- From: Guillaume via GitHub <sysbot+gh@w3.org>
- Date: Thu, 04 Apr 2024 04:09:42 +0000
- To: public-css-archive@w3.org
Currently, replacing `<mf-value>` with `var()` in a [container size query](https://drafts.csswg.org/css-contain-3/#container-size-query) is only mentioned in a non-normative example.
And the syntax does not allow it at the moment. It requires a valid CSS numeric type according to the feature value definition.
In [CSS Variables](https://drafts.csswg.org/css-variables-2/#using-variables):
> The value of a custom property can be substituted into the value of another property with the `var()` function.
But [`<mf-name>`](https://drafts.csswg.org/mediaqueries-5/#typedef-mf-name) may be considered a descriptor, at best, not as a property.
Is `@container (var(--property) > 1px) {}` valid? Should `var()`-substitution be restricted to `<mf-value>`? Do you plan to allow other substitution functions, like `env()` or `attr()`?
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Received on Thursday, 4 April 2024 04:09:43 UTC