[css-fonts] Spec Not Update to Include Feature Now Implemented

[jpmedley]

The FontFace.display property has been implemented in Chrome 57. It's rumored to be implemented in other browsers as well. Per MDN instructions the MDN page describing it must contain a link to the spec.

Unfortunately, I can find no spec containing this property, though I'm told by reliable sources that it is supposed to be.

https://drafts.csswg.org/css-fonts-4/

[svgeesus]

Related:
#1360
tabatkins/specs#54

Is this a property or a descriptor? Isn't the descriptor in https://drafts.csswg.org/css-fonts-4/#font-display-desc ?

From my reading of #1360 I think the corresponding interface would be added to https://drafts.csswg.org/css-fonts-4/#om-fontface but has not yet been added.

[litherum]

This is a dup of #1360