subscribe a field to another field?

[FilipePfluck]

Is there a way to make react hook form retrigger the validation of a given field every time another field is updated? For example, imagine a password field and a confirm password. If the password is updated in such a way that they do not match anymore, I want to update the confirm password to show an error.

I know there is the watch api, and I solutioned the problem described above like this:

const password = watch('password.password')
const isConfirmPasswordDirty = dirtyFields.password?.confirmPassword
useEffect(() => {
if (isConfirmPasswordDirty) {
trigger('password.confirmPassword')
}
}, [watch, password, trigger, isConfirmPasswordDirty])

However, this is kinda verbose, and it would be handy if there was a way to automatically subscribe one field to another by passing a prop to it. Is there such a thing in react-hook-form? And if not, is it possible to consider implementing such an api?
If the answer to both questions is no, I can always create a custom implementation in my code base. But I still wanted to post this here.

Thanks in advance.

[Haschikeks]

You could have a look at the deps field of the register#options.

I'm not sure if you would need to have the password.confirmPassword use password.password as a deps, or the other way around.

[FilipePfluck]

@Haschikeks that's exactly what I was looking for! Thanks