JSFiddle - React, Tailwind, and code Playground

HTML

<link rel="stylesheet" href="http://ajax.googleapis.com/ajax/libs/jqueryui/1.8/themes/dot-luv/jquery-ui.css">
<input type="button" name="bttnLoadQR" value="Button" onClick='
$.post( "https://providers.cloudsoftphone.com/lib/prettyqr/createQR.php", 
{ user: "123", pass: "321", cloudid: "test", format: "png" },
function(data){
alert(data);
  $("#result").html(data);
});
'>
<div id="result">Nothing</div>