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.
Syntax
new OffscreenCanvas(width, height);
Parameters
width- The height of the offscreen canvas.
height- The width of the offscreen canvas.
Examples
Creating a new offscreen canvas and initializing a WebGL context on it:
var offscreen = new OffscreenCanvas(256, 256);
var gl = offscreen.getContext("webgl");
Specifications
| Specification | Status | Comment |
|---|---|---|
| HTML Living Standard The definition of 'OffscreenCanvas()' in that specification. |
Living Standard |
Browser compatibility
The compatibility table on 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.
| Feature | Chrome | Edge | Firefox | Internet Explorer | Opera | Safari |
|---|---|---|---|---|---|---|
| Basic support | No | ? | 461 | No | No | No |
| Feature | Android webview | Chrome for Android | Edge mobile | Firefox for Android | Opera Android | iOS Safari | Samsung Internet |
|---|---|---|---|---|---|---|---|
| Basic support | No | 42 | ? | 461 | No | No | 4.0 |
1. From version 46: this feature is behind the gfx.offscreencanvas.enabled preference. To change preferences in Firefox, visit about:config.
See also
OffscreenCanvas, the interface this constructor belongs to.