type Key<T> = T | (() => T | null);
export type StateType<T, D> = {
    /**
     * 请求成功的次数
     */
    requestCount: number;
    /**
     * loader第一次请求数据时的加载状态
     */
    isLoading: boolean;
    /**
     * loader请求数据时的加载状态
     */
    isValidating: boolean;
    data?: D;
    error?: any;
    mutate: (newData: D) => void;
    refresh: (params?: T, resetLoading?: boolean) => Promise<D>;
};
export type LoaderOptions<T, D> = {
    defaultData?: D;
    onError?: (error: any) => void;
    onSuccess?: (data: D, params?: T) => void;
};
export type Fetcher<T, D> = (params: T) => (D | Promise<D>);
/**
 * @deprecated 业务代码使用 query 库的 useQuery
 */
export declare const useLoader: <T = any, D = any>(key: Key<T>, fetcher: Fetcher<T, D>, options?: LoaderOptions<T, D>) => {
    readonly requestCount: number;
    readonly isLoading: boolean;
    readonly isValidating: boolean;
    readonly data?: import('vue').DeepReadonly<import('vue').UnwrapRef<import('vue').UnwrapRef<D>>> | undefined;
    readonly error?: any;
    readonly mutate: (newData: D) => void;
    readonly refresh: (params?: T | undefined, resetLoading?: boolean) => Promise<D>;
};
export {};