webpack.config.js

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

const BUILD_DIR = 'build'

module.exports = {
    entry: './scripts/webpack_loader.js',
    output: {
        path: BUILD_DIR + '/scripts',
        filename: "bundle.js"
    },
    devtool: "inline-source-map", // or "source-map"
    module: {
        loaders: [
          {
            test: /\.css$/, include: /styles/, loader:
              ExtractTextPlugin.extract("style!css") },
          {
            test: /\.scss$/, include: /styles/, loaders: ExtractTextPlugin.extract(
              "style-loader", "css-loader?sourceMap", "sass-loader?sourceMap")
          },
          {
              test: /\.js$/, include: /scripts/, loader: 'babel',
              query: {
                  presets: ['es2015', 'es2016']
              }
          }
      ],
      plugins: [
        new ExtractTextPlugin('*.css'),
        new CopyWebpackPlugin([ {from: 'index.html'} ])
      ]
    }
};