Thescrollbar-width property allows the author to set the desired thickness of an element's scrollbars when they are shown.

The purpose of thescrollbar-width is to optimize the space occupied by the scrollbar on a page or element; the purpose is not related to scrollbar aesthetics. Thescrollbar-width predefined keyword values indicate to the user agent whether a normal or smaller scrollbar should be rendered. Avoid usingnone, as hiding a scrollbar negatively impactsaccessibility.

Syntax

/* Keyword values */scrollbar-width: auto;scrollbar-width: thin;scrollbar-width: none;/* Global values */scrollbar-width: inherit;scrollbar-width: initial;scrollbar-width: revert;scrollbar-width: revert-layer;scrollbar-width: unset;

Values

auto

The default scrollbar width for the platform.

thin

A thin scrollbar width variant on platforms that provide that option, or a thinner scrollbar than the default platform scrollbar width.

none

No scrollbar shown, however the element will still be scrollable.

Accessibility

Use this property with caution — settingscrollbar-width tothin ornone can make content hard or impossible to scroll if the author does not provide an alternative scrolling mechanism. While swiping gestures or mouse wheels can enable scrolling on such content, some devices have no scroll alternative.

WCAG criterion 2.1.1 (Keyboard) has been in place for a long time to advise on basic keyboard accessibility, and this should include scrolling of content areas. And introduced in WCAG 2.1, criterion 2.5.5 (Target Size) advises that touch targets should be at least 44px in width and height (although the problem is compounded on high-resolution screens; thorough testing is advised).

• MDN Understanding WCAG, Guideline 2.1 explanations
• MDN Understanding WCAG, Guideline 2.5 explanations
• Understanding Success Criterion 2.1.1 | W3C Understanding WCAG 2.1
• Understanding Success Criterion 2.5.5 | W3C Understanding WCAG 2.1

Formal definition

Formal syntax

scrollbar-width =
auto|
thin|
none

Examples

Sizing overflow scrollbars

CSS

.scroller {  width: 300px;  height: 100px;  overflow-y: scroll;  scrollbar-width: thin;}

HTML

<div>  Veggies es bonus vobis, proinde vos postulo essum magis kohlrabi welsh onion  daikon amaranth tatsoi tomatillo melon azuki bean garlic. Gumbo beet greens  corn soko endive gumbo gourd. Parsley shallot courgette tatsoi pea sprouts  fava bean collard greens dandelion okra wakame tomato. Dandelion cucumber  earthnut pea peanut soko zucchini.</div>

Result

Specifications

Browser compatibility

See also

• CSS overflow module
• CSS scrollbars styling module
• overflow
• scrollbar-gutter
• scrollbar-color