javascript-prototypes

Question 1

What kind of inheritance does the JavaScript programming language use?

Answer 1

Prototype-based or prototypal inheritance

Question 2

What is a prototype in JavaScript?

Answer 2

An object that gives methods and properties to other objects based on its reference point.

Question 3

How is it possible to call methods on strings, arrays, and numbers even though those methods don’t actually exist on strings, arrays, and numbers?

Answer 3

The methods are given to those types based on its prototype and they point to their specific prototype object to use those methods.

Question 4

If an object does not have it’s own property or method by a given key, where does JavaScript look for it?

Answer 4

The object will go up a layer at a time and look for the property or method in the grandpa object then the great-grandpa object etc etc.