Node.js Streams

Streams allow Node.js to read or write data piece by piece instead of loading an entire massive file into memory all at once. This is exactly how video streaming services like Netflix send movies to your browser without crashing your computer.

1/* this reads a stream */
2var fs = require('fs');
3var readerStream = fs.createReadStream('large_video.mp4');
4
5readerStream.on('data', function(chunk) {
6   console.log("Received a chunk of data");
7});