A BodyInit object or null to set request's body.

A string indicating how the request will interact with the browser's cache to set request's cache.

A string indicating whether credentials will be sent with the request always, never, or only when sent to a same-origin URL. Sets request's credentials.

A Headers object, an object literal, or an array of two-item arrays to set request's headers.

A cryptographic hash of the resource to be fetched by request. Sets request's integrity.

A boolean to set request's keepalive.

A string to set request's method.

A string to indicate whether the request will use CORS, or will be restricted to same-origin URLs. Sets request's mode.

A string indicating whether request follows redirects, results in an error upon encountering a redirect, or returns the redirect (in an opaque fashion). Sets request's redirect.

A string whose value is a same-origin URL, "about:client", or the empty string, to set request's referrer.

A referrer policy to set request's referrerPolicy.

An AbortSignal to set request's signal.

Can only be null. Used to disassociate request from any Window.