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What are “streams” in Node.js?

 What are “streams” in Node.js? Explain the different types of streams present in Node.js.


Asked On2019-06-17 13:27:04 by:gokilapriya

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Node.js streams have a reputation for being hard to work with, and even harder to understand. Well I’ve got good news for you — that’s no longer the case.

Over the years, developers created lots of packages out there with the sole purpose of making working with streams easier. But in this article, I’m going to focus on the native Node.js stream API.
What exactly are streams?
Streams are collections of data — just like arrays or strings. The difference is that streams might not be available all at once, and they don’t have to fit in memory. This makes streams really powerful when working with large amounts of data, or data that’s coming from an external source one chunk at a time.

However, streams are not only about working with big data. They also give us the power of composability in our code. Just like we can compose powerful linux commands by piping other smaller Linux commands, we can do exactly the same in Node with streams.


Answerd on:2019-07-02 Answerd By:avi738

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There are four fundamental stream types within Node.js:
  • Writable - streams to which data can be written (for example, fs.createWriteStream() ).
  • Readable - streams from which data can be read (for example, fs.createReadStream() ).
  • Duplex - streams that are both Readable and Writable (for example, net.Socket ).

Answerd on:2019-08-27 Answerd By:Annaliya

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