[dudus]

Wait, so isn't it server-less? What HTML5 features are in use here?

Do you just send the message to the server and back to the other client?

How is this different than chat rooms we had 10 years ago?

[abava]

It is server-based. Server-less version will be later as I wrote. Yes, it is like chat rooms, it is like client-server and it is like web. There is a web session actually :). We've tested a way for linking (pairing) two devices. From HTML5 there is File Reading API