border-top
A shorthand for setting the width, style, and color of the physical top border in a single declaration.
It is documented as part of the CSS Backgrounds and Borders specification.
Syntax
/* Usage Example */
header {
/* physical shorthand: width | style | color */
border-top: 1px solid #e5e7eb;
margin-top: 2rem;
}
/* Global values */
border-top: inherit;
border-top: initial;
border-top: revert;
border-top: revert-layer;
border-top: unset;border-top 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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