This feature is no longer recommended. Though some browsers might still support it, it may have already been removed from the relevant web standards, may be in the process of being dropped, or may only be kept for compatibility purposes. Avoid using it, and update existing code if possible; see the compatibility table at the bottom of this page to guide your decision. Be aware that this feature may cease to work at any time.
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.
MozMousePixelScroll event is fired asynchronously when a mouse wheel or similar device is operated. It's represented by the
If you want to prevent the default action of mouse wheel events on Gecko 17 (Firefox 17) or later, you need to call
wheel because if two or more
wheel events caused only 1 pixel scroll, this event wouldn't be fired.
wheel event if available.
Positive value indicates scroll to bottom. Negative value indicates scroll to top.
detail value indicates the scroll amount in pixels to scroll.
Trusted events are never fired with
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.
No compatibility data found. Please contribute data for "api.Element.mozmousepixelscroll" (depth: 1) to the MDN compatibility data repository.
- Gecko's legacy line or page scroll event:
- Non-Gecko browsers' legacy mouse wheel event:
- Standardized wheel event: