border-inline-width

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

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

Syntax

/* <'border-width'> values */
border-inline-width: 5px 10px;
border-inline-width: 5px;
border-inline-width: thick;

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

Values

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

Formal definition

Initial value	`medium`
Applies to	all elements
Inherited	no
Percentages	logical-width of containing block
Computed value	absolute length; `0` if the border style is `none` or `hidden`
Animation type	discrete

Formal syntax

<'border-top-width'>

Examples

HTML

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

CSS

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

.exampleText {
  writing-mode: vertical-lr;
  border: 1px solid blue;
  border-inline-width: 5px 10px;
}

Specifications

Specification
CSS Logical Properties and Values Level 1 (CSS Logical Properties 1) # propdef-border-inline-width

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-inline-width`	87 69	87 79	66	No	73 56	14.1	87	87 69	66	48	14.5	14.0