/**
 * Fetches JSON data from a specified URI.
 * URI:s starting with `/rest-api`, `/appresource`, `/edit-app-config` or a protocol, for example
 * `https://` will be left as is. Other URI:s willbe converted to match a route in the current app
 * with `getRouteUri`.
 *
 * @template T
 * @param {string} uri - The URI to fetch JSON data from.
 * @param {Options} [options] - The options for the fetch request with some extensions.
 * @returns {Promise<T>} A promise that resolves to the JSON response.
 * @throws {FetchError} If the response is not successful or cannot be parsed as JSON.
 */
export default function fetchJson<T>(uri: string, options?: Options): Promise<T>;
/**
 * @typedef {Object} ExtensionOptions
 * @property {{ [key: string]: unknown }} [params] - The parameters to be included in the request
 * URL.
 * @property {number} [retries=0] - The number of retries to attempt in case of a timeout error.
 *
 * @typedef {RequestInit & ExtensionOptions} Options
 */
/**
 * Custom error class for fetch-related errors with additional HTTP context.
 */
export class FetchError extends Error {
    /**
     * @param {string} message - The error message.
     * @param {Object} [options] - Error options.
     * @param {number} [options.status] - HTTP status code.
     * @param {boolean} [options.aborted=false] - Whether the request was aborted.
     * @param {Object.<string, unknown>} [options.additionalProps] - Additional properties.
     */
    constructor(message: string, { status, aborted, ...additionalProps }?: {
        status?: number;
        aborted?: boolean;
        additionalProps?: {
            [x: string]: unknown;
        };
    });
    status: number;
    aborted: boolean;
}
export type ExtensionOptions = {
    /**
     * - The parameters to be included in the request
     * URL.
     */
    params?: {
        [key: string]: unknown;
    };
    /**
     * - The number of retries to attempt in case of a timeout error.
     */
    retries?: number;
};
export type Options = RequestInit & ExtensionOptions;