react-hook-form 7.8.9-beta.0

Version 7.8.9-beta.0

on Node.js NPM

function Test() {
  const { control, register } = useForm();
  const { fields } = useFieldArray({
    control,
    name: "test",
  });

  return (
    {fields.map((field, index) => (
      <input
        key={field.id} // important to include key with field's id
        {...register(`test.${index}.value`)} 
-        defaultValue={field.value} // make sure to include defaultValue
      />
    ))}
  );
}