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CSS Route Matching
css-navigation-1 2026-07-07
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CSS Speech Module Level 1
css-speech-1 2026-07-02
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Selectors Level 4
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selectors-4 2026-07-02
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CSS View Transitions Module Level 2
css-view-transitions-2 2026-07-01
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CSS Overscroll Behavior Module Level 1
css-overscroll-1 2026-06-30
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CSS Conditional Rules Module Level 5
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css-conditional-5 2026-06-30
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Media Queries Level 5
mediaqueries-5 2026-06-29
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DoC: 1
CSS Gaps Module Level 1
css-gaps-1 2026-06-24
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CSS Color HDR Module Level 1
css-color-hdr-1 2026-06-24
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CSS Color Module Level 4
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css-color-4 2026-06-23
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CSS Containment Module Level 1
css-contain-1 2026-06-23
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DoC: 2017-cr
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DoC: 2017
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DoC: 2018-11-cr
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DoC: 2018-cr
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DoC: 2019-10-pr
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DoC: 2019-cr
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DoC: 2020-rec
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DoC: 2022-rec
CSS Containment Module Level 2
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css-contain-2 2026-06-23
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DoC: 2019-10-fpwd
CSS Snapshot 2026
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css-2026 2026-06-22
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CSS Basic User Interface Module Level 3 (CSS3 UI)
css-ui-3 2026-06-19
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DoC: 2012-2015
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DoC: 2015-2017
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DoC: 2017-2
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DoC: 2018
CSS Overflow Module Level 4
css-overflow-4 2026-06-19
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CSS Text Module Level 3
Current Work
css-text-3 2026-06-19
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DoC: cr-2020
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DoC: lc-2013
CSS Text Module Level 4
css-text-4 2026-06-19
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CSS Color Module Level 5
css-color-5 2026-06-18
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CSS Scroll Snap Module Level 1
Current Work
css-scroll-snap-1 2026-06-17
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DoC: 2015-12
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DoC: by-issue
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DoC: cr-2016-08
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DoC: cr-2016
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DoC: cr-2017-12
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DoC: cr-2018
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DoC: cr-2019
CSS Linked Parameters Module Level 1
css-link-params-1 2026-06-12
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CSS Values and Units Module Level 5
css-values-5 2026-06-12
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CSS Generated Content for Paged Media Module Level 3
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css-gcpm-3 2026-06-10
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CSS Syntax Module Level 3
css-syntax-3 2026-06-10
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DoC: LC-20131105
CSS Object Model (CSSOM) Module Level 1
cssom-1 2026-06-10
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Web Animations Module Level 2
Current Work
web-animations-2 2026-06-10
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CSS Display Module Level 3
Current Work
css-display-3 2026-06-05
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DoC: cr-2018
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DoC: cr-2020
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CSS Display Module Level 4
css-display-4 2026-06-05
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CSS Text Module Level 5
css-text-5 2026-06-04
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CSS Environment Variables Module Level 1
css-env-1 2026-05-28
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CSS Viewport Module Level 1
css-viewport-1 2026-05-28
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CSS Overflow Module Level 3
Current Work
css-overflow-3 2026-05-21
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CSS Pseudo-Elements Module Level 4
css-pseudo-4 2026-05-21
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Animation Triggers
animation-triggers-1 2026-05-21
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Selectors Level 5
selectors-5 2026-05-20
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CSS Flexible Box Layout Module Level 2
css-flexbox-2 2026-05-15
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CSS Spatial Navigation Module Level 1
css-spatial-nav-1 2026-05-14
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CSS Box Sizing Module Level 4
css-sizing-4 2026-05-14
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CSS Positioned Layout Module Level 3
Current Work
css-position-3 2026-05-14
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Scroll-driven Animations Module Level 1
scroll-animations-1 2026-05-14
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CSS Scrollbars Styling Module Level 1
css-scrollbars-1 2026-05-14
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CSS Inline Layout Module Level 3
css-inline-3 2026-05-13
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CSS Anchor Positioning Module Level 1
Current Work
css-anchor-position-1 2026-05-08
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CSS Backgrounds Module Level 4
css-backgrounds-4 2026-05-08
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CSS Box Alignment Module Level 3
css-align-3 2026-05-08
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CSS Flexible Box Layout Module Level 1
Current Work
css-flexbox-1 2026-05-08
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DoC: cr-2012
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DoC: cr-20160301
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DoC: cr-20160526
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DoC: cr-2017
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DoC: cr-2018
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DoC: lc-2012
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DoC: lc-20140325
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DoC: lc-20140925
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DoC: lc-20150514
CSS Color Adjustment Module Level 1
css-color-adjust-1 2026-05-07
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CSS Images Module Level 4
css-images-4 2026-05-07
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CSS Images Module Level 5
css-images-5 2026-05-07
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CSS Shapes Module Level 1
Current Work
css-shapes-1 2026-05-07
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DoC: cr-20141015
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DoC: lc-20131203
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DoC: lc-20140211
CSS Shapes Module Level 2
css-shapes-2 2026-05-06
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CSS Basic User Interface Module Level 4
Current Work
css-ui-4 2026-05-06
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DoC: fpwd-2015
CSS Grid Layout Module Level 3
css-grid-3 2026-05-06
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CSS Form Control Styling Module Level 1
css-forms-1 2026-05-05
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CSS Table Module Level 3
css-tables-3 2026-05-02
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DoC: ed-20160202
CSS Ruby Annotation Layout Module Level 1
css-ruby-1 2026-05-01
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DoC: wd-2014
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DoC: wd-2020
Motion Path Module Level 1
motion-1 2026-04-28
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CSS Masking Module Level 1
css-masking-1 2026-04-28
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DoC: lc-2013
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DoC: lc-2014
CSS Shadow Module Level 1
css-shadow-1 2026-04-28
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CSS Lists and Counters Module Level 3
css-lists-3 2026-04-28
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CSS Cascading and Inheritance Module Level 6
css-cascade-6 2026-04-28
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CSS Scroll Anchoring Module Level 1
css-scroll-anchoring-1 2026-04-28
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CSS Fonts Module Level 4
Current Work
css-fonts-4 2026-04-22
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CSS Animations Module Level 2
css-animations-2 2026-04-22
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CSS Transitions Module Level 2
css-transitions-2 2026-04-22
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CSS Text Decoration Module Level 4
css-text-decor-4 2026-04-20
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CSS Fonts Module Level 5
css-fonts-5 2026-04-16
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CSS Values and Units Module Level 3
css-values-3 2026-04-16
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History
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DoC: cr-2013
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DoC: cr-2015
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DoC: cr-2016
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DoC: cr-2018
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DoC: lc-2012
CSS Print Profile
css-print 2026-04-16
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CSS Fragmentation Module Level 4
css-break-4 2026-04-14
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CSS Cascading and Inheritance Module Level 5
css-cascade-5 2026-04-13
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CSS Image Animation Module Level 1
css-image-animation-1 2026-04-07
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CSS Custom Functions and Mixins Module Level 1
css-mixins-1 2026-04-07
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CSS Borders and Box Decorations Module Level 4
css-borders-4 2026-03-26
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Media Queries Level 4
Current Work
mediaqueries-4 2026-03-24
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History
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DoC: cr-2017-09-05
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DoC: wd-2016-01-26
CSSOM View Module Level 1
cssom-view-1 2026-03-20
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CSS Overflow Module Level 5
css-overflow-5 2026-03-17
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CSS Fill and Stroke Module Level 3
fill-stroke-3 2026-03-04
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CSS Paged Media Module Level 3
Current Work
css-page-3 2026-03-03
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CSS Scroll Snap Module Level 2
css-scroll-snap-2 2026-02-25
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CSS Easing Functions Module Level 2
Current Work
css-easing-2 2026-02-23
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CSS Multi-column Layout Module Level 1
Current Work
css-multicol-1 2026-02-16
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History
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DoC: 2011
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DoC: cr-2021
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DoC: dec-2020
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DoC: may-2021
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DoC: post-cr-2021
CSS Multi-column Layout Module Level 2
css-multicol-2 2026-02-16
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CSS Box Sizing Module Level 3
Current Work
css-sizing-3 2026-02-15
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CSS Rhythmic Sizing Module Level 1
css-rhythm-1 2026-02-12
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CSS Nesting Module Level 1
css-nesting-1 2026-02-05
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Filter Effects Module Level 1
Current Work
filter-effects-1 2026-02-03
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Issues
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PRs
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History
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DoC: lc-2015
CSS Animations Module Level 1
Current Work
css-animations-1 2026-01-23
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Issues
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PRs
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History
Filter Effects Module Level 2
filter-effects-2 2026-01-23
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History
DOMMatrix interface
matrix 2026-01-23
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History
CSS Writing Modes Module Level 4
Current Work
css-writing-modes-4 2026-01-20
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History
CSS Writing Modes Module Level 3
css-writing-modes-3 2026-01-18
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Issues
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PRs
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History
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DoC: cr-2014
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DoC: cr-2015
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DoC: cr-2018
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DoC: cr-2019
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DoC: lc-2013
CSS Regions Module Level 1
css-regions-1 2026-01-18
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History
CSS Indexes
indexes 2026-01-16
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History
CSS Mobile Text Size Adjustment Module Level 1
css-size-adjust-1 2026-01-14
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PRs
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History
CSS Conditional Values Module Level 1
css-conditional-values-1 2026-01-12
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Issues
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PRs
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History
CSS Font Loading Module Level 3
css-font-loading-3 2026-01-12
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PRs
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History
CSS Color Module Level 6
css-color-6 2026-01-11
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PRs
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History
Pointer-driven Animations Module Level 1
pointer-animations-1 2026-01-11
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PRs
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History
CSS Generated Content Module Level 3
css-content-3 2026-01-09
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History
CSS Custom Highlight API Module Level 1
css-highlight-api-1 2026-01-09
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CSS Line Grid Module Level 1
css-line-grid-1 2026-01-07
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CSS Transitions Module Level 1
Current Work
css-transitions-1 2026-01-06
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History
Cascading Style Sheets (CSS) Level 2
css2 2025-12-30
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History
CSS Round Display Module Level 1
css-round-display-1 2025-12-26
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History
CSS Positioned Layout Module Level 4
css-position-4 2025-12-25
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Issues
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PRs
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History
CSS Containment Module Level 3
css-contain-3 2025-12-22
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History
CSS Page Floats Module Level 3
css-page-floats-3 2025-12-22
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PRs
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History
CSS Cascading and Inheritance Level 3
css-cascade-3 2025-12-17
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Issues
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PRs
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History
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DoC: cr-2013
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DoC: cr-2016
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DoC: lc-2013
CSS Cascading and Inheritance Module Level 4
Current Work
css-cascade-4 2025-12-17
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PRs
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History
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DoC: cr-2016
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DoC: lc-2015
CSS Backgrounds and Borders Module Level 3
Current Work
css-backgrounds-3 2025-12-16
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PRs
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History
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DoC: cr-2014
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DoC: cr-2017
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DoC: lc-2009
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DoC: lc-2010
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DoC: lc-2012
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DoC: lc-2014
CSS Easing Functions Module Level 1
css-easing-1 2025-12-16
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PRs
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History
CSS Text Decoration Module Level 3
Current Work
css-text-decor-3 2025-12-16
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Issues
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PRs
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History
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DoC: cr-2013
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DoC: cr-2018
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DoC: lc-2013
CSS Images Module Level 3
Current Work
css-images-3 2025-12-15
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Issues
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PRs
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History
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DoC: cr-2012
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DoC: lc-2012
CSS Counter Styles Module Level 3
css-counter-styles-3 2025-12-13
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PRs
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History
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DoC: cr-20150203
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DoC: cr-20150611
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DoC: cr-2017
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DoC: lc-20130718
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DoC: lc-20140826
Compositing and Blending Module Level 2
Current Work
compositing-2 2025-12-13
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PRs
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History
Compositing and Blending Module Level 1
compositing-1 2025-12-12
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Issues
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PRs
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History
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DoC: cr-2014
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DoC: lc-2013
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DoC: lc-2014-2
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DoC: lc-2014
Geometry Interfaces Module Level 1
geometry-1 2025-12-12
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PRs
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History
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DoC: lc-2014
CSS Logical Properties and Values Module Level 1
css-logical-1 2025-12-12
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PRs
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History
CSS Conditional Rules Module Level 3
css-conditional-3 2025-12-07
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Issues
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PRs
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History
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DoC: cr-2013
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DoC: cr-2020
CSS Transforms Module Level 1
Current Work
css-transforms-1 2025-11-30
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Issues
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PRs
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History
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DoC: wd-2013
CSS Transforms Module Level 2
css-transforms-2 2025-11-30
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PRs
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History
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DoC: wd-2013
Proposals for the future of CSS Paged Media
css-page-4 2025-11-30
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PRs
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History
Web Animations Module Level 1
web-animations-1 2025-11-24
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PRs
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History
CSS Snapshot 2022
css-2022 2025-11-21
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PRs
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History
CSS Snapshot 2023
css-2023 2025-11-21
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PRs
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History
CSS Snapshot 2024
css-2024 2025-11-21
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PRs
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History
CSS Snapshot 2025
css-2025 2025-11-21
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PRs
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History
CSS Extensions Module Level 1
css-extensions-1 2025-11-05
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PRs
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History
CSS Anchor Positioning Module Level 2
css-anchor-position-2 2025-10-24
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Issues
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PRs
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History
CSS Snapshot 2020
css-2020 2025-10-24
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PRs
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History
CSS Box Model Module Level 3
css-box-3 2025-10-24
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PRs
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History
CSS Exclusions Module Level 1
css-exclusions-1 2025-10-22
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Issues
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PRs
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History
CSS Conditional Rules Module Level 4
css-conditional-4 2025-10-22
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Issues
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PRs
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History
CSS Fragmentation Module Level 3
Current Work
css-break-3 2025-10-22
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Issues
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PRs
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History
·
DoC: cr-2016
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DoC: lc-2015
CSS Box Model Module Level 4
Current Work
css-box-4 2025-10-21
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PRs
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History
CSS Custom Properties for Cascading Variables Module Level 1
Current Work
css-variables-1 2025-05-05
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Issues
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PRs
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History
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DoC: lc-20130620
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DoC: lc-20140506
CSS Custom Properties for Cascading Variables Module Level 2
css-variables-2 2025-05-05
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Issues
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PRs
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History
CSS View Transitions Module Level 1
Current Work
css-view-transitions-1 2025-02-16
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Issues
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PRs
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History
CSS Snapshot 2021
css-2021 2025-01-29
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Issues
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PRs
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History
CSS Namespaces Module Level 3
css-namespaces-3 2024-10-25
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PRs
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History
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DoC: 2
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DoC: 3
Non-element Selectors Module Level 1
selectors-nonelement-1 2024-01-24
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PRs
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History
CSS Generated Content for Paged Media Module Level 4
css-gcpm-4 2024-01-24
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Issues
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PRs
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History
CSS Values and Units Module Level 4
Current Work
css-values-4 2023-12-18
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Issues
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PRs
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History
CSS Grid Layout Module Level 1
css-grid-1 2023-10-30
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Issues
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PRs
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History
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DoC: cr-2016
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DoC: cr-2017
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DoC: wd-20150108
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DoC: wd-20150806
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DoC: wd-20150917
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DoC: wd-20160519
CSS Grid Layout Module Level 2
Current Work
css-grid-2 2023-10-30
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Issues
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PRs
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History
CSS Snapshot 2015
css-2015 2023-08-28
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Issues
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PRs
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History
CSS Snapshot 2017
css-2017 2023-08-28
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Issues
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PRs
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History
CSS Snapshot 2018
css-2018 2023-08-28
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Issues
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PRs
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History
CSS Expressive Generalizations and Gadgetry Level 1
css-egg-1 2023-02-21
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Issues
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PRs
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History
Resize Observer Module Level 1
resize-observer-1 2022-11-22
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Issues
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PRs
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History
CSS Will Change Module Level 1
css-will-change-1 2022-04-29
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Issues
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PRs
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History
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DoC: 20140429-wd
CSS Mobile Profile 2.0
css-mobile 2021-11-15
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Issues
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PRs
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History
Media Queries Level 3
mediaqueries-3
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Issues
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PRs
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History
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DoC: 2012-and-later
CSS Snapshot 2007
css-2007
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PRs
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History
CSS Snapshot 2010
css-2010
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PRs
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History
Moved to CSS Shadow Module Level 1
css-scoping-1
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PRs
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History
CSS Color Module Level 3
css-color-3
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Issues
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PRs
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History
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DoC: lc-2008
Selectors Level 3
selectors-3
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Issues
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PRs
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History
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DoC: lc-2009
CSS Fonts Module Level 3
css-fonts-3
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Issues
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PRs
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History
Web Animations CSS Integration
web-animations-css-integration
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Issues
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PRs
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History
CSS Pagination Templates Module Level 3
css-page-template-1
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Issues
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PRs
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History
CSS shaders
css-shaders-1
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Issues
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PRs
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History
Merged into CSS Shadow Module Level 1
css-shadow-parts-1
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Issues
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PRs
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History
CSS Presentation Levels Module
css-preslev-1
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Issues
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PRs
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History
CSS Style Attributes
css-style-attr-1
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Issues
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PRs
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History
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DoC: lc-2010
CSS Template Layout Module
css-template-1
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Issues
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PRs
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History
CSS TV Profile 1.0
css-tv
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Issues
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PRs
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History
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