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[css-backgrounds-3][css-backgrounds-4] Defined serialization of 'background-size' #13053

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[css-backgrounds-3][css-backgrounds-4] Defined serialization of 'background-size' #13053

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9 changes: 9 additions & 0 deletions css-backgrounds-3/Overview.bs
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Original file line number Diff line number Diff line change
Expand Up @@ -1565,6 +1565,13 @@ Positioning Area: the 'background-origin' property</h3>
with other comma-separated background properties
to form each [=background image layer=].

<h4 id="bg-size-serialization">
Serialization of 'background-size' values</h4>

The [=specified value=] and [=computed value=] of the <<bg-size>> type
always serialize as two values, even when the second value is ''background-size/auto'',
due to the [[cssom#serializing-css-values|shortest, most backwards-compatible serialization principle]].

<h3 id="background" oldids="the-background">
Backgrounds Shorthand: the 'background' property</h3>

Expand Down Expand Up @@ -3689,6 +3696,8 @@ Changes since the 14 February 2023 Candidate Recommendation Snapshot</h3>
(<a href="https://github.com/w3c/csswg-drafts/issues/9286">Issue 9286</a>)
<li>Fixed syntax of 'box-shadow' to avoid allowing negative blur radii,
aligning it with the prose.
<li>Defined serialization of 'background-size' in [[#bg-size-serialization]].
(<a href="https://github.com/w3c/csswg-drafts/issues/7802">Issue 7802</a>)
</ul>


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7 changes: 7 additions & 0 deletions css-backgrounds-4/Overview.bs
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Expand Up @@ -1634,6 +1634,13 @@ Sizing Images: the 'background-size' property</h3>
with other comma-separated background properties
to form each [=background image layer=].

<h4 id="bg-size-serialization">
Serialization of 'background-size' values</h4>

The [=specified value=] and [=computed value=] of the <<bg-size>> type
always serialize as two values, even when the second value is ''background-size/auto'',
due to the [[cssom#serializing-css-values|shortest, most backwards-compatible serialization principle]].

<h3 id='background-layers'>
Background Image Layers: the 'background-tbd' shorthand property</h3>

Expand Down