webpack.config.js

// Generated using webpack-cli https://github.com/webpack/webpack-cli

const path = require('path');
const webpack = require('webpack');
const HtmlWebpackPlugin = require('html-webpack-plugin');
const MiniCssExtractPlugin = require('mini-css-extract-plugin');
const WorkboxWebpackPlugin = require('workbox-webpack-plugin');

const isProduction = process.env.NODE_ENV === 'production';

const stylesHandler = MiniCssExtractPlugin.loader;

const config = {
  entry: './src/index.js',
  output: {
    path: path.resolve(__dirname, 'dist'),
    filename: '[name].bundle.js',
    publicPath: '/'
  },
  devServer: {
    open: true,
    host: 'localhost'
  },
  plugins: [
    new HtmlWebpackPlugin({
      title: 'Production',
      template: 'public/index.html'
    }),

    new MiniCssExtractPlugin(),
    new webpack.HotModuleReplacementPlugin()
  ],
  module: {
    rules: [
      {
        test: /\.html$/,
        use: [{ loader: 'html-loader' }]
      },
      {
        test: /\.(js|jsx)$/i,
        exclude: /(node_modules)/,
        loader: 'babel-loader'
      },
      {
        test: /\.s[ac]ss$/i,
        use: [stylesHandler, 'css-loader', 'postcss-loader', 'sass-loader']
      },
      {
        test: /\.css$/i,
        use: [stylesHandler, 'css-loader', 'postcss-loader']
      },
      {
        test: /\.(ttf|eot|woff|woff2)$/,
        use: {
          loader: 'file-loader'
        }
      },
      {
        test: /\.(png|jpg)$/,
        use: [
          {
            loader: 'url-loader',
            options: {
              limit: 8192
            }
          }
        ]
      },
      {
        test: /\.svg$/,
        use: [
          {
            loader: '@svgr/webpack'
          }
        ]
      }
    ]
  }
};

module.exports = () => {
  if (isProduction) {
    config.mode = 'production';
    config.plugins.push(new WorkboxWebpackPlugin.GenerateSW());
  } else {
    config.devtool = 'source-map';
    config.mode = 'development';
  }
  return config;
};