What are some examples of prototypal inheritance in JavaScript?

What are some examples of prototypal inheritance in JavaScript?

Prototypal inheritance allows objects to inherit properties and methods from other objects. A common example is using the Object.create() method.

Can you show me a code example of that?

Sure! Here's a simple example:

const animal = { 
  speak() { console.log('Animal speaks'); }
};

const dog = Object.create(animal);
dog.speak(); // Output: Animal speaks

What about using constructor functions?

Great question! You can also use constructor functions to achieve prototypal inheritance. Here's an example:

function Animal() {}
Animal.prototype.speak = function() { console.log('Animal speaks'); };

function Dog() {}
Dog.prototype = Object.create(Animal.prototype);
Dog.prototype.bark = function() { console.log('Dog barks'); };

const myDog = new Dog();
myDog.speak(); // Output: Animal speaks
myDog.bark(); // Output: Dog barks