Specification

https://drafts.csswg.org/css-sizing-4/#responsive-iframes

Explainer

https://github.com/w3c/csswg-drafts/blob/main/css-sizing-4/responsive-iframes-explainer.md

Links

• Previous early design review, if any: none
• An introduction to the feature, aimed at unfamiliar audiences: https://drafts.csswg.org/css-sizing-4/#responsive-iframes
• A description of the problems that end-users were facing before this proposal: https://github.com/w3c/csswg-drafts/blob/main/css-sizing-4/responsive-iframes-explainer.md#problem-description
• Alternatives considered: none
• Examples of how to use the proposal to solve the end-users' problems: https://github.com/w3c/csswg-drafts/blob/main/css-sizing-4/responsive-iframes-explainer.md#example
• What do the end-users experience with this proposal: https://w3ctag.github.io/explainer-explainer/#describe-proposal
• User research you did to validate the problem and/or design, if any: none
• Web Platform Tests: https://wpt.fyi/results/css/css-sizing/responsive-iframe?label=experimental&label=master&aligned

The specification

• Follows the Web Platform Design Principles.
• Includes Security and Privacy Considerations sections based on answers to the Security/Privacy Questionnaire.

Where and by whom is the work is being done?

• GitHub repo: https://github.com/kojiishi/csswg-drafts
• Primary contacts:
  • @kojiishi, Google, Chromium implementer
  • @bfgeek, Google, Chromium implementer
  • @chrishtr, Google, Chromium implementer
  • @tabatkins, Google, spec editor
  • @atanassov, Microsoft, CSS WG chair
  • @astearns, Adobe, CSS WG chair
• Organization/project driving the specification:
• This work is being funded by:
• Primary standards group developing this feature: CSS WG
• Group intended to standardize this work: CSS WG
• Incubation and standards groups that have discussed the design:
  • WHATWG https://github.com/whatwg/html/issues/555

Feedback so far

• Multi-stakeholder feedback:
  • Chromium comments: positive
  • Mozilla comments: https://github.com/mozilla/standards-positions/issues/1394
  • WebKit comments: https://github.com/WebKit/standards-positions/issues/653
  • https://github.com/w3c/csswg-drafts/blob/main/css-sizing-4/responsive-iframes-explainer.md#use-cases
• Major unresolved issues with or opposition to this specification: https://github.com/w3c/csswg-drafts/issues/13589
• Status/issue trackers for implementations:
  • Chrome Status

You should also know that...

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