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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: HTMLImageElement.decoding
+slug: Web/API/HTMLImageElement/decoding
+translation_of: Web/API/HTMLImageElement/decoding
+---
+<div>{{APIRef}}</div>
+
+<div>{{domxref("HTMLImageElement")}} 接口的 <strong><code>decoding</code></strong> 属性用于告诉浏览器使用何种方式解析图像数据。</div>
+
+<h2 id="Syntax">Syntax</h2>
+
+<pre class="syntaxbox"><var>refStr</var> = <var>imgElem</var>.decoding;
+<var>imgElem</var>.decoding = <var>refStr</var>;</pre>
+
+<h3 id="Values">Values</h3>
+
+<p>使用 {{domxref("DOMString")}} 表示解码方式. 可使用以下值:</p>
+
+<dl>
+ <dd>
+ <ul>
+ <li><strong><code>sync</code></strong>: 同步解码图像,保证与其他内容一起显示。</li>
+ <li><strong><code>async</code></strong>: 异步解码图像,加快显示其他内容。</li>
+ <li><strong><code>auto</code></strong>: 默认模式,表示不偏好解码模式。由浏览器决定哪种方式更适合用户。</li>
+ </ul>
+ </dd>
+</dl>
+
+<h2 id="Usage_notes">Usage notes</h2>
+
+<p><code>decoding</code> 属性使您可以控制是否允许浏览器尝试异步加载图像。如果这样做会引起问题,您可指定值为 <code>sync</code> 禁止异步加载。异步加载对 {{HTMLElement("img")}} 元素很有用,对屏幕外的图像对象可能会更有用。</p>
+
+<h2 id="Examples">Examples</h2>
+
+<pre class="brush: js;highlight:[3]">var img = new Image();
+img.decoding = 'sync';
+img.src = 'img/logo.png';
+</pre>
+
+<h2 id="Specifications" name="Specifications">Specifications</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('HTML WHATWG', 'embedded-content.html#dom-img-decoding', 'decoding')}}</td>
+ <td>{{Spec2('HTML WHATWG')}}</td>
+ <td></td>
+ </tr>
+ </tbody>
+</table>
+
+<h2 id="Browser_compatibility" name="Browser_compatibility">Browser compatibility</h2>
+
+
+
+<p>{{Compat("api.HTMLImageElement.decoding")}}</p>