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 ↓
In this article, you are going learn the lazy loading JavaScript, exploring its benefits, implementation methods, and best practices. In digital age, website performance plays an important role in attracting …
Are you wondering how to create or add a dynamic calendar in your JavaScript code? In this article, we will show you the process of building a calendar with HTML, CSS, …
In this article, you are going to learn the JavaScript onmouseover, providing you with step-by-step guidance, example codes, and answers to frequently asked questions. One of the necessary features of …
Discover the various methods of how to compare two dates in JavaScript. This article provides a comprehensive guide working with dates and times in JavaScript, including examples and solutions for comparing …
In this article, we will explore the factors why Javascript is so popular, its advantages, and why it remains a top choice for developers across various domains. From web development …
In this article, we will discuss the concept of the “JavaScript async constructor” and its understanding in asynchronous programming. It is generally used for creating interactive and dynamic web applications. …
One of the appealing features of JavaScript type coercion, which plays an important role in the language’s action. In this article, you are going to what type coercion is, how …
Is it hard to get the day of the week in JavaScript? Well, keep reading to discover the easy and simple way of getting the day using the getDay() method. In …
Converting CSV to JSON is a common task, and in this article, we’ll explore the process in-depth, focusing on the powerful csvtojson library in Javascript that makes this task a …
Zero padding in JavaScript involves the addition of leading zeros to a number, guaranteeing that it always occupies a specific number of digits. In this article, we will delve into …
Explore the full potential of for each or forEach method with this easy guide on mastering key value iteration in JavaScript. Learn how key-value pairs work in JavaScript objects and how to …
One of the important features of JavaScript is the ability to set data attributes, which provide a proper way to store data directly within the HTML elements. In this article, …
Learn and understand what is event loop in JavaScript and how the event loop manages asynchronous events. Allowing it to handle multiple tasks at once. This mechanism works on a single thread, using …
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();.