webpack.config.js

const webpack = require('webpack');
const TerserPlugin = require('terser-webpack-plugin');

module.exports = {
  mode: 'production',
  context: __dirname + '/src',
  entry: './crunker.ts',
  output: {
    path: __dirname + '/dist',
    filename: 'crunker.js',
    library: 'Crunker',
    libraryTarget: 'umd',
    umdNamedDefine: true,
    globalObject: "typeof self !== 'undefined' ? self : this",
  },
  devtool: 'source-map',
  module: {
    rules: [
      {
        test: /\.ts$/,
        exclude: /node_modules/,
        loader: 'babel-loader',
        options: {
          presets: [
            [
              '@babel/preset-env',
              { exclude: ['@babel/plugin-transform-regenerator', '@babel/plugin-transform-async-to-generator'] },
            ],
            '@babel/preset-typescript',
          ],
        },
      },
    ],
  },
  optimization: {
    minimize: true,
    minimizer: [new TerserPlugin()],
  },
  plugins: [
    new webpack.DefinePlugin({
      'process.env.NODE_ENV': JSON.stringify(process.env.NODE_ENV),
    }),
  ],
};