Allow negated prefers-reduced-motion media queries in AMP validator #40454
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Hi @erwinmombay 👋 This PR updates the AMP validator to allow negated All CI checks are passing. Thanks! |
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Summary
Fixes AMP validator incorrectly flagging valid CSS media queries using
not (prefers-reduced-motion: reduce)as malformed.Details
notas a valid media query modifier in the validator specMotivation
This syntax is valid per CSS Media Queries Level 5 and is already used in
AMP documentation (e.g. amp-animation).
Fixes #40384