webpack.config.js

const webpack = require('webpack');
const path = require('path');
const env = require('yargs').argv.mode;

const UglifyJsPlugin = webpack.optimize.UglifyJsPlugin;

const libraryName = 'FormStore';

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/FormStore.js'),
  devtool: 'source-map',
  output: {
    path: path.join(__dirname, '/lib'),
    filename: outputFile,
    library: libraryName,
    libraryTarget: 'umd',
    umdNamedDefine: true,
  },
  externals: {
    mobx: 'mobx',
  },
  module: {
    loaders: [
      {
        test: /(\.jsx|\.js)$/,
        loader: 'babel',
        exclude: /(node_modules)/,
      },
    ],
  },
  resolve: {
    root: path.resolve('./src'),
    extensions: ['', '.js'],
  },
  plugins,
};

module.exports = config;