webpack config

const path = require('path');
const HtmlWebpackPlugin = require('html-webpack-plugin');
const { CleanWebpackPlugin } = require('clean-webpack-plugin');
const TerserPlugin = require('terser-webpack-plugin');
const MiniCssExtractPlugin = require('mini-css-extract-plugin');
const { DefinePlugin } = require('webpack');
const dotEnv = require('dotenv').config();

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

module.exports = {
  mode: process.env.NODE_ENV,
  entry: {
    main: [ 'whatwg-fetch', '@babel/polyfill', './src/index.js' ],
  },
  output: {
    path: path.resolve(__dirname, 'build'),
    filename: isEnvProduction ? '[name].[hash:10].js' : '[name].js',
    chunkFilename: isEnvProduction ? '[name].[hash:10].chunk.js' : '[name].chunk.js',
    publicPath: '/',
  },
  resolve: {
    modules: [ path.resolve(__dirname, 'node_modules') ],
    ...require('./webpack.config.alias').resolve,
  },
  module: {
    rules: [
      {
        test: /\.(js|jsx)$/,
        exclude: [
          /node_modules\/(?!ansi-regex).*/,
        ],
        use: {
          loader: 'babel-loader',
          options: {
            presets: [
              [ '@babel/preset-env', { modules: false } ],
              '@babel/preset-react',
            ],
            plugins: [
              [
                'babel-plugin-styled-components',
                {
                  ssr: false,
                  displayName: !isEnvProduction,
                  fileName: false,
                  minify: isEnvProduction,
                  transpileTemplateLiterals: isEnvProduction,
                  pure: false,
                },
              ],
              '@babel/plugin-transform-regenerator',
              '@babel/plugin-proposal-class-properties',
            ],
          },
        },
      },
      {
        test: /\.font\.js/,
        use: [
          MiniCssExtractPlugin.loader,
          'css-loader',
          {
            loader: 'webfonts-loader',
            options: {
              fileName: '[name].[hash:8].[ext]',
            },
          },
        ],
      },
      {
        test: /\.(jpg|jpeg|png|gif|svg)$/,
        loader: 'file-loader',
        options: {
          name: '[name].[hash:8].[ext]',
        },
      },
      {
        test: /\.(ttf|eot|woff2?)$/,
        loader: 'file-loader',
        options: {
          name: '[name].[ext]',
        },
      },
      {
        test: /\.css$/i,
        use: [ 'style-loader', 'css-loader' ],
      },
    ],
  },
  devServer: {
    open: true,
    overlay: true,
    port: process.env.PORT,
    quiet: true,
    disableHostCheck: true,
    writeToDisk: true,
    historyApiFallback: true,
    proxy: {
      '/api': {
        target: process.env.PROXY_URL,
      },
      '/uploads': {
        target: process.env.PROXY_URL,
      },
    },
  },
  optimization: {
    minimize: isEnvProduction,
    minimizer: [
      new TerserPlugin({
        terserOptions: {
          parse: {
            ecma: 8,
          },
          warnings: false,
          compress: {
            ecma: 5,
            warnings: false,
            comparisons: false,
            inline: 2,
          },
          mangle: true,
          output: {
            ecma: 5,
            comments: false,
            ascii_only: true,
          },
        },
        parallel: true,
        cache: true,
        sourceMap: true,
      }),
    ],
    splitChunks: {
      chunks: 'all',
    },
  },
  devtool: isEnvProduction ? 'source-map' : 'eval-cheap-module-source-map',
  performance: false,
  plugins: [
    new DefinePlugin({
      'process.env': JSON.stringify(dotEnv.parsed),
    }),
    new HtmlWebpackPlugin({
      template: './src/index.html',
      filename: './index.html',
      favicon: './src/assets/images/favicon.ico',
      showErrors: true,
      inject: true,
    }),
    new CleanWebpackPlugin(),
    new MiniCssExtractPlugin({
      filename: '[name].[hash:10].css',
    }),
  ],
};