This feature is non-standard and is not on a standards track. Do not use it on production sites facing the Web: it will not work for every user. There may also be large incompatibilities between implementations and the behavior may change in the future.

The DOM MozMousePixelScroll event is fired asynchronously when a mouse wheel or similar device is operated. It's represented by the MouseScrollEvent interface.

If you want to prevent the default action of mouse wheel events on Gecko 17 (Firefox 17) or later, you need to call preventDefault() of wheel because if two or more wheel events caused only 1 pixel scroll, this event wouldn't be fired.

Use standardized wheel event if available.

detail value

Positive value indicates scroll to bottom. Negative value indicates scroll to top.

The detail value indicates the scroll amount in pixels to scroll.

Trusted events are never fired with 0.

If native mouse wheel event indicates the scroll amount in lines or pages, the value is computed with the line height or page width or page height of the nearest ancestor scrollable element from the event target.

Browser compatibility

We're converting our compatibility data into a machine-readable JSON format. This compatibility table still uses the old format, because we haven't yet converted the data it contains. Find out how you can help!

Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari
Basic support No support 3.5 (1.9.1) No support No support No support
Feature Android Firefox Mobile (Gecko) IE Mobile Opera Mobile Safari Mobile
Basic support No support 1.0 (1.9.1) No support No support No support

See also

  • MouseScrollEvent
  • Gecko's legacy line or page scroll event: DOMMouseScroll
  • Non-Gecko browsers' legacy mouse wheel event: mousewheel
  • Standardized wheel event: wheel

Document Tags and Contributors

Contributors to this page: fscholz, mfluehr, teoli, kscarfone, Masayuki
Last updated by: fscholz,