Javascript-constructors-Q&A

Question 1

What does the new operator do?

Answer 1

The new operator lets developers create an instance of a user-defined object type or of one of the built-in object types that has a constructor function.

1. Created blank object
2. Adds property to new object (__prototype__)
3. Binds the newly created object instance as the this contex
4. returns the object

Question 2

What property of JavaScript functions can store shared behavior for instances created with new?

Answer 2

prototype property

Question 3

What does the instanceof operator do?

Answer 3

instanceof is a binary operator used to test if an object is of a given type.