javascript - 使用 jQuery 为表的第二列添加类

Question

<table>
    <tr><td>aaa</td><td>ccc</td><td>aaa</td><td>aaa</td><td>bbb</td><td>aaa</td><td>aaa</td></tr>
    <tr><td>aaa</td><td>ccc</td><td>aaa</td><td>aaa</td><td>bbb</td><td>aaa</td><td>aaa</td></tr>
    <tr><td>aaa</td><td>ccc</td><td>aaa</td><td>aaa</td><td>bbb</td><td>aaa</td><td>aaa</td></tr>
    <tr><td>aaa</td><td>ccc</td><td>aaa</td><td>aaa</td><td>bbb</td><td>aaa</td><td>aaa</td></tr>
    <tr><td>aaa</td><td>ccc</td><td>aaa</td><td>aaa</td><td>bbb</td><td>aaa</td><td>aaa</td></tr>
</table>

table td {
    background-color: green;
    padding: 5px;
    border: 1px solid blue;
}

.red {
   background-color: red;
}

直播: http://jsfiddle.net/zCduV/1/

我如何为该表的第二列添加带有 jQ​​uery 的 .red 类(在此示例中，这是 td 中 ccc 的位置)？

Answer 1

这可能是？

// selects both table header and table data cells from the second column of the table
$('table th:nth-child(2), table td:nth-child(2)').addClass('red');

http://jsfiddle.net/tdTkQ/