WebIDLpedia

Definition

HTML Standard defines OffscreenCanvas

[Exposed=(Window,Worker), Transferable]
interface OffscreenCanvas : EventTarget {
  constructor([EnforceRange] unsigned long long width, [EnforceRange] unsigned long long height);

  attribute [EnforceRange] unsigned long long width;
  attribute [EnforceRange] unsigned long long height;

  OffscreenRenderingContext? getContext(OffscreenRenderingContextId contextId, optional any options = null);
  ImageBitmap transferToImageBitmap();
  Promise<Blob> convertToBlob(optional ImageEncodeOptions options = {});

  attribute EventHandler oncontextlost;
  attribute EventHandler oncontextrestored;
};

Methods and attributes that return objects implementing OffscreenCanvas

• OffscreenCanvas()
• HTMLCanvasElement.transferControlToOffscreen()
• ImageBitmapRenderingContext.canvas
• OffscreenCanvasRenderingContext2D.canvas
• WebGLRenderingContextBase.canvas
• GPUCanvasContext.canvas

Referring IDL interfaces/dictionaries

• GPUCanvasContext
• HTMLCanvasElement
• ImageBitmapRenderingContext
• OffscreenCanvasRenderingContext2D
• WebGLRenderingContextBase

Referring specifications

• WebGL Specification refers to OffscreenCanvas
• WebGPU refers to OffscreenCanvas