[selectors-4] Drop the :drop() pseudo-class, since HTML dropped its d…

…eclarative support for drop zones. #2257

selectors-4/Overview.bs

@@ -2338,57 +2338,6 @@ The Focus Container Pseudo-class: '':focus-within''</h3>
 	(including non-element nodes, such as text nodes)
 	matches the conditions for matching '':focus''.
 
-<h3 id="drag-pseudos">
-The Drop Target Pseudo-class: '':drop'' and '':drop()''</h3>
-
-	The <dfn>:drop</dfn> 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 <dfn id="selectordef-drop-function">:drop()</dfn> functional pseudo-class is identical to '':drop'',
-	but allows additional filters to be specified that can exclude some drop targets.
-	Its syntax is:
-
-	<pre class='prod'>:drop( [ active || valid || invalid ]? ) </pre>
-
-	The keywords have the following meanings:
-
-	<dl dfn-type="value" dfn-for=":drop()">
-		<dt><dfn>active</dfn>
-		<dd>
-			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.
-
-		<dt><dfn>valid</dfn>
-		<dd>
-			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 <code>dropzone</code> attribute can specify that the drop target only accepts strings or files that are set to a given type.
-
-		<dt><dfn>invalid</dfn>
-		<dd>
-			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.
-	</dl>
-
-	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 <em>if</em> 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 <a href="http://forums.mozillazine.org/viewtopic.php?f=18&t=2633249">this scenario</a> into an example.
-
 <h2 id="time-pseudos">
 Time-dimensional Pseudo-classes</h2>
 
@@ -3926,6 +3875,8 @@ Changes</h2>
 		<li>Changed the specificity of '':is()'', '':where()'', and '':nth-child()''
 		to not depend on which selector argument matched.
 		(<a href="https://github.com/w3c/csswg-drafts/issues/1027">Issue 1027</a>)
+		<li>Dropped the '':drop()'' pseudo-classes since HTML dropped the related feature.
+		(<a href="https://github.com/w3c/csswg-drafts/issues/2257">Issue 2257</a>)
 	</ul>
 
 	Significant changes since the <a href="https://www.w3.org/TR/2013/WD-selectors4-20130502/">2 May 2013 Working Draft</a> include: