.slideout-menu {
    position: fixed;
    left: 0;
    top: 0;
    bottom: 0;
    right: 0;
    z-index: 0;
    width: 256px;
    overflow-y: scroll;
    -webkit-overflow-scrolling: touch;
    display: none;
  }

  .slideout-panel {
    position: relative;
    z-index: 1;
    will-change: transform;
  }

  .slideout-open,
  .slideout-open body,
  .slideout-open .slideout-panel {
    overflow: hidden;
  }

  .slideout-open .slideout-menu {
    display: block;
  }