Demo website unusable

[hisuwh]

This is a cool project and seems to work quite well but your demo website is completely unusable and very nearly put us off using this as it looks like the drag and drop doesn't work.

Seems to be chewing up resources like crazy:

[sashamilenkovic]

@hisuwh Yes, I have also noticed these performance issues. Has to do with the way we are rendering typings. Definitely worth taking a look at improving.