What is the easiest way to test for class membership in coffeescript?

Question

I\'m looking for an equivalent of Ruby\'s \"blah\".is_a?(String) of Objective-C\'s [@\"blah\" isKindOfClass:[NSString class]]

Answer 1

It feels wrong for me to create an instance of a class. You never know, what parameters the constructor might expect.

So what I came up with is this:

class A
class B extends A

console.log B.__super__ is A.prototype# => true