fix: animation no work #1540

Author: wangxueliang

components/_util/css-animation/index.js

@@ -104,7 +104,10 @@ const cssAnimation = (node, transitionName, endCallback) => {
 
   node.rcAnimTimeout = requestAnimationTimeout(() => {
     node.rcAnimTimeout = null;
+
+    nodeClasses.add(className);
     nodeClasses.add(activeClassName);
+
     if (active) {
       requestAnimationTimeout(active, 0);
     }