de>
              </th>
              <td>
                <code>table</code>
              </td>
              <td>
                <ul>
                  <li>In example 3, specified because a total of 6 columns are available, but when columns are hidden, fewer than 6 columns are visible.</li>
                  <li>Similar to how <code>aria-rowcount</code> overrides the browser calculation of the total number of rows, the browser uses this value for the total number of columns so it can report the correct 