WebGLRenderingContext.canvas

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.

Syntax

gl.canvas;

Return value

Either a HTMLCanvasElement or OffscreenCanvas object or null.

Examples

Canvas element

Given this <canvas> element:

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

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

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

Offscreen canvas

Example using the experimental OffscreenCanvas object.

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

Specifications

Browser compatibility

The compatibility table in this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.

1. From version 44.0, this feature is behind the gfx.offscreencanvas.enabled preference (needs to be set to true). To change preferences in Firefox, visit about:config.

See also

• CanvasRenderingContext2D.canvas
• OffscreenCanvas