How can I implement async validation for multiple fields in Formik?

How can I implement async validation for multiple fields in Formik?

You can use the validate function in Formik to handle async validation. You can return a promise that resolves or rejects based on your validation logic.

Can you show me an example of how to do that?

Sure! You can create a validation function that checks each field asynchronously. For example, you can check if a username is already taken by making an API call.

What if I want to validate fields only after the user has finished typing?

You can use the debounce function from lodash to delay the validation until the user stops typing for a specified duration.

Are there any libraries that can help with this?

Yes, libraries like Yup can be integrated with Formik for schema-based validation, which can simplify async validation.