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.

/* <'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: unset; 

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.

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: 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-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

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

See also

This property maps to one of the physical border properties: border-top-style, border-right-style, border-bottom-style, or border-left-style. writing-mode, direction, text-orientation Select your preferred language English (US)EspañolFrançais日本語 Change language