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---
title: HTMLCanvasElement.transferControlToOffscreen()
slug: Web/API/HTMLCanvasElement/transferControlToOffscreen
tags:
- Canvas
- Web图形技术
- 离屏Canvas
translation_of: Web/API/HTMLCanvasElement/transferControlToOffscreen
---
<div>{{APIRef("Canvas API")}} {{SeeCompatTable}}</div>
<p>方法 <code><strong>HTMLCanvasElement</strong></code><strong><code>.transferControlToOffscreen()</code></strong> 将控制转移到一个在主线程或者web worker的 {{domxref("OffscreenCanvas")}} 对象上。</p>
<h2 id="用法">用法</h2>
<pre class="syntaxbox notranslate">OffscreenCanvas HTMLCanvasElement.transferControlToOffscreen()</pre>
<h3 id="返回值">返回值</h3>
<p>一个 {{domxref("OffscreenCanvas")}} 对象。</p>
<h2 id="样例">样例</h2>
<pre class="brush: js notranslate">var htmlCanvas = document.createElement('canvas');
var offscreen = htmlCanvas.transferControlToOffscreen();
var gl = offscreen.getContext('webgl');
// ... some drawing using the gl context ...
// Push frames back to the original HTMLCanvasElement
gl.commit();
</pre>
<h2 id="规范">规范</h2>
<table class="standard-table">
<tbody>
<tr>
<th scope="col">Specification</th>
<th scope="col">Status</th>
<th scope="col">Comment</th>
</tr>
<tr>
<td>{{SpecName('HTML WHATWG', "canvas.html#dom-canvas-transfercontroltooffscreen", "HTMLCanvasElement.transferControlToOffscreen()")}}</td>
<td>{{Spec2('HTML WHATWG')}}</td>
<td></td>
</tr>
</tbody>
</table>
<h2 id="浏览器兼容性">浏览器兼容性</h2>
<div>
<p>{{Compat("api.HTMLCanvasElement.transferControlToOffscreen")}}</p>
</div>
<h2 id="查阅">查阅</h2>
<ul>
<li>The interface defining this method, {{domxref("HTMLCanvasElement")}}</li>
<li>{{domxref("OffscreenCanvas")}}</li>
<li>{{domxref("WebGLRenderingContext.commit()")}}</li>
</ul>
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