Web/CSS/inset-inline-start

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

/* <length> values */
inset-inline-start: 3px;
inset-inline-start: 2.4em;

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

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

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

The shorthand for inset-inline-start and inset-inline-end is inset-inline.

Syntax

Values

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

Formal definition

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

Formal syntax

<'top'>

Examples

Setting inline start offset

HTML

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

CSS

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

.exampleText {
  writing-mode: vertical-lr;
  position: relative;
  inset-inline-start: 20px;
  background-color: #c8c800;
}

Result

Specifications

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

Browser compatibility

Update compatibility data on GitHub

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
`inset-inline-start`	Chrome Full support 69 Disabled' Full support 69 Disabled' Disabled' From version 69: this feature is behind the `enable-experimental-web-platform-features` preference (needs to be set to `enabled`). To change preferences in Chrome, visit chrome://flags.	Edge Full support 79 Disabled' Full support 79 Disabled' Disabled' From version 79: this feature is behind the `enable-experimental-web-platform-features` preference (needs to be set to `enabled`).	Firefox Full support 63 Full support 63 No support 41 — 63 Alternate Name' Alternate Name' Uses the non-standard name: `offset-inline-start` No support 38 — 51 Disabled' Disabled' From version 38 until version 51 (exclusive): 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.	IE No support No	Opera Full support 56 Disabled' Full support 56 Disabled' Disabled' From version 56: this feature is behind the `enable-experimental-web-platform-features` preference (needs to be set to `enabled`).	Safari No support No	WebView Android No support No	Chrome Android Full support 69 Disabled' Full support 69 Disabled' Disabled' From version 69: this feature is behind the `enable-experimental-web-platform-features` preference (needs to be set to `enabled`). To change preferences in Chrome, visit chrome://flags.	Firefox Android Full support 63 Full support 63 No support 41 — 63 Alternate Name' Alternate Name' Uses the non-standard name: `offset-inline-start` No support 38 — 51 Disabled' Disabled' From version 38 until version 51 (exclusive): 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.	Opera Android Full support 48 Disabled' Full support 48 Disabled' Disabled' From version 48: this feature is behind the `enable-experimental-web-platform-features` preference (needs to be set to `enabled`).	Safari iOS No support No	Samsung Internet Android No support No

Legend

Full support: Full support
No support: No support
User must explicitly enable this feature.': User must explicitly enable this feature.
Uses a non-standard name.': Uses a non-standard name.