Desynchronized 2D canvasLimited availability
The optional desynchronized parameter of a canvas's getContext() method permits the browser to draw a 2D canvas independently of the event loop. This can reduce drawing latency.
Not yet supported in all major browsers — check the table and provide a fallback.
Browser support
DesktopChrome
1–80Not supported
81+Supportedsince Apr 7, 2020
Current: 155Edge
12–18Not supported
79+Supportedsince Jan 15, 2020
Current: 154Firefox
✕Not supportedup to 157
Current: 157Safari
1–14.1Not supported
15+Supportedsince Sep 20, 2021
Current: 27MobileChrome Android
18–74Not supported
75+Supportedsince Jun 4, 2019
Current: 155Firefox Android
✕Not supportedup to 157
Current: 157Safari iOS
1–14.5Not supported
15+Supportedsince Sep 20, 2021
Current: 27How to use
Not supported in Firefox, Firefox Android. Use feature detection below and provide a fallback (or a polyfill) for those browsers.
Example
Full syntax and examples are on MDN — see the links below.
Feature detection
JS · check before using
if ("HTMLCanvasElement" in globalThis && "getContext" in HTMLCanvasElement.prototype) {
// HTMLCanvasElement.getContext is available
}