ajax

There is an ajax operator on the Rx object.

const ajax: AjaxCreationMethod;

Description

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.

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.

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.

import { ajax } from 'rxjs/ajax';
import { map, catchError } from 'rxjs/operators';
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.

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);
  })
);