webpack.config.js

const path = require('path');

module.exports = {
  mode: 'production',
  entry: './src/index.ts',
  output: {
    path: path.resolve(__dirname, 'lib/umd'),
    filename: 'particlesystems.js',
    library: 'particleSystems',
    libraryTarget: 'umd'
  },

  resolve: {
    extensions: [".ts", ".js"]
  },

  module: {
    rules: [
      // All files with a '.ts' or '.tsx' extension will be handled by 'ts-loader'.
      {
        test: /\.ts$/,
        loader: "ts-loader"
      },

      // All output '.js' files will have any sourcemaps re-processed by 'source-map-loader'.
      {
        enforce: "pre",
        test: /\.js$/,
        loader: "source-map-loader"
      }
    ]
  }  
};