closures.dev
1. Introduction - Pack your things2. How JavaScript Executes Code - Clear Blue Sky3. Execution Context - Multiverse4. Lexical Scope - Hide and Seek5. Closures - The Last Piece

The Closure Journey

Break down JavaScript Closures step by step, building the mental models that make closures feel natural — not magical. Start from the beginning, or jump straight to the last episode and challenge your knowledge.

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The Closure Journey illustration

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Introduction episode illustration
1

Introduction

What are the expectations for this journey?

How Javascript executes Code episode illustration
2

How Javascript executes Code

Understanding the JavaScript runtime.

Execution Contexts episode illustration
3

Execution Contexts

How JavaScript runs your code under the hood.

Lexical Scope episode illustration
4

Lexical Scope

How scope works in JavaScript.

Closures episode illustration
5

Closures

Bringing it all together with closures.