indicates which headers will be used in the actual request as part of the preflight request
Quick facts
Description
indicates which headers will be used in the actual request as part of the preflight request
Syntax
Access-Control-Request-Headers: content-type
Related methods
Frequently asked questions
indicates which headers will be used in the actual request as part of the preflight request
It is classified as a request header and can appear in requests or responses depending on context.
Sources & standards
Updated 2026-08-18
Explore this reference