--- /dev/null
+import { AjaxCreationMethod } from './AjaxObservable';
+/**
+ * There is an ajax operator on the Rx object.
+ *
+ * It creates an observable for an Ajax request with either a request object with
+ * url, headers, etc or a string for a URL.
+ *
+ *
+ * ## Using ajax() to fetch the response object that is being returned from API.
+ * ```ts
+ * import { ajax } from 'rxjs/ajax';
+ * import { map, catchError } from 'rxjs/operators';
+ * import { of } from 'rxjs';
+ *
+ * const obs$ = ajax(`https://api.github.com/users?per_page=5`).pipe(
+ * map(userResponse => console.log('users: ', userResponse)),
+ * catchError(error => {
+ * console.log('error: ', error);
+ * return of(error);
+ * })
+ * );
+ *
+ * ```
+ *
+ * ## Using ajax.getJSON() to fetch data from API.
+ * ```ts
+ * import { ajax } from 'rxjs/ajax';
+ * import { map, catchError } from 'rxjs/operators';
+ * import { of } from 'rxjs';
+ *
+ * const obs$ = ajax.getJSON(`https://api.github.com/users?per_page=5`).pipe(
+ * map(userResponse => console.log('users: ', userResponse)),
+ * catchError(error => {
+ * console.log('error: ', error);
+ * return of(error);
+ * })
+ * );
+ *
+ * ```
+ *
+ * ## Using ajax() with object as argument and method POST with a two seconds delay.
+ * ```ts
+ * import { ajax } from 'rxjs/ajax';
+ * import { of } from 'rxjs';
+ *
+ * const users = ajax({
+ * url: 'https://httpbin.org/delay/2',
+ * method: 'POST',
+ * headers: {
+ * 'Content-Type': 'application/json',
+ * 'rxjs-custom-header': 'Rxjs'
+ * },
+ * body: {
+ * rxjs: 'Hello World!'
+ * }
+ * }).pipe(
+ * map(response => console.log('response: ', response)),
+ * catchError(error => {
+ * console.log('error: ', error);
+ * return of(error);
+ * })
+ * );
+ *
+ * ```
+ *
+ * ## Using ajax() to fetch. An error object that is being returned from the request.
+ * ```ts
+ * import { ajax } from 'rxjs/ajax';
+ * import { map, catchError } from 'rxjs/operators';
+ * import { of } from 'rxjs';
+ *
+ * const obs$ = ajax(`https://api.github.com/404`).pipe(
+ * map(userResponse => console.log('users: ', userResponse)),
+ * catchError(error => {
+ * console.log('error: ', error);
+ * return of(error);
+ * })
+ * );
+ *
+ * ```
+ */
+export declare const ajax: AjaxCreationMethod;