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border-block-start-style

The border-block-start-style CSS property defines the style of the logical block start border 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, border-right-style, border-bottom-style, or border-left-style property depending on the values defined for writing-mode, direction, and text-orientation.

Try it

Syntax

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

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

Related properties are border-block-end-style, border-inline-start-style, and border-inline-end-style, which define the other border styles of the element.

Values

<'border-style'>

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

Formal definition

Initial value none
Applies to all elements
Inherited no
Computed value as specified
Animation type discrete

Formal syntax

border-block-start-style = 
<'border-top-style'>

Examples

Dashed border with vertical text

HTML

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

CSS

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

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

Results

Specifications

Browser compatibility

Desktop Mobile
Chrome Edge Firefox Internet Explorer Opera Safari WebView Android Chrome Android Firefox for Android Opera Android Safari on IOS Samsung Internet
border-block-start-style 69 79 41 No 56 12.1 69 69 41 48 12.2 10.0

See also

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Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/CSS/border-block-start-style