Section 10.1 (Simple Peer-to-peer Example) should explicitly handle "answer" type

[a2sheppy]

The sample, while functionally correct, doesn't actually look for the type "answer" on the SDP; instead, it assumes that anything that's not an "offer" is an "answer". While this may or may not be true in the context of this specific example, it makes the example unclear -- it took me a while, I'm afraid, to realize that these two lines were in fact handling the "answer":

        } else
            pc.setRemoteDescription(desc).catch(logError);

I propose changing this to:

        } else if (desc.type == "answer") {
            pc.setRemoteDescription(desc).catch(logError);
        } else {
            log("Unsupported SDP type. Your code may differ here.");
        }

This would make the example easier and faster to comprehend and actually makes the entire onmessage handler much more obvious.