babel.config.js

module.exports = {
  only: [
    'src',
    'styleguide',
  ],
  presets: [
    [
      '@babel/preset-env',
      {
        modules: false,
      },
    ],
    '@babel/preset-react',
  ],
  plugins: [
    'array-includes',
    '@babel/plugin-transform-runtime',
    '@babel/plugin-transform-async-to-generator',
    '@babel/plugin-syntax-dynamic-import',
    '@babel/plugin-syntax-import-meta',
    '@babel/plugin-proposal-class-properties',
    '@babel/plugin-proposal-json-strings',
    [
      '@babel/plugin-proposal-decorators',
      {
        legacy: true,
      },
    ],
  ],
  env: {
    production: {
      plugins: [
        'add-module-exports',
        '@babel/plugin-transform-modules-commonjs',
      ],
    },
    test: {
      plugins: [
        '@babel/plugin-transform-modules-commonjs',
        'dynamic-import-node',
      ],
    },
  },
};