HTTP 505 — 505 HTTP Version Not Supported

// Express.js Server Response
app.get('/api/resource', (req, res) => {
  // Returning 505 505 HTTP Version Not Supported
  return res.status(505).json({
    error: '505 HTTP Version Not Supported',
    statusCode: 505,
    timestamp: new Date().toISOString()
  });
});

// Client-side fetch error check
const response = await fetch('/api/resource');
if (response.status === 505) {
  console.warn('Received HTTP 505 505 HTTP Version Not Supported');
}