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HTML <colgroup> width Attribute

HTML colgroup Tag Reference HTML <colgroup> tag

Example

A <colgroup> element that specifies that the first column should have a predefined width of 200 pixels:

<table border="1">
<colgroup width="200">
<tr>
    <th>Month</th>
    <th>Savings</th>
</tr>
<tr>
    <td>January</td>
    <td>$100</td>
</tr>
<tr>
    <td>February</td>
    <td>$80</td>
</tr>
</table>

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Browser Support

The width attribute is supported in all major browsers. However, none of the browsers support the relative_length value.

Definition and Usage

The <colgroup> width attribute is not supported in HTML5.

The width attribute specifies the width of a column group.

Normally, a column group takes up the space it needs to display the content. The width attribute is used to set a predefined width of a column group.

Note: This attribute will be overwritten by any width set by <col> elements.

Syntax

Attribute Values

Value	Description
pixels	Sets the width in pixels (example: width="50")
%	Sets the width in percent of the surrounding element (example: width="50%")
relative_length	Shares the available pixels into parts. (e.g. A table is 100 px, the first column group is 20 px, the second is 50%, the available pixels will then be 30px). One part is set like this: "1". Example: If 30 px of space are available, you can have one "1" and one "2", which will be interpreted as 10 and 20 px (think of 1 as one part, and 2* as two parts).