import { ColdObservable } from 'rxjs';
export interface AjaxConfig {
    url: string;
    body?: unknown;
    headers?: Record<string, string>;
    async?: boolean;
    crossDomain?: boolean;
    withCredentials?: boolean;
    method?: string;
    timeout?: number;
    responseType?: XMLHttpRequestResponseType;
    user?: string;
    password?: string;
    xsrfCookieName?: string;
    xsrfHeaderName?: string;
    queryParams?: unknown;
    includeDownloadProgress?: boolean;
    includeUploadProgress?: boolean;
    createXHR?: () => XMLHttpRequest;
}
export interface AjaxRequest {
    url: string;
    body: unknown;
    headers: Record<string, string>;
    async: boolean;
    crossDomain: boolean;
    withCredentials: boolean;
    method: string;
    timeout: number;
    responseType: XMLHttpRequestResponseType;
    user?: string;
    password?: string;
    xsrfCookieName?: string;
    xsrfHeaderName?: string;
    queryParams?: unknown;
    includeDownloadProgress: boolean;
    includeUploadProgress: boolean;
}
/**
 * Creates an `XMLHttpRequest` observable that emits `AjaxResponse` values,
 * replicating the behavior of the removed `rxjs/ajax` `fromAjax` factory
 * using the Web Platform Observable (`ColdObservable`) model.
 *
 * @param {AjaxConfig} init - The request configuration.
 * @returns {ColdObservable<AjaxResponse<unknown>>} A cold observable that performs the request per subscription.
 */
export declare function fromXMLHttpRequest<T = unknown>(init: AjaxConfig): ColdObservable<AjaxResponse<T>>;
/**
 * Resolves with the last value emitted by the observable before completion.
 *
 * @template T
 * @param {Subscribable<T>} source$ - The observable to subscribe to.
 * @returns {Promise<T>} A promise that resolves with the last emitted value.
 */
export declare function lastValueFrom<T>(source$: Subscribable<T>): Promise<T>;
export declare class AjaxResponse<T = unknown> {
    originalEvent: Event;
    xhr: XMLHttpRequest;
    request: AjaxRequest;
    type: string;
    status: number;
    responseType: string;
    responseHeaders: Record<string, string>;
    response: T;
    loaded: number;
    total: number;
    constructor(originalEvent: Event, xhr: XMLHttpRequest, request: AjaxRequest, type?: string);
}
export declare class AjaxError extends Error {
    name: string;
    xhr: XMLHttpRequest;
    request: AjaxRequest;
    status: number;
    responseType: string;
    response: unknown;
    constructor(message: string, xhr: XMLHttpRequest, request: AjaxRequest);
}
export declare class AjaxTimeoutError extends AjaxError {
    constructor(xhr: XMLHttpRequest, request: AjaxRequest);
}