JavaScript

Master JavaScript from basics to advanced

152 tutorials
12 of 152 tutorials
Jul 14, 2026· 6 min read

What Is JavaScript Used for in Web Development

JavaScript powers every interactive part of a website. Learn the real-world uses of JavaScript in web development, from form validation to full single-page applications.

JavaScript
Jul 14, 2026· 6 min read

Is JavaScript Frontend or Backend? Full Guide

JavaScript is both a frontend and backend language. Learn the difference between browser JavaScript and Node.js, what each is used for, and which one you should learn first.

JavaScript
Jul 14, 2026· 7 min read

The Complete History of JavaScript Explained

From a 10-day prototype in 1995 to the most popular programming language in the world. Learn the full history of JavaScript, the browser wars, and how the web was transformed.

JavaScript
Jul 14, 2026· 5 min read

JavaScript Strict Mode Use Strict Explained

Learn what JavaScript strict mode is, how to enable it with 'use strict', and how it catches silent mistakes that would otherwise go unnoticed.

JavaScript
Jul 14, 2026· 5 min read

Common Errors Caught by JavaScript Strict Mode

See the most common mistakes that JavaScript strict mode catches, including undeclared variables, read-only assignments, duplicate parameters, and more.

JavaScript
Jul 14, 2026· 7 min read

JS Variables Guide How to Declare and Use Them

Learn the three steps of working with JavaScript variables: declaring them with let or const, assigning values, and using them in expressions and function calls.

JavaScript
Jul 14, 2026· 6 min read

Why You Should Stop Using var in JavaScript

var has three dangerous behaviors that cause silent bugs: function scoping, redeclaration without errors, and hoisting with undefined. Here is why let and const replaced it.

JavaScript
Jul 14, 2026· 5 min read

What Are Dynamic Data Types in JavaScript

JavaScript is dynamically typed, meaning variables can hold any type of value and change types at runtime. Learn how dynamic typing works and how to use typeof.

JavaScript