Re: [csswg-drafts] [css-ui] Unprefix 'appearance' and/or make the spec web-compatible

@frivoal asked at tpac what the computed style should be for an element that has a non-author-exposed value in the UA style sheet.

I think we should not end up in such a situation. All values on elements in the UA style sheets should be supported.

Chromium and Gecko support more values than it uses in the UA stylesheet, that they don't need to support for web compat but may need to support internally. For example, Gecko has some values for XUL. They have now [unshipped these values](https://bugzilla.mozilla.org/show_bug.cgi?id=1496720).

Some browsers also have pseudo-elements on form controls. I think we should either standardize such  pseudo-elements, or make them also not author-exposed. In any case, per CSSOM you can't ask for computed style on pseudo-elements other than ::before and ::after.

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Received on Monday, 29 October 2018 13:57:29 UTC