react-beautiful-dnd-next/src/state/get-frame.js

Beautiful and accessible drag and drop for lists with React

// @flow
import invariant from 'tiny-invariant';

import type { DroppableDimension, Scrollable } from '../types';

export default (droppable: DroppableDimension): Scrollable => {
  const frame: ?Scrollable = droppable.frame;
  invariant(frame, 'Expected Droppable to have a frame');
  return frame;
};