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+---
+title: ':empty'
+slug: 'Web/CSS/:empty'
+tags:
+  - ':empty'
+  - CSS
+  - CSS 骨架效果
+  - CSS伪类
+  - Layout
+  - css skeleton
+  - skelenton
+  - 参考
+  - 布局
+  - 网络
+translation_of: 'Web/CSS/:empty'
+---
+<div>{{ CSSRef()}}</div>
+
+<p><code>:empty</code> <a href="https://developer.mozilla.org/en-US/docs/Web/CSS">CSS</a> <a href="/zh-CN/CSS/Pseudo-classes" title="Pseudo-classes">伪类</a> 代表没有子元素的元素。子元素只可以是元素节点或文本（包括空格）。注释或处理指令都不会产生影响。</p>
+
+<pre class="brush: css no-line-numbers">/* Selects any &lt;div&gt; that contains no content */
+div:empty {
+  background: lime;
+}</pre>
+
+<h2 id="Syntax" name="Syntax">语法</h2>
+
+<pre class="syntaxbox">{{csssyntax}}
+</pre>
+
+<h2 id="Examples" name="Examples">例子</h2>
+
+<h3 id="HTML">HTML</h3>
+
+<pre class="brush: html">&lt;div class="box"&gt;&lt;!-- I will be lime --&gt;&lt;/div&gt;
+&lt;div class="box"&gt;I will be pink&lt;/div&gt;
+&lt;div class="box"&gt;
+    &lt;!-- I will be red because of the whitespace around this comment --&gt;
+&lt;/div&gt;</pre>
+
+<h3 id="CSS">CSS</h3>
+
+<div class="hidden">
+<pre class="brush: css">body {
+  display: flex;
+  justify-content: space-around;
+}</pre>
+</div>
+
+<pre class="brush: css">.box {
+    background: pink;
+    height: 80px;
+    width: 80px;
+}
+
+.box:empty {
+    background: lime;
+}
+</pre>
+
+<h3 id="Result">Result</h3>
+
+<p>{{EmbedLiveSample('Examples', 300, 80)}}</p>
+
+<h2 id="Specifications" name="Specifications">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 Selectors', '#empty-pseudo', ':empty') }}</td>
+   <td>{{ Spec2('CSS4 Selectors') }}</td>
+   <td>No change.</td>
+  </tr>
+  <tr>
+   <td>{{ SpecName('CSS3 Selectors', '#empty-pseudo', ':empty') }}</td>
+   <td>{{ Spec2('CSS3 Selectors') }}</td>
+   <td>Initial definition.</td>
+  </tr>
+ </tbody>
+</table>
+
+<h2 id="浏览器兼容">浏览器兼容</h2>
+
+
+
+<p>{{Compat("css.selectors.empty")}}</p>
+
+<h2 id="参考">参考</h2>
+
+<ul>
+ <li>{{CSSxRef(":blank")}}</li>
+</ul>
+
+<h3 id="example">example</h3>
+
+<p><a href="https://codepen.io/xgqfrms/full/zQEJWw">https://codepen.io/xgqfrms/full/zQEJWw</a></p>
+
+<p> </p>