Supports interoperable removal of hyphenated/camelCase properties. Fixes #9413

src/data.js

@@ -135,7 +135,12 @@ jQuery.extend({
 			return;
 		}
 
-		var internalKey = jQuery.expando, isNode = elem.nodeType,
+		var thisCache,
+
+			// Reference to internal data cache key
+			internalKey = jQuery.expando,
+
+			isNode = elem.nodeType,
 
 			// See jQuery.data for more information
 			cache = isNode ? jQuery.cache : elem,
@@ -150,9 +155,16 @@ jQuery.extend({
 		}
 
 		if ( name ) {
-			var thisCache = pvt ? cache[ id ][ internalKey ] : cache[ id ];
+
+			thisCache = pvt ? cache[ id ][ internalKey ] : cache[ id ];
 
 			if ( thisCache ) {
+
+				// Support interoperable removal of hyphenated or camelcased keys
+				if ( !thisCache[ name ] ) {
+					name = jQuery.camelCase( name );
+				}
+
 				delete thisCache[ name ];
 
 				// If there is no data left in the cache, we want to continue