webpack.config.js

var webpack = require('webpack')
var ExtractTextPlugin = require('extract-text-webpack-plugin')
var path = require('path');
var libName = 'Mu'

var outputFile = libName + '.js';

const extractSass = new ExtractTextPlugin({
  filename: "Mu.css",
  disable: process.env.NODE_ENV === "development"
});

var config = {
  entry: __dirname + '/src/index.js',
  devtool: 'source-map',
  output: {
    path: __dirname + '/lib',
    filename: outputFile,
    library: libName,
    libraryTarget: 'umd',
    umdNamedDefine: true
  },
  plugins: [
    new webpack.optimize.UglifyJsPlugin({
      compress: {
        warnings: false
      },
      sourceMap: true
    }),
    extractSass,
  ],
  module: {
    loaders: [{
        test: /(\.jsx|\.js)$/,
        loader: 'babel-loader',
        exclude: /(node_modules|bower_components)/
      },
      {
        test: /(\.jsx|\.js)$/,
        loader: "eslint-loader",
        exclude: /node_modules/
      },
      {
        test: /\.scss$/,
        use: extractSass.extract({
          use: [{
            loader: "css-loader"
          }, {
            loader: "sass-loader"
          }],
          // use style-loader in development
          fallback: "style-loader"
        })
      }
    ],
  },
  resolve: {
    modules: [__dirname, 'node_modules'],
  }
};

module.exports = config;