export class DataTransferItem {
  asString(): Thenable<string>;
  readonly value: any;
  constructor(value: any);
  /**
   * Try getting the file associated with this data transfer item.
   *
   * Note that the file object is only valid for the scope of the drag and drop operation.
   *
   * @returns The file for the data transfer or `undefined` if the item is not a file.
   */
  asFile(): DataTransferFile | undefined;
}