@container size queries aren't clear about which box size is used #40306
Description
MDN URL
https://developer.mozilla.org/en-US/docs/Web/CSS/@container
What specific section or headline is this issue about?
Size container descriptors
What information was incorrect, unhelpful, or incomplete?
I think it's the same for all of the descriptors, but just to pick one as an example:
The block-size of the container expressed as a value.
Which block-size is that? From the text above, I'd assume that it's the one CSS usually uses, as specified by box-sizing. However, https://drafts.csswg.org/css-conditional-5/#block-size says:
The block-size container feature queries the size of the query container’s content box in the query container’s block axis.
What did you expect to see?
A clear description of which of the container's boxes is used for the size queries.
Do you have any supporting links, references, or citations?
No response
Do you have anything more you want to share?
No response
MDN metadata
Page report details
- Folder:
en-us/web/css/@container - MDN URL: https://developer.mozilla.org/en-US/docs/Web/CSS/@container
- GitHub URL: https://github.com/mdn/content/blob/main/files/en-us/web/css/@container/index.md
- Last commit: 63cbf20
- Document last modified: 2025-07-01T15:43:47.000Z