webpack.config.js

const TerserPlugin = require('terser-webpack-plugin');
const path = require('path');

module.exports = {
  entry: './src/index.js',
  optimization: {
    minimize: true,
    minimizer: [
      new TerserPlugin({
        terserOptions: {
          ecma: undefined,
          warnings: false,
          parse: {},
          compress: {},
          mangle: true,
          module: false,
          output: null,
          toplevel: false,
          nameCache: null,
          ie8: false,
          keep_classnames: undefined,
          keep_fnames: true,
          safari10: false,
        },
      }),
    ],
  },
  module: {
    rules: [
      {
        test: /\.js$/,
        exclude: /node_modules/,
        use: {
          loader: 'babel-loader',
          options: {
            plugins: [
              [
                require.resolve('babel-plugin-named-asset-import'),
                {
                  loaderMap: {
                    svg: {
                      ReactComponent: '@svgr/webpack?-prettier,-svgo![path]',
                    },
                  },
                },
              ],
            ],
          },
        },
      },
      {
        test: /\.scss$/,
        use: [{ loader: 'style-loader' }, { loader: 'css-loader' }, { loader: 'sass-loader' }],
      },
      {
        test: /\.(png|gif|jpg|svg)$/,
        use: {
          loader: 'url-loader',
          options: {
            limit: 50000,
          },
        },
      },
    ],
  },
  resolve: {
    extensions: ['.scss', '.js', '.json', '.png', '.gif', '.jpg', '.svg'],
    alias: {
      'react': path.resolve(__dirname, 'node_modules/react'),
      'react-dom': path.resolve(__dirname, 'node_modules/react-dom'),
    }
  },
  output: {
    path: path.resolve(__dirname, 'dist/'),
    publicPath: '',
    filename: 'index.js',
    libraryTarget: 'umd',
  },
  externals: ['react', 'react-dom'],
};