2024
1 featuresThe optional willReadFrequently parameter of a canvas's getContext() method permits the browser to optimize for frequent getImageData() calls by avoiding hardware acceleration. Also known as multiple readback.
2023
4 featuresThe reset() method clears a canvas to its initial state.
The createConicGradient() methods draw a conic gradient to a 2D canvas.
The roundRect() methods draw a rounded rectangle to a 2D canvas.
The OffscreenCanvas API provides a canvas that can be drawn to off screen, with no dependencies on the DOM, which can be used to run heavy rendering operations inside a worker context.
2020
1 featuresThe captureStream() method for <canvas> elements returns a MediaStream which includes a CanvasCaptureMediaStreamTrack representing real-time video of the canvas image. You can use this to record the canvas, or send it elsewhere, such as another canvas or WebRTC connection.
2015
2 featuresLimited Availability
5 featuresThe optional alpha parameter of a 2D canvas's getContext() method sets whether the canvas has an alpha transparency channel. If set to false, then this permits the browser to optimize compositing for an opaque canvas.
The optional colorSpace parameter of a 2D canvas's getContext() method chooses the color representation, such as "srgb" or "display-p3".
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.
A <canvas> HTML element with the layoutsubtree attribute can draw descendant elements in its rendering context. You can use it to style and layout text in a canvas, expose canvas content to browser features (like accessibility, translate, or find-in-page), and apply 2D and 3D effects to HTML.
The contextlost event for <canvas> fires when the canvas backing storage is lost, while the contextrestored event fires when it is recreated.