How to add custom JavaScript to Squarespace?
This article will uncover how to add custom JavaScript to your Squarespace website and transform it from a static page into an interactive experience. Unleash the power of JavaScript on …
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 ↓
Best Practices for Utilizing the JavaScript Console Log Object
In this article, we will discuss the different conditions of the console log object in JavaScript and how it can be used to strengthen your coding experience. Whether you’re a …
Javascript conditionally add property to object in an easy way
Today, we will explore how to conditionally add property or members to an object in JavaScript based on specific conditions. In this article, we’ll show you how to use if statements, the …
Algorithm Practice JavaScript: Mastering the Art of Problem Solving
Welcome to the algorithm practice in JavaScript! In this article, we will discuss the complexity of algorithms and how to resolve problem-solving using JavaScript. Whether you’re a beginner or an …
How to Fix the Issue of $ Not Working in JavaScript?
JavaScript is a dominant programming language that allows developers to make dynamic and engaging web pages. One of the common encountered issue while working with JavaScript is when the $ …
JavaScript CSV to Array: Converting Techniques and Methods
Are you working with CSV files in JavaScript and looking for a way to efficiently process the data? Converting Javascript CSV to arrays is the key to unlocking the full …
Mastering the date getTime() method in JavaScript
Today, we are going to explore how to master the getTime() method in JavaScript and take control of the date and time in your code. This article covers everything you …
JavaScript Document write: Examples, Syntax, and Benefits
One of the fundamental functions in Javascript is the document.write method, which enables developers to generate content dynamically and manipulate the DOM (Document Object Model) in real time. This article …
JavaScript Enumerator: A Powerful Tool for Iteration
In this article, we will explore the JavaScript Enumerator syntax, parameters, and provide example programs to demonstrate how to use it effectively. In the world of JavaScript programming, efficient iteration …
JavaScript Empty String: Definition, Initialization, and Usage
In this article, we will explore the different ways and recommend methods associated with the empty string in JavaScript. By the conclusion, you will gain a wide comprehension of effectively …
How to check for Alphabetic Characters in JavaScript with isAlpha
In this article, we’ll delve into how to use the isAlpha function in JavaScript to easily validate alphabetic input in your code. Our guide provides a step-by-step approach to implementing …
How to use DOM Element hasAttribute() method in Javascript?
Find out how to use the JavaScript hasattribute() method to determine if a DOM element has a specific attribute. This article provides a comprehensive guide that includes clear explanations and code examples so …
JavaScript isObject: Exploring the Key Concept
In the world of JavaScript programming, the isObject function plays a crucial role. It allows developers to determine whether a value is an object or not. Understanding how to use …
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.