empty-cells

empty-cells: show;

empty-cells: hide;

<section class="default-example" id="default-example">
  <table class="transition-all" id="example-element">
    <tr>
      <th>顧客名</th>
      <th>年齢</th>
    </tr>
    <tr>
      <td></td>
      <td>25</td>
    </tr>
    <tr>
      <td>Louise Q.</td>
      <td></td>
    </tr>
    <tr>
      <td>Owen B.</td>
      <td></td>
    </tr>
    <tr>
      <td>Stan L.</td>
      <td>71</td>
    </tr>
  </table>
</section>

th,
td {
  border: 2px solid #a19;
  padding: 0.25rem 0.5rem;
}

/* キーワード値 */
empty-cells: show;
empty-cells: hide;
/* グローバル値 */
empty-cells: inherit;
empty-cells: initial;
empty-cells: revert;
empty-cells: revert-layer;
empty-cells: unset;

<table class="table_1">
  <tr>
    <td>Moe</td>
    <td>Larry</td>
  </tr>
  <tr>
    <td>Curly</td>
    <td></td>
  </tr>
</table>
<br />
<table class="table_2">
  <tr>
    <td>Moe</td>
    <td>Larry</td>
  </tr>
  <tr>
    <td>Curly</td>
    <td></td>
  </tr>
</table>

.table_1 {
  empty-cells: show;
}
.table_2 {
  empty-cells: hide;
}
td,
th {
  border: 1px solid gray;
  padding: 0.5rem;
}