JavaScript Refactoring: From Classes to Object Composition

Inheritance with JavaScript classes can quickly lead to rigid, fragile codebases that are difficult to modify as your application grows. By shifting your mindset from what an object is to what an object does, you can build highly flexible and reusable software. This course teaches you how to transition from traditional class-based inheritance to modern object composition using factory functions. You will start with foundational object-oriented concepts in JavaScript, understanding how prototype delegation works under the hood. From there, you will learn to identify the limitations of deep inheritance hierarchies and systematically refactor them into clean, composable functional patterns. You will also explore modern JavaScript features like object destructuring, property shorthand, and basic functional programming concepts that make composition seamless. What you'll learn: - Understand the core differences between class-based inheritance and object composition - Identify code smells and design flaws caused by tight coupling in class hierarchies - Build flexible, reusable factory functions to generate objects without the new keyword - Compose complex behaviors using Object.assign and spread syntax - Apply modern JavaScript patterns to keep your codebase clean, modular, and easy to test - Refactor real-world code structures from rigid classes to composable functions This course begins with essential definitions and prototype mechanics before guiding you step-by-step through practical refactoring scenarios. It is designed for beginner to intermediate JavaScript developers who want to write cleaner, more adaptable code. No prior experience with advanced design patterns is required. Start reading and transform the way you architect your JavaScript applications today.