inset-inline

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.

* Some parts of this feature may have varying levels of support.

The inset-inline CSS property defines the logical start and end offsets of an element in the inline direction, which maps to physical offsets depending on the element's writing mode, directionality, and text orientation. It corresponds to the top and bottom, or right and left properties depending on the values defined for writing-mode, direction, and text-orientation.

This inset property has no effect on non-positioned elements.

Try it

inset-inline: 5% 10%;
writing-mode: horizontal-tb;

inset-inline: 10px 40px;
writing-mode: vertical-rl;

inset-inline: 5% 10%;
writing-mode: horizontal-tb;
direction: rtl;

<section id="default-example">
  <div class="example-container">
    <div id="example-element">I am absolutely positioned.</div>
    <p>
      As much mud in the streets as if the waters had but newly retired from the
      face of the earth, and it would not be wonderful to meet a Megalosaurus,
      forty feet long or so, waddling like an elephantine lizard up Holborn
      Hill.
    </p>
  </div>
</section>

.example-container {
  border: 0.75em solid #ad1457;
  padding: 0.75em;
  text-align: left;
  position: relative;
  width: 100%;
  min-height: 200px;
}

#example-element {
  background-color: #07136c;
  border: 6px solid #ffa000;
  color: white;
  position: absolute;
  inset: 0;
}

Constituent properties

This property is a shorthand for the following CSS properties:

Syntax

css

/* <length> values */
inset-inline: 3px 10px;
inset-inline: 2.4em 3em;
inset-inline: 10px; /* value applied to start and end */
inset-inline: auto calc(anchor(self-start) + 20px);
inset-inline: 400px anchor-size(--myAnchor height, 100px);

/* <percentage>s of the width or height of the containing block */
inset-inline: 10% 5%;

/* Keyword value */
inset-inline: auto;

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

Values

The inset-inline property takes the same values as the left property.

Formal definition

Initial value	as each of the properties of the shorthand: `inset-inline-start`: `auto` `inset-inline-end`: `auto`
Applies to	positioned elements
Inherited	no
Percentages	logical-width of containing block
Computed value	as each of the properties of the shorthand: `inset-inline-start`: same as box offsets: `top`, `right`, `bottom`, `left` properties except that directions are logical `inset-inline-end`: same as box offsets: `top`, `right`, `bottom`, `left` properties except that directions are logical
Animation type	a length, percentage or calc();

Formal syntax

inset-inline = 
  <'top'>{1,2}  

<top> = 
  auto                 |
  <length-percentage>  |
  <anchor()>           |
  <anchor-size()>      

<length-percentage> = 
  <length>      |
  <percentage>  

<anchor()> = 
  anchor( <anchor-name>?                  &&
  <anchor-side> , <length-percentage>? )  

<anchor-size()> = 
  anchor-size( [ <anchor-name> || <anchor-size> ]? , <length-percentage>? )  

<anchor-name> = 
  <dashed-ident>  

<anchor-side> = 
  inside        |
  outside       |
  top           |
  left          |
  right         |
  bottom        |
  start         |
  end           |
  self-start    |
  self-end      |
  <percentage>  |
  center        

<anchor-size> = 
  width        |
  height       |
  block        |
  inline       |
  self-block   |
  self-inline

Examples

Setting inline start and end offsets

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;
  position: relative;
  inset-inline: 20px 50px;
  background-color: #c8c800;
}

Result

Specifications

Specification
CSS Logical Properties and Values Level 1 # propdef-inset-inline
CSS Positioned Layout Module Level 3 # propdef-inset-inline

Browser compatibility

Report problems with this compatibility data on GitHub

	desktop					mobile
	Chrome	Edge	Firefox	Opera	Safari	Chrome Android	Firefox for Android	Opera Android	Safari on iOS	Samsung Internet	WebView Android	WebView on iOS
`inset-inline`
`anchor()` Experimental
`anchor-size()` Experimental
`auto`

Tip: you can click/tap on a cell for more information.

Full support: Full support
In development. Supported in a pre-release version.: In development. Supported in a pre-release version.
No support: No support
: Experimental. Expect behavior to change in the future.
: See implementation notes.
: Uses a non-standard name.
: Has more compatibility info.

HTML

CSS

Result

Legend