webpack.config.js

const path = require('path');
const defaultConfig = require('@wordpress/scripts/config/webpack.config');

module.exports = {
  ...defaultConfig,

  entry: {
    app: './src/index.tsx',
  },

  output: {
    path: path.resolve(__dirname, 'dist'),
    filename: '[name].js',
  },

  resolve: {
    extensions: ['.tsx', '.ts', '.js'],
  },

  module: {
    rules: [
      {
        test: /\.ts(x)?$/,
        exclude: /(node_modules|bower_components)/,
        use: {
          loader: 'ts-loader',
          options: {
            configFile: 'tsconfig.json',
            transpileOnly: true
          }
        },
      },
      {
        test: /\.js$/,
        exclude: /(node_modules|bower_components)/,
        use: {
          loader: 'babel-loader',
          options: {
            presets: ['@babel/preset-env', '@babel/preset-react', '@babel/preset-typescript'],
          },
        },
      },
      {
        test: /\.(png|jpg|jpeg|gif|svg)$/,
        use: [
          {
            loader: 'file-loader',
            options: {
              name: '[name].[ext]',
              outputPath: 'images/',
            },
          },
        ],
      },
      {
        test: /\.scss$/,
        use: ['style-loader', 'css-loader', 'sass-loader'],
      },
    ],
  },

  devtool: 'source-map',
  mode: 'production'
};