Flex Basis

Set the initial size for flex items.

Widely available

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

Chrome

Edge

Firefox

Safari

Usage

<div class="c-white">
  <div class="d-f g-4 h-24 w-full">
    <div class="d-f ai-c fb-0 jc-c p-4 bg-indigo">A</div>
    <div class="d-f ai-c fb-50 jc-c p-4 bg-indigo">B</div>
    <div class="d-f ai-c fb-full jc-c p-4 bg-indigo">C</div>
  </div>
</div>

Responsiveness

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

Target viewport sizes with breakpoint prefixes.

sm:fb-*

Small≥640px

md:fb-*

Medium≥768px

lg:fb-*

Large≥1024px

xxl:fb-*

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:fb-*

Negative Values

Use negative variants to apply negative flex basis values.

Use the -- syntax to apply negative numeric values.