border-block-start-style
Determines the line style (solid, dashed, etc.) for the 'start' side border. In standard western layouts, this is the top border.
Quick example
article {
border-block-start-style: dotted;
border-block-start-width: 2px;
border-block-start-color: #94a3b8;
}Quick facts
Initial value
noneInherited
No
Applies to
all elements
Animation type
discrete
Values
border-top-style border-block-start-style Browser Support
Widely available Since 2021 95% global usage
This feature is well established and works across many devices and browser versions. It has been available across browsers since 2021.
Safe to use without fallbacks.
69+
41+
12.1+
79+