personae/app/composables/useRevertible.js

export function useRevertible(initialValue) {
  const original = ref()
  const model = ref()
  const editedFields = computed(() => findUpdated(original.value, model.value))
  const isEdited = computed(() => !_isEmpty(editedFields.value))
  const revert = () => (model.value = original.value)

  // TODO: notify on change
  watch(
    initialValue,
    (newValue) => {
      original.value = _clone(toValue(newValue))
      model.value = _clone(toValue(newValue))
    },
    { deep: true, immediate: true }
  )

  return { original, model, editedFields, isEdited, revert }
}