[css-overflow-3][css-overflow-4] Shift 'overflow' on replaced elements to L4 while details are being worked out. #7144

Author: fantasai

css-overflow-3/Overview.bs

@@ -481,25 +481,6 @@ Scrolling and Clipping Overflow: the 'overflow-x', 'overflow-y', and 'overflow'
 	Choosing the appropriate behavior for each scrolling mechanism
 	is the responsibility of the UA.
 
-	ISSUE(7144): Applicability of 'overflow' to [=replaced elements=]
-	is still being worked out.
-
-	On [=replaced elements=],
-	the [=used values=]
-	of all computed values other than ''visible''
-	is ''overflow/clip''.
-	Host languages should define [=UA style sheet=] rules
-	that apply a default value of ''overflow/clip'' to such elements
-	and set their 'overflow-clip-margin' to ''overflow-clip-margin/content-box''.
-
-	Note: Application of 'overflow' to [=replaced elements=] was added
-	to allow images to paint effects outside their effective layout box;
-	the recommended UA style sheet rules are to effect their original behavior as a default.
-	See discussion in <a href="https://github.com/w3c/csswg-drafts/issues/7058">Issue 7059</a>
-	and <a href="https://github.com/w3c/csswg-drafts/issues/7144">Issue 7144</a>.
-	This is a change from <a href="https://www.w3.org/TR/CSS2/">CSS2.1</a>
-	and is at-risk.
-
 <h3 id="static-media">
 Overflow in Print and Other Static Media</h3>
 
@@ -630,7 +611,7 @@ Expanding Clipping Bounds: the 'overflow-clip-margin' property</h3>
 	Value: <<visual-box>> || <<length [0,∞]>>
 	Initial: ''0px''
 	Inherited: no
-	Applies to: all elements
+	Applies to: boxes to which 'overflow' applies
 	Computed value: the computed <<length>> and a <<visual-box>> keyword
 	Animation type: per computed value if the <<visual-box>> values match; otherwise discrete
 	</pre>
@@ -651,8 +632,7 @@ Expanding Clipping Bounds: the 'overflow-clip-margin' property</h3>
 			i.e. when the specified offset is zero.
 
 			If omitted,
-			defaults to ''overflow-clip-margin/padding-box'' on non-[=replaced=] elements,
-			or ''overflow-clip/content-box'' on [=replaced=] elements.
+			defaults to ''overflow-clip-margin/padding-box''.
 
 		: <dfn><<length [0,∞]>></dfn>
 		::

css-overflow-4/Overview.bs

@@ -184,6 +184,32 @@ Scrolling and Clipping Overflow</h2>
 
 	Issue: Copy [[css-overflow-3#overflow-properties|Level 3 content]] when final.
 
+<h3 id="overflow-control">
+Managing Overflow: the 'overflow-x', 'overflow-y', and 'overflow' properties</h3>
+
+	This level extends the 'overflow-x' and 'overflow-y' properties
+	(and 'overflow' [=shorthand=])
+	to apply to [=replaced elements=].
+
+	On [=replaced elements=],
+	the [=used values=]
+	of all computed values other than ''visible''
+	is ''overflow/clip''.
+	Host languages should define [=UA style sheet=] rules
+	that apply a default value of ''overflow/clip'' to such elements
+	and set their 'overflow-clip-margin' to ''overflow-clip-margin/content-box''.
+
+	Note: Application of 'overflow' to [=replaced elements=] was added
+	to allow images to paint effects outside their effective layout box;
+	the recommended UA style sheet rules are to effect their original behavior as a default.
+	See discussion in <a href="https://github.com/w3c/csswg-drafts/issues/7058">Issue 7059</a>
+	and <a href="https://github.com/w3c/csswg-drafts/issues/7144">Issue 7144</a>.
+	This is a change from <a href="https://www.w3.org/TR/CSS2/">CSS2.1</a>
+	and is at-risk.
+
+	ISSUE(7144): Application of 'overflow' to [=replaced elements=]
+	is still being worked out.
+
 <h3 id="overflow-clip-margin">
 Expanding Clipping Bounds: the 'overflow-clip-margin-*' properties</h3>
 
@@ -1823,8 +1849,13 @@ Recent Changes</h3>
 	<ul>
 		<li>Moved in the definition of 'text-overflow' from [[CSS-UI-4]].
 		<li>Moved the core definition of 'scrollbar-gutter' to [[CSS-OVERFLOW-3]]
-				(it will be copied back here once this specification is undiffed)
-				and shift exploratory 'scrollbar-gutter' extension ideas into an appendix.
+			(it will be copied back here once this specification is undiffed)
+			and shift exploratory 'scrollbar-gutter' extension ideas into an appendix.
+		<li>Defined extension of 'overflow' and 'overflow-clip-margin' to apply to [=replaced elements=].
+			How exactly this works is still <a href="https://github.com/w3c/csswg-drafts/issues/7144">still under discussion</a>.
+			(<a href="https://github.com/w3c/csswg-drafts/issues/7144">Issue 7144</a>)
+		<li>Defined [=longhands=] for 'overflow-clip-margin'.
+			(<a href="https://github.com/w3c/csswg-drafts/issues/7245">Issue 7245</a>)
 	</ul>
 
 <h3 id="changes-l3">