module.exports = {
  mode: 'production',
  entry: {
    index: [
      'babel-polyfill',
      './src/index.js',
    ],
  },
  output: {
    path: srcBuild,
    filename: '[name].js',
    chunkFilename: '[name].[chunkhash].js',
    libraryTarget: 'commonjs',
    libraryExport: 'default',
  },
  optimization: {
    noEmitOnErrors: true,
    minimizer: [
      new TerserPlugin({
        cache: true,
        parallel: true,
        sourceMap: true,
        terserOptions: {
          mangle: false,
          compress: {
            reduce_funcs: false,
            reduce_vars: false,
            keep_classnames: true,
            keep_fnames: true,
            keep_fargs: true,
            pure_getters: true,
          },
        },
      }),
   ],
}