Use case for coroutines

Meal.js

export class Meal{
    constructor(name, dishes, dessert, drinks){
        this.name = name
        this.dishes = dishes;
        this.dessert = dessert;
        this.drinks = drinks;
    }

    addMedicines(medicines){
        this.medicines = medicines;
    }

    toString(){
        return `- ${this.name}:
        dishes: ${this.dishes? this.dishes.join(", "): ""}        
        desert: ${this.dessert || ""}
        drinks: ${this.drinks? this.drinks.join(", "): ""}
        medicines: ${this.medicines? this.medicines.join(", "): ""}
        `;
    }
}

medicinesAdditionCoroutine.js

import { User } from "./User.js";
import { Meal } from "./Meal.js";

let user = new User("Francoise");

//coroutine that consumes meals, adds medicines to them and sends them to a user
function* medicinesAdderFn(user){
    while (true){
        let medsGroups = [["morning pill"], ["afternoon pill"], ["dinner pill"]];
        for (let meds of medsGroups){
            let meal = yield null;
            meal.addMedicines(meds);
            user.haveMeal(meal);         
        }

        // let meal = yield null;
        // meal.addMedicines(["morning pill"])
        // user.haveMeal(meal);

        // meal = yield null;
        // meal.addMedicines(["afternoon pill"]);
        // user.haveMeal(meal);

        // meal = yield null;
        // meal.addMedicines(["dinner pill"])
        // user.haveMeal(meal);

    }
}

let meals = [
    new Meal("breakfast", ["croissant", "compota"], null, ["coffee", "water"]),
    new Meal("lunch", ["soup", "beans"], ["flan"], ["water"]),
    new Meal("dinner", ["pure", "cookies"], null, ["ekko", "water"]),
    new Meal("breakfast", ["pain au chocolat", "compota"], null, ["coffee", "water"]),
    new Meal("lunch", ["soup", "pasta"], ["riz au lait"], ["water"]),
    new Meal("dinner", ["omelet", "magdalenes"], null, ["ekko", "water"])
];

let medicinesAdder = medicinesAdderFn(user);


//initial call to "prime" the generator (runs the generator until executing the first yield)
medicinesAdder.next();
//normal calls to the generator providing values
for (let meal of meals){
    medicinesAdder.next(meal);    
}

User.js

export class User{
    constructor(name){
        this.name = name;
    }

    haveMeal(meal){
        console.log(`${this.name} is taking meal: 
        ${meal.toString()}`);
    }
}