margin-block-end

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 margin-block-end 定义了元素的逻辑块末外边距，并根据元素的书写模式、行内方向和文本朝向对应至实体外边距。

尝试一下

语法

css
/* <length> 值 */
margin-block-end: 10px; /* 绝对长度 */
margin-block-end: 1em; /* 相对于文本尺寸 */
margin-block-end: 5%; /* 相对于最近区块容器的宽度 */

/* 关键词值 */
margin-block-end: auto;

/* 全局值 */
margin-block-end: inherit;
margin-block-end: initial;
margin-block-end: revert;
margin-block-end: revert-layer;
margin-block-end: unset;

根据 writing-mode、direction 和 text-orientation 所定义的值，此属性对应于 margin-top、margin-right、margin-bottom 或 margin-left 属性。

与此属性相关的有 margin-block-start、margin-inline-start 和 margin-inline-end 等定义元素的其他外边距的属性。

取值

margin-block-end 属性的取值与 margin-left 属性相同。

形式定义

初始值0
适用元素same as margin
是否是继承属性否
Percentagesdepends on layout model
计算值if specified as a length, the corresponding absolute length; if specified as a percentage, the specified value; otherwise, auto
动画类型a length

形式语法

margin-block-end = 
  <'margin-top'>  

<margin-top> = 
  <length-percentage>  |
  auto                 |
  <anchor-size()>      

<length-percentage> = 
  <length>      |
  <percentage>  

<anchor-size()> = 
  anchor-size( [ <anchor-name> || <anchor-size> ]? , <length-percentage>? )  

<anchor-name> = 
  <dashed-ident>  

<anchor-size> = 
  width        |
  height       |
  block        |
  inline       |
  self-block   |
  self-inline

示例

设置块末外边距

HTML

html
<div>
  <p class="exampleText">示例文本</p>
</div>

CSS

css
div {
  background-color: yellow;
  width: 120px;
  height: 120px;
}

.exampleText {
  writing-mode: vertical-rl;
  margin-block-end: 20px;
  background-color: #c8c800;
}

结果

规范

Specification
CSS Logical Properties and Values Level 1
# margin-properties

浏览器兼容性

BCD tables only load in the browser

参见