webpack.config.js

/* global __dirname, require, module*/

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

let
  libraryName = 'PubSub',
  plugins     = [],
  outputFile;

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

const
  config = {
    entry   : __dirname + '/src/index.js',
    devtool : 'source-map',
    output  : {
      path           : __dirname + '/lib',
      filename       : outputFile,
      library        : libraryName,
      libraryTarget  : 'umd',
      umdNamedDefine : true
    },
    module: {
      rules: [
        {
          test    : /(\.jsx|\.js)$/,
          loader  : 'babel-loader',
          exclude : /(node_modules|bower_components)/
        },
        {
          test    : /(\.jsx|\.js)$/,
          loader  : 'eslint-loader',
          exclude : /node_modules/
        }
      ]
    },
    resolve: {
      modules    : [path.resolve('./node_modules'), path.resolve('./src')],
      extensions : ['.json', '.js']
    },
    plugins: plugins
  };

module.exports = config;