Article: Composition Alone Can't Replace Inheritance - helper functions

helperFunctions.js

const monsterBehaviors = {
  attack() {
    playHurtAnimation()
  },
  die({ monsterId, dropLoot }) {
    userInventory.add(dropLoot())
    removeFromUi(monsterId)
  },
}

export class Slime { ... }

export class Skeleton { ... }

export class Clown {
  #id = Math.random()

  dropLoot() {
    return [new Key()]
  }

  attack() {
    monsterBehaviors.attack()
    if (itsTime()) {
      showCutScene()
    }
  }

  die() {
    return monsterBehaviors.die({
      monsterId: this.#id,
      dropLoot: () => this.dropLoot(),
    })
  }
}