10 Effective ways to Remove Element from an array in JavaScript
Do you want to know how to remove elements from an array in JavaScript? Well, just keep reading to know these ten (10) effective and ultimate solutions that will help …
JavaScript Tutorial 2026: Free ES6+ Beginner to Advanced
JavaScript is the only language that runs natively in every web browser, making it essential for any web-based BSIT capstone, modern web application, or interactive site. This hub collects free JavaScript tutorials from basic variables and functions through modern ES6+ features, DOM manipulation, async programming, and integration with REST APIs.
What you’ll learn in the JavaScript tutorial series
Core fundamentals: variables (let/const), data types, operators, conditionals, loops
Functions: declarations, expressions, arrow functions, closures, callbacks
DOM manipulation: selecting elements, modifying content, event handling
ES6+ features: destructuring, spread/rest, template literals, modules
Async programming: Promises, async/await, fetch API, error handling
Array methods: map, filter, reduce, find, forEach (functional programming patterns)
Object-Oriented JavaScript: classes, prototypes, inheritance, getters/setters
Modern tooling: npm, webpack/Vite, ESLint, Prettier
Why every BSIT student should know JavaScript
JavaScript is unavoidable in modern web development, it’s the only language browsers natively execute. Even capstones built on PHP + MySQL back-ends need JavaScript for client-side validation, AJAX form submissions, dynamic UI updates, and modern interactive features. Beyond browsers, Node.js lets you write server-side JavaScript too, opening up the entire MEAN/MERN/MEVN stack family.
JavaScript vs TypeScript: which should I learn?
Start with JavaScript first to understand the core language. Once you’re comfortable, TypeScript is a superset that adds optional static typing, it catches more bugs at compile time and is the modern standard for large React/Vue/Angular projects in 2026. Most BSIT capstones can use either; pick TypeScript if your panel values type safety and modern best practices.
Related JavaScript resources
JavaScript Projects, 55+ downloadable JS capstones
React Projects, JS framework for modern UIs
Vue.js Projects, alternative front-end framework
Node.js Projects, server-side JavaScript
TypeScript Tutorial, add types to your JS
AJAX Projects, async API patterns
Scroll down to browse the full JavaScript tutorial catalog ↓
Mastering JavaScript AWS SDK
When it comes to cloud services, Amazon Web Services (AWS) stands tall as a head. To utilize the whole potential of AWS within your JavaScript applications, you need a powerful …
JavaScript Email Regex with Example Codes
In this article, you will have to learn the JavaScript email regex validation using regular expressions, providing you with the examples and codes to implement on your projects. Whether you …
How to Encode and Decode with Base64 in JavaScript?
How to encode and decode strings using Base64 in JavaScript? This article introduces the btoa and atob functions available in modern web browsers and provides examples of how to use …
Adding classes to HTML elements with JavaScript’s classList.add()
Let’s unlock the full potential of classList.add() method in JavaScript and learn how to dynamically add CSS classes to your HTML elements. This article provides easy-to-follow instructions and examples to help …
Mastering JavaScript Math Pi with Example Codes
In this article, we will discuss JavaScript’s math Pi mastery, especially focusing on the ambiguous Pi. One of the most fascinating aspects of JavaScript is its mathematical capabilities, allowing developers …
JavaScript Error Occurred in the Main Process
In web development, encountering errors is unavoidable, and one of the common errors that developers usually experience is the “JavaScript Error Occurred in the Main Process“. This error can be …
How to create a dictionary in JavaScript with key-value pairs?
Are you ready to create a dictionary in JavaScript? To create a dictionary, we just need something called JavaScript Objects. We put our information into pairs, like a key and a …
Mastering How To Use JavaScript fromCharCode
JavaScript, which is a used and versatile programming language provides a tool called fromCharCode that makes it easier to create strings using sequences of Unicode character code values. This tool …
Master JavaScript getBoundingClientRect | Ultimate Guide
The getBoundingClientRect() method is a crucial element of JavaScript. It is a key component of the Document Object Model (DOM) manipulation toolbox. This approach allows for greater accuracy when estimating …
How Javascript Get Domain From URL? | 4 Methods
One common task developers encounter is extracting domains from URLs. Whether you’re building a web app, analyzing website traffic, or implementing security measures, the ability to obtain the domain from …
What is Double Bang (!!) Operator in JavaScript and How it Works?
Find out the power of the double bang (!!) operator in JavaScript. Learn how this shorthand technique can quickly convert truthy and falsy values to booleans, simplifying your code and improving its readability. Discover the …
JavaScript Operator Three Dots
The JavaScript Operator Three Dots, also known as the Spread Syntax, is a powerful and functional tool that has transformed the methods developers manipulate arrays, objects, and function arguments in …
Frequently Asked Questions
Do I need to learn JavaScript before React or Vue?
Yes, solid JavaScript fundamentals are essential before tackling frameworks. Spend at least 4-8 weeks on core JS (variables, functions, arrays, objects, DOM, async) before touching React, Vue, or Angular. Jumping straight to a framework without knowing the underlying language leads to copy-paste developers who can't debug or extend their code, panels notice this in defense. ES6+ syntax (arrow functions, destructuring, spread/rest) is mandatory before frameworks.
What's the difference between var, let, and const?
var is the old (pre-2015) way to declare variables, function-scoped, hoisted, can be redeclared. Avoid in modern code. let is block-scoped, can be reassigned, can't be redeclared in the same scope. Use for variables whose value will change. const is block-scoped, can't be reassigned. Use by default; switch to let only when reassignment is needed. Rule of thumb: const by default, let when needed, never var.
What's async/await and why does it matter?
async and await are modern JavaScript syntax for working with Promises (asynchronous operations like fetching data from an API). Old callback-based code becomes deeply nested ("callback hell"). Promises improved this. async/await makes asynchronous code read like synchronous code, much easier to follow. Essential for any modern web app that talks to a server: const response = await fetch('/api/users'); const data = await response.json();.How do I run JavaScript outside a browser?
Install Node.js (free, cross-platform from nodejs.org), it's a JavaScript runtime that lets you execute .js files from your terminal. Use cases beyond browsers: server-side web apps (Express, Fastify, NestJS), command-line tools, build tooling (webpack, Vite), desktop apps (Electron), testing scripts (Jest, Playwright). Browse our Node.js Projects for server-side examples.
Should I learn TypeScript instead of JavaScript?
Learn JavaScript first, then add TypeScript when you're comfortable. TypeScript is JavaScript with optional static typing, it catches more bugs at compile time but adds complexity. For 2026 capstones using React/Vue/Angular, TypeScript is increasingly the standard. For pure jQuery or vanilla JS capstones, TypeScript is overkill. See our TypeScript Tutorial when you're ready.
What can I build with JavaScript for my capstone?
Browser-only capstones: games (Tic-Tac-Toe, Hangman, Memory, Flappy Bird), calculators and converters, interactive dashboards with Chart.js. Front-end + back-end (full-stack): MERN stack capstones (React + Express + MongoDB), real-time chat apps with Socket.io, e-commerce front-ends consuming a PHP back-end. Browse our JavaScript Projects for examples.