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add Symbol existence check to typeof helper - closes #2745

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Sebastian McKenzie 2015-11-02 19:26:49 +00:00
parent d1d0ed901e
commit 31a6cb9c57
1 changed files with 1 additions and 1 deletions
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2
packages/babel-helpers/src/helpers.js
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@ -2,7 +2,7 @@ import template from "babel-template";
export let _typeof = template(` export let _typeof = template(`
(function (obj) { (function (obj) {
return obj && obj.constructor === Symbol ? "symbol" : typeof obj; return obj && typeof Symbol !== "undefined" && obj.constructor === Symbol ? "symbol" : typeof obj;
}); });
`); `);