What are the best practices for using async validators in forms?

What are the best practices for using async validators in forms?

When using async validators, ensure they are efficient and only trigger when necessary to avoid performance issues.

Can you give an example of when to use an async validator?

Sure! Use async validators for checking unique usernames or email addresses during form submission.

How do I implement an async validator in Angular?

In Angular, you can create an async validator by returning an observable from a function that checks the validity asynchronously.

What are some common pitfalls to avoid with async validators?

Common pitfalls include not handling race conditions and failing to debounce user input, which can lead to excessive API calls.