Hi,
In bug 1398482 I'm unprefixing the grid-gap, grid-row-gap, and
grid-column-gap properties. The old names becomes aliases for
the respective unprefixed property.
I'm also adding support for the 'normal' keyword to these properties
and making it the initial value, per spec [1].
I'm also adding support for percentages to the existing unprefixed
column-gap property (which is only supported in multi-column layout
until now) in bug 1398537. It already supports 'normal', so with
these changes it has the same syntax as the updated grid-column-gap
property so we can now "merge" them.
These properties also applies to Flexbox:
https://drafts.csswg.org/css-align-3/#gap-flex
We haven't implemented layout for that yet[2], so one could argue
that we shouldn't unprefix the grid-* properties until we do.
I think we should anyway, for two reasons:
1. Chrome decided to ship them[3] without Flexbox layout support,
so it will likely lead to Grid web-compat issues soon unless we
do the same
2. column-gap is already in the wild, so the problem already exists
for this property with the spec generalizing it to Grid/Flexbox
/Mats
[1]
https://drafts.csswg.org/css-align-3/#column-row-gap
[2]
https://bugzilla.mozilla.org/show_bug.cgi?id=1398483
[3]
https://groups.google.com/a/chromium.org/forum/#!msg/blink-dev/UViBfJuuIq8/w7_2W7lLAgAJ
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