[css-sizing] The resolved value of min-size: auto should also be 0 when there is no box

[Loirooriol]

From https://drafts.csswg.org/css-sizing/#valdef-width-auto, about min-width/height: auto,

For backwards-compatibility, the resolved value of this keyword is zero for boxes of all [CSS2] display types: block and inline boxes, inline blocks, and all the table layout boxes.

Both Firefox and Chromium also seem to resolve it to 0 for display: none/contents. I guess display: none needs it for backwards-compatibility, and display: contents should be consistent with none. So the spec should include these cases.

[fantasai]

Agenda+ to request confirmation.

[fantasai]

Proposed text: “It also resolves to zero when no box is generated.” This covers 'display: none', descendants of 'display: none', and 'display: contents'.

[css-meeting-bot]

The CSS Working Group just discussed The resolved value of min-size: auto should also be 0 when there is no box, and agreed to the following:

• RESOLVED: The resolved value of min-size: auto is 0 when there is no box

The full IRC log of that discussion

<AmeliaBR> Topic: The resolved value of min-size: auto should also be 0 when there is no box
<AmeliaBR> github: https://github.com//issues/3557
<AmeliaBR> fantasai: Pretty straightforward. Wanted to cover elements with display: none, their children, and also elements with display: contents
<AmeliaBR> Rossen_: Resolving to 0 makes the most sense. Any disagreements?
<AmeliaBR> RESOLVED: The resolved value of min-size: auto is 0 when there is no box