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[css-conditional-5] Make <container-query> optional #9192 #11172

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Nov 11, 2024
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[css-conditional-5] Make <container-query> optional #9192 #11172

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15 changes: 12 additions & 3 deletions css-conditional-5/Overview.bs
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Original file line number Diff line number Diff line change
Expand Up @@ -622,6 +622,14 @@ Naming Query Containers: the 'container-name' property</h3>
.card { margin-inline: 2em; }
}
</pre>

It is also possible to query for a container only based on its name.

<pre class=lang-css>
@container my-page-layout {
.card { padding: 1em; }
}
</pre>
</div>


Expand Down Expand Up @@ -923,7 +931,7 @@ Container Queries: the ''@container'' rule</h3>
where:

<pre class="prod def">
<dfn><<container-condition>></dfn> = [ <<container-name>> ]? <<container-query>>
<dfn><<container-condition>></dfn> = [ <<container-name>>? <<container-query>>? ]!
<dfn><<container-name>></dfn> = <<custom-ident>>
<dfn><<container-query>></dfn> = not <<query-in-parens>>
| <<query-in-parens>> [ [ and <<query-in-parens>> ]* | [ or <<query-in-parens>> ]* ]
Expand Down Expand Up @@ -959,8 +967,7 @@ Container Queries: the ''@container'' rule</h3>
in the <<container-query>>. If the <<container-query>> contains
unknown or unsupported [=container feature=]s,
no [=query container=] will be selected for that <<container-condition>>.
The optional <<container-name>>
filters the set of [=query containers=] considered
The <<container-name>> filters the set of [=query containers=] considered
to just those with a matching [=query container name=].

Once an eligible [=query container=] has been selected for an element,
Expand All @@ -969,6 +976,8 @@ Container Queries: the ''@container'' rule</h3>
If no ancestor is an eligible [=query container=],
then the [=container query=] is ''unknown'' for that element.
As with media queries, <<general-enclosed>> evaluates to ''unknown''.
If the <<container-query>> is omitted, the [=query container=] is eligible as
long as the <<container-name>> matches.

If a [=container query=] includes multiple <<container-condition>>s,
each condition will select it's own [=query container=],
Expand Down