Board Thread:General Discussion/@comment-28464583-20180823215750/@comment-9605025-20180823231119

CSS does not provide an official specification for altering the scrollbars; so anything you do will not be consistent across browsers. However, Webkit browsers such as Chrome and Safari can handle it through Webkit-only pseudo elements. There are also some Microsoft-only properties you can use but they only work with certain versions of Internet Explorer.