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[css-animations-1] Make @keyframes name disallow empty <string> #13151

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[css-animations-1] Make @keyframes name disallow empty <string> #13151

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The @keyframs-name style rule should not allow empty <string>.
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@javifernandez
javifernandez committed Nov 25, 2025
commit c15c453fcb6129bed25eea25e9a173e871f667e0
2 changes: 2 additions & 0 deletions css-animations-1/Overview.bs
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Expand Up @@ -228,6 +228,8 @@ Declaring Keyframes</h2>
the names are fully <a>case-sensitive</a>;
two names are equal only if they are codepoint-by-codepoint equal.
The <<custom-ident>> additionally excludes the ''animation-name/none'' keyword.
The empty <<string>> should be parsed as invalid, any other should be serialized as <<ident>>
when possible, or as <<string>> otherwise (eg, <a>CSS Wide Keywords<a>).

<div class=example>
For example, the following two ''@keyframes'' rules have the same name,
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