import type { MaybeRef } from "@vueuse/core";
import type { Ref } from "vue";
export interface SizeOptions {
    width: string | number | undefined;
    height: string | number | undefined;
    ratio: string | number | undefined;
}
export interface SizeInfo<E extends HTMLElement> {
    el: Ref<E | undefined>;
    width: Ref<string>;
    height: Ref<string>;
}
export declare const useSize: <E extends HTMLElement>(options: SizeOptions, extraHeight?: MaybeRef<number>) => SizeInfo<E>;