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Understanding the Node.js Event Loop

Node.js Event Loop

Deep dive into the core of Node.js — the Event Loop.

What is the Event Loop?

Node.js is a single-threaded runtime that handles async I/O.

const fs = require('fs');

console.log('Start');

fs.readFile('file.txt', (err, data) => {
  console.log('File read complete');
});

console.log('End');
// Output: Start → End → File read complete