there was no way to 'manually' stop an animation

diff --git a/src/effects.js b/src/effects.js
index 82548611a937713cec28da94f19c788156268a9d..6a72a88fd0ec72e737c9389fc16a8b2d50e8b4e2 100644 (file)
--- a/src/effects.js
+++ b/src/effects.js
@@ -470,7 +470,7 @@ jQuery.extend( jQuery.fx, {
 
                if ( !timers.length ) {
                        jQuery.fx.stop();
-               } else if ( jQuery.support.requestAnimationFrame ) {
+               } else if ( jQuery.support.requestAnimationFrame && timerId) {
                        window[jQuery.support.requestAnimationFrame](jQuery.fx.tick);
                }
        },