webpack.config.js

const path = require('path');
const webpack = require('webpack');
const ExtractTextPlugin = require('extract-text-webpack-plugin');

const SRC_DIR = `${__dirname}/src`;
const DIST_DIR = `${__dirname}/dist`;

module.exports = {
  context: SRC_DIR,
  resolve: {
    extensions: ['.js', '.scss'],
  },

  entry: {
    'react-power-select': './index.js',
    css: './styles/index.js',
  },

  output: {
    path: `${DIST_DIR}/`,
    filename: '[name].js',
  },

  module: {
    rules: [
      {
        test: /\.js$/,
        exclude: /node_modules/,
        use: [
          {
            loader: 'babel-loader',
            options: {
              cacheDirectory: true,
              presets: ['es2015', 'react', 'stage-0'],
            },
          },
        ],
      },
      {
        test: /\.scss$/,
        use: ExtractTextPlugin.extract({
          fallback: 'style-loader',
          use: [
            {
              loader: 'css-loader',
              options: {
                minimize: true,
              },
            },
            {
              loader: 'sass-loader',
            },
          ],
        }),
      },
    ],
  },

  plugins: [
    new webpack.ProvidePlugin({
      React: 'react',
    }),

    new webpack.optimize.UglifyJsPlugin({
      compress: {
        warnings: false,
      },
      output: {
        comments: false,
      },
    }),

    new ExtractTextPlugin({
      filename: 'react-power-select.css',
    }),
  ],
};