React-native : detect dev or production env

Question

I develop a react-native app where some API calls should be made.

If I\'m in production mode my app should call, for example, this host :

https://exa         


        

Answer 1

Set automatically

The constant __DEV__ is set automatically.

Production

Building the bundle via --dev=false should unset __DEV__.

Usage

if (__DEV__) {
    console.log('Development');
} else {
    console.log('Production');
}