webpack.config.js

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

module.exports = {
  devServer: {
    historyApiFallback: true,
    hot: true,
    inline: true,
    progress: true,
    contentBase: './app',
    port: 8080
  },
  entry: [
    'webpack/hot/dev-server',
    'webpack-dev-server/client?http://localhost:8080',
    path.resolve(__dirname, 'app/index.js')
  ],
  output: {
    path: __dirname + '/build',
    publicPath: '/',
    filename: './bundle.js'
  },
  module: {
    loaders:[
      { test: /\.css$/, include: path.resolve(__dirname, 'app'), loader: 'style!css' },
      { test: /\.scss$/, loader: ExtractTextPlugin.extract("style-loader", "css-loader!sass-loader?outputStyle=compressed")},
      { test: /\.js[x]?$/, include: path.resolve(__dirname, 'app'), exclude: /node_modules/, loader: 'babel-loader' },
      { test: /\.(png|jpg)$/, include: path.resolve(__dirname, 'app'), loader: 'url?limit=25000'},
      { test: /\.(ttf|eot|svg|woff(2)?)(\?[a-z0-9]+)?$/, include: path.resolve(__dirname, 'app'), loader: 'url?limit=100000'}
    ]
  },
  resolve: {
    extensions: ['', '.js', '.jsx'],
  },
  plugins: [
    new webpack.HotModuleReplacementPlugin(),
    new ExtractTextPlugin('app.css')
  ]
};