issue

webpack.prod.js

// eslint-disable-next-line import/no-extraneous-dependencies
const TerserJSPlugin = require('terser-webpack-plugin');
const CssMinimizerPlugin = require('css-minimizer-webpack-plugin');

const PRODUCTION_MODE = 'production';

process.env.BABEL_ENV = PRODUCTION_MODE;
process.env.NODE_ENV = PRODUCTION_MODE;

const baseConfig = require('./webpack.base');

// Override some configuration for development environment
const prodConfig = {
  ...baseConfig,
  mode: PRODUCTION_MODE,
  devtool: 'nosources-source-map',
  optimization: {
    minimizer: [
      new TerserJSPlugin(),
      new CssMinimizerPlugin()
    ]
  }
};

module.exports = prodConfig;