https://tutorialzine.com/2014/06/10-tips-for-writing-javascript-without-jquery
https://developer.mozilla.org/en-US/docs/Web/API/WebRTC_API
https://github.com/webrtc/adapter/
https://tutorialzine.com/2014/06/10-tips-for-writing-javascript-without-jquery
https://developer.mozilla.org/en-US/docs/Web/API/WebRTC_API
https://github.com/webrtc/adapter/