What are async validation functions and how do they work?

What are async validation functions and how do they work?

Async validation functions are used to validate data asynchronously, often in forms, allowing for real-time feedback.

Can you give me an example of how to implement one in JavaScript?

Sure! You can use a function that returns a promise. For example, checking if a username is available by making an API call.

What libraries or frameworks support async validation?

Libraries like React Hook Form and Formik support async validation, making it easier to handle form state.

Are there any common pitfalls to avoid when using async validation?

Yes, common pitfalls include not handling race conditions and failing to provide user feedback during validation.