border-block-start-style CSS property
Baseline
Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since January 2020.
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
border-block-start-style: dotted;
writing-mode: horizontal-tb;
border-block-start-style: dotted;
writing-mode: vertical-rl;
border-block-start-style: groove;
writing-mode: horizontal-tb;
border-block-start-style: dashed;
writing-mode: vertical-lr;
<section class="default-example" id="default-example">
<div class="transition-all" id="example-element">
This is a box with a border around it.
</div>
</section>
#example-element {
background-color: #eeeeee;
color: black;
border: 0.75em solid;
padding: 0.75em;
width: 80%;
height: 100px;
unicode-bidi: bidi-override;
}
Syntax
css
/* <'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 =
<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-start-style: dashed;
}
Results
Specifications
| Specification |
|---|
| CSS Logical Properties and Values Module Level 1 # border-style |
Browser compatibility
| desktop | mobile | |||||||||||
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border-block-start-style
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dashed
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dotted
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double
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groove
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hidden
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inset
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none
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outset
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ridge
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solid
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Legend
Tip: you can click/tap on a cell for more information.
- Full support
- Full support
See also
- CSS Logical Properties and Values
- This property maps to one of the physical border properties:
border-top-style,border-right-style,border-bottom-style, orborder-left-style. writing-mode,direction,text-orientation