trezor-wallet/src/utils/build.js

/* @flow */

// process.env.BUILD is set by package.json
// process.env.NODE_ENV is set by webpack.mode

export const isDev = (): boolean =>
    process.env.BUILD === 'development' || process.env.NODE_ENV === 'development';
export const isBeta = (): boolean => process.env.BUILD === 'beta';