Function cleanup

frontend/src/react/components/monaco/lsp-client.ts:95–103

()

const useHeartbeat = (ws: WebSocket) => {
  const cleanup = () => {
    clearTimeout(conn.heartbeat.timer);
    conn.heartbeat = {
      timer: undefined,
      counter: 0,
      timestamp: 0,
    };
    emit();
  };

  ws.addEventListener("error", cleanup);
  ws.addEventListener("close", cleanup);