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Revert "[css-animation-1] Handle <string> values in keyframes-name as identitiers" #12996

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Oct 21, 2025
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Revert "[css-animation-1] Handle <string> values in keyframes-name as identitiers" #12996

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8 changes: 2 additions & 6 deletions css-animations-1/Overview.bs
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Original file line number Diff line number Diff line change
Expand Up @@ -229,10 +229,6 @@ 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 <<string>> should be treated as <<custom-ident>>, hence parsed as invalid if
is one of the <a>CSS-wide keywords</a> or "default"; empty string is not allowed
either. It's serialized as identifier when possible and as <<string>> otherwise.


<div class=example>
For example, the following two ''@keyframes'' rules have the same name,
Expand All @@ -258,8 +254,8 @@ Declaring Keyframes</h2>
@keyframes None { /* ... */ }
</pre>

They are also <em>invalid</em> if those names are specified with a <<string>>
because they can not be serialized as valid <<custom-ident>>:
However, those names <em>can</em> be specified with a <<string>>,
so the following are both <em>valid</em>:

<pre class=lang-css>
@keyframes "initial" { /* ... */ }
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