Effects: Backporting e8ba367 to 1-8-stable - Fixes #8113 - addClass not animating

diff --git a/ui/jquery.effects.core.js b/ui/jquery.effects.core.js
index 74b29af26c992386289ae8888f516608342252d4..27bbe7c31c904845916dc549ffa899b7ab9ae271 100644 (file)
--- a/ui/jquery.effects.core.js
+++ b/ui/jquery.effects.core.js
@@ -236,7 +236,7 @@ $.effects.animateClass = function(value, duration, easing, callback) {
                        originalStyleAttr = that.attr('style') || ' ',
                        originalStyle = filterStyles(getElementStyles.call(this)),
                        newStyle,
-                       className = that.attr('class');
+                       className = that.attr('class') || "";
 
                $.each(classAnimationActions, function(i, action) {
                        if (value[action]) {