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 ↓
Is it hard to capitalize string in JavaScript using toUpperCase(), or fully known as String.prototype.toUpperCase() method? Well, this article will answer that question in a simple yet effective way. So, if you …
Today, we will explore the world of JavaScript arrays of strings. When working with textual data, string arrays play an important role. Keep reading! To learn how to work with …
In this tutorial, you will have to learn how to square a number in JavaScript. We will use simple language and approach to make it simple to understand for someone …
In this article, we will explore how to return an array from a function in JavaScript. Apart form that, you’ll discover different methods for creating and manipulating arrays, such as using …
Template strings, also referred as template literals is an important feature introduced in ECMAScript 6 (ES6) that brings to increase flexibility in working with strings in JavaScript. In this article, …
JavaScript is a versatile programming language that allows developers to work with different data structures, including maps. So, in this article, we will explore multiple methods to get map size …
JavaScript is a versatile programming language that allows developers to work with different data structures, including maps. So, in this article, we will explore multiple methods to sort a map …
Are you tired of spending hours on how to add JavaScript breakpoints for effective debugging? Look no further because, in this article, we’ll show you how to add breakpoints and make the …
In this article, you will learn how to use the String.valueOf() JavaScript method effectively and provide you with functional examples for a better understanding. Methods for Using the String.valueOf() JavaScript …
Are you still perplexed about how you are going to use the break statement from a for loop in JavaScript? Worry no more, as we will hand you how to …
In this article, you will learn of how to throw exceptions in JavaScript. How to Throw Exception in JavaScript? In JavaScript programming language, we can throw exceptions using the throw …
Learn how to effectively utilize the JavaScript array.every() method to test all elements of an array and discover its many useful applications. In this article, you’ll understand the syntax and what it …
In this article, you will learn how to use the timers in JavaScript and how you can increase the functionality and user experience of your JavaScript applications. Overview of Timers …
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();.