OffscreenCanvas class

Experimental: This is an experimental technologyCheck the Browser compatibility table carefully before using this in production. The interface provides a canvas that can be rendered off screen. It is available in both the window and worker contexts. Note: This feature is available in Web Workers

EventTarget

OffscreenCanvas

Implemented types

• EventTarget

Available extensions

• PropsEventTarget
• PropsOffscreenCanvas

Annotations

• @experimental
• @JS()
• @staticInterop

Constructors

OffscreenCanvas(int width, int height)

factory

Properties

hashCode → int

The hash code for this object.

no setter, inherited

height ↔ int

Available on OffscreenCanvas, provided by the PropsOffscreenCanvas extension

getter/setter pair

oncontextlost ↔ EventHandlerNonNull<Event>?

Available on OffscreenCanvas, provided by the PropsOffscreenCanvas extension

getter/setter pair

oncontextrestored ↔ EventHandlerNonNull<Event>?

Available on OffscreenCanvas, provided by the PropsOffscreenCanvas extension

getter/setter pair

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

width ↔ int

Available on OffscreenCanvas, provided by the PropsOffscreenCanvas extension

getter/setter pair

Methods

addEventListener(String type, EventListener? callback, [dynamic options]) → void

Available on EventTarget, provided by the PropsEventTarget extension

convertToBlob([ImageEncodeOptions? options]) → Future<Blob>

Available on OffscreenCanvas, provided by the PropsOffscreenCanvas extension

dispatchEvent(Event event) → bool

Available on EventTarget, provided by the PropsEventTarget extension

getContext(OffscreenRenderingContextId contextId, [dynamic options]) → dynamic

Available on OffscreenCanvas, provided by the PropsOffscreenCanvas extension

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

removeEventListener(String type, EventListener? callback, [dynamic options]) → void

Available on EventTarget, provided by the PropsEventTarget extension

toString() → String

A string representation of this object.

inherited

transferToImageBitmap() → ImageBitmap

Available on OffscreenCanvas, provided by the PropsOffscreenCanvas extension

Operators

operator ==(Object other) → bool

The equality operator.

inherited