/*! minions.css */
.oy-a{overflow-y:auto}
.oy-h{overflow-y:hidden}
.oy-s{overflow-y:scroll}
.oy-v{overflow-y:visible}
npm install minions.overflow-y
<link rel="stylesheet" href="https://unpkg.com/minions.overflow-y" />
The MIT License (MIT)
Copyright (c) 2016 Michael Chan