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 ↓
Are you ready to learn about JavaScript multidimensional arrays with clear explanations and practical examples? JavaScript multidimensional arrays are a powerful tool for organizing and manipulating complex data in your …
JavaScript provides multiple methods to obtain immutability, and one of the most well-known is Object.freeze(). In this article, we will discuss the concept of Object.freeze() in JavaScript, understand its purpose, …
Arrays are significant data structures in JavaScript that enable us to store multiple values in a single variable. The “push” method is a powerful feature that allows us to add …
How do we fill the array in JavaScript? Let’s explore the power of JavaScript’s Array.fill() method with our in-depth guide. Whether you’re a beginner or an experienced developer, this guide has something …
What is Array.from() method in JavaScript, and how do we use it? It is a versatile tool for creating new arrays from array-like or iterable objects. In this article, we …
JavaScript, being the foundation of modern web development, allow developers to create dynamic and interactive web pages. One of the important aspect of web development is managing HTML attributes. The …
Are you looking to take your web development skills to the next level and create a remarkable interactive web applications? In this post, we will discuss the JavaScript Quake, exploring …
How to reverse an array in JavaScript using the built-in Array.prototype.reverse() method? Well, stick around because this article provides a detailed explanation of the reverse() method, including its syntax, description, and examples of usage. …
Find out the power of the JavaScript Array slice() method with this comprehensive guide. Discover five (5) practical ways to use slice() to manipulate arrays, from selecting elements to creating shallow copies. …
In this article, we’ll delve deep into the concept of JavaScript set length, explore various array operations, and provide valuable insights and best practices to make your code more efficient …
As projects grow in size and elaboration, developers usually need to use external libraries or modules to maintain code organization and reusability. Two simple methods of including external code are …
Understanding array.prototype in JavaScript is crucial for unleashing the full potential of arrays in your code. Therefore this article will discuss the syntax and demonstrate practical examples of adding custom …
The Javascript Promisify function is a powerful utility that transforms callback-based functions into promises, simplifying the handling of asynchronous operations. In this article, we will delve into the details of …
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();.