103 Early Hints
Sent ahead of the final response with Link headers, so the browser can preload or preconnect while the server is still working.
- Class
- 1xx Informational. An interim response, sent before the final one.
- Registered
- Yes, in the IANA HTTP status code registry.
- References
- RFC 8297 ยง2 · MDN
Example response
HTTP/1.1 103 Early Hints Link: </style.css>; rel=preload; as=style