Function isInternalDropOperation

packages/react-aria/src/dnd/utils.ts:411–417

(ref?: RefObject<HTMLElement | null>)

// Util function to check if the current dragging collection ref is the same as the current targeted droppable collection ref.
// Allows a droppable ref arg in case the global drop collection ref hasn't been set
export function isInternalDropOperation(ref?: RefObject<HTMLElement | null>): boolean {
  let {draggingCollectionRef, dropCollectionRef} = globalDndState;
  return (
    draggingCollectionRef?.current != null &&
    draggingCollectionRef.current === (ref?.current || dropCollectionRef?.current)
  );
}

type DropEffect = 'none' | 'copy' | 'link' | 'move';
export let globalDropEffect: DropEffect | undefined;