border-block-style

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since September 2021.

The border-block-style CSS property defines the style of the logical block borders of an element, which maps to a physical border style depending on the element's writing mode, directionality, and text orientation. It corresponds to the border-top-style and border-bottom-style, or border-left-style and border-right-style properties depending on the values defined for writing-mode, direction, and text-orientation.

Try it

The border style in the other dimension can be set with border-inline-style, which sets border-inline-start-style, and border-inline-end-style.

Syntax

css
/* <'border-style'> values */
border-block-style: dashed;
border-block-style: dotted;
border-block-style: groove;

/* Global values */
border-block-style: inherit;
border-block-style: initial;
border-block-style: revert;
border-block-style: revert-layer;
border-block-style: unset;

Values

<'border-style'>

The line style of the border. See border-style.

Formal definition

Initial valuenone
Applies toall elements
Inheritedno
Computed valueas specified
Animation typediscrete

Formal syntax

border-block-style = 
  <'border-top-style'>{1,2}  

<border-top-style> = 
  <line-style>  

<line-style> = 
  none    |
  hidden  |
  dotted  |
  dashed  |
  solid   |
  double  |
  groove  |
  ridge   |
  inset   |
  outset

Examples

Dashed border with vertical text

HTML

html
<div>
  <p class="exampleText">Example text</p>
</div>

CSS

css
div {
  background-color: yellow;
  width: 120px;
  height: 120px;
}

.exampleText {
  writing-mode: vertical-lr;
  border: 5px solid blue;
  border-block-style: dashed;
}

Results

Specifications

Specification
CSS Logical Properties and Values Level 1
# propdef-border-block-style

Browser compatibility

BCD tables only load in the browser

See also