Web/API/CanvasCaptureMediaStreamTrack/canvas

The CanvasCaptureMediaStreamTrack canvas read-only property returns the HTMLCanvasElement from which frames are being captured.

Syntax

var elt = stream.canvas;

Value

An HTMLCanvasElement indicating the canvas which is the source of the frames being captured.

Example

// Find the canvas element to capture
var canvasElt = document.getElementsByTagName("canvas")[0];

// Get the stream
var stream = canvasElt.captureStream(25); // 25 FPS

// Do things to the stream
...

// Obtain the canvas associated with the stream
var canvas = stream.canvas;

Specifications

Specification	Status	Comment
Media Capture from DOM ElementsThe definition of 'CanvasCaptureMediaStreamTrack.canvas' in that specification.	Working Draft	Initial definition

Browser compatibility

Update compatibility data on GitHub

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
`canvas` Experimental'	Chrome No support No	Edge No support No	Firefox Full support 41 Disabled' Full support 41 Disabled' Disabled' From version 41: this feature is behind the `canvas.capturestream.enabled` preference (needs to be set to `true`). To change preferences in Firefox, visit about:config.	IE No support No	Opera No support No	Safari No support No	WebView Android No support No	Chrome Android No support No	Firefox Android Full support 41 Disabled' Full support 41 Disabled' Disabled' From version 41: this feature is behind the `canvas.capturestream.enabled` preference (needs to be set to `true`). To change preferences in Firefox, visit about:config.	Opera Android No support No	Safari iOS No support No	Samsung Internet Android No support No

Legend

Full support: Full support
No support: No support
Experimental. Expect behavior to change in the future.': Experimental. Expect behavior to change in the future.
User must explicitly enable this feature.': User must explicitly enable this feature.