HTTP Status Codes in TypeScript

TypeScript's enum feature provides an elegant way to manage HTTP status codes, making your code more maintainable and type-safe.

The HTTP Status Code Enum

export enum HttpStatusCode { 
  // 1xx Informational 
  CONTINUE = 100, 
  SWITCHING_PROTOCOLS = 101, 
  PROCESSING = 102, 
  // 2xx Success 
  OK = 200, 
  CREATED = 201, 
  ACCEPTED = 202, 
  NON_AUTHORITATIVE_INFORMATION = 203, 
  NO_CONTENT = 204, 
  RESET_CONTENT = 205, 
  PARTIAL_CONTENT = 206, 
  MULTI_STATUS = 207, 
  ALREADY_REPORTED = 208, 
  IM_USED = 226, 
  // 3xx Redirection 
  MULTIPLE_CHOICES = 300, 
  MOVED_PERMANENTLY = 301, 
  FOUND = 302, 
  SEE_OTHER = 303, 
  NOT_MODIFIED = 304, 
  USE_PROXY = 305,
  TEMPORARY_REDIRECT = 307, 
  PERMANENT_REDIRECT = 308, 
  // 4xx Client errors
  BAD_REQUEST = 400, 
  UNAUTHORIZED = 401, 
  PAYMENT_REQUIRED = 402, 
  FORBIDDEN = 403, 
  NOT_FOUND = 404, 
  METHOD_NOT_ALLOWED = 405, 
  NOT_ACCEPTABLE = 406, 
  PROXY_AUTHENTICATION_REQUIRED = 407, 
  REQUEST_TIMEOUT = 408, 
  CONFLICT = 409, 
  GONE = 410, 
  LENGTH_REQUIRED = 411, 
  PRECONDITION_FAILED = 412, 
  PAYLOAD_TOO_LARGE = 413, 
  URI_TOO_LONG = 414, 
  UNSUPPORTED_MEDIA_TYPE = 415, 
  RANGE_NOT_SATISFIABLE = 416, 
  EXPECTATION_FAILED = 417, 
  IM_A_TEAPOT = 418, 
  MISDIRECTED_REQUEST = 421, 
  UNPROCESSABLE_ENTITY = 422,
  LOCKED = 423, 
  FAILED_DEPENDENCY = 424, 
  UPGRADE_REQUIRED = 426, 
  PRECONDITION_REQUIRED = 428, 
  TOO_MANY_REQUESTS = 429, 
  REQUEST_HEADER_FIELDS_TOO_LARGE = 431, 
  UNAVAILABLE_FOR_LEGAL_REASONS = 451, 
  // 5xx Server errors 
  INTERNAL_SERVER_ERROR = 500, 
  NOT_IMPLEMENTED = 501, 
  BAD_GATEWAY = 502, 
  SERVICE_UNAVAILABLE = 503, 
  GATEWAY_TIMEOUT = 504, 
  HTTP_VERSION_NOT_SUPPORTED = 505, 
  VARIANT_ALSO_NEGOTIATES = 506, 
  INSUFFICIENT_STORAGE = 507, 
  LOOP_DETECTED = 508, 
  NOT_EXTENDED = 510, 
  NETWORK_AUTHENTICATION_REQUIRED = 511, 
}

Categories Overview

1xx: Informational

100 Continue
101 Switching Protocols
102 Processing

2xx: Success

200 OK
201 Created
202 Accepted
Additional success codes...

3xx: Redirection

300 Multiple Choices
301 Moved Permanently
302 Found
Other redirect codes...

4xx: Client Errors

400 Bad Request
401 Unauthorized
404 Not Found
More client errors...

5xx: Server Errors

500 Internal Server Error
502 Bad Gateway
503 Service Unavailable
Additional server errors...

Benefits of Using Enums

Type Safety
- Compile-time checking
- Autocompletion support
- Error prevention
Code Organization
- Logical grouping
- Easy reference
- Clear categorization
Maintainability
- Centralized definitions
- Easy updates
- Consistent usage

Best Practices

Use descriptive enum names
Group related status codes
Include relevant comments
Maintain standard naming
Consider backwards compatibility

TypeScript enums make working with HTTP status codes more reliable and developer-friendly.