unp
const SIGNAL_TYPE_JOIN = "join"; const SIGNAL_TYPE_RESP_JOIN = "resp-join"; const SIGNAL_TYPE_LEAVE = "leave"; const SIGNAL_TYPE_NEW_PEER = "new-peer"; const SIGNAL_TYPE_PEER_LEAVE = "peer-leave"; const SIGNAL_TYPE_OFFER = "offer"; const SIGNAL_TYPE_ANSWER = "answer"; const SIGNAL_TYPE_CANDIDATE = "candidate";