/**
 * @file （垂直）滚动条相关逻辑
 * @desc fixHead: true 时需要滚动条宽度信息以正确地对齐 head & body
 */
import React, { ReactNode } from 'react';
export declare type ScrollBarContextValue = {
    /** 单位 px */
    width: number;
    setScrollContainer: (el: HTMLElement | null) => void;
};
export declare function useScrollBar(): ScrollBarContextValue;
export declare function ScrollBarProvider({ children }: {
    children: ReactNode;
}): React.JSX.Element;