Issues

• [css-animations] Setting CSSKeyframesRule.name to empty string

  css-animations-1
  w3c/csswg-drafts#14475 · Filter by author tuankiet65 opened on Sep 10, 2026

• [css-animations] How is a list of <easing-function> be handled when used for a keyframe specific animation-timing-function

  Agenda+css-animations-1
  w3c/csswg-drafts#14096 · Filter by author weinig opened on Jun 28, 2026
  15

• [css-color][css-animations] Is it specified anywhere that a color animation at time=0 exactly match the from color's computed value?

  css-animations-1css-color-5Needs Example or FigureNeeds Testcase (WPT)spec-test-mismatch
  w3c/csswg-drafts#13269 · Filter by author weinig opened on Dec 25, 2025
  10

• [css-animations-1][css-animations-2] Should any of the new animation-* longhands be forbidden in @keyframes ?

  css-animations-1css-animations-2Needs Edits
  w3c/csswg-drafts#12252 · Filter by author nt1m opened on May 29, 2025
  4

• [scroll-animations-1][css-animations-1] A non-animated "Is in viewport"

  css-animations-1scroll-animations-2
  w3c/csswg-drafts#10582 · Filter by author noamr opened on Jul 16, 2024
  7

• [css-animations-1] Undefined procedures to get/set CSSOM attributes

  css-animations-1
  w3c/csswg-drafts#9364 · Filter by author cdoublev opened on Sep 15, 2023
  1

• [css-animations] What should Event.timeStamp be for animation / transition events?

  css-animations-1
  w3c/csswg-drafts#9167 · Filter by author emilio opened on Aug 6, 2023
  1

• [css-animations-1] Upgrade old bug links

  css-animations-1
  w3c/csswg-drafts#8501 · Filter by author svgeesus opened on Feb 27, 2023
  2

• [css-nesting-1] Consider using ObservableArray<CSSRule> instead of CSSRuleList

  css-animations-1css-nesting-1cssom-1
  w3c/csswg-drafts#8350 · Filter by author domenic opened on Jan 23, 2023
  9

• [css-animations][css-transitions][web-animations] Introduce a host-syntax for color interpolation

  css-animations-1css-transitions-1web-animations-1
  w3c/csswg-drafts#7741 · Filter by author lilles opened on Sep 14, 2022
  7

• [css-animations] Detail how/when keyframe values are computed

  css-animations-1css-animations-2
  w3c/csswg-drafts#7335 · Filter by author LeaVerou opened on Jun 2, 2022
  3

• [css-color] color-mix() percentage normalization doesn't match animations.

  css-animations-1css-color-5
  w3c/csswg-drafts#7324 · Filter by author emilio opened on May 27, 2022
  4

• [css-animations-1] Clarify Keyframes.appendRule() and Keyframes.deleteRule()

  css-animations-1
  w3c/csswg-drafts#6972 · Filter by author cdoublev opened on Jan 21, 2022

• [css-animations] The "via" keyframe selector

  css-animations-1
  w3c/csswg-drafts#6151 · Filter by author vrugtehagel opened on Mar 26, 2021
  15

• [css-animation-events] Initially paused animations emit animationstart events

  css-animations-1css-animations-2
  w3c/csswg-drafts#6027 · Filter by author Media-Evil opened on Feb 22, 2021
  1

• [css-animations] Custom properties should appear in getKeyframes

  css-animations-1
  w3c/csswg-drafts#5126 · Filter by author andruud opened on May 28, 2020
  4

• [css-animations-1] Interaction of display:none parent with svg:use.

  css-animations-1
  w3c/csswg-drafts#4413 · Filter by author george-steel opened on Oct 11, 2019
  4

• [web-animations][css-animations][cssom-view][css-font-loading][resize-observer] Update spec to new IDL syntax for optional dictionaries

  css-animations-1css-animations-2css-font-loading-3cssom-view-1resize-observer-1web-animations-1web-animations-2
  w3c/csswg-drafts#4234 · Filter by author Ms2ger opened on Aug 22, 2019

• [css-animations] Negative time at start of animation shorthand

  css-animations-1
  w3c/csswg-drafts#4034 · Filter by author ewilligers opened on Jun 14, 2019
  4

• Animation and opacity clamping

  css-animations-1
  w3c/csswg-drafts#3340 · Filter by author ewilligers opened on Nov 24, 2018
  3

• [css-transforms-2] Serialization of individual transform when the animation is at 0% or 100%

  css-animations-1css-transforms-2web-animations-1
  w3c/csswg-drafts#3290 · Filter by author BorisChiou opened on Nov 7, 2018
  7

• [css-animations-1] Removing the target of an animation has different behaviour between CSS Animations, CSS Transitions and Web Animations

  css-animations-1
  w3c/csswg-drafts#2948 · Filter by author graouts opened on Jul 24, 2018
  3

• [css-animations] Clarify properties that are not allowed in @keyframes rule

  css-animations-1
  w3c/csswg-drafts#2736 · Filter by author hiikezoe opened on Jun 4, 2018
  13

  

• [css-animations] Serialize all keyframe names as strings

  css-animations-1Needs EditsNeeds Testcase (WPT)
  w3c/csswg-drafts#2435 · Filter by author csnardi opened on Mar 13, 2018
  25

• [css-animations] Clarify if synthesized 0% / 100% keyframes use the underlying animated style or the un-animated style

  css-animations-1
  w3c/csswg-drafts#1841 · Filter by author birtles opened on Oct 2, 2017