How to validate a field as an email if it contains the "@" character

Hey,

Is it possible to conditionally validate a field based on its own content? I know it’s possible to do conditional validation based on another input using .when() , but couldn’t find anything using the field content itself.

Thank you in advance for your response

[elrhaff]

Yep, this worked

export const LoginSchema = Yup.object().shape({
  usernameOrEmail: Yup.string().when(".", {
    is: (val: string) => (val && val.includes("@")), //check val is defined and includes @
    then: emailValidator,
    otherwise: usernameValidator,
  }
});

Thanks a lot @jquense !

[jquense]

Try '.' for the field name