Event: Cover invalid delegation selector edge cases

Ref 7fd36ea145a11d5896de6d064b546b1c57a83f34

2 files changed, 15 insertions, 11 deletions

diff --git a/src/event.js b/src/event.js
index 3f1c5f31a..1c29a6b09 100644
--- a/src/event.js
+++ b/src/event.js
@@ -1,13 +1,14 @@
 define( [
 	"./core",
 	"./var/document",
+	"./var/documentElement",
 	"./var/rnotwhite",
 	"./var/slice",
 	"./data/var/dataPriv",
 
 	"./core/init",
 	"./selector"
-], function( jQuery, document, rnotwhite, slice, dataPriv ) {
+], function( jQuery, document, documentElement, rnotwhite, slice, dataPriv ) {
 
 "use strict";
 
@@ -120,9 +121,10 @@ jQuery.event = {
 			selector = handleObjIn.selector;
 		}
 
-		// If the selector is invalid, throw any exceptions at attach time
+		// Ensure that invalid selectors throw exceptions at attach time
+		// Evaluate against documentElement in case elem is a non-element node (e.g., document)
 		if ( selector ) {
-			jQuery.find( selector, elem );
+			jQuery.find.matchesSelector( documentElement, selector );
 		}
 
 		// Make sure that the handler has a unique ID, used to find/remove it later
diff --git a/test/unit/event.js b/test/unit/event.js
index 6b4af04b9..5d4108c90 100644
--- a/test/unit/event.js
+++ b/test/unit/event.js
@@ -1289,17 +1289,19 @@ QUnit.test( "Delegated events in SVG (#10791; #13180)", function( assert ) {
 	jQuery( "#qunit-fixture" ).off( "click" );
 } );
 
-QUnit.test( "Delegated events with malformed selectors (#3071)", function( assert ) {
-	assert.expect( 2 );
+QUnit.test( "Delegated events with malformed selectors (gh-3071)", function( assert ) {
+	assert.expect( 3 );
 
-	assert.throws( function () {
-		jQuery( "#qunit-fixture" ).on( "click", "div:not", function () { } );
-	}, null, "malformed selector throws on attach" );
+	assert.throws( function() {
+		jQuery( "#foo" ).on( "click", ":not", function() {} );
+	}, "malformed selector throws on attach" );
 
-	jQuery( "#qunit-fixture" ).click();
-	assert.ok( true, "malformed selector does not throw on event" );
+	assert.throws( function() {
+		jQuery( "#foo" ).on( "click", "nonexistent:not", function() {} );
+	}, "short-circuitable malformed selector throws on attach" );
 
-	jQuery( "#qunit-fixture" ).off( "click" );
+	jQuery( "#foo > :first-child" ).click();
+	assert.ok( true, "malformed selector does not throw on event" );
 } );
 
 QUnit.test( "Delegated events in forms (#10844; #11145; #8165; #11382, #11764)", function( assert ) {