webpack.config.js

'use strict';

var webpack = require('webpack')

var env = process.env.NODE_ENV
var config = {
  module: {
    loaders: [
      { test: /\.js$/, loaders: ['babel-loader'], exclude: /node_modules/ }
    ]
  },
  output: {
    library: 'react-reach',
    libraryTarget: 'umd'
  },
  externals: [
    {
      'isomorphic-fetch': {
        root: 'fetch',
        commonjs2: 'isomorphic-fetch',
        commonjs: 'isomorphic-fetch',
        amd: 'isomorphic-fetch'
      }
    }
  ],
  plugins: [
    new webpack.optimize.OccurenceOrderPlugin(),
    new webpack.DefinePlugin({
      'process.env.NODE_ENV': JSON.stringify(env)
    })
  ]
};

if (env === 'production') {
  config.plugins.push(
    new webpack.optimize.UglifyJsPlugin({
      compressor: {
        pure_getters: true,
        unsafe: true,
        unsafe_comps: true,
        screw_ie8: true,
        warnings: false
      }
    })
  )
}

module.exports = config