CipherChaCha20Poly1305.flatMap method | Node.js crypto module | Bun

This method returns a new stream by applying the given callback to each chunk of the stream and then flattening the result.

It is possible to return a stream or another iterable or async iterable from fn and the result streams will be merged (flattened) into the returned stream.

a function to map over every chunk in the stream. May be async. May be a stream or generator.

a stream flat-mapped with the function fn.