#app-sidebar { position: fixed !important; } #app-content { width: $navigation-width !important; /** * set min height so the container will grow in IE11 * https://stackoverflow.com/questions/28627879/flexbox-not-filling-height-in-ie11 */ min-height: calc(100vh - 50px); } #app-sidebar.disappear { right: -$sidebar-max-width !important; }