Check if object is a 'direct instance' of a class

Question

I have two classes:

class Bar extends Foo { // Foo isn\'t relevant
  constructor(value) {
    if (!(value instanceof Foo)) throw \"InvalidArgumentException:          


        

Answer 1

If you know all of your classes you can use

if(!(value instanceof Foo && !(value instanceof Bar) && !(value instanceof Baz)))