HTMLCanvasElement: transferControlToOffscreen() method

The HTMLCanvasElement.transferControlToOffscreen() method transfers control to an OffscreenCanvas object, either on the main thread or on a worker.

Syntax

js

transferControlToOffscreen()

Parameters

None.

Return value

An OffscreenCanvas object.

Examples

The following example shows how to transfer control to an OffscreenCanvas object on the main thread.

js

const htmlCanvas = document.createElement("canvas");
const offscreen = htmlCanvas.transferControlToOffscreen();
const gl = offscreen.getContext("webgl");

// Some drawing using the gl context…

The following example shows how to transfer control to an OffscreenCanvas object on a worker.

js

const offscreen = document.querySelector("canvas").transferControlToOffscreen();
const worker = new Worker("myworkerurl.js");
worker.postMessage({ canvas: offscreen }, [offscreen]);

Specifications

Specification
HTML Standard
# dom-canvas-transfercontroltooffscreen-dev

Browser compatibility

BCD tables only load in the browser

See also