OptionalcacheA string indicating how the request will interact with the browser's cache to set request's cache.
OptionalcredentialsA 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.
OptionalintegrityA cryptographic hash of the resource to be fetched by request.
Sets request's integrity.
OptionalkeepaliveA boolean to set request's keepalive.
OptionalmodeA string to indicate whether the request will use CORS, or will be restricted to same-origin URLs.
Sets request's mode.
OptionalredirectA 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.
OptionalreferrerA string whose value is a same-origin URL, "about:client", or the empty string, to set request's referrer.
OptionalreferrerA referrer policy to set request's referrerPolicy.
OptionalsignalAn AbortSignal to set request's signal.
Addiotional options for the
fetchfunction.Almost same with RequestInit type of the fetch function, but
body,headersandmethodproperties are omitted.The reason why defining duplicated definition of RequestInit is for legacy NodeJS environments, which does not have the fetch function type.