interface InitIndexParams {
    scrollIndex: number;
    dataLength: number;
    lineHeight: number;
    height: number;
}
export declare function getVirtualScrollCurrentIndex(params: InitIndexParams): number;
interface ComputedScrollParams {
    dataLength: number;
    lineHeight: number;
    height: number;
    currentIndex: number;
}
export declare function computeScroll(params: ComputedScrollParams): {
    scrollTop: number;
    scrollTopRatio: number;
};
export {};