margin-block-start

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句法
形式定义
形式句法
范例
规范
浏览器兼容性
另请参阅
相关话题

margin-block-start CSS property defines the logical block start margin of an element, which maps to a physical margin depending on the element's writing mode, directionality, and text orientation.

The source for this interactive example is stored in a GitHub repository. If you'd like to contribute to the interactive examples project, please clone https://github.com/mdn/interactive-examples and send us a pull request.

句法

/* <length> values */
margin-block-start: 10px;  /* An absolute length */
margin-block-start: 1em;   /* relative to the text size */
margin-block-start: 5%;    /* relative to the nearest block container's width */
/* Keyword values */
margin-block-start: auto;
/* Global values */
margin-block-start: inherit;
margin-block-start: initial;
margin-block-start: unset;

It corresponds to the margin-top , margin-right , margin-bottom ，或 margin-left property depending on the values defined for writing-mode , direction ，和 text-orientation .

It relates to margin-block-end , margin-inline-start ，和 margin-inline-end , which define the other margins of the element.

值

margin-block-start property takes the same values as the margin-left 特性。

形式定义

初始值	`0`
适用于	same as `margin`
继承	no
百分比	depends 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

形式句法

<'margin-left'>

范例

Setting block start margin

HTML

<div>
  <p class="exampleText">Example text</p>
</div>

CSS

div {
  background-color: yellow;
  width: 120px;
  height: 120px;
}
.exampleText {
  writing-mode: vertical-lr;
  margin-block-start: 20px;
  background-color: #c8c800;
}

结果

规范

规范	状态	注释
CSS Logical Properties and Values Level 1 The definition of 'margin-block-start' in that specification.	编者草案	初始定义

浏览器兼容性

The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request. 更新 GitHub 上的兼容性数据

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
`margin-block-start`	Chrome 完整支持 69	Edge 完整支持 79	Firefox 完整支持 41 完整支持 41 不支持 38 — 51 Disabled Disabled ). To change preferences in Firefox, visit	IE 不支持 No	Opera 完整支持 56	Safari 完整支持 12.1	WebView Android 完整支持 69	Chrome Android 完整支持 69	Firefox Android 完整支持 41 完整支持 41 不支持 38 — 51 Disabled Disabled ). To change preferences in Firefox, visit	Opera Android 完整支持 48	Safari iOS 完整支持 12.2	Samsung Internet Android 完整支持 10.0

图例

完整支持
不支持
用户必须明确启用此特征。

另请参阅

The mapped physical properties: margin-top , margin-right , margin-bottom ，和 margin-left
writing-mode , direction , text-orientation

元数据

最后修改： 2020 年 7 月 17 日

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句法

值