Added support for .closest(filter, DOMElement). Fixes #4072.

src/traversing.js

@@ -51,13 +51,13 @@ jQuery.fn.extend({
 		return this.pushStack( jQuery.winnow(this, selector, true), "filter", selector );
 	},
 
-	closest: function( selector ) {
+	closest: function( selector, context ) {
 		var pos = jQuery.expr.match.POS.test( selector ) ? jQuery(selector) : null,
 			closer = 0;
 
 		return this.map(function(){
 			var cur = this;
-			while ( cur && cur.ownerDocument ) {
+			while ( cur && cur.ownerDocument && cur !== context ) {
 				if ( pos ? pos.index(cur) > -1 : jQuery(cur).is(selector) ) {
 					jQuery.data(cur, "closest", closer);
 					return cur;

test/unit/traversing.js

@@ -91,7 +91,7 @@ test("filter(jQuery)", function() {
 })
 
 test("closest()", function() {
-	expect(6);
+	expect(9);
 	isSet( jQuery("body").closest("body").get(), q("body"), "closest(body)" );
 	isSet( jQuery("body").closest("html").get(), q("html"), "closest(html)" );
 	isSet( jQuery("body").closest("div").get(), [], "closest(div)" );
@@ -99,6 +99,12 @@ test("closest()", function() {
 
 	isSet( jQuery("div:eq(1)").closest("div:first").get(), [], "closest(div:first)" );
 	isSet( jQuery("div").closest("body:first div:last").get(), q("fx-tests"), "closest(body:first div:last)" );
+
+	// Test .closest() limited by the context
+	var jq = jQuery("#nothiddendivchild");
+	isSet( jq.closest("html", document.body).get(), [], "Context limited." );
+	isSet( jq.closest("body", document.body).get(), [], "Context limited." );
+	isSet( jq.closest("#nothiddendiv", document.body).get(), q("nothiddendiv"), "Context not reached." );
 });
 
 test("not(Selector)", function() {