CHANGELOG.md

Changelog

1.1.0 (2026-03-29)

Features

• add CSS unit baseline checking (#403) (51f24f4)

Bug Fixes

• correctly extract baseline support for CSS functions (#401) (a1b5c6f)
• update baseline data (#399) (235f451)
• update baseline data (#405) (616558e)
• update baseline data (#412) (6f8c083)

1.0.0 (2026-03-08)

⚠ BREAKING CHANGES

• export types from main entry and remove /types export (#353)
• remove rollup, extraneous types and migrate to ESM-only (#352)
• Bump to v1.0.0
• Require Node.js ^20.19.0 || ^22.13.0 || >=24 (#302)

Features

• Allow function-based customSyntax options (#357) (3479200)
• Bump to v1.0.0 (050bde3)
• export types from main entry and remove /types export (#353) (bb390d6)
• Require Node.js ^20.19.0 || ^22.13.0 || >=24 (#302) (a1eb7f5)

Bug Fixes

• add missing name property to recommended config (#336) (f115c3f)
• correct parent typing for rule visitors (#313) (17046d0)
• remove rollup, extraneous types and migrate to ESM-only (#352) (321d470)
• report invalid properties inside nested at-rules (#369) (6f77115)
• skip descriptor validation for nestable at-rules (#362) (50ff5c1)
• update @eslint/core to v1.0.0 and adjust tests (#337) (c94ea92)
• update baseline data (d93ecd4)
• update baseline data (105102e)
• update baseline data (85ed786)
• update baseline data (#321) (61090f9)
• update baseline data (#326) (cddbf92)
• update baseline data (#332) (85254d4)
• update baseline data (#343) (f2ef187)
• update baseline data (#347) (17746f9)
• update baseline data (#359) (688782b)
• update baseline data (#368) (8e3cae4)
• update baseline data (#373) (668d81d)
• update baseline data (#375) (9953c9c)
• update baseline data (#379) (9bf7ceb)
• update baseline data (#383) (233dee2)
• update baseline data (#395) (6cf16dc)
• update dependency @eslint/css-tree to ^3.6.9 (#378) (0999dbf)
• update dependency @eslint/plugin-kit to ^0.5.1 (#358) (ac57dc8)
• update eslint (#372) (eaabed6)
• update eslint (#392) (9cd8b78)

Miscellaneous Chores

• Fix release version (2325732)

0.14.1 (2025-11-04)

Bug Fixes

• update baseline data (61480f0)

0.14.0 (2025-10-29)

Features

• add allow* options to use-baseline rule (#310) (e8dc57d)
• add no-unmatchable-selectors rule (#301) (adaa397)

Bug Fixes

• correct message for functions in use-baseline rule (#297) (cc0dff7)
• disallow extra properties in rule options (#299) (baf36e2)
• enforce valid allow* values in prefer-logical-properties rule (#311) (23caee3)
• update baseline data (#296) (0f6725f)
• update baseline data (#306) (2f44739)

0.13.0 (2025-10-10)

Features

• add selector-complexity rule (#252) (2bd29c4)

Bug Fixes

• handle missing declaration state in no-invalid-properties (#290) (4120774)

0.12.0 (2025-10-06)

Features

• add support for getLocFromIndex and getIndexFromLoc (#167) (3baeacf)

Bug Fixes

• correct location reporting for !important in no-important rule (#286) (33ea905)
• correct the return type of applyInlineConfig (#281) (386f42a)
• handle all CSS newline types in CSSSourceCode (#275) (2d0eec6)
• handle all CSS newlines in rules (#280) (ed0c0f1)
• no-invalid-properties false positives for var() in functions (#227) (268c7f0)
• update baseline data (fb65800)
• update baseline data (#287) (73734bb)

0.11.1 (2025-09-22)

Bug Fixes

• detect prefixed @keyframes in no-duplicate-keyframe-selectors (11ae50f)
• detect prefixed [@keyframes](https://github.com/keyframes) in no-duplicate-keyframe-selectors (#251) (11ae50f)
• Ensure languageOptions.customSyntax is serializable (#212) (7f82110)
• update baseline data (#245) (a009bb7)
• update baseline data (#254) (ff77374)
• update baseline data (#257) (b5414d3)
• update baseline data (#267) (da37950)

0.11.0 (2025-08-28)

Features

• add @namespace validation to no-invalid-at-rule-placement rule (#183) (26b902c)
• add font-family-fallbacks rule (#174) (5678024)
• add allow-list options for at-rules, properties, and selectors (#228) (623ad8e)
• add autofix to no-duplicate-imports rule (#216) (0aa7b97)
• add new rule no-duplicate-keyframe-selectors (#143) (dfe9c05)
• add suggestion to no-important rule to remove !important flag (#217) (47e26b3)
• allow relative-size and global values in relative-font-units (#214) (933d71c)
• make var() regex multiline-safe in no-invalid-properties (#242) (c123f6e)

Bug Fixes

• allow any type for meta.docs.recommended in custom rules (#231) (6ea61a5)
• bump plugin-kit to latest to resolve security vulnerabilities (#209) (32e02d6)
• disallow extra properties in rule options (#197) (8fd755d)
• enforce strict syntax for [@charset](https://github.com/charset) in no-invalid-at-rules (#192) (4d3d140)
• make no-invalid-properties var() case-insensitive (#232) (ad0cbdb)
• make relative-font-units unit matching case-insensitive (#222) (7a2ecad)
• prevent false positives for !important inside comments (#218) (3c6937a)
• recursively resolve custom properties in no-invalid-properties (#237) (f2ee3fd)
• treat at-rule names as case-insensitive across rules (#233) (9765135)
• update baseline data (8ee9da0)
• update baseline data (#207) (79e06c6)
• update baseline data (#213) (30ca01c)
• update baseline data (#234) (5f409d3)
• update baseline data (#238) (d058f1c)
• update baseline data (#241) (330c326)
• Upgrade @eslint/css-tree (#243) (136e2ab)
• var() with fallback value in no-invalid-properties (#184) (1db0b1a)

0.10.0 (2025-07-11)

⚠ BREAKING CHANGES

• Remove Tailwind syntax in favor of external tailwind-csstree (#166)

Features

• add allowUnknownVariables option to no-invalid-properties (#178) (932cf62)
• add no-invalid-named-grid-areas rule (#169) (162f6e5)
• add no-invalid-at-rule-placement rule (#171) (bb90e3a)
• Remove Tailwind syntax in favor of external tailwind-csstree (#166) (a035fa7)

Bug Fixes

• Enforce unique items in the options of prefer-logical-properties (b720cf8)
• enforce unique items in the options of prefer-logical-properties (#176) (b720cf8)
• update baseline data (#189) (9bdb155)

0.9.0 (2025-06-12)

Features

• add relative-font-units rule (#133) (ce256da)
• Validate property values containing variables (#148) (9fb07fa)

Bug Fixes

• Upgrade @eslint/css-tree to update syntax support (#173) (8909277), closes #159

0.8.1 (2025-05-16)

Bug Fixes

• improve use-baseline types regex (#137) (5ed6073)

0.8.0 (2025-05-15)

Features

• add no-important rule (#124) (af043db)
• allow custom descriptors in no-invalid-at-rules (#128) (df26df3)
• Update Baseline data (#130) (86aad6b)

Bug Fixes

• remove redundant Comment member from CSSSyntaxElement union (#119) (67f3d4e)

0.7.0 (2025-04-16)

Features

• Type checking for all APIs and rules (#103) (809ea4c)

Bug Fixes

• Set use-baseline to 'warn' in recommended config (#110) (2152e9d), closes #80

0.6.0 (2025-03-26)

⚠ BREAKING CHANGES

• Rename require-baseline -> use-baseline (#100)

Features

• CSS nesting baseline support (#87) (8fcae6c)
• Rename require-basline -> use-baseline (#100) (21b71b4), closes #96

Bug Fixes

• Add support period-separated layer names in use-layers rule (#92) (54b7da5)
• Catch more parse errors (#97) (d08df74)
• compute baseline status of individual features (#82) (3d91042)
• Don't check class names in require-baseline (#93) (b8d6356)
• expand supported types in baseline-data (#74) (96c3f95)

0.5.0 (2025-03-14)

Features

• add prefer-logical-properties rule (#63) (2a440ce)
• add selector support to require-baseline (#61) (9c7fd6a)
• add support for baseline years (#81) (4c70882)
• Switch to @eslint/css-tree (#83) (828a6eb)

0.4.0 (2025-02-19)

Features

• Add support for media conditions in require-baseline rule (#49) (ad9ddd7)

Bug Fixes

• require-baseline should not warn for cursor property (#52) (21b5aad), closes #51

0.3.0 (2025-02-14)

Features

• Add use-layers rule (#27) (6ebf57e)
• Allow custom syntax (#47) (397888b)
• require-baseline rule (#33) (c5f66fa)

Bug Fixes

• make types usable in CommonJS (#44) (0540006)
• Suppress var() validation errors (#45) (f526b1d), closes #40

0.2.0 (2025-01-07)

Features

• Add tolerant parsing mode (#38) (9e4b2dd), closes #29

Bug Fixes

• add type tests (#16) (f21e090)

0.1.0 (2024-11-26)

Features

• Add no-duplicate-imports rule (#4) (8d4558b)
• CSS language plugin (#2) (52d4f2c)
• no-invalid-properties rule (#11) (9b80bdd)
• no-unknown-at-rules -> no-invalid-at-rules (#12) (b90ee0e)
• no-unknown-at-rules rule (#7) (9a4d027)
• no-unknown-properties rule (#5) (43dec96)