peerjs/lib/adapter.js

var RTCPeerConnection = null;
var getUserMedia = null;
var attachMediaStream = null;
var browserisms = null;

if (navigator.mozGetUserMedia) {
  browserisms = 'Firefox'

  RTCPeerConnection = mozRTCPeerConnection;

  getUserMedia = navigator.mozGetUserMedia.bind(navigator);
  attachMediaStream = function(element, stream) {
    console.log("Attaching media stream");
    element.mozSrcObject = stream;
    element.play();
  };
} else if (navigator.webkitGetUserMedia) {
  browserisms = 'Webkit'

  RTCPeerConnection = webkitRTCPeerConnection;

  getUserMedia = navigator.webkitGetUserMedia.bind(navigator);
  attachMediaStream = function(element, stream) {
    element.src = webkitURL.createObjectURL(stream);
  };
}

exports.RTCPeerConnection = RTCPeerConnection;
exports.getUserMedia = getUserMedia;
exports.attachMediaStream = attachMediaStream;
exports.browserisms = browserisms;