webpackJsonp is not defined: webpack-dev-server and CommonsChunkPlugin

Question

This is my webpack.config.js file:

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

module.exports = {
  cache: true,
  devtool: 'source-map',
  entry: {
    app : [
      './src/index.js'
    ],
    vendor: ['lodash']
  },
  output: {
    filename: 'bundle.js',
    path: path.join(__dirname, 'dist'),
    publicPath: '/dist/',
    pathinfo: true
  },
  module: {
    loaders: [
      { test: /\.js$/, exclude: /node_modules/, loaders: ['babel'] },
      { test: /\.scss/, exclude: /node_modules/, loaders: ['style', 'css', 'sass'] }
    ]
  },
  plugins: [
    new webpack.NoErrorsPlugin(),
    new webpack.optimize.CommonsChunkPlugin('vendor', 'vendor.bundle.js', Infinity)
  ]
};

And this is my scripts that runs the webpack-dev-server:

const webpack =require('webpack');
const WebpackDevServer = require('webpack-dev-server');
const webpackConfig = require('../webpack.config');
const _  = require('lodash');

const webpackDevConfig = _.cloneDeep(webpackConfig);
const devPort = 3000;

webpackDevConfig.entry.app.unshift('webpack/hot/dev-server');
webpackDevConfig.entry.app.unshift('webpack-dev-server/client?http://localhost:' + devPort + '/');
webpackDevConfig.plugins.push(new webpack.HotModuleReplacementPlugin());

new WebpackDevServer(webpack(webpackDevConfig), {
  publicPath: webpackConfig.output.publicPath,
  hot: true,
  stats: {
    colors: true,
    chunks: false
  }
}).listen(devPort, 'localhost');

The webpack command output is good (bundle.js and vendor.bundle.js), however, the dev server fails with webpackJsonp is not defined (although its in-memory compilation succeeded).

When removing CommonsChunkPlugin from webpack.config.js - it all works fine:

...
entry: [
    './src/index.js'
  ],
...
plugins: [
    new webpack.NoErrorsPlugin()
  ]

Any ideas?

Answer 1

In your index.html file just call vendor.bundle.js before bundle.js

<script src="assets/js/vendor.bundle.js"></script>
<script src="assets/js/bundle.js"></script>

That's all, now it should work. More information.

Answer 2

Rename vendor entry point to

'vendor.js': ['lodash']