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[css-mixins-1] Let 'inherit' work like 'inherit()' #12387

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Jun 23, 2025
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[css-mixins-1] Let 'inherit' work like 'inherit()' #12387

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25 changes: 23 additions & 2 deletions css-mixins-1/Overview.bs
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Original file line number Diff line number Diff line change
Expand Up @@ -633,8 +633,29 @@ with its [=function parameters=] overriding "inherited" custom properties of the
is the [=guaranteed-invalid value=].

* On custom properties,
the [=CSS-wide keywords=] ''initial'' and ''inherit'' have their usual effect;
all other [=CSS-wide keywords=] resolve to the [=guaranteed-invalid value=].
the [=CSS-wide keywords=] have the following effects:

<dl>
<dt>''initial''</dt>
<dd>
Resolves to the initial value of the custom property
within |registrations|.
</dd>

<dt>''inherit''</dt>
<dd>
Resolves like an ''inherit()'' function
with the custom property name as its one and only argument.

Note: This ensures that a [=function parameter=] defaulted to ''inherit''
is reinterpreted using the local [=parameter type=].
</dd>

<dt>any other [=CSS-wide keyword=]</dt>
<dd>
Resolves to the [=guaranteed-invalid value=].
</dd>
</dl>

Note: ''initial'' references the [=custom property registration=]
created from the [=function parameters=],
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