/**
 * 支持的 HTTP 请求方法
 */
export type HttpMethod = 'GET' | 'POST';
/**
 * 请求配置项
 */
export interface XhrOptions {
    /** 请求方法，默认 'GET' */
    method?: HttpMethod;
    /** 请求头 (Key-Value) */
    headers?: Record<string, string>;
    /** 请求体 (普通对象会被自动序列化为 JSON) */
    body?: any;
    /**
     * 查询参数 (普通对象会被自动序列化为 URLSearchParams)
     * */
    params?: Record<string, string>;
    /** 是否携带 cookies 和跨域认证信息 */
    withCredentials?: boolean;
    /** 超时时间（毫秒），默认 20000 */
    timeout?: number;
    /** 响应类型，决定返回值的解析方式 */
    responseType?: XMLHttpRequestResponseType;
    /** 上传/下载进度回调 */
    onProgress?: (event: ProgressEvent) => void;
}
/**
 * 请求的响应内容
 */
export interface XhrResponse<T> {
    code: number;
    message: string;
    ttl: number;
    data: T;
}
/**
 * 主函数：发起 XMLHttpRequest 请求
 */
export declare function xhrRequest<T = any>(url: string, options?: XhrOptions): Promise<XhrResponse<T>>;
export declare namespace xhrRequest {
    var get: RequestHelper;
    var getWithCredentials: RequestHelperWithAuth;
    var post: RequestHelper;
    var postWithCredentials: RequestHelperWithAuth;
}
type RequestHelper = <T = any>(url: string, options?: Omit<XhrOptions, 'method'>) => Promise<XhrResponse<T>>;
type RequestHelperWithAuth = <T = any>(url: string, options?: Omit<XhrOptions, 'method' | 'withCredentials'>) => Promise<XhrResponse<T>>;
export {};