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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: WebGLContextEvent
+slug: Web/API/WebGLContextEvent
+translation_of: Web/API/WebGLContextEvent
+---
+<div>{{APIRef("WebGL")}}</div>
+
+<p><strong>WebContextEvent</strong> 接口属于 <a href="/en-US/docs/Web/API/WebGL_API">WebGL API</a> 的一部分,同时也是生成用来对 WebGL 渲染上下文作响应的事件接口。</p>
+
+<h2 id="继承">继承</h2>
+
+<p><em><em>此接口从它的父接口 {{domxref("Event")}}继承属性和方法。</em></em></p>
+
+<p>{{InheritanceDiagram}}</p>
+
+<h2 id="属性">属性</h2>
+
+<p><em><em>此接口从它的父接口 {{domxref("Event")}}继承属性。</em></em></p>
+
+<dl>
+ <dt>{{domxref("WebGLContextEvent.statusMessage")}}</dt>
+ <dd>一个包含事件额外信息的只读属性。</dd>
+</dl>
+
+<h2 id="方法">方法</h2>
+
+<p><em>此接口本身并没有定义任何方法,而是<em>从它的父接口 {{domxref("Event")}}继承方法。</em></em></p>
+
+<h2 id="示例">示例</h2>
+
+<p>使用 {{domxref("WEBGL_lose_context")}} 插件, 你可以模拟 {{Event("webglcontextlost")}} 和 {{Event("webglcontextrestored")}} 事件:</p>
+
+<pre class="brush: js">var canvas = document.getElementById('canvas');
+var gl = canvas.getContext('webgl');
+
+canvas.addEventListener('webglcontextlost', function(e) {
+ console.log(e);
+}, false);
+
+gl.getExtension('WEBGL_lose_context').loseContext();
+
+// 记录了 "webglcontextlost" 类型的 WebGLContextEvent 事件
+</pre>
+
+<h2 id="规范">规范</h2>
+
+<table class="standard-table">
+ <tbody>
+ <tr>
+ <th scope="col">规范</th>
+ <th scope="col">状态</th>
+ <th scope="col">注释</th>
+ </tr>
+ <tr>
+ <td>{{SpecName('WebGL', "#5.15", "WebGLContextEvent")}}</td>
+ <td>{{Spec2('WebGL')}}</td>
+ <td>Initial definition.</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.WebGLContextEvent")}}</p>
+
+<h2 id="相关内容">相关内容</h2>
+
+<ul>
+ <li>{{domxref("WebGLRenderingContext.isContextLost()")}}</li>
+ <li>{{domxref("WEBGL_lose_context")}}, {{domxref("WEBGL_lose_context.loseContext()")}}, {{domxref("WEBGL_lose_context.restoreContext()")}}</li>
+ <li>事件: <a href="/en-US/docs/Web/API/HTMLCanvasElement/webglcontextlost_event">webglcontextlost</a>, <a href="/en-US/docs/Web/API/HTMLCanvasElement/webglcontextrestored_event">webglcontextrestored</a>, <a href="/en-US/docs/Web/API/HTMLCanvasElement/webglcontextcreationerror_event">webglcontextcreationerror</a></li>
+</ul>