[css-contain-3] Draft CSSOM CSSContainerRule API w3c#7033

Author: mirisuzanne

css-contain-3/Overview.bs

@@ -974,6 +974,40 @@ Container Relative Lengths: the ''cqw'', ''cqh'', ''cqi'', ''cqb'', ''cqmin'', '
 	</div>
 
 
+<h2 id="apis">APIs</h2>
+
+
+<h3 id="the-csscontainerrule-interface">
+The <code>CSSContainerRule</code> interface</h3>
+
+	The {{CSSContainerRule}} interface represents a ''@container'' rule.
+
+	<pre class='idl'>
+	[Exposed=Window]
+	interface CSSContainerRule : CSSConditionRule {
+	};
+	</pre>
+
+	<dl class='idl-attributes'>
+		<dt><code>conditionText</code> of type <code>CSSOMString</code> (CSSContainerRule-specific definition for attribute on CSSConditionRule)
+		<dd>The <code>conditionText</code> attribute (defined on the <code>CSSConditionRule</code> parent rule),
+			on getting, must return the condition that was specified,
+			without any logical simplifications,
+			so that the returned condition will evaluate to the same result
+			as the specified condition
+			in any conformant implementation of this specification
+			(including implementations that implement future extensions
+			allowed by the <<general-enclosed>> extensibility mechanism in this specification).
+			In other words,
+			token stream simplifications are allowed
+			(such as reducing whitespace to a single space
+			or omitting it in cases where it is known to be optional),
+			but logical simplifications (such as removal of unneeded parentheses,
+			or simplification based on evaluating results) are not allowed.
+	</dl>
+
+	Issue(7033): Add CSSOM API for CSSContainerRule
+
 Suppressing An Element’s Contents Entirely: the 'content-visibility' property {#content-visibility}
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