Update TypeScript-ESLint and its rule tester to v8.59.1

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
@typescript-eslint/rule-tester (source)	8.55.0 → 8.59.1
typescript-eslint (source)	8.55.0 → 8.59.1

---

Release Notes

typescript-eslint/typescript-eslint (@​typescript-eslint/rule-tester)

v8.59.1

Compare Source

This was a version bump only for rule-tester to align it with other projects, there were no code changes.

See GitHub Releases for more information.

You can read about our versioning strategy and releases on our website.

v8.59.0

Compare Source

🚀 Features

• eslint-plugin: [no-unnecessary-type-assertion] report more cases based on assignability (#​11789)

❤️ Thank You

• Ulrich Stark

See GitHub Releases for more information.

You can read about our versioning strategy and releases on our website.

v8.58.2

Compare Source

🩹 Fixes

• remove tsbuildinfo cache file from published packages (#​12187)

❤️ Thank You

• Abhijeet Singh @​cseas

See GitHub Releases for more information.

You can read about our versioning strategy and releases on our website.

v8.58.1

Compare Source

This was a version bump only for rule-tester to align it with other projects, there were no code changes.

See GitHub Releases for more information.

You can read about our versioning strategy and releases on our website.

v8.58.0

Compare Source

This was a version bump only for rule-tester to align it with other projects, there were no code changes.

See GitHub Releases for more information.

You can read about our versioning strategy and releases on our website.

v8.57.2

Compare Source

8.57.2 (2026-03-23)

🩹 Fixes

• eslint-plugin: [prefer-optional-chain] remove dangling closing parenthesis (#​11865)
• eslint-plugin: [array-type] ignore Array and ReadonlyArray without type arguments (#​11971)
• eslint-plugin: [no-restricted-types] flag banned generics in extends or implements (#​12120)
• eslint-plugin: [no-unsafe-return] false positive on unwrapping generic (#​12125)
• eslint-plugin: [no-unsafe-return] false positive on unwrapping generic (#​12125)
• eslint-plugin: [no-useless-default-assignment] skip reporting false positives for unresolved type parameters (#​12127)
• eslint-plugin: [prefer-readonly-parameter-types] preserve type alias infomation (#​11954)
• typescript-estree: skip createIsolatedProgram fallback for projectService (#​12066, #​12065)

❤️ Thank You

• Kirk Waiblinger @​kirkwaiblinger
• Konv Suu
• mdm317
• Newton Yuan @​NewtonYuan
• RyoheiYamamoto
• SungHyun627 @​SungHyun627
• Tamashoo @​Tamashoo

See GitHub Releases for more information.

You can read about our versioning strategy and releases on our website.

v8.57.1

Compare Source

8.57.1 (2026-03-16)

🩹 Fixes

• eslint-plugin: [prefer-optional-chain] no report for property on intersection type (#​12126)

❤️ Thank You

• Newton Yuan @​NewtonYuan

See GitHub Releases for more information.

You can read about our versioning strategy and releases on our website.

v8.57.0

Compare Source

This was a version bump only for rule-tester to align it with other projects, there were no code changes.

See GitHub Releases for more information.

You can read about our versioning strategy and releases on our website.

v8.56.1

Compare Source

This was a version bump only for rule-tester to align it with other projects, there were no code changes.

See GitHub Releases for more information.

You can read about our versioning strategy and releases on our website.

v8.56.0

Compare Source

🚀 Features

• support ESLint v10 (#​12057)

🩹 Fixes

• use parser options from context.languageOptions (#​12043)

❤️ Thank You

• Brad Zacher @​bradzacher
• fnx @​DMartens
• Joshua Chen

See GitHub Releases for more information.

You can read about our versioning strategy and releases on our website.

typescript-eslint/typescript-eslint (typescript-eslint)

v8.59.1

Compare Source

This was a version bump only for typescript-eslint to align it with other projects, there were no code changes.

See GitHub Releases for more information.

You can read about our versioning strategy and releases on our website.

v8.59.0

Compare Source

This was a version bump only for typescript-eslint to align it with other projects, there were no code changes.

See GitHub Releases for more information.

You can read about our versioning strategy and releases on our website.

v8.58.2

Compare Source

🩹 Fixes

• remove tsbuildinfo cache file from published packages (#​12187)

❤️ Thank You

• Abhijeet Singh @​cseas

See GitHub Releases for more information.

You can read about our versioning strategy and releases on our website.

v8.58.1

Compare Source

This was a version bump only for typescript-eslint to align it with other projects, there were no code changes.

See GitHub Releases for more information.

You can read about our versioning strategy and releases on our website.

v8.58.0

Compare Source

🚀 Features

• support TypeScript 6 (#​12124)

❤️ Thank You

• Evyatar Daud @​StyleShit

See GitHub Releases for more information.

You can read about our versioning strategy and releases on our website.

v8.57.2

Compare Source

This was a version bump only for typescript-eslint to align it with other projects, there were no code changes.

See GitHub Releases for more information.

You can read about our versioning strategy and releases on our website.

v8.57.1

Compare Source

This was a version bump only for typescript-eslint to align it with other projects, there were no code changes.

See GitHub Releases for more information.

You can read about our versioning strategy and releases on our website.

v8.57.0

Compare Source

This was a version bump only for typescript-eslint to align it with other projects, there were no code changes.

See GitHub Releases for more information.

You can read about our versioning strategy and releases on our website.

v8.56.1

Compare Source

This was a version bump only for typescript-eslint to align it with other projects, there were no code changes.

See GitHub Releases for more information.

You can read about our versioning strategy and releases on our website.

v8.56.0

Compare Source

🚀 Features

• support ESLint v10 (#​12057)

❤️ Thank You

• Brad Zacher @​bradzacher
• Joshua Chen

See GitHub Releases for more information.

You can read about our versioning strategy and releases on our website.

---

Configuration

📅 Schedule: (UTC)

• Branch creation
  • At any time (no schedule defined)
• Automerge
  • At any time (no schedule defined)

🚦 Automerge: Disabled by config. Please merge this manually once you are satisfied.

♻ Rebasing: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about these updates again.

---

• If you want to rebase/retry this PR, check this box

---

This PR was generated by Mend Renovate. View the repository job log.

[socket-security]

Review the following changes in direct dependencies. Learn more about Socket for GitHub.

Diff	Package	Supply Chain Security	Vulnerability	Quality	Maintenance	License
	typescript-eslint@​8.55.0 ⏵ 8.59.1				+1
	@​typescript-eslint/​rule-tester@​8.55.0 ⏵ 8.59.1	+1		+1

View full report

[RobinTail]

in #3208

[renovate]

Renovate Ignore Notification

Because you closed this PR without merging, Renovate will ignore this update (^8.51.0). You will get a PR once a newer version is released. To ignore this dependency forever, add it to the ignoreDeps array of your Renovate config.

If you accidentally closed this PR, or if you changed your mind: rename this PR to get a fresh replacement PR.