ConcreteFactory.ts

import { AbstractFactory } from 'AbstractFactory';
import { ConcreteProductA1, ConcreteProductA2 } from 'ProductA';
import { ConcreteProductB1, ConcreteProductB2 } from 'ProductB';

export class ConcreteFactory1 implements AbstractFactory {
  public createProductA(): AbstractProductA {
    return new ConcreteProductA1();
  }

  public createProductB(): AbstractProductB {
    return new ConcreteProductB1();
  }
}

export class ConcreteFactory2 implements AbstractFactory {
  public createProductA(): AbstractProductA {
    return new ConcreteProductA2();
  }

  public createProductB(): AbstractProductB {
    return new ConcreteProductB2();
  }
}