What are interfaces in JavaScript OOP?

What are interfaces in JavaScript OOP?

In JavaScript, interfaces are not a built-in feature like in some other languages, but they can be simulated using abstract classes or by defining a contract that classes must follow.

Can you give me an example of how to implement an interface?

Sure! You can create a base class with methods that must be implemented by derived classes. Here's a simple example:

class Animal {
    speak() {
        throw new Error('Method not implemented.');
    }
}

class Dog extends Animal {
    speak() {
        return 'Woof!';
    }
}

class Cat extends Animal {
    speak() {
        return 'Meow!';
    }
}

In this example, Animal acts as an interface.

What are the benefits of using interfaces?

Using interfaces helps enforce a contract for classes, promotes code reusability, and enhances maintainability by ensuring that all derived classes implement the required methods.

Are there any limitations to using interfaces in JavaScript?

Yes, since JavaScript doesn't have built-in support for interfaces, it relies on conventions, which can lead to less strict enforcement compared to languages with native interface support.