import type { SetupContext } from 'vue';
import type { BackTopEmits, BackTopProps } from './props';
export declare const useBackTop: (props: BackTopProps, emit: SetupContext<BackTopEmits>['emit']) => {
    visible: import("vue").Ref<boolean, boolean>;
    handleClick: (event: MouseEvent) => void;
    backTopStyle: import("vue").ComputedRef<{
        right: string;
        bottom: string;
        zIndex: number;
    }>;
};
