Angular - RxJS and Observables Fundamentals
Which Angular lifecycle hook is best suited to perform unsubscription from Observables?
Which Angular lifecycle hook is best suited to perform unsubscription from Observables?
easy🧠 Conceptual Q2 of 15
Step-by-Step Solution
Solution:
Step 1: Identify lifecycle hooks purpose
ngOnDestroy is called just before the component is removed from the DOM.Step 2: Match unsubscription timing
Unsubscribing should happen when component is about to be destroyed to free resources.Final Answer:
ngOnDestroy -> Option CQuick Check:
Unsubscribe in ngOnDestroy = C [OK]
Quick Trick: Use ngOnDestroy to clean up subscriptions [OK]
Common Mistakes:
MISTAKES- Trying to unsubscribe in ngOnInit
- Using ngAfterViewInit for unsubscription
- Confusing ngDoCheck with cleanup hook
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