block-size
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
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: #ffffff;
}
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 =
auto |
<box-size>
<box-size> =
<length-percentage> |
stretch |
contain |
min-content |
max-content |
fit-content |
fit-content( ) |
calc-size( )
<length-percentage> =
<length> |
<percentage>
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
| 规范 |
|---|
| CSS Logical Properties and Values Module Level 1 # propdef-block-size |
浏览器兼容性
参见
- 对应的实体属性：
width和height writing-mode