Webpack 2: react + code splitting, to be used via "webpack --progress --watch"

webpack.config.js

var path = require('path');
var webpack = require('webpack');

module.exports = {
  devtool: 'source-map',
  entry: {
    graph: './src/graph.js',
    vendor: ['react', 'react-dom'],
  },
  output: {
    filename: '[name].js',
    path: path.resolve(__dirname, 'dist')
  },
  module: {
    rules: [
      { test: /\.js$/, exclude: /node_modules/, loader: 'babel-loader' },
    ]
  },
  plugins: [
    new webpack.optimize.CommonsChunkPlugin({
      name: 'vendor'
    })
  ]
};