jQUERY - AJAX

HTML

<!DOCTYPE html>
<html>
<head>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.4.1/jquery.min.js"></script>
<script>
$(document).ready(function(){
  $("button").click(function(){
    $("#div1").load('https://www.voxcafe.cz/demo_test.txt #p1');
  });
});
</script>
</head>
<body>

<div id="div1"><h2>jQuery AJAX změní tento text</h2></div>

<button>Načti externí obsah</button>

</body>
</html>