元素的jquery选择器MISSING子元素

问题描述

我需要帮助形成一个jquery选择器来返回缺少特定子元素的元素。

I am needing help forming a jquery selector to return elements which are missing a particular child element.

给出以下HTML片段：

Given the following HTML fragment:

    <div id="rack1" class="rack">
    <span id="rackunit1" class="rackspace">
        <span id="component1">BoxA</span>
        <span id="label1">Space A</span>
    </span>
    <span id="rackunit2" class="rackspace">
        <span id="label2">Space B</span>
    </span>
    <span id="rackunit3" class="rackspace">
        <span id="component2">BoxA</span>
        <span id="label3">Space C</span>
    </span>
</div>
<div id="rack2" class="rack">
    <span id="rackunit4" class="rackspace">
        <span id="component3">BoxC</span>
        <span id="label4">Space D</span>
    </span>
    <span id="rackunit5" class="rackspace">
        <span id="label5">Space E</span>
    </span>
    <span id="rackunit6" class="rackspace">
        <span id="component4">BoxD</span>
        <span id="label6">Space F</span>
    </span>
</div>

为我找到没有组件跨度的rackunit跨度。
到目前为止，我有：
$（。rack .rackspace）来获取所有机架单元跨度，不确定如何排除具有组件跨度的那些或仅选择那些没有一个。 。

Find for me the rackunit spans with NO component span.Thus far I have:$(".rack .rackspace") to get me all of the rackunit spans, not sure how to either exclude those with a component span or select only those without one...

推荐答案

我想以下情况应该有效：

I guess the following should work:

$(".rack .rackspace:not(:has(span[id^=component]))"). ...

DEMO：

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