Prototypal Inheritance in Function Objects

Prototypal inheritance from Object

How does prototypal inheritance/prototype chaining work when constructor functions are used to create objects? In a previous chapter, we discussed the Prototype object of the constructor functions.

It was concluded that all the properties (including methods) that were added to the prototype of the constructor function could be shared by the object instances created from it. Let’s dive into the details now.

As mentioned earlier every, constructor function initialized has a prototype property assigned to it known as the Prototype Object. It contains the properties constructor and __proto__ that sets the object’s [[Prototype]] property. Its [[Prototype]] is set to null. All the object instances created will have their [[Prototype]] reference to the prototype object. This was seen in a previous chapter through the following images: