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babel-plugin-env-constants

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Transform __DEV__, __PROD__, and __TEST__ constants to process.env.NODE_ENV conditionals.

// Inputif (__DEV__) {    console.log('Some message in development!');}
const value = __TEST__ ? 0 : 100;
// Outputif (process.env.NODE_ENV !== 'production') {    console.log('Some message in development!');}
const value = process.env.NODE_ENV === 'test' ? 0 : 100;

Installation#

yarn add --dev babel-plugin-env-constants

Add the plugin to your root babel.config.* file.

module.exports = {    plugins: ['babel-plugin-env-constants'],};

And if you are using TypeScript, you'll most likely need to declare the globals yourself.

declare global {    const __DEV__: boolean;    const __PROD__: boolean;    const __TEST__: boolean;}

Requirements#

  • Linux, OSX, Windows
  • Node 12.17+

Index

Functions