Get your own website Result Size: 625 x 565
x
 
<!DOCTYPE html>
<html>
<body>
<p id="demo">Click the button to change the layout of this paragraph</p>
<button onclick="myFunction()">Click Me!</button>
<script>
function myFunction() {
  let x = document.getElementById("demo");
  x.style.fontSize = "25px"; 
  x.style.color = "red"; 
}
</script>
</body>
</html>