---
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>