ReadonlylockedThe locked read-only property of the ReadableStream interface returns whether or not the readable stream is locked to a reader.
The cancel() method of the ReadableStream interface returns a Promise that resolves when the stream is canceled.
Optionalreason: anyThe getReader() method of the ReadableStream interface creates a reader and locks the stream to it.
Optionaloptions: ReadableStreamGetReaderOptionsThe pipeThrough() method of the ReadableStream interface provides a chainable way of piping the current stream through a transform stream or any other writable/readable pair.
Optionaloptions: StreamPipeOptionsThe pipeTo() method of the ReadableStream interface pipes the current ReadableStream to a given WritableStream and returns a Promise that fulfills when the piping process completes successfully, or rejects if any errors were encountered.
Optionaloptions: StreamPipeOptionsThe tee() method of the two-element array containing the two resulting branches as new ReadableStream instances.
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ReadableStreaminterface of the Streams API represents a readable stream of byte data.MDN Reference