react-dnd 拖拽排序代码实现

React-dnd 拖拽排序是一种常见的前端交互方式，可以通过以下代码实现：1. 首先需要安装 react-dnd 和 react-dnd-html5-backend 两个库：```
npm install --save react-dnd react-dnd-html5-backend

import { DragDropContext, Droppable, Draggable } from 'react-dnd';
import { HTML5Backend } from 'react-dnd-html5-backend';

const items = [
{ id: 1, name: 'Item 1' },
{ id: 2, name: 'Item 2' },
{ id: 3, name: 'Item 3' },
{ id: 4, name: 'Item 4' },
{ id: 5, name: 'Item 5' },
];

<DragDropContext backend={HTML5Backend}>
  <Droppable droppableId="items">
    {(provided) => (
      <ul {...provided.droppableProps} ref={provided.innerRef}>
        {items.map((item, index) => (
          <Draggable key={item.id} draggableId={item.id.toString()} index={index}>
            {(provided) => (
              <li
                {...provided.draggableProps}
                {...provided.dragHandleProps}
                ref={provided.innerRef}
              >
                {item.name}
              </li>
            )}
          </Draggable>
        ))}
        {provided.placeholder}
      </ul>
    )}
  </Droppable>
</DragDropContext>

function onDragEnd(result) {
if (!result.destination) {
return;
} const newItems = Array.from(items);
const [reorderedItem] = newItems.splice(result.source.index, 1);
newItems.splice(result.destination.index, , reorderedItem); setItems(newItems);
}<DragDropContext backend={HTML5Backend} onDragEnd={onDragEnd}>
...
</DragDropContext>