margin-block-start
The margin-block-start
CSS property defines the logical block start margin of an element, which maps to a physical margin depending on the element's writing mode, directionality, and text orientation.
Syntax
/* <length> values */ margin-block-start: 10px; /* An absolute length */ margin-block-start: 1em; /* relative to the text size */ margin-block-start: 5%; /* relative to the nearest block container's width */ /* Keyword values */ margin-block-start: auto; /* Global values */ margin-block-start: inherit; margin-block-start: initial; margin-block-start: revert; margin-block-start: unset;
It corresponds to the margin-top
, margin-right
, margin-bottom
, or margin-left
property depending on the values defined for writing-mode
, direction
, and text-orientation
.
It relates to margin-block-end
, margin-inline-start
, and margin-inline-end
, which define the other margins of the element.
Values
The margin-block-start
property takes the same values as the margin-left
property.
Formal definition
Initial value | 0 |
---|---|
Applies to | same as margin
|
Inherited | no |
Percentages | depends on layout model |
Computed value | if specified as a length, the corresponding absolute length; if specified as a percentage, the specified value; otherwise, auto
|
Animation type | a length |
Formal syntax
<'margin-left'>
Examples
Setting block start margin
HTML
<div> <p class="exampleText">Example text</p> </div>
CSS
div { background-color: yellow; width: 120px; height: 120px; } .exampleText { writing-mode: vertical-lr; margin-block-start: 20px; background-color: #c8c800; }
Result
Specifications
Specification |
---|
CSS Logical Properties and Values Level 1 (CSS Logical Properties 1) # margin-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 | |
margin-block-start |
69 |
79 |
41 |
No |
56 |
12.1 |
69 |
69 |
41 |
48 |
12.2 |
10.0 |
See also
- The mapped physical properties:
margin-top
,margin-right
,margin-bottom
, andmargin-left
-
writing-mode
,direction
,text-orientation
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https://developer.mozilla.org/en-US/docs/Web/CSS/margin-block-start