This is an experimental technology
Check the Browser compatibility table carefully before using this in production.

The OffscreenCanvas() constructor returns a newly instantiated OffscreenCanvas object.


new OffscreenCanvas(width, height);


The height of the offscreen canvas.
The width of the offscreen canvas.


Creating a new offscreen canvas and initializing a WebGL context on it:

var offscreen = new OffscreenCanvas(256, 256);
var gl = offscreen.getContext("webgl");


Specification Status Comment
HTML Living Standard
The definition of 'OffscreenCanvas()' in that specification.
Living Standard  

Browser compatibility

FeatureChromeEdgeFirefoxInternet ExplorerOperaSafari
Basic support No ?461 No No No
FeatureAndroid webviewChrome for AndroidEdge mobileFirefox for AndroidOpera AndroidiOS SafariSamsung Internet
Basic support No42 ?461 No No4.0

1. From version 46: this feature is behind the gfx.offscreencanvas.enabled preference. To change preferences in Firefox, visit about:config.

See also

Document Tags and Contributors

Contributors to this page: fscholz, adria
Last updated by: fscholz,