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[mediaqueries][css-conditional] Allow empty functions in <general-enclosed> · Issue #6803 · w3c/csswg-drafts · GitHub

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[mediaqueries][css-conditional] Allow empty functions in <general-enclosed> #6803

Description

@andruud wrote in #6312 (comment)

The reason Chromium appears to evaluate not fn() to false in the demo is because not fn() is actually invalid grammar. (<any-value>, requires one or more tokens).

Since this is about forwards-compatible parsing and evaluation, it seems to me it would make more sense if <any-value> were optional so that empty functional notations would be syntactically valid.

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