JavaScript Variable in Regex | How To Initialize And Use It
Are you looking at how to initialize Javascript variables in Regex, how to use it and why need regex? Then, this article is for you, as we go on we …
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 ↓
Master JavaScript Wait Page Load | Elevate User Experience
In this comprehensive guide, we’ll delve into the intricacies of JavaScript wait page load techniques. We’ll explore how to strike the perfect balance between interactivity and loading speed, enhance user …
What Is JavaScript Tilde? When And How To Use It?
When building dynamic and interactive web applications, one of the operators to master is JavaScript tilde(~). In this article, we will delve into the world of tildes in JavaScript and …
How to Fix Unminified JavaScript and CSS Files
Unminified JavaScript and CSS files can approximately impact your website’s performance, leading to slow load times and a poor user experience. To assure your website runs smoothly and effectively, it’s …
String includes() method in JavaScript
Explore what is string includes() method in JavaScript and how to use it. Keep reading to unlock the potential of JavaScript string includes() method. Are you ready to discover the power of string includes() …
Boosting User Experience with window.scrollBy JavaScript
In this article, we will discuss the window.scrollBy JavaScript and explore its applications, benefits, and implementation methods, backed by example codes and real understanding. In the dynamic web development, assuring …
Web Design with HTML CSS JavaScript and jQuery Set
This article will take you through the process of create engaging user experiences using Web Design with HTML CSS JavaScript and jQuery Set. A website is usually the first interaction …
JSON stringify() Method in JavaScript
Let’s find out and explore the power of the JSON.stringify() method in JavaScript. But wait, what is JSON.stringify, and what does it do? In this article, you will discover how …
JSON.parse() Method: How to parse JSON in JavaScript?
Are you wondering how to parse JSON using JSON.parse() method in JavaScript? Explore the world of JSON, a language-independent data format that’s essential for sending data from a server to …
Mastering JavaScript Error Logging for Web Development
In this article, you are going to learn the error logging in JavaScript, it is an important role in web development, and how to use its power for smooth user …
How To Map JSON Array JavaScript?
In this post, we’ll delve into the world of mapping JSON arrays in JavaScript, uncovering its significance, applications, techniques, and much more. What is map JSON array in JavaScript? Mapping …
Explore JavaScript where() Function | Collect.js Library
Since manipulating an array is a common task especially when you are dealing with a list of objects or primitive values, filtering arrays, then it’s where the where() function of …
How to get length number JavaScript? 6 Simple Steps
Getting the length of a number in JavaScript might sound simple, but there are several nuances and techniques to consider when working with different types of numbers. Whether you’re a …
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.