'wheelDelta' Syntax and Note : wheelDelta « Javascript Properties « JavaScript Reference

1. JavaScript Reference
2. Javascript Properties
3. wheelDelta

'wheelDelta' Syntax and Note

Note:

Read-only property. 
Returns a value of 
   120  if the mouse wheel is rotated up 
   -120 if it is rotated down.
    
Syntax:
    
window.event.wheelDelta

    

      
      

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