HTTP 103 Early Hints vs 422 Unprocessable Content
HTTP 103 (Early Hints) is a 1xx Informational response, while 422 (Unprocessable Content) is a 4xx Client 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, 422 means that the server understands the content type and syntax, but was unable to process the contained instructions. Common in API validation errors.
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.
Quand vous le voyez
When a server wants the browser to start loading CSS/JS before the full response is ready.
Comment résoudre
No fix needed. This optimization helps speed up page loading.
Description
The server understands the content type and syntax, but was unable to process the contained instructions. Common in API validation errors.
Quand vous le voyez
When form validation fails — correct syntax but invalid data (e.g., email format wrong, date in the past).
Comment résoudre
Check the response body for specific validation errors and correct the input data.
Différences clés
103 is a 1xx Informational response, while 422 is a 4xx Client 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 422: The server understands the content type and syntax, but was unable to process the contained instructions. Common in API validation errors.
You encounter 103 when when a server wants the browser to start loading CSS/JS before the full response is ready.
You encounter 422 when when form validation fails — correct syntax but invalid data (e.g., email format wrong, date in the past).
Quand utiliser lequel
For 103 (Early Hints): No fix needed. This optimization helps speed up page loading. For 422 (Unprocessable Content): Check the response body for specific validation errors and correct the input data.