webpack.config.prod.js

const Webpack = require('webpack');
const { merge } = require('webpack-merge');
const { CleanWebpackPlugin } = require('clean-webpack-plugin');
const svgToMiniDataURI = require('mini-svg-data-uri');
const common = require('./webpack.common.js');

module.exports = merge(common, {
  mode: 'production',
  stats: 'errors-warnings',
  bail: true,
  devtool: false,
  output: {
    filename: '[name].js',
    chunkFilename: '[name].chunk.js'
  },
  plugins: [
    new CleanWebpackPlugin(),
    new Webpack.DefinePlugin({
      'process.env.NODE_ENV': JSON.stringify('production')
    }),
    new Webpack.optimize.ModuleConcatenationPlugin()
  ],
  module: {
    rules: [
      {
        test: /\.(js)$/,
        exclude: /node_modules/,
        use: 'babel-loader'
      },
      {
        test: /\.(ico|jpg|jpeg|png|gif|eot|otf|webp|ttf|woff|woff2)(\?.*)?$/,
        type: 'asset/resource',
        generator: {
          filename: 'static/[name][ext][query]'
        }
      },
      {
        test: /\.svg/,
        type: 'asset/inline',
        generator: {
          dataUrl: content => {
            content = content.toString();
            return svgToMiniDataURI(content);
          }
        }
      },
      {
        test: /\.s?css/i,
        use : [
          {
            loader: 'style-loader'
          },
          {
            loader: 'css-loader',
            options: {
              importLoaders: 1
            }
          },
          {
            loader: 'postcss-loader',
            options: {
              postcssOptions: {
                ident: 'postcss',
                plugins: [
                  'postcss-preset-env',
                  'cssnano',
                  'autoprefixer'
                ]
              }
            }
          },
          {
            loader: 'sass-loader',
            options: {
              implementation: require('sass')
            }
          }
        ]
      }
    ]
  }
});