Transform __DEV__, __PROD__, and __TEST__ constants to NODE_ENV conditionals.
npm install babel-plugin-env-constants
Transform __DEV__, __PROD__, and __TEST__ constants to process.env.NODE_ENV conditionals.
``ts
// Input
if (__DEV__) {
console.log('Some message in development!');
}
const value = __TEST__ ? 0 : 100;
`
`ts
// Output
if (process.env.NODE_ENV !== 'production') {
console.log('Some message in development!');
}
const value = process.env.NODE_ENV === 'test' ? 0 : 100;
`
`
yarn add --dev babel-plugin-env-constants
Add the plugin to your root babel.config.* file.
`js`
module.exports = {
plugins: ['babel-plugin-env-constants'],
};
And if you are using TypeScript, you'll most likely need to declare the globals yourself.
`ts``
declare global {
const __DEV__: boolean;
const __PROD__: boolean;
const __TEST__: boolean;
}
- Linux, OSX, Windows
- Node 18.12+