inset-block-start
The inset-block-start
CSS property defines the logical block start offset of an element, which maps to a physical inset 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-block-start: 3px; inset-block-start: 2.4em; /* <percentage>s of the width or height of the containing block */ inset-block-start: 10%; /* Keyword value */ inset-block-start: auto; /* Global values */ inset-block-start: inherit; inset-block-start: initial; inset-block-start: revert; inset-block-start: unset;
Syntax
Values
The inset-block-start
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'>
Examples
Setting block 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-block-start: 20px; background-color: #c8c800; }
Specifications
Specification |
---|
CSS Logical Properties and Values Level 1 (CSS Logical Properties 1) # position-properties |
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-block-start |
87
69
|
87
79
|
63
41-63
|
No |
73
56
|
14.1 |
87 |
87
69
|
63
41-63
|
62 |
14.5 |
14.0 |
See also
- The properties which defines other insets:
inset-block-end
,inset-inline-start
, andinset-inline-end
- The mapped physical properties:
top
,right
,bottom
, andleft
-
writing-mode
,direction
,text-orientation
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https://developer.mozilla.org/en-US/docs/Web/CSS/inset-block-start