ReadonlybodyReadonlybodyReadonlycacheThe cache read-only property of the Request interface contains the cache mode of the request. It controls how the request will interact with the browser's HTTP cache.
ReadonlycredentialsThe credentials read-only property of the Request interface reflects the value given to the Request() constructor in the credentials option. It determines whether or not the browser sends credentials with the request, as well as whether any Set-Cookie response headers are respected.
ReadonlydestinationThe destination read-only property of the Request interface returns a string describing the type of content being requested.
ReadonlyheadersThe headers read-only property of the Request interface contains the Headers object associated with the request.
ReadonlyintegrityThe integrity read-only property of the Request interface contains the subresource integrity value of the request.
ReadonlykeepaliveThe keepalive read-only property of the Request interface contains the request's keepalive setting (true or false), which indicates whether the browser will keep the associated request alive if the page that initiated it is unloaded before the request is complete.
ReadonlymethodThe method read-only property of the Request interface contains the request's method (GET, POST, etc.)
ReadonlymodeThe mode read-only property of the Request interface contains the mode of the request (e.g., cors, no-cors, same-origin, or navigate.) This is used to determine if cross-origin requests lead to valid responses, and which properties of the response are readable.
ReadonlyredirectThe redirect read-only property of the Request interface contains the mode for how redirects are handled.
ReadonlyreferrerThe referrer read-only property of the Request interface is set by the user agent to be the referrer of the Request. (e.g., client, no-referrer, or a URL.)
ReadonlyreferrerThe referrerPolicy read-only property of the Request interface returns the referrer policy, which governs what referrer information, sent in the Referer header, should be included with the request.
ReadonlysignalThe read-only signal property of the Request interface returns the AbortSignal associated with the request.
ReadonlyurlThe url read-only property of the Request interface contains the URL of the request.
Extends the native Request class to be more flexible.
Also firefox Web Workers remove the request body though weirdly the main thread doesn't.