How to get child classes which implement a certain base class using reflection in Type Script?

Question

Can we use reflection in Type Script just like C# to get the list of classes which implement a certain base class?

For example, let say Snake and Horse implement the

Answer 1

One way to do it would be to keep track of all the classes you create in one global array:

var allClasses = []
function register(c) {
  allClasses.push(c);
}
register(class Animal {});
register(class Snake extends Animal {});
register(class Horse extends Animal {});
register(class Car {});

and when you need classes that inherit from particular class just filter out the ones you want:

Object.values(allClasses).filter((c) => Animal.isPrototypeOf(c))

This solution is not specific to Typescript, it'll work with pure JavaScript too.