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javascript Codex

A modern, illustrated JavaScript course — from your first line of code to prototypes, closures, and the event loop, explained with diagrams and interactive animations.

CourseJavaScript Fundamentals Types, Functions & Classes Async, Modules & Modern JavaScript The Browser Platform Advanced Web Platform Ecosystem & Tooling Server-Side JavaScript JavaScript and AI Under the Hood Patterns and Architecture

StartIntroduction Variables Functions

ReferenceArticles About RSS feed MDN ECMAScript spec

JavaScript Codex — an illustrated JavaScript course.