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feat: deprecate tseslint.config() #11531

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Merged
merged 14 commits into from
Sep 1, 2025
Merged

feat: deprecate tseslint.config() #11531

merged 14 commits into from
Sep 1, 2025

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@kirkwaiblinger
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@kirkwaiblinger kirkwaiblinger commented Aug 26, 2025 •
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Important

If you've come across this PR looking for info on migrating off of tseslint.config(), please see https://typescript-eslint.io/packages/typescript-eslint#migrating-to-defineconfig

PR Checklist

Overview

  • Replaces tseslint.config() in the docs everywhere with defineConfig()
  • adds /** @deprecated */ to tseslint.config().
  • adds deprecation/migration info to the docs.
  • switches our eslint config to use defineConfig()

Questions

  • Should we use the defineConfig(a, b, c) or defineConfig([a, b, c]) style? The eslint docs (inexplicably) use defineConfig([a, b, c]) throughout, but defineConfig(a, b, c) is much better in a TS context since each argument's type is checked individually. I've gone with that approach for now, but we can change to match their style if we want.

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typescript-eslint bot commented Aug 26, 2025

Thanks for the PR, @kirkwaiblinger!

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@kirkwaiblinger kirkwaiblinger changed the title docs: deprecate tseslint.config() feat: deprecate tseslint.config() Aug 27, 2025
@kirkwaiblinger kirkwaiblinger marked this pull request as ready for review August 27, 2025 17:28
JoshuaKGoldberg
JoshuaKGoldberg reviewed Aug 27, 2025
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JoshuaKGoldberg
JoshuaKGoldberg previously approved these changes Aug 27, 2025
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Always nice to see a formatter issue filed as a result of docs work 😅

Great stuff!

Josh-Cena
Josh-Cena approved these changes Aug 28, 2025
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LGTM

@Josh-Cena Josh-Cena added the 1 approval >=1 team member has approved this PR; we're now leaving it open for more reviews before we merge label Aug 28, 2025
@kachkaev kachkaev mentioned this pull request Aug 28, 2025
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@kirkwaiblinger kirkwaiblinger enabled auto-merge (squash) September 1, 2025 05:29
@kirkwaiblinger kirkwaiblinger merged commit d7614a7 into typescript-eslint:main Sep 1, 2025
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@kirkwaiblinger kirkwaiblinger deleted the deprecate-tseslint-config branch September 1, 2025 15:22
@chrisbbreuer chrisbbreuer mentioned this pull request Sep 2, 2025
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@stefanprobst
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stefanprobst commented Sep 2, 2025 •
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is the ConfigWithExtends type available publicly?

@stevezhu stevezhu mentioned this pull request Sep 3, 2025
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stevezhu added a commit to stevezhu/eslint-config that referenced this pull request Sep 3, 2025
@stevezhu
Re-export eslint/config exports (#44)
01180a7 
typescript-eslint/typescript-eslint#10935
typescript-eslint/typescript-eslint#11531
@corneliusroemer
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corneliusroemer commented Sep 4, 2025

Migration guide for deprecated tseslint.config() -> defineConfig: https://typescript-eslint.io/packages/typescript-eslint/#migrating-to-defineconfig

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kirkwaiblinger commented Sep 4, 2025

@stefanprobst

is the ConfigWithExtends type available publicly?

This isn't directly related to this PR, and we anyways try to avoid commenting on closed PRs (docs). Would you mind reaching out to us with one of the methods in the contributing guide to continue the conversation?

Thanks!

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@Josh-Cena Josh-Cena Josh-Cena approved these changes

@JoshuaKGoldberg JoshuaKGoldberg Awaiting requested review from JoshuaKGoldberg

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Docs: Mention defineConfig(); remove mention of tseslint.config()

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@kirkwaiblinger @stefanprobst @corneliusroemer @JoshuaKGoldberg @Josh-Cena