webpack.config.js

const path = require('path');

const library = 'OpenBCIUtilities';
const librarySnakeCase = 'openbci-utilities';
const libraryExport = 'default';

const config = {
  entry: {
    [librarySnakeCase]: './src/index.js',
    utilities: './src/utilities.js',
    constants: './src/constants.js',
    debug: './src/debug.js'
  },
  module: {
    rules: [
      {
        test: /\.js$/,
        exclude: /(node_modules)/,
        use: {
          loader: 'babel-loader'
        }
      }
    ]
  },
  devtool: 'eval',
  devServer: {
    compress: true,
    port: 9000
  }
};

const exportLibraryTarget = (libraryTarget, name) =>
  Object.assign({}, config, {
    output: {
      path: path.resolve(__dirname, 'dist'),
      filename: `${name}.js`,
      library,
      libraryTarget,
      libraryExport
    }
  });

module.exports = [
  exportLibraryTarget('umd', '[name]'),
  exportLibraryTarget('var', '[name].var')
];