function withCommonsChunk({ webpackConfig }) {
  const { splitChunks } = webpackConfig.optimization;

  if (splitChunks.cacheGroups == null) {
    splitChunks.cacheGroups = {};
  }

  splitChunks.cacheGroups.commons = {
    test: /[\\/]src[\\/]common[\\/]/,
    chunks: 'all',
    name: 'commons'
  }

  return webpackConfig;
}