margin-block-start

Baseline Widely available *

This feature is well established and works across many devices and browser versions. Itâs been available across browsers since 2020å¹´1æ.

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

è©¦ãã¦ã¿ã¾ããã

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

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

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

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

<section id="default-example">
  <div id="container">
    <div class="row">One</div>
    <div class="row transition-all" id="example-element">Two</div>
    <div class="row">Three</div>
  </div>
</section>

#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: white;
  flex-shrink: 0;
}

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

æ§æ

css

/* <length> å¤ */
margin-block-start: 10px; /* çµ¶å¯¾çãªé·ã */
margin-block-start: 1em; /* ããã¹ãã®å¤§ããã«å¯¾ããç¸å¯¾å¤ */
margin-block-start: 5%; /* ç´è¿ã®ãããã¯ã³ã³ããã¼ã®å¤§ããã«å¯¾ããç¸å¯¾å¤ */
margin-block-start: anchor-size(width);
margin-block-start: calc(anchor-size(--my-anchor block, 20px) / 3);

/* ãã¼ã¯ã¼ãå¤ */
margin-block-start: auto;

/* ã°ãã¼ãã«å¤ */
margin-block-start: inherit;
margin-block-start: initial;
margin-block-start: revert;
margin-block-start: revert-layer;
margin-block-start: unset;

ããã¯ margin-top, margin-right, margin-bottom, margin-left ã®ããããã®ããããã£ã«å¯¾å¿ããã©ãã«å¯¾å¿ãããã¯ writing-mode, direction, text-orientation ã§å®ç¾©ãããå¤ã«ãã£ã¦æ±ºã¾ãã¾ãã

é¢é£ããããã£ã¨ãã¦ãè¦ç´ ã®ä»ã®ãã¼ã¸ã³ãå®ç¾©ãã margin-block-end, margin-inline-start, margin-inline-end ãããã¾ãã

å¤

margin-block-start ããããã£ã¯ margin-top ããããã£ã¨åãå¤ãåãã¾ãã

å¬å¼å®ç¾©

åæå¤	`0`
é©ç¨å¯¾è±¡	`margin` ã¨åã
ç¶æ¿	ãªã
ãã¼ã»ã³ãå¤	ã¬ã¤ã¢ã¦ãã¢ãã«ã«ä¾å
è¨ç®å¤	é·ãã§æå®ãããã¨ç¸å½ããçµ¶å¯¾çãªé·ãããã¼ã»ã³ãå¤ã¨ãã¦æå®ãããã¨æå®å¤ãããä»¥å¤ã§ã¯ `auto`
ã¢ãã¡ã¼ã·ã§ã³ã®ç¨®é¡	length

å½¢å¼ææ³

margin-block-start = 
  <'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

ä¾

ãããã¯æ¹åã®åé ã®ãã¼ã¸ã³ã®è¨å®

HTML

html

<div>
  <p class="exampleText">ããã¹ãã®ä¾</p>
</div>

CSS

css

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

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