<colgroup>: The Table Column Group element
The <colgroup>
HTML element defines a group of columns within a table.
Try it
Attributes
This element's attributes include the global attributes.
span
-
This attribute contains a positive integer indicating the number of consecutive columns the
<colgroup>
element spans. If not present, its default value is1
.The
span
attribute is not permitted if there are one or more<col>
elements within the<colgroup>
.
Deprecated attributes
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
Deprecated-
This enumerated attribute specifies how horizontal alignment of each column cell content will be handled. Possible values are:
left
, aligning the content to the left of the cellcenter
, centering the content in the cellright
, aligning the content to the right of the celljustify
, inserting spaces into the textual content so that the content is justified in the cellchar
, aligning the textual content on a special character with a minimal offset, defined by thechar
andcharoff
attributes.
If this attribute is not set, the
left
value is assumed. The descendant<col>
elements may override this value using their ownalign
attribute.Note: Do not try to set the
text-align
property on a selector giving a<colgroup>
element. Because<td>
elements are not descendant of the<colgroup>
element, they won't inherit it.If the table doesn't use a
colspan
attribute, use onetd:nth-child(an+b)
CSS selector per column, where 'a' is the total number of the columns in the table and 'b' is the ordinal position of this column in the table. Only after this selector thetext-align
property can be used.If the table does use a
colspan
attribute, the effect can be achieved by combining adequate CSS attribute selectors like[colspan=n]
, though this is not trivial. bgcolor
Deprecated-
The background color of the table. It is a 6-digit hexadecimal RGB code, prefixed by a '
#
'. One of the predefined color keywords can also be used.To achieve a similar effect, use the CSS
background-color
property. char
Deprecated-
This attribute specifies the alignment of the content in a column group to a character. Typical values for this include a period (.) when attempting to align numbers or monetary values. If
align
is not set tochar
, this attribute is ignored, though it will still be used as the default value for thealign
of the<col>
which are members of this column group. charoff
Deprecated-
This attribute is used to indicate the number of characters to offset the column data from the alignment character specified by the
char
attribute. valign
Deprecated-
This attribute specifies the vertical alignment of the text within each cell of the column. Possible values for this attribute are:
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 asbottom
.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;- and
top
, which will put the text as close to the top of the cell as it is possible.
Note: Do not try to set the
vertical-align
property on a selector giving a<colgroup>
element. Because<td>
elements are not descendant of the<colgroup>
element, they won't inherit it.If the table doesn't use a
colspan
attribute, use thetd:nth-child(an+b)
CSS selector per column, 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 thevertical-align
property can be used.If the table does use a
colspan
attribute, the effect can be achieved by combining adequate CSS attribute selectors like[colspan=n]
, though this is not trivial.
Examples
Please see the <table>
page for examples on <colgroup>
.
Technical summary
Content categories | None. |
---|---|
Permitted content |
If the span attribute is
present: none.If the attribute is not present: zero or more <col>
element
|
Tag omission |
The start tag may be omitted, if it has a <col>
element as its first child and if it is not preceded by a
<colgroup> whose end tag has been omitted.The end tag may be omitted, if it is not followed by a space or a comment. |
Permitted parents |
A <table> element. The
<colgroup> must appear after any optional
<caption> element but before any
<thead> , <th> ,
<tbody> , <tfoot> and
<tr> element.
|
Implicit ARIA role | No corresponding role |
Permitted ARIA roles | No role permitted |
DOM interface | HTMLTableColElement |
Specifications
Specification |
---|
HTML Standard # the-colgroup-element |
Browser compatibility
BCD tables only load in the browser
See also
- CSS properties and pseudo-classes that may be specially useful to style the
<col>
element:- the
width
property to control the width of the column; - the
:nth-child
pseudo-class to set the alignment on the cells of the column; - the
text-align
property to align all cells content on the same character, like '.'.
- the