javascript-prototypes

Question 1

What kind of inheritance does the JavaScript programming language use?

Answer 1

prototype-based (or prototypal)

Question 2

What is a prototype in JavaScript?

Answer 2

When you create a new object, you can specify the object that should be its prototype. The new object will then inherit the properties and methods of its prototype.

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

Because those methods are stored in the prototype

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

javascript will look for it in the prototype