JSFiddle - React, Tailwind, and code Playground

by Yuriy Petrichenko

HTML

<h1>
  Js Advanced: Ajax
</h1>

<button>Change conte</button>

JavaScript

function req() {
	const xhr = new XMLHttpRequest();
	xhr.onreadystatechange = () => {
  	if(this.readyState == 4 && this.statusCode === 400) {
    	  console.log(this.responseText);
    }
  }
  xhr.open('GET','https://www.w3schools.com/xml/ajax_info.txt')
}
req();