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[css-values-4] Add revert and revert-layer to CSS-wide keywords. #7763

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[css-values-4] Add revert and revert-layer to CSS-wide keywords. #7763

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22 changes: 17 additions & 5 deletions css-values-4/Overview.bs
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Expand Up @@ -604,16 +604,28 @@ Pre-defined Keywords</h3>
</div>

<h4 id="common-keywords">
CSS-wide keywords: ''initial'', ''inherit'' and ''unset''</h4>
CSS-wide keywords: ''initial'', ''inherit'', ''unset'', ''revert'' and ''revert-layer''</h4>

As defined <a href="#component-types">above</a>,
all properties accept the <dfn export>CSS-wide keywords</dfn>,
which represent value computations common to all CSS properties.

The ''initial'' keyword represents the value specified as the property's initial value.
The ''inherit'' keyword represents the computed value of the property on the element's parent.
The ''unset'' keyword acts as either ''inherit'' or ''initial'',
depending on whether the property is inherited or not.
<ul>
<li>
The ''initial'' keyword represents the value specified as the property's initial value.
</li>
<li>
The ''inherit'' keyword represents the computed value of the property on the element's parent.
</li>
<li>
The ''unset'' keyword acts as either ''inherit'' or ''initial'',
depending on whether the property is inherited or not.
</li>
<li>
The ''revert'' and ''revert-layer'' keywords is defined in [[!css-cascade-5]] <a href="https://www.w3.org/TR/css-cascade-5/#defaulting-keywords">Explicit Defaulting</a>.
</li>
</ul>

All of these keywords are normatively defined in the Cascade module. [[!CSS3CASCADE]]

<wpt>
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