What attribute wins when we have both display and displaystyle on math

[rwlbuis]

What attribute wins when we have both display and displaystyle on math? Both will map internally to math-style.

[rwlbuis]

In firefox displaystyle seems to win.

[fred-wang]

I think displaystyle should win because display specify both centering/block + math-style while displaystyle allows to refine the math-style.

Currently, the spec says the math-style for math@display is implemented in the UA sheet: https://mathml-refresh.github.io/mathml-core/#user-agent-stylesheet while displaystyle is mapped to math-style (in the code). So I guess the latter is stronger than the former.

[fred-wang]

I think there are some tests mixing display and displaystyle.

[fred-wang]

@rwlbuis This is tested by https://w3c-test.org/mathml/relations/css-styling/displaystyle-1.html (and even https://w3c-test.org/mathml/relations/css-styling/displaystyle-015.html)

Closing since this is a particular case of issue #215 :

displaystyle attribute is author-level zero-specificity
display attribute is implemented with UA sheet rules

so displaystyle wins over display.