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---
title: WebGLRenderingContext.isBuffer()
slug: Web/API/WebGLRenderingContext/isBuffer
translation_of: Web/API/WebGLRenderingContext/isBuffer
---
<div>{{APIRef("WebGL")}}</div>
<p><strong><code>WebGLRenderingContext.isBuffer() </code></strong>是 <a href="/en-US/docs/Web/API/WebGL_API">WebGL API</a> 的方法之一。如果传递的 {{domxref("WebGLBuffer")}} 有效则返回 true，否则返回 false。</p>
<h2 id="句法">句法</h2>
<pre class="syntaxbox">GLboolean <var>gl</var>.isBuffer(<var>buffer</var>);
</pre>
<h3 id="参数">参数</h3>
<dl>
<dt>buffer (缓冲区)</dt>
<dd>需要检查的 {{domxref("WebGLBuffer")}} 。</dd>
</dl>
<h3 id="返回值">返回值</h3>
<p>{{domxref("GLboolean")}} 指示 buffer 是否可用。</p>
<h2 id="示例">示例</h2>
<h3 id="创建一个缓冲区_(buffer)">创建一个缓冲区 (buffer)</h3>
<pre class="brush: js">var canvas = document.getElementById("canvas");
var gl = canvas.getContext("webgl");
var buffer = gl.createBuffer();
gl.isBuffer(buffer);
</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('WebGL', "#5.14.5", "isBuffer")}}</td>
<td>{{Spec2('WebGL')}}</td>
<td>Initial definition.</td>
</tr>
<tr>
<td>{{SpecName('OpenGL ES 2.0', "glIsBuffer.xml", "glIsBuffer")}}</td>
<td>{{Spec2('OpenGL ES 2.0')}}</td>
<td>Man page of the OpenGL API.</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>Edge</th>
<th>Firefox (Gecko)</th>
<th>Internet Explorer</th>
<th>Opera</th>
<th>Safari</th>
</tr>
<tr>
<td>Basic support</td>
<td>{{CompatChrome("9")}}</td>
<td>12</td>
<td>{{CompatGeckoDesktop("2.0")}}</td>
<td>11</td>
<td>{{CompatOpera("12")}}</td>
<td>{{CompatSafari("5.1")}}</td>
</tr>
</tbody>
</table>
</div>
<div id="compat-mobile">
<table class="compat-table">
<tbody>
<tr>
<th>Feature</th>
<th>Android</th>
<th>Chrome for Android</th>
<th>Edge</th>
<th>Firefox Mobile (Gecko)</th>
<th>Firefox OS</th>
<th>IE Mobile</th>
<th>Opera Mobile</th>
<th>Safari Mobile</th>
</tr>
<tr>
<td>Basic support</td>
<td>{{CompatUnknown}}</td>
<td>25</td>
<td>{{CompatVersionUnknown}}</td>
<td>{{CompatGeckoMobile("2.0")}}</td>
<td>1.0</td>
<td>{{CompatUnknown}}</td>
<td>12</td>
<td>8.0</td>
</tr>
</tbody>
</table>
</div>
<h2 id="另见">另见</h2>
<ul>
<li>{{domxref("WebGLRenderingContext.bindBuffer()")}}</li>
<li>{{domxref("WebGLRenderingContext.createBuffer()")}}</li>
<li>{{domxref("WebGLRenderingContext.deleteBuffer()")}}</li>
<li>Other buffers: {{domxref("WebGLFramebuffer")}}, {{domxref("WebGLRenderbuffer")}}</li>
</ul>
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