WebGLRenderingContext.canvas
Baseline Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.
WebGLRenderingContext.canvas
只读属性,对 HTMLCanvasElement
和 OffscreenCanvas
对象的引用。如果绘图上下文没有相关联的 <canvas>
元素或 OffscreenCanvas
对象,值为 null
。
语法
gl.canvas;
返回值
示例
Canvas 元素
指定 <canvas>
元素:
html
<canvas id="canvas"></canvas>
你可以通过 canvas 得到一个从 WebGLRenderingContext
返回的引用:
js
var canvas = document.getElementById("canvas");
var gl = canvas.getContext("webgl");
gl.canvas; // HTMLCanvasElement
离屏 Canvas
下面是一个使用试验阶段 OffscreenCanvas
对象的示例:
js
var offscreen = new OffscreenCanvas(256, 256);
var gl = offscreen.getContext("webgl");
gl.canvas; // OffscreenCanvas
规范
Specification |
---|
WebGL Specification # DOM-WebGLRenderingContext-canvas |
浏览器兼容性
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