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 January 2020.

* Some parts of this feature may have varying levels of support.

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

margin-block-end: 20px;
writing-mode: horizontal-tb;

margin-block-end: 20px;
writing-mode: vertical-rl;

margin-block-end: 20%;
writing-mode: horizontal-tb;

margin-block-end: auto;
writing-mode: vertical-lr;


  

    
One

    
Two

    
Three

  




#container {
  width: 300px;
  height: 200px;
  display: flex;
  align-content: flex-start;
  flex-direction: column;
  justify-content: flex-start;
}

.row {
  height: 33.33%;
  display: inline-block;
  border: solid #ce7777 10px;
  background-color: #2b3a55;
  color: #ffffff;
  flex-shrink: 0;
}

#example-element {
  border: solid 10px #ffbf00;
  background-color: #2b3a55;
}

语法

css
/*  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'>  

 = 
    |
  auto                 |
        

 = 
        |
    

 = 
  anchor-size( [  ||  ]? , ? )  

 = 
    

 = 
  width        |
  height       |
  block        |
  inline       |
  self-block   |
  self-inline

示例

设置块末外边距

HTML

html

  
示例文本

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

参见