Builder Patron JavaScript

cars_builder.js

class VehiclesFactory {
	static build(builder) {
		builder.addParts();
		return builder.get();
	}
}

class CarBuilder {
	constructor() {
		this.car = new Car();
	}

	addParts() {
		this.car.addPart("engine");
		this.car.addPart("wheels");
		this.car.addPart("doors");
	}

	get() {
		return this.car;
	}
}

class TruckBuilder {
	constructor() {
		this.truck = new Truck();
	}

	addParts() {
		this.truck.addPart("engine");
		this.truck.addPart("wheels");
		this.truck.addPart("doors");
		this.truck.addPart("rock_decorations");
	}

	get() {
		return this.truck;
	}
}

class Car {
	constructor() {
		this.parts = [];
    this.name = "Car";
	}

	addPart(part) {
		this.parts.push(part);
	}

	say() {
		console.log(`I'm a ${this.name} with ${this.parts.join(", ")}.`);
	}
}

class Truck {
	constructor() {
		this.parts = [];
    this.name= "Truck";
	}

	addPart(part) {
		this.parts.push(part);
	}

	say() {
		console.log(`I'm a ${this.name} with ${this.parts.join(", ")}.`);
	}
}

const carBuilder = new CarBuilder();
const truckBuilder = new TruckBuilder();

const car = VehiclesFactory.build(carBuilder);
const truck = VehiclesFactory.build(truckBuilder);

car.say();
truck.say();