Support event delegation with relative selectors. Fixes #10762. Closes gh-860.

src/traversing.js

 var runtil = /Until$/,
 	rparentsprev = /^(?:parents|prev(?:Until|All))/,
 	isSimple = /^.[^:#\[\.,]*$/,
-	POS = jQuery.expr.match.globalPOS,
+	rneedsContext = jQuery.expr.match.needsContext,
 	// methods guaranteed to produce a unique set when starting from a unique set
 	guaranteedUnique = {
 		children: true,
@@ -72,9 +72,9 @@ jQuery.fn.extend({
 	is: function( selector ) {
 		return !!selector && (
 			typeof selector === "string" ?
-				// If this is a positional selector, check membership in the returned set
+				// If this is a positional/relative selector, check membership in the returned set
 				// so $("p:first").is("p:last") won't return true for a doc with two "p".
-				POS.test( selector ) ?
+				rneedsContext.test( selector ) ?
 					jQuery( selector, this.context ).index( this[0] ) >= 0 :
 					jQuery.filter( selector, this ).length > 0 :
 				this.filter( selector ).length > 0 );
@@ -85,7 +85,7 @@ jQuery.fn.extend({
 			i = 0,
 			l = this.length,
 			ret = [],
-			pos = POS.test( selectors ) || typeof selectors !== "string" ?
+			pos = rneedsContext.test( selectors ) || typeof selectors !== "string" ?
 				jQuery( selectors, context || this.context ) :
 				0;
 

test/unit/event.js

@@ -2342,17 +2342,20 @@ test("jQuery.off using dispatched jQuery.Event", function() {
 		.remove();
 });
 
-test( "delegated event with delegateTarget-relative selector (#)", function() {
-	expect(1);
-	var markup = jQuery( '<ul><li><ul id="u1"><li id="f1"></li></ul></li>' ).appendTo("body");
+test( "delegated event with delegateTarget-relative selector", function() {
+	expect(2);
+	var markup = jQuery( '<ul><li><a id="a0"></a><ul id="ul0"><li><a id="a0_0"></a></li><li><a id="a0_1"></a></li></ul></li></ul>' ).appendTo("body");
 
 	markup
-		.find("#u1")
-			.on( "click", "li:first", function() {
-				ok( this.id === "f1" , "first li under #u1 was clicked" );
+		.on( "click", ">li>a", function() {
+			ok( this.id === "a0", "child li was clicked" );
+		})
+		.find("#ul0")
+			.on( "click", "li:first>a", function() {
+				ok( this.id === "a0_0" , "first li under #u10 was clicked" );
 			})
-			.find("#f1").click().end()
 		.end()
+		.find("a").click().end()
 		.remove();
 });