Ticket #4539: closest-live-context.patch

traversing.js

@@ -34 +34 @@
                         }) ), "filter", selector );
         },
 
-        closest: function( selector ) {
+        closest: function( selector, context ) {
                 var pos = jQuery.expr.match.POS.test( selector ) ? jQuery(selector) : null,
-                        closer = 0;
+                        closer = 0,
+                        stopElement = ( context && context.parentNode ) ? context.parentNode : false;;
 
                 return this.map(function(){
                         var cur = this;
-                        while ( cur && cur.ownerDocument ) {
+                        while ( cur && cur.ownerDocument && stopElement !== cur) {
                                 if ( pos ? pos.index(cur) > -1 : jQuery(cur).is(selector) ) {
                                         jQuery.data(cur, "closest", closer);
                                         return cur;