From 0962d6c1ff803ec35f706191554061e7ad297b6a Mon Sep 17 00:00:00 2001
From: Yvonne Yip <ykyyip@google.com>
Date: Wed, 6 Nov 2013 11:47:49 -0800
Subject: [PATCH] polymer-overlay: add .animating class when transitioning

---
 polymer-overlay/polymer-overlay.html | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/polymer-overlay/polymer-overlay.html b/polymer-overlay/polymer-overlay.html
index 1e93936..9cac4c3 100644
--- a/polymer-overlay/polymer-overlay.html
+++ b/polymer-overlay/polymer-overlay.html
@@ -291,6 +291,8 @@
             animation.apply(),
             new Animation(this.target, [{'visibility': 'visible', 'display':'block'}])
           ], {fill: 'none'});
+          transition.onend = this.completeOpening.bind(this);
+          this.target.classList.add('animating');
           document.timeline.play(transition);
         },
         renderOpened: function() {
@@ -315,6 +317,7 @@
           }
         },
         completeOpening: function() {
+          this.target.classList.remove('animating');
           this.target.classList.toggle('revealed', this.opened);
           if (!this.opened) {
             this.resetTargetPosition();