Guillaume

About [comma-containing productions](https://drafts.csswg.org/css-values-5/#comma-containing-productions): > If it does not start with a "{" token, then it cannot contain commas or {} blocks `@media unknown(foo, bar) {}` and `@media unknown({}) {}` are...

[cssom-1] Serialization of feature values

4

[*Serializing Media Feature Values*](https://drafts.csswg.org/cssom-1/#serializing-media-feature-values) is poorly defined. This is not really important but hey, it could simply be replaced with [serializing a CSS component value](https://drafts.csswg.org/cssom-1/#serialize-a-css-component-value): keywords in lowercase, base 10...

[css-values-5] Trailing comma in `attr()`

4

Is a trailing comma allowed in [`attr()`](https://drafts.csswg.org/css-values-5/#attr-notation) like in [`var()`](https://drafts.csswg.org/css-variables-2/#using-variables)? > `attr() = attr( ? , ?)` > `var() = var( , ? )` > > In an exception to...

The [`syntax` descriptor](https://drafts.css-houdini.org/css-properties-values-api-1/#the-syntax-descriptor) could now be defined with a "naked" value matching [``](https://drafts.csswg.org/css-values-5/#css-syntax). When declared as a ``, its value would be [parsed](https://drafts.csswg.org/css-syntax-3/#css-parse-something-according-to-a-css-grammar) against `` instead of calling [consume a...

The [spec](https://drafts.css-houdini.org/css-properties-values-api-1/#initial-value-descriptor) wants `@property` to be invalid when `syntax` is not `*` and `initial-value` is a computationally dependent value. In current version of Chrome and FF, `@property` is valid with...

There is this note about [computationally independent](https://drafts.css-houdini.org/css-properties-values-api-1/#computationally-independent) values: > [...] `3em` is not computationally independent [...]. **Neither is a value with a `var()` function**, because it relies on the value...

This hyperlinks the term "media type" for clarity.

[css-images-4][css-shapes-1] Allow mixing `<radial-extent>` and `<length-percentage>` in `<radial-size>`

1

Two `` keywords can now be specified for [`ellipse()`](https://drafts.csswg.org/css-shapes-1/#funcdef-basic-shape-ellipse) or an elliptical [`radial-gradient()`](https://drafts.csswg.org/css-images-4/#typedef-radial-gradient-syntax), thanks to https://github.com/w3c/csswg-drafts/commit/351600a57424296b9616cb701dd95d4533e4b638. For example, `radial-gradient(farthest-corner closest-side, yellow, magenta)` is now valid. This was proposed in #824...