Piping Patterns: Forking Streams

We can perform a fork of a stream by piping a single Readable stream into multiple Writable streams. This is useful when we want to send the same data to different destinations; for example, two different sockets or two different files. It can also be used when we want to perform different transformations on the same data, or when we want to split the data based on some criteria. If you’re familiar with the Unix command tee this is exactly the same concept applied to Node.js streams.

The illustration given below gives us a graphical representation of this pattern.