1 files changed, 2 insertions, 0 deletions
diff --git a/src/apis.js b/src/apis.js
index 4e2cca0b..3ccd95d7 100644
--- a/src/apis.js
+++ b/src/apis.js
@@ -1,3 +1,5 @@
+'use strict';
+
 var angularGlobal = {
   'typeOf':function(obj){
     if (obj === null) return $null;