Baseline Widely available *
The block-size
CSS property defines the size of an element's block along the block axis. If the writing-mode
is horizontal, it corresponds to the height
; if the writing mode is vertical, it corresponds to the width
. A related property is inline-size
, which defines the other dimension of the element.
block-size: 150px;
writing-mode: horizontal-tb;
block-size: 150px;
writing-mode: vertical-rl;
block-size: auto;
writing-mode: horizontal-tb;
block-size: auto;
writing-mode: vertical-lr;
<section class="default-example" id="default-example">
<div class="transition-all" id="example-element">
This is a box where you can change the block-size.
</div>
</section>
#example-element {
display: flex;
flex-direction: column;
background-color: #5b6dcd;
justify-content: center;
color: white;
}
Syntax
/* <length> values */
block-size: 300px;
block-size: 25em;
block-size: anchor-size(height);
block-size: calc(anchor-size(--my-anchor block) * 0.75);
/* <percentage> values */
block-size: 75%;
/* Keyword values */
block-size: max-content;
block-size: min-content;
block-size: fit-content;
block-size: fit-content(20em);
block-size: auto;
/* Global values */
block-size: inherit;
block-size: initial;
block-size: revert;
block-size: revert-layer;
block-size: unset;
Values
The block-size
property takes the same values as the width
and height
properties.
block-size =Examples Block size with vertical text HTML
<'width'><width> =
auto |
<length-percentage [0,â]> |
min-content |
max-content |
fit-content( <length-percentage [0,â]> ) |
<calc-size()> |
<anchor-size()><length-percentage> =
<length> |
<percentage><calc-size()> =
calc-size( <calc-size-basis> , <calc-sum> )<anchor-size()> =
anchor-size( [ <anchor-name> || <anchor-size> ]? , <length-percentage>? )<calc-size-basis> =
<size-keyword> |
<calc-size()> |
any |
<calc-sum><calc-sum> =
<calc-product> [ [ '+' | '-' ] <calc-product> ]*<anchor-name> =
<dashed-ident><anchor-size> =
width |
height |
block |
inline |
self-block |
self-inline<calc-product> =
<calc-value> [ [ '*' | / ] <calc-value> ]*<calc-value> =
<number> |
<dimension> |
<percentage> |
<calc-keyword> |
( <calc-sum> )<calc-keyword> =
e |
pi |
infinity |
-infinity |
NaN
<p class="exampleText">Example text</p>
CSS
.exampleText {
writing-mode: vertical-rl;
background-color: yellow;
block-size: 200px;
}
Result Specifications Browser compatibility See also
width
and height
writing-mode
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