[css-align] are there compatibility issues with replacing overconstraint rules from CSS2? #1428
Description
The rules for justify-self on blocks and the rules for justify-self on Absolutely-Positioned boxes specify that they replace the overconstraint rules in CSS Level 2 with the rules for justify-self. This replacement is not scoped to values other than normal. I think that is probably a good thing.
However, one issue where the overconstraint rules have come up is the question of what getComputedStyle() returns for the used values of margin (for block) or offset (for abspos) properties. My memory is that this generally hasn't been particularly conformant to a literal reading of the spec, but this may have changed.
I think it's worth investigating what implementations do for getComputedStyle() and margins, and then either:
- scoping this replacement to non-
normalvalues (which in some sense would introduce inconsistency), or - adding a note that this replacement is intentionally intended to include
normalvalues as well, and therefore that the used values of margins (for blocks) or offsets (for abspos) are no longer expected to be adjusted for overconstraint.