let connected = false;
let socket;
onmessage = async (event) => {
  if (!connected) {
    socket = new WebSocket(`wss://${event.data.host}/ws`);
    socket.binaryType = 'arraybuffer';
    await new Promise((resolve) => {
      socket.onopen = resolve;
    });
    socket.onmessage = (event) => {
      postMessage(event.data);
    };
    connected = true;
    return;
  }
  socket.send(event.data);
};