destination

Request: Destination.

Describes the destination or use profile for the fetched data in a given fetch request/response cycle.

From MDN: "The destination read-only property of the Request interface returns a string describing the type of content being requested. The string must be one of the following values: audio, audioworklet, document, embed, font, frame, iframe, image, manifest, object, paintworklet, report, script, sharedworker, style, track, video, worker or xslt strings, or the empty string, which is the default value."

See also: MDN, Request.destination.