Entry/webpack.config.js

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

module.exports = {
  optimization: {
    minimizer: [new TerserPlugin({
    	terserOptions: {
          ecma: undefined,
          warnings: false,
          parse: {},
          compress: {},
          mangle: true, // Note `mangle.properties` is `false` by default.
          module: false,
          output: null,
          toplevel: false,
          nameCache: null,
          ie8: false,
          keep_classnames: true,
          keep_fnames: true,
          safari10: false,
        }
    })],
  },
  entry: './src/export.js',
  output: {
    filename: 'bundle.js',
    path: path.resolve(__dirname, 'dist')
  },
  module: {
    rules: [
      {
        test: /\.css$/i,
        use: ['style-loader', 'css-loader'],
      },
      {
        test: /\.js$/,
        exclude: /(node_modules|bower_components)/,
      	use: 'babel-loader'
      }
    ]
  }
};