SOLID Open/Closed principle

/* Open/Closed principle */
/* open for extensions, close for modification */
/* the problem is we cant add new ice cream flavor without editing iceCreamFlavorsArray */
/* we can easly fix that adding addFlavor function*/

/* BAD */
const iceCreamFlavors = ["chocolate", "vanilla"];
const iceCreamMaker = {
    makeIceCream(flavor) {
    if (iceCreamFlavors.includes(flavor)) {
        console.log("You have a ice cream.")
    } else {
        console.log("no ice cream for you.")
    }
  }
}

iceCreamMaker.makeIceCream("chocolate")
iceCreamMaker.makeIceCream("banana")

/* GOOD */
const iceCreamFlavors = ["chocolate", "vanilla"];
const iceCreamMaker = {
    makeIceCream(flavor) {
    if (iceCreamFlavors.includes(flavor)) {
        console.log("You have a ice cream.")
    } else {
        console.log("no ice cream for you.")
    }
  },

  addFlavor(flavor) {
    iceCreamFlavors.push(flavor)
  }
}

iceCreamMaker.addFlavor("banana")
iceCreamMaker.makeIceCream("banana")