HTML
<col>
element
defines a column within a table and is used for defining common semantics on all common cells. It is generally found within a
<colgroup>
元素。
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.
<col>
allows styling columns using CSS, but only a few properties will have an effect on the column (
see the CSS 2.1 specification
for a list).
| 内容类别 | None. |
|---|---|
| 准许内容 | None, it is an empty element . |
| Tag omission | It must have start tag, but must not have an end tag. |
| Permitted parents |
<colgroup>
only, though it can be implicitly defined as its start tag is not mandatory. The
<colgroup>
must not have a
span
属性。
|
| Implicit ARIA role | 无对应角色 |
| Permitted ARIA roles |
No
role
permitted
|
| DOM 接口 |
HTMLTableColElement
|
此元素包括 全局属性 .
span
<col>
element spans. If not present, its default value is
1
.
The following attributes are deprecated and should not be used. They are documented below for reference when updating existing code and for historical interest only.
align
left
, aligning the content to the left of the cell
center
, centering the content in the cell
right
, aligning the content to the right of the cell
justify
, inserting spaces into the textual content so that the content is justified in the cell
If this attribute is not set, its value is inherited from the
align
的
<colgroup>
element this
<col>
element belongs too. If there are none, the
left
value is assumed.
left
,
center
,
right
or
justify
值：
text-align
property on a selector giving a
<col>
element. Because
<td>
elements are not descendant of the
<col>
element, they won't inherit it.
colspan
attribute, use the
td:nth-child(an+b)
CSS selector. Set
a
to zero and
b
to the position of the column in the table, e.g.
td:nth-child(2) { text-align: right; }
to right-align the second column.
colspan
attribute, the effect can be achieved by combining adequate CSS attribute selectors like
[colspan=n]
, though this is not trivial.
bgcolor
The background color of the table. It is a
6-digit hexadecimal RGB code
, prefixed by a '
#
'. One of the predefined
color kewords
can also be used.
To achieve a similar effect, use the CSS
background-color
特性。
char
align
is not set to
char
, this attribute is ignored.
charoff
char
属性。
valign
baseline
, which will put the text as close to the bottom of the cell as it is possible, but align it on the
baseline
of the characters instead of the bottom of them. If characters are all of the size, this has the same effect as
bottom
.
bottom
, which will put the text as close to the bottom of the cell as it is possible;
middle
, which will center the text in the cell;
top
, which will put the text as close to the top of the cell as it is possible.
vertical-align
property on a selector giving a
<col>
element. Because
<td>
elements are not descendant of the
<col>
element, they won't inherit it.
colspan
attribute, use the
td:nth-child(an+b)
CSS selector where a is the total number of the columns in the table and b is the ordinal position of the column in the table. Only after this selector the
vertical-align
property can be used.
colspan
attribute, the effect can be achieved by combining adequate CSS attribute selectors like
[colspan=n]
, though this is not trivial.
width
0*
, which means that the width of each column in the group should be the minimum width necessary to hold the column's contents. Relative widths such as
5*
also can be used.
请参阅
<table>
page for examples on
<col>
.
| 桌面 | 移动 | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
col
|
Chrome 完整支持 1 | Edge 完整支持 12 | Firefox 完整支持 1 | IE 完整支持 Yes | Opera 完整支持 Yes | Safari 完整支持 Yes | WebView Android 完整支持 Yes | Chrome Android 完整支持 Yes | Firefox Android 完整支持 4 | Opera Android 完整支持 Yes | Safari iOS 完整支持 Yes | Samsung Internet Android 完整支持 Yes |
align
弃用
|
Chrome ? | Edge 完整支持 12 |
Firefox
不支持
No
注意事项
|
IE 完整支持 Yes | Opera ? | Safari ? | WebView Android ? | Chrome Android ? |
Firefox Android
不支持
No
注意事项
|
Opera Android ? | Safari iOS ? | Samsung Internet Android ? |
bgcolor
弃用
|
Chrome ? | Edge ? | Firefox 不支持 No | IE 完整支持 Yes | Opera ? | Safari ? | WebView Android ? | Chrome Android ? | Firefox Android 不支持 No | Opera Android ? | Safari iOS ? | Samsung Internet Android ? |
char
弃用
|
Chrome ? | Edge 完整支持 12 |
Firefox
不支持
No
注意事项
|
IE 完整支持 Yes | Opera ? | Safari ? | WebView Android ? | Chrome Android ? |
Firefox Android
不支持
No
注意事项
|
Opera Android ? | Safari iOS ? | Samsung Internet Android ? |
charoff
弃用
|
Chrome ? | Edge 完整支持 12 |
Firefox
不支持
No
注意事项
|
IE 完整支持 Yes | Opera ? | Safari ? | WebView Android ? | Chrome Android ? |
Firefox Android
不支持
No
注意事项
|
Opera Android ? | Safari iOS ? | Samsung Internet Android ? |
span
|
Chrome 完整支持 1 | Edge 完整支持 12 | Firefox 完整支持 1 | IE 完整支持 Yes | Opera 完整支持 Yes | Safari 完整支持 Yes | WebView Android 完整支持 Yes | Chrome Android 完整支持 Yes | Firefox Android 完整支持 4 | Opera Android 完整支持 Yes | Safari iOS 完整支持 Yes | Samsung Internet Android 完整支持 Yes |
valign
弃用
|
Chrome ? | Edge 完整支持 12 |
Firefox
不支持
No
注意事项
|
IE 完整支持 Yes | Opera ? | Safari ? | WebView Android ? | Chrome Android ? |
Firefox Android
不支持
No
注意事项
|
Opera Android ? | Safari iOS ? | Samsung Internet Android ? |
width
弃用
|
Chrome 完整支持 1 | Edge 完整支持 12 | Firefox 完整支持 1 | IE 完整支持 Yes | Opera 完整支持 Yes | Safari 完整支持 Yes | WebView Android 完整支持 Yes | Chrome Android 完整支持 Yes | Firefox Android 完整支持 4 | Opera Android 完整支持 Yes | Safari iOS 完整支持 Yes | Samsung Internet Android 完整支持 Yes |
完整支持
不支持
兼容性未知
弃用。不要用于新网站。
见实现注意事项。
<col>
元素：
width
property to control the width of the column;
:nth-child
pseudo-class to set the alignment on the cells of the column;
text-align
property to align all cells content on the same character, like '.'.