What is Javascript Array Group by? How To Do It?
In this article, we will explore how to group by array in JavaScript, providing you with a clear understanding and hands-on examples. When dealing with arrays in JavaScript, there are …
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 ↓
What is Hasproperty Javascript? How To Use it?
In this article, we’ll cover everything you need to understand about the “Hasproperty” method in JavaScript-what it is, how it functions, and how you can leverage it to enhance the …
How To Use JavaScript Chalk? Know Its Benefits
In this article, we’ll go deep into the world of JavaScript Chalk, learning about its potential, uses, and practical implementation. JavaScript Chalk, also known as Chalkboard.js, is a flexible framework …
How to Build a JavaScript Web Scraper?
Creating a web scraper JavaScript can be a powerful skill to have in your developer package. Either you want to extract data from websites for analysis, automate constant tasks, or …
Backtick JavaScript: How to write better code with Template Literals
Revolutionizing the way we write code, discover the power of backticks in JavaScript. And learn how to write better code with template literals. This article covers everything you need to …
JavaScript Array Concatenation: How to Merge Arrays in JS?
Unfold the power of JavaScript Array concatenation or concatenate in this comprehensive tutorial. In this article, we are going to explore different methods for concatenating arrays, including the concat() method, the spread …
List Files in Directory JavaScript: Node.js + Browser Guide (2026)
Listing files in a directory with JavaScript looks simple, until you realize the language runs in two completely different worlds. In Node.js (server-side), you have the full fs module and …
What is listnode in JavaScript?
The listnode JavaScript plays an important role in simplify data organization and manipulation, especially when it comes to linked lists. Whether you are a professional developer or just starting your …
How to Use the focusin Event in JavaScript?
What is the focusin event in JavaScript, and how to use it? In this article, we will show you how to use focusin event to create interactive and user-friendly forms. …
What is the Purpose of the Modulo Operator in JavaScript?
In this article, you will learn the purpose of the modulo operator in JavaScript and discuss its applications in resolving programming challenges. JavaScript is a functional programming language used for …
What is Javascript init function? How it Works?
Are you curious about the JavaScript init function and how it operates? Well, among the many features and functions JavaScript provides, the init function plays a crucial role in ensuring …
What is Javascript file naming conventions?
Are you curious about the Javascript file naming conventions and how it operates? Well, among the many features and functions JavaScript provides, the file naming conventions play a crucial role …
What is JavaScript curly braces? When To Use It?
In this article, we’ll explore the many functions of curly braces in JavaScript, including how they improve code scoping, control flow, and organization, as well as how they differ from …
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.