Learn JavaScript, one small idea at a time.

Short chapters with code you can run and change on the page. No install, no account, nothing to set up.

Getting started

Introduction Where To Put It Output Statements Syntax Comments

Fundamentals

Variables let const var Operators Arithmetic Assignment Comparison Logical Data Types typeof Type Coercion Truthy and Falsy Equality Strict Mode

More chapters are on the way

The tutorial is being written in order. Every chapter listed above is finished, runnable and linked; strings, arrays, objects, functions, the DOM and the rest are on their way.