border-bottom-width
Controls the thickness of the bottom border. It is frequently paired with a specific color to create focus indicators or status bars.
It is documented as part of the CSS Backgrounds and Borders specification.
Syntax
/* Usage Example */
.notification-banner {
background: #f0f9ff;
/* Adds a subtle 1px line at the very bottom */
border-bottom-width: 1px;
border-bottom-style: solid;
border-bottom-color: #bae6fd;
}
/* Global values */
border-bottom-width: inherit;
border-bottom-width: initial;
border-bottom-width: revert;
border-bottom-width: revert-layer;
border-bottom-width: unset;border-bottom-width 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.
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