[csswg-drafts] [css-nesting-1] Should the parent rule be considered when validating a selector containing `&`? (#9943)

cdoublev has just created a new issue for https://github.com/w3c/csswg-drafts:

== [css-nesting-1] Should the parent rule be considered when validating a selector containing `&`? ==
Follow-up on https://github.com/w3c/csswg-drafts/issues/9940#issuecomment-1941374685. 

Should the nested style rule in `:first-child { ::before& {} }` be valid or invalid? `::before:first-child {}` is [invalid](https://drafts.csswg.org/selectors-4/#pseudo-element-states).

This does not seem specified at the moment.

It may be surprising to get different results between the flat/nested versions. But setting `CSSStyleRule.selectorText` would require considering the selector of each parent/nested style rules.

I am also not sure I understand the reasons why `::before:first-child {}` should be considered invalid, instead of as matching nothing.

Please view or discuss this issue at https://github.com/w3c/csswg-drafts/issues/9943 using your GitHub account


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Received on Tuesday, 13 February 2024 14:34:43 UTC