/**
 * @private
 */
declare class HTTP {
    static get(url: string, query?: HTTP.Query, option?: {}): Promise<Response>;
    static post(url: string, query?: HTTP.Query, body?: HTTP.Body, option?: {}): Promise<Response>;
    static patch(url: string, query?: HTTP.Query, body?: HTTP.Body, option?: {}): Promise<Response>;
    static put(url: string, query?: HTTP.Query, body?: HTTP.Body, option?: {}): Promise<Response>;
    static delete(url: string, query?: HTTP.Query, option?: {}): Promise<Response>;
    /**
     * @summary call fetch
     *
     * <pre>
     * query = {
     *     key1: value1,
     *     key2: value2,
     * };
     * URL: url?key1=value1&key2=value2
     * </pre>
     * window.fetch();
     *
     * @private
     * @param method
     * @param url
     * @param {object} query
     * @param {object|string} body
     * @param {object} [option] second argument of window.fetch(url, [init]).
     */
    static fetch(method: string, url: string, query?: HTTP.Query, body?: HTTP.Body, option?: RequestInit): Promise<Response>;
    static isJson(mimeType: string): boolean;
}
declare namespace HTTP {
    interface Query {
        [key: string]: string | number;
    }
    type Body = object | string;
    enum METHOD {
        GET = "GET",
        POST = "POST",
        PATCH = "PATCH",
        PUT = "PUT",
        DELETE = "DELETE"
    }
    const CONTENT_TYPE = "Content-Type";
    enum RESPONSE_STATUS {
        NO_CONTENT = 204
    }
    /**
     * @private
     */
    class FetchError extends Error {
        name: string;
        url: string;
        response?: Response;
        cause?: Error;
        stack?: string;
        is_aborted: boolean;
        constructor(message: string, url: string, response?: Response, cause?: Error);
    }
}
export default HTTP;
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