How can I improve performance in Angular using ngFor and ngIf?

How can I improve performance in Angular using ngFor and ngIf?

You can optimize performance by using trackBy with ngFor and minimizing the use of ngIf where possible.

What is trackBy and how does it help?

trackBy is a function that helps Angular identify which items have changed, are added, or are removed, improving rendering efficiency.

Can you give me an example of using trackBy?

Sure! In your ngFor, you can use it like this: *ngFor='let item of items; trackBy: trackByFn', where trackByFn is your function.

What about using ngIf? Any tips?

Try to avoid using ngIf in deeply nested structures. Instead, consider using *ngIf with a condition that minimizes DOM manipulation.