Is it good for user to auto-hide scroll?

1. Are scrollbars necessary?
2. Can you hide scrollbar?
3. How do I hide the scroll bar for inactivity?

Are scrollbars necessary?

A scrollbar is needed in instances where there are a lot of items in a dropdown menu. The general rule is that only 6 to 10 items should be visible in the dropdown.

Can you hide scrollbar?

To hide the scrollbar in WebKit-based browsers, you have to use the ::-webkit-scrollbar pseudo selector. ::-webkit-scrollbar is a pseudo-element in CSS used by developers to modify the look of a browser's scrollbar. With the ::-webkit-scrollbar pseudo selector, there's a wide range of things you can do to a scrollbar.

How do I hide the scroll bar for inactivity?

Approach: The onscroll event is used to disable the scroll bar. The onscroll event acts as soon as the page is scrolled. So, setTimeout() method is used to provide a delay to hide the scroll bar, so that we are able to scroll down first.