Learn JavaScript
JavaScript is the language of the web. Every website you visit uses it. Learn to build interactive web pages, web apps, and full-stack applications with our free interactive lessons.
Run JavaScript directly in your browser — zero setup
See the same concepts in Python, C++, and Java side-by-side
Audio narration on every lesson
From console.log to async/await and DOM manipulation
12 modules covering fundamentals through system design
What you'll learn
1Variables (let, const), data types, and operators
2Conditionals, loops, and control flow
3Functions, arrow functions, and closures
4Arrays, objects, and modern ES6+ methods
5DOM manipulation and event handling
6Asynchronous JavaScript (promises, async/await)
7Object-oriented and functional patterns
8Building real web applications