colgroup — A group of columns in an HTML table
colgroup ::=
col
*
Identifies a column group in an HTML table.
Specifies the alignment of data and the justification of text in a cell.
Enumerated values: | |
---|---|
“left” | Left-flush data/Left-justify text. This is the default value for table data. |
“center” | Center data/Center-justify text. This is the default value for table headers. |
“right” | Right-flush data/Right-justify text. |
“justify” | Double-justify text. |
“char” | Align text around a specific character. If a user agent doesn’t support character alignment, behavior in the presence of this value is unspecified. |
Specifies a single character within a text fragment to act
as an axis for alignment. The default value for this attribute
is the decimal point character for the current language as set
by the lang
attribute (e.g., the period in
English and the comma in French). User agents are not required
to support this attribute.
When present, specifies the offset to the first occurrence
of the alignment character on each line. If a line doesn’t
include the alignment character, it should be horizontally
shifted to end at the alignment position. When
charoff
is used to set the offset of an
alignment character, the direction of offset is determined by
the current text direction (set by the dir
attribute). In left-to-right texts (the default), offset is from
the left margin. In right-to-left texts, offset is from the
right margin. User agents are not required to support this
attribute.
Enumerated values: | |
---|---|
xsd:integer | An explicit offset |
xsd:string (Pattern:
“[0–9]+%”) | A percentage offset |
Assigns a class name or set of class names to an element. Any number of elements may be assigned the same class name or names. Multiple class names must be separated by whitespace characters.
Specifies the base language of an element’s attribute values and text content. The default value of this attribute is unknown.
Occurs when the pointing device button is clicked over an element.
Occurs when the pointing device button is double-clicked over an element.
Occurs when a key is pressed down over an element.
Occurs when a key is pressed and released over an element.
Occurs when a key is released over an element.
Occurs when the pointing device button is pressed over an element.
Occurs when the pointing device is moved while it is over an element.
Occurs when the pointing device is moved away from an element.
Occurs when the pointing device is moved onto an element.
Occurs when the pointing device button is released over an element.
An attribute that must be an integer > 0, and that
specifies the number of columns in a column group. In the
absence of a span
attribute, each
colgroup
defines a column group containing
one column. If the span
attribute is set to N
> 0, the current colgroup
element defines
a column group containing N columns. User agents must ignore
this attribute if the colgroup
element
contains one or more col
elements.
Specifies style information for the current element.
Offers advisory information about the element for which it is set.
Specifies the vertical position of data within a cell.
Enumerated values: | |
---|---|
“top” | Cell data is flush with the top of the cell. |
“middle” | Cell data is centered vertically within the cell. This is the default value. |
“bottom” | Cell data is flush with the bottom of the cell. |
“baseline” | All cells in the same row as a cell whose
|
Specifies a default width for each column in the current
column group. In addition to the standard pixel, percentage, and
relative values, this attribute allows the special form
“0*” (zero asterisk), which means that the width of
each column in the group should be the minimum width necessary
to hold the column’s contents. This implies that a column’s
entire contents must be known before its width may be correctly
computed. Authors should be aware that specifying
“0*” will prevent visual user agents from rendering
a table incrementally. This attribute is overridden for any
column in the column group whose width is specified via a
col
element.