newtriks/generator-react-webpack — pull request #17 by ryan953 (2014-07-06 03:42:23+00:00)
Title: Export `window.React` so that the react-devtools can find it.

The chrome tools first looks to see if `React` is defined globally, then if it's available via a call to `require()`. See https://github.com/facebook/react-devtools/blob/master/injected/ReactHost.js#L42-L48