webpack.config.js

const path = require('path');
const HtmlWebpackPlugin = require('html-webpack-plugin');
const HtmlWebpackPluginConfig = new HtmlWebpackPlugin({
  template: __dirname + '/src/index.html',
  filename: 'index.html',
  inject: 'body'
});

const ExtractTextPlugin = require("extract-text-webpack-plugin");
const extractSass = new ExtractTextPlugin({
    filename: "bundle.css",
    disable: process.env.NODE_ENV === "development"
});

module.exports = {
  entry: __dirname + '/src/app.js',
  output: {
    path: path.resolve('dist'),
    filename: 'index_bundle.js',
    publicPath: '/'
  },
  resolve: {
    modules: [
      path.resolve('./src'),
      path.resolve('./node_modules')
    ]
  },
  devServer: {
    historyApiFallback: true
  },
  devtool: 'source-map',
  module: {
    loaders: [
      { test: /\.js$/, loader: 'babel-loader', exclude: /node_modules/ },
      { test: /\.jsx$/, loader: 'babel-loader', exclude: /node_modules/ },
      {
            test: /\.(scss|css)$/,
            use: extractSass.extract({
                use: [{
                    loader: "css-loader"
                }, {
                    loader: "sass-loader"
                }],
                // use style-loader in development
                fallback: "style-loader"
            })
      },
      { test: /\.(png|jpg)$/, loader: 'url-loader?limit=8192'}
    ]
  },
  plugins: [HtmlWebpackPluginConfig, extractSass]
}