CSS margin-block-start property

Description

It is a logical property that defines space at the start side of a block. The selection of start side depends on the writing-mode.

It behaves like margin-top for the horizontal-tb writing mode.
It behaves like margin-right or margin-left for the vertical-rl and vertical-lr writing-mode respectively.

Change the direction of flow of text.

horizontal-tb vertical-lr vertical-rl

margin-block-start : length

0 lengthDefault 0: There is no thickness of the margin area at the start side of the border box.; margin-block-start: 0;
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+ve length 20: +ve value represents margin area at the start side of block.; margin-block-start: 20px;
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-ve length -20: The space decreases by 20px at the start of block i.e the the subsequent content may merge into the element.; margin-block-start: -20px;
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It applies to all elements

Code

CSS

.element{
width:120px;
height:120px;
background-color:rgba(220,220,220,0.5);
float:left;
}

HTML

<div class="element">
   Check the behavior of margin-block-start for different values of writing mode.
 </div>	
 content after the block