ESLint v9.39.1 released

Highlights

This patch release fixes an issue introduced in ESLint v9.39.0 where visitors of all rules are invoked with a second argument. This change broke third-party rules that expect visitor functions to receive only a single argument, notably @typescript-eslint/unified-signatures. To ensure compatibility, ESLint v9.39.1 restores the previous behavior of invoking visitors for JavaScript/TypeScript with only the target node as the argument.

Bug Fixes

• 650753e fix: Only pass node to JS lang visitor methods (#20283) (Nicholas C. Zakas)

Documentation

• 51b51f4 docs: add a section on when to use extends vs cascading (#20268) (Tanuj Kanti)
• b44d426 docs: Update README (GitHub Actions Bot)

Chores

• 92db329 chore: update @eslint/js version to 9.39.1 (#20284) (Francesco Trotta)
• c7ebefc chore: package.json update for @eslint/js release (Jenkins)
• 61778f6 chore: update eslint-config-eslint dependency @eslint/js to ^9.39.0 (#20275) (renovate[bot])
• d9ca2fc ci: Add rangeStrategy to eslint group in renovate config (#20266) (唯然)
• 009e507 test: fix version tests for ESLint v10 (#20274) (Milos Djermanovic)