- var oldData = jQuery.data( orig[nodeIndex] ),
- curData = jQuery.data( this, oldData ),
- events = oldData && oldData.events;
-
- if ( events ) {
- delete curData.handle;
- curData.events = {};
-
- for ( var type in events ) {
- for ( var i = 0, l = events[ type ].length; i < l; i++ ) {
- jQuery.event.add( this, type, events[ type ][ i ], events[ type ][ i ].data );
+ var internalKey = jQuery.expando,
+ oldData = jQuery.data( orig[nodeIndex] ),
+ curData = jQuery.data( this, oldData );
+
+ // Switch to use the internal data object, if it exists, for the next
+ // stage of data copying
+ if ( (oldData = oldData[ internalKey ]) ) {
+ var events = oldData.events;
+ curData = curData[ internalKey ] = jQuery.extend({}, oldData);
+
+ if ( events ) {
+ delete curData.handle;
+ curData.events = {};
+
+ for ( var type in events ) {
+ for ( var i = 0, l = events[ type ].length; i < l; i++ ) {
+ jQuery.event.add( this, type, events[ type ][ i ], events[ type ][ i ].data );
+ }