JavaScript can change styles
<!DOCTYPE html>
<html>
<body>
<h2>What Can JavaScript Do?</h2>
<p id="Zaki" fontsize='12px'>Hello Zaki</p>
<button type="button" onClick="document.getElementById('Zaki').style.fontSize='8px'">
Click to Redcue
</button>
</body>
</html>
where to put codes
<!doctype html>
<html>
<head>
<script>
function myFunction(){
document.getElementById('demo').innerHTML="paragraph changed.";
}
</script>
</head>
<body>
<h2> javascript in head</h2>
<p id="demo">A Paragraph</p>
<button type="button" onClick="myFunction()">
Try It
</button>
</body>
<footer>
</footer>
</html>
