/**
 * Either flavor of 2D canvas the chart code may paint to. The chart's
 * gridline and chrome canvases are `OffscreenCanvas` once the Host
 * transfers rendering control to the Renderer (which it does in
 * `LocalTransport` to validate that the chart code is DOM-free for
 * worker mode). The GL canvas is also `HTMLCanvasElement | OffscreenCanvas`
 * via WebGL's `gl.canvas`.
 */
export type Canvas2D = HTMLCanvasElement | OffscreenCanvas;
/**
 * 2D rendering context for either canvas flavor. The `OffscreenCanvas`
 * variant is missing only `getContextAttributes` and `drawFocusIfNeeded` —
 * neither used by the chart render paths.
 */
export type Context2D = CanvasRenderingContext2D | OffscreenCanvasRenderingContext2D;