famzil

const API_URL = "https://www.themealdb.com/api/json/v1/1/search.php?s=";

function fetchMealData() {
  let request = new XMLHttpRequest();
  request.open("GET", API_URL);
  request.send();
  request.onload = () => {
    console.log("REQUEST: ", request);
 
    if (request.status == 200) {

famzil

function get_joke_of_the_day() {
    var xhttp = new XMLHttpRequest();
    xhttp.onreadystatechange = function() {
	 if (this.readyState == 4 && this.status == 200) {
	     // Access the result here
	     alert(this.responseText);
	 }
    };
    xhttp.open("GET", "https://api.jokes.one/jod?category=animal", true);
    xhttp.setRequestHeader("Content-type", "application/json");

famzil

var data = new FormData();
data.append("image_file", fileInput.files[0], "@path/to/image");
 data.append("image_url", "url_to_image");

var xhr = new XMLHttpRequest();
xhr.withCredentials = true;

xhr.addEventListener("readystatechange", function() {
  if(this.readyState === 4) {

famzil

import { TestScheduler } from 'rxjs/testing';
import { delay, take } from 'rxjs/operators';
import { expect } from 'chai';

// Starting the test suite
describe('RxBookTracker Tests', () => {
  
  // declaring our scheduler (outside, because we will be using it in all our tests)
  let scheduler;

famzil

...


scheduler.run(helpers => {
    const source$ = helpers.cold("some produced values data");
    
    // create the expected value, whatever you are expecting to be returned by the observable
    const expected = .... ;
  
    // Tetsing: take(number) for example is a cold observable

famzil

import { TestScheduler } from 'rxjs/testing';


// Using helpers. 
scheduler.run(helpers => {
    // creating the source$ and the expected observable
    // ....

   // Testing equality
    helpers.expectObservable(source$).toBe(expected);

famzil

import { TestScheduler } from 'rxjs/testing';

// All what you can do with the helpers object
const { cold, hot, expectObservable, expectSubscriptions, flush, time, animate } = helpers;

// Test example
const expected = '400ms (a-b|)';
const values = {
  a: 'value emitted',
  b: 'another value emitted',

famzil

import { TestScheduler } from 'rxjs/testing';

let scheduler = new TestScheduler((actual, expected) => {
      // code to test
});

famzil

import './style.css';

import { of, merge, queueScheduler, asapScheduler, asyncScheduler } from 'rxjs';


console.log('Start');

let queue$ = of('QueueScheduler (synchronous)', queueScheduler);

let asap$ = of('AsapScheduler (async micro task)', asapScheduler);

famzil

function publishBehaviorDemo() {
  
  /* Create the source observabe with publishBehavior operator. */  
  let source$ = interval(1000).pipe(take(4), publishBehavior(6), refCount());

  /* First subscriber, outputs the received value with his name 'Observer 1' */
  source$.subscribe((value) => console.log(`Observer 1: ${value}`));

  /* Second subscriber after 1 second, outputs the received value with his name 'Observer 2' */
  setTimeout(() => {