Canvas

The canvas instance, which can be obtained via SelectorQuery.

Reference

Methods

cancelAnimationFrame

Cancels the animation frame request added to the plan by requestAnimationFrame (only supported in WebGL).

Reference

(requestID: number) => void

Property	Type
requestID	number

API Support

API	WeChat Mini-Program	H5	React Native
Canvas.cancelAnimationFrame	✔️

createImageData

Creates an ImageData object. Only supported for use in 2D Canvas.

Reference

() => ImageData

API Support

API	WeChat Mini-Program	H5	React Native
Canvas.createImageData	✔️

createImage

Creates an image object. Supports use in 2D Canvas and WebGL Canvas, but does not support mixing 2D and WebGL methods.

Reference

() => Image

API Support

API	WeChat Mini-Program	H5	React Native
Canvas.createImage	✔️

getContext

Returns the Canvas drawing context.

Reference

(contextType: string) => RenderingContext

Property	Type
contextType	string

API Support

API	WeChat Mini-Program	H5	React Native
Canvas.getContext	✔️

requestAnimationFrame

Executed upon the next redrawing (only supported in WebGL).

Reference

(callback: (...args: any[]) => any) => number

Property	Type	Description
callback	(...args: any[]) => any	执行的 callback

API Support

API	WeChat Mini-Program	H5	React Native
Canvas.requestAnimationFrame	✔️

API Support

API	WeChat Mini-Program	H5	React Native
Canvas.cancelAnimationFrame	✔️
Canvas.createImageData	✔️
Canvas.createImage	✔️
Canvas.getContext	✔️
Canvas.requestAnimationFrame	✔️