[css-contain-3][editotrial] Update changelog and examples

Author: mirisuzanne

css-contain-3/Overview.bs

@@ -948,14 +948,15 @@ Container Relative Lengths: the ''cqw'', ''cqh'', ''cqi'', ''cqb'', ''cqmin'', '
 	<div class=example>
 		Authors can ensure that [=container query length=] units
 		have an appropriate [=query container=]
-		by applying them inside a [=container query=] with the required <<container-type>>.
+		by applying them inside a [=container query=]
+		that relies on the same ''container-type''.
 		Custom fallback values can be defined outside the [=container query=]:
 
 		<pre class=lang-css>
 		/* The fallback value does not rely on containment */
 		h2 { font-size: 1.2em; }
 
-		@container type(inline-size) {
+		@container (inline-size >= 0px) {
 		  /* only applies when an inline-size container is available */
 		  h2 { font-size: calc(1.2em + 1cqi); }
 		}
@@ -987,10 +988,31 @@ Privacy and Security Considerations {#priv-sec}
 
 This appendix is <em>informative</em>.
 
+<h3 id="changes-2021-12">
+Changes since the 21 December 2021 First Public Working Draft</h3>
+
+	Significant changes since the <a href="https://www.w3.org/TR/2021/WD-css-contain-3-20211221/">21 December 2021 First Public Working Draft</a> include:
+
+	* Allow <<general-enclosed>> syntax in <<container-condition>>s,
+		for the sake of forward compatability.
+		(<a href="https://github.com/w3c/csswg-drafts/issues/6396">Issue 6396</a>)
+	* Remove the size function syntax from <<size-feature>> queries.
+		(<a href="https://github.com/w3c/csswg-drafts/issues/6870">Issue 6870</a>)
+	* Update the [=query container=] selection process
+		to account for necessary container-types,
+		and removed the explicit type-selection syntax.
+		(<a href="https://github.com/w3c/csswg-drafts/issues/6644">Issue 6644</a>)
+	* Remove state query features, which have been deferred.
+		(<a href="https://github.com/w3c/csswg-drafts/issues/6402">Issue 6402</a>)
+	* Clarify container selection around pseudo-elements and the shadow-DOM.
+		(<a href="https://github.com/w3c/csswg-drafts/issues/5984">Issue 5984</a>
+		and <a href="https://github.com/w3c/csswg-drafts/issues/6711">Issue 6711</a>)
+
 <h3 id="l3-changes">
 Changes from <a href="https://www.w3.org/TR/css-contain-2/">CSS Containment Level 2</a>
 </h3>
 
+	* Introduces [=inline-size containment=].
 	* Defines the terms, properties, units, and at-rule
 		needed for [=Container Queries=]