This is the React boilerplate code published at React Getting Started Docs as of August 13, 2016.
Built with blockbuilder.org
https://npmcdn.com/react@15.3.0/dist/react.min.js
https://npmcdn.com/react-dom@15.3.0/dist/react-dom.min.js
https://npmcdn.com/babel-core@5.8.38/browser.min.js