Explainer

https://github.com/MicrosoftEdge/MSEdgeExplainers/blob/main/AtRuleFeatureDetection/explainer.md

The explainer

• Includes the information requested by the Explainer Explainer.
• Follows the Web Platform Design Principles.
• Includes or links to answers to the Security/Privacy Questionnaire.
• Describes user research you did to validate the problem and/or design.

Where and by whom is the work is being done?

• GitHub repo: https://github.com/MicrosoftEdge/MSEdgeExplainers/tree/main/AtRuleFeatureDetection
• Primary contacts:
  • Kevin Babbit (@kbabbit), Microsoft, Software Engineer
  • Diego Gonzalez (@diekus), Microsoft, Program Manager
• Organization/project driving the design:
• This work is being funded by: Microsoft
• Incubation and standards groups that have discussed the design:
  • CSSWG F2F August 2025
• Standards group(s) that you expect to discuss and/or adopt this work when it's ready: CSSWG

Feedback so far

• Multi-stakeholder feedback:
  • Chromium comments:
  • Mozilla comments: https://github.com/mozilla/standards-positions/issues/1310
  • WebKit comments: https://github.com/WebKit/standards-positions/issues/565

You should also know that...

No response

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