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authorPeter Bengtsson <mail@peterbe.com>2020-12-08 14:40:17 -0500
committerPeter Bengtsson <mail@peterbe.com>2020-12-08 14:40:17 -0500
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+---
+title: '::slotted()'
+slug: 'Web/CSS/::slotted'
+translation_of: 'Web/CSS/::slotted'
+---
+<div>{{ CSSRef }}</div>
+
+<p><strong><code>:slotted()</code></strong> <a href="/zh-CN/docs/Web/CSS">CSS</a> <a href="/zh-CN/docs/Web/CSS/Pseudo-elements">伪元素</a> 用于选定那些被放在 HTML模板 中的元素 (更多请查看 <a href="/zh-CN/docs/Web/Web_Components/Using_templates_and_slots">使用模板和插槽</a>).</p>
+
+<p>这个伪类选择器仅仅适用于 <a href="/en-US/docs/Web/Web_Components/Using_shadow_DOM">影子节点树(Shadow Dom)</a>. 并且只会选择实际的元素节点, 而不包括文本节点.</p>
+
+<pre class="brush: css no-line-numbers">/* Selects any element placed inside a slot */
+::slotted(*) {
+  font-weight: bold;
+}
+
+/* Selects any &lt;span&gt; placed inside a slot */
+::slotted(span) {
+  font-weight: bold;
+}
+</pre>
+
+<h2 id="语法">语法</h2>
+
+<pre class="syntaxbox">{{csssyntax}}</pre>
+
+<h2 id="样例">样例</h2>
+
+<p>下面的小片段是关于 <a href="https://github.com/mdn/web-components-examples/tree/master/slotted-pseudo-element">插槽伪类元素</a> 小demo (<a href="https://mdn.github.io/web-components-examples/slotted-pseudo-element/">点击查看实例</a>).</p>
+
+<p>在这个小demo 中, 我们使用一个带有3个插槽的HTML模板:</p>
+
+<pre class="brush: html">&lt;template id="person-template"&gt;
+ &lt;div&gt;
+ &lt;h2&gt;Personal ID Card&lt;/h2&gt;
+ &lt;slot name="person-name"&gt;NAME MISSING&lt;/slot&gt;
+ &lt;ul&gt;
+ &lt;li&gt;&lt;slot name="person-age"&gt;AGE MISSING&lt;/slot&gt;&lt;/li&gt;
+ &lt;li&gt;&lt;slot name="person-occupation"&gt;OCCUPATION MISSING&lt;/slot&gt;&lt;/li&gt;
+ &lt;/ul&gt;
+ &lt;/div&gt;
+&lt;/template&gt;</pre>
+
+<p>自定义元素 <code>&lt;person-details&gt;</code> 的定义如下:</p>
+
+<pre class="brush: js">customElements.define('person-details',
+ class extends HTMLElement {
+ constructor() {
+ super();
+ let template = document.getElementById('person-template');
+ let templateContent = template.content;
+
+ const shadowRoot = this.attachShadow({mode: 'open'});
+
+ let style = document.createElement('style');
+ style.textContent = 'div { padding: 10px; border: 1px solid gray; width: 200px; margin: 10px; }' +
+ 'h2 { margin: 0 0 10px; }' +
+ 'ul { margin: 0; }' +
+ 'p { margin: 10px 0; }' +
+ '::slotted(*) { color: gray; font-family: sans-serif; } ';
+
+ shadowRoot.appendChild(style);
+ shadowRoot.appendChild(templateContent.cloneNode(true));
+ }
+})</pre>
+
+<p>为了更好地区分<strong>未被成功填充的插槽</strong>和<strong>成功填充的插槽</strong>, 我们在CSS中选择了所有的插槽元素(<code>::slotted(*)</code>), 并填充了不一样的颜色和字体. 结果也是如此.</p>
+
+<p>元素就像如下被填充了起来:</p>
+
+<pre class="brush: html">&lt;person-details&gt;
+ &lt;p slot="person-name"&gt;Dr. Shazaam&lt;/p&gt;
+ &lt;span slot="person-age"&gt;Immortal&lt;/span&gt;
+ &lt;span slot="person-occupation"&gt;Superhero&lt;/span&gt;
+&lt;/person-details&gt;</pre>
+
+<h2 id="规范">规范</h2>
+
+<table class="standard-table">
+ <thead>
+ <tr>
+ <th scope="col">Specification</th>
+ <th scope="col">Status</th>
+ <th scope="col">Comment</th>
+ </tr>
+ </thead>
+ <tbody>
+ <tr>
+ <td>{{ SpecName('CSS Scope', '#slotted-pseudo', '::slotted') }}</td>
+ <td>{{ Spec2('CSS Scope') }}</td>
+ <td>Initial definition.</td>
+ </tr>
+ </tbody>
+</table>
+
+<h2 id="Browser_compatibility" name="Browser_compatibility">浏览器兼容性</h2>
+
+
+
+<p>{{Compat("css.selectors.slotted")}}</p>
+
+<h2 id="参考">参考</h2>
+
+<ul>
+ <li><a href="/en-US/docs/Web/Web_Components">Web components</a></li>
+</ul>