Chapter 18 — Error Handling (try/catch): Exercise 3 — Hard

Exercise 3 — Hard

Task:
Ikkita custom error class yarating: NetworkError va ValidationError (ikkalasi ham Errordan meros olsin). fetchData(url) nomli function yozing — agar url bo'sh bo'lsa ValidationError, agar url "http" bilan boshlanmasa NetworkError chiqarsin. try/catch bilan har ikkala holatni alohida-alohida boshqaring.
Required Concepts:

• Custom Error classes
• instanceof
• throw
  Hint:
  Chapter 18.6'dagi ValidationError misolidan namuna oling.