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

The inset CSS property, though part of the logical specification, doesn't define logical block or inline offsets, and instead defines physical offsets, regardless of the element's writing mode, directionality, and text orientation. It has the same multi-value syntax of the margin shorthand. It is a shorthand that corresponds to the top, right, bottom, and/or left properties.

/* <length> values */
inset: 5px 15px 10px; /* top left/right bottom */
inset: 2.4em 3em 3em 3em; /* top right bottom left */
inset: 10px; /* value applied to all edges */

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

/* Keyword value */
inset: auto;

/* Global values */
inset: inherit;
inset: initial;
inset: unset;

Initial valueauto
Applies topositioned elements
Percentageslogical-height of containing block
Computed valuesame as box offsets: top, right, bottom, left properties except that directions are logical
Animation typea length, percentage or calc();
Canonical orderthe unique non-ambiguous order defined by the formal grammar



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

Formal syntax



HTML Content

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

CSS Content

div {
  background-color: yellow;
  width: 150px;
  height: 120px;
  position: relative;

.exampleText {
  writing-mode: sideways-rl;
  position: absolute;
  inset: 20px 40px 30px 10px;
  background-color: #c8c800;


Specification Status Comment
CSS Logical Properties and Values Level 1
The definition of 'inset' in that specification.
Editor's Draft Initial definition

Browser compatibility

Update compatibility data on GitHub
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidFirefox for AndroidOpera for AndroidSafari on iOSSamsung Internet
Chrome No support NoEdge No support NoFirefox Full support 66IE No support NoOpera No support NoSafari No support NoWebView Android No support NoChrome Android No support NoFirefox Android Full support 66Opera Android No support NoSafari iOS No support NoSamsung Internet Android No support No


Full support  
Full support
No support  
No support
Experimental. Expect behavior to change in the future.
Experimental. Expect behavior to change in the future.

See also