How can I catch client error event? about express HOT 1 OPEN

// Middleware to handle timeouts
app.use((req, res, next) => {
  req.setTimeout(5000, () => {
    const error = new Error('Request Timeout');
    error.status = 408; // Request Timeout
    next(error);
  });
  next();
});

// Your test route
app.post('/test', async (req: Request, res: Response) => {
  // Simulating delay
  await sleep(6000);
  res.status(200).send();
});

// Error handling middleware
app.use((err, req, res, next) => {
  if (res.headersSent) {
    return next(err);
  }

  logger.error('Request Error:', err);
  res.status(err.status || 500).json({ error: err.message });
});