為什麼在嵌套元素上nth-of-type / nth-child選擇器無效?
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P粉662802882 2023-08-24 14:50:42
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<p>我正在嘗試更改包含在一個div中的奇數個div的樣式。但奇數個div的樣式選擇器<code>nth-of-type(odd)</code>包含在另一個div中時會影響到所有的div。以下是我普通的div和奇數個div的程式碼:</p> <p><br /></p> <pre class="brush:css;toolbar:false;">.video-entry-summary { width: 214px; height: 210px; margin-left: 10px; float: left; position: relative; overflow: hidden; border: 1px solid black; } .video-entry-summary:nth-of-type(odd) { width: 214px; height: 210px; margin-left: 0px; float: left; position: relative; overflow: hidden; border: 1px solid black; background: #ccc; }</pre> <pre class="brush:html;toolbar:false;"><div id="post-501" class="post-501 post type-post status-publish format-standard hentry category-moto-dz- films tag-news-sub-2"> <div class="video-entry-summary"> video 1 </div> </div> <div id="post-240" class="post-240 post type-post status-publish format-standard hentry category-videos"> <div class="video-entry-summary"> video 2 </div> </div> <div id="post-232" class="post-232 post type-post status-publish format-standard hentry category-videos"> <div class="video-entry-summary"> video 3 </div> </div> <div id="post-223" class="post-223 post type-post status-publish format-standard hentry category-videos"> <div class="video-entry-summary"> video 4 </div> </div></pre> <p><br /></p> <p>由於某種原因,當包含在我的div中時,<code>nth-of-type</code>選擇器無法工作,但當它們不包含在任何div中時可以工作。 </p> <p><strong>不包含在div中時的工作版本:</strong></p> <p><br /></p> <pre class="brush:css;toolbar:false;">.video-entry-summary { width: 214px; height: 210px; margin-left: 10px; float: left; position: relative; overflow: hidden; border: 1px solid black; } .video-entry-summary:nth-of-type(odd) { width: 214px; height: 210px; margin-left: 0px; float: left; position: relative; overflow: hidden; border: 1px solid black; background: #ccc; }</pre> <pre class="brush:html;toolbar:false;"><div class="video-entry-summary"> video 1 </div> <div class="video-entry-summary"> video 2 </div> <div class="video-entry-summary"> video 3 </div> <div class="video-entry-summary"> video 4 </div></pre> <p><br /></p> <p>如何讓初始程式碼與上述程式碼相同? </p>
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:nth-of-type():nth-child()類似,它們都必須來自同一個父元素。如果你需要這些包裝的div,則應該在這些包裝器上使用:nth-of-type()

div.post:nth-of-type(odd) .video-entry-summary {
    width:214px; 
    height:210px; 
    margin-left:0px;
    float:left;
    position:relative; 
    overflow:hidden; 
    border:1px solid black; 
    background:#ccc; 
}

如果所有的兄弟元素都是.post,則應該使用:nth-child()來避免與#: nth-of-type()的真正意義混淆:

.post:nth-child(odd) .video-entry-summary {
    width:214px; 
    height:210px; 
    margin-left:0px;
    float:left;
    position:relative; 
    overflow:hidden; 
    border:1px solid black; 
    background:#ccc; 
}

.video-entry-summary {
  width: 214px;
  height: 210px;
  margin-left: 10px;
  float: left;
  position: relative;
  overflow: hidden;
  border: 1px solid black;
}

.post:nth-child(odd) .video-entry-summary {
  width: 214px;
  height: 210px;
  margin-left: 0px;
  float: left;
  position: relative;
  overflow: hidden;
  border: 1px solid black;
  background: #ccc;
}
<div id="post-501" class="post-501 post type-post status-publish format-standard hentry category-moto-dz-films tag-news-sub-2">
  <div class="video-entry-summary">
    video 1
  </div>
</div>

<div id="post-240" class="post-240 post type-post status-publish format-standard hentry category-videos">
  <div class="video-entry-summary">
    video 2
  </div>
</div>

<div id="post-232" class="post-232 post type-post status-publish format-standard hentry category-videos">
  <div class="video-entry-summary">
    video 3
  </div>
</div>

<div id="post-223" class="post-223 post type-post status-publish format-standard hentry category-videos">
  <div class="video-entry-summary">
    video 4
  </div>
</div>
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