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When should you consider implementing ngDoCheck in your Angular component?

easy📝 Conceptual Q2 of 15
Angular - Lifecycle Hooks
When should you consider implementing ngDoCheck in your Angular component?
AWhen you want to listen to user input events
BWhen you want to run code only once after component initialization
CWhen you want to detect changes in objects or arrays that Angular's default change detection misses
DWhen you want to handle routing changes
Step-by-Step Solution
Solution:
  1. Step 1: Recognize Angular's default change detection limits

    Angular's default change detection checks object references but not deep changes inside objects or arrays.
  2. Step 2: Purpose of ngDoCheck

    ngDoCheck allows you to implement custom logic to detect such deep or complex changes.
  3. Final Answer:

    When you want to detect changes in objects or arrays that Angular's default change detection misses -> Option C
  4. Quick Check:

    ngDoCheck = Detect deep changes [OK]
Quick Trick: Use ngDoCheck for deep object or array change detection [OK]
Common Mistakes:
  • Using ngDoCheck for one-time initialization
  • Confusing ngDoCheck with event handlers
  • Expecting ngDoCheck to handle routing

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