Mastering Deep Copy Array JavaScript for Data Manipulation
JavaScript deep copy array requires creating a whole new array that is a duplicate of the original, rather than just copying references. In this article, we will discuss into 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 Await Timeout for Asynchronous Operations
In the landscape of web development, asynchronous programming plays an essential role in creating responsive and user-friendly applications. JavaScript, being one of the most well-known programming languages, allows developers to …
Discover How To Set Textarea Value JavaScript
One fundamental aspect of web development involves manipulating HTML elements, and in this article, we’ll delve into a crucial task: set textarea values using JavaScript. Before we dive into the …
What is a String Substring() Method in JavaScript?
Are you curious about what is substring() method in JavaScript? Read on to learn how to use it effectively for string manipulation. JavaScript provides several methods to work with substrings, but one …
JavaScript String Slice() Method: Explanations and Examples
Do you want to master the JavaScript slice() method with strings? Read on! In this article, you’ll learn how to extract substrings from a string, understand how start and end indices …
How To Remove Commas From String JavaScript? 3 Methods
In certain situations, removing commas from strings in JavaScript becomes essential to facilitate mathematical operations, data transformation, and validation processes. In fact, commas, serve as valuable tools for list separation, …
JavaScript Object Initialization with Methods and Examples
In this article, you are going to learn JavaScript object initialization, covering different methods, and best practices, and answering common questions along the way. JavaScript, the backbone of web development, …
JavaScript Splice() Method: How to Splice String in JS?
Is there a splice method for strings in JavaScript? Well, this article will help you find the answers to this question. Just keep on reading! This article is your go-to …
How to Export Multiple Functions in JavaScript
In this article, you are going to learn the process of JavaScript export multiple functions, covering different methods and scenarios. When working on larger projects, you typically need to organize …
What is the Global Object in Javascript?
This article aims to provide a straightforward overview of the Global Object in JavaScript, explaining its role as a container for globally accessible properties and functions. Comparable to a command …
JavaScript Date toisostring() method: How to use toisostring() in JS
Do you want to master JavaScript Dates with the toISOString() method? Read on! This article explores the toISOString() method in JavaScript, which converts Date objects into strings in ISO 8601 format. You will …
JavaScript Get Month Name with Examples
In this article, we will explore different methods of how to get full month name in JavaScript. One of the common requirement in web development is the required to display …
What is ++ in JavaScript? Exploring the Increment Operator
Have you ever come across the “++” symbol in JavaScript and wondered what it actually does? If you’re a programmer or someone interested in web development, this seemingly simple pair …
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.