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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<style>
body {
min-height: 100vh;
margin: 0;
display: flex;
align-items: center;
justify-content: center;
}
div {
width: 105px;
height: 105px;
background: #cdf;
padding: 5px;
}
</style>
<title>Element: wheel event - Scaling_an_element_via_the_wheel - code sample</title>
</head>
<body>
<div>Scale me with your mouse wheel.</div>
<script>
function zoom(event) {
event.preventDefault();
scale += event.deltaY * -0.01;
// Restrict scale
scale = Math.min(Math.max(.125, scale), 4);
// Apply scale transform
el.style.transform = `scale(${scale})`;
}
let scale = 1;
const el = document.querySelector('div');
el.onwheel = zoom;
</script>
</body>
</html>
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