Web/API/CanvasRenderingContext2D/drawWidgetAsOnScreen

Non-standard This feature is non-standard and is not on a standards track. Do not use it on production sites facing the Web: it will not work for every user. There may also be large incompatibilities between implementations and the behavior may change in the future.

The non-standard and internal only CanvasRenderingContext2D.drawWidgetAsOnScreen() method of the Canvas 2D API renders the root widget of a window into the canvas. Unlike drawWindow(), this API uses the operating system to snapshot the widget on-screen, rather than reading from Gecko's own compositor.

This API cannot be used by Web content. It is only supported on Windows, only on widgets that use OMTC, and only from within the chrome process.

Syntax

void ctx.drawWidgetAsOnScreen(window);

Parameters

window: The Window to render.

Specifications

Not part of any current specification or draft. This is a non-standard and internal only API.

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
`drawWidgetAsOnScreen` Non-standard'	Chrome No support No	Edge No support No	Firefox Full support 41	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	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
Non-standard. Expect poor cross-browser support.': Non-standard. Expect poor cross-browser support.