webpack.config.js

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

const config = {
  entry: __dirname + '/js/index.jsx',
  output: {
    path: __dirname + '/dist',
    filename: 'bundle.js'
  },
  resolve: {
    extensions: [".js", ".jsx", ".css"]
  },
  module: {
    rules: [
      {
        test: /\.jsx?/,
        exclude: /node_modules/,
        use: 'babel-loader'
      }, {
        test: /\.css$/,
        use: ExtractTextPlugin.extract({fallback: 'style-loader', use: 'css-loader'})
      }, {
        test: /\.(png|svg|jpg|gif)$/,
        use: 'file-loader'
      }, {
        test: /\.scss$/,
        loaders: ["style", "css", "sass"]
      }
    ]
  },
  plugins: [new ExtractTextPlugin('styles.css')]
};

module.exports = config;