$(function() {
  $(".empty").each(hideCellIfEmpty);
});

function hideCellIfEmpty() {
  var theCell = $(this);
  if (theCell.html().length == 0) {
    hideSoft(theCell);
  }
}

function hideSoft(jQElement) {
  jqElement.css('visibility','hidden');
}

table.empty {
  width: 350px;
  border-collapse: collapse;
  empty-cells: hide;
}
td.empty {
  border-style: solid;
  border-width: 1px;
  border-color: blue;
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js"></script>
<table class="empty">
  <tr>
    <th></th>
    <th>Title one</th>
    <th>Title two</th>
  </tr>
  <tr>
    <th>Row Title</th>
    <td class="empty">value</td>
    <td class="empty">value</td>
  </tr>
  <tr>
    <th>Row Title</th>
    <td class="empty">value</td>
    <td class="empty"></td>
  </tr>
</table>

你可以看到,第二行显示空单元格.但我想隐藏它.而且,我不想使用border-collapse：单独的.这是否可以使用border-collapse隐藏空单元格：崩溃？我也想知道为什么这会显示空单元格.

附：使用border-collapse：单独工作,不显示空单元格.

$(function() {
  $(".empty").each(hideCellIfEmpty);
});

function hideCellIfEmpty() {
  var theCell = $(this);
  if (theCell.html().length == 0) {
    hideSoft(theCell);
  }
}

function hideSoft(jQElement) {
  jqElement.css('visibility','hidden');
}

table.empty {
  width: 350px;
  border-collapse: separate;
  empty-cells: hide;
}
td.empty {
  border-style: solid;
  border-width: 1px;
  border-color: blue;
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js"></script>
<table class="empty">
  <tr>
    <th></th>
    <th>Title one</th>
    <th>Title two</th>
    <th>Title three</th>
  </tr>
  <tr>
    <th>Row Title</th>
    <td class="empty">value</td>
    <td class="empty">value</td>
    <td class="empty">value</td>
  </tr>
  <tr>
    <th>Row Title</th>
    <td class="empty">value</td>
    <td class="empty"></td>
    <td class="empty">value</td>
  </tr>
</table>

但这并没有回答这些问题：

>为什么在边界折叠时显示空单元格：使用折叠？
>为什么边框折叠时不显示空单元格：使用单独的？