webpack.config.js

'use strict'

var webpack = require('webpack')

module.exports = {
  plugins: [
    new webpack.optimize.UglifyJsPlugin({
      compress: {
        warnings: false
      }
    })
  ],
  module: {
    loaders: [
      {
        loader: 'babel-loader',
        test: /\.js$/,
        exclude: /node_modules/
      },
      {
        test: /\.json$/,
        loader: 'json-loader'
      }
    ]
  },
  devtool: 'source-map'
}