how to know... about webrtc-experiment

[muaz-khan]

1) if the distant user is using a media communication (audio, video)

Nowadays, without making getUserMedia request; we can't detect camera presence. It will be possible soon. You can use session object to detect target session:

connection.onstream = function (stream) {
    if (stream.session === Session.AudioVideo) {}

    // to check if audio-only session
    if (stream.session.isAudio()) {}

    // to check screen
    if (stream.session === Session.Screen || stream.session === Session.ScreenData) {}
}

To see list of other sessions.

2) the user id attached to stream

This feature is not implemented yet.

3) if the distant user is connected or disconnected and cut the connection with a specific user?

If you meant data channel connection; there are onopen and onclose methods.

If possible; please make a feature request for all things you want to be added in RTCMultiConnection.js library.