export declare const backtopProps: {
    visibilityHeight: {
        readonly type: NumberConstructor;
        readonly default: 200;
    };
    target: {
        readonly type: StringConstructor;
        readonly default: "";
    };
    right: {
        readonly type: NumberConstructor;
        readonly default: 40;
    };
    bottom: {
        readonly type: NumberConstructor;
        readonly default: 40;
    };
};
export declare const backtopEmits: {
    click: (evt: MouseEvent) => boolean;
};
