SortableJS is a lightweight JavaScript library designed to add drag-and-drop sorting capabilities to lists and grids in web applications. Its core features include enabling users to rearrange items in a list using simple drag-and-drop gestures, supporting both single and multiple connected lists, and providing a variety of configuration options for customization. SortableJS is most effective in scenarios where you want users to intuitively reorder items—such as to-do lists, photo galleries, or Kanban boards—without requiring page reloads or complex manual coding. This makes it highly valuable for interactive interfaces where the order of items matters and should be easily changed by the user.