html - 从 N 开始的颜色表列 (td :nth-of-type)

Question

我想从某列开始添加某种背景颜色。不必为每一列使用 css 类，如果可能的话，我宁愿使用其他方式。

我将有一个包含数百行和大约 25 列的巨大表格，我希望避免不必要的代码。

目前，我正在使用 td:nth-of-type 属性来做到这一点:

.demo tr.selectedRow td:nth-of-type(9),
.demo tr.selectedRow td:nth-of-type(10),
.demo tr.selectedRow td:nth-of-type(11),
.demo tr.selectedRow td:nth-of-type(12),
.demo tr.selectedRow td:nth-of-type(13),
.demo tr.selectedRow td:nth-of-type(14),
.demo tr.selectedRow td:nth-of-type(15),
.demo tr.selectedRow td:nth-of-type(16) {
  background-color: #fff16b;
}

<table border="1" class="demo">
  <tr>
    <td>not selected</td>
  </tr>
  <tr class="selectedRow">
    <td>not selected</td>
    <td>not selected</td>
    <td>not selected</td>
    <td>not selected</td>
    <td>not selected</td>
    <td>not selected</td>
    <td>not selected</td>
    <td>not selected</td>
    <td>selected</td>
    <td>selected</td>
    <td>selected</td>
    <td>selected</td>
    <td>selected</td>
    <td>selected</td>
    <td>selected</td>
    <td>selected</td>
    <td>selected</td>
    <td>selected</td>
  </tr>
  <tr>
    <td>not selected</td>
  </tr>
  <tr>
    <td>not selected</td>
  </tr>
  <tr>
    <td>not selected</td>
  </tr>
  <tr>
    <td>not selected</td>
  </tr>
  <tr>
    <td>not selected</td>
  </tr>
  <tr>
    <td>not selected</td>
  </tr>
</table>

我想知道是否有任何方法可以进一步减少这种情况。

The documentation不多说了……

Answer 1

http://css-tricks.com/examples/nth-child-tester/这个测试仪真的可以提供帮助。看起来您想选择 9 之后的所有内容，因此请使用下面的代码

选择除前 8 个之外的所有 TD

.demo tr.selectedRow td:nth-child(n+9) {
  color: red;
}

<table border="1" class="demo">
  <tr>
    <td>not selected</td>
  </tr>
  <tr class="selectedRow">
    <td>not selected</td>
    <td>not selected</td>
    <td>not selected</td>
    <td>not selected</td>
    <td>not selected</td>
    <td>not selected</td>
    <td>not selected</td>
    <td>not selected</td>
    <td>selected</td>
    <td>selected</td>
    <td>selected</td>
    <td>selected</td>
    <td>selected</td>
    <td>selected</td>
    <td>selected</td>
    <td>selected</td>
    <td>selected</td>
    <td>selected</td>
  </tr>
  <tr>
    <td>not selected</td>
  </tr>
  <tr>
    <td>not selected</td>
  </tr>
  <tr>
    <td>not selected</td>
  </tr>
  <tr>
    <td>not selected</td>
  </tr>
  <tr>
    <td>not selected</td>
  </tr>
  <tr>
    <td>not selected</td>
  </tr>
</table>