'onMouseWheel' Syntax and Note : onMouseWheel « Event Handlers Reference « JavaScript Reference

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JavaScript Reference » Event Handlers Reference » onMouseWheel 
'onMouseWheel' Syntax and Note

Note:
    
This event fires when the mouse wheel button rotates. 
This event is the only one that exposes the wheelDelta object property. 
wheelDelta returns a positive value when the wheel button has rotated away from the user, 
and a negative value when the wheel button has rotated toward the user.
      
      
Related examples in the same category
1. 'onMouseWheel' Example
2. 'onMouseWheel' Properties
3. 'onMouseWheel' is applied to
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