parent() 和 closest() 如何在 jQuery 中工作？

Question

我只想在单击 row 后添加一个 row table，所以我使用了以下代码（实际上我在 visualforce 中使用了这段代码页）。

function queryAndUpdateLead() { 
        var a = $('[id$=ibrahim]').closest('tr')
                .after('<tr><td>New Content 1</td><td>\
                        <a href="#">New Content 2</a></td></tr>');
}

这里的问题是，当我使用 length 属性检查 a 我总是得到 2（我最初有 2 行）

alert('a.length') // this shows 2

我想要的是仅直接父行而不是所有现有行但我不知道为什么它不起作用？

编辑：由 SALESFORCE 服务器呈现的 HTML 代码：

<tbody id="j_id0:j_id3:j_id4:j_id6:tb">
<tr class="dataRow even first" onfocus="if (window.hiOn){hiOn(this);}" onblur="if (window.hiOff){hiOff(this);}" onmouseout="if (window.hiOff){hiOff(this);} " onmouseover="if (window.hiOn){hiOn(this);} ">
**<td id="j_id0:j_id3:j_id4:j_id6:0:ibrahim" class="dataCell " onclick="queryAndUpdateLead();" colspan="1">**
<td id="j_id0:j_id3:j_id4:j_id6:0:j_id7" class="dataCell " colspan="1">
<td id="j_id0:j_id3:j_id4:j_id6:0:j_id8" class="dataCell " colspan="1">
<td id="j_id0:j_id3:j_id4:j_id6:0:j_id9" class="dataCell " colspan="1">
<td id="j_id0:j_id3:j_id4:j_id6:0:j_id10" class="dataCell " colspan="1">
</tr>
<tr class="dataRow odd last" onfocus="if (window.hiOn){hiOn(this);}" onblur="if (window.hiOff){hiOff(this);}" onmouseout="if (window.hiOff){hiOff(this);} " onmouseover="if (window.hiOn){hiOn(this);} ">
<td id="j_id0:j_id3:j_id4:j_id6:1:ibrahim" class="dataCell " onclick="queryAndUpdateLead();" colspan="1">
<td id="j_id0:j_id3:j_id4:j_id6:1:j_id7" class="dataCell " colspan="1">
<td id="j_id0:j_id3:j_id4:j_id6:1:j_id8" class="dataCell " colspan="1">
<td id="j_id0:j_id3:j_id4:j_id6:1:j_id9" class="dataCell " colspan="1">
<td id="j_id0:j_id3:j_id4:j_id6:1:j_id10" class="dataCell " colspan="1">
</tr>
</tbody>
</table>

Answer 1

由于您收集了 $('[id$=ibrahim]') 个元素，您需要使用 $(this) 找到最近的 tr 当前点击的元素并将该内容插入到：

之后

function queryAndUpdateLead() { 
        var $(this).closest('tr')
                .after('<tr><td>New Content 1</td><td>\
                        <a href="#">New Content 2</a></td></tr>');
}

parent() 和 closest() 如何在 jQuery 中工作？

How parent() and closest() work in jQuery?

jquery

html-table

append

rows