How does async validation work in Redux Form?

How does async validation work in Redux Form?

Async validation in Redux Form allows you to validate form fields against a server or an external source asynchronously.

Can you give me an example of how to implement it?

Sure! You can use a function that returns a promise to validate fields. For instance, checking if a username is already taken.

What if I want to validate multiple fields at once?

You can return an object with multiple field validations from your async function, and Redux Form will handle them accordingly.

Are there any libraries that can help with this?

Yes, libraries like redux-form and redux-saga can help manage async validation effectively.