Function getNewArray

src/components/SortableList.tsx:37–41

(array: T[], activeId: string, overId: string)

    if (overId == null || activeId == null) return

    function getNewArray(array: T[], activeId: string, overId: string) {
      const oldIndex = array.findIndex(section => section.id === activeId)
      const newIndex = array.findIndex(section => section.id === overId)
      return arrayMove(array, oldIndex, newIndex)
    }

    startTransition(async () => {
      setOptimisticItems(items => getNewArray(items, activeId, overId))