This repo is a showcase of the new features available in EcmaScript 6 (Harmony). The demos use Traceur compiler so the scripts can run in any modern browser, no need to compile or anything...just open it in your browser and everything should work.
As part of my work on Webiny Platform (GitHub: http://github.com/Webiny/) I'm testing out the new features of EC6 and considering using some parts of it.