webpack.config.js

'use strict';

const path = require('path');
const webpack = require('webpack');

const env = process.env.NODE_ENV || 'development';
const isProduction = (env === 'production');

let plugins = [
  new webpack.optimize.OccurenceOrderPlugin(),
  new webpack.optimize.DedupePlugin(),
  new webpack.NoErrorsPlugin()
];

if (isProduction) {
  plugins.push(
    new webpack.optimize.UglifyJsPlugin({
      compress: {
        drop_console: true,
        unsafe: true
      }
    })
  );
}

module.exports = {
  devtool: isProduction ? 'cheap-source-map' : 'eval',
  entry: './src/index.js',
  output: {
    path: path.join(__dirname, 'dist'),
    filename: 'bundle.js',
    libraryTarget: 'var',
    library: 'EventEmitter'
  },
  resolve: {
    root: path.join(__dirname, 'dist')
  },
  plugins,
  module: {
    preLoaders: [
      {
        test: /\.js$/,
        include: path.join(__dirname, 'src'),
        loader: 'eslint-loader'
      }
    ],
    loaders: [
      {
        test: /\.js$/,
        include: path.join(__dirname, 'src'),
        loaders: ['babel']
      }
    ]
  }
};