/**
 *
 * @param initVal 初始值
 * @description 用于生成z-index
 * @example
 * ```ts
 * const { initVal, curZIndex, nextZIndex } = useZIndex()
 * ```
 */
export default function useZIndex(initVal?: number): {
    initVal: number;
    curZIndex: import('vue').ComputedRef<number>;
    nextZIndex: () => number;
};