What does ++ mean in JavaScript and How to Use it?
If you’re not familiar with the ++ sign in JavaScript, you might be wondering what does ++ means and how to use it. In this article, we’ll explain in detail …
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 ↓
3 Ways to Remove an Empty String from an Array in JavaScript?
In today’s tutorial, we will hand you the three (3) effective solutions to remove empty strings from an array in JavaScript. So bear with us as we explore different methods …
Understanding the JavaScript Array Constructor
Are you wondering what is JavaScript array constructor? Read on! In this article, you’ll learn how to create and initialize arrays in different ways, understand the syntax and parameters, and …
How to use indexOf to find the Index of objects in JavaScript Array?
Do you want to know the solutions on how to use the indexOf method to find the Index of Objects in JavaScript Arrays? Keep on reading! In this article, we …
What is JavaScript remainder (%) Operator?
Are you ready to explore the intricacies of the JavaScript remainder operator %? Keep on reading! In this article, you’ll understand its usage in various scenarios, such as determining even or odd …
How To Use .getcontext JavaScript? A Ultimate Guide
In this comprehensive guide, we will delve deep into the getContext() method in JavaScript, exploring its intricacies, applications, and best practices. Whether you are a seasoned developer looking to refresh …
Forced Reflow While Executing JavaScript
In this article, we’ll delve deep into forced reflow While Executing JavaScript, its causes, implications, and how to mitigate its impact effectively. What is forced reflow while executing JavaScript? Forced …
Prepend Array JavaScript with Method and Example Codes
In this article, we will discuss the prepend array JavaScript method, providing you with a thorough understanding of how to use it effectively. JavaScript is a functional programming language, and …
What is console.table in JavaScript? How To Use It?
One line of code that can significantly enhance your web development skills is console.table in JavaScript. In this comprehensive guide, we will dive deep into the realm of console.table JavaScript, …
Reverse Linked List JavaScript
In this article, we will discuss in detail the reverse linked lists in JavaScript, exploring the why, how, and when of this important task. What is Reverse Linked List JavaScript? …
Mastering JavaScript Arithmetic Operations
How can we use JavaScript arithmetic operations to manipulate numbers? Read on to discover new insights about these operations. Most of us love Math, right? Well, maybe not everyone, but …
Object Reference in JavaScript with Example Codes
In this article, you will have to learn the fundamental concept of Object Reference in JavaScript, ensuring you will understand it thoroughly. JavaScript, usually referred to as the “language of …
JavaScript Test if String Contains Substring
In this article, we will discuss the JavaScript Test if String Contains Substring. Whether you are a beginner or an experienced developer, this article will provide you valuable understanding into …
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.