Fix #11145: Harden dispatch against a form-aliased "disabled" property

src/event.js

@@ -399,7 +399,7 @@ jQuery.event = {
 
 		// Determine handlers that should run if there are delegated events
 		// Avoid disabled elements in IE (#6911) and non-left-click bubbling in Firefox (#3861)
-		if ( delegateCount && !event.target.disabled && !(event.button && event.type === "click") ) {
+		if ( delegateCount && event.target.disabled !== true && !(event.button && event.type === "click") ) {
 
 			// Pregenerate a single jQuery object for reuse with .is()
 			jqcur = jQuery(this);

test/unit/event.js

@@ -1213,25 +1213,38 @@ test("Delegated events in SVG (#10791)", function() {
 	svg.remove();
 });
 
-test("Delegated events in forms (#10844)", function() {
-	expect(1);
+test("Delegated events in forms (#10844; #11145)", function() {
+	expect(2);
 
 	// Aliases names like "id" cause havoc
 	var form = jQuery(
 			'<form id="myform">'+
 			'<input type="text" name="id" value="secret agent man" />'+
 			'</form>'
-		).appendTo( "body" );
-
-	jQuery( "body" )
+		)
+		.on( "submit", function( event ) {
+			event.preventDefault();
+		})
+		.appendTo("body");
+
+	jQuery("body")
+		.on( "submit", "#myform", function() {
+			ok( true, "delegated id selector with aliased id" );
+		})
+		.find("#myform")
+			.trigger("submit")
+		.end()
+		.off("submit");
+
+	form.append('<input type="text" name="disabled" value="differently abled" />');
+	jQuery("body")
 		.on( "submit", "#myform", function() {
-			ok( true, "delegated id selector with aliased name" );
-			return false;
+			ok( true, "delegated id selector with aliased disabled" );
 		})
-		.find( "#myform" )
-			.trigger( "submit" )
+		.find("#myform")
+			.trigger("submit")
 		.end()
-		.off( "submit" );
+		.off("submit");
 
 	form.remove();
 });