block-size
Baseline Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since September 2021.
CSS 属性 block-size
根据元素的书写模式定义了元素块的横向或纵向尺寸。根据 writing-mode
的值,此属性对应于 width
或 height
属性。
若为纵向书写模式,则 block-size
的值对应于元素的宽度;否则对应于元素的高度。与此相关的属性为 inline-size
,此属性定义了元素另一方向的尺度。
尝试一下
语法
css
/* <length> 值 */
block-size: 300px;
block-size: 25em;
/* <percentage> 值 */
block-size: 75%;
/* 关键词值 */
block-size: max-content;
block-size: min-content;
block-size: fit-content(20em);
block-size: auto;
/* 全局值 */
block-size: inherit;
block-size: initial;
block-size: revert;
block-size: revert-layer;
block-size: unset;
取值
形式定义
形式语法
block-size =
<'width'>
<width> =
auto |
<length-percentage [0,∞]> |
min-content |
max-content |
fit-content( <length-percentage [0,∞]> ) |
<calc-size()> |
<anchor-size()>
<length-percentage> =
<length> |
<percentage>
<calc-size()> =
calc-size( <calc-size-basis> , <calc-sum> )
<anchor-size()> =
anchor-size( [ <anchor-element> || <anchor-size> ]? , <length-percentage>? )
<calc-size-basis> =
<intrinsic-size-keyword> |
<calc-size()> |
any |
<calc-sum>
<calc-sum> =
<calc-product> [ [ '+' | '-' ] <calc-product> ]*
<anchor-element> =
<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
示例
竖排文本的块向尺寸
HTML
html
<p class="exampleText">示例文本</p>
CSS
css
.exampleText {
writing-mode: vertical-rl;
background-color: yellow;
block-size: 200px;
}
结果
规范
Specification |
---|
CSS Logical Properties and Values Level 1 # dimension-properties |
CSS Box Sizing Module Level 4 # sizing-values |
浏览器兼容性
BCD tables only load in the browser
参见
- 对应的实体属性:
width
和height
writing-mode