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.
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 | Status | Comment |
---|---|---|
Fetch The definition of 'Access-Control-Request-Headers' in that specification. |
Living Standard | Initial definition. |
Browser compatibility
The compatibility table in this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.
Desktop | Mobile | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
Access-Control-Request-Headers | Chrome Full support 4 | Edge Full support 12 | Firefox Full support 3.5 | IE Full support 10 | Opera Full support 12 | Safari Full support 4 | WebView Android Full support 2 | Chrome Android Full support Yes | Firefox Android Full support 4 | Opera Android Full support 12 | Safari iOS Full support 3.2 | Samsung Internet Android Full support Yes |
Legend
- Full support
- Full support