Why keepDefaultValues option is required for recalculating dirtyFields on reset?

[SeokminHong]

react-hook-form/src/logic/createFormControl.ts

Lines 1422 to 1432 in 1b5a674

	dirtyFields: isEmptyResetValues
	? {}
	: keepStateOptions.keepDirtyValues
	? keepStateOptions.keepDefaultValues && _formValues
	? getDirtyFields(_defaultValues, _formValues)
	: _formState.dirtyFields
	: keepStateOptions.keepDefaultValues && formValues
	? getDirtyFields(_defaultValues, formValues)
	: keepStateOptions.keepDirty
	? _formState.dirtyFields
	: {},

For the above code, to recalculate dirtyFields on reset, keepDefaultValues is required. Is there any reason for it?

I want to implement "dirty on reset". A form is submitted to the server, but the user can continue editing the form while the API request is still in progress. Once the submission completes, the form is reset with the latest values from the API response, but the user's in-progress changes are preserved to accurately track which fields are now dirty.

For now, I'm calling reset twice sequently:

reset(values, {
  // Keep dirty fields
  keepDirtyValues: true,
  // To preserve form errors
  keepErrors: true,
  // To preserve revalidating mode
  keepIsSubmitted: true,
});
reset(values, { 
  // To recalculate dirtyFields state
  keepDefaultValues: true,
  // Keep user edited values
  keepValues: true,
  keepDirtyValues: true,
  keepErrors: true,
  keepIsSubmitted: true,
});