[css-scroll-snap-1] Explicitly define that scroll-snap-type and scroll-padding propagate from root to viewport. w3c#3740

fantasai · fantasai · commit b5afa1086cf3 · 2019-03-18T18:12:37.000-07:00
diff --git a/css-scroll-snap-1/Overview.bs b/css-scroll-snap-1/Overview.bs
@@ -301,6 +301,11 @@ Scroll Snapping Rules: the 'scroll-snap-type' property {#scroll-snap-type}
       </pre>
     </div>
 
+    UAs must apply the 'scroll-snap-type' value set on the root element
+    to the document viewport.
+    Note that, unlike 'overflow',
+    'scroll-snap-type' values are <em>not</em> propagated from HTML <{body}>.
+
 <h4 id="snap-axis">
 Scroll Snap Axis: the ''x'', ''y'', ''scroll-snap-type/block'', ''scroll-snap-type/inline'', and ''both'' values</h4>
 
@@ -507,6 +512,12 @@ Scroll Snapport: the 'scroll-padding' property {#scroll-padding}
         </pre>
     </div>
 
+    UAs must apply the 'scroll-padding' values set on the root element
+    to the document viewport.
+    (Note that, unlike 'overflow',
+    'scroll-padding' values are <em>not</em> propagated from HTML <{body}>.)
+
+
 Aligning Scroll Snap Areas:  Properties on the elements {#properties-on-the-elements}
 =====================================================================================
 
@@ -1140,15 +1151,15 @@ Changes Since 31 January 2019 CR {#changes-20190131}
 			even when scroll snapping is off.
 			(<a href="https://github.com/w3c/csswg-drafts/issues/3721">Issue 3721</a>)
 			<blockquote>
-				<ins><p>Also, to offer better control over paging and scroll positioning
+				<p><ins>Also, to offer better control over paging and scroll positioning
 				even when snapping is off,
 				this module defines the 'scroll-padding' property
 				for use on all <a>scroll containers</a>,
 				to adjust the <a>scroll container</a>’s <a>optimal viewing region</a>
 				for the purpose of paging and scroll-into-view operations;
 				similarly the 'scroll-margin' property can be used on any box
 				to adjust its visual area
-				for the purpose of scroll-into-view operations.</p></ins>
+				for the purpose of scroll-into-view operations.</ins></p>
 			</blockquote>
 			<blockquote>
 				<p>This property specifies
@@ -1167,6 +1178,23 @@ Changes Since 31 January 2019 CR {#changes-20190131}
 				<em>even when snapping is off
 				or not applied on this element</em></ins>.</p>
 			</blockquote>
+		<li id="change-2019-propagation">
+			Defined explicitly that 'scroll-snap-type' and 'scroll-padding' values
+			are propagated from the root element to the document viewport
+			as would be expected.
+			(<a href="https://github.com/w3c/csswg-drafts/issues/3740">Issue 3740</a>)
+			<blockquote>
+				<p><ins>UAs must apply the 'scroll-snap-type' value set on the root element
+				to the document viewport.
+				Note that, unlike 'overflow',
+				'scroll-snap-type' values are <em>not</em> propagated from HTML <{body}>.</ins></p>
+			</blockquote>
+			<blockquote>
+				<p><ins>UAs must apply the 'scroll-padding' values set on the root element
+				to the document viewport.
+				(Note that, unlike 'overflow',
+				'scroll-padding' values are <em>not</em> propagated from HTML <{body}>.)</ins></p>
+			</blockquote>
 	</ul>
 
 	Changes since the <a href="https://www.w3.org/TR/2018/CR-css-scroll-snap-1-20180814/">14 August 2018 Candidate Recommendation</a> include:
