CSS Scoping; :has-slotted

[keithamus]

こんにちは TAG-さん!

I'm requesting a TAG review of :has-slotted.

The :has-slotted pseudo-class matches slot elements which have a non-empty list of slotted nodes. When :has-slotted matches a slot with fallback content, we can conclude that the fallback content is not being displayed.

• Explainer¹:https://drafts.csswg.org/css-scoping-1/#the-has-slotted-pseudo
• Specification:https://drafts.csswg.org/css-scoping-1/#the-has-slotted-pseudo
• WPT Tests: https://wpt.fyi/results/css/css-scoping?label=experimental&label=master&aligned
• User research:
• Security and Privacy self-review²:
• GitHub repo: https://github.com/w3c/csswg-drafts
• Primary contacts:
  • Keith Cirkel (@keithamus), Microsoft/GitHub, Implementer
  • Lea Verou (@LeaVerou), W3C Invited Expert, Specifier
• Organization/project driving the specification: Font Awesome / GitHub ?
• Multi-stakeholder support³:
  • Chromium comments:
  • Mozilla comments: CSS Scoping :has-slotted pseudo mozilla/standards-positions#1079
  • WebKit comments: CSS Scoping :has-slotted pseudo WebKit/standards-positions#404
  • {{...include feedback/review from developers, implementers, civil society, and others}}
• Status/issue trackers for implementations⁴:

Further details:

• I have reviewed the TAG's Web Platform Design Principles
• Relevant time constraints or deadlines:
• The group where the work on this specification is currently being done:
• 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:
• This work is being funded by:

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[jyasskin]

We discussed this in a breakout today and we don't see any architectural concerns with this, so we're happy for this to move forwards. Thank you!