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.
onwheel property returns the
onwheel event handler code on the current element.
element.onwheel = event handling code
wheel event is raised when the user scrolls the contents of a element.
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