1930583 - Implement justify-items for block containers

Status: RESOLVED DUPLICATE of bug 1930584

(Core :: Layout: Block and Inline, enhancement)

Description

[Sebastian Zartner [:sebo]]

CSS Box Alignment defines justify-items to apply to blocks: https://drafts.csswg.org/css-align/#overview
This bug is meant to implement this.

Sebastian

Comment 1

[Daniel Holbert [:dholbert]]

I think we should just dupe this to bug 1930584; this bug and that bug are two sides of the same coin. Having them separate will likely just add confusion and will inadvertently prevent us from correctly assessing the cumulative webcompat impact of the feature (due to downstream site-reports hanging off of one bug or the other).

We already parse justify-items correctly; and the only missing thing here is to make justify-self: auto make use of it in block boxes (i.e. make children-of-a-block honor justify-self -- and in particular have justify-self:auto make use of whatever justify-items value is specified on the parent). And that is part of bug 1930584. There's no additional work here outside of that.

--> Duping and moving dependencies.