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+---
+title: '::-webkit-progress-bar'
+slug: 'Web/CSS/::-webkit-progress-bar'
+tags:
+  - CSS
+  - 非标准特性
+translation_of: 'Web/CSS/::-webkit-progress-bar'
+---
+<div>{{CSSRef}}{{Non-standard_header}}</div>
+
+<h2 id="概述">概述</h2>
+
+<p><strong><code>::-webkit-progress-bar</code></strong> <a href="/en-US/docs/Web/CSS">CSS</a> <a href="/en-US/docs/Web/CSS/Pseudo-elements">伪元素</a> 选择 {{HTMLElement("progress")}} 元素的未完成部分。 {{ cssxref("::-webkit-progress-value") }} 选择完成的部分。<strong><code>::-webkit-progress-bar</code></strong> 是{{cssxref("::-webkit-progress-inner-element")}} 伪元素的子元素，同时是 {{cssxref("::-webkit-progress-value")}} 伪元素的父元素。</p>
+
+<div class="note">
+<p><strong>Note:</strong> 为了能让<code>::-webkit-progress-value</code>起作用,需要添加CSS {{cssxref("-webkit-appearance")}} 至 <code>&lt;progress&gt;</code> 元素.</p>
+</div>
+
+<h2 id="规范">规范</h2>
+
+<p>没有规范。这是一个 WebKit/Blink 独有的规范。</p>
+
+<h2 id="例子">例子</h2>
+
+<h3 id="CSS_content">CSS content</h3>
+
+<pre class="brush: css notranslate">progress {
+  -webkit-appearance: none;
+}
+
+::-webkit-progress-bar {
+   background-color: orange;
+}
+</pre>
+
+<h3 id="HTML_content">HTML content</h3>
+
+<pre class="brush: html notranslate">&lt;progress value="10" max="50"&gt;
+</pre>
+
+<h3 id="Output">Output</h3>
+
+<p>{{EmbedLiveSample("Example", 200, 50)}}</p>
+
+<p>应用了上述样式的进度条样式如下：</p>
+
+<p><img alt="" src="https://mdn.mozillademos.org/files/13488/progress-bar.png" style="height: 43px; width: 194px;"></p>
+
+<h2 id="浏览器兼容性">浏览器兼容性</h2>
+
+<p>{{CompatibilityTable}}</p>
+
+<div id="compat-desktop">
+<table class="compat-table">
+ <tbody>
+  <tr>
+   <th>Feature</th>
+   <th>Firefox (Gecko)</th>
+   <th>Chrome</th>
+   <th>Internet Explorer</th>
+   <th>Opera</th>
+   <th>Safari</th>
+  </tr>
+  <tr>
+   <td>Basic support</td>
+   <td>{{CompatNo}}</td>
+   <td>{{CompatVersionUnknown}}</td>
+   <td>{{CompatNo}}</td>
+   <td>{{CompatVersionUnknown}}</td>
+   <td>{{CompatVersionUnknown}}</td>
+  </tr>
+ </tbody>
+</table>
+</div>
+
+<div id="compat-mobile">
+<table class="compat-table">
+ <tbody>
+  <tr>
+   <th>Feature</th>
+   <th>Firefox Mobile (Gecko)</th>
+   <th>Android</th>
+   <th>IE Phone</th>
+   <th>Opera Mobile</th>
+   <th>Safari Mobile</th>
+  </tr>
+  <tr>
+   <td>Basic support</td>
+   <td>{{CompatNo}}</td>
+   <td>{{CompatVersionUnknown}}</td>
+   <td>{{CompatNo}}</td>
+   <td>{{CompatVersionUnknown}}</td>
+   <td>{{CompatVersionUnknown}}</td>
+  </tr>
+ </tbody>
+</table>
+</div>
+
+<h2 id="参见">参见</h2>
+
+<ul>
+ <li>The pseudo-elements used by WebKit/Blink to style other parts of a {{HTMLElement("progress")}} element:
+  <ul>
+   <li>{{ cssxref("::-webkit-progress-value") }}</li>
+   <li>{{ cssxref("::-webkit-progress-inner-element") }}</li>
+  </ul>
+ </li>
+ <li>{{ cssxref("::-moz-progress-bar") }}</li>
+ <li>{{ cssxref("::-ms-fill") }}</li>
+</ul>