WebGLRenderingContext.canvas

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WebGLRenderingContext.canvas property is a read-only reference to the HTMLCanvasElement or OffscreenCanvas object that is associated with the context. It might be null if it is not associated with a <canvas> element or an OffscreenCanvas 对象。

gl.canvas;

Given this <canvas> 元素：

<canvas id="canvas"></canvas>

You can get back a reference to it from the WebGLRenderingContext 使用 canvas 特性：

var canvas = document.getElementById('canvas');
var gl = canvas.getContext('webgl');
gl.canvas; // HTMLCanvasElement

Example using the experimental OffscreenCanvas 对象。

var offscreen = new OffscreenCanvas(256, 256);
var gl = offscreen.getContext('webgl');
gl.canvas; // OffscreenCanvas

规范	状态	注释
WebGL 1.0 The definition of 'WebGLRenderingContext.canvas' in that specification.	推荐	初始定义。