#js
Objects
Objects are how JavaScript organizes related data and behavior together. While arrays store ordered lists, objects store named properties — key-value pairs that let you model real-world things like users, products, or API responses. Almost everything in JavaScript is an object (or behaves like one), so understanding them deeply is essential. Creating Objects The most common way to create an object is with an object literal: const user = { name: "Alice", age: 28, email: "alice@example. Read more →
May 18, 2026
Loops
Loops let you repeat code without writing it over and over. Whether you’re processing every item in an array, waiting for a condition to change, or generating a sequence of values, loops are the tool for the job. JavaScript has several loop types, each suited to different situations. This tutorial covers all of them with practical examples. The for Loop The classic for loop gives you full control over initialization, condition, and increment: Read more →
May 18, 2026
Conditionals
Conditionals let your code make decisions. Instead of running every line top to bottom, you can branch — execute different code depending on whether something is true or false. This is fundamental to every program you’ll ever write. if Statements The simplest conditional: run code only if a condition is true. const temperature = 35; if (temperature > 30) { console.log("It's hot outside!"); } if…else Handle both cases: const age = 17; if (age >= 18) { console. Read more →
May 18, 2026
DOM Manipulation
The DOM (Document Object Model) is how JavaScript interacts with web pages. When a browser loads HTML, it creates a tree of objects representing every element on the page. JavaScript can read, modify, add, and remove these objects — which is how you make web pages interactive. This tutorial covers the essential DOM operations you’ll use constantly in frontend development. Selecting Elements Before you can change an element, you need to find it. Read more →
May 18, 2026
Promises
JavaScript is single-threaded — it can only do one thing at a time. But web applications need to fetch data from servers, read files, and wait for user input without freezing the page. Promises are how JavaScript handles these asynchronous operations: they represent a value that doesn’t exist yet but will (or won’t) in the future. The Problem Promises Solve Before promises, async code used callbacks. This worked for simple cases but quickly became unmanageable: Read more →
May 18, 2026
Async/Await
Async/await is syntactic sugar on top of Promises. It lets you write asynchronous code that reads like synchronous code — no more .then() chains. Under the hood, it’s still promises, but the code is dramatically easier to read and reason about. The Basics Mark a function as async, then use await inside it to pause until a promise resolves: async function getUser(id) { const response = await fetch(`/api/users/${id}`); const user = await response. Read more →
May 18, 2026
Functions
Functions are the building blocks of JavaScript programs. They let you wrap up a piece of logic, give it a name, and reuse it whenever you need it. In the Introduction to JavaScript, we wrote a few simple functions. This tutorial goes much deeper — we’ll cover how JavaScript handles scope, what closures are, and how to use functions as values (higher-order functions). Function Declarations vs Expressions There are two main ways to define a function. Read more →
April 14, 2026
Arrays
Arrays are one of the most-used data structures in JavaScript. They’re ordered lists of values, and they come with a rich set of built-in methods for searching, transforming, and iterating over data. If you’ve worked through Functions, you’ve already seen map, filter, and reduce in passing — this tutorial covers arrays from the ground up. Creating Arrays // Array literal (most common) const fruits = ["apple", "banana", "cherry"]; // Empty array const empty = []; // Arrays can hold mixed types (though you usually wouldn't) const mixed = [1, "hello", true, null, { name: "Alice" }]; // Array. Read more →
April 14, 2026
Variables and Data Types
In the Introduction to JavaScript, we touched on let, const, and the basic data types. This tutorial goes deeper — we’ll explore how JavaScript handles types under the hood, what type coercion actually does, and the practical patterns you’ll use daily like template literals, destructuring, and type checking. var, let, and const in Depth You already know the basics: use const by default, let when you need to reassign. But the differences go beyond reassignment — they affect scoping and hoisting. Read more →
April 3, 2026
Introduction to JavaScript
JavaScript is the programming language that makes websites interactive. While HTML gives a page its structure and CSS controls how it looks, JavaScript is what makes things happen — responding to clicks, updating content, validating forms, and much more. If you’ve ever clicked a button on a website and something changed without the page reloading, that was JavaScript at work. In this tutorial, we’ll cover the fundamentals you need to start writing JavaScript. Read more →
April 3, 2026
Node.js
Node.js is a powerful, server-side JavaScript runtime that allows you to build scalable and efficient network applications. Node.js is designed for server-side (back-end) development, although it can also be used to run desktop applications such as scripts, utility applications, or even video games. In this introductory tutorial, we’ll explore the basics of Node.js and guide you through creating your first Node server. Prerequisites Before we dive into Node.js, you’ll need to have the following installed on your computer: Read more →
November 4, 2023
JavaScript
Master JavaScript, the language of the web. From basics to advanced concepts like async programming and frameworks. Read more →
October 12, 2023
How the Web Works
In today’s digital age, we rely on the web for everything from shopping and entertainment to communication and information access. But have you ever wondered how the websites and web applications you use daily come to life? In this post, we’ll take you on a journey behind the scenes and explore how web development works, from writing code to delivering a seamless user experience. The Foundation: HTML, CSS, and JavaScript At the core of web development are three fundamental technologies: HTML (Hypertext Markup Language), CSS (Cascading Style Sheets), and JavaScript. Read more →
September 26, 2023