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<!DOCTYPE html>
<html>
<head>
<style>
#myDIV {
  border: 1px solid black;
}
</style>
</head>
<body>
<div id="myDIV" onwheel="myFunction()">This example demonstrates how to assign an "onwheel" event event to a DIV element. Roll the mouse wheel over me - either up or down!</div>
<p>A function is triggered when you roll the mouse wheel over div. The function sets the font-size of div to 35 pixels.</p>
<p><strong>Note:</strong> The onwheel event is not supported in Internet Explorer or Safari.</p>
<script>
function myFunction() {
  document.getElementById("myDIV").style.fontSize = "35px";
}
</script>
</body>
</html>