import * as React from 'react';
import { BsPrefixProps, BsPrefixRefForwardingComponent } from '../utils/helpers';
export type SortOrder = 'asc' | 'desc';
export interface TableSortLabelProps extends BsPrefixProps, React.HTMLAttributes<HTMLSpanElement> {
    /**
     * Handles the click event on the sort label. User is expected to pass in the sort
     * handler function that will sort the respective table column.
     *
     * @param e The click event.
     */
    onClick: (e: React.MouseEvent<HTMLSpanElement>) => void;
    /**
     * Whether sorting is currently active on the column.
     */
    active: boolean;
    /**
     * Whether the column is currently sorted by ascending ('asc') or descending ('desc') order.
     */
    direction: SortOrder;
}
export declare const TableSortLabel: BsPrefixRefForwardingComponent<'span', TableSortLabelProps>;
export default TableSortLabel;