html, body {
    width: 100%;
    height: 100%;
} 
.slideout-menu {
    position: fixed;
    /*   left: 0; */
    top: 0;
    bottom: 0;
    right: 0;
    z-index: 0;
    width: 256px;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    display: none;
}
.slideout-panel {
    height: 100%;
    position:relative;
    z-index: 1;
    will-change: transform;
}
.noscroll .slideout-panel {
    will-change: initial;
}
.slideout-open,
.slideout-open body,
.slideout-open .slideout-panel {
    overflow: hidden;
}
.slideout-open .slideout-menu {
    display: block;
}