babel.config.js

const sharedConfig = require('./config/webpack.config.shared')
const paths = require('./config/paths')

module.exports = function (api) {
  if (api) {
    api.cache(true)
  }

  const reactCSSModulesPlugin = [
    'react-css-modules',
    {
      generateScopedName: sharedConfig.cssLoader.options.localIdentName,
      filetypes: {
        '.scss': 'postcss-scss'
      },
      exclude: 'node_modules',
      searchPaths: [
        'src'
      ]
    }
  ]

  return {
    presets: [
      [
        '@babel/preset-env',
        { targets: { node: 'current' } }
      ],
      '@babel/preset-react'
    ],
    plugins: [
      '@babel/plugin-transform-runtime',
      '@babel/plugin-proposal-class-properties',
      '@babel/plugin-proposal-optional-chaining',
      [
        'module-resolver',
        {
          root: ['src'],
          extensions: ['.graphql']
        }
      ],
      /*
        Disabling this by default: when it runs, it generates keys for missing translations
        It also sometimes overwrites newly added translations, causing a lot of finicky editing.
        When you add a new translation, uncomment the below config, restart webpack (yarn start) and it should pick up the key for every locale file
      */
      // [
      //   'i18next-extract',
      //   {
      //     keySeparator: null,
      //     locales: ['es', 'en'],
      //     nsSeparator: null,
      //     outputPath: 'public/locales/{{locale}}.json'
      //   }
      // ],
      'import-graphql',
      'inline-import',
      'lodash'
    ],
    ignore: [
      paths.resolveApp('scripts/templates/*')
    ],
    env: {
      test: {
        plugins: [
          'data-stylename'
        ]
      },
      development: {
        plugins: [
          [
            reactCSSModulesPlugin[0],
            {
              ...reactCSSModulesPlugin[1],
              webpackHotModuleReloading: true
            }
          ]
        ]
      },
      production: {
        plugins: [
          reactCSSModulesPlugin
        ],
        compact: true
      },
      server: {
        plugins: [
          reactCSSModulesPlugin
        ],
        compact: true
      }
    }
  }
}