It looks like the code is trying to scroll all the elements with class name starting with "grid-item" simultaneously when the window is scrolled. However, the current implementation doesn't seem to work as expected. One potential issue could be that the element.scrollTop property is not applicable to all elements. scrollTop is a property that's applicable only to scrollable elements such as
with a fixed height and overflow: auto property. So, if any of the elements with class name "grid-item" are not scrollable, the code will not work as expected.
To fix this issue, you can modify the code to only scroll the scrollable elements. Here's a modified code that should work:
