overlayscrollbars/styles/overlayscrollbars.css

A javascript scrollbar plugin that hides the native scrollbars, provides custom styleable overlay scrollbars, and preserves the native functionality and feel.

/*! 
 * OverlayScrollbars
 * Version: 2.11.3
 * 
 * Copyright (c) Rene Haas | KingSora.
 * https://github.com/KingSora
 * 
 * Released under the MIT license.
 */
.os-size-observer,
.os-size-observer-listener {
  scroll-behavior: auto !important;
  direction: inherit;
  pointer-events: none;
  overflow: hidden;
  visibility: hidden;
  box-sizing: border-box;
}

.os-size-observer,
.os-size-observer-listener,
.os-size-observer-listener-item,
.os-size-observer-listener-item-final {
  writing-mode: horizontal-tb;
  position: absolute;
  left: 0;
  top: 0;
}

.os-size-observer {
  z-index: -1;
  contain: strict;
  display: flex;
  flex-direction: row;
  flex-wrap: nowrap;
  padding: inherit;
  border: inherit;
  box-sizing: inherit;
  margin: -133px;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  transform: scale(0.1);
}
.os-size-observer::before {
  content: "";
  flex: none;
  box-sizing: inherit;
  padding: 10px;
  width: 10px;
  height: 10px;
}

.os-size-observer-appear {
  animation: os-size-observer-appear-animation 1ms forwards;
}

.os-size-observer-listener {
  box-sizing: border-box;
  position: relative;
  flex: auto;
  padding: inherit;
  border: inherit;
  margin: -133px;
  transform: scale(calc(1 / 0.1));
}
.os-size-observer-listener.ltr {
  margin-right: -266px;
  margin-left: 0;
}
.os-size-observer-listener.rtl {
  margin-left: -266px;
  margin-right: 0;
}
.os-size-observer-listener:empty::before {
  content: "";
  width: 100%;
  height: 100%;
}
.os-size-observer-listener:empty::before, .os-size-observer-listener > .os-size-observer-listener-item {
  display: block;
  position: relative;
  padding: inherit;
  border: inherit;
  box-sizing: content-box;
  flex: auto;
}

.os-size-observer-listener-scroll {
  box-sizing: border-box;
  display: flex;
}

.os-size-observer-listener-item {
  right: 0;
  bottom: 0;
  overflow: hidden;
  direction: ltr;
  flex: none;
}

.os-size-observer-listener-item-final {
  transition: none;
}

@keyframes os-size-observer-appear-animation {
  from {
    cursor: auto;
  }
  to {
    cursor: none;
  }
}
.os-trinsic-observer {
  flex: none;
  box-sizing: border-box;
  position: relative;
  max-width: 0px;
  max-height: 1px;
  padding: 0;
  margin: 0;
  border: none;
  overflow: hidden;
  z-index: -1;
  height: 0;
  top: calc(100% + 1px);
  contain: strict;
}
.os-trinsic-observer:not(:empty) {
  height: calc(100% + 1px);
  top: -1px;
}
.os-trinsic-observer:not(:empty) > .os-size-observer {
  width: 1000%;
  height: 1000%;
  min-height: 1px;
  min-width: 1px;
}

/**
 * hide native scrollbars
 * changes to this styles need to be reflected in the environment styles to correctly detect scrollbar hiding
 */
[data-overlayscrollbars-initialize]:not([data-overlayscrollbars-viewport]),
[data-overlayscrollbars-viewport~=scrollbarHidden] {
  scrollbar-width: none !important;
}

[data-overlayscrollbars-initialize]:not([data-overlayscrollbars-viewport])::-webkit-scrollbar,
[data-overlayscrollbars-initialize]:not([data-overlayscrollbars-viewport])::-webkit-scrollbar-corner,
[data-overlayscrollbars-viewport~=scrollbarHidden]::-webkit-scrollbar,
[data-overlayscrollbars-viewport~=scrollbarHidden]::-webkit-scrollbar-corner {
  -webkit-appearance: none !important;
          appearance: none !important;
  display: none !important;
  width: 0 !important;
  height: 0 !important;
}

[data-overlayscrollbars-initialize]:not([data-overlayscrollbars]):not(html):not(body) {
  overflow: auto;
}

/**
 * body element
 */
html[data-overlayscrollbars-body] {
  overflow: hidden;
}

html[data-overlayscrollbars-body],
html[data-overlayscrollbars-body] > body {
  width: 100%;
  height: 100%;
  margin: 0;
}

html[data-overlayscrollbars-body] > body {
  overflow: visible;
  margin: 0;
}

/**
 * structure setup 
 */
[data-overlayscrollbars] {
  position: relative;
}

[data-overlayscrollbars~=host],
[data-overlayscrollbars-padding] {
  display: flex;
  align-items: stretch !important;
  flex-direction: row !important;
  flex-wrap: nowrap !important;
  scroll-behavior: auto !important;
}

[data-overlayscrollbars-padding],
[data-overlayscrollbars-viewport]:not([data-overlayscrollbars]) {
  box-sizing: inherit;
  position: relative;
  flex: auto;
  height: auto;
  width: 100%;
  min-width: 0;
  padding: 0;
  margin: 0;
  border: none;
  z-index: 0;
}

[data-overlayscrollbars-viewport]:not([data-overlayscrollbars]) {
  --os-vaw: 0;
  --os-vah: 0;
  outline: none;
}
[data-overlayscrollbars-viewport]:not([data-overlayscrollbars]):focus {
  outline: none;
}
[data-overlayscrollbars-viewport][data-overlayscrollbars-viewport~=arrange]::before {
  content: "";
  position: absolute;
  pointer-events: none;
  z-index: -1;
  min-width: 1px;
  min-height: 1px;
  width: var(--os-vaw);
  height: var(--os-vah);
}

/**
 * wrapper elements overflow:
 */
[data-overlayscrollbars~=host],
[data-overlayscrollbars-padding] {
  overflow: hidden !important;
}

[data-overlayscrollbars~=host][data-overlayscrollbars~=noClipping],
[data-overlayscrollbars-padding~=noClipping] {
  overflow: visible !important;
}

/**
 * viewport overflow:
 */
[data-overlayscrollbars-viewport] {
  --os-viewport-overflow-x: hidden;
  --os-viewport-overflow-y: hidden;
  overflow-x: var(--os-viewport-overflow-x);
  overflow-y: var(--os-viewport-overflow-y);
}

[data-overlayscrollbars-viewport~=overflowXVisible] {
  --os-viewport-overflow-x: visible;
}

[data-overlayscrollbars-viewport~=overflowXHidden] {
  --os-viewport-overflow-x: hidden;
}

[data-overlayscrollbars-viewport~=overflowXScroll] {
  --os-viewport-overflow-x: scroll;
}

[data-overlayscrollbars-viewport~=overflowYVisible] {
  --os-viewport-overflow-y: visible;
}

[data-overlayscrollbars-viewport~=overflowYHidden] {
  --os-viewport-overflow-y: hidden;
}

[data-overlayscrollbars-viewport~=overflowYScroll] {
  --os-viewport-overflow-y: scroll;
}

[data-overlayscrollbars-viewport~=overflowImportant] {
  overflow-x: var(--os-viewport-overflow-x) !important;
  overflow-y: var(--os-viewport-overflow-y) !important;
}

/**
 * viewport state modifiers:
 */
[data-overlayscrollbars-viewport~=noContent]:not(#osFakeId) {
  font-size: 0 !important;
  line-height: 0 !important;
}

[data-overlayscrollbars-viewport~=noContent]:not(#osFakeId)::before,
[data-overlayscrollbars-viewport~=noContent]:not(#osFakeId)::after,
[data-overlayscrollbars-viewport~=noContent]:not(#osFakeId) > * {
  display: none !important;
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
  border-width: 0 !important;
}

[data-overlayscrollbars-viewport~=measuring],
[data-overlayscrollbars-viewport~=scrolling] {
  scroll-behavior: auto !important;
  scroll-snap-type: none !important;
}

[data-overlayscrollbars-viewport~=measuring][data-overlayscrollbars-viewport~=overflowXVisible] {
  overflow-x: hidden !important;
}

[data-overlayscrollbars-viewport~=measuring][data-overlayscrollbars-viewport~=overflowYVisible] {
  overflow-y: hidden !important;
}

/**
 * content element:
 */
[data-overlayscrollbars-content] {
  box-sizing: inherit;
}

/**
 * Display contents to bridge any flickering during deferred initialization.
 */
[data-overlayscrollbars-contents]:not(#osFakeId):not([data-overlayscrollbars-padding]):not([data-overlayscrollbars-viewport]):not([data-overlayscrollbars-content]) {
  display: contents;
}

/**
 * optional & experimental grid mode
 */
[data-overlayscrollbars-grid],
[data-overlayscrollbars-grid] [data-overlayscrollbars-padding] {
  display: grid;
  grid-template: 1fr/1fr;
}

[data-overlayscrollbars-grid] > [data-overlayscrollbars-padding],
[data-overlayscrollbars-grid] > [data-overlayscrollbars-viewport],
[data-overlayscrollbars-grid] > [data-overlayscrollbars-padding] > [data-overlayscrollbars-viewport] {
  height: auto !important;
  width: auto !important;
}

@property --os-scroll-percent {
  syntax: "<number>";
  inherits: true;
  initial-value: 0;
}
@property --os-viewport-percent {
  syntax: "<number>";
  inherits: true;
  initial-value: 0;
}
.os-scrollbar {
  --os-viewport-percent: 0;
  --os-scroll-percent: 0;
  --os-scroll-direction: 0;
  --os-scroll-percent-directional: calc(
    var(--os-scroll-percent) - (var(--os-scroll-percent) + (1 - var(--os-scroll-percent)) * -1) *
      var(--os-scroll-direction)
  );
}

.os-scrollbar {
  contain: size layout;
  contain: size layout style;
  transition: opacity 0.15s, visibility 0.15s, top 0.15s, right 0.15s, bottom 0.15s, left 0.15s;
  pointer-events: none;
  position: absolute;
  opacity: 0;
  visibility: hidden;
}

body > .os-scrollbar {
  position: fixed;
  z-index: 99999;
}

.os-scrollbar-transitionless {
  transition: none !important;
}

.os-scrollbar-track {
  position: relative;
  padding: 0 !important;
  border: none !important;
}

.os-scrollbar-handle {
  position: absolute;
}

.os-scrollbar-track,
.os-scrollbar-handle {
  pointer-events: none;
  width: 100%;
  height: 100%;
}

.os-scrollbar.os-scrollbar-track-interactive .os-scrollbar-track,
.os-scrollbar.os-scrollbar-handle-interactive .os-scrollbar-handle {
  pointer-events: auto;
  touch-action: none;
}

.os-scrollbar-horizontal {
  bottom: 0;
  left: 0;
}

.os-scrollbar-vertical {
  top: 0;
  right: 0;
}

.os-scrollbar-rtl.os-scrollbar-horizontal {
  right: 0;
}

.os-scrollbar-rtl.os-scrollbar-vertical {
  right: auto;
  left: 0;
}

.os-scrollbar-visible {
  opacity: 1;
  visibility: visible;
}

.os-scrollbar-auto-hide.os-scrollbar-auto-hide-hidden {
  opacity: 0;
  visibility: hidden;
}

.os-scrollbar-interaction.os-scrollbar-visible {
  opacity: 1;
  visibility: visible;
}

.os-scrollbar-unusable,
.os-scrollbar-unusable *,
.os-scrollbar-wheel,
.os-scrollbar-wheel * {
  pointer-events: none !important;
}

.os-scrollbar-unusable .os-scrollbar-handle {
  opacity: 0 !important;
  transition: none !important;
}

.os-scrollbar-horizontal .os-scrollbar-handle {
  bottom: 0;
  left: calc(var(--os-scroll-percent-directional) * 100%);
  transform: translateX(calc(var(--os-scroll-percent-directional) * -100%));
  width: calc(var(--os-viewport-percent) * 100%);
}

.os-scrollbar-vertical .os-scrollbar-handle {
  right: 0;
  top: calc(var(--os-scroll-percent-directional) * 100%);
  transform: translateY(calc(var(--os-scroll-percent-directional) * -100%));
  height: calc(var(--os-viewport-percent) * 100%);
}

@supports (container-type: size) {
  .os-scrollbar-track {
    container-type: size;
  }
  .os-scrollbar-horizontal .os-scrollbar-handle {
    left: auto;
    transform: translateX(calc(var(--os-scroll-percent-directional) * 100cqw + var(--os-scroll-percent-directional) * -100%));
  }
  .os-scrollbar-vertical .os-scrollbar-handle {
    top: auto;
    transform: translateY(calc(var(--os-scroll-percent-directional) * 100cqh + var(--os-scroll-percent-directional) * -100%));
  }
  .os-scrollbar-rtl.os-scrollbar-horizontal .os-scrollbar-handle {
    right: auto;
    left: 0;
  }
}
.os-scrollbar-rtl.os-scrollbar-vertical .os-scrollbar-handle {
  right: auto;
  left: 0;
}

.os-scrollbar.os-scrollbar-horizontal.os-scrollbar-cornerless,
.os-scrollbar.os-scrollbar-horizontal.os-scrollbar-cornerless.os-scrollbar-rtl {
  left: 0;
  right: 0;
}

.os-scrollbar.os-scrollbar-vertical.os-scrollbar-cornerless,
.os-scrollbar.os-scrollbar-vertical.os-scrollbar-cornerless.os-scrollbar-rtl {
  top: 0;
  bottom: 0;
}

@media print {
  .os-scrollbar {
    display: none;
  }
}
.os-scrollbar {
  --os-size: 0;
  --os-padding-perpendicular: 0;
  --os-padding-axis: 0;
  --os-track-border-radius: 0;
  --os-track-bg: none;
  --os-track-bg-hover: none;
  --os-track-bg-active: none;
  --os-track-border: none;
  --os-track-border-hover: none;
  --os-track-border-active: none;
  --os-handle-border-radius: 0;
  --os-handle-bg: none;
  --os-handle-bg-hover: none;
  --os-handle-bg-active: none;
  --os-handle-border: none;
  --os-handle-border-hover: none;
  --os-handle-border-active: none;
  --os-handle-min-size: 33px;
  --os-handle-max-size: none;
  --os-handle-perpendicular-size: 100%;
  --os-handle-perpendicular-size-hover: 100%;
  --os-handle-perpendicular-size-active: 100%;
  --os-handle-interactive-area-offset: 0;
}

.os-scrollbar-track {
  border: var(--os-track-border);
  border-radius: var(--os-track-border-radius);
  background: var(--os-track-bg);
  transition: opacity 0.15s, background-color 0.15s, border-color 0.15s;
}
.os-scrollbar-track:hover {
  border: var(--os-track-border-hover);
  background: var(--os-track-bg-hover);
}
.os-scrollbar-track:active {
  border: var(--os-track-border-active);
  background: var(--os-track-bg-active);
}

.os-scrollbar-handle {
  border: var(--os-handle-border);
  border-radius: var(--os-handle-border-radius);
  background: var(--os-handle-bg);
}
.os-scrollbar-handle:hover {
  border: var(--os-handle-border-hover);
  background: var(--os-handle-bg-hover);
}
.os-scrollbar-handle:active {
  border: var(--os-handle-border-active);
  background: var(--os-handle-bg-active);
}

.os-scrollbar-track:before,
.os-scrollbar-handle:before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  bottom: 0;
  display: block;
}

.os-scrollbar-horizontal {
  padding: var(--os-padding-perpendicular) var(--os-padding-axis);
  right: var(--os-size);
  height: var(--os-size);
}
.os-scrollbar-horizontal.os-scrollbar-rtl {
  left: var(--os-size);
  right: 0;
}
.os-scrollbar-horizontal .os-scrollbar-track:before {
  top: calc(var(--os-padding-perpendicular) * -1);
  bottom: calc(var(--os-padding-perpendicular) * -1);
}
.os-scrollbar-horizontal .os-scrollbar-handle {
  min-width: var(--os-handle-min-size);
  max-width: var(--os-handle-max-size);
  height: var(--os-handle-perpendicular-size);
  transition: opacity 0.15s, background-color 0.15s, border-color 0.15s, height 0.15s;
}
.os-scrollbar-horizontal .os-scrollbar-handle:before {
  top: calc((var(--os-padding-perpendicular) + var(--os-handle-interactive-area-offset)) * -1);
  bottom: calc(var(--os-padding-perpendicular) * -1);
}
.os-scrollbar-horizontal:hover .os-scrollbar-handle {
  height: var(--os-handle-perpendicular-size-hover);
}
.os-scrollbar-horizontal:active .os-scrollbar-handle {
  height: var(--os-handle-perpendicular-size-active);
}

.os-scrollbar-vertical {
  padding: var(--os-padding-axis) var(--os-padding-perpendicular);
  bottom: var(--os-size);
  width: var(--os-size);
}
.os-scrollbar-vertical .os-scrollbar-track:before {
  left: calc(var(--os-padding-perpendicular) * -1);
  right: calc(var(--os-padding-perpendicular) * -1);
}
.os-scrollbar-vertical .os-scrollbar-handle {
  min-height: var(--os-handle-min-size);
  max-height: var(--os-handle-max-size);
  width: var(--os-handle-perpendicular-size);
  transition: opacity 0.15s, background-color 0.15s, border-color 0.15s, width 0.15s;
}
.os-scrollbar-vertical .os-scrollbar-handle:before {
  left: calc((var(--os-padding-perpendicular) + var(--os-handle-interactive-area-offset)) * -1);
  right: calc(var(--os-padding-perpendicular) * -1);
}
.os-scrollbar-vertical.os-scrollbar-rtl .os-scrollbar-handle:before {
  right: calc((var(--os-padding-perpendicular) + var(--os-handle-interactive-area-offset)) * -1);
  left: calc(var(--os-padding-perpendicular) * -1);
}
.os-scrollbar-vertical:hover .os-scrollbar-handle {
  width: var(--os-handle-perpendicular-size-hover);
}
.os-scrollbar-vertical:active .os-scrollbar-handle {
  width: var(--os-handle-perpendicular-size-active);
}

/* NONE THEME: */
[data-overlayscrollbars-viewport~=measuring] > .os-scrollbar,
.os-theme-none.os-scrollbar {
  display: none !important;
}

/* DARK & LIGHT THEME: */
.os-theme-dark,
.os-theme-light {
  box-sizing: border-box;
  --os-size: 10px;
  --os-padding-perpendicular: 2px;
  --os-padding-axis: 2px;
  --os-track-border-radius: 10px;
  --os-handle-interactive-area-offset: 4px;
  --os-handle-border-radius: 10px;
}

.os-theme-dark {
  --os-handle-bg: rgba(0, 0, 0, 0.44);
  --os-handle-bg-hover: rgba(0, 0, 0, 0.55);
  --os-handle-bg-active: rgba(0, 0, 0, 0.66);
}

.os-theme-light {
  --os-handle-bg: rgba(255, 255, 255, 0.44);
  --os-handle-bg-hover: rgba(255, 255, 255, 0.55);
  --os-handle-bg-active: rgba(255, 255, 255, 0.66);
}