A demo of WebRTC Data Channel using postMessage for a signalling channel.

I made this because I was frustrated with the lack of good WebRTC data channel examples and tutorials online. Most use the JavaScript context of the browser tab as a signalling channel which I did not like.

I have implemented two modes of work explained below.

In this demo, the offerer and answerer roles and implemented in separate files. This means the implementation is not versatile, but it is much easier to follow.

In this demo, each peer is capable of being either an offerer or an answerer. The flows for both are intertwined. Less clear but more real-life.

This will enable one peer can hold multiple connections in a group chat.