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<!DOCTYPE html>
<html>
<body>
​
<h1>WheelEvent deltaY Property</h1>
​
<p>Resize the DIV element by scrolling inside it:</p>
​
<div onwheel="myFunction(event)" style="width:100px;height:100px;background-color:Tomato"></div>
​
<script>
function myFunction(event) {
  var y = event.deltaY;
  var currentSize = event.target.style.width;
  if (y > 0) {
    newSize = parseInt(currentSize) + 10;
  } else {
    newSize = parseInt(currentSize) - 10;
  }
  event.target.style.width = newSize + "px";
  event.target.style.height = newSize + "px";
}
</script>
​
</body>
​
<!-- Mirrored from www.w3schools.com/jsref/tryit.asp?filename=tryjsref_event_wheel_deltay2 by HTTrack Website Copier/3.x [XR&CO'2014], Mon, 27 Jan 2020 03:03:01 GMT -->
</html>
​
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