This is an experimental technology
Because this technology's specification has not stabilized, check the compatibility table for the proper prefixes to use in various browsers. Also note that the syntax and behavior of an experimental technology is subject to change in future versions of browsers as the spec changes.
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
Currently drafted as a proposal: OffscreenCanvas.
Browser compatibility
| Feature | Chrome | Firefox (Gecko) | Internet Explorer | Opera | Safari |
|---|---|---|---|---|---|
| Basic support | Not supported | 46 (46) [1] | Not supported | Not supported | Not supported |
| Feature | Android | Firefox Mobile (Gecko) | IE Mobile | Opera Mobile | Safari Mobile |
|---|---|---|---|---|---|
| Basic support | Not supported | 46.0 (46) [1] | 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
OffscreenCanvas, the interface this constructor belongs to.