Moved logic for handling .animate({}), doesn't queue anymore. Fixes #5459.

src/effects.js

@@ -108,6 +108,10 @@ jQuery.fn.extend({
 	animate: function( prop, speed, easing, callback ) {
 		var optall = jQuery.speed(speed, easing, callback);
 
+		if ( jQuery.isEmptyObject( prop ) ) {
+			return this.each( optall.complete );
+		}
+
 		return this[ optall.queue === false ? "each" : "queue" ](function() {
 			var opt = jQuery.extend({}, optall), p,
 				hidden = this.nodeType === 1 && jQuery(this).is(":hidden"),
@@ -181,10 +185,6 @@ jQuery.fn.extend({
 				}
 			});
 
-			if ( jQuery.isEmptyObject( prop ) ) {
-				return optall.complete.call(this);
-			}
-
 			// For JS strict compliance
 			return true;
 		});

test/unit/effects.js

@@ -120,7 +120,7 @@ test("animate option (queue === false)", function () {
 */
 
 test("animate with no properties", function() {
-	expect(1);
+	expect(2);
 	
 	var divs = jQuery("div"), count = 0;
 
@@ -129,6 +129,16 @@ test("animate with no properties", function() {
 	});
 
 	equals( divs.length, count, "Make sure that callback is called for each element in the set." );
+
+	stop();
+
+	var foo = jQuery("#foo");
+
+	foo.animate({});
+	foo.animate({top: 10}, 100, function(){
+		ok( true, "Animation was properly dequeued." );
+		start();
+	});
 });
 
 test("animate duration 0", function() {