ESLint v8.56.0 released

Highlights

New features for reporting unused disable directives

• The ESLint CLI has a new option --report-unused-disable-directives-severity. This option is available in both eslintrc and flat config modes.
• The linterOptions.reportUnusedDisableDirectives configuration option can now be set to a severity value: "error" (or 2), "warn" (or 1), "off" (or 0). This feature is available only in flat config files (eslint.config.js).

Features

• 0dd9704 feat: Support custom severity when reporting unused disable directives (#17212) (Bryan Mishkin)
• 31a7e3f feat: fix no-restricted-properties false negatives with unknown objects (#17818) (Arka Pratim Chaudhuri)

Bug Fixes

• 7d5e5f6 fix: TypeError: fs.exists is not a function on read-only file system (#17846) (Francesco Trotta)
• 74739c8 fix: suggestion with invalid syntax in no-promise-executor-return rule (#17812) (Bryan Mishkin)

Documentation

• 9007719 docs: update link in ways-to-extend (#17839) (Amel SELMANE)
• 3a22236 docs: Update README (GitHub Actions Bot)
• 54c3ca6 docs: fix migration-guide example (#17829) (Tanuj Kanti)
• 4391b71 docs: check config comments in rule examples (#17815) (Francesco Trotta)
• fd28363 docs: remove mention about ESLint stylistic rules in readme (#17810) (Zwyx)
• 48ed5a6 docs: Update README (GitHub Actions Bot)

Chores

• ba6af85 chore: upgrade @eslint/js@8.56.0 (#17864) (Milos Djermanovic)
• 60a531a chore: package.json update for @eslint/js release (Jenkins)
• ba87a06 chore: update dependency markdownlint to ^0.32.0 (#17783) (renovate[bot])
• 9271d10 chore: add GitHub issue template for docs issues (#17845) (Josh Goldberg ✨)
• 70a686b chore: Convert rule tests to FlatRuleTester (#17819) (Nicholas C. Zakas)
• f3a599d chore: upgrade eslint-plugin-unicorn to v49.0.0 (#17837) (唯然)
• 905d4b7 chore: upgrade eslint-plugin-eslint-plugin v5.2.1 (#17838) (唯然)
• 4d7c3ce chore: update eslint-plugin-n v16.4.0 (#17836) (唯然)
• fd0c60c ci: unpin Node.js 21.2.0 (#17821) (Francesco Trotta)