[css3-background] Animatable: yes except keyword values

When css3-background says this for, say, background-size [1], what does it mean? Does it mean a keyword value at either end prevents any animation? Or does it mean animations from a keyword to any other keyword produces no animation?

[1] http://dev.w3.org/csswg/css3-background/#the-background-size

Received on Thursday, 7 June 2012 23:07:33 UTC