• 日期: 2026-11-06
  • 标签: 常规

The '' element is used to group columns in an HTML table and apply styles to them collectively. It is typically used in conjunction with the '' element to define the properties of multiple columns at once.

Here is an example of how '' can be used:

<table>
  <colgroup>
    <col style='background-color: lightblue;'>
    <col style='background-color: lightgreen;'>
    <col style='background-color: lightyellow;'>
  </colgroup>
  <tr>
    <th>Column 1</th>
    <th>Column 2</th>
    <th>Column 3</th>
  </tr>
  <tr>
    <td>Data 1</td>
    <td>Data 2</td>
    <td>Data 3</td>
  </tr>
</table>

In this example, the '' element is used to group three '' elements, each with a different background color. These styles will be applied to the respective columns in the table.

Note that the '' element must be placed immediately after the opening '

' tag, and it should contain one or more '' elements. The '' elements can have various attributes and styles to define the properties of the columns.

HTML <colgroup> Element: Group Columns and Apply Styles

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