export declare function getDataTransfer(event: any): DataTransfer;
export declare function getEventTarget(event: any): HTMLElement;
/**
 * Note: there are issues with current TypeScript lib defs for the DataTransfer interface, which
 * seems to define the `types` property as a `string[]` rather than a DOMStringList.
 * See https://github.com/Microsoft/TypeScript/issues/12069
 */
export declare function transferHasFiles(transfer: DataTransfer): boolean;
export declare function clientReportsMimeTypesOnDrag(): boolean;
/**
 * If the browser does not report a MIME type, match against this value instead.
 */
export declare const FALLBACK_MIME_TYPE = "unknown/unknown";
/**
 * Returns a list of mime types in a DataTransfer if supported by the browser.
 *
 * This is a workaround for missing DataTransfer.items support in Firefox < 52
 * https://bugzilla.mozilla.org/show_bug.cgi?id=906420
 */
export declare function getTransferMimeTypes(transfer: DataTransfer): string[];