HTTP 103 Early Hints vs 506 Variant Also Negotiates
HTTP 103 (Early Hints) is a 1xx Informational response, while 506 (Variant Also Negotiates) is a 5xx Server Error response. 103 indicates that used to return some response headers before the final HTTP message. Allows the browser to start preloading resources while the server prepares the response. In contrast, 506 means that the server has an internal configuration error: the chosen variant resource is configured to engage in content negotiation itself.
Description
Used to return some response headers before the final HTTP message. Allows the browser to start preloading resources while the server prepares the response.
When You See It
When a server wants the browser to start loading CSS/JS before the full response is ready.
How to Fix
No fix needed. This optimization helps speed up page loading.
Description
The server has an internal configuration error: the chosen variant resource is configured to engage in content negotiation itself.
When You See It
Rare. Indicates a misconfigured server-side content negotiation loop.
How to Fix
Fix the server's content negotiation configuration.
Key Differences
103 is a 1xx Informational response, while 506 is a 5xx Server Error response.
HTTP 103: Used to return some response headers before the final HTTP message. Allows the browser to start preloading resources while the server prepares the response.
HTTP 506: The server has an internal configuration error: the chosen variant resource is configured to engage in content negotiation itself.
You encounter 103 when when a server wants the browser to start loading CSS/JS before the full response is ready.
You encounter 506 when rare. Indicates a misconfigured server-side content negotiation loop.
When to Use Which
For 103 (Early Hints): No fix needed. This optimization helps speed up page loading. For 506 (Variant Also Negotiates): Fix the server's content negotiation configuration.