New to Js, how do i get the value of this request?

Question

Sorry if I've worded this badly, but I have some lines of js:

 var client = new XMLHttpRequest(); client.open('GET', '/test.txt'); client.onloadend = function() { alert(client.responseText); } client.send(); var x = document.getElementById("demo").innerHTML = x;

 <div id="demo"></div>

How can I make var x = the value of the alert box?

Answer 1

 var client = new XMLHttpRequest(); client.open('GET', '/test.txt'); client.onload = e => { document.getElementById("demo").innerHTML = e.target.responseText); }; client.send(); var x = document.getElementById("demo").innerHTML = x;