Just like JavaScript has the event-driven programming technique for the browser side, Node.js has it on the server side. Events are used heavily in Node.js. Setting up the event is similar to the browser-side JavaScript: First, we need to listen to ...
Callback Hell Why do we even need Promise and Async-Await? They allow us to avoid the Callback Hell. When the number of nesting levels of functions increases, it becomes hard to read and manage the code. That pyramid code structure is what we refer t...
What is an Event Loop? By default, JS is designed to handle synchronous tasks only. Event Loop is a process by which Node.js handles asynchronous functions. Let's see a code example and see which line of code gets printed first: // Asynchronous Timer...
What is NPM? It is the world's largest JavaScript package library. It has command-line tools to install and manage the packages. Once, you install Node.js on your computer, 'npm' comes with it. NPM commands are as follows: npm install [Installs pack...
OS Module This module provides information about the operating system and computer specifications. // Importing built-in os module const os = require('os'); console.log(os.type()); // Tells base kernel of OS console.log(os.version()); ...
NodeJS It is a runtime environment to run JavaScript outside the browser. It allows JavaScript to be used on the server side and create awesome web apps. Even though we can still use JS functions like setInterval and setTimeout, we can't use browser ...
