A little like this - Donatello, a "pure" CSS drawing library, http://news.ycombinator.com/item?id=3090290. Not to belittle the effort, but 335 (or even 1) lines of JS is absolutely NOT pure CSS3. It really bothers me when people do that. It wouldn't have been any less impressive with a more honest title.

That being said, this is a really cool demo.

It is pure CSS as explicitly defined on the page, i.e. no images used.

Just because you have a different definition doesn’t make it right.

It's not his definition. Pure means "Not mixed or adulterated with any other substance or material". Here there is JS mixed, hence it isn't pure.

You can make your point without resorting to insults. I was pointing that it can set the wrong expectation, as I understood it, having seen things such as the game disussed on http://news.ycombinator.com/item?id=2582457, which is in fact CSS only. Like I said, I think it's is an awesome demo. Out.

I understand what you're saying. I don't agree with it.

Not that I have any problem with it being pure or not, just with your reply to okal.

It’s not. It’s pure CSS as defined explicitly on the page, i.e. no images used.

that's obviously needed for the "slide to unlock" gesture and other interactive components...