WebGLRenderingContext: canvas property

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.

Note: This feature is available in Web Workers.

The 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 object.

Value

Given this <canvas> element:

html

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

You can get back a reference to it from the WebGLRenderingContext using the canvas property:

const canvas = document.getElementById("canvas");
const gl = canvas.getContext("webgl");
gl.canvas; // HTMLCanvasElement

Example using the experimental OffscreenCanvas object.

const offscreen = new OffscreenCanvas(256, 256);
const gl = offscreen.getContext("webgl");
gl.canvas; // OffscreenCanvas

Specification
WebGL Specification # DOM-WebGLRenderingContext-canvas

This page was last modified on ⁨Jul 1, 2025⁩ by MDN contributors.