Count the number of times the scroll is used for an element:
The scroll event occurs when the user scrolls in the specified element.
The scroll event works for all scrollable elements and the window object (browser window).
The scroll() method triggers the scroll event, or attaches a function to run when a scroll event occurs.
Trigger the scroll event for the selected elements:
Attach a function to the scroll event:
|function||Optional. Specifies the function to run when the scroll event is triggered|
Toggle between classes on different scroll positions
How to toggle between classes on different scroll positions.