https://developer.mozilla.org/en-US/docs/Web/API/ReadableStreamDefaultReader
ReadableStreamDefaultReader - Web APIs | MDN
The ReadableStreamDefaultReader interface of the Streams API represents a default reader that can be used to read stream data supplied from a network (such as...
web apisreadablestreamdefaultreadermdn
https://developers.cloudflare.com/workers/runtime-apis/streams/readablestreamdefaultreader/
ReadableStreamDefaultReader ยท Cloudflare Workers docs
Use ReadableStreamDefaultReader in Workers to read chunks from a ReadableStream.
cloudflare workersreadablestreamdefaultreaderdocs