Working with Streams in Node.js

What are Streams?

Streams are objects that let you read data from a source or write data to a destination in a continuous fashion. They are essential for handling large amounts of data efficiently.

Types of Streams

• Readable: Streams from which data can be read
• Writable: Streams to which data can be written
• Duplex: Streams that are both Readable and Writable
• Transform: Duplex streams that can modify data

Stream Events

// Readable stream events
readableStream.on('data', (chunk) => {
    console.log('Received chunk:', chunk);
});

readableStream.on('end', () => {
    console.log('Stream ended');
});

readableStream.on('error', (error) => {
    console.error('Stream error:', error);
});

Best Practices

• Use streams for large files
• Handle backpressure properly
• Use pipe() for simple stream connections
• Always handle stream errors

Conclusion

Streams are a powerful feature in Node.js for efficient data processing. Understanding streams is essential for building applications that handle large amounts of data without consuming excessive memory.