border-bottom | CSS CSS Properties

The shorthand to define width, style, and color for just the bottom edge of an element. It's the standard way to create underlines, dividers, and bottom-aligned accents.

Quick example

h2 {
  /* border-bottom-width | border-bottom-style | border-bottom-color */
  border-bottom: 2px solid #e2e8f0;
  padding-bottom: 0.5rem;
  margin-bottom: 1rem;
}

Quick facts

Initial value

See individual properties

Inherited

Applies to

all elements

border-bottom Browser Support

Widely available Since 2015 96% global usage

This feature is well established and works across many devices and browser versions. It has been available across browsers since 2015.

Safe to use without fallbacks.

View on caniuse.com → View on MDN → View on webstatus.dev → Learn more about Baseline →

12+