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[csswg-drafts] [css-grid] making percentage grid-gaps zero for the purpose of intrinsic sizing doesn't make sense

From: Mats Palmgren via GitHub <sysbot+gh@w3.org>
Date: Tue, 13 Sep 2016 20:34:20 +0000
To: public-css-archive@w3.org
Message-ID: <issues.opened-176742361-1473798859-sysbot+gh@w3.org>
MatsPalmgren has just created a new issue for 
https://github.com/w3c/csswg-drafts:

== [css-grid] making percentage grid-gaps zero for the purpose of 
intrinsic sizing doesn't make sense ==
It was resolved in issue 345 that percentage grid-gaps are zero
for the purpose of intrinsic sizing:
https://github.com/w3c/csswg-drafts/issues/345

I think this needs to be revisited.  It's counterintuitive that
percentage grid-gaps are zero while percentages in other properties
actually influence the intrinsic sizing.  Making them zero doesn't
respect the author's intent.

It also contradicts how intrinsic sizing works in general:
https://github.com/w3c/csswg-drafts/issues/347

I think instead we should take either of these alternative options:

A.  specify percentage grid-gap in some reasonable way for
    the purpose of intrinsic sizing that harmonize with how
    we want intrinsic sizing to work in general (issue 347)

B.  move percentage grid-gaps to the next level of the CSS Grid spec

To help make a decision on this I have prototyped A in Gecko and
from what I can tell, it seems fairly easy to implement and spec
something that would work well.  Here's an example:
https://people.mozilla.org/~mpalmgren/tests/grid/percent-intrinsic-sizing.html
(last two boxes are grids) and here's how it renders:
https://people.mozilla.org/~mpalmgren/tests/grid/percent-intrinsic-sizing.png

Thanks,
Mats


Please view or discuss this issue at 
https://github.com/w3c/csswg-drafts/issues/472 using your GitHub 
account
Received on Tuesday, 13 September 2016 20:34:28 UTC

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