javascript-prototypes

Question 1

What kind of inheritance does the JavaScript programming language use?

Answer 1

JS uses prototype-based inheritance

Question 2

What is a prototype in JavaScript?

Answer 2

JavaScript prototype is simply an object that contains properties and (predominantly) methods that can be used by other objects.

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

Due to JS prototypes; models that was created that contain these 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

From the object’s prototype, if it’s not there then object’s object’s prototype