css - Why does -ms-overflow-style exist? -

when comparing -ms-overflow-style css property overflow, see little difference in terms of use case, other auto-hide scrollbar feature.

macos has feature auto-hide scrollbar. seems me delegating hidden scrollbar implementation browser instead of os kind of headache.

what reasons might microsoft have had make css property?

sources: https://msdn.microsoft.com/en-us/library/hh771902(v=vs.85).aspx https://developer.mozilla.org/en-us/docs/web/css/overflow

if don't want enable scrollbar want have ability scroll, use -ms-overflow-style or ::-webkit-scrollbar width or height 0. -ms-overflow-style equivalent ::webkit-scrollbar in case of visibility , ability scroll.