Answers for "auto hiding scrollbars"

css hide scrollbar

// Sass Mixing
@mixin hideScrollbar {
  &::-webkit-scrollbar {
    width: 0 !important
  }
  -ms-overflow-style: none;
  scrollbar-width: none;
}

hide scrollbar

.your-overflow-scroll-class::-webkit-scrollbar {
  ...
  width: 0.5rem; //only hide the vertical scrollbar
  height: 0px; //only hide the horizontal scrollbar
}