How does streams API work internally in JavaScript?

The Streams API in JavaScript is a powerful feature that allows you to work with data streams that can be processed incrementally. It is particularly useful for handling large data sets and real-time data processing. The Streams API provides a way to read and write data as it is being transmitted, without needing to load the entire data set into memory. This is accomplished through a combination of readable and writable streams.

Internally, the Streams API utilizes several key components:

Readable Streams: These allow you to read data from a source. Data is fetched in small chunks, which enables efficient memory usage.
Writable Streams: These allow you to write data to a destination. You write data in chunks as well, which means you can start processing the data before the entire write operation is complete.
Duplex Streams: These streams can read and write, providing a two-way flow of data.
Transform Streams: These are duplex streams that can modify or transform the data as it is written or read.

Here's a simple example of how you might use the Streams API to read from a readable stream and write to a writable stream:


    const { Readable, Writable } = require('stream');

    const readableStream = new Readable({
        read(size) {
            // Implement the logic to push data into the stream
            this.push('Some data chunk');
            this.push(null); // No more data
        }
    });

    const writableStream = new Writable({
        write(chunk, encoding, callback) {
            console.log(`Writing: ${chunk}`);
            callback(); // Signal that the chunk is processed
        }
    });

    readableStream.pipe(writableStream); // Pipe data from readable to writable

How does streams API work internally in JavaScript?

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How does streams API work internally in JavaScript?

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