colspan3

Colspan3 is not an HTML element or tag, but a reference to using the colspan attribute with the value 3 to make a table cell span across three columns. In standard HTML, this is written as colspan="3" on a td or th element.

Usage and syntax

A cell with colspan="3" extends over three adjacent columns in the same row. For example, a row might include a standard cell, a three-column-wide cell, and another standard cell, such as:

<tr>

<td>Item</td>

<td colspan="3">Summary</td>

<td>Notes</td>

</tr>

The total width of that row is determined by summing the column spans of its cells (in this case, 1 + 3 + 1 = 5). Other rows in the same table should align with that column count, using additional colspans as needed to maintain consistent structure.

Considerations

Colspan3 is useful for creating header or grouping cells that cover multiple data columns, or for layout purposes within a table. When using colspan, ensure the overall column count remains coherent across rows to avoid misalignment. It is also important to preserve accessibility; ensure headers and scope attributes still properly relate to the data cells, and avoid relying solely on spanning for meaning.

Notation and variants

The valid HTML syntax is colspan="3". The term colspan3 (without quotes and equals) is not recognized by the browser as a valid attribute value. In some documentation, templating systems, or CSS-based generators, a shorthand such as colspan3 may appear as a descriptive label or as a class name, but it should not be used as HTML markup.