npm install @dnd-kit/solid

import {createSignal} from 'solid-js';
import {DragDropProvider, useDraggable, useDroppable} from '@dnd-kit/solid';

function Draggable() {
  const {ref} = useDraggable({id: 'draggable'});
  return <button ref={ref}>Drag me</button>;
}

function Droppable(props) {
  const {ref} = useDroppable({id: 'droppable'});
  return <div ref={ref}>{props.children}</div>;
}

function App() {
  const [parent, setParent] = createSignal(null);

  return (
    <DragDropProvider
      onDragEnd={(event) => {
        if (event.canceled) return;
        setParent(event.operation.target?.id ?? null);
      }}
    >
      {parent() == null ? <Draggable /> : null}
      <Droppable>{parent() ? <Draggable /> : 'Drop here'}</Droppable>
    </DragDropProvider>
  );
}