A TextStreamReader instance can be used as an AsyncIterator that returns the entire string that has been received up to the current point in time.
Optional
totalChunkCount: numberOptional
onprogress of the stream between 0 and 1. Undefined for streams of unknown size
Async iterator implementation to allow usage of for await...of
syntax.
Yields structured chunks from the stream.
A class to read chunks from a ReadableStream and provide them in a structured format.