TAG Review for CSS Values & Units Level 5

[fantasai]

안녕하세요 TAG씨!

I'm requesting a TAG review of CSS Values & Units Level 5.

This specification is the next level over CSS Values & Units Level 4 and introduces a variety of new functional notations as well as a syntax variation, see Changes/Additions List vs CSS Values and Units 4. (Note: Some aspects of this spec have received independent TAG review already, such as calc-size().)

• Explainer¹: No single document, but see the following per-feature issues:
  • Interpolation (mix()/progress()
  • "Comma upgrading"
  • random()/random-item()
  • first-valid()
  • sibling-count()/sibling-index()
• Specification: CSS Values & Units Level 5.
• WPT Tests: Some in https://wpt.live/css/css-values/
• User research: Not much, mostly ad-hoc.
• Security and Privacy self-review²: See https://www.w3.org/TR/css-values-5/#security
• GitHub repo: https://github.com/w3c/csswg-drafts/issues
• Primary contacts:
  • Tab Atkins (@tabatkins), Google, editor
  • Elika Etemad (@fantasai), Apple, editor
• Organization/project driving the specification: CSS Working Group
• Multi-stakeholder support³: See issues above. CSSWG works under strong consensus rules, and includes participation from Apple, Google, Mozilla, and others.
• Status/issue trackers for implementations⁴:

Further details:

• [x] I have reviewed the TAG's Web Platform Design Principles
• Relevant time constraints or deadlines: Some features are currently under active development.
• The group where the work on this specification is currently being done: CSSWG
• The group where standardization of this work is intended to be done (if different from the current group):
• Major unresolved issues with or opposition to this specification: No opposition, just a pile of issues and suggestions.
• This work is being funded by: CSSWG Members

[torgo]

We feel as this is a core competency for the working group and with our brief review we don't see anything that needs our further review.