W3cubDocs

/HTTP

Access-Control-Request-Method

The Access-Control-Request-Method request header is used when issuing a preflight request to let the server know which HTTP method will be used when the actual request is made. This header is necessary as the preflight request is always an OPTIONS and doesn't use the same method as the actual request.

Header type Request header
Forbidden header name yes

Syntax

Access-Control-Request-Method: <method>

Directives

<method>
One of the HTTP request methods, for example GET, POST, or DELETE.

Examples

Access-Control-Request-Method: POST

Specifications

Specification Status Comment
Fetch
The definition of 'Access-Control-Request-Method' in that specification.		 Living Standard Initial definition.

Browser compatibilityUpdate compatibility data on GitHub

Desktop
Chrome Edge Firefox Internet Explorer Opera Safari
Basic support 4 12 3.5 10 12 4
Mobile
Android webview Chrome for Android Edge Mobile Firefox for Android Opera for Android iOS Safari Samsung Internet
Basic support 2 Yes Yes 4 12 3.2 Yes

See also

Edit this page on MDN

© 2005–2018 Mozilla Developer Network and individual contributors.
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Access-Control-Request-Method