webrtcanswer.js

// Create Bobs WebRTC Peer. (same as Alice)
// ...
//Set Alice's description as the remote
bob.setRemoteDescription(new RTCSessionDescription(data)) // 'data' is the session description from Alice
	.then(function(){
		//Create answer
		bob.createAnswer({ offerToRecieveAudio: 1, offerToReceiveVideo: 1 })
			.then(function(description){
				
				// Bob saves his description locally
				bob.setLocalDescription(new RTCSessionDescription(description));
			
				// Send this description to Alice. This action is seen as acceptance of the call from Alice.
				// ...
			});
	});