How do I use classes in ES6?

How do I use classes in ES6?

In ES6, you can define a class using the class keyword. Here's a simple example:

class Person {
    constructor(name, age) {
        this.name = name;
        this.age = age;
    }
    greet() {
        console.log(`Hello, my name is ${this.name} and I am ${this.age} years old.`);
    }
}

This defines a Person class with a constructor and a method.

What is the purpose of the constructor?

The constructor is a special method for creating and initializing an object created with a class. It is called automatically when a new instance of the class is created.

Can I inherit from another class?

Yes, you can use the extends keyword to create a subclass that inherits from a parent class. For example:

class Student extends Person {
    constructor(name, age, studentId) {
        super(name, age);
        this.studentId = studentId;
    }
    study() {
        console.log(`${this.name} is studying.`);
    }
}

What is the super keyword used for?

The super keyword is used to call the constructor of the parent class. It allows you to access properties and methods of the parent class.