[css-ui] Should "Properties Disabling Native Appearance" also apply when declared in the User Origin?

[pxlcoder]

From https://drafts.csswg.org/css-ui/#appearance-disabling-properties:

Certain properties, when declared in the Author Origin, will disable the native appearance of certain widgets. Specifically, if all the declarations of the Author Origin pertaining to such a widget are cascaded and a cascaded value exists—​after having rolled back any number revert or revert-layer values—​for any property that disables native appearance for widgets, then that widget is rendered as a devolved widget. The rendering of a devolved widget is identical to that of the widget in its primitive appearance, except when specified otherwise by the host language.

Note the explicit mention of "when declared in the Author Origin".

It seems that this behavior should apply to any origin that is not the User-Agent origin. Was this just an oversight when writing the spec, or is there some intentionality behind "Author Origin"?

[pxlcoder]

cc @zcorpan

[zcorpan]

Animation Origin and Transition Origin are intentionally not included. User Origin is not testable in wpt, and not all browsers support user stylesheets.

See #7215

Per the original text quoted in that issue, User Origin was intended to be the same as UA Origin. However, I don't have a strong opinion about User Origin here.

cc @fantasai @andruud

[andruud]

I think we went with "exactly author" at the time to align with Firefox; I don't remember a very intentional decision for the user origin.

If we can make do without changing the current behavior for the user origin, I'd prefer to just let this rest. (In principle, such a change has compat risk.) I think this auto-disabling behavior is a bit hacky anyway.

[zcorpan]

Yeah. User stylesheet authors can use explicit appearance: none. This behavior is mainly there for web compat.

I'll close this as wontfix. cc @frivoal