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

The offset-inline-start CSS property defines the logical inline start offset 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 */
offset-inline-start: 3px;
offset-inline-start: 2.4em;

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

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

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

It relates to offset-block-start, offset-block-end, and offset-inline-end, which define the other offsets of the element.

Initial value auto
Applies to positioned elements
Inherited no
Percentages logical-width of containing block
Media visual
Computed value same as box offsets: top, right, bottom, left properties except that directions are logical
Animation type discrete
Canonical order the unique non-ambiguous order defined by the formal grammar



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

Formal syntax



HTML Content

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

CSS Content

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

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


Browser compatibility

Feature Chrome Edge Firefox Internet Explorer Opera Safari
Basic support No ?


38 — 511

No No No
Feature Android webview Chrome for Android Edge mobile Firefox for Android Opera Android iOS Safari Samsung Internet
Basic support No ? ?


38 — 511

No No ?

1. 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.

See also

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