---
title: VRDisplay.requestAnimationFrame()
slug: Web/API/VRDisplay/requestAnimationFrame
translation_of: Web/API/VRDisplay/requestAnimationFrame
---
<div>{{APIRef("WebVR API")}}{{SeeCompatTable}}</div>

<p>The <code><strong>requestAnimationFrame()</strong></code> method of the {{domxref("VRDisplay")}} interface is a special implementation of {{domxref("Window.requestAnimationFrame")}} containing a callback function that will be called every time a new frame of the <code>VRDisplay</code> presentation is rendered:</p>

<ul>
 <li>When the <code>VRDisplay</code> is not presenting a scene, this is functionally equivalent to {{domxref("Window.requestAnimationFrame")}}.</li>
 <li>When the VRDisplay is presenting, the callback is called at the native refresh rate of the <code>VRDisplay</code>.</li>
</ul>

<h2 id="Syntax">Syntax</h2>

<pre class="brush: js">var handle = vrDisplayInstance.requestAnimationFrame(<em>callback</em>);
</pre>

<h3 id="Parameters">Parameters</h3>

<dl>
 <dt>callback</dt>
 <dd>A callback function that will be called every time a new frame of the <code>VRDisplay</code> presentation is rendered.</dd>
</dl>

<h3 id="Return_value">Return value</h3>

<p>A long representing the handle of the <code>requestAnimationFrame()</code> call. This can then be passed to a {{domxref("VRDisplay.cancelAnimationFrame()")}} call to unregister the callback.</p>

<h2 id="Examples">Examples</h2>

<pre>TBD.</pre>

<h2 id="Specifications">Specifications</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('WebVR', '#dom-vrdisplay-requestanimationframe', 'requestAnimationFrame()')}}</td>
   <td>{{Spec2('WebVR')}}</td>
   <td>Initial definition</td>
  </tr>
 </tbody>
</table>

<h2 id="Browser_compatibility">Browser compatibility</h2>

{{Compat("api.VRDisplay.requestAnimationFrame")}}

<h2 id="See_also">See also</h2>

<ul>
 <li><a href="/en-US/docs/Web/API/WebVR_API">WebVR API homepage</a>.</li>
 <li><a href="http://mozvr.com/">MozVr.com</a> — demos, downloads, and other resources from the Mozilla VR team.</li>
</ul>