add Symbol existence check to typeof helper - closes #2745

2015-11-02 19:26:49 +00:00
parent d1d0ed901e
commit 31a6cb9c57
1 changed files with 1 additions and 1 deletions
--- a/packages/babel-helpers/src/helpers.js
+++ b/packages/babel-helpers/src/helpers.js
@@ -2,7 +2,7 @@ import template from "babel-template";

 export let _typeof = template(`
  (function (obj) {
-    return obj && obj.constructor === Symbol ? "symbol" : typeof obj;
+    return obj && typeof Symbol !== "undefined" && obj.constructor === Symbol ? "symbol" : typeof obj;
  });
 `);