isPrototypeOf in Javascript

Question

I am a beginner to JavaScript and on my way to Prototypes in JavaScript.
As per the article here

Creating

Answer 1

I would agree that terminology is incorrect.

The constructor function has a prototype property which defines the properties and methods in the prototype chain; but it is not itself the prototype of an object, it is the constructor.

isPrototypeOf is not called on the constructor itself, but on the constructor's prototype property.

alert(person.prototype.isPrototypeOf(myFather)); // true

myFather would be an instanceof person, and you can test this using the following line.

alert(myFather instanceof person); // true