webpack.config.js

const { resolve } = require('path')

const path = resolve(__dirname, 'dist')
const entry = './src/evrythng.polyfill.js'
const library = 'evrythng'

const babelrc = {
  presets: ['@babel/preset-env'],
  plugins: [['@babel/transform-runtime', { regenerator: true }]]
}

const browserConfig = {
  entry,
  output: {
    path,
    library,
    filename: 'evrythng.browser.js',
    libraryTarget: 'var'
  },
  module: {
    rules: [
      {
        test: /\.js$/,
        exclude: /node_modules/,
        use: {
          loader: 'babel-loader',
          options: babelrc
        }
      }
    ]
  }
}

const nodeConfig = {
  entry,
  target: 'node',
  output: {
    path,
    library,
    filename: 'evrythng.node.js',
    libraryTarget: 'umd',
    umdNamedDefine: true,
    globalObject: "typeof self !== 'undefined' ? self : this"
  },
  module: {
    rules: [
      {
        test: /\.js$/,
        exclude: /node_modules/
      }
    ]
  }
}

module.exports = [browserConfig, nodeConfig]