标题端 | caption-side (Miscellaneous Level 2)

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标题端 | caption-side (Miscellaneous Level 2) - CSS 中文开发手册

caption-side

该caption-side CSS属性，将一个表的内容<caption>在指定的一面。这些值是相对于writing-mode表的。

/* Directional values */ 
caption-side: top; 
caption-side: bottom; 

/* Warning: non-standard values */ 
caption-side: left; 
caption-side: right; 
caption-side: top-outside; 
caption-side: bottom-outside; 

/* Global values */ 
caption-side: inherit; 
caption-side: initial; 
caption-side: unset;

Initial value	top
应用对象	table-caption elements
是否可继承	yes
媒体	visual
计算值	as specified
动画类型	discrete
规范顺序	the unique non-ambiguous order defined by the formal grammar

语法

值

top标题框应放置在表的上方。bottom标题框应放置在表下面。left标题框应放置在表的左侧。

注：这个值是为CSS 2提出的，但从最终的CSS 2.1规范中删除。这是不标准的。

right标题框应放置在表的右侧。

注：这个值是为CSS 2提出的，但从最终的CSS 2.1规范中删除。这是不标准的。

top-outside标题框应位于表格上方，而宽度和水平对齐行为不会绑定到表格的水平布局。

注：css 2.1规范注意到css 2规范描述了top值，该值将由该值在未来的规范中重新引入。

bottom-outside标题框应位于表格下方，而宽度和水平对齐行为不会绑定到表格的水平布局。

注：css 2.1规范注意到css 2规范描述了bottom值，该值将由该值在未来的规范中重新引入。

inherit

caption-side必须使用在父元素上定义的值。

形式语法

top | bottom | block-start | block-end | inline-start | inline-end

例

HTML

<table class="top">
  <caption>Caption ABOVE the table</caption>
  <tr>
    <td>Some data</td>
    <td>Some more data</td>
  </tr>
</table>

<br>

<table class="bottom">
  <caption>Caption BELOW the table</caption>
  <tr>
    <td>Some data</td>
    <td>Some more data</td>
  </tr>
</table>

CSS

.top caption {
  caption-side: top;
}

.bottom caption {
  caption-side: bottom;
}

table {
  border: 1px solid red;
}

td {
  border: 1px solid blue;
}

结果

规范

Specification	Status	Comment
CSS Logical Properties Level 1The definition of 'caption-side' in that specification.	Editor's Draft	Defines the top and bottom values as relative to the writing-mode value.
CSS Level 2 (Revision 1)The definition of 'caption-side' in that specification.	Recommendation	Initial definition.

浏览器兼容性

Feature	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari
Basic support	1.0	(Yes)	1.0	8.0	4.0	1.0
left, right, top-outside and bottom-outside	No support	No support	(Yes)	No support	No support	No support
top and bottom are relative to the writing-mode value	No support	No support	42 (42)	No support	No support	No support

Feature	Android	Edge	Firefox Mobile (Gecko)	IE Phone	Opera Mobile	Safari Mobile
Basic support	(Yes)	(Yes)	?	?	?	(Yes)
left, right, top-outside and bottom-outside	No support	No support	?	No support	No support	No support
top and bottom are relative to the writing-mode value	No support	No support	42.0 (42)	No support	No support	No support

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