show / hide scroll - css

global.css

/* Hide scrollbar with class .hide-scroll */
/* for Chrome, Safari and Opera */
.hide-scroll::-webkit-scrollbar {
  display: none;
  /* Hide scrollbar for IE, Edge and Firefox */
  -ms-overflow-style: none; /* IE and Edge */
  scrollbar-width: none; /* Firefox */
}

/* Always show scrollbar with class .always-show-scroll */
/* show scrollbar -- https://stackoverflow.com/a/10100209 */
.always-show-scroll::-webkit-scrollbar {
  -webkit-appearance: none;
  width: 7px;
}
.always-show-scroll::-webkit-scrollbar-thumb {
  border-radius: 4px;
  background-color: rgba(0, 0, 0, 0.5);
  box-shadow: 0 0 1px rgba(255, 255, 255, 0.5);
}