Re: [csswg-drafts] [css-sizing] Should `contain-intrinsic-*: from-element` require `contain:size`? (#13182)

> I think it should be 4, and require not having size containment. Depending on the subresource seems antithetic to the nature of size containment.

Thanks for the reply. Do you have opinions on which should win? For example:
```css
iframe.responsive {
  contain: size;
  contain-intrinsic-block-size: 300px;
  new-property-for-responsive-iframe: 400px;
}
```
Should the intrinsic block size be 300px, or from-element (with default 400px)?

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Received on Thursday, 22 January 2026 06:22:33 UTC