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+---
+title: '::selection'
+slug: 'Web/CSS/::selection'
+tags:
+  - CSS
+  - Layout
+translation_of: 'Web/CSS/::selection'
+---
+<p>{{ CSSRef() }}</p>
+
+<p><strong><code>::selection</code></strong> CSS伪元素应用于文档中被用户高亮的部分（比如使用鼠标或其他选择设备选中的部分）。</p>
+
+<pre class="brush: css">::selection {
+  background-color: cyan;
+}
+</pre>
+
+<h2 id="允许属性">允许属性</h2>
+
+<p>只有一小部分CSS属性可以用于<code>::selection</code> 选择器：</p>
+
+<ul>
+ <li>{{CSSxRef("color")}}</li>
+ <li>{{CSSxRef("background-color")}}</li>
+ <li>{{CSSxRef("cursor")}}</li>
+ <li>{{CSSxRef("caret-color")}}</li>
+ <li>{{CSSxRef("outline")}} and its longhands</li>
+ <li>{{CSSxRef("text-decoration")}} and its associated properties</li>
+ <li>{{CSSxRef("text-emphasis-color")}}</li>
+ <li>{{CSSxRef("text-shadow")}}</li>
+</ul>
+
+<div class="blockIndicator warning">
+<p>要特别注意的是，{{ cssxref("background-image") }} 会如同其他属性一样被忽略。</p>
+</div>
+
+<h2 id="语法">语法</h2>
+
+<pre class="syntaxbox">/* Legacy Firefox syntax (version 61 and below) */
+::-moz-selection
+
+{{CSSSyntax}}
+</pre>
+
+<h2 id="示例">示例</h2>
+
+<h3 id="HTML">HTML</h3>
+
+<pre class="brush: html">This text has special styles when you highlight it.
+&lt;p&gt;Also try selecting text in this paragraph.&lt;/p&gt;</pre>
+
+<h3 id="CSS">CSS</h3>
+
+<pre class="brush: css">::-moz-selection {
+  color: gold;
+  background-color: red;
+}
+
+p::-moz-selection {
+  color: white;
+  background-color: blue;
+}</pre>
+
+<pre class="brush: css">/* 选中的文本是红色背景，金黄色的字体 */
+::selection {
+  color: gold;
+  background-color: red;
+}
+
+/*选中的是蓝色背景，白色的字体的段落*/
+p::selection {
+  color: white;
+  background-color: blue;
+}</pre>
+
+<h3 id="结果">结果</h3>
+
+<p>{{EmbedLiveSample('示例')}}</p>
+
+<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('CSS4 Pseudo-Elements', '#selectordef-selection', '::selection')}}</td>
+   <td>{{ Spec2('CSS4 Pseudo-Elements')}}</td>
+   <td>Initial specification</td>
+  </tr>
+ </tbody>
+</table>
+
+<div class="blockIndicator note">
+<p><code>::selection</code> CSS伪元素选择器是CSS第3级选择器的草案，但是在被推荐使用前就被废弃。它现在在第4级伪元素选择器草案中。</p>
+</div>
+
+<h2 id="浏览器兼容性">浏览器兼容性</h2>
+
+<p>{{Compat("css.selectors.selection")}}</p>