export declare const isBrowser: boolean;
/**
 * Binary search to find the first visible node
 */
export declare function findStartNode(scrollTop: number, nodePositions: number[], itemCount: number): number;
/**
 * Find the last visible node
 */
export declare function findEndNode(nodePositions: number[], startNode: number, itemCount: number, viewportHeight: number): number;
/**
 * Calculate which items should be visible based on scroll position
 */
export declare function calculateVisibleRange(scrollTop: number, containerHeight: number, itemOffsets: number[], itemsLength: number, overscan: number): {
    startIndex: number;
    endIndex: number;
};
/**
 * Calculate child positions for virtual list items
 */
export declare function calculateChildPositions(itemsLength: number, itemHeight: number | undefined, defaultHeight?: number): number[];
/**
 * Calculate total height based on child positions and item height
 */
export declare function calculateTotalHeight(childPositions: number[], itemsLength: number, itemHeight: number | undefined, defaultHeight?: number): number;
/**
 * Calculate visible range with overscan
 */
export declare function calculateVisibleNodes(firstVisibleNode: number, lastVisibleNode: number, itemsLength: number, overscan: number): {
    startNode: number;
    endNode: number;
    visibleNodeCount: number;
};
/**
 * Calculate total height and offsets for all items
 */
export declare function calculateItemPositions(itemsLength: number, itemHeight: number | undefined, measuredHeights: Map<number, number>, defaultHeight?: number): {
    totalHeight: number;
    itemOffsets: number[];
};