/**
 * Returns how far to scroll in one frame when the pointer is close to the start or end edge of a scrollable area.
 * The speed grows as the pointer gets closer to, or goes past, the edge.
 * It works for both axes: pass `clientY` with the top and bottom edges, or `clientX` with the left and right ones.
 * @param {number} position The pointer position on the scroll axis.
 * @param {number} start The start edge of the area: top or left.
 * @param {number} end The end edge of the area: bottom or right.
 * @returns {number} The scroll delta in px: negative scrolls toward the start, positive toward the end, `0` doesn't scroll.
 */
export declare function getEdgeScrollDelta(position: number, start: number, end: number): number;
/**
 * Returns the vertical bounds of the part of the page on screen, in client coordinates.
 * With pinch zoom, the visual viewport is smaller than the layout viewport that client coordinates refer to.
 * @param {Window} win The window of the dragged element.
 * @returns {{ top: number; bottom: number }} The top and bottom edges on screen.
 */
export declare function getVisibleViewportBounds(win: Window): {
  top: number;
  bottom: number;
};
export interface DragPreview {
  element: HTMLElement;
  /**
   * Moves the preview so it keeps its offset from the pointer.
   * @param {number} clientX The horizontal pointer position.
   * @param {number} clientY The vertical pointer position.
   */
  move: (clientX: number, clientY: number) => void;
  remove: () => void;
}
/**
 * Creates a copy of `source` that follows the pointer, in place of the drag image of HTML drag and drop.
 * The copy keeps the look of the source, but not its identity: ids, roles, `tabindex`, `aria-*` and `data-*`
 * attributes are removed, and it's `inert`, hidden from assistive technologies, and transparent to hit-testing.
 * @param {HTMLElement} source The element to copy, for example the drag handle.
 * @param {object} options The preview options.
 * @param {HTMLElement} options.container A positioned element to render the preview in.
 * @param {number} options.clientX The horizontal pointer position when the drag started.
 * @param {number} options.clientY The vertical pointer position when the drag started.
 * @param {string} options.className Space-separated classes to add to the preview.
 * @returns {DragPreview} The preview, already rendered at the pointer position.
 */
export declare function createDragPreview(source: HTMLElement, options: {
  container: HTMLElement;
  clientX: number;
  clientY: number;
  className?: string;
}): DragPreview;