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authorPeter Bengtsson <mail@peterbe.com>2020-12-08 14:40:17 -0500
committerPeter Bengtsson <mail@peterbe.com>2020-12-08 14:40:17 -0500
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+---
+title: WebGLRenderingContext.isShader()
+slug: Web/API/WebGLRenderingContext/isShader
+tags:
+ - API
+ - Method
+ - Reference
+ - WebGL
+ - WebGLRenderingContext
+translation_of: Web/API/WebGLRenderingContext/isShader
+---
+<div>{{APIRef("WebGL")}}</div>
+
+<p><a href="/en-US/docs/Web/API/WebGL_API">WebGL API</a> 中的 <strong><code>WebGLRenderingContext.isShader()</code></strong> 方法,在传入的 {{domxref("WebGLShader")}} 有效时返回 <code>true</code> ,否则返回 <code>false</code> 。</p>
+
+<h2 id="语法">语法</h2>
+
+<pre class="syntaxbox">GLboolean <var>gl</var>.isShader(<var>shader</var>);
+</pre>
+
+<h3 id="参数">参数</h3>
+
+<dl>
+ <dt>shader</dt>
+ <dd>需要校验的 {{domxref("WebGLShader")}} </dd>
+</dl>
+
+<h3 id="返回值">返回值</h3>
+
+<p>用来表明 shader 是否有效的 {{domxref("GLboolean")}} 对象</p>
+
+<h2 id="示例">示例</h2>
+
+<h3 id="校验一个_Shader">校验一个 Shader</h3>
+
+<pre class="brush: js">var canvas = document.getElementById('canvas');
+var gl = canvas.getContext('webgl');
+var shader = gl.createShader(gl.VERTEX_SHADER);
+
+// ...
+
+gl.isShader(shader);
+</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', "#5.14.9", "isShader")}}</td>
+ <td>{{Spec2('WebGL')}}</td>
+ <td>Initial definition.</td>
+ </tr>
+ <tr>
+ <td>{{SpecName('OpenGL ES 2.0', "glIsShader.xml", "glIsShader")}}</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 class="hidden">The compatibility table in this page is generated from structured data. If you'd like to contribute to the data, please check out <a href="https://github.com/mdn/browser-compat-data">https://github.com/mdn/browser-compat-data</a> and send us a pull request.</p>
+
+<p>{{Compat("api.WebGLRenderingContext.isShader")}}</p>
+
+<h2 id="参阅">参阅</h2>
+
+<ul>
+ <li>{{domxref("WebGLRenderingContext.createShader()")}}</li>
+ <li>{{domxref("WebGLRenderingContext.deleteShader()")}}</li>
+</ul>