JavaScript Academy · Lesson

Sending and Receiving Messages

Exchange data with send and onmessage.

Sending Text

Once open, socket.send(string) transmits a text message to the server.

socket.onopen = () => {
  socket.send("ping");
};

onmessage fires for every incoming frame. The data is on event.data.

socket.onmessage = (event) => {
  console.log("Received:", event.data);
};