@typescript-eslint/type-utils

@typescript-eslint/type-utils

Type utilities for working with TypeScript within ESLint rules.

The utilities in this package are separated from @typescript-eslint/utils so that that package does not require a dependency on typescript.

See https://typescript-eslint.io for general documentation on typescript-eslint, the tooling that allows you to run ESLint and Prettier on TypeScript code.

Changelog

8.0.1 (2024-08-05)

🩹 Fixes

• eslint-plugin: [no-unused-vars] ignore imports used only as types (#9694)

❤️ Thank You

• Jake Bailey @jakebailey

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

👉 See Announcing typescript-eslint v8 for an upgrade guide and the full list of changes.

⚠️ Breaking Changes

• typescript-estree: split TSMappedType typeParameter into constraint and key (#7065)
• parser: always enable comment, loc, range, tokens (#8617)
• eslint-plugin: [prefer-nullish-coalescing] change ignoreConditionalTests default to true (#8872)
• typescript-estree: enable dot globs for project by default (#8818)
• eslint-plugin: deprecate no-loss-of-precision extension rule (#8832)
• eslint-plugin: remove formatting/layout rules (#8833)
• typescript-estree: remove slow deprecated and isolated programs (#8834)
• typescript-estree: add TSEnumBody node for TSEnumDeclaration body (#8920)
• typescript-estree: rename automaticSingleRunInference to disallowAutomaticSingleRunInference (#8922)
• ast-spec: remove deprecated type params (#8933)
• type-utils: remove IsNullableTypeOptions interface (#8934)
• eslint-plugin: [no-unused-vars] align catch behavior to ESLint 9 (#8971)
• utils: swap LegacyESLint out for FlatESLint as ESLint export (#8972)
• eslint-plugin: split no-empty-object-type out from ban-types and no-empty-interfaces (#8977)
• utils: allow specifying additional rule meta.docs in RuleCreator (#9025)
• eslint-plugin: apply initial config changes for v8 (#9079)
• eslint-plugin: replace ban-types with no-restricted-types, no-unsafe-function-type, no-wrapper-object-types (#9102)
• typescript-estree: remove EXPERIMENTAL_useSourceOfProjectReferenceRedirect (#9104)
• eslint-plugin: remove no-useless-template-literals (#9207)
• type-utils: remove getTokenAtPosition (#9444)
• eslint-plugin: [no-floating-promises] disable checkThenables by default for v8 (#9559)
• rule-tester: switched to flat config (#9603)

🚀 Features

• stricter parent types for the AST (#9560)
• speed up non-type-aware linting with project service (#8322)
• v8 integration branch (#9165)
• eslint-plugin: remove deprecated no-throw-literal rule (#9092)
• eslint-plugin: [no-floating-promises] add 'allowForKnownSafeCalls' option (#9234)
• eslint-plugin: [no-unused-vars] add reportUnusedIgnorePattern option (#9324)
• eslint-plugin: [no-unused-vars] support ignoreClassWithStaticInitBlock (#9325)
• eslint-plugin: [no-unused-vars] handle comma operator for assignments, treat for-of the same as for-in (#9326)
• eslint-plugin: [no-unused-vars] report if var used only in typeof (#9330)
• eslint-plugin: [return-await] add return-await to strict-type-checked preset (#9604)
• eslint-plugin: [no-unnecessary-type-parameters] promote to strict (#9662)
• rule-tester: support multipass fixes (#8883)
• type-utils: support intersection types in TypeOrValueSpecifier (#9633)
• typescript-estree: stabilize EXPERIMENTAL_useProjectService as projectService (#9084)
• typescript-estree: also remove projectService in withoutProjectParserOptions (#9287)
• typescript-estree: exposes ProjectService logs through the plugin (#9337)
• utils: add Linter configType constructor option (#8999)
• utils: remove deprecated context helpers (#9000)

🩹 Fixes

• correct eslint-plugin's peerDependency on parser@8 (#9089)
• bring back in allowdefaultprojectforfiles rename (7dfceeeea)
• disable projectService in disabled-type-checked shared config (#9460)
• eslint-plugin: include alpha pre-releases in parser peer dependency (#9099)
• eslint-plugin: correct rules.d.ts types to not rely on non-existent imports (#9339)
• eslint-plugin: remove duplicate import RuleModuleWithMetaDocs (#9465)
• eslint-plugin: [no-unnecessary-template-expression] do not render escaped strings in autofixes (#8688)
• eslint-plugin: [no-unused-vars] incorporate upstream changes around caught errors report messages (#9532)
• eslint-plugin: [no-misused-promises] perf: avoid getting types of variables/functions if the annotated type is obviously not a function (#9656)
• rule-tester: set configType to eslintrc in Linter options (#9178)
• rule-tester: re-apply updates from main (#9180)
• rule-tester: provide Linter a cwd in its constructor (#9678)
• type-utils: also check declared modules for package names in TypeOrValueSpecifier (#9500)
• types: allow ProjectServiceOptions for projectService (#9318)
• typescript-estree: pass extraFileExtensions to projectService (#9051)
• typescript-estree: only run projectService setHostConfiguration when needed (#9336)
• typescript-estree: specific error for parserOptions.project not including a file (#9584)
• typescript-estree: adds support for project services using extended config files (#9306)
• typescript-estree: factor tsconfigRootDir into allowDefaultProject (#9675)

❤️ Thank You

• Abraham Guo
• Alfred Ringstad @alfredringstad
• auvred @auvred
• Brad Zacher @bradzacher
• Christopher Aubut @higherorderfunctor
• Collin Bachman @bachmacintosh
• James Henry @JamesHenry
• Josh Goldberg
• Josh Goldberg ✨
• Kirk Waiblinger @kirkwaiblinger
• StyleShit @StyleShit
• Victor Lin @yepitschunked
• Yukihiro Hasegawa @y-hsgw

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