This is, apparently, an IE10+ only property (not sure on the caniuse views on browser specific properties)

https://msdn.microsoft.com/en-us/library/hh771902(v=vs.85).aspx

Syntax
-ms-overflow-style: auto | none | scrollbar | -ms-autohiding-scrollbar

Property values
auto (default value):

• in IE this cause the scrollbars to be present and take up space in the DOM
• Windows UI this enforces the same rules has -ms-autohiding-scrollbar

none:

• element does not display scrollbars or panning indicators
• elements can still be scrolled via touch panning, keyboard, or mouse wheel. (unlike overflow: hidden;)

scrollbar:

• element displays a classic scrollbar-type control when its content overflows.

-ms-autohiding-scrollbar:

• element displays auto-hiding scrollbars during mouse interactions and panning indicators during touch and keyboard interactions.
• Auto-hiding scrollbars overlay content, and therefore do not require extra layout space.