是否可以在表格行中使用伪元素(:after，:before)?

我想将绝对定位的元素添加为表行的:after (属于:before ).

I want to add absolutely positioned element as an :after (of :before) of a table row.

看看这个:

table {
  border: 1px dotted gray;
  border-collapse: collapse;
  border-spacing: 0;
  td {
    padding: 0;
    margin: 0;
    width: 100px;
    background: rgba(255, 0, 0, 0.2)
  }
}

table.a .special::before {
  content: 'a';
}

table.b .special::before {
  content: 'a';
  display: block;
  position: absolute;
  right: 10px;
}

table.c .special::after {
  content: 'a';
  display: block;
  position: absolute;
  right: 10px;
}

table.d .special .after {
  display: block;
  position: absolute;
  right: 10px;
  top: 0;
}

<table>
  <tr>
    <td>1</td>
    <td>2</td>
    <td>3</td>
  </tr>
  <tr class='special'>
    <td>1</td>
    <td>2</td>
    <td>3</td>
  </tr>
</table>
<br/>
<table class="a">
  <tr>
    <td>1</td>
    <td>2</td>
    <td>3</td>
  </tr>
  <tr class='special'>
    <td>1</td>
    <td>2</td>
    <td>3</td>
  </tr>
</table>
<br/>
<table class="b">
  <tr>
    <td>1</td>
    <td>2</td>
    <td>3</td>
  </tr>
  <tr class='special'>
    <td>1</td>
    <td>2</td>
    <td>3</td>
  </tr>
</table>
<br/>
<table class="c">
  <tr>
    <td>1</td>
    <td>2</td>
    <td>3</td>
  </tr>
  <tr class='special'>
    <td>1</td>
    <td>2</td>
    <td>3</td>
  </tr>
</table>
<Br/>
<table class="d">
  <tr>
    <td>1</td>
    <td>2</td>
    <td>3</td>
  </tr>
  <tr class='special'>
    <td>1</td>
    <td>2</td>
    <td>3</td>
    <div class='after'>a</div>
  </tr>
</table>

我假设添加这样的元素时，呈现引擎(至少基于Webkit)认为它是某种类型的表格单元.

I assume that when I add such an element, the rendering engine (at least Webkit based) thinks it is a table cell of some kind.

:before 在所有浏览器中均无法正常运行.但是:after 在Firefox中效果很好，而在webkit中效果很好.在webkit中，它保留了很小的空间，并使整个表的宽度变大了.

:before works badly in all browsers. But :after works very well in Firefox and almost good in webkit. In webkit it keeps a small space and makes the whole table width bigger.

-这是困扰Webkit的原因.

- This is what bothers me in webkit.

如何解决此问题?我在哪里可以知道为什么会发生这种情况?

How to fix this? And where can I read about why it is happening?