timpla/babel.config.js

const debug = process.env.DEBUG === 'timpla'
const isProduction = process.env.NODE_ENV === 'production'

module.exports = {
  presets: [
    [
      '@babel/preset-env',
      {
        // usage automatically injects @babel/polyfill, so older browsers may still work
        // see https://babeljs.io/docs/en/babel-polyfill
        // We're only loading this for production builds so development compilation times are faster!
        ...(isProduction && { useBuiltIns: 'usage' }),
        debug,
      },
    ],
    '@babel/preset-typescript',
    '@babel/preset-react',
  ],
  plugins: ['react-hot-loader/babel'],
}