Access-Control-Request-Headers
The Access-Control-Request-Headers request header is used by browsers when issuing a preflight request to let the server know which HTTP headers the client might send when the actual request is made (such as with setRequestHeader()). The complementary server-side header of Access-Control-Allow-Headers will answer this browser-side header.
| Header type | Request header |
|---|---|
| Forbidden header name | yes |
Syntax
Access-Control-Request-Headers: <header-name>, <header-name>, …
Directives
- <header-name>
-
A comma-delimited list of HTTP headers that are included in the request.
Examples
Access-Control-Request-Headers: X-PINGOTHER, Content-Type
Specifications
| Specification |
|---|
| Fetch Standard # http-access-control-request-headers |
Browser compatibility
BCD tables only load in the browser