JavaScript Encapsulation Tutorial

About This Tutorial

Encapsulation is a fundamental principle of object-oriented programming that bundles data and methods together while hiding internal implementation details. In JavaScript, encapsulation helps you create more maintainable, secure, and modular code by controlling access to an object's internal state.

This tutorial covers multiple approaches to encapsulation in JavaScript, from traditional closure-based techniques to modern ES2022 private fields, helping you choose the right approach for your projects.

What You'll Learn

• Understand encapsulation and why it matters
• Create private variables using closures
• Use the Module Pattern for encapsulation
• Implement private fields with ES2022 syntax
• Use WeakMaps for truly private data
• Apply getter and setter methods
• Build real-world encapsulated components
• Follow best practices for data hiding

Prerequisites

Understanding of JavaScript objects, functions, and closures. Familiarity with ES6 classes is helpful but not required.