Border Block Width

Set the vertical border width for an element.

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

Chrome

Edge

Firefox

Safari

Usage

Control an element's vertical border width. This utility sets both the top & bottom border widths.

<div class="d-f fd-r">
  <div class="d-f ai-c jc-c w-16 h-16 bc-indigo bs-s byw-4"></div>
</div>

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

Target viewport sizes with breakpoint prefixes.

sm:byw-*

Small≥640px

md:byw-*

Medium≥768px

lg:byw-*

Large≥1024px

xxl:byw-*

Extra Large≥1536px

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:byw-*

Use negative variants to apply negative border widths.

Use the -- syntax to apply negative numeric values.

Syntax:byw--*