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---
title: OfflineAudoContext.length
slug: Web/API/OfflineAudioContext/length
translation_of: Web/API/OfflineAudioContext/length
---
<p>{{SeeCompatTable}}{{ APIRef("Web Audio API") }}</p>
<p>{{domxref("OfflineAudioContext")}} 接口的 <strong><code>length</code></strong> 属性返回一个代表采样帧的缓冲区大小的整数。</p>
<h2 id="语法">语法</h2>
<pre class="syntaxbox">var length = OfflineAudioContext.length;</pre>
<h3 id="值">值</h3>
<p>一个代表采样帧的缓冲区大小的整数。</p>
<h2 id="标准">标准</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('Web Audio API','#widl-OfflineAudioContext-length','length')}}</td>
<td>{{Spec2('Web Audio API')}}</td>
<td>Initial definition.</td>
</tr>
</tbody>
</table>
<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>Chrome</th>
<th>Firefox (Gecko)</th>
<th>Internet Explorer</th>
<th>Opera</th>
<th>Safari (WebKit)</th>
</tr>
<tr>
<td>Basic support</td>
<td>{{CompatChrome(51.0)}}</td>
<td>{{CompatUnknown}}</td>
<td>{{CompatUnknown}}</td>
<td>{{CompatUnknown}}</td>
<td>{{CompatUnknown}}</td>
</tr>
</tbody>
</table>
</div>
<div id="compat-mobile">
<table class="compat-table">
<tbody>
<tr>
<th>Feature</th>
<th>Android</th>
<th>Android Webview</th>
<th>Firefox Mobile (Gecko)</th>
<th>Firefox OS</th>
<th>IE Mobile</th>
<th>Opera Mobile</th>
<th>Safari Mobile</th>
<th>Chrome for Android</th>
</tr>
<tr>
<td>Basic support</td>
<td>{{CompatNo}}</td>
<td>{{CompatChrome(51.0)}}</td>
<td>{{CompatUnknown}}</td>
<td>{{CompatUnknown}}</td>
<td>{{CompatUnknown}}</td>
<td>{{CompatUnknown}}</td>
<td>{{CompatUnknown}}</td>
<td>{{CompatChrome(51.0)}}</td>
</tr>
</tbody>
</table>
</div>
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