import * as i0 from "@angular/core";
export declare class BackTop {
    position: number;
    showSpeed: number;
    moveSpeed: number;
    private _selector;
    ngAfterViewInit(): void;
    _onClick(): boolean;
    _onWindowScroll(): void;
    static ɵfac: i0.ɵɵFactoryDeclaration<BackTop, never>;
    static ɵcmp: i0.ɵɵComponentDeclaration<BackTop, "back-top", never, { "position": { "alias": "position"; "required": false; }; "showSpeed": { "alias": "showSpeed"; "required": false; }; "moveSpeed": { "alias": "moveSpeed"; "required": false; }; }, {}, never, never, true, never>;
}
