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 ↓
Learn how to handle the button double-click events in JavaScript using the dblclick event. This article provides examples and explanations on how to use the addEventListener method to attach an …
In web development, technologies like JavaScript Relay play an important role in optimizing and streamlining web applications. JavaScript Relay is a powerful library that improves the performance of data fetching …
Are you ready to discover how to display JavaScript objects using the console.log method and can improve your coding skills? Learn how to use it for debugging and improve your coding skills. …
JavaScript, as one of the most well known programming languages, provides different features and methods that might look complex at first peek but can greatly improve your coding prowess. One …
Picture a whirlpool sucking you into an endless dance-that’s how an infinite loop in JavaScript looks. It’s like a persistent code spinning nonstop, trapping your program, and annoying users. But …
In the realm of JavaScript, a method exists that grants you access to a universal clock, unaffected by worldly time zones-getUTCDate(). This method allows you to pluck the day of …
When it comes to string manipulation in JavaScript, developers usually encounter two similar-sounding JavaScript Substring vs. Substr. Both methods are necessary for extracting portions of a string, but they have …
Discover the power of binary search in JavaScript, and don’t miss out on this valuable tool. In this article, you’ll learn how to find data in sorted arrays faster and more …
One of the less-popular yet highly beneficial methods within JavaScript is the concept of “floor division“. This method, although usually dominated by more prominent features, can significantly improve the efficiency, …
In this article, you will learn about binary in JavaScript and converting decimal numbers and strings to binary in JS. We will provide detailed explanations and code examples to help …
In working with web development, envitably we encounter errors such as Javascript Invalid Date. This error if you are not familair with might be a cryptic message for you. Therefore, …
In this article, we will discuss the concept of reflect in JavaScript and provide you with clear examples to understand its potential. What is Reflection in JavaScript? Reflection in JavaScript …
In this article, we will explore what is a blob in JavaScript and how to use it. Discover the power of JavaScript Blob, a flexible and useful tool for working …
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();.