Outline Style

Set the style for an element's outline.

Widely available

This feature is well established and works across many devices and browser versions.

Chrome
Edge
Firefox
Safari

os-none
outline-style: none;
os-d
outline-style: dashed;
os-s
outline-style: solid;

Responsiveness

Use breakpoint prefixes to target different screen sizes. Styles apply from the breakpoint & up.

Target viewport sizes with breakpoint prefixes.

sm:os-*
Small≥640px
md:os-*
Medium≥768px
lg:os-*
Large≥1024px
xxl:os-*
Extra Large≥1536px

Hover State

Apply styles conditionally on hover using the h: prefix.

Add the h: prefix to apply styles only when the user hovers over the element.

Syntax:h:os-*