import { EventEmitter } from '../../stencil-public-runtime';
/**
 * @slot default - Child content of the component.
 */
export declare class NvTableheader {
    /****************************************************************************/
    /**
     * Will render the header as sortable with the corresponding icon button.
     * Allows the header to be tabbed, and trigger sorting via click or keyboard
     * navigation
     */
    readonly sortable: boolean;
    /**
     * The current sort direction of the header. Will be 'none' if the header is
     * not sortable or if the sort direction is not set.
     */
    sortDirection: 'none' | 'asc' | 'desc';
    /****************************************************************************/
    private cycleSortDirection;
    private handleKeyDown;
    get ariaSort(): "none" | "ascending" | "descending";
    /****************************************************************************/
    /****************************************************************************/
    /****************************************************************************/
    /**
     * Event emitted when the sort direction changes. Payload is the new sort
     * direction.
     */
    sortDirectionChanged: EventEmitter<string>;
    /****************************************************************************/
    render(): any;
}