// https://github.com/mango/slideout .slideout-menu { position: fixed; top: 0; left: 0px; bottom: 0; width: 180px; min-height: 100vh; overflow-y: hidden; -webkit-overflow-scrolling: touch; z-index: 0; display: none; } .slideout-panel { position: relative; z-index: 1; background-color: white; } .slideout-open, .slideout-open body, .slideout-open .slideout-panel { overflow: hidden; } .slideout-open .slideout-menu { display: block; }