feat: update to TypeScript 5.9.2 #11445

bradzacher · 2025-08-02T01:56:54Z

PR Checklist

Addresses an existing open issue: TypeScript 5.9 Support #11389
That issue was marked as accepting prs
Steps in Contributing were taken

Overview

This PR bumps the dependency version and regenerates the lib defs.

typescript-eslint · 2025-08-02T01:56:56Z

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codecov · 2025-08-02T02:43:28Z

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 90.88%. Comparing base (b872e2b) to head (42911d9).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #11445      +/-   ##
==========================================
+ Coverage   90.86%   90.88%   +0.01%     
==========================================
  Files         503      505       +2     
  Lines       51052    51124      +72     
  Branches     8416     8416              
==========================================
+ Hits        46390    46462      +72     
  Misses       4648     4648              
  Partials       14       14

Flag	Coverage Δ
unittest	`90.88% <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/scope-manager/src/lib/dom.iterable.ts	`100.00% <100.00%> (ø)`
packages/scope-manager/src/lib/dom.ts	`100.00% <100.00%> (ø)`
packages/scope-manager/src/lib/esnext.error.ts	`100.00% <100.00%> (ø)`
...kages/scope-manager/src/lib/esnext.sharedmemory.ts	`100.00% <100.00%> (ø)`
packages/scope-manager/src/lib/esnext.ts	`100.00% <100.00%> (ø)`
packages/scope-manager/src/lib/index.ts	`100.00% <100.00%> (ø)`
...ckages/scope-manager/src/lib/webworker.iterable.ts	`100.00% <100.00%> (ø)`
packages/scope-manager/src/lib/webworker.ts	`100.00% <100.00%> (ø)`
packages/typescript-estree/src/convert.ts	`30.20% <ø> (ø)`
...ipt-estree/src/parseSettings/warnAboutTSVersion.ts	`97.50% <100.00%> (ø)`

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sdavids · 2025-08-02T19:26:07Z

package.json

@@ -98,7 +98,7 @@
    "rimraf": "^5.0.5",
    "semver": "7.7.0",
    "tsx": "*",
-    "typescript": ">=4.8.4 <5.9.0",
+    "typescript": ">=4.8.4 <6.0.0",


You could be more conservative here (and in other places) and use <5.10.0.

https://devblogs.microsoft.com/typescript/announcing-typescript-5-9/#what’s-next

Now that TypeScript 5.9 is out [...] next version: TypeScript 6.0.

They might change their mind though and add 5.10 in between …

TypeScript versioning works this way.
They will not do a 5.10 release - only a 6.0

See also this PR; microsoft/TypeScript#62162

kirkwaiblinger

Linter failure appears to be legitimate, but otherwise LGTM

kirkwaiblinger

🚀🚀

@bradzacher

| datasource | package | from | to | | ---------- | -------------------------------- | ------ | ------ | | npm | @typescript-eslint/eslint-plugin | 8.32.1 | 8.39.0 | | npm | @typescript-eslint/parser | 8.32.1 | 8.39.0 | ## [v8.39.0](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/eslint-plugin/CHANGELOG.md#8390-2025-08-04) ##### 🚀 Features - **eslint-plugin:** \[only-throw-error] support yield/await expressions ([#11417](typescript-eslint/typescript-eslint#11417)) - **eslint-plugin:** add no-unnecessary-type-conversion to strict-type-checked ruleset ([#11427](typescript-eslint/typescript-eslint#11427)) - update to TypeScript 5.9.2 ([#11445](typescript-eslint/typescript-eslint#11445)) - **eslint-plugin:** \[naming-convention] add enumMember PascalCase default option ([#11127](typescript-eslint/typescript-eslint#11127)) ##### 🩹 Fixes - **eslint-plugin:** \[no-unsafe-assignment] add an `unsafeObjectPattern` message ([#11403](typescript-eslint/typescript-eslint#11403)) - **eslint-plugin:** \[prefer-optional-chain] ignore `check` option for most RHS of a chain ([#11272](typescript-eslint/typescript-eslint#11272)) ##### ❤️ Thank You - Brad Zacher [@bradzacher](https://github.com/bradzacher) - James Garbutt [@43081j](https://github.com/43081j) - Kim Sang Du [@developer-bandi](https://github.com/developer-bandi) - Sasha Kondrashov - tao - Younsang Na [@nayounsang](https://github.com/nayounsang) You can read about our [versioning strategy](https://main--typescript-eslint.netlify.app/users/versioning) and [releases](https://main--typescript-eslint.netlify.app/users/releases) on our website. ## [v8.38.0](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/eslint-plugin/CHANGELOG.md#8380-2025-07-21) ##### 🩹 Fixes - disallow extra properties in rule options ([#11397](typescript-eslint/typescript-eslint#11397)) - **eslint-plugin:** \[consistent-generic-constructors] resolve conflict with `isolatedDeclarations` if enabled in `constructor` option ([#11351](typescript-eslint/typescript-eslint#11351)) ##### ❤️ Thank You - Andrew Kazakov [@andreww2012](https://github.com/andreww2012) - Younsang Na [@nayounsang](https://github.com/nayounsang) You can read about our [versioning strategy](https://main--typescript-eslint.netlify.app/users/versioning) and [releases](https://main--typescript-eslint.netlify.app/users/releases) on our website. ## [v8.37.0](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/eslint-plugin/CHANGELOG.md#8370-2025-07-14) ##### 🩹 Fixes - **eslint-plugin:** \[unified-signatures] fix false positives for ignoreOverloadsWithDifferentJSDoc option ([#11381](typescript-eslint/typescript-eslint#11381)) ##### ❤️ Thank You - Yukihiro Hasegawa [@y-hsgw](https://github.com/y-hsgw) You can read about our [versioning strategy](https://main--typescript-eslint.netlify.app/users/versioning) and [releases](https://main--typescript-eslint.netlify.app/users/releases) on our website. ## [v8.36.0](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/eslint-plugin/CHANGELOG.md#8360-2025-07-07) This was a version bump only for eslint-plugin to align it with other projects, there were no code changes. You can read about our [versioning strategy](https://main--typescript-eslint.netlify.app/users/versioning) and [releases](https://main--typescript-eslint.netlify.app/users/releases) on our website. ## [v8.35.1](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/eslint-plugin/CHANGELOG.md#8351-2025-06-30) ##### 🩹 Fixes - remove prettier from eslint-plugin ([#11339](typescript-eslint/typescript-eslint#11339)) ##### ❤️ Thank You - Abhijeet Singh [@cseas](https://github.com/cseas) You can read about our [versioning strategy](https://main--typescript-eslint.netlify.app/users/versioning) and [releases](https://main--typescript-eslint.netlify.app/users/releases) on our website. ## [v8.35.0](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/eslint-plugin/CHANGELOG.md#8350-2025-06-23) ##### 🚀 Features - **eslint-plugin:** \[no-base-to-string] add checkUnknown Option ([#11128](typescript-eslint/typescript-eslint#11128)) ##### ❤️ Thank You - Kim Sang Du [@developer-bandi](https://github.com/developer-bandi) You can read about our [versioning strategy](https://main--typescript-eslint.netlify.app/users/versioning) and [releases](https://main--typescript-eslint.netlify.app/users/releases) on our website. ## [v8.34.1](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/eslint-plugin/CHANGELOG.md#8341-2025-06-16) This was a version bump only for eslint-plugin to align it with other projects, there were no code changes. You can read about our [versioning strategy](https://main--typescript-eslint.netlify.app/users/versioning) and [releases](https://main--typescript-eslint.netlify.app/users/releases) on our website. ## [v8.34.0](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/eslint-plugin/CHANGELOG.md#8340-2025-06-09) ##### 🩹 Fixes - **typescript-estree:** add validation to interface extends ([#11271](typescript-eslint/typescript-eslint#11271)) ##### ❤️ Thank You - Tao You can read about our [versioning strategy](https://main--typescript-eslint.netlify.app/users/versioning) and [releases](https://main--typescript-eslint.netlify.app/users/releases) on our website. ## [v8.33.1](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/eslint-plugin/CHANGELOG.md#8331-2025-06-02) ##### 🩹 Fixes - exclude docs/ directory from eslint-plugin package ([#11251](typescript-eslint/typescript-eslint#11251)) ##### ❤️ Thank You - roottool You can read about our [versioning strategy](https://main--typescript-eslint.netlify.app/users/versioning) and [releases](https://main--typescript-eslint.netlify.app/users/releases) on our website. ## [v8.33.0](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/eslint-plugin/CHANGELOG.md#8330-2025-05-26) This was a version bump only for eslint-plugin to align it with other projects, there were no code changes. 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@bradzacher

| datasource | package | from | to | | ---------- | -------------------------------- | ------ | ------ | | npm | @typescript-eslint/eslint-plugin | 8.32.1 | 8.39.0 | | npm | @typescript-eslint/parser | 8.32.1 | 8.39.0 | ## [v8.39.0](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/eslint-plugin/CHANGELOG.md#8390-2025-08-04) ##### 🚀 Features - **eslint-plugin:** \[only-throw-error] support yield/await expressions ([#11417](typescript-eslint/typescript-eslint#11417)) - **eslint-plugin:** add no-unnecessary-type-conversion to strict-type-checked ruleset ([#11427](typescript-eslint/typescript-eslint#11427)) - update to TypeScript 5.9.2 ([#11445](typescript-eslint/typescript-eslint#11445)) - **eslint-plugin:** \[naming-convention] add enumMember PascalCase default option ([#11127](typescript-eslint/typescript-eslint#11127)) ##### 🩹 Fixes - **eslint-plugin:** \[no-unsafe-assignment] add an `unsafeObjectPattern` message ([#11403](typescript-eslint/typescript-eslint#11403)) - **eslint-plugin:** \[prefer-optional-chain] ignore `check` option for most RHS of a chain ([#11272](typescript-eslint/typescript-eslint#11272)) ##### ❤️ Thank You - Brad Zacher [@bradzacher](https://github.com/bradzacher) - James Garbutt [@43081j](https://github.com/43081j) - Kim Sang Du [@developer-bandi](https://github.com/developer-bandi) - Sasha Kondrashov - tao - Younsang Na [@nayounsang](https://github.com/nayounsang) You can read about our [versioning strategy](https://main--typescript-eslint.netlify.app/users/versioning) and [releases](https://main--typescript-eslint.netlify.app/users/releases) on our website. ## [v8.38.0](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/eslint-plugin/CHANGELOG.md#8380-2025-07-21) ##### 🩹 Fixes - disallow extra properties in rule options ([#11397](typescript-eslint/typescript-eslint#11397)) - **eslint-plugin:** \[consistent-generic-constructors] resolve conflict with `isolatedDeclarations` if enabled in `constructor` option ([#11351](typescript-eslint/typescript-eslint#11351)) ##### ❤️ Thank You - Andrew Kazakov [@andreww2012](https://github.com/andreww2012) - Younsang Na [@nayounsang](https://github.com/nayounsang) You can read about our [versioning strategy](https://main--typescript-eslint.netlify.app/users/versioning) and [releases](https://main--typescript-eslint.netlify.app/users/releases) on our website. ## [v8.37.0](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/eslint-plugin/CHANGELOG.md#8370-2025-07-14) ##### 🩹 Fixes - **eslint-plugin:** \[unified-signatures] fix false positives for ignoreOverloadsWithDifferentJSDoc option ([#11381](typescript-eslint/typescript-eslint#11381)) ##### ❤️ Thank You - Yukihiro Hasegawa [@y-hsgw](https://github.com/y-hsgw) You can read about our [versioning strategy](https://main--typescript-eslint.netlify.app/users/versioning) and [releases](https://main--typescript-eslint.netlify.app/users/releases) on our website. ## [v8.36.0](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/eslint-plugin/CHANGELOG.md#8360-2025-07-07) This was a version bump only for eslint-plugin to align it with other projects, there were no code changes. You can read about our [versioning strategy](https://main--typescript-eslint.netlify.app/users/versioning) and [releases](https://main--typescript-eslint.netlify.app/users/releases) on our website. ## [v8.35.1](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/eslint-plugin/CHANGELOG.md#8351-2025-06-30) ##### 🩹 Fixes - remove prettier from eslint-plugin ([#11339](typescript-eslint/typescript-eslint#11339)) ##### ❤️ Thank You - Abhijeet Singh [@cseas](https://github.com/cseas) You can read about our [versioning strategy](https://main--typescript-eslint.netlify.app/users/versioning) and [releases](https://main--typescript-eslint.netlify.app/users/releases) on our website. ## [v8.35.0](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/eslint-plugin/CHANGELOG.md#8350-2025-06-23) ##### 🚀 Features - **eslint-plugin:** \[no-base-to-string] add checkUnknown Option ([#11128](typescript-eslint/typescript-eslint#11128)) ##### ❤️ Thank You - Kim Sang Du [@developer-bandi](https://github.com/developer-bandi) You can read about our [versioning strategy](https://main--typescript-eslint.netlify.app/users/versioning) and [releases](https://main--typescript-eslint.netlify.app/users/releases) on our website. ## [v8.34.1](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/eslint-plugin/CHANGELOG.md#8341-2025-06-16) This was a version bump only for eslint-plugin to align it with other projects, there were no code changes. You can read about our [versioning strategy](https://main--typescript-eslint.netlify.app/users/versioning) and [releases](https://main--typescript-eslint.netlify.app/users/releases) on our website. ## [v8.34.0](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/eslint-plugin/CHANGELOG.md#8340-2025-06-09) ##### 🩹 Fixes - **typescript-estree:** add validation to interface extends ([#11271](typescript-eslint/typescript-eslint#11271)) ##### ❤️ Thank You - Tao You can read about our [versioning strategy](https://main--typescript-eslint.netlify.app/users/versioning) and [releases](https://main--typescript-eslint.netlify.app/users/releases) on our website. ## [v8.33.1](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/eslint-plugin/CHANGELOG.md#8331-2025-06-02) ##### 🩹 Fixes - exclude docs/ directory from eslint-plugin package ([#11251](typescript-eslint/typescript-eslint#11251)) ##### ❤️ Thank You - roottool You can read about our [versioning strategy](https://main--typescript-eslint.netlify.app/users/versioning) and [releases](https://main--typescript-eslint.netlify.app/users/releases) on our website. ## [v8.33.0](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/eslint-plugin/CHANGELOG.md#8330-2025-05-26) This was a version bump only for eslint-plugin to align it with other projects, there were no code changes. You can read about our [versioning strategy](https://main--typescript-eslint.netlify.app/users/versioning) and [releases](https://main--typescript-eslint.netlify.app/users/releases) on our website.

feat: update to TypeScript 5.9.2

799d99c

bradzacher force-pushed the bjz/typescript-5-9-lib branch from 30a760d to 799d99c Compare August 2, 2025 02:31

sdavids reviewed Aug 2, 2025

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kirkwaiblinger reviewed Aug 2, 2025

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fix lints

42911d9

bradzacher enabled auto-merge (squash) August 3, 2025 00:10

aaylward mentioned this pull request Aug 3, 2025

Bump typescript from 5.8.3 to 5.9.2 muchq/muchq.github.io#8

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kirkwaiblinger approved these changes Aug 3, 2025

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bradzacher merged commit 2112d58 into main Aug 3, 2025
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bradzacher deleted the bjz/typescript-5-9-lib branch August 3, 2025 00:30

LucWollants mentioned this pull request Aug 4, 2025

Bump typescript from 5.8.3 to 5.9.2 cultuurnet/publiq-platform#1924

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martinpitt mentioned this pull request Aug 4, 2025

build(deps-dev): bump typescript from 5.8.3 to 5.9.2 in the types group cockpit-project/starter-kit#1211

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