webpack.config.js

const path = require('path');
const webpack = require('webpack');
const ForkTsCheckerWebpackPlugin = require('fork-ts-checker-webpack-plugin');
const { CleanWebpackPlugin } = require('clean-webpack-plugin');
const Dotenv = require('dotenv-webpack');

module.exports = (env, argv) => {
  const config = {
    mode: 'production',
    entry: ['./src/index.tsx'],
    target: 'node',
    output: {
      path: path.resolve(__dirname, 'dist'),
      filename: 'index.js',
    },
    node: {
      __dirname: false,
      __filename: false,
    },
    module: {
      rules: [
        {
          test: /\.([jt])sx?$/,
          exclude: /node_modules/,
          use: {
            loader: 'babel-loader',
            options: { cacheDirectory: true, cacheCompression: false },
          },
        },
        {
          test: /\.(png|jpe?g|gif|svg|bmp)$/i,
          use: [{ loader: 'file-loader' }],
        },
        {
          test: /\.node/i,
          use: [{ loader: 'node-loader' }, { loader: 'file-loader' }],
        },
      ],
    },
    plugins: [
      new Dotenv({
        safe: true,
      }),
      new webpack.IgnorePlugin(/vertx/),
    ],
    resolve: {
      extensions: ['.tsx', '.ts', '.js', '.jsx', '.json'],
    },
  };

  if (argv.mode === 'development') {
    config.mode = 'development';
    config.plugins.push(new webpack.HotModuleReplacementPlugin());
    config.plugins.push(new ForkTsCheckerWebpackPlugin());
    config.devtool = 'source-map';
    config.watch = true;
    config.entry.unshift('webpack/hot/poll?100');
  }

  if (argv.p) {
    config.plugins.push(new CleanWebpackPlugin());
  }
  return config;
};