Errors

{
  "type": "https://staystryk.com/developers/errors#validation_failed",
  "title": "Validation failed",
  "status": 422,
  "detail": "The request contains invalid fields.",
  "instance": "/api/partner/v1/bookings",
  "code": "validation_failed",
  "requestId": "e1d2c3b4-a596-4877-8695-a4b3c2d1e0f9",
  "errors": [
    { "field": "checkOut", "message": "must be after checkIn" },
    { "field": "guest.email", "message": "must be a valid email address" }
  ]
}

const response = await fetch(url, options);
if (!response.ok) {
  const isProblem = response.headers.get('Content-Type')?.includes('application/problem+json');
  const problem = isProblem ? await response.json() : { code: 'internal_error', status: response.status };
  // Branch on problem.code, it is stable. title and detail are for humans and may change.
  console.error(problem.code, problem.detail, 'request', problem.requestId ?? response.headers.get('X-Request-Id'));
}