Re: [csswg-drafts] [css-page] Spec seems confused about descriptors and properties (#5969)

[CSS page](https://www.w3.org/TR/css-page-3/#page-properties) states:

> page-margin boxes inherit from the page context. The page context inherits from the root element.

I would absolutely expect this to apply to to custom properties as well as regular properties, and having tested the implementations at https://printcss.live all but one of the implementations that support custom properties also support them in the `@page` rule for <strike>properties</strike> descriptors such as `color`.

I didn't test for `size`, but we don't make any distinction between descriptors and properties at parse time - and from the discussion in https://github.com/w3c/csswg-drafts/issues/820 I think this is typical. So I don't see any reason to prevent them applying to `size`.

For `@page` and the page margin at-rules, the distinction between property and descriptor is not so useful: `color`, `content`, `font-family` etc. all apply in exactly the same way they do in normal layout , so trying to enforce different parsing rules would be a mistake IMHO. I'm not familiar enough with `@keyframe` or `@nest` but if they inherit from `:root` I suspect I'd probably make the same argument for those too.


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Received on Tuesday, 16 August 2022 10:09:01 UTC