React Native - __DEV__ is not defined

Question

I have a [email protected] project. I have deleted the node_modules folder and after i have given the following commands:

npm i
react-native upgrade

but I get this error:

react-native.js:15 

ReferenceError: __DEV__ is not defined

How do I fix?

Answer 1

Adding

/* global __DEV__ */

To the top of the file worked for me.

Answer 2

Maybe this? https://github.com/facebook/react-native/issues/7814

Removing .babelrc seems to fix the problem.

My .babelrc:

{ "presets": ["react-native"] }