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

Specification Status Comment
WebGL 1.0
The definition of 'WebGLRenderingContext.canvas' in that specification.
Recommendation Initial definition.

Browser compatibility

Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari
Basic support 9 4.0 (2.0) 11 12 5.1
OffscreenCanvas Not supported 44 (44) [1] Not supported Not supported Not supported
Feature Android Chrome for Android Firefox Mobile (Gecko) IE Mobile Opera Mobile Safari Mobile
Basic support (Yes) 25 (Yes) (Yes) 12 8.1
OffscreenCanvas Not supported 44 (44) [1] Not supported Not supported Not supported Not supported

[1] This feature is behind a feature preference setting. In about:config, set gfx.offscreencanvas.enabled to true.

See also

License

© 2016 Mozilla Contributors
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-us/docs/web/api/webglrenderingcontext/canvas

Property Read-only WebGL WebGLRenderingContext