Q. What is the use of the `trackBy` function in *ngFor?

  • (A) To filter the items
  • (B) To sort the items
  • (C) To improve performance by tracking item identity
  • (D) To convert item to string
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✅ Correct Answer: (C) To improve performance by tracking item identity
Explanation: trackBy helps Angular track which items have changed, improving rendering performance.

Published by Mr. Dubey ⭐ 111.54K Points at 08-Jun-2025 12:25 pm in Angular

Explanation by: Mr. Dubey
trackBy helps Angular track which items have changed, improving rendering performance.

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