Javascript-prototypes Flashcards

1
Q

What kind of inheritance does the JavaScript programming language use?

What is a prototype in JavaScript?

A
  1. prototypal (prototype based inheritance)

2. an object that has functionality that other object can appoint to

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2
Q

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

A

1.it follows the prototype chain to get the method.

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3
Q

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

A

1.In the object prototype, and if it doesn’t have it then it goes up to that object prototype. (prototype chain all the way up!)

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