inset-inline-start
Baseline Widely available *
This feature is well established and works across many devices and browser versions. It’s been available across browsers since April 2021.
* Some parts of this feature may have varying levels of support.
Theinset-inline-startCSS 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 thetop,right,bottom, orleft property depending on the values defined forwriting-mode,direction, andtext-orientation.
Thisinset property has no effect on non-positioned elements.
Try it
writing-mode: horizontal-tb;writing-mode: vertical-rl;writing-mode: horizontal-tb;direction: rtl;writing-mode: vertical-lr;<section> <div> <div> I am absolutely positioned with inset-inline-start: 50px </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-element { border: 0.75em solid; padding: 0.75em; position: relative; width: 100%; min-height: 200px; unicode-bidi: bidi-override;}#abspos { background-color: yellow; color: black; border: 3px solid red; position: absolute; inset-inline-start: 50px; inline-size: 140px; min-block-size: 80px;}Syntax
/* <length> values */inset-inline-start: 3px;inset-inline-start: 2.4em;inset-inline-start: calc(anchor(--my-anchor 50%) + 10px);inset-inline-start: anchor-size(width);/* <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: revert;inset-inline-start: revert-layer;inset-inline-start: unset;The shorthand forinset-inline-start andinset-inline-end isinset-inline.
Values
Theinset-inline-start property takes the same values as theleft 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 | alength,percentage or calc(); |
Formal syntax
inset-inline-start =
auto|
<length-percentage>
<length-percentage> =
<length>|
<percentage>
Examples
Setting inline start offset
HTML
<div> <p>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 |
|---|
| CSS Logical Properties and Values Level 1 # propdef-inset-inline-start |
| CSS Positioned Layout Module Level 3 # propdef-inset-inline-start |
Browser compatibility
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See also
- The properties which defines other insets:
inset-block-start,inset-block-end, andinset-inline-end - The mapped physical properties:
top,right,bottom, andleft writing-mode,direction,text-orientation