What is JavaScript Annotations? How to Use Its Types?
Are you a web developer looking to enhance the clarity and functionality of your JavaScript code? Look no further than JavaScript annotations. In this comprehensive guide, we will explore the …
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 ↓
JavaScript Array Extend | Comprehensive Guide
Are you ready to take your JavaScript skills to the next level? JavaScript Array Extend is a versatile feature that can greatly enhance your coding experience. In this comprehensive guide, …
Is JavaScript Faster Than Python? | Performance Differences
One common debate that arises is, “Is JavaScript faster than Python?” In this article, we will dissect the performance disparities between JavaScript and Python, shedding light on various aspects to …
JavaScript Maximum Call Stack Size Exceeded with Example
While working with JavaScript, you may encounter the extreme error message: “JavaScript Maximum Call Stack Size Exceeded“. In this article, we will discuss this error, provide real-world examples, and provide …
Mastering the JavaScript Switch Statement
Are you wondering what the JavaScript switch statement is? If so, keep on reading! In this article, we will discuss in detail the switch statement in JavaScript. Are you excited …
JavaScript QuerySelectorAll Data Attribute with Examples
One of the essential aspects of JavaScript is manipulating the Document Object Model (DOM) to dynamically update web content. In this post, you are going to learn the JavaScript QuerySelectorAll …
Math.round to 2 Decimal Places in JavaScript
Today, we will discuss Math.round to 2 Decimal Places in JavaScript. If you want to learn new insights, read on! In this article, you’ll discover how to round numbers to 2 …
How to Use JavaScript Standard Deviation
Are you ready to explore the JavaScript standard deviation? If you are a developer, data analyst, or anyone dealing with data, understanding this statistical concept is important. In this article, …
What is JavaScript Used for in Web Development?
Are you thrilled to know what is JavaScript used for in web development? Read on! You’ll understand how this versatile programming language enhances interactivity, creates dynamic content, enables animations, controls …
How JavaScript Check If Variable Exists?
In this comprehensive guide, we will explore various methods and techniques to check if variable exist in JavaScript. Whether you are a novice programmer or an experienced developer, this article …
How JavaScript Case Insensitive Compare?
Are you looking for an answer on how JavaScript case insensitive compares two strings? In this article, we’ll explore two common approaches to achieve case-insensitive string comparison in JavaScript. By …
What is JavaScript BigDecimal? How To Get Big Numbers
This article explores two key approaches to working with BigDecimal big numbers in JavaScript: using the built-in BigInt feature for large integers and leveraging the “decimal.js” library for precise decimal …
JavaScript Backend Frameworks
In this article, we will discuss these frameworks, exploring their understanding, the top contenders in the field, and why they are essential in modern web development. JavaScript Backend Frameworks Compared …
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.