@reactivex/rxjs/compat/observable/dom/AjaxObservable.ts

Reactive Extensions for modern JavaScript

export { AjaxRequest, AjaxCreationMethod, ajaxGet, ajaxPost, ajaxDelete, ajaxPut, ajaxPatch, ajaxGetJSON,
  AjaxObservable, AjaxSubscriber, AjaxResponse, AjaxError, AjaxTimeoutError } from 'rxjs/internal-compatibility';