js constructors

Question 1

What does the new operator do?

Answer 1

1. creates blank JS object
2. Adds propert to new object (__proto__) that links the constructor functions prototype object
3. Binds newly created object as the this context
4. Returns this if function doesn’t return object

Question 2

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

Answer 2

prototype

Question 3

What does the instanceof operator do?

Answer 3

returns boolean that tests if prototype property of a constructor appears anywhere in prototype chain of the object