Jak poslat binary frame cez websocket

var connection = new WebSocket('wss://moj_web.sk:1234');

      $("body").mousemove(function( event ) {
       
        var data = {
          name: "lol",
          pos: [event.pageX, event.pageY]
        };
        
        //convert to binary frame
        var data2 = new Uint16Array(data);
        console.log(data2); // []

       connection.send(data2); // Binary Frame (Opcode 2, mask) | length: 0

      });

connection.on('message', function(message) {
    for (var i = players.length - 1; i >= 0; i--) {
        players[i].connection.send(message.binaryData);
    }
});