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[scroll-animation] Define when <code>ScrollTimeline.source</code> should update

Agenda+

scroll-animations-1Current WorkCurrent Work

Status: Open.

#13480 In w3c/csswg-drafts;

· dshin-moz opened on Feb 10, 2026

[scroll-animations-1] Use pseudo-element as the source of ScrollTimeline or subject of ViewTimeline

scroll-animations-1Current WorkCurrent Work

Status: Open.

#13471 In w3c/csswg-drafts;

· BorisChiou opened on Feb 9, 2026

[css-anchor-position-1][css-animations-2][scroll-animations-1] Fix name visibility for descendants

Closed Accepted by CSSWG Resolution

css-anchor-position-1

css-animations-2

Needs Edits

Needs Testcase (WPT)

scroll-animations-1Current WorkCurrent Work

Status: Open.

#13364 In w3c/csswg-drafts;

· flackr opened on Jan 16, 2026

[scroll-animations-1] Clarification on the computed value of <code>scroll-timeline-name</code> and <code>view-timeline-name</code>

scroll-animations-1Current WorkCurrent Work

Status: Open.

#13139 In w3c/csswg-drafts;

· weinig opened on Nov 22, 2025

[scroll-animations] <code>ViewTimeline</code> -&gt; allow to specify scroller (<code>source</code>)

scroll-animations-1Current WorkCurrent Work

Status: Open.

#12615 In w3c/csswg-drafts;

· nextend opened on Aug 18, 2025

[scroll-animations-1] [web-animations-2] at progress timeline boundary and animation ranges

scroll-animations-1Current WorkCurrent Work

web-animations-2Current WorkCurrent Work

Status: Open.

#12134 In w3c/csswg-drafts;

· graouts opened on Apr 29, 2025

[scroll-animations-1] it is not clear when to update stale timelines

scroll-animations-1Current WorkCurrent Work

Status: Open.

#12120 In w3c/csswg-drafts;

· graouts opened on Apr 25, 2025

[scroll-animations-1] Behavior of a fixedpos view-timeline

scroll-animations-1Current WorkCurrent Work

Status: Open.

#12109 In w3c/csswg-drafts;

· ydaniv opened on Apr 22, 2025

[scroll-animations] should an infinite duration yield an exception for effects associated with a progress-based animation?

scroll-animations-1Current WorkCurrent Work

web-animations-2Current WorkCurrent Work

Status: Open.

#11804 In w3c/csswg-drafts;

· graouts opened on Feb 28, 2025

[web-animations-2] moving from a progress-based timeline to a monotonic timeline can yield incompatible timeline time and animation current time

scroll-animations-1Current WorkCurrent Work

web-animations-2Current WorkCurrent Work

Status: Open.

#11761 In w3c/csswg-drafts;

· graouts opened on Feb 21, 2025

[scroll-animations] <code>ScrollTimeline</code> constructor prose about default <code>source</code> should not link to the <code>scrollingElement</code> getter but rather a procedure to determine the scrolling element

cssom-view-1

scroll-animations-1Current WorkCurrent Work

Status: Open.

#11736 In w3c/csswg-drafts;

· graouts opened on Feb 18, 2025

[scroll-animations] should <code>ViewTimeline.startOffset</code> and <code>ViewTimeline.endOffset</code> be <code>CSSNumericValue?</code>

scroll-animations-1Current WorkCurrent Work

Status: Open.

#11707 In w3c/csswg-drafts;

· graouts opened on Feb 14, 2025