border-block
The most powerful logical shorthand for borders. It sets the width, style, and color of both the 'start' and 'end' borders in the block dimension with a single line of CSS.
Quick example
.panel {
/* Sets a 1px solid gray border on both top and bottom edges */
border-block: 1px solid #ccc;
}Quick facts
Initial value
See individual propertiesInherited
No
Applies to
all elements
Values
border-block-start border-block 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.
87+
66+
14.1+
87+