timerId has to be set to true, to avoid starting multiple animation queues

diff --git a/src/effects.js b/src/effects.js
index 196807ecba60f2061cfa9dcd2e1b85fa2c6dfc26..82548611a937713cec28da94f19c788156268a9d 100644 (file)
--- a/src/effects.js
+++ b/src/effects.js
@@ -363,9 +363,9 @@ jQuery.fx.prototype = {
                t.elem = this.elem;
 
                if ( t() && jQuery.timers.push(t) && !timerId ) {
-                       jQuery.support.requestAnimationFrame ?
-                               window[jQuery.support.requestAnimationFrame](fx.tick):
-                               timerId = setInterval(fx.tick, fx.interval);
+                       timerId = jQuery.support.requestAnimationFrame ?
+                               !window[jQuery.support.requestAnimationFrame](fx.tick):
+                               setInterval(fx.tick, fx.interval);
                }
        },