描述细节元素中是否允许无序列表元素?

Is an unordered list element allowed inside a description details element?

dd 元素可以包含 ul 元素吗?像这样:

<dl>
  <dt>Lorem</dt>
  <dd>Sed lectus</dd>
  <dt>Vestibulum</dt>
  <dd>
    <ul>
      <li>viverra nec</li>
      <li>blandit vel</li>
      <li>egestas et</li>
    </ul>
  </dd>
  <dt>Suspendisse</dt>
  <dd>Nulla quam</dd>
</dl>

是的,<dd> 包含 <ul> 是有效的。根据HTML Spec, <dd> elements should contain flow content。无序列表被认为是流内容。

但是,如果您的示例中的每个项目都是后续 <dt> 术语的替代描述,则它们 不应 在无序列表中标记,并且应该而是使用一系列 <dd> 元素进行标记。

例如,以下是有效的 HTML,但 语义不正确——因为它暗示整个列表是该术语的单数描述。

<dl>
  <dt>Firefox</dt>
  <dd>
    <ul>
      <li>A free, open source, cross-platform, graphical web browser developed by the Mozilla Corporation and hundreds of volunteers.</li>
      <li>The Red Panda also known as the Lesser Panda, Wah, Bear Cat or Firefox, is a mostly herbivorous mammal, slightly larger than a domestic cat (60 cm long).</li>
    </ul>
  </dd>
</dl>

标记此内容的有效和语义正确方式是:

<dl>
  <dt>Firefox</dt>
  <dd>A free, open source, cross-platform, graphical web browser developed by the Mozilla Corporation and hundreds of volunteers.</dd>
  <dd>The Red Panda also known as the Lesser Panda, Wah, Bear Cat or Firefox, is a mostly herbivorous mammal, slightly larger than a domestic cat (60 cm long).</dd>
</dl>