Feature request: onUnmount field listener

[alex-golubtsov]

The proposal is the following:

<form.Field 
  name="field-name"
  listeners={{
    onUnmount: () => form.deleteField('field-name')
  }}

onUnmount callback would help to clean up things after a field is removed from the DOM.
In my particular case, I render field-name conditionally and want to remove field's value from the form when the field gets unmounted.

Currently, I have to use useEffect, which doesn't seem convenient enough.

[MatyCZ]

I'm facing the same issue where I need to remove a value from the form using useEffect.

Currently, we have an onMount listener, but there's no direct equivalent for unmount, which would be useful for cleanup (e.g., resetting or removing a field when a component is unmounted).

Is an onUnmount listener being considered?