User internalKey instead of jQuery.expando. Fixes #10675

src/data.js

@@ -46,7 +46,7 @@ jQuery.extend({
 
 			// Only defining an ID for JS objects if its cache already exists allows
 			// the code to shortcut on the same path as a DOM node with no cache
-			id = isNode ? elem[ jQuery.expando ] : elem[ jQuery.expando ] && jQuery.expando,
+			id = isNode ? elem[ internalKey ] : elem[ internalKey ] && internalKey,
 			isEvents = name === "events";
 
 		// Avoid doing any more work than we need to when trying to get data on an
@@ -59,9 +59,9 @@ jQuery.extend({
 			// Only DOM nodes need a new unique ID for each element since their data
 			// ends up in the global cache
 			if ( isNode ) {
-				elem[ jQuery.expando ] = id = ++jQuery.uuid;
+				elem[ internalKey ] = id = ++jQuery.uuid;
 			} else {
-				id = jQuery.expando;
+				id = internalKey;
 			}
 		}
 
@@ -144,7 +144,7 @@ jQuery.extend({
 			cache = isNode ? jQuery.cache : elem,
 
 			// See jQuery.data for more information
-			id = isNode ? elem[ jQuery.expando ] : jQuery.expando;
+			id = isNode ? elem[ internalKey ] : internalKey;
 
 		// If there is already no cache entry for this object, there is no
 		// purpose in continuing
@@ -214,11 +214,11 @@ jQuery.extend({
 			// nor does it have a removeAttribute function on Document nodes;
 			// we must handle all of these cases
 			if ( jQuery.support.deleteExpando ) {
-				delete elem[ jQuery.expando ];
+				delete elem[ internalKey ];
 			} else if ( elem.removeAttribute ) {
-				elem.removeAttribute( jQuery.expando );
+				elem.removeAttribute( internalKey );
 			} else {
-				elem[ jQuery.expando ] = null;
+				elem[ internalKey ] = null;
 			}
 		}
 	},