[css-grid-3][Masonry] fit-content track size

[alisonmaher]

In Grid, we don't currently support a fit-content track size, only fit-content(). I couldn't find why in the spec - is this because of the special minmax() definition/restriction in grid? If so, depending on how #12573 gets resolved, should we consider adding support for fit-content, as well as auto repeats that take fit-content?

[Loirooriol]

My guess is:

• A min-content track size uses the min-content contribution of items
• A max-content track size uses the max-content contribution of items
• So to be consistent, a fit-content track size would use the fit-content contribution of items, but there is no such thing.

What is your idea, treating a fit-content track size as min-content when sizing the grid under a min-content constraint, treat it as max-content when sizing under a max-content constraint, and otherwise use the shrink-to-fit formula like clamp(min-content contribution, available grid space, max-content contribution)?

That's the only reasonable thing I can think of, but not sure how useful it would be to use the available grid space when there are multiple tracks. Of course we can't use the grid area size, since that's the thing that is being calculated.

Also note that adding a fit-content track size that relates to the fit-content box size would probably make people think that the fit-content() track size relates to the fit-content() box size, but that's not really the case (probably it wasn't a good idea to use the same name).

[alisonmaher]

Thanks - yeah, I found it surprising that we supported one and not both, but based on your explanation, that makes more sense now. I'll close this issue out since there likely isn't a good use case for adding it