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

/* <length> values */ inset-block: 3px 10px; inset-block: 2.4em 3em; inset-block: 10px; /* value applied to start and end */  /* <percentage>s of the width or height of the containing block */ inset-block: 10% 5%;  /* Keyword value */ inset-block: auto;  /* Global values */ inset-block: inherit; inset-block: initial; inset-block: revert; inset-block: unset; 

inset-block

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

/* <length> values */ inset-block: 3px 10px; inset-block: 2.4em 3em; inset-block: 10px; /* value applied to start and end */  /* <percentage>s of the width or height of the containing block */ inset-block: 10% 5%;  /* Keyword value */ inset-block: auto;  /* Global values */ inset-block: inherit; inset-block: initial; inset-block: revert; inset-block: unset; 

Constituent properties

This property is a shorthand for the following CSS properties:

inset-block-end inset-block-start

Syntax

Values

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

Formal definition

Initial value	auto
Applies to	positioned elements
Inherited	no
Percentages	logical-height 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'>{1,2}

Examples

Setting block start and end offsets

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-block: 20px 50px;   background-color: #c8c800; } 

Result

Specifications

Specification
CSS Logical Properties and Values Level 1 # propdef-inset-block

See also

The mapped physical properties: top, right, bottom, and left The mapped physical shortcut: inset The mapped inline shortcut: inset-inline writing-mode, direction, text-orientation

Last modified: Jan 20, 2022, by MDN contributors

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