import type { SortParams } from './types';
export declare function isSortColumnAvailable(sortParams: SortParams | undefined, columns: Array<{
    name: string;
}>): boolean;
export declare function rafThrottle<Fn extends (...args: any[]) => any>(fn: Fn): (...args: Parameters<Fn>) => void;
export declare function calculateColumnWidth(newWidth: number, minWidth?: number, maxWidth?: number): number;
export declare const typedMemo: <T>(Component: T) => T;
/**
 * Computes the current vertical offset of a table element relative to a scrollable container.
 * Uses DOMRects to calculate the distance from the table's top edge to the container's top edge
 * in container scroll coordinates: tableRect.top - containerRect.top + container.scrollTop.
 * @param container The scrollable container element
 * @param table The table (or table wrapper) element whose offset is calculated
 * @returns The vertical offset in pixels
 */
export declare function getCurrentTableOffset(container: HTMLElement, table: HTMLElement): number;
/**
 * Returns whether a table is considered offscreen relative to the container's viewport
 * with an additional safety margin (freeze margin).
 * A table is offscreen if its vertical span [tableStartY, tableEndY] lies farther than
 * the specified margin outside the viewport [scrollTop, scrollTop + clientHeight].
 * @param params The parameters for the offscreen check
 * @param params.container The scrollable container element
 * @param params.currentTableOffset The current vertical offset of the table within the container
 * @param params.totalItems Total number of rows in the table
 * @param params.rowHeight Fixed row height in pixels
 * @param params.freezeMarginPx Optional additional margin in pixels; defaults to container.clientHeight
 * @returns True if the table is offscreen beyond the margin; otherwise false
 */
export declare function isTableOffscreen(params: {
    container: HTMLElement;
    currentTableOffset: number;
    totalItems: number;
    rowHeight: number;
    freezeMarginPx?: number;
}): boolean;