How can I use streams to transform data in Node.js?

How can I use streams to transform data in Node.js?

You can use the stream.Transform class in Node.js to create a transform stream that modifies data as it is read.

Can you give me an example of a transform stream?

Sure! Here's a simple example:

const { Transform } = require('stream');

const transformStream = new Transform({
  transform(chunk, encoding, callback) {
    const transformedChunk = chunk.toString().toUpperCase();
    callback(null, transformedChunk);
  }
});

process.stdin.pipe(transformStream).pipe(process.stdout);

What does this example do?

This example reads data from standard input, transforms it to uppercase, and then writes it to standard output.

Can I use multiple transform streams in a pipeline?

Yes, you can chain multiple transform streams together in a pipeline to perform complex data transformations.