diff --git a/src/animations/animation.ts b/src/animations/animation.ts
index 95a2326ba6..5313d93ceb 100644
--- a/src/animations/animation.ts
+++ b/src/animations/animation.ts
@@ -68,13 +68,13 @@ export class Animation {
     var i: number;
 
     if (ele) {
-      if (ele.length) {
+      if (typeof ele === 'string') {
+        ele = document.querySelectorAll(ele);
         for (i = 0; i < ele.length; i++) {
           this._addEle(ele[i]);
         }
 
-      } else if (typeof ele === 'string') {
-        ele = document.querySelectorAll(ele);
+      } else if (ele.length) {
         for (i = 0; i < ele.length; i++) {
           this._addEle(ele[i]);
         }