W3C驗證器（維基百科）不喜歡在非空元素上使用自閉合標籤（以“/>”結尾的標籤）。 （空元素是那些永遠不會包含任何內容的元素。）它們在HTML5中是否仍然有效？

一些被接受的空元素範例：

一些被拒絕的非空元素範例：

   </pre> <sub> <b>注意：</b> <p><br /></p><p> W3C驗證器實際上接受空的自閉合標籤：作者最初遇到問題是因為簡單的拼字錯誤（使用了<code>></code>而不是<code>/></code> ;）；然而，自閉合標籤在HTML5中並不完全有效，答案詳細闡述了不同HTML版本中的自閉合標籤問題。 </p></sub>
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          <a href="//m.sbmmt.com/zh-tw/member/1271912.html" target="_blank" class="wdcdcName">P粉762730205<b class="wdxqRcT colorGrey">2023-08-22 12:17:28</b></a>
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          <p>自閉合的div將無法驗證。這是因為div是一個<strong>普通元素</strong>，而不是一個<strong>空元素</strong>。</p>
          <p>根據<a href="https://html.spec.whatwg.org/multipage/syntax.html" rel="noreferrer">HTML5規格</a>，不能包含任何內容的標籤（稱為<strong>空白元素</strong>）可以自閉合*。這包括以下標籤：</p>
          <pre class="brush:php;toolbar:false;">area, base, br, col, embed, hr, img, input, link, meta, param, source, track, wbr</pre>
          <p>上述標籤上的「/」是完全可選的，因此<code><img/></code>與<code><img></code>沒有區別，但<code><img> ;</img></code>是無效的。</p>
          <p>*注意：<strong>外部元素</strong>也可以自閉合，但我認為這不在本答案的範圍內。</p>
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