<html>
<head>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.7.1/jquery.min.js"></script>
</head>
<body>
<p id="demo">Change the style of an HTML element.</p>
<script>
$(document).ready(function() {
$("#demo").css("font-size","35px");
});
</script>
</body>
</html>