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typescript-eslint

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typescript-eslint
:sparkles: Monorepo for all the tooling which enables ESLint to support TypeScript

TypeScript · 16392 stars
tslint-to-eslint-config
Converts your TSLint configuration to the closest possible ESLint equivalent. 🚀

TypeScript · 861 stars
ts-api-utils
Utility functions for working with TypeScript's API. Successor to the wonderful tsutils. 🛠️️

TypeScript · 122 stars
examples
Various examples of working with typescript-eslint. 📝

TypeScript · 11 stars
performance
Various performance baselines for typescript-eslint.

TypeScript · 6 stars

Beginner friendly Everything

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Repo: re-enable `@typescript-eslint/internal/plugin-test-formatting` for `naming-convention` tests Open

repo maintenance triage

Difficulty 2/5 1-3 hours Newbie friendliness 65/100

typescript-eslint/typescript-eslint#12905 · Opened Sep 19, 2026
Bug: [unbound-method] False reports on class property with `this: void` Open

accepting prs bug package: eslint-plugin

Difficulty 2/5 1-3 hours Newbie friendliness 35/100

typescript-eslint/typescript-eslint#12887 · Opened Sep 15, 2026
Repo: fix all `eslint-plugin-internal/no-multiple-lines-of-errors` Open

accepting prs repo maintenance

Difficulty 3/5 1-2 days Newbie friendliness 55/100

typescript-eslint/typescript-eslint#12884 · 1 comment · Opened Sep 15, 2026
Enhancement: tighten `TSImportType::options` to ImportAttributes Open

accepting prs AST breaking change enhancement package: ast-spec package: typescript-estree

Difficulty 4/5 3-5 days Newbie friendliness 48/100

typescript-eslint/typescript-eslint#12864 · 1 comment · Opened Sep 11, 2026
Rule proposal: Simplifying booleanish checks Open

enhancement: new plugin rule evaluating community engagement package: eslint-plugin

Difficulty 5/5 Over a week Newbie friendliness 35/100

typescript-eslint/typescript-eslint#12851 · 2 comments · Opened Sep 9, 2026
Repo: migrate rules `defaultOptions` to `meta.defaultOptions` since they are deprecated Open

blocked by another issue package: eslint-plugin repo maintenance

Difficulty 3/5 1-2 days Newbie friendliness 66/100

typescript-eslint/typescript-eslint#12842 · 3 comments · Opened Sep 7, 2026
Repo: the eslint config `eslint-plugin-rules-test-files` files glob pattern is too limited Open

accepting prs repo maintenance

Difficulty 2/5 1-3 hours Newbie friendliness 86/100

typescript-eslint/typescript-eslint#12836 · Opened Sep 6, 2026
Enhancement: expose ambient module import attributes in the ESTree AST Open

accepting prs AST enhancement package: ast-spec package: typescript-estree

Difficulty 3/5 1-2 days Newbie friendliness 68/100

typescript-eslint/typescript-eslint#12810 · 5 comments · Opened Sep 2, 2026
Repo: Codecov reports project-level failures from affected-only coverage Open

accepting prs repo maintenance

Difficulty 2/5 1-3 hours Newbie friendliness 72/100

typescript-eslint/typescript-eslint#12798 · 3 comments · 2 reactions · Opened Aug 31, 2026
Rule proposal: `no-redudant-default-arguments` Open

accepting prs enhancement: new plugin rule package: eslint-plugin

Difficulty 5/5 Over a week Newbie friendliness 45/100

typescript-eslint/typescript-eslint#12782 · 2 comments · 3 reactions · Opened Aug 28, 2026
🐛 Bug: getDeclarationDomain treats type-only imports as value+type Open

type: bug

Difficulty 3/5 1-2 days Newbie friendliness 74/100

typescript-eslint/ts-api-utils#1054 · Opened Aug 26, 2026
Bug: [no-confusing-void-expression] autofix produces TS2355 when the declared return type is `unknown` Open

accepting prs bug package: eslint-plugin

Difficulty 3/5 1-2 days Newbie friendliness 76/100

typescript-eslint/typescript-eslint#12761 · Opened Aug 25, 2026
Configs: [no-floating-promises] change ignoreVoid to false by default Open

evaluating community engagement package: eslint-plugin preset config change

Difficulty 3/5 1-2 days Newbie friendliness 55/100

typescript-eslint/typescript-eslint#12644 · 3 comments · 1 reaction · Opened Aug 1, 2026
Rule/Perf: Reduce allocations in no-floating-promises Open

accepting prs repo maintenance

Difficulty 3/5 1-2 days Newbie friendliness 63/100

typescript-eslint/typescript-eslint#12638 · 1 reaction · Opened Jul 30, 2026
Bug: [no-unnecessary-condition] neverNullish inconsistently reported between computed and dot access with `??` Open

accepting prs bug package: eslint-plugin

Difficulty 3/5 1-2 days Newbie friendliness 55/100

typescript-eslint/typescript-eslint#12580 · 1 reaction · Opened Jul 20, 2026
🐛 Bug: Typescript 7 support Open

type: bug

Difficulty 3/5 1-2 days Newbie friendliness 48/100

typescript-eslint/ts-api-utils#1051 · 1 comment · Opened Jul 10, 2026
Enhancement: [no-duplicate-type-constituents] Add checkOptionalProperties option, intended for projects without `exactOptionalPropertyTypes` enabled Open

enhancement: plugin rule option evaluating community engagement package: eslint-plugin

Difficulty 4/5 3-5 days Newbie friendliness 48/100

typescript-eslint/typescript-eslint#12434 · 2 comments · Opened Jun 18, 2026
bug: Missing converter for `tslint-misc-rules/class-method-newlines` → `lines-between-class-members` Open

Difficulty 2/5 1-3 hours Newbie friendliness 35/100

typescript-eslint/tslint-to-eslint-config#1983 · Opened May 23, 2026
Docs: [no-unnecessary-condition] `checkTypePredicates` section: mention assumptions of valid type predicates Open

accepting prs documentation

Difficulty 2/5 1-3 hours Newbie friendliness 55/100

typescript-eslint/typescript-eslint#12349 · 1 comment · 1 reaction · Opened May 20, 2026
Enhancement: [no-unnecessary-condition] detect unnecessary type guard callbacks passed directly Open

accepting prs enhancement: plugin rule option package: eslint-plugin

Difficulty 4/5 3-5 days Newbie friendliness 55/100

typescript-eslint/typescript-eslint#12343 · 4 comments · Opened May 19, 2026
[no-unnecessary-type-assertion] does not flag redundant 'as const' on literals in contextually-typed positions Open

accepting prs enhancement: plugin rule option package: eslint-plugin

Difficulty 3/5 1-2 days Newbie friendliness 48/100

typescript-eslint/typescript-eslint#12308 · 2 comments · Opened May 4, 2026
Bug: [no-unnecessary-type-assertion] False positive in 8.59.0 from discriminated union handling Open

accepting prs bug package: eslint-plugin

Difficulty 3/5 1-2 days Newbie friendliness 52/100

typescript-eslint/typescript-eslint#12277 · 2 comments · 4 reactions · Opened Apr 24, 2026
Bug: [no-unnecessary-type-assertion] enum false positive(s) in 8.59.0 Open

accepting prs bug package: eslint-plugin

Difficulty 3/5 1-2 days Newbie friendliness 52/100

typescript-eslint/typescript-eslint#12271 · 6 comments · 2 reactions · Opened Apr 23, 2026
Bug: [no-unnecessary-type-assertion] False positive when asserting to type with nested optional properties Open

accepting prs bug package: eslint-plugin

Difficulty 3/5 1-2 days Newbie friendliness 58/100

typescript-eslint/typescript-eslint#12270 · 1 comment · 3 reactions · Opened Apr 23, 2026
Bug: [no-unnecessary-type-assertion] False positive when use assertion to infer array type Open

accepting prs bug package: eslint-plugin

Difficulty 3/5 1-2 days Newbie friendliness 57/100

typescript-eslint/typescript-eslint#12268 · 1 comment · 1 reaction · Opened Apr 23, 2026
Enhancement: Add language: js/js to rules? Open

blocked by another issue breaking change enhancement

Difficulty 5/5 Over a week Newbie friendliness 35/100

typescript-eslint/typescript-eslint#12190 · 4 comments · Opened Apr 1, 2026
🛠 Tooling: Switch from markdownlint to eslint/markdown Open

area: tooling status: accepting prs

Difficulty 3/5 1-2 days Newbie friendliness 48/100

typescript-eslint/ts-api-utils#893 · 2 comments · Opened Mar 21, 2026
🛠 Tooling: update tsconfig Open

area: tooling status: accepting prs

Difficulty 3/5 1-2 days Newbie friendliness 35/100

typescript-eslint/ts-api-utils#862 · 2 reactions · Opened Mar 7, 2026
🛠 Tooling: Unable to merge Release PRs Open

area: tooling status: accepting prs

Difficulty 3/5 1-2 days Newbie friendliness 42/100

typescript-eslint/ts-api-utils#851 · Opened Mar 5, 2026
Rule proposal: no unnecessary type annotations Open

enhancement: new plugin rule package: eslint-plugin team assigned

Difficulty 5/5 Over a week Newbie friendliness 35/100

typescript-eslint/typescript-eslint#12088 · 8 comments · 19 reactions · Opened Feb 26, 2026
Enhancement: support non `.ts` files via custom host Open

accepting prs enhancement external help wanted

Difficulty 5/5 Over a week Newbie friendliness 35/100

typescript-eslint/typescript-eslint#12005 · 6 comments · 14 reactions · Opened Jan 28, 2026
Enhancement(utils): remove `eslint` imports and make `/ts-eslint` a type-only package Open

breaking change enhancement package: utils team assigned

Difficulty 5/5 Over a week Newbie friendliness 32/100

typescript-eslint/typescript-eslint#11939 · 1 comment · 8 reactions · Opened Jan 7, 2026
Docs: Declare `strictNullChecks: false` unsupported Open

breaking change documentation team assigned

Difficulty 3/5 1-2 days Newbie friendliness 35/100

typescript-eslint/typescript-eslint#11886 · 23 comments · 3 reactions · Opened Dec 27, 2025
Docs: Maybe create a common page/section for when types aren't correct at runtime? Open

documentation team assigned

Difficulty 3/5 1-2 days Newbie friendliness 55/100

typescript-eslint/typescript-eslint#11854 · 2 comments · 3 reactions · Opened Dec 17, 2025
Bug: [prefer-optional-chain] unsafe fix when the chain ends with a null comparison (a.b === null) Open

accepting prs bug package: eslint-plugin

Difficulty 3/5 1-2 days Newbie friendliness 65/100

typescript-eslint/typescript-eslint#11840 · 3 comments · 4 reactions · Opened Dec 11, 2025
Bug: [only-throw-error] only-throw-error.allow does not work when type is reexported Open

accepting prs bug package: eslint-plugin

Difficulty 3/5 1-2 days Newbie friendliness 54/100

typescript-eslint/typescript-eslint#11817 · 4 comments · Opened Dec 2, 2025
Enhancement: [no-unsafe-*] check `any`s nested inside object arguments Open

accepting prs enhancement: plugin rule option package: eslint-plugin

Difficulty 4/5 3-5 days Newbie friendliness 35/100

typescript-eslint/typescript-eslint#11801 · 2 comments · Opened Nov 26, 2025
Enhancement: [await-thenable] allow maybe-promises in promise aggregator checks Open

accepting prs enhancement: new plugin rule package: eslint-plugin

Difficulty 5/5 Over a week Newbie friendliness 35/100

typescript-eslint/typescript-eslint#11694 · 7 comments · 8 reactions · Opened Oct 11, 2025
Typed linting optimizations blocked by ESLint core Open

blocked by external API meta

Difficulty 5/5 Over a week Newbie friendliness 25/100

typescript-eslint/typescript-eslint#11677 · 2 comments · 28 reactions · Opened Oct 3, 2025
Enhancement: Remove `TSImportType.qualifier` and `TSImportType.typeArguments` Open

accepting prs breaking change enhancement

Difficulty 5/5 Over a week Newbie friendliness 42/100

typescript-eslint/typescript-eslint#11615 · 8 comments · 2 reactions · Opened Sep 18, 2025
Bug: `getNodeByRangeIndex` returns incorrect node for decorated `ClassDeclaration` inside `ExportDeclaration` Open

accepting prs breaking change bug

Difficulty 3/5 1-2 days Newbie friendliness 38/100

typescript-eslint/typescript-eslint#11578 · 10 comments · 1 reaction · Opened Sep 8, 2025
Docs: Add blog post explaining the deprecation of typedef Open

documentation team assigned

Difficulty 3/5 1-2 days Newbie friendliness 68/100

typescript-eslint/typescript-eslint#11572 · 4 reactions · Opened Sep 5, 2025
Bug: Plugins that re-export types from utils are still incompatible with `defineConfig` types Open

accepting prs bug

Difficulty 4/5 3-5 days Newbie friendliness 45/100

typescript-eslint/typescript-eslint#11543 · 25 comments · 41 reactions · Opened Aug 29, 2025
Links in README broken Open

Difficulty 2/5 1-3 hours Newbie friendliness 35/100

typescript-eslint/examples#24 · Opened Aug 3, 2025
Bug: [no-deprecated] Forbids using the name of a deprecated class member in a child classes constructor Open

bug external package: eslint-plugin

Difficulty 3/5 1-2 days Newbie friendliness 45/100

typescript-eslint/typescript-eslint#11394 · 4 comments · Opened Jul 14, 2025
Enhancement: Convert packages to ESM Open

accepting prs breaking change enhancement

Difficulty 5/5 Over a week Newbie friendliness 25/100

typescript-eslint/typescript-eslint#11379 · 5 comments · 15 reactions · Opened Jul 7, 2025
Enhancement: Bug: remove typings for `context.markVariableAsUsed()` and friends? Open

accepting prs breaking change enhancement package: utils

Difficulty 2/5 1-3 hours Newbie friendliness 35/100

typescript-eslint/typescript-eslint#11371 · Opened Jul 4, 2025
⚡️ Performance: Potential overhead populating implicit globals that don't appear in files Open

accepting prs performance

Difficulty 4/5 3-5 days Newbie friendliness 35/100

typescript-eslint/typescript-eslint#11362 · 2 reactions · Opened Jun 30, 2025
Enhancement: [prefer-for-of] Add autofix / fix suggestions Open

accepting prs enhancement: plugin rule option package: eslint-plugin

Difficulty 4/5 3-5 days Newbie friendliness 45/100

typescript-eslint/typescript-eslint#11336 · 8 comments · Opened Jun 23, 2025
Enhancement: Move `VariableDeclarator.id.typeAnnotation` to `VariableDeclarator.typeAnnotation`? Open

accepting prs breaking change enhancement

Difficulty 5/5 Over a week Newbie friendliness 35/100

typescript-eslint/typescript-eslint#11321 · 10 comments · Opened Jun 19, 2025

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