modularity-front/1webpack.config.js

// webpack.config.js

/* eslint-disable */
const path = require('path')
const webpack = require('webpack')
const UglifyJsPlugin = require('uglifyjs-webpack-plugin');

const ENVIRONMENT = process.env.NODE_ENV
const PRODUCTION = ENVIRONMENT === 'production'
const SOURCEMAP = !PRODUCTION || process.env.SOURCEMAP

const library = 'modularity-front' // << RENAME THIS <<
const filename = PRODUCTION ? `${library}.min.js` : `${library}.js`

const plugins = []

if (PRODUCTION) {
  plugins.push(
    new webpack.DefinePlugin({
      'process.env.NODE_ENV': JSON.stringify(ENVIRONMENT),
    }),
    new webpack.optimize.ModuleConcatenationPlugin()
  )
}

module.exports = {
  devtool: SOURCEMAP ? 'source-map' : 'none',
  entry:  `${__dirname}/src/exports.js`, // << RENAME THIS <<
  externals: {
    'react': 'react',
    'react-dom': 'react-dom',
  },
  mode: PRODUCTION ? "production" : "development",
  module: {
    rules: [{
      test:    /\.js$/,
      loader:  'babel-loader',
      exclude: /node_modules/,
    }],
  },
  output: {
    filename,
    library,
    path:           `${__dirname}/lib`,
    libraryTarget:  'umd',
    umdNamedDefine: true,
  },
  optimization: {
    minimizer: [
      // we specify a custom UglifyJsPlugin here to get source maps in production
      new UglifyJsPlugin({
        cache: true,
        parallel: true,
        uglifyOptions: {
          compress: false,
          ecma: 6,
          mangle: true
        },
        sourceMap: true
      })
    ]
  },
  plugins
}