HTML Code

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>migrate to wheel</title>
  <style>
    #box { height: 160px; overflow: auto; border: 2px solid #333; padding: 12px; }
    #box p { height: 400px; margin: 0; }
  </style>
</head>
<body>
  <p>Modern browsers take the <code>wheel</code> path.</p>
  <div id="box"><p>Scroll me with the mouse wheel.</p></div>
  <pre id="out">(waiting)</pre>
  <script>
    var box = document.getElementById("box");
    var out = document.getElementById("out");
    function onScrollGesture(event, source) {
      if (source === "wheel") {
        out.textContent = "wheel dy=" + event.deltaY;
        return;
      }
      out.textContent = "MozMousePixelScroll detail=" + event.detail;
    }
    box.addEventListener("wheel", function (event) {
      onScrollGesture(event, "wheel");
    });
    box.addEventListener("MozMousePixelScroll", function (event) {
      onScrollGesture(event, "MozMousePixelScroll");
    });
  </script>
</body>
</html>

Lines: 0 | Characters: 0

Live Preview Auto-refresh on Run

Element MozMousePixelScroll — migrate to wheel (Try It)