Q. What does the trackBy function optimize in *ngFor?

  • (A) Performance by tracking list items by identity
  • (B) Change detection of inputs
  • (C) Form validation
  • (D) Routing speed
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✅ Correct Answer: (A) Performance by tracking list items by identity
Explanation: trackBy helps Angular identify items uniquely, reducing DOM manipulations.

Published by Mr. Dubey ⭐ 111.54K Points at 08-Jun-2025 11:55 am in Angular

Explanation by: Mr. Dubey
trackBy helps Angular identify items uniquely, reducing DOM manipulations.

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