Update dependency eslint to v9

This MR contains the following updates:

Package	Type	Update	Change
eslint (source)	devDependencies	major	^8.5.0 -> ^9.0.0

---

Release Notes

eslint/eslint (eslint)

v9.30.0

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Features

• 52a5fca feat: Support basePath property in config objects (#​19879) (Milos Djermanovic)
• 4ab4482 feat: add allowSeparateTypeImports option to no-duplicate-imports (#​19872) (sethamus)
• b8a7e7a feat: throw error when column is negative in getIndexFromLoc (#​19831) (루밀LuMir)

Bug Fixes

• 6a0f164 fix: handle null type loc in getIndexFromLoc method (#​19862) (루밀LuMir)
• 3fbcd70 fix: update error message for no-restricted-properties (#​19855) (Tanuj Kanti)
• 7ef4cf7 fix: remove unnecessary semicolon from fixes (#​19857) (Francesco Trotta)
• 7dabc38 fix: use process.version in --env-info (#​19865) (TKDev7)

Documentation

• 8662ed1 docs: adopt eslint-stylistic sub packages related changes (#​19887) (ntnyq)
• 20158b0 docs: typo in comment for unused variables handling (#​19870) (leopardracer)
• ebfb5b4 docs: Fixed Typo in configuration-files.md (#​19873) (0-20)
• 4112fd0 docs: clarify that boolean is still allowed for rule meta.deprecated (#​19866) (Bryan Mishkin)

Chores

• 2b6491c chore: upgrade to @eslint/js@9.30.0 (#​19889) (Francesco Trotta)
• 5a5d526 chore: package.json update for @​eslint/js release (Jenkins)
• eaf8a41 chore: Correct typos in linter tests (#​19878) (kilavvy)

v9.29.0

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Features

• f686fcb feat: add ecmaVersion: 2026, parsing using and await using (#​19832) (Milos Djermanovic)
• 19cdd22 feat: prune suppressions for non-existent files (#​19825) (TKDev7)
• b3d720f feat: add ES2025 globals (#​19835) (fisker Cheung)
• 677a283 feat: add auto-accessor fields support to class-methods-use-this (#​19789) (sethamus)
• dbba058 feat: allow global type declaration in no-var (#​19714) (Remco Haszing)
• 342bd29 feat: ignore type annotations in no-restricted-globals (#​19781) (sethamus)
• 786bcd1 feat: add allowProperties option to no-restricted-properties (#​19772) (sethamus)
• 05b66d0 feat: add sourceCode.isGlobalReference(node) method (#​19695) (Nitin Kumar)

Bug Fixes

• 85c082c fix: explicit matching behavior with negated patterns and arrays (#​19845) (Milos Djermanovic)
• 9bda4a9 fix: fix LintOptions.filterCodeBlock types (#​19837) (ntnyq)
• 7ab77a2 fix: correct breaking deprecation of FlatConfig type (#​19826) (Logicer)
• 1ba3318 fix: add language and dialects to no-use-before-define (#​19808) (Francesco Trotta)

Documentation

• 00e3e6a docs: add support for custom name parameter to includeIgnoreFile (#​19795) (루밀LuMir)
• 3aed075 docs: Update README (GitHub Actions Bot)
• a2f888d docs: enhance documentation with links and fix typos (#​19761) (루밀LuMir)
• 53c3235 docs: update to clarify prompt usage (#​19748) (Jennifer Davis)

Chores

• 5c114c9 chore: upgrade @​eslint/js@​9.29.0 (#​19851) (Milos Djermanovic)
• acf2201 chore: package.json update for @​eslint/js release (Jenkins)
• a806994 refactor: Remove eslintrc from flat config functionality (#​19833) (Nicholas C. Zakas)
• 152ed51 test: switch to flat config mode in code path analysis tests (#​19824) (Milos Djermanovic)
• b647239 chore: Update first-party dependencies faster with Renovate (#​19822) (Nicholas C. Zakas)
• 7abe42e refactor: SafeEmitter -> SourceCodeVisitor (#​19708) (Nicholas C. Zakas)
• e392895 perf: improve time complexity of getLocFromIndex (#​19782) (루밀LuMir)
• 0ed289c chore: remove accidentally committed file (#​19807) (Francesco Trotta)

v9.28.0

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Features

• b0674be feat: Customization of serialization for languageOptions (#​19760) (Nicholas C. Zakas)
• a95721f feat: Add --pass-on-unpruned-suppressions CLI option (#​19773) (Milos Djermanovic)
• bfd0e7a feat: support TypeScript syntax in no-use-before-define (#​19566) (Tanuj Kanti)
• 68c61c0 feat: support TS syntax in no-shadow (#​19565) (Nitin Kumar)
• 0f773ef feat: support TS syntax in no-magic-numbers (#​19561) (Nitin Kumar)
• c4a6b60 feat: add allowTypeAnnotation to func-style (#​19754) (sethamus)
• b03ad17 feat: add TypeScript support to prefer-arrow-callback (#​19678) (Tanuj Kanti)
• bc3c331 feat: ignore overloaded function declarations in func-style rule (#​19755) (sethamus)

Bug Fixes

• eea3e7e fix: Remove configured global variables from GlobalScope#implicit (#​19779) (Milos Djermanovic)
• a467de3 fix: update context.report types (#​19751) (Nitin Kumar)
• fd467bb fix: remove interopDefault to use jiti's default (#​19697) (sethamus)
• 72d16e3 fix: avoid false positive in no-unassigned-vars for declare module (#​19746) (Azat S.)
• 81c3c93 fix: curly types (#​19750) (Eli)

Documentation

• 3ec2082 docs: Nested arrays in files config entry (#​19799) (Nicholas C. Zakas)
• 89a65b0 docs: clarify how config arrays can apply to subsets of files (#​19788) (Shais Ch)
• 2ba8a0d docs: Add description of meta.namespace to plugin docs (#​19798) (Nicholas C. Zakas)
• 59dd7e6 docs: update func-style with examples (#​19793) (Tanuj Kanti)
• e9129e0 docs: add global scope's implicit field to Scope Manager docs (#​19770) (Milos Djermanovic)
• 52f5b7a docs: fix minor typos and add links (#​19743) (루밀LuMir)
• 00716a3 docs: upfront recommend against using the no-return-await rule (#​19727) (Mike DiDomizio)

Chores

• 175b7b8 chore: upgrade to @eslint/js@9.28.0 (#​19802) (Francesco Trotta)
• 844f5a6 chore: package.json update for @​eslint/js release (Jenkins)
• 62b1c1b chore: update globals to v16 (#​19791) (Nitin Kumar)
• e8a1cb8 chore: ignore jiti-v2.0 & jiti-v2.1 for renovate (#​19786) (Nitin Kumar)
• 43d3975 chore: Add Copilot Instructions file (#​19753) (Nicholas C. Zakas)
• 2dfb5eb test: update SourceCodeTraverser tests (#​19763) (Milos Djermanovic)
• 5bc21f9 chore: add *.code-workspace to .gitignore (#​19771) (루밀LuMir)
• f4fa40e refactor: NodeEventGenerator -> SourceCodeTraverser (#​19679) (Nicholas C. Zakas)
• 0f49329 refactor: use a service to emit warnings (#​19725) (Francesco Trotta)
• 20a9e59 chore: update dependency shelljs to ^0.10.0 (#​19740) (renovate[bot])

v9.27.0

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Features

• d71e37f feat: Allow flags to be set in ESLINT_FLAGS env variable (#​19717) (Nicholas C. Zakas)
• ba456e0 feat: Externalize MCP server (#​19699) (Nicholas C. Zakas)
• 07c1a7e feat: add allowRegexCharacters to no-useless-escape (#​19705) (sethamus)
• 7bc6c71 feat: add no-unassigned-vars rule (#​19618) (Jacob Bandes-Storch)
• ee40364 feat: convert no-array-constructor suggestions to autofixes (#​19621) (sethamus)
• 32957cd feat: support TS syntax in max-params (#​19557) (Nitin Kumar)

Bug Fixes

• 5687ce7 fix: correct mismatched removed rules (#​19734) (루밀LuMir)
• dc5ed33 fix: correct types and tighten type definitions in SourceCode class (#​19731) (루밀LuMir)
• de1b5de fix: correct service property name in Linter.ESLintParseResult type (#​19713) (Francesco Trotta)
• 60c3e2c fix: sort keys in eslint-suppressions.json to avoid git churn (#​19711) (Ron Waldon-Howe)
• 9da90ca fix: add allowReserved to Linter.ParserOptions type (#​19710) (Francesco Trotta)
• fbb8be9 fix: add info to ESLint.DeprecatedRuleUse type (#​19701) (Francesco Trotta)

Documentation

• 25de550 docs: Update description of frozen rules to mention TypeScript (#​19736) (Nicholas C. Zakas)
• bd5def6 docs: Clean up configuration files docs (#​19735) (Nicholas C. Zakas)
• 4d0c60d docs: Add Neovim to editor integrations (#​19729) (Maria José Solano)
• 71317eb docs: Update README (GitHub Actions Bot)
• 4c289e6 docs: Update README (GitHub Actions Bot)
• f0f0d46 docs: clarify that unused suppressions cause non-zero exit code (#​19698) (Milos Djermanovic)
• 8ed3273 docs: fix internal usages of ConfigData type (#​19688) (Francesco Trotta)
• eb316a8 docs: add fmt and check sections to Package.json Conventions (#​19686) (루밀LuMir)
• a3a2559 docs: fix wording in Combine Configs (#​19685) (Milos Djermanovic)
• c8d17e1 docs: Update README (GitHub Actions Bot)

Chores

• f8f1560 chore: upgrade @​eslint/js@​9.27.0 (#​19739) (Milos Djermanovic)
• ecaef73 chore: package.json update for @​eslint/js release (Jenkins)
• 596fdc6 chore: update dependency @​arethetypeswrong/cli to ^0.18.0 (#​19732) (renovate[bot])
• f791da0 chore: remove unbalanced curly brace from .editorconfig (#​19730) (Maria José Solano)
• e86edee refactor: Consolidate Config helpers (#​19675) (Nicholas C. Zakas)
• cf36352 chore: remove shared types (#​19718) (Francesco Trotta)
• f60f276 refactor: Easier RuleContext creation (#​19709) (Nicholas C. Zakas)
• 58a171e chore: update dependency @​eslint/plugin-kit to ^0.3.1 (#​19712) (renovate[bot])
• 3a075a2 chore: update dependency @​eslint/core to ^0.14.0 (#​19715) (renovate[bot])
• 44bac9d ci: run tests in Node.js 24 (#​19702) (Francesco Trotta)
• 35304dd chore: add missing funding field to packages (#​19684) (루밀LuMir)
• f305beb test: mock process.emitWarning to prevent output disruption (#​19687) (Francesco Trotta)

v9.26.0

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Features

• e9754e7 feat: add reportGlobalThis to no-shadow-restricted-names (#​19670) (sethamus)
• 0fa2b7a feat: add suggestions for eqeqeq rule (#​19640) (Nitin Kumar)
• dcbdcc9 feat: Add MCP server (#​19592) (Nicholas C. Zakas)
• 2dfd83e feat: add ignoreDirectives option in no-unused-expressions (#​19645) (sethamus)

Bug Fixes

• 96e84de fix: check cache file existence before deletion (#​19648) (sethamus)
• d683aeb fix: don't crash on tests with circular references in RuleTester (#​19664) (Milos Djermanovic)
• 9736d5d fix: add namespace to Plugin.meta type (#​19661) (Milos Djermanovic)
• 17bae69 fix: update RuleTester.run() type (#​19634) (Nitin Kumar)

Documentation

• dd98d63 docs: Update README (GitHub Actions Bot)
• c25e858 docs: Update README (GitHub Actions Bot)
• b2397e9 docs: Update README (GitHub Actions Bot)
• addd0a6 docs: fix formatting of unordered lists in Markdown (#​19660) (Milos Djermanovic)
• a21b38d docs: Update README (GitHub Actions Bot)
• c0721a7 docs: fix double space in command (#​19657) (CamWass)

Chores

• 5b247c8 chore: upgrade to @eslint/js@9.26.0 (#​19681) (Francesco Trotta)
• d6fa4ac chore: package.json update for @​eslint/js release (Jenkins)
• 0958690 chore: disambiguate internal types LanguageOptions and Rule (#​19669) (Francesco Trotta)
• f1c858e chore: fix internal type references to Plugin and Rule (#​19665) (Francesco Trotta)
• 40dd299 refactor: One-shot ESQuery selector analysis (#​19652) (Nicholas C. Zakas)
• 1cfd702 chore: update dependency @​eslint/json to ^0.12.0 (#​19656) (renovate[bot])

v9.25.1

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Bug Fixes

• cdc8e8c fix: revert directive detection in no-unused-expressions (#​19639) (sethamus)

Chores

• 1f2b057 chore: upgrade @​eslint/js@​9.25.1 (#​19642) (Milos Djermanovic)
• 771317f chore: package.json update for @​eslint/js release (Jenkins)

v9.25.0

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Features

• dcd95aa feat: support TypeScript syntax in no-empty-function rule (#​19551) (sethamus)
• 77d6d5b feat: support TS syntax in no-unused-expressions (#​19564) (Sweta Tanwar)
• 90228e5 feat: support JSRuleDefinition type (#​19604) (루밀LuMir)
• 59ba6b7 feat: add allowObjects option to no-restricted-properties (#​19607) (sethamus)
• db650a0 feat: support TypeScript syntax in no-invalid-this rule (#​19532) (Tanuj Kanti)
• 9535cff feat: support TS syntax in no-loop-func (#​19559) (Nitin Kumar)

Bug Fixes

• 910bd13 fix: nodeTypeKey not being used in NodeEventGenerator (#​19631) (StyleShit)

Documentation

• ca7a735 docs: update no-undef-init when not to use section (#​19624) (Tanuj Kanti)
• 1b870c9 docs: use eslint-config-xo in the getting started guide (#​19629) (Nitin Kumar)
• 5d4af16 docs: add types for multiple rule options (#​19616) (Tanuj Kanti)
• e8f8d57 docs: Update README (GitHub Actions Bot)
• a40348f docs: no-use-before-define tweaks (#​19622) (Kirk Waiblinger)
• 0ba3ae3 docs: Update README (GitHub Actions Bot)
• 865dbfe docs: ensure "learn more" deprecation links point to useful resource (#​19590) (Kirk Waiblinger)
• f80b746 docs: add known limitations for no-self-compare (#​19612) (Nitin Kumar)
• 865aed6 docs: Update README (GitHub Actions Bot)

Chores

• 88dc196 chore: upgrade @​eslint/js@​9.25.0 (#​19636) (Milos Djermanovic)
• 345288d chore: package.json update for @​eslint/js release (Jenkins)
• affe6be chore: upgrade trunk (#​19628) (sethamus)
• dd20cf2 test: fix no-loop-func test with duplicate variable reports (#​19610) (Milos Djermanovic)
• bd05397 chore: upgrade @eslint/* dependencies (#​19606) (Milos Djermanovic)
• 22ea18b chore: replace invalid int type with number inside JSDocs. (#​19597) (Arya Emami)

v9.24.0

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Features

• 556c25b feat: support loading TS config files using --experimental-strip-types (#​19401) (Arya Emami)
• 72650ac feat: support TS syntax in init-declarations (#​19540) (Nitin Kumar)
• 03fb0bc feat: normalize patterns to handle "./" prefix in files and ignores (#​19568) (Pixel998)
• 071dcd3 feat: support TS syntax in no-dupe-class-members (#​19558) (Nitin Kumar)
• cd72bcc feat: Introduce a way to suppress violations (#​19159) (Iacovos Constantinou)
• 2a81578 feat: support TS syntax in no-loss-of-precision (#​19560) (Nitin Kumar)
• 30ae4ed feat: add new options to class-methods-use-this (#​19527) (sethamus)
• b79ade6 feat: support TypeScript syntax in no-array-constructor (#​19493) (Tanuj Kanti)

Bug Fixes

• b23d1c5 fix: deduplicate variable names in no-loop-func error messages (#​19595) (Nitin Kumar)
• fb8cdb8 fix: use any[] type for context.options (#​19584) (Francesco Trotta)

Documentation

• f857820 docs: update documentation for --experimental-strip-types (#​19594) (Nikolas Schröter)
• 803e4af docs: simplify gitignore path handling in includeIgnoreFile section (#​19596) (Thomas Broyer)
• 6d979cc docs: Update README (GitHub Actions Bot)
• 82177e4 docs: Update README (GitHub Actions Bot)
• e849dc0 docs: replace existing var with const (#​19578) (Sweta Tanwar)
• 0c65c62 docs: don't pass filename when linting rule examples (#​19571) (Milos Djermanovic)
• 6be36c9 docs: Update custom-rules.md code example of fixer (#​19555) (Yifan Pan)

Build Related

• 366e369 build: re-enable Prettier formatting for package.json files (#​19569) (Francesco Trotta)

Chores

• ef67420 chore: upgrade @​eslint/js@​9.24.0 (#​19602) (Milos Djermanovic)
• 4946847 chore: package.json update for @​eslint/js release (Jenkins)
• a995acb chore: correct 'flter'/'filter' typo in package script (#​19587) (Josh Goldberg )
• b9a5efa test: skip symlink test on Windows (#​19503) (fisker Cheung)
• 46eea6d chore: remove Rule & FormatterFunction from shared/types.js (#​19556) (Nitin Kumar)
• bdcc91d chore: modify .editorconfig to keep parity with prettier config (#​19577) (Sweta Tanwar)
• 7790d83 chore: fix some typos in comment (#​19576) (todaymoon)
• 76064a6 test: ignore package-lock.json for eslint-webpack-plugin (#​19572) (Francesco Trotta)

v9.23.0

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Features

• 557a0d2 feat: support TypeScript syntax in no-useless-constructor (#​19535) (Josh Goldberg )
• 8320241 feat: support TypeScript syntax in default-param-last (#​19431) (Josh Goldberg )
• 833c4a3 feat: defineConfig() supports "flat/" config prefix (#​19533) (Nicholas C. Zakas)
• 4a0df16 feat: circular autofix/conflicting rules detection (#​19514) (Milos Djermanovic)
• be56a68 feat: support TypeScript syntax in class-methods-use-this (#​19498) (Josh Goldberg )

Bug Fixes

• 0e20aa7 fix: move deprecated RuleContext methods to subtype (#​19531) (Francesco Trotta)
• cc3bd00 fix: reporting variable used in catch block in no-useless-assignment (#​19423) (Tanuj Kanti)
• d46ff83 fix: no-dupe-keys false positive with proto setter (#​19508) (Milos Djermanovic)
• e732773 fix: navigation of search results on pressing Enter (#​19502) (Tanuj Kanti)
• f4e9c5f fix: allow RuleTester to test files inside node_modules/ (#​19499) (fisker Cheung)

Documentation

• 5405939 docs: show red underlines in TypeScript examples in rules docs (#​19547) (Milos Djermanovic)
• 48b53d6 docs: replace var with const in examples (#​19539) (Nitin Kumar)
• c39d7db docs: Update README (GitHub Actions Bot)
• a4f8760 docs: revert accidental changes (#​19542) (Francesco Trotta)
• 280128f docs: add copy button (#​19512) (xbinaryx)
• cd83eaa docs: replace var with const in examples (#​19530) (Nitin Kumar)
• 7ff0cde docs: Update README (GitHub Actions Bot)
• 996cfb9 docs: migrate sass to module system (#​19518) (xbinaryx)
• 17cb958 docs: replace var with let and const in rule examples (#​19515) (Tanuj Kanti)
• 83e24f5 docs: Replace var with let or const (#​19511) (Jenna Toff)
• a59d0c0 docs: Update docs for defineConfig (#​19505) (Nicholas C. Zakas)
• fe92927 docs: require-unicode-regexp add note for i flag and \w (#​19510) (Chaemin-Lim)

Build Related

• 2357edd build: exclude autogenerated files from Prettier formatting (#​19548) (Francesco Trotta)

Chores

• 0ac8ea4 chore: update dependencies for v9.23.0 release (#​19554) (Francesco Trotta)
• 20591c4 chore: package.json update for @​eslint/js release (Jenkins)
• 901344f chore: update dependency @​eslint/json to ^0.11.0 (#​19552) (renovate[bot])
• 5228383 chore: fix update-readme formatting (#​19544) (Milos Djermanovic)
• 5439525 chore: format JSON files in Trunk (#​19541) (Francesco Trotta)
• 75adc99 chore: enabled Prettier in Trunk (#​19354) (Josh Goldberg )
• 2395168 chore: added .git-blame-ignore-revs for Prettier via trunk fmt (#​19538) (Josh Goldberg )
• 129882d chore: formatted files with Prettier via trunk fmt (#​19355) (Josh Goldberg )
• 1738dbc chore: temporarily disable prettier in trunk (#​19537) (Josh Goldberg )
• dc854fd chore: update dependency shelljs to ^0.9.0 (#​19524) (renovate[bot])
• 5d57496 chore: fix some comments (#​19525) (jimmycathy)
• 9c5c6ee test: fix an assertion failure (#​19500) (fisker Cheung)
• 7a699a6 chore: remove formatting-related lint rules internally (#​19473) (Josh Goldberg )
• c99db89 test: replace WebdriverIO with Cypress (#​19465) (Pixel998)

v9.22.0

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Features

• 7ddb095 feat: Export defineConfig, globalIgnores (#​19487) (Nicholas C. Zakas)

Bug Fixes

• 19c0127 fix: improve message for no-console suggestions (#​19483) (Francesco Trotta)
• 49e624f fix: improve error message for falsy parsed JS AST (#​19458) (Josh Goldberg )

Documentation

• 86c5f37 docs: Update README (GitHub Actions Bot)
• fbdeff0 docs: Update README (GitHub Actions Bot)
• c9e8510 docs: generate deprecation notice in TSDoc comments from rule metadata (#​19461) (Francesco Trotta)
• 2f386ad docs: replace var with const in rule examples (#​19469) (Tanuj Kanti)
• 0e688e3 docs: Update README (GitHub Actions Bot)
• 06b596d docs: Restore the carrot to the position where the search input was lost (#​19459) (Amaresh S M)

Chores

• 97f788b chore: upgrade @​eslint/js@​9.22.0 (#​19489) (Milos Djermanovic)
• eed409a chore: package.json update for @​eslint/js release (Jenkins)
• f9a56d3 chore: upgrade eslint-scope@8.3.0 (#​19488) (Milos Djermanovic)

v9.21.0

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Features

• 418717f feat: introduce new deprecated types for rules (#​19238) (fnx)
• 5c5b802 feat: Add --ext CLI option (#​19405) (Milos Djermanovic)

Bug Fixes

• db5340d fix: update missing plugin message template (#​19445) (Milos Djermanovic)
• d8ffdd4 fix: do not exit process on rule crash (#​19436) (Francesco Trotta)

Documentation

• c5561ea docs: Update README (GitHub Actions Bot)
• 80b0485 docs: replace var with let and const in rule example (#​19434) (Tanuj Kanti)
• f67d5e8 docs: Update README (GitHub Actions Bot)
• 75afc61 docs: Update README (GitHub Actions Bot)
• 0636cab docs: Update Eleventy from v2 to v3 (#​19415) (Amaresh S M)
• dd7d930 docs: Update README (GitHub Actions Bot)

Chores

• a8c9a9f chore: update @eslint/eslintrc and @eslint/js (#​19453) (Francesco Trotta)
• 265e0cf chore: package.json update for @​eslint/js release (Jenkins)
• 3401b85 test: add test for Rule.ReportDescriptor type (#​19449) (Francesco Trotta)
• e497aa7 chore: update rewrite dependencies (#​19448) (Francesco Trotta)
• dab5478 chore: better error message for missing plugin in config (#​19402) (Tanuj Kanti)
• ebfe2eb chore: set js language for bug report issue config block (#​19439) (Josh Goldberg )
• 5fd211d test: processors can return subpaths (#​19425) (Milos Djermanovic)

v9.20.1

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Bug Fixes

• 274f054 fix: fix RuleContext type (#​19417) (Francesco Trotta)

Documentation

• fe3ccb2 docs: allow typing in search box while dropdown is open (#​19424) (Amaresh S M)
• 93c78a5 docs: Add instructions for pnpm compat (#​19422) (Nicholas C. Zakas)
• b476a93 docs: Fix Keyboard Navigation for Search Results (#​19416) (Amaresh S M)
• ccb60c0 docs: Update README (GitHub Actions Bot)

v9.20.0

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Features

• e89a54a feat: change behavior of inactive flags (#​19386) (Milos Djermanovic)

Bug Fixes

• 91d4d9f fix: Bring types in sync with @​eslint/core (#​19157) (Nicholas C. Zakas)
• fa25c7a fix: Emit warning when empty config file is used (#​19399) (Nicholas C. Zakas)
• 31a9fd0 fix: Clearer error message for wrong plugin format (#​19380) (Nicholas C. Zakas)
• 61d99e3 fix: Better error message for unserializable parser (#​19384) (Nicholas C. Zakas)
• db1b9a6 fix: Ensure module scope is checked for references in consistent-this (#​19383) (Nicholas C. Zakas)
• 8bcd820 fix: arrow-body-style crash with single-token body (#​19379) (Milos Djermanovic)

Documentation

• b7012c8 docs: rewrite examples with var using let and const (#​19407) (Mueez Javaid Hashmi)
• 6406376 docs: Update README (GitHub Actions Bot)
• 350f2b9 docs: rewrite some examples with var using let and const (#​19404) (Mueez Javaid Hashmi)
• 93c325a docs: rewrite examples with var using let and const (#​19398) (Mueez Javaid Hashmi)
• 56ff404 docs: replace var with let or const in rules docs (#​19396) (Daniel Harbrueger)
• 4053226 docs: change sourceType in no-eval examples (#​19393) (Milos Djermanovic)
• 1324af0 docs: replace var with let and const in rules docs (#​19392) (Daniel Harbrueger)
• 8b87e00 docs: replace var with const and let in rules (#​19389) (Tanuj Kanti)
• 758c66b docs: Explain what frozen rules mean (#​19382) (Nicholas C. Zakas)
• 0ef8bb8 docs: additional checks for rule examples (#​19358) (Milos Djermanovic)
• 58ab2f6 docs: fix order of installation steps in getting started (#​19326) (Tanuj Kanti)

Chores

• 979097a chore: upgrade @​eslint/js@​9.20.0 (#​19412) (Francesco Trotta)
• 031734e chore: package.json update for @​eslint/js release (Jenkins)
• d4c47c3 test: avoid empty config warning in test output (#​19408) (Milos Djermanovic)
• 67dd82a chore: update dependency @​eslint/json to ^0.10.0 (#​19387) (renovate[bot])
• 15ac0e1 chore: add permissions: read-all to stale.yml workflow (#​19374) (Josh Goldberg )

v9.19.0

Compare Source

Features

• 1637b8e feat: add --report-unused-inline-configs (#​19201) (Josh Goldberg )

Bug Fixes

• aae6717 fix: sync rule type header comments automatically (#​19276) (Francesco Trotta)

Documentation

• cfea9ab docs: Clarify overrideConfig option (#​19370) (Nicholas C. Zakas)
• 2b84f66 docs: Update README (#​19362) (Nicholas C. Zakas)
• 044f93c docs: clarify frozen rule description (#​19351) (Pavel)
• 797ee7c docs: fix Bluesky links (#​19368) (Milos Djermanovic)
• 81a9c0e docs: Update README (GitHub Actions Bot)
• 093fb3d docs: replace var with let and const in rule examples (#​19365) (Tanuj Kanti)
• 417de32 docs: replace var with const in rule examples (#​19352) (jj)
• 17f2aae docs: update getting-started config to match default generated config (#​19308) (0xDev)
• 8a0a5a8 docs: better global ignores instruction (#​19297) (Jacopo Marrone)
• 6671a2c docs: Update README (GitHub Actions Bot)
• e39d3f2 docs: fix divider for rule category (#​19264) (Tanuj Kanti)
• e0cf53f docs: fix search result box position for small screens (#​19328) (Tanuj Kanti)
• f92a680 docs: replace var with let or const in rule examples (#​19331) (Ravi Teja Kolla)
• b04b84b docs: revert accidental changes in TS config files docs (#​19336) (Francesco Trotta)

Chores

• 9b9cb05 chore: upgrade @​eslint/js@​9.19.0 (#​19371) (Milos Djermanovic)
• 58560e7 chore: package.json update for @​eslint/js release (Jenkins)
• 2089707 test: fix failing test in Node.js v22.13.0 (#​19345) (Francesco Trotta)

v9.18.0

Compare Source

Features

• e84e6e2 feat: Report allowed methods for no-console rule (#​19306) (Anna Bocharova)
• 8efc2d0 feat: unflag TypeScript config files (#​19266) (Francesco Trotta)
• 87a9352 feat: check imports and class names in no-shadow-restricted-names (#​19272) (Milos Djermanovic)

Bug Fixes

• da768d4 fix: correct overrideConfigFile type (#​19289) (Francesco Trotta)

Documentation

• d9c23c5 docs: replace var with const in rule examples (#​19325) (Tanuj Kanti)
• 8e1a898 docs: add tabs to cli code blocks (#​18784) (Jay)
• f3aeefb docs: rewrite using let and const in rule examples (#​19320) (PoloSpark)
• 0b680b3 docs: Update README (GitHub Actions Bot)
• 98c86a9 docs: Edit this page button link to different branches (#​19228) (Tanuj Kanti)
• 6947901 docs: remove hardcoded edit link (#​19323) (Milos Djermanovic)
• 03f2f44 docs: rewrite var with const in rules examples (#​19317) (Thiago)
• 26c3003 docs: Clarify dangers of eslint:all (#​19318) (Nicholas C. Zakas)
• c038257 docs: add eqeqeq in related rules to no-eq-null (#​19310) (루밀LuMir)
• 89c8fc5 docs: rewrite examples with var using let and const (#​19315) (Amaresh S M)
• db574c4 docs: add missing backticks to no-void (#​19313) (루밀LuMir)
• 8d943c3 docs: add missing backticks to default-case-last (#​19311) (루밀LuMir)
• 36ef8bb docs: rewrite examples with var using let and const (#​19298) (Amaresh S M)
• 1610c9e docs: add missing backticks to no-else-return (#​19309) (루밀LuMir)
• df409d8 docs: Update README (GitHub Actions Bot)
• 2e84213 docs: Fix Horizontal Scroll Overflow in Rule Description on Mobile View (#​19304) (Amaresh S M)
• 6e7361b docs: replace var with let and const in rule example (#​19302) (Tanuj Kanti)
• 069af5e docs: rewrite var using const in rule examples (#​19303) (Kim GyeonWon)
• 064e35d docs: remove 'I hope to' comments from scope-manager-interface (#​19300) (Josh Goldberg )
• 8e00305 docs: replace var with const in rule examples (#​19299) (Tanuj Kanti)
• a559009 docs: Add warning about extending core rules (#​19295) (Nicholas C. Zakas)
• 0bfdf6c docs: Update README (GitHub Actions Bot)
• ce0b9ff docs: add navigation link for code explorer (#​19285) (Tanuj Kanti)
• e255cc9 docs: add bluesky icon to footer (#​19290) (Tanuj Kanti)
• 5d64851 docs: remove outdated info about environments (#​19296) (Francesco Trotta)
• eec01f0 docs: switch rule examples config format to languageOptions (#​19277) (Milos Djermanovic)
• b36ca0a docs: Fixing Focus Order by Rearranging Element Sequence (#​19241) (Amaresh S M)
• d122c8a docs: add missing backticks to sort-imports (#​19282) (루밀LuMir)
• 0367a70 docs: update custom parser docs (#​19288) (Francesco Trotta)
• 8c07ebb docs: add border-radius to hX:target selector styles (#​19270) (루밀LuMir)
• eff7c57 docs: add limitation section in no-loop-func (#​19287) (Tanuj Kanti)
• 5db226f docs: add missing backticks in various parts of the documentation (#​19269) (루밀LuMir)
• 789edbb docs: Update README (GitHub Actions Bot)
• 613c06a docs: mark rules that are frozen with (#​19231) (Amaresh S M)
• 43172ec docs: Update README (GitHub Actions Bot)
• ac8b3c4 docs: fix description of overrideConfigFile option (#​19262) (Milos Djermanovic)
• bbb9b46 docs: Update README (GitHub Actions Bot)
• 995b492 docs: fix inconsistent divider in rule categories box (#​19249) (Tanuj Kanti)
• f76d05d docs: Refactor search result handling with better event listener cleanup (#​19252) (Amaresh S M)
• c5f3d7d docs: Update README (GitHub Actions Bot)

Chores

• c52be85 chore: upgrade to @eslint/js@9.18.0 (#​19330) (Francesco Trotta)
• 362099c chore: package.json update for @​eslint/js release (Jenkins)
• 495aa49 chore: extract package name from package.json for public interface (#​19314) (루밀LuMir)
• 6fe0e72 chore: update dependency @​eslint/json to ^0.9.0 (#​19263) (renovate[bot])

v9.17.0

Compare Source

Features

• eed91d1 feat: add suggestions to no-unused-vars (#​18352) (Tanuj Kanti)

Bug Fixes

• 67d683d fix: fix crash when message.fix is nullish (#​19168) (ntnyq)
• c618707 fix: ignore vars with non-identifier references in no-useless-assignment (#​19200) (YeonJuan)

Documentation

• 3c22d2a docs: update yoda to Yoda in yoda.md for consistency (#​19230) (루밀LuMir)
• e0a2203 docs: add missing backticks to no-sequences (#​19233) (루밀LuMir)
• 4cc4881 docs: Update README (GitHub Actions Bot)
• 3db6fdf docs: [no-await-in-loop] expand on benefits and inapplicability (#​19211) (Kirk Waiblinger)
• bf2a4f6 docs: add missing backticks to func-style (#​19227) (루밀LuMir)
• ba098bd docs: add missing header to prefer-spread (#​19224) (루밀LuMir)
• b607ae6 docs: update description of no-param-reassign (#​19220) (루밀LuMir)
• 1eb424d docs: add missing backticks to prefer-destructuring (#​19223) (루밀LuMir)
• 85998d1 docs: add missing backticks to no-unneeded-ternary (#​19222) (루밀LuMir)
• b75b32c docs: add missing backticks to no-new-func (#​19219) (루밀LuMir)
• a7700bc docs: add missing backticks to id-length (#​19217) (루밀LuMir)
• e2bb429 docs: add missing backticks to complexity.md (#​19214) (루밀LuMir)
• 045d716 docs: add missing ) to id-denylist (#​19213) (루밀LuMir)
• 7fe4114 docs: Update README (GitHub Actions Bot)
• c743ba6 docs: add CSS language to no-restricted-syntax (#​19208) (Milos Djermanovic)
• 1416d70 docs: add missing backticks to eqeqeq (#​19207) (루밀LuMir)
• b950c1b docs: add missing backticks to prefer-object-spread (#​19206) (루밀LuMir)
• 8a941cb docs: update docs and description of require-unicode-regexp (#​19205) (루밀LuMir)
• cbab228 docs: Update README (GitHub Actions Bot)
• f2257ce docs: update comments and description of no-script-url (#​19203) (루밀LuMir)
• 365f0f4 docs: add missing backtick to default-case-last (#​19202) (루밀LuMir)
• e6b84f5 docs: add missing punctuation in document (#​19161) (루밀LuMir)
• c88708e docs: replace quote with backtick in description of for-direction (#​19199) (루밀LuMir)
• a76f233 docs: use higher contrast color tokens for code comments (#​19187) (Josh Goldberg )
• db19502 docs: Update README (GitHub Actions Bot)

Chores

• cc243c9 chore: upgrade to @eslint/js@9.17.0 (#​19242) (Francesco Trotta)
• 84c5787 chore: package.json update for @​eslint/js release (Jenkins)
• 4c4f53b chore: add missing backticks to flags.js (#​19226) (루밀LuMir)
• 4b3132c chore: update dependency eslint-plugin-expect-type to ^0.6.0 (#​19221) (renovate[bot])
• 9bf2204 chore: add type definitions for the eslint-config-eslint package (#​19050) (Arya Emami)
• ee8c220 chore: fix incorrect name property in integration-tutorial-code (#​19218) (루밀LuMir)
• cca801d chore: Upgrade cross-spawn to 7.0.6 (#​19185) (folortin)

v9.16.0

Compare Source

Features

• 8f70eb1 feat: Add ignoreComputedKeys option in sort-keys rule (#​19162) (Milos Djermanovic)

Documentation

• 9eefc8f docs: fix typos in use-isnan (#​19190) (루밀LuMir)
• 0c8cea8 docs: switch the order of words in no-unreachable (#​19189) (루밀LuMir)
• 0c19417 docs: add missing backtick to no-async-promise-executor (#​19188) (루밀LuMir)
• 8df9276 docs: add backtick in -0 in description of no-compare-neg-zero (#​19186) (루밀LuMir)
• 7e16e3f docs: fix caseSensitive option's title of sort-keys (#​19183) (Tanuj Kanti)
• 0c6b842 docs: fix typos in migration-guide.md (#​19180) (루밀LuMir)
• 353266e docs: fix a typo in debug.md (#​19179) (루밀LuMir)
• 5ff318a docs: delete unnecessary horizontal rule(---) in nodejs-api (#​19175) (루밀LuMir)
• 576bcc5 docs: mark more rules as handled by TypeScript (#​19164) (Tanuj Kanti)
• 742d054 docs: note that no-restricted-syntax can be used with any language (#​19148) (Milos Djermanovic)

Chores

• feb703b chore: upgrade to @eslint/js@9.16.0 (#​19195) (Francesco Trotta)
• df9bf95 chore: package.json update for @​eslint/js release (Jenkins)
• f831893 chore: add type for ignoreComputedKeys option of sort-keys (#​19184) (Tanuj Kanti)
• 3afb8a1 chore: update dependency @​eslint/json to ^0.8.0 (#​19177) (Milos Djermanovic)
• 1f77c53 chore: add repository.directory property to package.json (#​19165) (루밀LuMir)
• d460594 chore: update dependency @​arethetypeswrong/cli to ^0.17.0 (#​19147) (renovate[bot])
• 45cd4ea refactor: update default options in rules (#​19136) (Milos Djermanovic)

v9.15.0

Compare Source

Features

• 01557ce feat: Implement Language#normalizeLanguageOptions() (#​19104) (Nicholas C. Zakas)
• 2edc0e2 feat: add meta.defaultOptions (#​17656) (Josh Goldberg )
• bdec50e feat: fix no-useless-computed-key false negative with __proto__ (#​19123) (Milos Djermanovic)
• 3087c9e feat: add meta object to @eslint/js plugin (#​19095) (Francesco Trotta)

Bug Fixes

• fd33f13 fix: update types for no-restricted-imports rule (#​19060) (Nitin Kumar)
• bd35098 fix: switch away from Node.js node:assert and AssertionError (#​19082) (Josh Goldberg )
• 9db5b15 fix: unsafe report for no-lonely-if (#​19087) (Abraham Guo)
• 68fa497 fix: ignore files on a different drive on Windows (#​19069) (Francesco Trotta)
• 4ce625a fix: upgrade @​humanwhocodes/retry@​0.4.1 to avoid debug logs (#​19102) (Milos Djermanovic)

Documentation

• d927920 docs: fix styles in no-js mode (#​18916) (Tanuj Kanti)
• 09bc2a8 docs: Update README (GitHub Actions Bot)
• 39089c8 docs: add no-useless-computed-key examples with object patterns (#​19109) (Milos Djermanovic)
• 895c60f docs: add missing messageId property and suggestion properties (#​19122) (fnx)
• 298625e docs: Change CLI -c to use flat config (#​19103) (Nicholas C. Zakas)
• 522d8a3 docs: add deprecation on indent, quotes and semi rule types (#​19090) (Marco Pasqualetti)

Chores

• 2967d91 chore: upgrade @​eslint/js@​9.15.0 (#​19133) (Milos Djermanovic)
• b441bee chore: package.json update for @​eslint/js release (Jenkins)
• 7d6bf4a chore: upgrade @​eslint/core@​0.9.0 (#​19131) (Milos Djermanovic)
• 902e707 chore: upgrade @​eslint/plugin-kit@​0.2.3 (#​19130) (Milos Djermanovic)
• 5ff6c1d chore: bump cross-spawn (#​19125) (Ian Bobinac)
• cceccc7 chore: update dependency @​eslint/json to ^0.6.0 (#​19117) (renovate[bot])
• 0da3f73 chore: update algolia referrer (#​19114) (Strek)
• 4f08332 ci: unpin trunk-io/trunk-action (#​19108) (Francesco Trotta)
• 6b75683 perf: optimize text-table by replacing regex with trimEnd (#​19061) (Nitin Kumar)

v9.14.0

Compare Source

Features

• 3fa009f feat: add support for Import Attributes and RegExp Modifiers (#​19076) (Milos Djermanovic)
• b0faee3 feat: add types for the @eslint/js package (#​19010) (Nitin Kumar)

Bug Fixes

• 24d0172 fix: enable retry concurrency limit for readFile() (#​19077) (Nicholas C. Zakas)
• b442067 fix: Don't crash when directory is deleted during traversal. (#​19067) (Nicholas C. Zakas)
• d474443 fix: avoid call stack overflow while processing globs (#​19035) (Livia Medeiros)

Documentation

• 151c965 docs: update context.languageOptions.parser description (#​19084) (Nitin Kumar)
• dc34f94 docs: Update README (GitHub Actions Bot)
• f16e846 docs: Update README (GitHub Actions Bot)
• ee0a77e docs: change link from @​types/eslint to lib/types (#​19049) (Karl Horky)
• 50f03a1 docs: Clarify global ignores in config migration guide (#​19032) (Milos Djermanovic)

Build Related

• 37c9177 build: update @wdio/* dependencies (#​19068) (Francesco Trotta)
• 35a8858 build: exclude flawed dendency versions (#​19065) (Francesco Trotta)

Chores

• f36cb16 chore: upgrade @​eslint/js@​9.14.0 (#​19086) (Milos Djermanovic)
• 28be447 chore: package.json update for @​eslint/js release (Jenkins)
• f48a2a0 test: add no-invalid-regexp tests with RegExp Modifiers (#​19075) (Milos Djermanovic)
• 425202e perf: Fix caching in config loaders (#​19042) (Milos Djermanovic)
• 3d44b3c ci: run tests in Node.js 23 (#​19055) (Francesco Trotta)
• 7259627 test: ensure tmp directory cleanup in check-emfile-handling.js (#​19036) (Livia Medeiros)

v9.13.0

Compare Source

Features

• 381c32b feat: Allow languages to provide defaultLanguageOptions (#​19003) (Milos Djermanovic)
• bf723bd feat: Improve eslintrc warning message (#​19023) (Milos Djermanovic)
• 1def4cd feat: drop support for jiti v1.21 (#​18996) (Francesco Trotta)
• f879be2 feat: export ESLint.defaultConfig (#​18983) (Nitin Kumar)

Bug Fixes

• 78836d4 fix: update the complexity rule type (#​19027) (Nitin Kumar)
• 064c8b6 fix: update rule types (#​18925) (Nitin Kumar)

Documentation

• abdbfa8 docs: mark LintMessage#nodeType as deprecated (#​19019) (Nitin Kumar)
• 19e68d3 docs: update deprecated rules type definitions (#​19018) (Nitin Kumar)
• 7dd402d docs: Update examples of passing multiple values to a CLI option (#​19006) (Milos Djermanovic)
• 5dcbc51 docs: Add example with side-effect imports to no-restricted-imports (#​18997) (Milos Djermanovic)
• 1ee87ca docs: Update README (GitHub Actions Bot)
• 2c3dbdc docs: Use prerendered sponsors for README (#​18988) (Milos Djermanovic)

Chores

• 68d2d9d chore: upgrade to @eslint/js@9.13.0 and @eslint/core@^0.7.0 (#​19034) (Francesco Trotta)
• 2211f0a chore: package.json update for @​eslint/js release (Jenkins)
• c7abaef perf: using Node.js compile cache (#​19012) (唯然)
• 1d7c077 chore: add pkg.type "commonjs" (#​19011) (唯然)
• 468e3bd test: fix ESLint tests (#​19021) (Francesco Trotta)
• ed4635f ci: upgrade knip@5.32.0 (#​18992) (Milos Djermanovic)
• efad767 chore: remove unused ignore dependency (#​18993) (Amaresh S M)

v9.12.0

Compare Source

Features

• 5a6a053 feat: update to jiti v2 (#​18954) (Arya Emami)
• 17a07fb feat: Hooks for test cases (RuleTester) (#​18771) (Anna Bocharova)
• 2ff0e51 feat: Implement alternate config lookup (#​18742) (Nicholas C. Zakas)
• 2d17453 feat: Implement modified cyclomatic complexity (#​18896) (Dmitry Pashkevich)

Bug Fixes

• ea380ca fix: Upgrade retry to avoid EMFILE errors (#​18986) (Nicholas C. Zakas)
• fdd6319 fix: Issues with type definitions (#​18940) (Arya Emami)

Documentation

• ecbd522 docs: Mention code explorer (#​18978) (Nicholas C. Zakas)
• 7ea4ecc docs: Clarifying the Use of Meta Objects (#​18697) (Amaresh S M)
• d3e4b2e docs: Clarify how to exclude .js files (#​18976) (Milos Djermanovic)
• 57232ff docs: Mention plugin-kit in language docs (#​18973) (Nicholas C. Zakas)
• b80ed00 docs: Update README (GitHub Actions Bot)
• cb69ab3 docs: Update README (GitHub Actions Bot)
• 7fb0d95 docs: Update README (GitHub Actions Bot)
• 493348a docs: Update README (GitHub Actions Bot)
• 87a582c docs: fix typo in id-match rule (#​18944) (Jay)

Chores

• 555aafd chore: upgrade to @eslint/js@9.12.0 (#​18987) (Francesco Trotta)
• 873ae60 chore: package.json update for @​eslint/js release (Jenkins)
• d0a5414 refactor: replace strip-ansi with native module (#​18982) (Cristopher)
• b827029 chore: Enable JSON5 linting (#​18979) (Milos Djermanovic)
• 8f55ca2 chore: Upgrade espree, eslint-visitor-keys, eslint-scope (#​18962) (Nicholas C. Zakas)
• c1a2725 chore: update dependency mocha to ^10.7.3 (#​18945) (Milos Djermanovic)

v9.11.1

Compare Source

Bug Fixes

• 20fd916 fix: add @eslint/core, @types/estree, & @types/json-schema deps (#​18938) (Nitin Kumar)
• 2738322 fix: add missing types for require-atomic-updates rule (#​18937) (Kristóf Poduszló)
• d71ff30 fix: add missing types for object-shorthand rule (#​18935) (Kristóf Poduszló)
• 561cadc fix: add missing types for no-unsafe-negation rule (#​18932) (Kristóf Poduszló)
• 8843656 fix: add missing types for no-underscore-dangle rule (#​18931) (Kristóf Poduszló)
• 92cde5c fix: add missing types for no-shadow rule (#​18930) (Kristóf Poduszló)
• b3cbe11 fix: add missing types for no-sequences rule (#​18929) (Kristóf Poduszló)
• 976f77f fix: add missing types for no-unused-expressions rule (#​18933) (Kristóf Poduszló)

Documentation

• 3eff709 docs: replace deprecated Linter.FlatConfig type with Linter.Config (#​18941) (Carlos Meira)

Chores

• df4a859 chore: upgrade @​eslint/js@​9.11.1 (#​18943) (Milos Djermanovic)
• 36d8095 chore: package.json update for @​eslint/js release (Jenkins)

v9.11.0

Compare Source

Features

• ec30c73 feat: add "eslint/universal" to export Linter (#​18883) (唯然)
• c591da6 feat: Add language to types (#​18917) (Nicholas C. Zakas)
• 492eb8f feat: limit the name given to ImportSpecifier in id-length (#​18861) (Tanuj Kanti)
• 19c6856 feat: Add no-useless-constructor suggestion (#​18799) (Jordan Thomson)
• a48f8c2 feat: add type FormatterFunction, update LoadedFormatter (#​18872) (Francesco Trotta)

Bug Fixes

• 5e5f39b fix: add missing types for no-restricted-exports rule (#​18914) (Kristóf Poduszló)
• 8f630eb fix: add missing types for no-param-reassign options (#​18906) (Kristóf Poduszló)
• d715781 fix: add missing types for no-extra-boolean-cast options (#​18902) (Kristóf Poduszló)
• 2de5742 fix: add missing types for no-misleading-character-class options (#​18905) (Kristóf Poduszló)
• c153084 fix: add missing types for no-implicit-coercion options (#​18903) (Kristóf Poduszló)
• fa11b2e fix: add missing types for no-empty-function options (#​18901) (Kristóf Poduszló)
• a0deed1 fix: add missing types for camelcase options (#​18897) (Kristóf Poduszló)

Documentation

• e4e5709 docs: correct prefer-object-has-own type definition comment (#​18924) (Nitin Kumar)
• 91cbd18 docs: add unicode abbreviations in no-irregular-whitespace rule (#​18894) (Alix Royere)
• 59cfc0f docs: clarify resultsMeta in LoadedFormatter type (#​18881) (Milos Djermanovic)
• adcc50d docs: Update README (GitHub Actions Bot)
• 4edac1a docs: Update README (GitHub Actions Bot)

Build Related

• 959d360 build: Support updates to previous major versions (#​18871) (Milos Djermanovic)

Chores

• ca21a64 chore: upgrade @​eslint/js@​9.11.0 (#​18927) (Milos Djermanovic)
• a10f90a chore: package.json update for @​eslint/js release (Jenkins)
• e4e02cc refactor: Extract processor logic into ProcessorService (#​18818) (Nicholas C. Zakas)
• 6d4484d chore: updates for v8.57.1 release (Jenkins)
• 71f37c5 refactor: use optional chaining when validating config rules (#​18893) (lucasrmendonca)
• 2c2805f chore: Add MR note to all templates (#​18892) (Nicholas C. Zakas)
• 7b852ce refactor: use Directive class from @eslint/plugin-kit (#​18884) (Milos Djermanovic)
• d594ddd chore: update dependency @​eslint/core to ^0.6.0 (#​18863) (renovate[bot])
• 78b2421 chore: Update change.yml (#​18882) (Nicholas C. Zakas)
• a416f0a chore: enable $ExpectType comments in .ts files (#​18869) (Francesco Trotta)

v9.10.0

Compare Source

Features

• 301b90d feat: Add types (#​18854) (Nicholas C. Zakas)
• bcf0df5 feat: limit namespace import identifier in id-length rule (#​18849) (ChaedongIm)
• 45c18e1 feat: add requireFlag option to require-unicode-regexp rule (#​18836) (Brett Zamir)
• 183b459 feat: add error message for duplicate flags in no-invalid-regexp (#​18837) (Tanuj Kanti)
• c69b406 feat: report duplicate allowed flags in no-invalid-regexp (#​18754) (Tanuj Kanti)

Documentation

• bee0e7a docs: update README (#​18865) (Milos Djermanovic)
• 5d80b59 docs: specify that ruleId can be null in custom formatter docs (#​18857) (Milos Djermanovic)
• 156b1c3 docs: Update README (GitHub Actions Bot)
• f6fdef9 docs: Update README (GitHub Actions Bot)
• a20c870 docs: Update README (GitHub Actions Bot)
• 90e699b docs: Update README (GitHub Actions Bot)

Chores

• 24c3ff7 chore: upgrade to @​eslint/js@​9.10.0 (#​18866) (Francesco Trotta)
• 1ebdde1 chore: package.json update for @​eslint/js release (Jenkins)
• e8fc5bd chore: update dependency @​eslint/core to ^0.5.0 (#​18848) (renovate[bot])
• 343f992 refactor: don't use node.value when removing unused directives (#​18835) (Milos Djermanovic)
• 3db18b0 refactor: Extract FileContext into class (#​18831) (Nicholas C. Zakas)
• 931d650 refactor: Use @​eslint/plugin-kit (#​18822) (Nicholas C. Zakas)
• ed5cf0c chore: update dependency @​eslint/json to ^0.4.0 (#​18829) (Milos Djermanovic)
• d1f0831 chore: added missing ids (#​18817) (Strek)
• ec92813 refactor: Config class (#​18763) (Nicholas C. Zakas)

v9.9.1

Compare Source

Bug Fixes

• 9bde90c fix: add logic to handle fixTypes in lintText() (#​18736) (Amaresh S M)

Documentation

• 4840930 docs: Update README with version support and clean up content (#​18804) (Nicholas C. Zakas)
• f61f40d docs: Update globals examples (#​18805) (Nicholas C. Zakas)
• 241fcea docs: Use and define languages (#​18795) (Nicholas C. Zakas)
• 5dbdd63 docs: eslint-plugin-markdown -> @​eslint/markdown (#​18797) (Nicholas C. Zakas)
• c6c8ddd docs: update links to eslint-visitor-keys repo (#​18796) (Francesco Trotta)
• f981d05 docs: Update README (GitHub Actions Bot)
• b516974 docs: update links to eslint/js repo (#​18781) (Francesco Trotta)
• fb7a3f5 docs: update note for package managers (#​18779) (Jay)

Chores

• b0c34d0 chore: upgrade to @​eslint/js@​9.9.1 (#​18809) (Francesco Trotta)
• cd5a0da chore: package.json update for @​eslint/js release (Jenkins)
• e112642 refactor: Extract parsing logic from Linter (#​18790) (Nicholas C. Zakas)
• 0f68a85 chore: use eslint-plugin-yml on yaml files only (#​18801) (Milos Djermanovic)
• f8d1b3c chore: update dependencies for browser tests (#​18794) (Christian Bromann)
• aed2624 chore: update dependency @​eslint/config-array to ^0.18.0 (#​18788) (renovate[bot])
• 5c29128 chore: update dependency @​eslint/core to ^0.4.0 (#​18789) (renovate[bot])
• 5d66fb2 chore: migrate linting workflow to use trunk check meta-linter (#​18643) (Chris Clearwater)
• bf96855 chore: add ids to github issue templates (#​18775) (Strek)

v9.9.0

Compare Source

Features

• 41d0206 feat: Add support for TS config files (#​18134) (Arya Emami)
• 3a4eaf9 feat: add suggestion to require-await to remove async keyword (#​18716) (Dave)

Documentation

• 9fe068c docs: how to author plugins with configs that extend other configs (#​18753) (Alec Gibson)
• 48117b2 docs: add version support page in the side navbar (#​18738) (Amaresh S M)
• fec2951 docs: add version support page to the dropdown (#​18730) (Amaresh S M)
• 38a0661 docs: Fix typo (#​18735) (Zaina Al Habash)
• 3c32a9e docs: Update yarn command for creating ESLint config (#​18739) (Temitope Ogunleye)
• f9ac978 docs: Update README (GitHub Actions Bot)

Chores

• 461b2c3 chore: upgrade to @eslint/js@9.9.0 (#​18765) (Francesco Trotta)
• 59dba1b chore: package.json update for @​eslint/js release (Jenkins)
• fea8563 chore: update dependency @​eslint/core to ^0.3.0 (#​18724) (renovate[bot])
• aac191e chore: update dependency @​eslint/json to ^0.3.0 (#​18760) (renovate[bot])
• b97fa05 chore: update wdio dependencies for more stable tests (#​18759) (Christian Bromann)

v9.8.0

Compare Source

Features

• 13d0bd3 feat: Add and use SourceCode#getLoc/getRange (#​18703) (Nicholas C. Zakas)

Bug Fixes

• ab0ff27 fix: Throw error when invalid flags passed (#​18705) (Nicholas C. Zakas)
• 70dc803 fix: basePath directory can never be ignored (#​18711) (Milos Djermanovic)

Documentation

• 282df1a docs: Add system theme option (#​18617) (Amaresh S M)
• 53b1ff0 docs: Debug config docs (#​18698) (Nicholas C. Zakas)
• a7016a5 docs: fix search input stylings (#​18682) (Amaresh S M)

Build Related

• 4514424 build: Enable JSON linting (#​18681) (Nicholas C. Zakas)

Chores

• deee448 chore: upgrade to @eslint/js@9.8.0 (#​18720) (Francesco Trotta)
• 4aaf2b3 chore: package.json update for @​eslint/js release (Jenkins)
• 8e1a627 chore: update dependency @​eslint/core to ^0.2.0 (#​18700) (renovate[bot])

v9.7.0

Compare Source

Features

• 7bd9839 feat: add support for es2025 duplicate named capturing groups (#​18630) (Yosuke Ota)
• 1381394 feat: add regex option in no-restricted-imports (#​18622) (Nitin Kumar)

Bug Fixes

• 14e9f81 fix: destructuring in catch clause in no-unused-vars (#​18636) (Francesco Trotta)

Documentation

• 9f416db docs: Add Powered by Algolia label to the search. (#​18633) (Amaresh S M)
• c8d26cb docs: Open JS Foundation -> OpenJS Foundation (#​18649) (Milos Djermanovic)
• 6e79ac7 docs: loadESLint does not support option cwd (#​18641) (Francesco Trotta)

Chores

• 793b718 chore: upgrade @​eslint/js@​9.7.0 (#​18680) (Francesco Trotta)
• 7ed6f9a chore: package.json update for @​eslint/js release (Jenkins)
• 7bcda76 refactor: Add type references (#​18652) (Nicholas C. Zakas)
• 51bf57c chore: add tech sponsors through actions (#​18624) (Strek)
• 6320732 refactor: don't use parent property in NodeEventGenerator (#​18653) (Milos Djermanovic)
• 9e6d640 refactor: move "Parsing error" prefix adding to Linter (#​18650) (Milos Djermanovic)

v9.6.0

Compare Source

Features

• e2b16e2 feat: Implement feature flags (#​18516) (Nicholas C. Zakas)
• 8824aa1 feat: add ecmaVersion: 2025, parsing duplicate named capturing groups (#​18596) (Milos Djermanovic)

Bug Fixes

• 1613e2e fix: Allow escaping characters in config patterns on Windows (#​18628) (Milos Djermanovic)
• 21d3766 fix: no-unused-vars include caught errors pattern in report message (#​18609) (Kirk Waiblinger)
• d7a7736 fix: improve no-unused-vars message on unused caught errors (#​18608) (Kirk Waiblinger)
• f9e95d2 fix: correct locations of invalid /* eslint */ comments (#​18593) (Milos Djermanovic)

Documentation

• 13dbecd docs: Limit search to just docs (#​18627) (Nicholas C. Zakas)
• 375227f docs: Update getting-started.md - add pnpm to init eslint config (#​18599) (Kostiantyn Ochenash)
• 44915bb docs: Update README (GitHub Actions Bot)
• d50db7b docs: Update vscode-eslint info (#​18595) (Nicholas C. Zakas)

Chores

• b15ee30 chore: upgrade @​eslint/js@​9.6.0 (#​18632) (Milos Djermanovic)
• d655503 chore: package.json update for @​eslint/js release (Jenkins)
• 7c78ad9 refactor: Use language.visitorKeys and check for non-JS SourceCode (#​18625) (Nicholas C. Zakas)
• 69ff64e refactor: Return value of applyInlineConfig() (#​18623) (Nicholas C. Zakas)
• d2d06f7 refactor: use / separator when adjusting ignorePatterns on Windows (#​18613) (Milos Djermanovic)
• 6421973 refactor: fix disable directives for languages with 0-based lines (#​18605) (Milos Djermanovic)
• 0a13539 refactor: Allow optional methods for languages (#​18604) (Nicholas C. Zakas)
• c7ddee0 chore: make internal-rules not being a package (#​18601) (Milos Djermanovic)
• 3379164 chore: remove .eslintrc.js (#​18011) (唯然)
• d0c3a32 chore: update knip (with webdriver-io plugin) (#​18594) (Lars Kappert)

v9.5.0

Compare Source

Features

• b2d256c feat: no-sparse-arrays report on "comma" instead of the whole array (#​18579) (fisker Cheung)

Bug Fixes

• 6880286 fix: treat * as a universal pattern (#​18586) (Milos Djermanovic)
• 7fbe211 fix: message template for all files ignored (#​18564) (Milos Djermanovic)
• 469cb36 fix: Don't lint the same file multiple times (#​18552) (Milos Djermanovic)
• 5cff638 fix: improve message for ignored files without a matching config (#​18404) (Francesco Trotta)

Documentation

• 455f7fd docs: add section about including .gitignore files (#​18590) (Milos Djermanovic)
• 721eafe docs: update info about universal files patterns (#​18587) (Francesco Trotta)
• 8127127 docs: Update README (GitHub Actions Bot)
• 55c2a66 docs: Update README (GitHub Actions Bot)
• eb76282 docs: Update README (GitHub Actions Bot)
• ff6e96e docs: baseConfig and overrideConfig can be arrays (#​18571) (Milos Djermanovic)
• d2d83e0 docs: Add mention of eslint-transforms to v9 migration guide (#​18566) (Nicholas C. Zakas)
• 9ce6832 docs: add callout box for unintuitive behavior (#​18567) (Ben McCann)
• b8db99c docs: Add VS Code info to config migration guide (#​18555) (Nicholas C. Zakas)
• 518a35c docs: Mention config migrator (#​18561) (Nicholas C. Zakas)
• eb440fc docs: specifying files with arbitrary or no extension (#​18539) (Francesco Trotta)
• 38c159e docs: Provide example of reading package.json for plugins meta (#​18530) (Nicholas C. Zakas)
• d16a659 docs: add link to migration guide for --ext CLI option (#​18537) (Milos Djermanovic)
• 73408de docs: add link to configuration file docs before examples (#​18535) (Milos Djermanovic)

Chores

• f588160 chore: upgrade @​eslint/js@​9.5.0 (#​18591) (Milos Djermanovic)
• 5890841 chore: package.json update for @​eslint/js release (Jenkins)
• e9f4ccd chore: remove unused eslint-disable directive (#​18589) (Milos Djermanovic)
• 4b23ffd refactor: Move JS parsing logic into JS language (#​18448) (Nicholas C. Zakas)
• 1495b93 chore: update WebdriverIO packages (#​18558) (Christian Bromann)
• cea7ede chore: add website donate link instead of opencollective (#​18582) (Strek)
• ec94880 chore: package.json update for eslint-config-eslint release (Jenkins)
• 6912586 chore: extract formatting rules into separate config (#​18560) (Milos Djermanovic)
• 9738f7e ci: fix CLI flags for c8, raise thresholds (#​18554) (Francesco Trotta)
• c6de7bb chore: update dependency markdownlint-cli to ^0.41.0 (#​18538) (renovate[bot])
• 2c8fd34 ci: pin @​wdio/browser-runner v8.36.0 (#​18540) (唯然)

v9.4.0

Compare Source

Features

• 89a4a0a feat: ignore IIFE's in the no-loop-func rule (#​17528) (Nitin Kumar)

Bug Fixes

• f6534d1 fix: skip processor code blocks that match only universal patterns (#​18507) (Milos Djermanovic)
• 7226ebd fix: allow implicit undefined return in no-constructor-return (#​18515) (Ali Rezvani)
• 389744b fix: use @eslint/config-inspector@latest (#​18483) (唯然)
• 70118a5 fix: func-style false positive with arrow functions and super (#​18473) (Milos Djermanovic)

Documentation

• d7ab6f5 docs: update theme when when prefers-color-scheme changes (#​18510) (Nitin Kumar)
• 525fdff docs: fix components files (#​18519) (Tanuj Kanti)
• 80747d2 docs: refactor prefer-destructuring rule (#​18472) (Tanuj Kanti)
• f06e0b5 docs: clarify func-style (#​18477) (Cameron Steffen)

Chores

• 010dd2e chore: upgrade to @eslint/js@9.4.0 (#​18534) (Francesco Trotta)
• 5e1b5dc chore: package.json update for @​eslint/js release (Jenkins)
• 594145f refactor: switch to @eslint/config-array (#​18527) (Francesco Trotta)

v9.3.0

Compare Source

Features

• b32153c feat: add overrides.namedExports to func-style rule (#​18444) (Percy Ma)
• b67eba4 feat: add restrictedNamedExportsPattern to no-restricted-exports (#​18431) (Akul Srivastava)
• 069aa68 feat: add option allowEscape to no-misleading-character-class rule (#​18208) (Francesco Trotta)
• 05ef92d feat: deprecate multiline-comment-style & line-comment-position (#​18435) (唯然)
• db0b174 feat: add enforceForInnerExpressions option to no-extra-boolean-cast (#​18222) (Kirk Waiblinger)

Bug Fixes

• 8db0eff fix: Improve config error messages (#​18457) (Nicholas C. Zakas)
• 5c28d9a fix: don't remove comments between key and value in object-shorthand (#​18442) (Kuba Jastrzębski)
• 39fb0ee fix: object-shorthand loses type parameters when auto-fixing (#​18438) (dalaoshu)
• 37eba48 fix: don't crash when fs.readFile returns promise from another realm (#​18416) (Milos Djermanovic)

Documentation

• ceada8c docs: explain how to use "tsc waiting" label (#​18466) (Francesco Trotta)
• 62e686c docs: Add troubleshooting info for plugin compatibility (#​18451) (Nicholas C. Zakas)
• e17e1c0 docs: Update README (GitHub Actions Bot)
• 2465a1e docs: Update README (GitHub Actions Bot)
• d23574c docs: Clarify usage of no-unreachable with TypeScript (#​18445) (benj-dobs)
• 1db9bae docs: Fix typos (#​18443) (Frieder Bluemle)
• 7065196 docs: Update README (GitHub Actions Bot)
• 04e7c6e docs: update deprecation notice of no-return-await (#​18433) (Tanuj Kanti)
• e763512 docs: Link global ignores section in config object property list (#​18430) (MaoShizhong)
• ac7f718 docs: reflect release of v9 in config migration guide (#​18412) (Peter Briggs)
• 0de0909 docs: fix grammar in configuration file resolution (#​18419) (Mike McCready)

Chores

• 58e2719 chore: update dependencies for v9.3.0 release (#​18469) (Francesco Trotta)
• b681ecb chore: package.json update for @​eslint/js release (Jenkins)
• 06f1d1c chore: update dependency @​humanwhocodes/retry to ^0.3.0 (#​18463) (renovate[bot])
• a63ed72 refactor: Use node: protocol for built-in Node.js modules (#​18434) (Milos Djermanovic)
• 040700a chore: update dependency markdownlint-cli to ^0.40.0 (#​18425) (renovate[bot])
• f47847c chore: update actions/stale action to v9 (#​18426) (renovate[bot])
• c18ad25 chore: update actions/upload-artifact action to v4 (#​18427) (renovate[bot])
• 27e3060 chore: Disable documentation label (#​18423) (Nicholas C. Zakas)

v9.2.0

Compare Source

Features

• 8485d76 feat: no-case-declarations add suggestions (#​18388) (Josh Goldberg )
• a498f35 feat: update Unicode letter detection in capitalized-comments rule (#​18375) (Francesco Trotta)

Bug Fixes

• eeec413 fix: do not throw when defining a global named defineSetter (#​18364) (唯然)

Documentation

• 0f5df50 docs: Update README (GitHub Actions Bot)
• 1579ce0 docs: update wording regarding indirect eval (#​18394) (Kirk Waiblinger)
• f12a02c docs: update to eslint v9 in custom-rule-tutorial (#​18383) (唯然)

Chores

• b346605 chore: upgrade @​eslint/js@​9.2.0 (#​18413) (Milos Djermanovic)
• c4c18e0 chore: package.json update for @​eslint/js release (Jenkins)
• 284722c chore: package.json update for eslint-config-eslint release (Jenkins)
• 347d44f chore: remove eslintrc export from eslint-config-eslint (#​18400) (Milos Djermanovic)
• f316e20 ci: run tests in Node.js 22 (#​18393) (Francesco Trotta)

v9.1.1

Compare Source

Bug Fixes

• a26b402 fix: use @​eslint/create-config latest (#​18373) (唯然)

v9.1.0

Compare Source

Features

• 03068f1 feat: Provide helpful error message for nullish configs (#​18357) (Nicholas C. Zakas)
• 751b518 feat: replace dependency graphemer with Intl.Segmenter (#​18110) (Francesco Trotta)
• 4d11e56 feat: add name to eslint configs (#​18289) (唯然)
• 1cbe1f6 feat: allow while(true) in no-constant-condition (#​18286) (Tanuj Kanti)
• 0db676f feat: add Intl in es6 globals (#​18318) (唯然)

Bug Fixes

• 8d18958 fix: Remove name from eslint/js packages (#​18368) (Nicholas C. Zakas)
• 594eb0e fix: do not crash on error in fs.walk filter (#​18295) (Francesco Trotta)
• 0d8cf63 fix: EMFILE errors (#​18313) (Nicholas C. Zakas)
• e1ac0b5 fix: --inspect-config only for flat config and respect -c (#​18306) (Nicholas C. Zakas)
• 09675e1 fix: --no-ignore should not apply to non-global ignores (#​18334) (Milos Djermanovic)

Documentation

• fb50077 docs: include notes about globals in migration-guide (#​18356) (Gabriel Rohden)
• 71c771f docs: Fix missing accessible name for scroll-to-top link (#​18329) (Germán Freixinós)
• 200fd4e docs: indicate eslintrc mode for .eslintignore (#​18285) (Francesco Trotta)
• 16b6a8b docs: Update README (GitHub Actions Bot)
• df5f8a9 docs: paths and patterns difference in no-restricted-imports (#​18273) (Tanuj Kanti)
• c537d76 docs: update npm init @​eslint/config generated file names (#​18298) (唯然)
• e1e305d docs: fix linebreak-style examples (#​18262) (Francesco Trotta)
• 113f51e docs: Mention package.json config support dropped (#​18305) (Nicholas C. Zakas)
• 5c35321 docs: add eslintrc-only note to --rulesdir (#​18281) (Adam Lui 刘展鹏)

Build Related

• 1fa6622 build: do not use --force flag to install dependencies (#​18284) (Francesco Trotta)

Chores

• d9a2983 chore: upgrade @​eslint/js to v9.1.1 (#​18367) (Francesco Trotta)
• 50d406d chore: package.json update for @​eslint/js release (Jenkins)
• 155c71c chore: package.json update for @​eslint/js release (Jenkins)
• 0588fc5 refactor: Move directive gathering to SourceCode (#​18328) (Nicholas C. Zakas)
• 9048e21 chore: lint docs/src/_data js files (#​18335) (Milos Djermanovic)
• 4820790 chore: upgrade globals@15.0.0 dev dependency (#​18332) (Milos Djermanovic)
• 698d9ff chore: upgrade jsdoc & unicorn plugins in eslint-config-eslint (#​18333) (Milos Djermanovic)
• 32c08cf chore: drop Node < 18 and use @​eslint/js v9 in eslint-config-eslint (#​18323) (Milos Djermanovic)
• a76fb55 chore: @​eslint-community/eslint-plugin-eslint-comments v4.3.0 (#​18319) (Milos Djermanovic)
• 78e45b1 chore: eslint-plugin-eslint-plugin v6.0.0 (#​18316) (唯然)
• 36103a5 chore: eslint-plugin-n v17.0.0 (#​18315) (唯然)

v9.0.0

Compare Source

Breaking Changes

• b7cf3bd fix!: correct camelcase rule schema for allow option (#​18232) (eMerzh)
• 09bd7fe feat!: move AST traversal into SourceCode (#​18167) (Nicholas C. Zakas)
• 79a95eb feat!: disallow multiple configuration comments for same rule (#​18157) (Milos Djermanovic)
• 9163646 feat!: Rule Tester checks for missing placeholder data in the message (#​18073) (fnx)
• 3c4d51d feat!: default for enforceForClassMembers in no-useless-computed-key (#​18054) (Francesco Trotta)
• 47e60f8 feat!: Stricter rule test validations (#​17654) (fnx)
• 1a94589 feat!: no-unused-vars default caughtErrors to 'all' (#​18043) (Josh Goldberg )
• 57089cb feat!: no-restricted-imports allow multiple config entries for same path (#​18021) (Milos Djermanovic)
• 2e1d549 feat!: detect duplicate test cases (#​17955) (Bryan Mishkin)
• 701f1af feat!: no-inner-declaration new default behaviour and option (#​17885) (Tanuj Kanti)
• bde5105 fix!: handle --output-file for empty output when saving to disk (#​17957) (Nitin Kumar)
• 07107a5 fix!: upgrade eslint-scope@8.0.0 (#​17942) (Milos Djermanovic)
• 3ee0f6c fix!: no-unused-vars varsIgnorePattern behavior with catch arguments (#​17932) (Tanuj Kanti)
• 51f8bc8 fix!: configuration comments with just severity should retain options (#​17945) (Milos Djermanovic)
• d191bdd feat!: Remove CodePath#currentSegments (#​17936) (Milos Djermanovic)
• 946ae00 feat!: FlatRuleTester -> RuleTester (#​17922) (Nicholas C. Zakas)
• baff28c feat!: remove no-inner-declarations from eslint:recommended (#​17920) (Milos Djermanovic)
• cadfbcd feat!: Rename FlatESLint to ESLint (#​17914) (Nicholas C. Zakas)
• d1018fc feat!: skip running warnings in --quiet mode (#​17274) (Maddy Miller)
• fb81b1c feat!: Set default schema: [], drop support for function-style rules (#​17792) (Milos Djermanovic)
• 0b21e1f feat!: add two more cases to no-implicit-coercion (#​17832) (Gürgün Dayıoğlu)
• 2916c63 feat!: Switch Linter to flat config by default (#​17851) (Nicholas C. Zakas)
• 200518e fix!: Parsing 'exported' comment using parseListConfig (#​17675) (amondev)
• bdd6ba1 feat!: Remove valid-jsdoc and require-jsdoc (#​17694) (Nicholas C. Zakas)
• 12be307 fix!: Behavior of CLI when no arguments are passed (#​17644) (Nicholas C. Zakas)
• 8fe8c56 feat!: Update shouldUseFlatConfig and CLI so flat config is default (#​17748) (Nicholas C. Zakas)
• 60dea3e feat!: deprecate no-new-symbol, recommend no-new-native-nonconstructor (#​17710) (Francesco Trotta)
• 5aa9c49 feat!: check for parsing errors in suggestion fixes (#​16639) (Bryan Mishkin)
• b3e0bb0 feat!: assert suggestion messages are unique in rule testers (#​17532) (Josh Goldberg )
• e563c52 feat!: no-invalid-regexp make allowConstructorFlags case-sensitive (#​17533) (Josh Goldberg )
• e5f02c7 fix!: no-sequences rule schema correction (#​17878) (MHO)
• 6ee3e9e feat!: Update eslint:recommended configuration (#​17716) (Milos Djermanovic)
• c2cf85a feat!: drop support for string configurations in flat config array (#​17717) (Milos Djermanovic)
• c314fd6 feat!: Remove SourceCode#getComments() (#​17715) (Milos Djermanovic)
• ae78ff1 feat!: Remove deprecated context methods (#​17698) (Nicholas C. Zakas)
• f71c328 feat!: Swap FlatESLint-ESLint, FlatRuleTester-RuleTester in API (#​17823) (Nicholas C. Zakas)
• 5304da0 feat!: remove formatters except html, json(-with-metadata), and stylish (#​17531) (Josh Goldberg )
• e1e827f feat!: Require Node.js ^18.18.0 || ^20.9.0 || >=21.1.0 (#​17725) (Milos Djermanovic)

Features

• d54a412 feat: Add --inspect-config CLI flag (#​18270) (Nicholas C. Zakas)
• 97ce45b feat: Add reportUsedIgnorePattern option to no-unused-vars rule (#​17662) (Pearce Ropion)
• 3e9fcea feat: Show config names in error messages (#​18256) (Nicholas C. Zakas)
• de40874 feat: Rule Performance Statistics for flat ESLint (#​17850) (Mara Kiefer)
• d85c436 feat: use-isnan report NaN in indexOf and lastIndexOf with fromIndex (#​18225) (Tanuj Kanti)
• b8fb572 feat: add reportUnusedFallthroughComment option to no-fallthrough rule (#​18188) (Kirk Waiblinger)
• 1c173dc feat: add ignoreClassWithStaticInitBlock option to no-unused-vars (#​18170) (Tanuj Kanti)
• a451b32 feat: make no-misleading-character-class report more granular errors (#​18082) (Francesco Trotta)
• c49ed63 feat: update complexity rule for optional chaining & default values (#​18152) (Mathias Schreck)
• 11144a2 feat: no-restricted-imports option added allowImportNames (#​16196) (M Pater)
• 74124c2 feat: add suggestions to use-isnan in indexOf & lastIndexOf calls (#​18063) (StyleShit)
• 53f0f47 feat: Add loadESLint() API method for v9 (#​18097) (Nicholas C. Zakas)
• 2d11d46 feat: add suggestions to use-isnan in binary expressions (#​17996) (StyleShit)
• 26093c7 feat: fix false negatives in no-this-before-super (#​17762) (Yosuke Ota)
• 5471e43 feat: convert unsafe autofixes to suggestions in no-implicit-coercion (#​17985) (Gürgün Dayıoğlu)
• e3051be feat: emit warning when .eslintignore file is detected (#​17952) (Nitin Kumar)
• a630edd feat: maintain latest ecma version in ESLint (#​17958) (Milos Djermanovic)
• b4e0503 feat: add no-useless-assignment rule (#​17625) (Yosuke Ota)
• 287c4b7 feat: no-misleading-character-class granular errors (#​17515) (Josh Goldberg )
• 8792464 feat: Enable eslint.config.mjs and eslint.config.cjs (#​17909) (Nicholas C. Zakas)
• 24ce927 feat: warn by default for unused disable directives (#​17879) (Bryan Mishkin)

Bug Fixes

• 610c148 fix: Support using declarations in no-lone-blocks (#​18269) (Kirk Waiblinger)
• e508800 fix: rule tester ignore irrelevant test case properties (#​18235) (fnx)
• a129acb fix: flat config name on ignores object (#​18258) (Nicholas C. Zakas)
• dadc5bf fix: constructor-super false positives with loops (#​18226) (Milos Djermanovic)
• ae8103d fix: load plugins in the CLI in flat config mode (#​18185) (Francesco Trotta)
• e37153f fix: improve error message for invalid rule config (#​18147) (Nitin Kumar)
• af6e170 fix: stop linting files after an error (#​18155) (Francesco Trotta)
• 0cb4914 fix: validate options when comment with just severity enables rule (#​18133) (Milos Djermanovic)
• c4d26fd fix: use-isnan doesn't report on SequenceExpressions (#​18059) (StyleShit)
• 39076fb fix: handle absolute file paths in RuleTester (#​17989) (Nitin Kumar)
• 6d11f3d fix: Ensure config keys are printed for config errors (#​17980) (Nicholas C. Zakas)
• 806f708 fix: no-misleading-character-class edge cases with granular errors (#​17970) (Milos Djermanovic)
• f182114 fix: deep merge behavior in flat config (#​17906) (Francesco Trotta)
• b577e8a fix: allow circular references in config (#​17752) (Francesco Trotta)

Documentation

• e151050 docs: update get-started to the new @eslint/create-config (#​18217) (唯然)
• 94178ad docs: mention about name field in flat config (#​18252) (Anthony Fu)
• 1765c24 docs: add Troubleshooting page (#​18181) (Josh Goldberg )
• 96607d0 docs: version selectors synchronization (#​18260) (Milos Djermanovic)
• 651ec91 docs: remove /* eslint-env */ comments from rule examples (#​18249) (Milos Djermanovic)
• 950c4f1 docs: Update README (GitHub Actions Bot)
• 12f5746 docs: add info about dot files and dir in flat config (#​18239) (Tanuj Kanti)
• b93f408 docs: update shared settings example (#​18251) (Tanuj Kanti)
• 26384d3 docs: fix ecmaVersion in one example, add checks (#​18241) (Milos Djermanovic)
• 7747097 docs: Update MR review process (#​18233) (Nicholas C. Zakas)
• b07d427 docs: fix typo (#​18246) (Kirill Gavrilov)
• 778082d docs: add Glossary page (#​18187) (Josh Goldberg )
• 239a7e2 docs: Clarify the description of sort-imports options (#​18198) (gyeongwoo park)
• 4769c86 docs: fix incorrect example in no-lone-blocks (#​18215) (Tanuj Kanti)
• 5251327 docs: Update README (GitHub Actions Bot)
• 1dc8618 docs: Update README (GitHub Actions Bot)
• ba1c1bb docs: Update README (GitHub Actions Bot)
• 337cdf9 docs: Explain limitations of RuleTester fix testing (#​18175) (Nicholas C. Zakas)
• c7abd89 docs: Explain Node.js version support (#​18176) (Nicholas C. Zakas)
• d961eeb docs: show red underlines in examples in rules docs (#​18041) (Yosuke Ota)
• 558274a docs: Update README (GitHub Actions Bot)
• 2908b9b docs: Update release documentation (#​18174) (Nicholas C. Zakas)
• 1f1260e docs: replace HackerOne link with GitHub advisory (#​18165) (Francesco Trotta)
• e5ef3cd docs: add inline cases condition in no-fallthrough (#​18158) (Tanuj Kanti)
• 450d0f0 docs: fix ignore option docs (#​18154) (Francesco Trotta)
• 5fe095c docs: show v8.57.0 as latest version in dropdown (#​18142) (Milos Djermanovic)
• 7db5bb2 docs: Show prerelease version in dropdown (#​18135) (Nicholas C. Zakas)
• 73a5f06 docs: Update README (GitHub Actions Bot)
• f95cd27 docs: Disallow multiple rule configuration comments in the same example (#​18116) (Milos Djermanovic)
• d8068ec docs: Update link for schema examples (#​18112) (Svetlana)
• f1c7e6f docs: Switch to Ethical Ads (#​18090) (Strek)
• 15c143f docs: JS Foundation -> OpenJS Foundation in MR template (#​18092) (Nicholas C. Zakas)
• 6ea339e docs: add stricter rule test validations to v9 migration guide (#​18085) (Milos Djermanovic)
• 3c816f1 docs: use relative link from CLI to core concepts (#​18083) (Milos Djermanovic)
• 9458735 docs: fix malformed eslint config comments in rule examples (#​18078) (Francesco Trotta)
• 07a1ada docs: link from --fix CLI doc to the relevant core concept (#​18080) (Bryan Mishkin)
• b844324 docs: Update team responsibilities (#​18048) (Nicholas C. Zakas)
• aadfb60 docs: document languageOptions and other v9 changes for context (#​18074) (fnx)
• 857e242 docs: tweak explanation for meta.docs rule properties (#​18057) (Bryan Mishkin)
• 10485e8 docs: recommend messageId over message for reporting rule violations (#​18050) (Bryan Mishkin)
• 98b5ab4 docs: Update README (GitHub Actions Bot)
• 505fbf4 docs: update no-restricted-imports rule (#​18015) (Tanuj Kanti)
• c25b4af docs: Update README (GitHub Actions Bot)
• 33d1ab0 docs: add more examples to flat config ignores docs (#​18020) (Milos Djermanovic)
• e6eebca docs: Update sort-keys options properties count (#​18025) (LB (Ben Johnston))
• 1fedfd2 docs: Improve flat config ignores docs (#​17997) (Nicholas C. Zakas)
• 38b9b06 docs: update valid-typeof rule (#​18001) (Tanuj Kanti)
• b4abfea docs: Update note about ECMAScript support (#​17991) (Francesco Trotta)
• 6788873 docs: Update release blog post template (#​17994) (Nicholas C. Zakas)
• 1f37442 docs: Add sections on non-npm plugin configuration (#​17984) (Nicholas C. Zakas)
• 96307da docs: migration guide entry for no-inner-declarations (#​17977) (Tanuj Kanti)
• 40be60e docs: Update README (GitHub Actions Bot)
• d31c180 docs: fix number of code-path events on custom rules page (#​17969) (Richard Hunter)
• 1529ab2 docs: reorder entries in v9 migration guide (#​17967) (Milos Djermanovic)
• 9507525 docs: Explain how to combine configs (#​17947) (Nicholas C. Zakas)
• 7c78576 docs: Add more removed context methods to migrate to v9 guide (#​17951) (Milos Djermanovic)
• 3a877d6 docs: Update removed CLI flags migration (#​17939) (Nicholas C. Zakas)
• 4a9cd1e docs: Update Linter API for v9 (#​17937) (Milos Djermanovic)
• 2a8eea8 docs: update docs for v9.0.0-alpha.0 (#​17929) (Milos Djermanovic)
• 7f0ba51 docs: show NEXT in version selectors (#​17911) (Milos Djermanovic)
• 0a7911e docs: add flat config default to v9 migration guide (#​17927) (Milos Djermanovic)
• 94f8065 docs: Add CLI updates to migrate to v9 guide (#​17924) (Nicholas C. Zakas)
• 16187f2 docs: Add exported and string config notes to migrate to v9 guide (#​17926) (Nicholas C. Zakas)
• 3ae50cc docs: Add RuleTester changes to migrate to v9 guide (#​17923) (Nicholas C. Zakas)
• 0831b58 docs: add rule changes to v9 migration guide (#​17925) (Milos Djermanovic)
• 037abfc docs: update API docs (#​17919) (Milos Djermanovic)
• afc3c03 docs: add function-style and meta.schema changes to v9 migration guide (#​17912) (Milos Djermanovic)
• 1da0723 docs: update eslint:recommended section in Migrate to v9.x (#​17908) (Milos Djermanovic)
• f55881f docs: remove configuration-files-new.md (#​17907) (Milos Djermanovic)
• 63ae191 docs: Migrate to v9.0.0 (#​17905) (Nicholas C. Zakas)
• e708496 docs: Switch to flat config by default (#​17840) (Nicholas C. Zakas)
• fdf0424 docs: Update Create a Plugin for flat config (#​17826) (Nicholas C. Zakas)
• e6a91bd docs: Switch shareable config docs to use flat config (#​17827) (Nicholas C. Zakas)
• 3831fb7 docs: updated examples of max-lines rule (#​17898) (Tanuj Kanti)
• cd1ac20 docs: Update README (GitHub Actions Bot)

Build Related

• 26010c2 Build: changelog update for 9.0.0-rc.0 (Jenkins)
• b91f9dc build: fix TypeError in prism-eslint-hooks.js (#​18209) (Francesco Trotta)
• d7ec0d1 Build: changelog update for 9.0.0-beta.2 (Jenkins)
• fd9c0a9 Build: changelog update for 9.0.0-beta.1 (Jenkins)
• c9f2f33 build: changelog update for 8.57.0 (#​18144) (Milos Djermanovic)
• 1bbc495 Build: changelog update for 9.0.0-beta.0 (Jenkins)
• 96f8877 Build: changelog update for 9.0.0-alpha.2 (Jenkins)
• 52d5e7a Build: changelog update for 9.0.0-alpha.1 (Jenkins)
• c2bf27d build: update docs files when publishing prereleases (#​17940) (Milos Djermanovic)
• e91d85d Build: changelog update for 9.0.0-alpha.0 (Jenkins)

Chores

• 19f9a89 chore: Update dependencies for v9.0.0 (#​18275) (Nicholas C. Zakas)
• 7c957f2 chore: package.json update for @​eslint/js release (Jenkins)
• d73a33c chore: ignore /docs/v8.x in link checker (#​18274) (Milos Djermanovic)
• 44a81c6 chore: upgrade knip (#​18272) (Lars Kappert)
• e80b60c chore: remove code for testing version selectors (#​18266) (Milos Djermanovic)
• a98babc chore: add npm script to run WebdriverIO test (#​18238) (Francesco Trotta)
• 9b7bd3b chore: update dependency markdownlint to ^0.34.0 (#​18237) (renovate[bot])
• 297416d chore: package.json update for eslint-9.0.0-rc.0 (#​18223) (Francesco Trotta)
• d363c51 chore: package.json update for @​eslint/js release (Jenkins)
• 1b841bb chore: fix some comments (#​18213) (avoidaway)
• 29c3595 chore: remove repetitive words (#​18193) (cuithon)
• acc2e06 chore: Introduce Knip (#​18005) (Lars Kappert)
• 7509276 chore: upgrade @​eslint/js@​9.0.0-beta.2 (#​18180) (Milos Djermanovic)
• 96087b3 chore: package.json update for @​eslint/js release (Jenkins)
• 925afa2 chore: Remove some uses of lodash.merge (#​18179) (Milos Djermanovic)
• 972ef15 chore: remove invalid type in @​eslint/js (#​18164) (Nitin Kumar)
• 32ffdd1 chore: upgrade @​eslint/js@​9.0.0-beta.1 (#​18146) (Milos Djermanovic)
• e41425b chore: package.json update for @​eslint/js release (Jenkins)
• bb3b9c6 chore: upgrade @​eslint/eslintrc@​3.0.2 (#​18145) (Milos Djermanovic)
• e462524 chore: upgrade eslint-release@3.2.2 (#​18138) (Milos Djermanovic)
• 8e13a6b chore: fix spelling mistake in README.md (#​18128) (Will Eastcott)
• 66f52e2 chore: remove unused tools rule-types.json, update-rule-types.js (#​18125) (Josh Goldberg )
• bf0c7ef ci: fix sync-labels value of pr-labeler (#​18124) (Tanuj Kanti)
• cace6d0 ci: add MR labeler action (#​18109) (Nitin Kumar)
• 1a65d3e chore: export base config from eslint-config-eslint (#​18119) (Milos Djermanovic)
• 9aa4df3 refactor: remove globals dependency (#​18115) (Milos Djermanovic)
• e40d1d7 chore: upgrade @​eslint/js@​9.0.0-beta.0 (#​18108) (Milos Djermanovic)
• 9870f93 chore: package.json update for @​eslint/js release (Jenkins)
• 2c62e79 chore: upgrade @​eslint/eslintrc@​3.0.1 (#​18107) (Milos Djermanovic)
• 81f0294 chore: upgrade espree@10.0.1 (#​18106) (Milos Djermanovic)
• 5e2b292 chore: upgrade eslint-visitor-keys@4.0.0 (#​18105) (Milos Djermanovic)
• ce838ad chore: replace dependency npm-run-all with npm-run-all2 ^5.0.0 (#​18045) (renovate[bot])
• 54df731 chore: update dependency markdownlint-cli to ^0.39.0 (#​18084) (renovate[bot])
• 8f06a60 chore: update dependency shelljs to ^0.8.5 (#​18079) (Francesco Trotta)
• 93ffe30 chore: update dependency file-entry-cache to v8 (#​17903) (renovate[bot])
• 6ffdcbb chore: upgrade @​eslint/js@​9.0.0-alpha.2 (#​18038) (Milos Djermanovic)
• 2c12715 chore: package.json update for @​eslint/js release (Jenkins)
• cc74c4d chore: upgrade espree@10.0.0 (#​18037) (Milos Djermanovic)
• dfb68b6 chore: use Node.js 20 for docs sites (#​18026) (Milos Djermanovic)
• 8c1b8dd test: add more tests for ignoring files and directories (#​18018) (Milos Djermanovic)
• 60b966b chore: update dependency @​eslint/js to v9.0.0-alpha.1 (#​18014) (renovate[bot])
• c893bc0 chore: update markdownlint to v0.33.0 (#​17995) (Nitin Kumar)
• c5e50ee chore: package.json update for @​eslint/js release (Jenkins)
• 1bf2520 chore: Split Docs CI from core CI (#​17897) (Nicholas C. Zakas)
• 320787e chore: delete relative-module-resolver.js (#​17981) (Francesco Trotta)
• 4926f33 refactor: use Object.hasOwn() (#​17948) (Milos Djermanovic)
• df200e1 refactor: use Array.prototype.at() to get last elements (#​17949) (Milos Djermanovic)
• 750b8df chore: update dependency glob to v10 (#​17917) (renovate[bot])
• 74794f5 chore: removed unused eslintrc modules (#​17938) (Milos Djermanovic)
• 10ed29c chore: remove unused dependency rimraf (#​17934) (Francesco Trotta)
• 903ee60 ci: use --force flag when installing eslint (#​17921) (Milos Djermanovic)
• 17fedc1 chore: upgrade @​eslint/js@​9.0.0-alpha.0 (#​17928) (Milos Djermanovic)
• cb89ef3 chore: package.json update for @​eslint/js release (Jenkins)
• f6f4a45 chore: drop structuredClone polyfill for v9 (#​17915) (Kevin Gibbons)
• 412dcbb chore: upgrade eslint-plugin-n@16.6.0 (#​17916) (Milos Djermanovic)
• 02a8baf chore: Rename files with underscores (#​17910) (Nicholas C. Zakas)
• c0f5d91 chore: remove creating an unused instance of Linter in tests (#​17902) (Milos Djermanovic)
• 3826cdf chore: use jsdoc/no-multi-asterisks with allowWhitespace: true (#​17900) (Percy Ma)
• a9a17b3 chore: fix getting scope in tests (#​17899) (Milos Djermanovic)
• 595a1f6 test: ensure that CLI tests run with FlatESLint (#​17884) (Francesco Trotta)
• c7eca43 chore: update dependency markdownlint-cli to ^0.38.0 (#​17865) (renovate[bot])
• cc0c9f7 ci: bump github/codeql-action from 2 to 3 (#​17873) (dependabot[bot])

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