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inset

The inset CSS property is a shorthand that corresponds to the top, right, bottom, and/or left properties. It has the same multi-value syntax of the margin shorthand.

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While part of the CSS Logical Properties specification, it does not define logical offsets. It defines physical offsets, regardless of the element's writing mode, directionality, and text orientation.

Syntax

/* <length> values */
inset: 10px; /* value applied to all edges */
inset: 4px 8px; /* top/bottom left/right */
inset: 5px 15px 10px; /* top left/right bottom */
inset: 2.4em 3em 3em 3em; /* top right bottom left */

/* <percentage>s of the width (left/right) or height (top/bottom) of the containing block */
inset: 10% 5% 5% 5%;

/* Keyword value */
inset: auto;

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

Values

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

Formal definition

Initial value as each of the properties of the shorthand:
Applies to positioned elements
Inherited no
Percentages relative to the containing block’s size in the corresponding axis (e.g. width for left or right, height for top or bottom)
Computed value as each of the properties of the shorthand:
  • top: if specified as a length, the corresponding absolute length; if specified as a percentage, the specified value; otherwise, auto
  • bottom: if specified as a length, the corresponding absolute length; if specified as a percentage, the specified value; otherwise, auto
  • left: if specified as a length, the corresponding absolute length; if specified as a percentage, the specified value; otherwise, auto
  • right: if specified as a length, the corresponding absolute length; if specified as a percentage, the specified value; otherwise, auto
Animation type a length, percentage or calc();

Formal syntax

inset = 
<top>{1,4}

Examples

Setting offsets for an element

HTML

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

CSS

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;
}

Result

Specifications

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
inset 87 87 66 No 73 14.1 87 87 66 62 14.5 14.0

See also

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Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/CSS/inset