import type { Wretch, WretchAddon } from "../types.js";
export interface FormUrlAddon {
    /**
     * Converts the input parameter to an url encoded string and sets the content-type
     * header and body. If the input argument is already a string, skips the conversion
     * part.
     *
     * ```js
     * const form = { a: 1, b: { c: 2 } };
     * const alreadyEncodedForm = "a=1&b=%7B%22c%22%3A2%7D";
     *
     * // Automatically sets the content-type header to "application/x-www-form-urlencoded"
     * wretch("...").addon(FormUrlAddon).formUrl(form).post();
     * wretch("...").addon(FormUrlAddon).formUrl(alreadyEncodedForm).post();
     * ```
     *
     * @param input - An object to convert into an url encoded string or an already encoded string
     */
    formUrl<T extends FormUrlAddon, C, R>(this: T & Wretch<T, C, R>, input: (object | string)): this;
}
/**
 * Adds the ability to convert a an object to a FormUrl and use it as a request body.
 *
 * ```js
 * import FormUrlAddon from "wretch/addons/formUrl"
 *
 * wretch().addon(FormUrlAddon)
 * ```
 */
declare const formUrl: WretchAddon<FormUrlAddon>;
export default formUrl;