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+---
+layout: post
+title: ESLint v9.21.0 released
+teaser: "We just pushed ESLint v9.21.0, which is a minor release upgrade of ESLint. This release adds some new features and fixes several bugs found in the previous release."
+image: release-notes-minor.png
+draft: true
+authors:
+  - eslintbot
+categories:
+  - Release Notes
+tags:
+  - Release
+---
+
+
+
+
+
+
+
+
+## Features
+
+
+* [`418717f`](https://github.com/eslint/eslint/commit/418717f1150bb794c40014eca60c9116de2b0488) feat: introduce new deprecated types for rules ([#19238](https://github.com/eslint/eslint/issues/19238)) (fnx)
+* [`5c5b802`](https://github.com/eslint/eslint/commit/5c5b8025d3e2a2a796909bdf7866fdce2a2f334c) feat: Add `--ext` CLI option ([#19405](https://github.com/eslint/eslint/issues/19405)) (Milos Djermanovic)
+
+
+
+
+
+
+## Bug Fixes
+
+
+* [`db5340d`](https://github.com/eslint/eslint/commit/db5340d57bff6b6e3a148f0f2bb56c7da6614ec0) fix: update missing plugin message template ([#19445](https://github.com/eslint/eslint/issues/19445)) (Milos Djermanovic)
+* [`d8ffdd4`](https://github.com/eslint/eslint/commit/d8ffdd4e51ac46cef51b4118aa3d97195b38de63) fix: do not exit process on rule crash ([#19436](https://github.com/eslint/eslint/issues/19436)) (Francesco Trotta)
+
+
+
+
+## Documentation
+
+
+* [`c5561ea`](https://github.com/eslint/eslint/commit/c5561ea7fcc9d48f7c8017f51fb64fcdf13ff832) docs: Update README (GitHub Actions Bot)
+* [`80b0485`](https://github.com/eslint/eslint/commit/80b048535e1d951692e838fe502fb0edb72c837f) docs: replace `var` with `let` and `const` in rule example ([#19434](https://github.com/eslint/eslint/issues/19434)) (Tanuj Kanti)
+* [`f67d5e8`](https://github.com/eslint/eslint/commit/f67d5e875324a9d899598b11807a9c7624021432) docs: Update README (GitHub Actions Bot)
+* [`75afc61`](https://github.com/eslint/eslint/commit/75afc61ff89c8c38a31877d1302584af9266f6d3) docs: Update README (GitHub Actions Bot)
+* [`0636cab`](https://github.com/eslint/eslint/commit/0636caba7dd7c77c1845a69257bda68d5287a097) docs: Update Eleventy from v2 to v3 ([#19415](https://github.com/eslint/eslint/issues/19415)) (Amaresh  S M)
+* [`dd7d930`](https://github.com/eslint/eslint/commit/dd7d93063418a9a9064a0e7cb7f556f5b8b6e96b) docs: Update README (GitHub Actions Bot)
+
+
+
+
+
+
+
+
+## Chores
+
+
+* [`a8c9a9f`](https://github.com/eslint/eslint/commit/a8c9a9f1b30db08094b145dd79921ae302b6ae24) chore: update `@eslint/eslintrc` and `@eslint/js` ([#19453](https://github.com/eslint/eslint/issues/19453)) (Francesco Trotta)
+* [`265e0cf`](https://github.com/eslint/eslint/commit/265e0cf6d03df44f0e65ce5bcb0bac382189486a) chore: package.json update for @eslint/js release (Jenkins)
+* [`3401b85`](https://github.com/eslint/eslint/commit/3401b85faaf75629900b7592433169fc00d8b224) test: add test for `Rule.ReportDescriptor` type ([#19449](https://github.com/eslint/eslint/issues/19449)) (Francesco Trotta)
+* [`e497aa7`](https://github.com/eslint/eslint/commit/e497aa75f5441406985d417303081944f24acf6f) chore: update rewrite dependencies ([#19448](https://github.com/eslint/eslint/issues/19448)) (Francesco Trotta)
+* [`dab5478`](https://github.com/eslint/eslint/commit/dab5478e8628447dbf9eaaa8b6f36d7ca253ed48) chore: better error message for missing plugin in config ([#19402](https://github.com/eslint/eslint/issues/19402)) (Tanuj Kanti)
+* [`ebfe2eb`](https://github.com/eslint/eslint/commit/ebfe2ebc3d8b8f2d84caf309b2fc6bc8fd66fc22) chore: set js language for bug report issue config block ([#19439](https://github.com/eslint/eslint/issues/19439)) (Josh Goldberg ✨)
+* [`5fd211d`](https://github.com/eslint/eslint/commit/5fd211d00b6f0fc58cf587196a432325b7b88ec2) test: processors can return subpaths ([#19425](https://github.com/eslint/eslint/issues/19425)) (Milos Djermanovic)
+
+