Box Sizing

Set the box sizing model for an element.

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

Chrome

Edge

Firefox

Safari

Usage

Exclude padding and borders from an element's total size.

Content

<div class="w-26 h-26 bs-cb p-8">
  <div class="d-f ai-c jc-c w-full h-full bg-indigo c-white">Content</div>
</div>

Include padding and borders in an element's total size.

Yumma CSS uses border-box by default. Learn more in the base styles docs.

Box

<div class="w-26 h-26 bs-bb p-8">
  <div class="d-f ai-c jc-c w-full h-full bg-indigo c-white">Box</div>
</div>

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

Target viewport sizes with breakpoint prefixes.

sm:bs-*

Small≥640px

md:bs-*

Medium≥768px

lg:bs-*

Large≥1024px

xxl:bs-*

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:bs-*