webpack.config.js

/* global __dirname, require, module */

const webpack = require('webpack')
const UglifyJsPlugin = webpack.optimize.UglifyJsPlugin
const path = require('path')
const env = require('yargs').argv.env // use --env with webpack 2

const libraryName = 'Overdrive'

const plugins = []
let outputFile

if (env === 'build') {
  plugins.push(new UglifyJsPlugin({ minimize: true }))
  outputFile = libraryName + '.min.js'
} else {
  outputFile = libraryName + '.js'
}

const config = {
  entry: path.join(__dirname, '/src/index.js'),
  devtool: 'source-map',
  output: {
    path: path.join(__dirname, '/lib'),
    filename: outputFile,
    library: libraryName,
    libraryTarget: 'umd',
    umdNamedDefine: true
  },
  module: {
    rules: [
      {
        test: /(\.jsx|\.js)$/,
        loader: 'babel-loader',
        exclude: /(node_modules|bower_components)/,
        query: {
          presets: ['react', ['es2015', { modules: false }], 'es2017'],
          plugins: [
            'transform-runtime',
            'transform-decorators-legacy',
            'transform-class-properties',
            'transform-object-rest-spread'
          ]
        }
      }
    ]
  },
  externals: {
    react: {
      root: 'React',
      commonjs2: 'react',
      commonjs: 'react',
      amd: 'react'
    },
    'react-dom': {
      root: 'ReactDOM',
      commonjs2: 'react-dom',
      commonjs: 'react-dom',
      amd: 'react-dom'
    }
  },
  plugins: plugins
}

module.exports = config