diff --git a/ionic/animations/animation.ts b/ionic/animations/animation.ts
index 4d221f8170..c363d22864 100644
--- a/ionic/animations/animation.ts
+++ b/ionic/animations/animation.ts
@@ -70,7 +70,7 @@ export class Animation {
         }
 
       } else if (typeof ele === 'string') {
-        ele = doc.querySelectorAll(ele);
+        ele = document.querySelectorAll(ele);
         for (i = 0; i < ele.length; i++) {
           this._addEle(ele[i]);
         }
@@ -378,8 +378,10 @@ export class Animation {
   }
 
   _clearAsync() {
-    this._unregTrans && this._unregTrans();
-    clearTimeout(this._tmr);
+    if (this._tmr) {
+      this._unregTrans && this._unregTrans();
+      clearTimeout(this._tmr);
+    }
   }
 
   _progress(stepValue: number) {
@@ -781,8 +783,6 @@ interface EffectState {
   unit: string;
 }
 
-const doc: any = document;
-
 const TRANSFORMS = {
   'translateX':1, 'translateY':1, 'translateZ':1,
   'scale':1, 'scaleX':1, 'scaleY':1, 'scaleZ':1,