JavaScript Classes Explained | Learn Object-Oriented Programming in JavaScript with ES6+

In this beginner-friendly tutorial, you'll learn how to use classes in JavaScript to build structured, reusable, and scalable code using the power of Object-Oriented Programming (OOP). Introduced in ES6, JavaScript classes provide a cleaner, more intuitive syntax for creating and managing objects—just like in languages such as Java or Python.

Whether you're building a game, a UI component, or modeling data structures, understanding how to use classes is essential for writing modern JavaScript.

What You’ll Learn in This Video:

What is a class in JavaScript?
How to define and instantiate a class
Using constructors to initialize properties
Adding methods to a class
Working with class inheritance (extends & super)
Understanding the ‘this’ keyword in class context
Real-world examples of using classes in JS

Code Examples from the Video:

Defining a Class:

class Person {
constructor(name, age) {
this.name = name;
this.age = age;
}

greet() {
console.log(`Hi, my name is ${this.name}.`);
}
}

const user1 = new Person("Alice", 25);
user1.greet(); // Output: Hi, my name is Alice.

Inheritance with extends and super:

class Student extends Person {
constructor(name, age, grade) {
super(name, age);
this.grade = grade;
}

study() {
console.log(`${this.name} is studying in grade ${this.grade}.`);
}
}

const student1 = new Student("Bob", 16, 10);
student1.study();

Why Use Classes?

* Organize your code using reusable blueprints
* Simplify complex systems using inheritance
* Make your JavaScript more maintainable and modular
* Build scalable apps and APIs with OOP patterns

Helpful Resources:

MDN Docs – JavaScript Classes: [https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Classes](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Classes)
JavaScript.info – Classes: [https://javascript.info/class](https://javascript.info/class)
ES6 Guide – [https://es6.io](https://es6.io)

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Take your JavaScript skills to the next level—learn how to model data and behavior with classes today!

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Would you like a follow-up video on JavaScript prototypes or private fields in classes? Let me know in the comments!