export declare class PageHelper {
    private static readonly body;
    private static readonly supportPageOffset;
    private static readonly isCSS1Compat;
    private static scrollLocks;
    static get ScrollY(): number;
    static set ScrollY(value: number);
    static get OverflowY(): string;
    static set OverflowY(value: string);
    static get MaxScrollY(): number;
    static get ScrollX(): number;
    static showScrollY(requester: string): void;
    static isScrollYVisible(): boolean;
    static hideScrollY(requester: string): void;
}