webpack.config.babel.js

import webpack from 'webpack';
import path from 'path';
import WebpackStatsPlugin from 'stats-webpack-plugin';

const env = process.env.NODE_ENV;
const generateStats = process.env.WEBPACK_STATS || false;
const libraryName = `react-injectables`;
const outputFileName = `${libraryName}.js`;
const reactExternal = {
  root: `React`,
  commonjs2: `react`,
  commonjs: `react`,
  amd: `react`
};

const config = {
  entry: path.resolve(__dirname, `./src/index.js`),
  externals: {
    react: reactExternal
  },
  module: {
    preLoaders: [
      { test: /\.js$/, loaders: [`eslint-loader`], exclude: /node_modules/ }
    ],
    loaders: [
      {
        test: /\.js$/,
        loaders: [`babel-loader`],
        include: [path.resolve(__dirname, `./src`)],
        exclude: /node_modules/
      }
    ]
  },
  output: {
    path: path.resolve(__dirname, `./lib`),
    filename: outputFileName,
    library: libraryName,
    libraryTarget: `umd`,
    umdNamedDefine: true
  },
  plugins: [
    new webpack.optimize.OccurenceOrderPlugin(),
    new webpack.optimize.DedupePlugin(),
    new webpack.DefinePlugin({
      'process.env.NODE_ENV': JSON.stringify(env)
    })
  ],
  eslint: {
    failOnError: true,
    failOnWarning: true
  }
};

if (env === `production`) {
  config.plugins.push(
    new webpack.optimize.UglifyJsPlugin({
      compressor: {
        pure_getters: true,
        unsafe: true,
        unsafe_comps: true,
        screw_ie8: true,
        warnings: false
      }
    })
  );
}

if (generateStats) {
  config.plugins.push(
    new WebpackStatsPlugin(`stats.json`, {
      chunkModules: true,
      exclude: [/node_modules[\\\/]react/]
    })
  );
}

export default config;