css – 有条件地根据其他类的存在隐藏元素

2023年5月8日 213次阅读

我从外部源获取
HTML并且无法更改代码,因此为了获得我们需要的结果,我需要有条件地隐藏内容.

在这个例子中,我有一个0级和1级,我需要在h2上设置display：none(在这种情况下是财务).

<section class="level-0">
<h2 id="4001567002">Finance</h2>
<section class="child level-1">
    <h2 id="4008036002">Fusion</h2>
        <div class="opening" department_id="4001567002,4008036002" office_id="4000758002" data-office-4000758002="true" data-department-4001567002="true" data-department-4008036002="true">
        <a data-mapped="true" target="_top" href="google.com">Business Systems Executive</a>
        <br>
        <span class="location">Sydney</span>
    </div>
</section>

可能是没有level-1,在这种情况下,level-0标头应该是可见的：

<section class="level-0">
<h2 id="4008036002">Fusion</h2>
    <div class="opening" department_id="4001567002,4008036002" office_id="4000758002" data-office-4000758002="true" data-department-4001567002="true" data-department-4008036002="true">
    <a data-mapped="true" target="_top" href="google.com">Business Systems Executive</a>
    <br>
    <span class="location">Sydney</span>
</div>

ID是不可预测的,因此我无法隐藏基于此的级别.

这在纯CSS中是可能的还是我应该提出另一种解决方案？

最佳答案 我无法用Pure CSS做你想做的事情,我不认为这是可能的,因为你不能在CSS中添加条件语句.

请在下面找到一个带有一点jquery的解决方案：

var count = $(".level-0").length +1;

for (i = 1; i < count; i++) { 
  if ($(".level-1").parents('.container > .level-0:nth-of-type(' + i + ')').length == 1) {
    $( '.level-0:nth-of-type(' + i + ')').addClass( "has-lv1" );
  } else {
    $( '.level-0:nth-of-type(' + i + ')').addClass( "no-lv1" );
  }
}
.container {
  border: solid 1px black;
  padding: 20px;
  background-color: lightblue;
}

.container > h2{
  color: green;
}

.has-lv1 > h2 {
  display: none;
}

.no-lv1 > h2 {
  display: block;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class="container">
<h2>Example with <strong>Level 1</strong></h2>
  <section class="level-0">
    <h2 id="4001567002">Finance</h2>
    <section class="child level-1">
      <h2 id="4008036002">Fusion</h2>
      <div class="opening" department_id="4001567002,4008036002" office_id="4000758002" data-office-4000758002="true" data-department-4001567002="true" data-department-4008036002="true">
        <a data-mapped="true" target="_top" href="google.com">Business Systems Executive</a>
        <br>
        <span class="location">Sydney</span>
      </div>
    </section>
  </section>
<hr>
<h2>Example without <strong>Level 1</strong></h2>
  <section class="level-0">
    <h2 id="4001567002">Finance</h2>
  </section>
</div>

我希望这有帮助

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