facebook/react — pull request #289 by jordwalke (2013-08-23 09:23:48+00:00)
Title: Server rendering: rendering of entire document using React.

Summary: Allows rendering of React into the "document" as opposed to into a
particular node. To recap some basics:

document: One level above the tag - like the browser.
document.documentElement:

To support full-page server side rendering, we need to be able to render
*everything* including the HTML/BODY tags. This allows that.