What are the best practices for using Zone.js in Angular?

What are the best practices for using Zone.js in Angular?

When using Zone.js in Angular, it's important to minimize the number of zones created to improve performance. You should also avoid unnecessary change detection cycles by using NgZone.runOutsideAngular for tasks that don't require Angular's change detection.

Can you explain how runOutsideAngular works?

Sure! runOutsideAngular allows you to execute code outside of Angular's zone, which means Angular won't trigger change detection for that code. This is useful for performance optimization, especially for tasks like event listeners or animations.

Are there any common pitfalls to avoid?

Yes, a common pitfall is overusing runOutsideAngular, which can lead to missed updates in the UI. It's essential to balance performance with the need for change detection.

How can I test components that use Zone.js?

You can test components using Zone.js by leveraging Angular's testing utilities, which automatically handle zones. Just ensure your tests are aware of the asynchronous nature of zone-related changes.