This is actually really cool, and I'd be interested in performance of this versus something like jQuery. That said, this is really only for really modern browse

This is actually really cool, and I'd be interested in performance of this versus something like jQuery. That said, this is really only for really modern browsers as it uses a proxy which can't be polyfilled. For smaller projects that aren't as worried about browser compatibility, it seems like a great tool that allows for very expressive code (you can access dom['a.button'] to get all of the a.button tags in the dom, for example, or dom.a for all of the a tags).