[cssom] Add resolved value special case for background-image and similar?

[andruud]

As far as I can tell, the resolved value of background-image is defined by specs as the computed value. This means that e.g. currentcolor within gradients should not be resolved in the return value of getComputedStyle(e).backgroundImage, yet all browsers appear to do this anyway.

Should we change cssom and say that the resolved value for background-image is the used value? (May also be relevant for other properties, e.g. border-image). Or do we try to fix implementations instead? @emilio

[emilio]

It's unclear we want the "used" value, what does that imply for the length of the lists etc? It's just "computed with colors resolved", right?

[andruud]

Yeah, I wasn't sure either. Do you think we should spec resolved="computed with colors resolved", then?

[emilio]

I think that's fine, yeah I think we don't expose currentColor in the computed style anywhere.