eslint-plugin/CHANGELOG.md#8561-2026-02-23) This was a version bump only for eslint-plugin to align it with other projects, there were no code changes. See [GitHub Releases](https://github.com/typescript-eslint/typescript-eslint/releases/tag/v8.56.1) for more information. You can read about our [versioning strategy](https://typescript-eslint.io/users/versioning) and [releases](https://typescript-eslint.io/users/releases) on our website.

@anasm266

| datasource | package | from | to | | ---------- | -------------------------------- | ------ | ------ | | npm | @typescript-eslint/eslint-plugin | 8.56.0 | 8.59.1 | | npm | @typescript-eslint/parser | 8.56.0 | 8.59.1 | ## [v8.59.1](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/eslint-plugin/CHANGELOG.md#8591-2026-04-27) ##### 🩹 Fixes - **eslint-plugin:** \[no-unnecessary-condition] treat void as nullish in no-unnecessary-condition ([#12241](typescript-eslint/typescript-eslint#12241)) - **eslint-plugin:** \[no-unnecessary-type-arguments] handle instantiation expressions ([#12220](typescript-eslint/typescript-eslint#12220)) - **eslint-plugin:** \[no-unnecessary-type-assertion] avoid false positive in logical assignment assertions ([#12278](typescript-eslint/typescript-eslint#12278)) - **eslint-plugin:** \[no-unnecessary-type-assertion] preserve phantom type arguments in generic inference ([#12269](typescript-eslint/typescript-eslint#12269)) - **eslint-plugin:** \[no-unnecessary-type-assertion] preserve index signatures in undefined unions ([#12257](typescript-eslint/typescript-eslint#12257)) - **eslint-plugin:** \[no-unnecessary-type-assertion] fix crash "TypeError: checker.getTypeArguments is not a function" ([#12246](typescript-eslint/typescript-eslint#12246)) ##### ❤️ Thank You - anasm266 [@anasm266](https://github.com/anasm266) - Anshika Jain [@Anshikakalpana](https://github.com/Anshikakalpana) - Ulrich Stark - yugo innami [@nami8824](https://github.com/nami8824) See [GitHub Releases](https://github.com/typescript-eslint/typescript-eslint/releases/tag/v8.59.1) for more information. You can read about our [versioning strategy](https://typescript-eslint.io/users/versioning) and [releases](https://typescript-eslint.io/users/releases) on our website. ## [v8.59.0](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/eslint-plugin/CHANGELOG.md#8590-2026-04-20) ##### 🚀 Features - **eslint-plugin:** \[no-unnecessary-type-assertion] report more cases based on assignability ([#11789](typescript-eslint/typescript-eslint#11789)) ##### ❤️ Thank You - Ulrich Stark See [GitHub Releases](https://github.com/typescript-eslint/typescript-eslint/releases/tag/v8.59.0) for more information. You can read about our [versioning strategy](https://typescript-eslint.io/users/versioning) and [releases](https://typescript-eslint.io/users/releases) on our website. ## [v8.58.2](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/eslint-plugin/CHANGELOG.md#8582-2026-04-13) ##### 🩹 Fixes - **eslint-plugin:** \[no-unnecessary-condition] use assignability checks in checkTypePredicates ([#12147](typescript-eslint/typescript-eslint#12147)) - remove tsbuildinfo cache file from published packages ([#12187](typescript-eslint/typescript-eslint#12187)) ##### ❤️ Thank You - Abhijeet Singh [@cseas](https://github.com/cseas) - 송재욱 See [GitHub Releases](https://github.com/typescript-eslint/typescript-eslint/releases/tag/v8.58.2) for more information. You can read about our [versioning strategy](https://typescript-eslint.io/users/versioning) and [releases](https://typescript-eslint.io/users/releases) on our website. ## [v8.58.1](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/eslint-plugin/CHANGELOG.md#8581-2026-04-08) ##### 🩹 Fixes - **eslint-plugin:** \[no-unused-vars] fix false negative for type predicate parameter ([#12004](typescript-eslint/typescript-eslint#12004)) ##### ❤️ Thank You - MinJae [@Ju-MINJAE](https://github.com/Ju-MINJAE) See [GitHub Releases](https://github.com/typescript-eslint/typescript-eslint/releases/tag/v8.58.1) for more information. You can read about our [versioning strategy](https://typescript-eslint.io/users/versioning) and [releases](https://typescript-eslint.io/users/releases) on our website. ## [v8.58.0](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/eslint-plugin/CHANGELOG.md#8580-2026-03-30) ##### 🚀 Features - support TypeScript 6 ([#12124](typescript-eslint/typescript-eslint#12124)) ##### 🩹 Fixes - **eslint-plugin:** \[prefer-regexp-exec] avoid fixing unknown RegExp flags ([#12161](typescript-eslint/typescript-eslint#12161)) - **eslint-plugin:** \[no-extraneous-class] handle index signatures ([#12142](typescript-eslint/typescript-eslint#12142)) - **eslint-plugin:** crash in `no-unnecessary-type-arguments` ([#12163](typescript-eslint/typescript-eslint#12163)) ##### ❤️ Thank You - ej shafran [@ej-shafran](https://github.com/ej-shafran) - Evyatar Daud [@StyleShit](https://github.com/StyleShit) - GG ZIBLAKING - milkboy2564 [@SeolJaeHyeok](https://github.com/SeolJaeHyeok) - teee32 [@teee32](https://github.com/teee32) See [GitHub Releases](https://github.com/typescript-eslint/typescript-eslint/releases/tag/v8.58.0) for more information. You can read about our [versioning strategy](https://typescript-eslint.io/users/versioning) and [releases](https://typescript-eslint.io/users/releases) on our website. ## [v8.57.2](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/eslint-plugin/CHANGELOG.md#8572-2026-03-23) ##### 🩹 Fixes - **eslint-plugin:** \[prefer-readonly-parameter-types] preserve type alias infomation ([#11954](typescript-eslint/typescript-eslint#11954)) - **eslint-plugin:** \[no-useless-default-assignment] skip reporting false positives for unresolved type parameters ([#12127](typescript-eslint/typescript-eslint#12127)) - **eslint-plugin:** \[no-unsafe-return] false positive on unwrapping generic ([#12125](typescript-eslint/typescript-eslint#12125)) - **eslint-plugin:** \[no-restricted-types] flag banned generics in extends or implements ([#12120](typescript-eslint/typescript-eslint#12120)) - **eslint-plugin:** \[array-type] ignore Array and ReadonlyArray without type arguments ([#11971](typescript-eslint/typescript-eslint#11971)) - **eslint-plugin:** \[prefer-optional-chain] remove dangling closing parenthesis ([#11865](typescript-eslint/typescript-eslint#11865)) ##### ❤️ Thank You - Kirk Waiblinger [@kirkwaiblinger](https://github.com/kirkwaiblinger) - Konv Suu - mdm317 - Newton Yuan [@NewtonYuan](https://github.com/NewtonYuan) - SungHyun627 [@SungHyun627](https://github.com/SungHyun627) - Tamashoo [@Tamashoo](https://github.com/Tamashoo) See [GitHub Releases](https://github.com/typescript-eslint/typescript-eslint/releases/tag/v8.57.2) for more information. You can read about our [versioning strategy](https://typescript-eslint.io/users/versioning) and [releases](https://typescript-eslint.io/users/releases) on our website. ## [v8.57.1](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/eslint-plugin/CHANGELOG.md#8571-2026-03-16) ##### 🩹 Fixes - **eslint-plugin:** \[prefer-optional-chain] no report for property on intersection type ([#12126](typescript-eslint/typescript-eslint#12126)) ##### ❤️ Thank You - Newton Yuan [@NewtonYuan](https://github.com/NewtonYuan) See [GitHub Releases](https://github.com/typescript-eslint/typescript-eslint/releases/tag/v8.57.1) for more information. You can read about our [versioning strategy](https://typescript-eslint.io/users/versioning) and [releases](https://typescript-eslint.io/users/releases) on our website. ## [v8.57.0](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/eslint-plugin/CHANGELOG.md#8570-2026-03-09) ##### 🚀 Features - **eslint-plugin:** \[no-unnecessary-condition] allow literal loop conditions in for/do loops ([#12080](typescript-eslint/typescript-eslint#12080)) ##### 🩹 Fixes - **eslint-plugin:** \[no-base-to-string] fix false positive for toString with overloads ([#12089](typescript-eslint/typescript-eslint#12089)) - **eslint-plugin:** \[prefer-promise-reject-errors] add allow `TypeOrValueSpecifier` to prefer-promise-reject-errors ([#12094](typescript-eslint/typescript-eslint#12094)) - **typescript-estree:** if the template literal is tagged and the text has an invalid escape, `cooked` will be `null` ([#11355](typescript-eslint/typescript-eslint#11355)) - **eslint-plugin:** guard against negative paramIndex in no-useless-default-assignment ([#12077](typescript-eslint/typescript-eslint#12077)) - **eslint-plugin:** handle statically analyzable computed keys in prefer-readonly ([#12079](typescript-eslint/typescript-eslint#12079)) - **eslint-plugin:** \[strict-void-return] false positives with overloads ([#12055](typescript-eslint/typescript-eslint#12055)) ##### ❤️ Thank You - Brad Zacher [@bradzacher](https://github.com/bradzacher) - Brian Schlenker [@bschlenk](https://github.com/bschlenk) - Evyatar Daud [@StyleShit](https://github.com/StyleShit) - James Henry [@JamesHenry](https://github.com/JamesHenry) - Josh Goldberg - Kirk Waiblinger [@kirkwaiblinger](https://github.com/kirkwaiblinger) - Moses Odutusin [@thebolarin](https://github.com/thebolarin) - Newton Yuan [@NewtonYuan](https://github.com/NewtonYuan) - SungHyun627 [@SungHyun627](https://github.com/SungHyun627) - Younsang Na [@nayounsang](https://github.com/nayounsang) See [GitHub Releases](https://github.com/typescript-eslint/typescript-eslint/releases/tag/v8.57.0) for more information. You can read about our [versioning strategy](https://typescript-eslint.io/users/versioning) and [releases](https://typescript-eslint.io/users/releases) on our website. ## [v8.56.1](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/eslint-plugin/CHANGELOG.md#8561-2026-02-23) This was a version bump only for eslint-plugin to align it with other projects, there were no code changes. See [GitHub Releases](https://github.com/typescript-eslint/typescript-eslint/releases/tag/v8.56.1) for more information. You can read about our [versioning strategy](https://typescript-eslint.io/users/versioning) and [releases](https://typescript-eslint.io/users/releases) on our website.

@kirkwaiblinger

| datasource | package | from | to | | ---------- | -------------------------------- | ------ | ------ | | npm | @typescript-eslint/eslint-plugin | 8.56.0 | 8.59.2 | | npm | @typescript-eslint/parser | 8.56.0 | 8.59.2 | ## [v8.59.2](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/eslint-plugin/CHANGELOG.md#8592-2026-05-04) ##### 🩹 Fixes - **eslint-plugin:** \[no-deprecated] object destructuring values should be treated as declarations ([#12292](typescript-eslint/typescript-eslint#12292)) - **eslint-plugin:** \[no-unsafe-type-assertion] handle crash on recursive template literal types ([#12150](typescript-eslint/typescript-eslint#12150)) ##### ❤️ Thank You - Dima Barabash - Kirk Waiblinger [@kirkwaiblinger](https://github.com/kirkwaiblinger) See [GitHub Releases](https://github.com/typescript-eslint/typescript-eslint/releases/tag/v8.59.2) for more information. You can read about our [versioning strategy](https://typescript-eslint.io/users/versioning) and [releases](https://typescript-eslint.io/users/releases) on our website. ## [v8.59.1](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/eslint-plugin/CHANGELOG.md#8591-2026-04-27) ##### 🩹 Fixes - **eslint-plugin:** \[no-unnecessary-condition] treat void as nullish in no-unnecessary-condition ([#12241](typescript-eslint/typescript-eslint#12241)) - **eslint-plugin:** \[no-unnecessary-type-arguments] handle instantiation expressions ([#12220](typescript-eslint/typescript-eslint#12220)) - **eslint-plugin:** \[no-unnecessary-type-assertion] avoid false positive in logical assignment assertions ([#12278](typescript-eslint/typescript-eslint#12278)) - **eslint-plugin:** \[no-unnecessary-type-assertion] preserve phantom type arguments in generic inference ([#12269](typescript-eslint/typescript-eslint#12269)) - **eslint-plugin:** \[no-unnecessary-type-assertion] preserve index signatures in undefined unions ([#12257](typescript-eslint/typescript-eslint#12257)) - **eslint-plugin:** \[no-unnecessary-type-assertion] fix crash "TypeError: checker.getTypeArguments is not a function" ([#12246](typescript-eslint/typescript-eslint#12246)) ##### ❤️ Thank You - anasm266 [@anasm266](https://github.com/anasm266) - Anshika Jain [@Anshikakalpana](https://github.com/Anshikakalpana) - Ulrich Stark - yugo innami [@nami8824](https://github.com/nami8824) See [GitHub Releases](https://github.com/typescript-eslint/typescript-eslint/releases/tag/v8.59.1) for more information. You can read about our [versioning strategy](https://typescript-eslint.io/users/versioning) and [releases](https://typescript-eslint.io/users/releases) on our website. ## [v8.59.0](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/eslint-plugin/CHANGELOG.md#8590-2026-04-20) ##### 🚀 Features - **eslint-plugin:** \[no-unnecessary-type-assertion] report more cases based on assignability ([#11789](typescript-eslint/typescript-eslint#11789)) ##### ❤️ Thank You - Ulrich Stark See [GitHub Releases](https://github.com/typescript-eslint/typescript-eslint/releases/tag/v8.59.0) for more information. You can read about our [versioning strategy](https://typescript-eslint.io/users/versioning) and [releases](https://typescript-eslint.io/users/releases) on our website. ## [v8.58.2](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/eslint-plugin/CHANGELOG.md#8582-2026-04-13) ##### 🩹 Fixes - **eslint-plugin:** \[no-unnecessary-condition] use assignability checks in checkTypePredicates ([#12147](typescript-eslint/typescript-eslint#12147)) - remove tsbuildinfo cache file from published packages ([#12187](typescript-eslint/typescript-eslint#12187)) ##### ❤️ Thank You - Abhijeet Singh [@cseas](https://github.com/cseas) - 송재욱 See [GitHub Releases](https://github.com/typescript-eslint/typescript-eslint/releases/tag/v8.58.2) for more information. You can read about our [versioning strategy](https://typescript-eslint.io/users/versioning) and [releases](https://typescript-eslint.io/users/releases) on our website. ## [v8.58.1](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/eslint-plugin/CHANGELOG.md#8581-2026-04-08) ##### 🩹 Fixes - **eslint-plugin:** \[no-unused-vars] fix false negative for type predicate parameter ([#12004](typescript-eslint/typescript-eslint#12004)) ##### ❤️ Thank You - MinJae [@Ju-MINJAE](https://github.com/Ju-MINJAE) See [GitHub Releases](https://github.com/typescript-eslint/typescript-eslint/releases/tag/v8.58.1) for more information. You can read about our [versioning strategy](https://typescript-eslint.io/users/versioning) and [releases](https://typescript-eslint.io/users/releases) on our website. ## [v8.58.0](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/eslint-plugin/CHANGELOG.md#8580-2026-03-30) ##### 🚀 Features - support TypeScript 6 ([#12124](typescript-eslint/typescript-eslint#12124)) ##### 🩹 Fixes - **eslint-plugin:** \[prefer-regexp-exec] avoid fixing unknown RegExp flags ([#12161](typescript-eslint/typescript-eslint#12161)) - **eslint-plugin:** \[no-extraneous-class] handle index signatures ([#12142](typescript-eslint/typescript-eslint#12142)) - **eslint-plugin:** crash in `no-unnecessary-type-arguments` ([#12163](typescript-eslint/typescript-eslint#12163)) ##### ❤️ Thank You - ej shafran [@ej-shafran](https://github.com/ej-shafran) - Evyatar Daud [@StyleShit](https://github.com/StyleShit) - GG ZIBLAKING - milkboy2564 [@SeolJaeHyeok](https://github.com/SeolJaeHyeok) - teee32 [@teee32](https://github.com/teee32) See [GitHub Releases](https://github.com/typescript-eslint/typescript-eslint/releases/tag/v8.58.0) for more information. You can read about our [versioning strategy](https://typescript-eslint.io/users/versioning) and [releases](https://typescript-eslint.io/users/releases) on our website. ## [v8.57.2](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/eslint-plugin/CHANGELOG.md#8572-2026-03-23) ##### 🩹 Fixes - **eslint-plugin:** \[prefer-readonly-parameter-types] preserve type alias infomation ([#11954](typescript-eslint/typescript-eslint#11954)) - **eslint-plugin:** \[no-useless-default-assignment] skip reporting false positives for unresolved type parameters ([#12127](typescript-eslint/typescript-eslint#12127)) - **eslint-plugin:** \[no-unsafe-return] false positive on unwrapping generic ([#12125](typescript-eslint/typescript-eslint#12125)) - **eslint-plugin:** \[no-restricted-types] flag banned generics in extends or implements ([#12120](typescript-eslint/typescript-eslint#12120)) - **eslint-plugin:** \[array-type] ignore Array and ReadonlyArray without type arguments ([#11971](typescript-eslint/typescript-eslint#11971)) - **eslint-plugin:** \[prefer-optional-chain] remove dangling closing parenthesis ([#11865](typescript-eslint/typescript-eslint#11865)) ##### ❤️ Thank You - Kirk Waiblinger [@kirkwaiblinger](https://github.com/kirkwaiblinger) - Konv Suu - mdm317 - Newton Yuan [@NewtonYuan](https://github.com/NewtonYuan) - SungHyun627 [@SungHyun627](https://github.com/SungHyun627) - Tamashoo [@Tamashoo](https://github.com/Tamashoo) See [GitHub Releases](https://github.com/typescript-eslint/typescript-eslint/releases/tag/v8.57.2) for more information. You can read about our [versioning strategy](https://typescript-eslint.io/users/versioning) and [releases](https://typescript-eslint.io/users/releases) on our website. ## [v8.57.1](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/eslint-plugin/CHANGELOG.md#8571-2026-03-16) ##### 🩹 Fixes - **eslint-plugin:** \[prefer-optional-chain] no report for property on intersection type ([#12126](typescript-eslint/typescript-eslint#12126)) ##### ❤️ Thank You - Newton Yuan [@NewtonYuan](https://github.com/NewtonYuan) See [GitHub Releases](https://github.com/typescript-eslint/typescript-eslint/releases/tag/v8.57.1) for more information. You can read about our [versioning strategy](https://typescript-eslint.io/users/versioning) and [releases](https://typescript-eslint.io/users/releases) on our website. ## [v8.57.0](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/eslint-plugin/CHANGELOG.md#8570-2026-03-09) ##### 🚀 Features - **eslint-plugin:** \[no-unnecessary-condition] allow literal loop conditions in for/do loops ([#12080](typescript-eslint/typescript-eslint#12080)) ##### 🩹 Fixes - **eslint-plugin:** \[no-base-to-string] fix false positive for toString with overloads ([#12089](typescript-eslint/typescript-eslint#12089)) - **eslint-plugin:** \[prefer-promise-reject-errors] add allow `TypeOrValueSpecifier` to prefer-promise-reject-errors ([#12094](typescript-eslint/typescript-eslint#12094)) - **typescript-estree:** if the template literal is tagged and the text has an invalid escape, `cooked` will be `null` ([#11355](typescript-eslint/typescript-eslint#11355)) - **eslint-plugin:** guard against negative paramIndex in no-useless-default-assignment ([#12077](typescript-eslint/typescript-eslint#12077)) - **eslint-plugin:** handle statically analyzable computed keys in prefer-readonly ([#12079](typescript-eslint/typescript-eslint#12079)) - **eslint-plugin:** \[strict-void-return] false positives with overloads ([#12055](typescript-eslint/typescript-eslint#12055)) ##### ❤️ Thank You - Brad Zacher [@bradzacher](https://github.com/bradzacher) - Brian Schlenker [@bschlenk](https://github.com/bschlenk) - Evyatar Daud [@StyleShit](https://github.com/StyleShit) - James Henry [@JamesHenry](https://github.com/JamesHenry) - Josh Goldberg - Kirk Waiblinger [@kirkwaiblinger](https://github.com/kirkwaiblinger) - Moses Odutusin [@thebolarin](https://github.com/thebolarin) - Newton Yuan [@NewtonYuan](https://github.com/NewtonYuan) - SungHyun627 [@SungHyun627](https://github.com/SungHyun627) - Younsang Na [@nayounsang](https://github.com/nayounsang) See [GitHub Releases](https://github.com/typescript-eslint/typescript-eslint/releases/tag/v8.57.0) for more information. You can read about our [versioning strategy](https://typescript-eslint.io/users/versioning) and [releases](https://typescript-eslint.io/users/releases) on our website. ## [v8.56.1](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/eslint-plugin/CHANGELOG.md#8561-2026-02-23) This was a version bump only for eslint-plugin to align it with other projects, there were no code changes. See [GitHub Releases](https://github.com/typescript-eslint/typescript-eslint/releases/tag/v8.56.1) for more information. You can read about our [versioning strategy](https://typescript-eslint.io/users/versioning) and [releases](https://typescript-eslint.io/users/releases) on our website.

@kirkwaiblinger

| datasource | package | from | to | | ---------- | -------------------------------- | ------ | ------ | | npm | @typescript-eslint/eslint-plugin | 8.56.0 | 8.59.2 | | npm | @typescript-eslint/parser | 8.56.0 | 8.59.2 | ## [v8.59.2](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/eslint-plugin/CHANGELOG.md#8592-2026-05-04) ##### 🩹 Fixes - **eslint-plugin:** \[no-deprecated] object destructuring values should be treated as declarations ([#12292](typescript-eslint/typescript-eslint#12292)) - **eslint-plugin:** \[no-unsafe-type-assertion] handle crash on recursive template literal types ([#12150](typescript-eslint/typescript-eslint#12150)) ##### ❤️ Thank You - Dima Barabash - Kirk Waiblinger [@kirkwaiblinger](https://github.com/kirkwaiblinger) See [GitHub Releases](https://github.com/typescript-eslint/typescript-eslint/releases/tag/v8.59.2) for more information. You can read about our [versioning strategy](https://typescript-eslint.io/users/versioning) and [releases](https://typescript-eslint.io/users/releases) on our website. ## [v8.59.1](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/eslint-plugin/CHANGELOG.md#8591-2026-04-27) ##### 🩹 Fixes - **eslint-plugin:** \[no-unnecessary-condition] treat void as nullish in no-unnecessary-condition ([#12241](typescript-eslint/typescript-eslint#12241)) - **eslint-plugin:** \[no-unnecessary-type-arguments] handle instantiation expressions ([#12220](typescript-eslint/typescript-eslint#12220)) - **eslint-plugin:** \[no-unnecessary-type-assertion] avoid false positive in logical assignment assertions ([#12278](typescript-eslint/typescript-eslint#12278)) - **eslint-plugin:** \[no-unnecessary-type-assertion] preserve phantom type arguments in generic inference ([#12269](typescript-eslint/typescript-eslint#12269)) - **eslint-plugin:** \[no-unnecessary-type-assertion] preserve index signatures in undefined unions ([#12257](typescript-eslint/typescript-eslint#12257)) - **eslint-plugin:** \[no-unnecessary-type-assertion] fix crash "TypeError: checker.getTypeArguments is not a function" ([#12246](typescript-eslint/typescript-eslint#12246)) ##### ❤️ Thank You - anasm266 [@anasm266](https://github.com/anasm266) - Anshika Jain [@Anshikakalpana](https://github.com/Anshikakalpana) - Ulrich Stark - yugo innami [@nami8824](https://github.com/nami8824) See [GitHub Releases](https://github.com/typescript-eslint/typescript-eslint/releases/tag/v8.59.1) for more information. You can read about our [versioning strategy](https://typescript-eslint.io/users/versioning) and [releases](https://typescript-eslint.io/users/releases) on our website. ## [v8.59.0](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/eslint-plugin/CHANGELOG.md#8590-2026-04-20) ##### 🚀 Features - **eslint-plugin:** \[no-unnecessary-type-assertion] report more cases based on assignability ([#11789](typescript-eslint/typescript-eslint#11789)) ##### ❤️ Thank You - Ulrich Stark See [GitHub Releases](https://github.com/typescript-eslint/typescript-eslint/releases/tag/v8.59.0) for more information. You can read about our [versioning strategy](https://typescript-eslint.io/users/versioning) and [releases](https://typescript-eslint.io/users/releases) on our website. ## [v8.58.2](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/eslint-plugin/CHANGELOG.md#8582-2026-04-13) ##### 🩹 Fixes - **eslint-plugin:** \[no-unnecessary-condition] use assignability checks in checkTypePredicates ([#12147](typescript-eslint/typescript-eslint#12147)) - remove tsbuildinfo cache file from published packages ([#12187](typescript-eslint/typescript-eslint#12187)) ##### ❤️ Thank You - Abhijeet Singh [@cseas](https://github.com/cseas) - 송재욱 See [GitHub Releases](https://github.com/typescript-eslint/typescript-eslint/releases/tag/v8.58.2) for more information. You can read about our [versioning strategy](https://typescript-eslint.io/users/versioning) and [releases](https://typescript-eslint.io/users/releases) on our website. ## [v8.58.1](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/eslint-plugin/CHANGELOG.md#8581-2026-04-08) ##### 🩹 Fixes - **eslint-plugin:** \[no-unused-vars] fix false negative for type predicate parameter ([#12004](typescript-eslint/typescript-eslint#12004)) ##### ❤️ Thank You - MinJae [@Ju-MINJAE](https://github.com/Ju-MINJAE) See [GitHub Releases](https://github.com/typescript-eslint/typescript-eslint/releases/tag/v8.58.1) for more information. You can read about our [versioning strategy](https://typescript-eslint.io/users/versioning) and [releases](https://typescript-eslint.io/users/releases) on our website. ## [v8.58.0](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/eslint-plugin/CHANGELOG.md#8580-2026-03-30) ##### 🚀 Features - support TypeScript 6 ([#12124](typescript-eslint/typescript-eslint#12124)) ##### 🩹 Fixes - **eslint-plugin:** \[prefer-regexp-exec] avoid fixing unknown RegExp flags ([#12161](typescript-eslint/typescript-eslint#12161)) - **eslint-plugin:** \[no-extraneous-class] handle index signatures ([#12142](typescript-eslint/typescript-eslint#12142)) - **eslint-plugin:** crash in `no-unnecessary-type-arguments` ([#12163](typescript-eslint/typescript-eslint#12163)) ##### ❤️ Thank You - ej shafran [@ej-shafran](https://github.com/ej-shafran) - Evyatar Daud [@StyleShit](https://github.com/StyleShit) - GG ZIBLAKING - milkboy2564 [@SeolJaeHyeok](https://github.com/SeolJaeHyeok) - teee32 [@teee32](https://github.com/teee32) See [GitHub Releases](https://github.com/typescript-eslint/typescript-eslint/releases/tag/v8.58.0) for more information. You can read about our [versioning strategy](https://typescript-eslint.io/users/versioning) and [releases](https://typescript-eslint.io/users/releases) on our website. ## [v8.57.2](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/eslint-plugin/CHANGELOG.md#8572-2026-03-23) ##### 🩹 Fixes - **eslint-plugin:** \[prefer-readonly-parameter-types] preserve type alias infomation ([#11954](typescript-eslint/typescript-eslint#11954)) - **eslint-plugin:** \[no-useless-default-assignment] skip reporting false positives for unresolved type parameters ([#12127](typescript-eslint/typescript-eslint#12127)) - **eslint-plugin:** \[no-unsafe-return] false positive on unwrapping generic ([#12125](typescript-eslint/typescript-eslint#12125)) - **eslint-plugin:** \[no-restricted-types] flag banned generics in extends or implements ([#12120](typescript-eslint/typescript-eslint#12120)) - **eslint-plugin:** \[array-type] ignore Array and ReadonlyArray without type arguments ([#11971](typescript-eslint/typescript-eslint#11971)) - **eslint-plugin:** \[prefer-optional-chain] remove dangling closing parenthesis ([#11865](typescript-eslint/typescript-eslint#11865)) ##### ❤️ Thank You - Kirk Waiblinger [@kirkwaiblinger](https://github.com/kirkwaiblinger) - Konv Suu - mdm317 - Newton Yuan [@NewtonYuan](https://github.com/NewtonYuan) - SungHyun627 [@SungHyun627](https://github.com/SungHyun627) - Tamashoo [@Tamashoo](https://github.com/Tamashoo) See [GitHub Releases](https://github.com/typescript-eslint/typescript-eslint/releases/tag/v8.57.2) for more information. You can read about our [versioning strategy](https://typescript-eslint.io/users/versioning) and [releases](https://typescript-eslint.io/users/releases) on our website. ## [v8.57.1](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/eslint-plugin/CHANGELOG.md#8571-2026-03-16) ##### 🩹 Fixes - **eslint-plugin:** \[prefer-optional-chain] no report for property on intersection type ([#12126](typescript-eslint/typescript-eslint#12126)) ##### ❤️ Thank You - Newton Yuan [@NewtonYuan](https://github.com/NewtonYuan) See [GitHub Releases](https://github.com/typescript-eslint/typescript-eslint/releases/tag/v8.57.1) for more information. You can read about our [versioning strategy](https://typescript-eslint.io/users/versioning) and [releases](https://typescript-eslint.io/users/releases) on our website. ## [v8.57.0](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/eslint-plugin/CHANGELOG.md#8570-2026-03-09) ##### 🚀 Features - **eslint-plugin:** \[no-unnecessary-condition] allow literal loop conditions in for/do loops ([#12080](typescript-eslint/typescript-eslint#12080)) ##### 🩹 Fixes - **eslint-plugin:** \[no-base-to-string] fix false positive for toString with overloads ([#12089](typescript-eslint/typescript-eslint#12089)) - **eslint-plugin:** \[prefer-promise-reject-errors] add allow `TypeOrValueSpecifier` to prefer-promise-reject-errors ([#12094](typescript-eslint/typescript-eslint#12094)) - **typescript-estree:** if the template literal is tagged and the text has an invalid escape, `cooked` will be `null` ([#11355](typescript-eslint/typescript-eslint#11355)) - **eslint-plugin:** guard against negative paramIndex in no-useless-default-assignment ([#12077](typescript-eslint/typescript-eslint#12077)) - **eslint-plugin:** handle statically analyzable computed keys in prefer-readonly ([#12079](typescript-eslint/typescript-eslint#12079)) - **eslint-plugin:** \[strict-void-return] false positives with overloads ([#12055](typescript-eslint/typescript-eslint#12055)) ##### ❤️ Thank You - Brad Zacher [@bradzacher](https://github.com/bradzacher) - Brian Schlenker [@bschlenk](https://github.com/bschlenk) - Evyatar Daud [@StyleShit](https://github.com/StyleShit) - James Henry [@JamesHenry](https://github.com/JamesHenry) - Josh Goldberg - Kirk Waiblinger [@kirkwaiblinger](https://github.com/kirkwaiblinger) - Moses Odutusin [@thebolarin](https://github.com/thebolarin) - Newton Yuan [@NewtonYuan](https://github.com/NewtonYuan) - SungHyun627 [@SungHyun627](https://github.com/SungHyun627) - Younsang Na [@nayounsang](https://github.com/nayounsang) See [GitHub Releases](https://github.com/typescript-eslint/typescript-eslint/releases/tag/v8.57.0) for more information. You can read about our [versioning strategy](https://typescript-eslint.io/users/versioning) and [releases](https://typescript-eslint.io/users/releases) on our website. ## [v8.56.1](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/eslint-plugin/CHANGELOG.md#8561-2026-02-23) This was a version bump only for eslint-plugin to align it with other projects, there were no code changes. See [GitHub Releases](https://github.com/typescript-eslint/typescript-eslint/releases/tag/v8.56.1) for more information. You can read about our [versioning strategy](https://typescript-eslint.io/users/versioning) and [releases](https://typescript-eslint.io/users/releases) on our website.

fix(eslint-plugin): [no-unused-vars] fix false negative for type pred…

3b0450a

…icate parameter (typescript-eslint#12003)

bradzacher requested changes Feb 2, 2026

View reviewed changes

Comment thread packages/eslint-plugin/src/rules/no-unused-vars.ts Outdated

bradzacher added the awaiting response Issues waiting for a reply from the OP or another party label Feb 2, 2026

fix(eslint-plugin): [no-unused-vars] handle parameters used only in t…

dc8abeb

…ype predicates

JoshuaKGoldberg requested a review from bradzacher March 7, 2026 15:21

JoshuaKGoldberg removed the awaiting response Issues waiting for a reply from the OP or another party label Mar 7, 2026

JoshuaKGoldberg approved these changes Mar 21, 2026

View reviewed changes

JoshuaKGoldberg requested review from bradzacher and removed request for bradzacher March 21, 2026 22:16

JoshuaKGoldberg added the 1 approval >=1 team member has approved this PR; we're now leaving it open for more reviews before we merge label Mar 21, 2026

github-actions Bot removed the 1 approval >=1 team member has approved this PR; we're now leaving it open for more reviews before we merge label Mar 21, 2026

bradzacher approved these changes Apr 8, 2026

View reviewed changes

Merge branch 'main' into fix/issue-12003

24135a4

typescript-eslint deleted a comment from github-actions Bot Apr 8, 2026

bradzacher changed the title ~~fix(eslint-plugin): [no-unused-vars] fix false negative for type predicate parameter (#12003)~~ fix(eslint-plugin): [no-unused-vars] fix false negative for type predicate parameter Apr 8, 2026

bradzacher merged commit c3f8ed5 into typescript-eslint:main Apr 8, 2026
60 of 61 checks passed

koizuka mentioned this pull request Apr 11, 2026

chore: update typescript-eslint to 8.58 koizuka/drawing-practice#60

Merged

4 tasks

github-actions Bot mentioned this pull request Apr 13, 2026

chore(deps): update dependency typescript-eslint to v8.58.1 lacolaco/blog.lacolaco.net#1490

Merged

1 task

Ju-MINJAE deleted the fix/issue-12003 branch April 14, 2026 02:09

campaigner-prod Bot mentioned this pull request Apr 23, 2026

fix(deps): vuln minor upgrades — 15 packages (minor: 6 · patch: 9) DataDog/ensure-ci-success#60

Closed

4 tasks

Provide feedback

Saved searches

Use saved searches to filter your results more quickly

Uh oh!

fix(eslint-plugin): [no-unused-vars] fix false negative for type predicate parameter#12004

fix(eslint-plugin): [no-unused-vars] fix false negative for type predicate parameter#12004
bradzacher merged 3 commits into
typescript-eslint:mainfrom
Ju-MINJAE:fix/issue-12003

Ju-MINJAE commented Jan 28, 2026 •

edited

Loading

Uh oh!

typescript-eslint Bot commented Jan 28, 2026

Uh oh!

netlify Bot commented Jan 28, 2026 •

edited

Loading

Uh oh!

nx-cloud Bot commented Jan 28, 2026 •

edited

Loading

Uh oh!

codecov Bot commented Jan 28, 2026 •

edited

Loading

Uh oh!

Uh oh!

JoshuaKGoldberg commented Mar 7, 2026

Uh oh!

Ju-MINJAE commented Mar 7, 2026

Uh oh!

JoshuaKGoldberg left a comment •

edited

Loading

Uh oh!

bradzacher commented Apr 8, 2026

Uh oh!

Ju-MINJAE commented Apr 8, 2026

Uh oh!

Uh oh!

Reviewers

Assignees

Labels

Projects

Milestone

Development

Uh oh!

3 participants

Uh oh!

Conversation

Ju-MINJAE commented Jan 28, 2026 • edited Loading Uh oh! There was an error while loading. Please reload this page.

Uh oh!

PR Checklist

Overview

Uh oh!

typescript-eslint Bot commented Jan 28, 2026

Uh oh!

netlify Bot commented Jan 28, 2026 • edited Loading Uh oh! There was an error while loading. Please reload this page.

Uh oh!

✅ Deploy Preview for typescript-eslint ready!

Uh oh!

nx-cloud Bot commented Jan 28, 2026 • edited Loading Uh oh! There was an error while loading. Please reload this page.

Uh oh!

Uh oh!

codecov Bot commented Jan 28, 2026 • edited Loading Uh oh! There was an error while loading. Please reload this page.

Uh oh!

Codecov Report

Uh oh!

Uh oh!

JoshuaKGoldberg commented Mar 7, 2026

Uh oh!

Ju-MINJAE commented Mar 7, 2026

Uh oh!

JoshuaKGoldberg left a comment • edited Loading Uh oh! There was an error while loading. Please reload this page.

Uh oh!

Choose a reason for hiding this comment

Uh oh!

bradzacher commented Apr 8, 2026

Uh oh!

Ju-MINJAE commented Apr 8, 2026

Uh oh!

Uh oh!

Reviewers

Assignees

Labels

Projects

Milestone

Development

Uh oh!

3 participants

Ju-MINJAE commented Jan 28, 2026 •

edited

Loading

netlify Bot commented Jan 28, 2026 •

edited

Loading

nx-cloud Bot commented Jan 28, 2026 •

edited

Loading

codecov Bot commented Jan 28, 2026 •

edited

Loading

JoshuaKGoldberg left a comment •

edited

Loading