Practice the factory pattern in typescript

adult.ts

import { Person } from "./person";

export class Adult extends Person {
    getStatus(): void {
        console.log('I am an adult!');
    }
}

app.ts

import { PersonFactory } from "./factory";

const people = [11, 12, 13, 14, 15].map(age => PersonFactory.createPerson(age));
people.map(p => p.getStatus());

child.ts

import { Person } from "./person";

export class Child extends Person {
    getStatus(): void {
        console.log('I am a child!');
    }
}

factory.ts

import { Adult } from "./adult";
import { Child } from "./child";
import { Person } from "./person";

export class PersonFactory {
    public static createPerson(age: number): Person {
        return age > 12 ? new Adult(age) : new Child(age);
    }
}

person.ts

export abstract class Person {
    private age: number;
    constructor(age: number) {
        this.age = age;
    }
    abstract getStatus(): void;
}