2.10.0

https://www.w3.org/TR/2026/WD-css-image-animation-1-20260409/

.github/FUNDING.yml

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-github: [hail2u]

after/syntax/css/anchor-position-1.vim

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+syn keyword cssFontProp contained anchor-name anchor-scope position-area position-anchor position-try position-try-fallbacks position-try-order position-visibility
+syn keyword cssFontAttr contained span-left span-right span-x-start span-x-end self-x-start self-x-end span-self-x-start span-self-x-end span-all span-top span-bottom span-y-start span-y-end self-y-start self-y-end span-self-y-start span-self-y-end block-start block-end span-block-start span-block-end self-block-start self-block-end span-self-block-start span-self-block-end inline-start inline-end span-inline-start span-inline-end self-inline-start self-inline-end span-self-inline-start span-self-inline-end span-start span-end self-start self-end span-self-start span-self-end anchor-center most-width most-height most-block-size most-inline-size flip-x flip-y flip-block flip-inline flip-start dialog
+syn region cssFunction contained matchgroup=cssFunctionName start="\<anchor\(-size\)\=\s*(" end=")" oneline keepend
+syn match cssFontDescriptor "@position-try\>" nextgroup=cssFontDescriptorBlock skipwhite skipnl

after/syntax/css/anchor-position-2.vim

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+syn keyword cssFontAttr contained anchored

after/syntax/css/backgrounds-4.vim

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-syn keyword cssFontProp contained background-position-x background-position-y background-position-inline background-position-block corners corner-shape border-limit border-clip border-clip-top border-clip-right border-clip-bottom border-clip-left
-syn keyword cssFontAttr contained x-start x-end y-start y-end bevel scoop notch
+syn keyword cssFontProp contained background-repeat-x background-repeat-y background-repeat-inline background-repeat-block background-position-x background-position-y background-position-inline background-position-block background-tbd
+syn keyword cssFontAttr contained x-start x-end y-start y-end border-area text repeat-block repeat-inline

after/syntax/css/borders-4.vim

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+syn keyword cssFontProp contained border-top-radius border-right-radius border-bottom-radius border-left-radius border-block-start-radius border-block-end-radius border-inline-start-radius border-inline-end-radius corner corner-top-left-shape corner-top-right-shape corner-bottom-right-shape corner-bottom-left-shape corner-start-start-shape corner-start-end-shape corner-end-start-shape corner-end-end-shape corner-top-shape corner-right-shape corner-bottom-shape corner-left-shape corner-block-start-shape corner-block-end-shape corner-inline-start-shape corner-inline-end-shape corner-shape corner-top-left corner-top-right corner-bottom-left corner-bottom-right corner-start-start corner-start-end corner-end-start corner-end-end border-limit border-clip border-top-clip border-right-clip border-bottom-clip border-left-clip border-block-start-clip border-block-end-clip border-inline-start-clip border-inline-end-clip box-shadow-color box-shadow-offset box-shadow-blur box-shadow-spread box-shadow-position border-shape
+syn keyword cssFontAttr contained squircle bevel scoop notch sides corners
+syn region cssFunction contained matchgroup=cssFunctionName start="\<superellipse\s*(" end=")" oneline keepend

after/syntax/css/color-5.vim

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 syn keyword cssFontProp contained components
 syn keyword cssFontAttr contained relative-colorimetric absolute-colorimetric perceptual
-syn region cssFunction contained matchgroup=cssFunctionName start="\<color-mix\|device-cmyk\s*(" end=")" contains=cssCustomProp,cssFunction,cssColor,cssFunctionComma oneline
+syn region cssFunction contained matchgroup=cssFunctionName start="\<\(color-mix\|device-cmyk\|light-dark\|contrast-color\)\>\s*(" end=")" contains=cssCustomProp,cssFunction,cssColor,cssFunctionComma oneline
 syn match cssFontDescriptor "@color-profile\>" nextgroup=cssFontDescriptorBlock skipwhite skipnl

after/syntax/css/color-hdr-1.vim

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+syn keyword cssFontProp contained dynamic-range-limit
+syn keyword cssFontAttr contained standard constrained-high
+syn region cssFunction contained matchgroup=cssFunctionName start="\<dynamic-range-limit-mix\s*(" end=")" oneline keepend
+syn region cssFunction contained matchgroup=cssFunctionName start="\<hdr-color\s*(" end=")" keepend

after/syntax/css/conditional-5.vim

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-syn match cssFontDescriptor "@\(when\|else\)\>" nextgroup=cssFontDescriptorBlock skipwhite skipnl
+syn keyword cssFontProp contained container-type container-name container
+syn keyword cssFontAttr contained inline-size
+syn match cssFontDescriptor "@\(when\|else\|supports-condition\)\>" nextgroup=cssFontDescriptorBlock skipwhite skipnl

after/syntax/css/cssom-view-1.vim

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-syn keyword cssFontProp contained scroll-behavior
-syn keyword cssFontAttr contained smooth

after/syntax/css/display-4.vim

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+syn keyword cssFontProp contained reading-flow reading-order
+syn keyword cssFontAttr contained flex-visual flex-flow grid-rows grid-columns source-order force-hidden

after/syntax/css/easing-2.vim

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+syn region cssFunction contained matchgroup=cssFunctionName start="\<linear\s*(" end=")" oneline contains=cssValueInteger,cssValueNumber,cssValueLength,cssFunctionComma

after/syntax/css/env-1.vim

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+syn region cssFunction contained matchgroup=cssFunctionName start="\<env\s*(" end=")" oneline contains=cssValueInteger,cssValueNumber,cssValueLength,cssFunctionComma

after/syntax/css/fonts-4.vim

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-syn keyword cssFontProp contained font-synthesis font-synthesis-weight font-synthesis-style font-synthesis-small-caps font-synthesis-settings font-named-instance font-display ascent-override descent-override line-gap-override font-optical-sizing font-variation-settings font-palette font-variant-emoji font-presentation base-palette override-color
-syn keyword cssFontAttr contained emoji math fangsong swap fallback light dark contained system-ui contained ui-sans-serif ui-serif ui-monospace ui-rounded contained xxx-large contained historical-forms
+syn keyword cssFontProp contained font-synthesis font-synthesis-weight font-synthesis-style font-synthesis-small-caps font-synthesis-position font-named-instance font-display ascent-override descent-override line-gap-override font-optical-sizing font-variation-settings font-palette font-variant-emoji font-presentation base-palette override-color
+syn keyword cssFontAttr contained oblique-only emoji math fangsong swap fallback light dark contained system-ui contained ui-sans-serif ui-serif ui-monospace ui-rounded contained xxx-large contained historical-forms
 syn region cssFunction contained matchgroup=cssFunctionName start="\<\(stylistic\|styleset\|character-variant\|swash\|ornaments\|annotation\)\s*(" end=")" oneline keepend
 syn match cssFontDescriptor "@font-feature-values\>" nextgroup=cssFontDescriptorBlock skipwhite skipnl
 syn match cssFontDescriptor "@font-palette-values\>" nextgroup=cssFontDescriptorBlock skipwhite skipnl

after/syntax/css/forms-1.vim

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+syn keyword cssFontProp contained slider-orientation
+syn keyword cssFontAttr contained base left-to-right right-to-left top-to-bottom bottom-to-top
+syn keyword cssPseudoClassId contained picker-icon file-selector-button checkmark thumb track fill field-text clear-icon placeholder step-control step-up step-down field-component field-separator color-swatch low-value high-value optimal-value
+syn region cssPseudoClassFn contained matchgroup=cssFunctionName start="\<picker(" end=")" contains=cssStringQ,cssStringQQ
+syn region cssFunction contained matchgroup=cssFunctionName start="\<control-value\s*(" end=")" oneline keepend

after/syntax/css/gaps-1.vim

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+syn keyword cssFontProp contained column-rule-break row-rule-break rule-break column-rule-edge-inset-start column-rule-edge-inset-end column-rule-interior-inset-start column-rule-interior-inset-end row-rule-edge-inset-start row-rule-edge-inset-end row-rule-interior-inset-start row-rule-interior-inset-end rule-overlap row-rule-color rule-color row-rule-style rule-style row-rule-width rule-width row-rule rule
+syn keyword cssFontAttr contained intersection row-over-column column-over-row

after/syntax/css/grid-3.vim

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+syn keyword cssFontProp contained flow-tolerance item-track item-direction item-cross item-pack item-flow
+syn keyword cssFontAttr contained grid-lanes inline-grid-lanes

after/syntax/css/image-animation-1.vim

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+syn keyword cssFontProp contained image-animation
+syn keyword cssFontAttr contained stopped
+syn keyword cssPseudoClassId contained animated-image

after/syntax/css/inline-3.vim

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-syn keyword cssFontProp contained dominant-baseline alignment-baseline baseline-shift baseline-source text-edge leading-trim inline-sizing initial-letter initial-letter-align initial-letter-wrap
-syn keyword cssFontAttr contained central mathematical leading cap ex drop raise ideographic ideographic-ink
+syn keyword cssFontProp contained dominant-baseline alignment-baseline baseline-shift baseline-source line-fit-edge text-box text-box-edge text-box-trim inline-sizing initial-letter initial-letter-align initial-letter-wrap
+syn keyword cssFontAttr contained central mathematical leading cap ex drop raise ideographic ideographic-ink trim-start trim-end

after/syntax/css/mixins-1.vim

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+syn keyword cssFontProp contained result
+syn match cssFontDescriptor "@function\>" nextgroup=cssFontDescriptorBlock skipwhite skipnl

after/syntax/css/multicol-2.vim

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+syn keyword cssPseudoClassId contained column

after/syntax/css/overflow-3.vim

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-syn keyword cssFontProp contained continue overflow-clip-margin overflow-block overflow-inline scrollbar-gutter block-ellipsis line-clamp max-lines
+syn keyword cssFontProp contained continue overflow-clip-margin overflow-block overflow-inline scrollbar-gutter block-ellipsis line-clamp max-lines scroll-behavior
+syn keyword cssFontAttr contained smooth

after/syntax/css/overflow-5.vim

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+syn keyword cssFontProp contained scroll-marker-group
+syn keyword cssPseudoClassId contained scroll-marker-group scroll-marker target-current

after/syntax/css/page-3.vim

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-syn keyword cssFontProp contained marks bleed
+syn keyword cssFontProp contained marks bleed page-orientation

after/syntax/css/position-4.vim

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+syn keyword cssFontProp contained overlay
+syn keyword cssPseudoClassId contained backdrop

after/syntax/css/pseudo-4.vim

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-syn keyword cssPseudoClassId contained prefix postfix target-text spelling-error grammer-error file-selectors-button
+syn keyword cssPseudoClassId contained prefix suffix target-text spelling-error grammer-error file-selectors-button search-text details-content

after/syntax/css/rhythm-1.vim

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-syn keyword cssFontProp contained line-height-step block-step block-step-size block-step-insert block-step-align block-step-round
-syn keyword cssFontAttr contained margin up down nearest
+syn keyword cssFontProp contained block-step-size block-step-insert block-step-align block-step-round block-step line-height-step
+syn keyword cssFontAttr contained up down nearest

after/syntax/css/scroll-animations-1.vim

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-syn keyword cssFontProp contained scroll-timeline-name scroll-timeline-axis scroll-timeline view-timeline-name view-timeline-axis view-timeline-inset view-timeline animation-range animation-delay-start animation-delay-end
-syn keyword cssFontAttr contained entry exit
+syn keyword cssFontProp contained scroll-timeline-name scroll-timeline-axis scroll-timeline view-timeline-name view-timeline-axis view-timeline-inset view-timeline animation-range animation-delay-start animation-delay-end timeline-scope
+syn keyword cssFontAttr contained entry exit defer ancestor

after/syntax/css/scroll-snap-2.vim

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+syn keyword cssFontProp contained scroll-start-target
+syn keyword cssPseudoClassId contained snapped snapped-x snapped-y snapped-block snapped-inline

after/syntax/css/selectors-4.vim

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 syn match cssSelectorOp "[|]"
-syn keyword cssPseudoClassId contained scope current past future default valid required optional blank playing paused any-link local-link read-only read-write placeholder-shown in-range out-of-range user-invalid user-valid target-within defined modal fullscreen picture-in-picture seeking buffering stalled muted volume-locked autofill open closed
-syn region cssPseudoClassLang matchgroup=cssPseudoClassId start=":\(dir\|local-link\|current\|nth\(-last\)\=-col\|has\|where\)(" end=")" oneline
+syn keyword cssPseudoClassId contained defined any-link scope playing paused seeking buffering stalled muted volume-locked open popover-open modal fullscreen picture-in-picture read-only read-write placeholder-shown autofill default valid in-range out-of-range required optional user-valid user-invalid
+syn region cssPseudoClassLang matchgroup=cssPseudoClassId start=":\(where\|has\|dir\)(" end=")" oneline

after/syntax/css/selectors-5.vim

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+syn match cssSelectorOp "[||]"
+syn match cssSelectorOp "/[a-z:]\+/"
+syn keyword cssPseudoClassId contained defined local-link interest-source interest-target blank current past future heading
+syn region cssPseudoClassLang matchgroup=cssPseudoClassId start=":\(state\|headings\|nth-col\|nth-last-col\)(" end=")" oneline

after/syntax/css/shapes-1.vim

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 syn keyword cssFontProp contained shape-outside shape-image-threshold shape-margin
 syn keyword cssFontAttr contained margin-box
-syn region cssFunction contained matchgroup=cssFunctionName start="\<\(inset\|circle\|ellipse\|polygon\)\s*(" end=")" oneline keepend
+syn region cssFunction contained matchgroup=cssFunctionName start="\<\(inset\|circle\|ellipse\|polygon\|shape\)\s*(" end=")" oneline keepend

after/syntax/css/text-4.vim

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-syn keyword cssFontProp contained white-space-collapse white-space-trim text-space-trim text-wrap text-autospace text-spacing-trim text-spacing text-group-align wrap-before wrap-after wrap-inside hyphenate-character hyphenate-limit-zone hyphenate-limit-chars hyphenate-limit-lines hyphenate-limit-last line-padding word-boundary-detection word-boundary-expansion
-syn keyword cssFontAttr contained spread punctuation preserve-breaks preserve-spaces discard-inner discard-before discard-after pretty avoid-line avoid-flex pre-wrap-auto no-limit trim-start trim-end trim-adjacent space-start space-end space-adjacent space-first no-compress ideograph-alpha ideograph-numeric ideographic-space
+syn keyword cssFontProp contained white-space-collapse white-space-trim text-space-trim text-wrap text-autospace text-spacing-trim text-spacing text-group-align wrap-before wrap-after wrap-inside hyphenate-character hyphenate-limit-zone hyphenate-limit-chars hyphenate-limit-lines hyphenate-limit-last line-padding word-boundary-detection word-space-transform
+syn keyword cssFontAttr contained math-auto spread punctuation preserve-breaks preserve-spaces discard-inner discard-before discard-after pretty avoid-line avoid-flex pre-wrap-auto no-limit space-all trim-both space-first trim-all no-compress ideograph-alpha ideograph-numeric ideographic-space

after/syntax/css/transitions-2.vim

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+syn match cssFontDescriptor "@\(starting-style\)\>" nextgroup=cssFontDescriptorBlock skipwhite skipnl

after/syntax/css/ui-4.vim

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-syn keyword cssFontProp contained caret caret-shape
-syn keyword cssFontAttr contained fade underscore
-syn region cssFunction contained matchgroup=cssFunctionName start="\<fade\s*(" end=")" oneline keepend
+syn keyword cssFontProp contained caret-shape caret-animation caret interactivity interest-delay-start interest-delay-end interest-delay accent-color
+syn keyword cssFontAttr contained underscore inert

after/syntax/css/values-4.vim

@@ -1,3 +1,3 @@
 syn match cssValueLength contained "[-+]\=\d\+\(\.\d*\)\=\(rex\|cap\|rcap\|rch\|ic\|ric\|lh\|rlh\)"
 syn match cssValueLength contained "[-+]\=\d\+\(\.\d*\)\=\(s\|l\|d\)\=v\(h\|w\|i\|b\|min\|max\)"
-syn region cssFunction contained matchgroup=cssFunctionName start="\<\(mix\|min\|max\|clamp\|round\|mod\|rem\|a\=\(sin\|cos\|tan\)\|atan2\|pow\|sqrt\|hypot\|log\|exp\|abs\|sign\)\s*(" end=")" oneline keepend
+syn region cssFunction contained matchgroup=cssFunctionName start="\<\(min\|max\|clamp\|round\|mod\|rem\|a\=\(sin\|cos\|tan\)\|atan2\|pow\|sqrt\|hypot\|log\|exp\|abs\|sign\)\s*(" end=")" oneline keepend

after/syntax/css/values-5.vim

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+syn keyword cssFontProp contained interpolate-size
+syn keyword cssFontAttr contained numeric-only allow-keyword
+syn region cssFunction contained matchgroup=cssFunctionName start="\<\(\(\(media\|container\)-\)\=progress\|\(\(calc\|transform\)-\)\=mix\|cross-fade\|first-valid\|toggle\|if\|inherit\|random\(-item\)\=\|sibling-\(count\|index\)\|calc-size\)\s*(" end=")" oneline keepend

after/syntax/css/view-transitions-2.vim

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+syn keyword cssFontProp contained view-transition-class navigation types
+syn keyword cssPseudoClassId contained active-view-transition
+syn region cssPseudoClassFn contained matchgroup=cssFunctionName start="\<active-view-transition-type(" end=")" contains=cssStringQ,cssStringQQ

after/syntax/css/webvtt1.vim

@@ -1,2 +1,2 @@
-syn match cssPseudoClassId contained "::\<cue\(-region\)\=\>"
+syn keyword cssPseudoClassId contained cue cue-region
 syn region cssPseudoClassLang matchgroup=cssPseudoClassId start="::cue\(-region\)\=(" end=")" oneline