This is an experimental technology
Check the Browser compatibility table carefully before using this in production.

Theborder-inline-end-width CSS property defines the width of the logical inline-end border 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, border-right-width, border-bottom-width, or border-left-width property depending on the values defined for writing-mode, direction, and text-orientation.

/* <'border-width'> values */
border-inline-end-width: 2px;
border-inline-end-width: thick;

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

Initial value medium
Applies to all elements
Inherited no
Percentages logical-width of containing block
Media visual
Computed value absolute length; 0 if the border style is none or hidden
Animation type discrete
Canonical order the unique non-ambiguous order defined by the formal grammar



The width of the border. See border-width.

Formal syntax



HTML Content

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

CSS Content

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

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


Browser compatibility

Feature Chrome Edge Firefox Internet Explorer Opera Safari
Basic support No ?


381 2


No No No
Feature Android webview Chrome for Android Edge mobile Firefox for Android IE mobile Opera Android iOS Safari
Basic support No ? ?


381 2


No No No

1. Enabled by default since Firefox 41.

2. From version 38: this feature is behind the layout.css.vertical-text.enabled preference (needs to be set to true). To change preferences in Firefox, visit about:config.

3. Supported as -moz-border-end-width.

See also

© 2005–2018 Mozilla Developer Network and individual contributors.
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.