border-inline-start

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-inline-start CSS property is a shorthand property for setting the individual logical inline-start border property values in a single place in the style sheet.

Constituent properties

This property is a shorthand for the following CSS properties:

Syntax

css

border-inline-start: 1px;
border-inline-start: 2px dotted;
border-inline-start: medium dashed green;

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

The physical border to which border-inline-start maps depends on the element's writing mode, directionality, and text orientation. It corresponds to the border-top, border-right, border-bottom, or border-left property depending on the values defined for writing-mode, direction, and text-orientation.

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

Values

The border-inline-start is specified with one or more of the following, in any order:

<'border-width'>: The width of the border. See border-width.
<'border-style'>: The line style of the border. See border-style.
<color>: The color of the border.

Formal definition

Initial value	as each of the properties of the shorthand: `border-width`: as each of the properties of the shorthand: `border-top-width`: `medium` `border-right-width`: `medium` `border-bottom-width`: `medium` `border-left-width`: `medium` `border-style`: as each of the properties of the shorthand: `border-top-style`: `none` `border-right-style`: `none` `border-bottom-style`: `none` `border-left-style`: `none` `color`: `canvastext`
Applies to	all elements
Inherited	no
Computed value	as each of the properties of the shorthand: `border-width`: as each of the properties of the shorthand: `border-bottom-width`: the absolute length or `0` if `border-bottom-style` is `none` or `hidden` `border-left-width`: the absolute length or `0` if `border-left-style` is `none` or `hidden` `border-right-width`: the absolute length or `0` if `border-right-style` is `none` or `hidden` `border-top-width`: the absolute length or `0` if `border-top-style` is `none` or `hidden` `border-style`: as each of the properties of the shorthand: `border-bottom-style`: as specified `border-left-style`: as specified `border-right-style`: as specified `border-top-style`: as specified `border-inline-start-color`: computed color
Animation type	as each of the properties of the shorthand: `border-inline-start-color`: by computed value type `border-inline-start-style`: discrete `border-inline-start-width`: by computed value type

Formal syntax

border-inline-start = 
  <line-width>  ||
  <line-style>  ||
  <color>       

<line-width> = 
  <length [0,∞]>  |
  thin            |
  medium          |
  thick           

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

Examples

HTML

html

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

CSS

css

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

.exampleText {
  writing-mode: vertical-rl;
  border-inline-start: 5px dashed blue;
}

Specifications

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

Browser compatibility

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