Spec review for Animation.progress

[DavMila]

こんにちは TAG-さん!

I'm requesting a TAG review of Animation.progress.

This feature adds a "progress" property to the JavaScript class Animation. The goal of this property is provide authors a convenient and consistent representation of how far along an animation has advanced across its iterations and regardless of the nature of its timeline.

• Explainer¹: https://github.com/DavMila/explainer-animation.progress
• Specification: https://drafts.csswg.org/web-animations-2/#the-progress-of-an-animation
• WPT Tests:
  • https://wpt.fyi/results/web-animations/interfaces/Animation/progress.tentative.html?label=master&label=experimental&aligned&q=web-animations%2Finterfaces%2Fanimation%2Fprogress.tentative.html
  • https://wpt.fyi/results/web-animations/interfaces/Animation/scroll-timeline-progress.tentative.html?label=master&label=experimental&aligned&q=web-animations%2Finterfaces%2Fanimation%2Fscroll-timeline-progress.tentative.html
• User research: N/A
• Security and Privacy self-review²: This feature has no known privacy/security concerns.
• GitHub repo: None
• Primary contacts:
  • David Awogbemila (@DavMila), Google, Developer
  • Robert Flack (@flackr), Google, Developer
• Organization/project driving the specification: CSS Working Group
• Multi-stakeholder support³:
  • Chromium comments: Implemented as an experimental feature, crbug.com/40914396
  • Mozilla comments: Animation.progress mozilla/standards-positions#1073
  • WebKit comments: Animation.progress WebKit/standards-positions#398
• Status/issue trackers for implementations⁴: Chromestatus

Further details:

• I have reviewed the TAG's Web Platform Design Principles
• Relevant time constraints or deadlines: Chrome would like to ship whenever possible.
• The group where the work on this specification is currently being done: CSS Working Group
• Major unresolved issues with or opposition to this specification:
  • [web-animations-2] Progress APIs w3c/csswg-drafts#8799 (comment) (whether to clamp to [0,1])
• This work is being funded by: Google

[torgo]

Hi @DavMila - just a quick question: you've indicated "CSS working group" as where this work is being done. However it doesn't seem to be in the CSS repo... is this an official CSS working draft or is it that the intention is to submit it to the CSS working group? Thanks! ✨

[DavMila]

Hi @DavMila - just a quick question: you've indicated "CSS working group" as where this work is being done. However it doesn't seem to be in the CSS repo... is this an official CSS working draft or is it that the intention is to submit it to the CSS working group? Thanks! ✨

Thanks for the question. It's in the web-animations-2 spec in the official CSSWG repository for editor's drafts of CSS specifications . I don't think the web-animations-2 spec has been published as a working draft so it's still an editor's draft. So it has been submitted to the CSS working group as part of an editor's draft but not yet a working draft.