Chapter 43 — Memory Management & Garbage Collection: Exercise 3 — Hard

Exercise 3 — Hard

Task:
EventManager class yarating — addListener(element, event, callback) metodi listener'ni qo'shadi va uni ichki array'da "eslab qoladi" ({element, event, callback} shaklida). removeAllListeners() metodi — barcha saqlangan listener'larni removeEventListener orqali to'g'ri olib tashlasin.
Required Concepts:

• addEventListener/removeEventListener (Chapter 33)
• Array (saqlash uchun)
  Hint:
  Har bir addListener chaqiruvida, {element, event, callback} object'ini ichki array'ga push qiling.