CHANGELOG.md

Changelog

2.28.0 (2026-04-13)

Features

• css: Add and fix -webkit-border-start/end/before/after-* (#1061) (903bf40)
• css: add schema validation and supplementary documentation for custom properties (#1057) (fd3122b)
• css: Update syntax and initial value for rx ry (#1058) (2e4cbca)

2.27.1 (2026-02-13)

Miscellaneous

• fr: translation and update of strings (#1043) (aaa7252)

2.27.0 (2026-01-29)

Features

• css: add caret-animation (#1039) (ef18b7f)
• css: add column-height + column-wrap (#1038) (95d0b81)
• css: add corner-shape (#1040) (103dcdc)
• css: add remaining missing formal definitions (#1041) (b59751e)
• css: add scroll-marker-group + scroll-target-group (#1036) (9818bbf)

2.26.0 (2026-01-09)

Features

• css: Update position-anchor data to include none (858754e)

Bug Fixes

• css/properties: visibility has discrete animation type (#1026) (1e102cb)
• remove unnecessary whitespace in 'syntax' members (#1023) (acf8de2)

Miscellaneous

• deps-dev: bump ajv from 6.12.6 to 7.2.4 (#1028) (9338b1f)
• deps-dev: bump better-ajv-errors from 2.0.2 to 2.0.3 (#1033) (8def48a)
• deps: bump node from v22 to v24 (#1031) (d05bb58)
• l10n: update zh-TW translation (#719) (f1e5757)

2.25.0 (2025-10-31)

Features

• css: Update attr() syntax to CSS Values Level 5 (#1015) (d105f7e)
• css: Update syntax for cursor (#1009) (1e013f3)
• css: Update syntax for cursor property (1e013f3)

Miscellaneous

• CODEOWNERS: add Engineering for workflows and CODEOWNERS (#1014) (25fbde6)
• css: Update group field for css selectors (#965) (632fd10)
• npm: migrate to Trusted Publishing (#1021) (e78c3bf)

2.24.0 (2025-08-13)

Features

• css: Add anchor-center keyword value support for {align,justify}-{items,self} (#982) (58d5371)
• css: Simplify syntax for border-spacing (#991) (cf71325)
• css: Simply syntax for border-spacing (cf71325)
• css: Update syntax for appearance (#986) (4c63ed1)
• css: Update syntax for border-*-radius (#989) (464fe0a)
• css: Update syntax for border-image-* (#990) (377f8d8)
• css: Update syntax for bottom top left right (#983) (1a3d1dd)
• css: Update syntax for content property (#976) (c5111ee)
• css: Update syntax for margin-* (#984) (8008a3d)
• css: Update syntax of mix-blend-mode (#988) (d3fd073)
• css: Update the syntax for background-* (#987) (c892cd5)
• css: Update the syntax to match the spec (c892cd5)

2.23.0 (2025-07-16)

Features

• css: Update syntax for animation-duration (#985) (5f8c626)

Bug Fixes

• css: Remove broken links (ffbeedf)

2.22.1 (2025-07-01)

Miscellaneous

• deps: bump node from v20 to v22 (#997) (bc192b0)

2.22.0 (2025-06-24)

Features

• css: Add view-transition-name: match-element (#995) (a2da61c)
• css: Add data for font-width (#972) (980e137)
• css: Add data for ruby-overhang (#967) (f54b7ab)
• css: Add data for stroke-color (#963) (a5ff0b3)
• css: Update syntax for @counter-style/pad descriptor (#979) (bd9b855)
• css: Update syntax for font (#992) (81fa08f)

Bug Fixes

• css: Rename <cubic-bezier-timing-function> to <cubic-bezier-easing-function> (#970) (0374e4f)
• css: Rename cubic-bezier-timing-function to cubic-bezier-easing-function, fixes #968 (0374e4f)

Miscellaneous

• deps-dev: bump better-ajv-errors from 1.2.0 to 2.0.2 (#994) (1254a45)

2.21.0 (2025-04-11)

Features

• css: Update syntax for @counter-style/additive-symbols descriptor (#978) (61a3662)
• css: Update syntax for @page/size descriptor (#977) (f56fae7)

Miscellaneous

• css: Fix typo (#975) (8bf5a33)

2.20.0 (2025-04-07)

Features

• css: Add data for ::checkmark (#960) (ad9ebf0)
• css: Add data for ::picker-icon (#961) (a2b6f97)
• css: Add data for ::picker() (#962) (931d63d)
• css: Add data for <text-edge> (#959) (c7acf92)
• css: Add data for baseline-shift (#957) (25e6f28)
• css: Add data for object-view-box (#969) (20a9429)
• css: Add data for scroll-initial-target (#964) (9f08805)
• css: Fix syntax for font-size (4866a9d)
• css: Fix syntax for view-timeline (4318469)
• css: Update syntax for [@keyframes](https://github.com/keyframes) (#954) (767a605)
• css: Update syntax for *-conic-gradient() (#947) (4277471)
• css: Update syntax for *-linear-gradient() (#948) (f9775b1)
• css: Update syntax for *-radial-gradient() (#950) (f9066d3)
• css: Update syntax for <basic-shape> (#971) (d4bc9b3)
• css: Update syntax for container-type (#955) (8ffa50e)
• css: Update syntax for font-size (#945) (4866a9d)
• css: Update syntax for view-timeline (#946) (4318469)
• css: Update syntax for gradient related features (#949) (503b88f)

Bug Fixes

• Replace Markdown formatting with HTML (#974) (a7c5cb3)

Miscellaneous

• css: Mark ::cue-region as experimental (#966) (8c84202)
• css: merge CSS Units group into CSS Values and Units (#879) (c6f42b0)
• css: Rename CSS Positioning group to CSS Positioned Layout group (#923) (3660ce1)
• css: Sync features's status with bcd (#943) (d473c4f)

2.19.0 (2025-03-31)

Features

• add [@container](https://github.com/container) at-rule (#853) (a11537c)
• css: Add :open (2e6ee08)
• css: Add data for :open (#953) (2e6ee08)
• css: Add data for alignment-baseline (#956) (820cf9b)
• css: Update syntax for <easing-function> (#951) (1b834c8)
• css: Update syntax for <generic-family> (#952) (1fd7137)

Miscellaneous

• css: Adjust feature order by alphabet (#944) (ddc6e0d)

2.18.0 (2025-03-10)

Features

• css: Add data for :target-current ::scroll-marker ::scroll-marker-group (#941) (7e25ddc)
• css: Add data for view-transition-class (#940) (6f35883)

2.17.0 (2025-02-26)

Features

• css: Sync syntax for some css functions (#938) (de14073)

Miscellaneous

• css: Add mdn_url for newly documented features (#937) (7384ff1)
• css: Update status for :has-slotted (#936) (43ac794)

2.16.0 (2025-02-24)

Features

• css: Add @view-transition/types (#887) (451f3bf)
• css: Add css symbols() function (#905) (2f71ad9)
• css: Add CSS Shadow Parts group to ::part() (#892) (d8fbd6a)
• css: Add data for experimental speak-as property (#889) (2cfb53a)
• css: Add missing rect() and xywh() functions (#927) (90a3446)
• css: Add rest standard selectors (510bd92)
• css: Add rest two standard selectors (#893) (510bd92)
• css: Update filter-function-list to filter-value-list (#897) (34b32b1)
• css: Update group definitions for CSS View Transitions (#894) (76a3bbe)
• css: Update group value for CSS Lists and Counters group (#898) (0cd5a25)
• css: Update status for page-break-* properties (#909) (51fec53)
• css: Update synatx for css zoom property (#901) (5c57b10)
• css: Update syntax for @font-face/font-display (#875) (8cf4abe)
• css: Update syntax for an+b type (#907) (ffeb23b)
• css: Update syntax for circle() and ellipse() functions (#928) (fbc345f)
• css: Update syntax for outline (#877) (8791748)
• css: Update syntax for path() & polygon() (#885) (7b41d05)
• css: Update syntax for text-transform:math-auto (#896) (3c1a279)
• css: Update syntax for white-space (#878) (14ad879)
• css: Update syntax for color functions (#867) (b172f0a)

Miscellaneous

• ci: remove unused workflows (#920) (a4c3d9b)
• css: Add align-* and justify-* properties with CSS Flexible Bo… (#912) (74a60ad)
• css: Add align-* and justify-* properties with CSS Flexible Box Layout group (74a60ad)
• css: Add CSS Anchor Positioning group (#922) (0c3a40b)
• css: Fix group for clip-rule (#925) (abca3c7)
• css: Fix group for shape-rendering (#926) (b8cd457)
• css: Fix group for css env() function (#915) (6c947bc)
• css: FIx group for CSS Box Sizing (#914) (9c304df)
• css: Fix group for CSS Display module features (#916) (e19ddbd)
• css: Fix group for CSS Images module (#935) (068de27)
• css: Fix group for some CSS Inline module feature (#921) (925fbc4)
• css: Fix group key for text-overflow (#910) (7000695)
• css: Fix group value for CSS Overscroll Behavior features (#917) (e3976c9)
• css: Fox group for CSS Display module features (e19ddbd)
• css: Remove never used CSSOM View group (#904) (10abfad)
• css: Remove non-existent 'CSS Flexible Lengths' group (#913) (015220c)
• css: Remove not existed CSS Flexible Lengths group (015220c)
• css: Rename CSS Columns to CSS Multi-column Layout (#919) (8debe78)
• css: Rename CSS Device Adaptation to CSS Viewport (#900) (0ade227)
• css: Rename CSS Logical Properties to CSS Logical Properties and Values (#929) (9ba094b)
• css: Rename CSS Motion Path to Motion Path (#902) (9138aa7)
• css: Rename CSS Pages group to CSS Paged Media group (#918) (34b49a3)
• css: Rename CSS Scrollbars to CSS Scrollbars Styling to match spec (#895) (79d0ace)
• css: Update for CSS Generated Content group (#890) (8060a0a)
• css: Update group for [@import](https://github.com/import) (#908) (194f3b0)
• css: Update group for paint() function (#891) (845020b)
• css: Update group for CSS Animations (#931) (4186fe3)
• css: Update group for CSS Fonts (#932) (b6ec854)
• css: Update group for CSS Text (#933) (68917b2)

2.15.0 (2025-01-16)

Features

• css: Add data for css [@view-transition](https://github.com/view-transition) at-rule (#851) (f326618)
• css: add legacy -webkit-user-select property (#864) (37b9934)
• css: add missing :modal pseudo-classes (#862) (314b1ce)
• css: Add missing anchor-side syntax for anchor() (#860) (774d6c5)
• css: add missing anchor-size syntax for anchor-size() (#861) (37bf01a)
• css: add missing css color-mix() function (#857) (3fe902e)
• css: Add missing css color() function (397906c)
• css: Add missing css color() function (#858) (397906c)
• css: add missing pseudo classes [a-c] (#871) (7a57280)
• css: add missing pseudo classes [h-m] (#872) (59d6142)
• css: add missing pseudo classes [p-s] (#873) (10e61fd)
• css: add missing pseudo classes [v-x] (#874) (a8104c4)
• css: add missing pseudo elements (#868) (23379df)
• css: Add/Fix interfaces field of at-rules (#856) (20f0bab)
• css: consistent naming for function-like pseudo-classes (#865) (8d17ec8)
• css: Remove lack-support, deprecated input-security (#863) (857fe8d)
• css: remove mdn_url for all IE features (#847) (edf11bb)
• css: Remove mdn_url for some obsolute/experiemental features (#849) (fd7fc88)
• css: Remove never-supported obsolute azimuth feature (#832) (c4ab0f3)
• css: Replace <box> type with <visual-box> type (#842) (57b11d6)
• css: Update css2 syntax for some pseudo-elements (#866) (7798a1c)
• css: Update synatx for background-origin (#838) (aa45cc7)
• css: Update syntax for @font-face/unicode-range (#833) (5186311)
• css: Update syntax for [-webkit]-mask-{clip,origin} (#839) (c73adfe)
• css: Update syntax for background-clip (#835) (76d7860)
• css: Update syntax for image-rendering property smooth value (#834) (22b6586)
• css: Update syntax of filter functions for optional parameters (#886) (a3814e6)
• css: Update/Extra <color> syntax (ec560a1)
• css: Update/Extract <color> syntax (#859) (ec560a1)
• css: Update/Remove mdn_url and update status for Masonry layout related features (#848) (0457a47)
• css: Update&Fix mdn_url for some obsolute/experiemental features (fd7fc88)

Bug Fixes

• css: Add group field for CSS Box Sizing module (#855) (97536bb)
• css: Fix group field for CSS Containment module (#854) (7f652b0)
• css: Fix mdn_url for functions (#840) (ec24bf4)
• css: Fix mdn_url for selectors and types (#836) (f5689dc)
• css: fix status for custom properties (#846) (aa28a80)
• css: incorrect mdn_url for repeating-radial-gradient() (#844) (0500654)
• css: Remove mdn_url for some firefox prefixed features (#850) (3c40733)

Miscellaneous

• css: Remove CSS Miscellaneous group & Rename CSS Variables group (#882) (5edb039)
• css: remove never used CSS Break group (#880) (0435f3a)
• css: Remove never used CSS Regions group (#884) (448b41a)
• css: remove not-supported for text-spacing-trim: {trim-both,trim-all,auto} (395971d)
• css: remove not-supported values for text-spacing-trim (#870) (395971d)
• css: remove support for white-space-collapse: discard (#869) (13074e5)
• css: Replace CSS Charsets group with CSS Syntax group (#883) (9376284)

2.14.0 (2024-12-17)

Features

• css: Add data for text-box-* (#826) (ba25aa2)
• css: add missing calc-size() function (#823) (1ea6782)
• css: add missing css functions (#827) (a93d2bb)
• css: add missing css functions (#829) (9fe3138)
• css: add missing css functions to syntaxes (#824) (e403676)
• css: Update syntax for CSS logical properties (#820) (6b4cae7)

Bug Fixes

• css: correct syntax for scale related css functions (#831) (955ef5b)
• css: fix animate type of scrollbar-width (#825) (1f30436)
• css: fix group for clamp() css function (#830) (424e985)
• l10n: fix incorrect punctuation marks (#822) (8059106)

2.13.0 (2024-12-05)

Features

• css: Add data for lighting-color, flood-color, flood-opacity (#787) (2e42c31)
• css: Add data for stop-color & stop-opacity (#782) (9398267)
• css: add mdn_url for features with documentations (#803) (dd04e07)
• css: Add missing <anchor-name> syntax for position-anchor property (#792) (350f183)
• css: Add missing <position-area> syntax for position-area property (#793) (3722a02)
• css: Add missing <try-size> syntax for position-try-order property (#796) (0b93566)
• css: Add missing <try-tactic> syntax for position-try-fallbacks property (#795) (76584aa)
• css: Add missing syntax &lt;coord-box&gt; <offset-path> for offset-path property (#790) (8438947)
• css: Add missing syntax <dasharray> for stroke-dasharray (#791) (df08f67)
• css: add missing syntax for offset-path property (8438947)
• css: Add missing syntax for stroke property (#783) (89c2196)
• css: Allow at-rule descriptors also contain mdn_url key (#805) (7ebbdfa)
• css: Fix/Add synatx for font-palette <palette-identifier> palette-mix() (#785) (d572bcb)
• css: make at-rule descriptor also contain mdn_url key (7ebbdfa)
• css: remove non-supported caption-side values (#818) (f0b8774)
• css: Support for word-break:auto-phrase (#810) (12e6074)
• css: sync at-rule status per bcd (9c8b9eb)
• css: Sync at-rule status per bcd (#800) (9c8b9eb)
• css: sync property status per bcd (06fa694)
• css: Sync property status per bcd (#801) (06fa694)
• css: sync selector status per bcd (31d4ebe)
• css: Sync selector status per bcd (#799) (31d4ebe)
• css: Update <alpha-value> usage (#784) (87dc78b)
• css: Update padding properties (#816) (8a9f3e2)
• css: Update syntax for outline-style (#808) (14605dc)
• css: Update syntax for at_font-palette-values/override-colors (#780) (6f8e474)
• css: Update syntax for fit-content() (#814) (cd9f7ce)
• css: Update syntax for margin properties (#815) (8d9f939)
• css: Update syntax for sizing properties (#813) (cd06f28)

Bug Fixes

• add missing syntax for [@scope](https://github.com/scope) (0a8c8b6)
• css: Add missing syntax <single-animation-composition> for animation-composition (#789) (e76c914)
• css: Add missing syntax for [@scope](https://github.com/scope) (#788) (0a8c8b6)
• css: fill-opacity should accept percentages (#786) (42dcf9e)
• css: Fix incorrect mdn_url (#804) (f432647)
• css: Fix syntax for scroll-timeline-name (#809) (f050f8b)
• css: Fix syntax for text-wrap (#781) (1b708b3)
• css: Fix syntax for white-space (#802) (2cc41d0)
• css: make functions syntax consistent (#817) (eeffb3f)
• css: Mark <shape> type as obsolete (#797) (c8067ba)
• css: mark element() as experimental (10594fb)
• css: Mark element() as experimental (#798) (10594fb)

2.12.2 (2024-11-05)

Bug Fixes

• css: stroke-opacity syntax correction (#778) (8c66896)
• Update syntax for 'forced-color-adjust' & 'scale' properties, 'axis', 'color', 'scroller', 'system-color' types (#771) (39f2aed)

2.12.1 (2024-10-29)

Bug Fixes

• css: aspect-ratio value supports both 'auto' and 'ratio' together (4fa8523)

2.12.0 (2024-10-23)

Features

• add data for interpolate-size property (#773) (43873fc)
• added auto value to text-emphasis-position property (#772) (c4ac978)
• rename inset-area to position-area (#769) (d2b8857)
• update text-wrap to be a shorthand property (#774) (2213097)
• update syntax for Anchor Positioning related properties (#770) (5f5c637)

Bug Fixes

• add mdn url for CSS offset-anchor (#759) (991632c)
• link: fix link to stacking context (#768) (793cb7a)

Miscellaneous

• css: remove column-fill: balance-all (#775) (97b010c)
• update linear-gradient syntax to use optional color-interpolation-method (#766) (9d0f4c5)

2.11.1 (2024-09-11)

Miscellaneous

• deps: bump actions/checkout from 3 to 4 (#764) (3c2be02)
• deps: bump github/codeql-action from 2 to 3 (#763) (251e6e2)

2.11.0 (2024-09-09)

Features

• ci: Update depbot to check GH actions (#761) (f1ba782)
• css: Add stroke CSS SVG properties (#757) (e577bd0)
• Update depbot to check GH actions (f1ba782)

Bug Fixes

• CSS zoom should be a not animatable property (#748) (3183e91)

2.10.0 (2024-08-29)

Features

• add CSS SVG d and fill-* properties (#754) (7384073)
• add CSS SVG geometric properties (#753) (ab6bf8a)
• Add marker CSS SVG properties (#756) (ebe6b02)

Bug Fixes

• css: follow canonical order in border and outline sections (#749) (b703067)
• position-try-options > position-try-fallbacks (#751) (0edc1ea)

Miscellaneous

• add CODEOWNERS for auto-adding reviewers (#760) (cae4438)

2.9.0 (2024-07-03)

Features

• css: add text-spacing-trim property (bb0a599)

Bug Fixes

• css/functions: update path mdn_url (#739) (946c423)
• l10n/css: replace removed macros (#745) (b9dcf29)

2.8.0 (2024-05-21)

Features

• correct ray() syntax and add ray-size type (311ca78)
• css: correct ray() syntax + add ray-size type (#723) (311ca78)

2.7.0 (2024-05-10)

Features

• css: add field-sizing property (#718) (3df37e7)

2.6.1 (2024-04-24)

Bug Fixes

• Add missing internationalization information (#731) (19b1a46)

2.6.0 (2024-04-18)

Features

• css: add Anchor Positioning data (b3997c5)

2.5.0 (2024-04-08)

Features

• css: text-wrap-mode + text-wrap-style (2e681ff)

Bug Fixes

• lint: upgrade actions/{checkout,setup-node} to v4 + use node-version-file (b62c9ee)
• package-lock: run npm install (#725) (dfad8d6)

Enhancements

• publish-release: inline workflow action + allow manual execution (#724) (063fc20)

Miscellaneous

• css: update appliesTo for align-content (603c07a)

2.4.2 (2024-02-27)

Bug Fixes

• css: overflow-wrap applies to text elements (#705) (6732de5)
• Update font-palette animation type (#716) (cd8d5db)

2.4.1 (2024-02-22)

Bug Fixes

• css: replace value 'center' with '0% 0%' for mask-position inital value (#714) (2987ea9)

2.4.0 (2024-01-23)

Features

• css: alsoAppliesTo data for bg-pos-x/bg-pos-y (#707) (90bc67c)

2.3.6 (2024-01-23)

Bug Fixes

• css: Update the default/initial value of offset-position (#709) (d619c73)

2.3.5 (2024-01-20)

Bug Fixes

• css: Remove ::first-line from margin* props (#706) (8858ac6)

2.3.4 (2024-01-15)

Bug Fixes

• css: Add some Japanese translations (#703) (5434132)

2.3.3 (2024-01-08)

Bug Fixes

• css: Fix scroll() definition format (#701) (60fd71f)

2.3.2 (2023-12-28)

Bug Fixes

• descriptions of discrete animation behavior between visible and hidden (#690) (eb3bd6b)

2.3.1 (2023-12-28)

Bug Fixes

• css: replace value 'invert' with 'auto' for outline-color property (#694) (89ff350)

2.3.0 (2023-11-08)

Features

• add data for @scope (#693) (c607a85)

2.2.0 (2023-11-03)

Features

• 28841 font synthesis position (#691) (5ced75f)

2.1.0 (2023-08-29)

Features

• CSS contain-intrinsic-* syntax updates (#684) (59748c3)

Bug Fixes

• css: Mark all 'text-emphasis*' properties inheritable (#685) (4382320)

2.0.33 (2023-08-21)

Features

• update CSS offset-path syntax (#680) (a609205)

Miscellaneous Chores

• release 2.0.33 (fa9c0e5)

2.0.32 (2023-05-12)

Miscellaneous Chores

• release 2.0.32 (6ff71b4)

2.0.31 (2023-02-03)

Bug Fixes

• scroll-timeline-axis and scroll-timeline-name are properties (#631) (7bb3805)

2.0.30 (2022-10-28)

Bug Fixes

• correct mask-repeat initial value (b36469e)
• correct scroll-timeline-axis and mask-repeat initial value (#622) (e48302d)
• correct scroll-timeline-axis initial value (5144622)

2.0.29 (2022-08-30)

Miscellaneous Chores

• release 2.0.29 (da9510f)

2.0.28 (2022-07-12)

Bug Fixes

• css: correct two syntax examples in selectors (#589) (91ab33a)

2.0.27 (2022-02-24)

Miscellaneous Chores

• release (a99ae2e)

2.0.26 (2022-01-19)

Miscellaneous Chores

• release 2.0.26 (8b1045d)

2.0.25 (2021-12-21)

Bug Fixes

• change branch reference to main (a473261)
• remove old clashing workflow (af9a18c)

Miscellaneous Chores

• release 2.0.25 (db5a54b)
• release 2.0.25 (0f453ee)

2.0.24 (2021-12-17)

Miscellaneous Chores

• release 2.0.24 (4d00c38)

2.0.24 (2021-12-15)

Miscellaneous Chores

• release 2.0.24 (abff6ff)