JavaScript Inheritance Explained | Master Object-Oriented Programming in JavaScript

Want to write cleaner, reusable, and more organized code in JavaScript? In this beginner-friendly tutorial, you’ll learn how to use inheritance in JavaScript—one of the core principles of Object-Oriented Programming (OOP). Whether you’re building web applications, games, or working with complex data models, understanding inheritance will help you avoid code duplication and improve your architecture.

With the ES6 class syntax, inheritance in JavaScript is easier and more readable than ever. This video breaks it all down step-by-step!

What You’ll Learn in This Video:

What is inheritance in JavaScript?
Why use inheritance?
How to create a base (parent) class
How to extend a class using the extends keyword
How to use the super() function
Overriding methods in child classes
Real-world examples of inheritance

Code Examples from the Video:

Defining a Base Class:

class Animal {
constructor(name) {
this.name = name;
}

speak() {
console.log(`${this.name} makes a sound.`);
}
}

Creating a Subclass with extends:

class Dog extends Animal {
constructor(name, breed) {
super(name); // call the parent class constructor
this.breed = breed;
}

speak() {
console.log(`${this.name} barks. It's a ${this.breed}.`);
}
}

const myDog = new Dog("Buddy", "Golden Retriever");
myDog.speak(); // Output: Buddy barks. It's a Golden Retriever.

Why Inheritance Matters:

* Promotes code reuse and cleaner structure
* Makes your applications more scalable
* Encourages the use of shared behaviors and properties
* Supports polymorphism and method overriding

Additional Resources:

MDN JavaScript Classes & Inheritance: [https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Classes](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Classes)
JavaScript.info – Class Inheritance: [https://javascript.info/class-inheritance](https://javascript.info/class-inheritance)
Real Python – Object-Oriented JavaScript: [https://realpython.com/oop-in-javascript/](https://realpython.com/oop-in-javascript/)

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Would you like a follow-up video on composition vs inheritance or how to use mixins in JavaScript? Let us know in the comments!