34. How to Create a Custom Readable Stream in Node.js | Complete Guide with Code

In this video, we’ll dive deep into building a custom Readable stream in Node.js using the Readable class. If you've already implemented custom Writable streams, this will feel familiar—but with a few key differences.

We’ll walk through:

Setting up a custom Readable class

Understanding read() and push()

Managing the internal buffer

Handling end of stream and errors

Comparing with built-in fs.createReadStream

Optimizing with Buffer.subarray()

By the end of this video, you’ll have a solid understanding of how to build your own readable stream logic—great for educational use, experimentation, or custom processing flows!

📂 Source code includes:

File reading via custom Readable

End-of-stream signaling with push(null)

Construct and destroy methods explained

🛑 Reminder: This is for educational purposes. Use built-in fs.createReadStream() in production unless you really need custom behavior.

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