What is the super keyword in ES6?

What is the super keyword in ES6?

The super keyword in ES6 is used to call functions on an object's parent class. It allows you to access properties and methods of the parent class.

Can you give me an example of how to use it?

Sure! Here's a simple example:

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

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

const myDog = new Dog('Rex', 'German Shepherd');
console.log(myDog.name); // Outputs: Rex

What happens if I don't use super in the constructor?

If you don't call super() in the constructor of a derived class, you'll get a reference error because the parent class's constructor needs to be called first to initialize the this context.