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.
Additional options for the
fetchfunction.Almost same with RequestInit type of the fetch function, but
body,headersandmethodproperties are omitted.The explicit option record exposes the supported subset independently of changes to RequestInit. DOM types are still required by the connection's custom fetch and abort signal members.
Evidence
contracts/common.md#principled-implementation The record exposes a subset of RequestInit options while omitting body, headers and method, whose construction belongs to the route pipeline; AbortSignal and the connection's fetch member still depend on DOM declarations.
Evidence
contracts/common.md#clear-and-simple-design A flat option record, with each member mirroring one field of the standard request options.
Evidence
contracts/common.md#prohibited-implementation-shortcuts It is a type; the fetcher spreads the options into the request and then sets the method and headers itself.
Evidence
contracts/common.md#meaningful-documentation The comment explains the supported subset and remaining DOM type dependency, and each member documents the standard field's meaning.