隐藏表格中的空单元格

Question

我想在表格中隐藏空单元格.这是我的代码:

$(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,我不想用border-collapse:separate.是否可以使用隐藏空单元格border-collapse:collapse？我也想知道为什么这会显示空单元格.

PS使用border-collapse: separate正在工作,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:

1. 为何使用空单元格border-collapse: collapse？

2. 使用时为什么不显示空单元格border-collapse: separate？

Answer 1

如果您的站点不需要IE 8及以下版本的支持,您可以使用CSS :empty伪类:

td:empty {
  visibility: hidden;
}

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

<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>

有关:empty伪类的更多信息,请访问https://developer.mozilla.org/en-US/docs/Web/CSS/:empty