[css-grid-3][masonry] Initial value of item-tolerance is normal (like gaps) #12111

Author: fantasai

css-grid-3/Overview.bs

@@ -757,8 +757,8 @@ Placement Precision: the 'item-tolerance' property</h3>
 
 	<pre class=propdef>
 	Name: item-tolerance
-	Value: <<length-percentage>> | infinite
-	Initial: 1em
+	Value: normal | <<length-percentage>> | infinite
+	Initial: normal
 	Percentages: relative to the [=grid-axis=] [=content box=] size of the [=masonry container=]
 	Inherited: no
 	Applies to: [=masonry containers=]
@@ -790,6 +790,15 @@ Placement Precision: the 'item-tolerance' property</h3>
 			Note: The initial value is a “small” distance (''1em'')
 			that is probably appropriate to represent “close enough”.
 
+		: <dfn>normal</dfn>
+		:: Resolves to a value of ''1em''.
+			<!-- This default is consistent with gaps. -->
+			ISSUE(12111): Should this be a [=used value=] or [=computed value=] of ''1em''?
+			Used values would allow easier responsiveness to different layout modes,
+			and would be more consistent with 'gap',
+			but computed values would enable interpolation with <<length-percentage>> values
+			and are simpler to manage otherwise.
+
 		: <dfn>infinite</dfn>
 		:: Specifies an infinite [=tie threshold=].
 			This makes items distribute themselves strictly in order,
@@ -1482,7 +1491,10 @@ Recent Changes</h3>
 	* Introduced 'item-flow' and the 'item-*' longhands,
 		replacing <css>masonry-flow</css> and related properties.
 		(<a href="https://github.com/w3c/csswg-drafts/issues/11480">Issue 11480</a>)
-	* Renamed <css>masonry-slack</css> to 'item-tolerance'.
+	* Renamed <css>masonry-slack</css> to 'item-tolerance'
+		and gave it an initial value of ''item-tolerance/normal''.
+		(<a href="https://github.com/w3c/csswg-drafts/issues/10884">Issue 10884</a>,
+		 <a href="https://github.com/w3c/csswg-drafts/issues/12111">Issue 12111</a>)
 	* Tweak baseline alignment to export the highest/lowest among the first/last items of every track.
 		(<a href="https://github.com/w3c/csswg-drafts/issues/9530">Issue 9530</a>)