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[css-contain-3] Tweak the spec for style() queries #8127 #8756

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May 3, 2023
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[css-contain-3] Tweak the spec for style() queries #8127 #8756

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[css-contain-3] Tweak the spec for style() queries #8127
lilles Apr 24, 2023
8a1adea
Reformulate and add general-enclosed evaluation
lilles May 3, 2023
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Reformulate and add general-enclosed evaluation
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@lilles
lilles committed May 3, 2023
commit 8a1adeaa2617c69ae28ceea3623de09696e941a0
21 changes: 10 additions & 11 deletions css-contain-3/Overview.bs
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Expand Up @@ -621,7 +621,8 @@ Container Queries: the ''@container'' rule</h3>
each [=container feature=] in the <<container-query>>
is evaluated against that [=query container=].
If no ancestor is an eligible [=query container=],
then the [=container query=] is ''unknown'' for that element.
then the [=container query=] is ''unknown'' for that element. As for media queries,
<<general-enclosed>> evaluates to ''unknown''.

<div class=example>
As with [=media queries=],
Expand Down Expand Up @@ -902,17 +903,15 @@ Style Container Features</h3>
It is a boolean combination of
individual <dfn>style features</dfn> (<<style-feature>>)
that each query a single, specific property of the [=query container=].
The syntax of a <dfn><<style-feature>></dfn> is the same as for a valid [=declaration=]
[[!CSS-SYNTAX-3]],
and its query is true if
the [=computed value=] of the given property on the [=query container=]
matches the given value
(which is also [=computed value|computed=] with respect to the [=query container=]),
and false otherwise.
The syntax of a <dfn><<style-feature>></dfn> is either the same as for a valid [=declaration=]
[[!CSS-SYNTAX-3]], a [=supported CSS property=], or a <<custom-property-name>>.

Its query evaluates to true if the [=computed value=] of the given property on the
[=query container=] matches the given value (which is also [=computed value|computed=]
with respect to the [=query container=]), and false otherwise.

A [=style feature=] can also be a supported property name without a value. Such
features evaluate to true if the [=computed value=] is different from the [=initial=]
value for the given [=property=].
A [=style feature=] without a value evaluates to true if the [=computed value=]
is different from the [=initial=] value for the given [=property=].

The boolean syntax and logic combining [=style features=] into a [=container style query|style query=]
is the same as for [=CSS feature queries=].
Expand Down