socket.on('receiveMessage',(data)=>print("data")) called twice

[jabonge]

socket = IO.io("myserverurl", <String, dynamic>{
'transports': ['websocket']
});
socket.nsp = "/chats";

    socket.on("receiveMessage", (data) {
      print("from socket $data");
             });
    socket.connect();
    socket.emit("join", {"Id": "id"});

i send message my server log message call twice why it is called twice?
server code
io.of('nsp').to('id').('receiveMessage',message);

[jabonge]

in Flutter i dont really know why log called twice i will wait answer thank you for your attention

[bastibense]

Came across the same issue. Apparently calling .connect() causes all event handlers to get registered/fired twice.

Try removing the connect() call, the socket should automatically connect.

[leonidl]

You can also add "'autoConnect': false" option to optional parameters list to stop socket from auto-connecting. In that case you will have to call connect() manually.

[bastibense]

Still, shouldn't this at least print out a warning to the log or just ignore a second call to connect()?

[jumperchen]

@bastibense I reopen it, and it looks like the behavior is not the same as JS version.