import type { Ref } from 'vue';
/**
 * Composable to detect if the cascader panel overflows the viewport and adjust its position.
 *
 * @param {Ref<{ el: HTMLElement }>} popoverRef - The reference to the popover component.
 * @param {Ref<{ el: HTMLElement }>} cascaderPanelRef - The reference to the cascader panel component.
 * @returns {object} An object containing a reactive property `isOverflow` that indicates whether the cascader panel overflows the viewport.
 */
export declare function useCascaderOverflow(popoverRef: Ref<{
    el: HTMLElement;
}>, cascaderPanelRef: Ref<{
    el: HTMLElement;
}>): {
    isOverflow: Ref<boolean, boolean>;
};
