add "shouldDirty" to append from useFieldArray

[quertenmont]

Is your feature request related to a problem? Please describe.
would it be possible to add the "shouldDirty" flag to the append of useFieldArray ?

The shouldFocus already exist, so I guess it shouldn't be a big deal.
Thanks in advance

[bluebill1049]

What's the use case?

[quertenmont]

The use case is typically that I want my form array to always contain X items,
so if this is not the case, I pragmatically append empty items to the form array in a useEffect function.

React.useEffect(() => {
  if (fields.length < 2) {
    append({value:0});
  }
}, fields)

Given that the user has not interacted with the form, it doesn't make sense to have the form marked as dirty.

Thanks in advance
Loic

[bluebill1049]

sounds legit. let's put on the feature board.

[bluebill1049]

After future investigation this is not possible or difficult to implement, because each input gets append/prepend will leave inputs as an empty string, which then fails against deep equal against defaultValues and will result dirty as true, and if we don't enforce such behavior, it will leave inconsistent behavior for the formState.

[ezrabowman]

It would be helpful to be able to add fields to a FieldArray in a non-dirty state.

Sample use case:

• User has the ability to add sections to my form of the same type of information (i.e. a form capturing multiple addresses).
• When the form loads, there is one instance of address in the field array
• User clicks "+ Add Another Address" and I use append to add the new address fields to the FieldArray
• All new fields are dirty although the user has not interacted with them

Note: This form uses the isDirty property to show the user what field they have changed when editing a record, so all the fields in the new address instance show up as dirty.

I am trying to come up with a work-around using some form of reset, but do not have a solution yet.

Also - @bluebill1049, you rock! Thanks for RHF.

[bluebill1049]

thanks for the feedback @ezrabowman

related feature request: #8309 will probably get to it later in the stage, it's not a simple config update. I will mark this as duplicated and track it in the other one.