How to fix require.ensure error Webpack, Babel6, React?

Question

I trying to use require.ensure to create a chunk for Facility.js

import React, { Component } from 'react';
import { render } from 'react-dom';
class Facility extends Component {
    constructor(...args) {
        super(...args);
        this.state = {
              ....
        };
    }
    render() {
        return (
            <div>
                      ....
            </div>
        );
    }
}

export default Facility;
//Tried module.exports = Facility;

NonPatientSer.js

var Facility;
require.ensure([], function(require) { Facility = require('./Facility'); }, 'facility');

Dev I can see facility.bundle.js in my sources but the call for it returns undefined and this errors

Warning: React.createElement: type should not be null, undefined, boolean, or number. It should be a string (for DOM elements) or a ReactClass (for composite components). Check the render method of NonPatientSer

and

Uncaught Invariant Violation: Element type is invalid: expected a string (for built-in components) or a class/function (for composite components) but got: undefined. Check the render method of NonPatientSer .

Production (run build)

Not allowed to load local resource: file:///C:/Users/.../facility.bundle.js

Webpack config

output: {
    path: path.join(__dirname, 'dist'),
    filename: 'bundle.js',
    publicPath:  __dirname + '/',
    chunkFilename: '[name].bundle.js'
  },

Answer 1

First, you need to fix publicPath property in your webpack.config. You should use:

publicPath:  '/dist/'

instead absolute path.

At second, if you use es6 syntax for export module:

export default Facility;

you should write your import code like this:

require.ensure([], function(require) {
  Facility = require('./Facility').default;
  ReactDOM.render(<Facility/>, document.getElementById('app'));
}, 'facility');

Or just to use commonjs syntax:

module.exports = Facility;

and then

require.ensure([], function(require) {
  Facility = require('./Facility');
  ReactDOM.render(<Facility/>, document.getElementById('app'));
}, 'facility');

See also: http://www.2ality.com/2015/12/babel-commonjs.html

Update: You can set publicPath in your entry js file. For example:

entry.js

__webpack_public_path__ = '/publicPathToChunk/';

var chunk;
require.ensure([], function(require) { 
  chunk = require('./chunk'); 
}, 'chunk');

Also, you can use next trick:

var bundleSrc = document.querySelector('[src*="bundle"]').getAttribute("src");
__webpack_public_path__ = bundleSrc.substr(0, bundleSrc.lastIndexOf("/") + 1);