eslint 9.0.0-alpha.0

on Node.js Yarn

Breaking Changes

• 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

• 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

• f182114 fix: deep merge behavior in flat config (#17906) (Francesco Trotta)
• b577e8a fix: allow circular references in config (#17752) (Francesco Trotta)

Documentation

• 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)

Chores

• 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])