[selectors-4] Drop the :drop() pseudo-class, since HTML dropped its declarative support for drop zones. #2257

Author: fantasai

selectors-4/Overview.bs

@@ -2338,57 +2338,6 @@ The Focus Container Pseudo-class: '':focus-within''
 	(including non-element nodes, such as text nodes)
 	matches the conditions for matching '':focus''.
 
-
-The Drop Target Pseudo-class: '':drop'' and '':drop()''
-
-	The :drop pseudo-class applies to all elements
-	that are drop targets,
-	as defined by the document language,
-	while the user is “dragging”
-	or otherwise conceptually carrying an item
-	to be “dropped”.
-
-	The :drop() functional pseudo-class is identical to '':drop'',
-	but allows additional filters to be specified that can exclude some drop targets.
-	Its syntax is:
-
-	:drop( [ active || valid || invalid ]? ) 
-
-	The keywords have the following meanings:
-
-	
-		active
-		
-			The drop target is the current drop target for the drag operation.
-			That is, if the user were to release the drag,
-			it would be dropped onto this drop target.
-
-		valid
-		
-			If the document language has a concept of “valid” and “invalid” drop targets,
-			this only matches if the drop target is valid for the object currently being dragged.
-			Otherwise, it matches all drop targets.
-
-			For example, HTML's dropzone attribute can specify that the drop target only accepts strings or files that are set to a given type.
-
-		invalid
-		
-			If the document language has a concept of “valid” and “invalid” drop targets,
-			this only matches if the drop target is invalid for the object currently being dragged.
-			Otherwise, it matches nothing.
-	
-
-	Multiple keywords can be combined in the argument,
-	representing only drop targets that satisfy all of the keywords.
-	For example, '':drop(valid active)'' will match the active drop target if it's valid,
-	but not if it's invalid.
-
-	If no keywords are given in the argument,
-	'':drop()'' has the same meaning as '':drop''--
-	it matches every drop target.
-
-	Issue: Turn this scenario into an example.
-
 
 Time-dimensional Pseudo-classes
 
@@ -3926,6 +3875,8 @@ Changes
 		Changed the specificity of '':is()'', '':where()'', and '':nth-child()''
 		to not depend on which selector argument matched.
 		(Issue 1027)
+		Dropped the '':drop()'' pseudo-classes since HTML dropped the related feature.
+		(Issue 2257)
 	
 
 	Significant changes since the 2 May 2013 Working Draft include: