Your system asks for reduced motion, so VFX-JS draws nothing. Demos on this site show plain HTML.

Function

markHicCanvas

vfx-js/src/hic-canvas.ts:24 ↗
import { markHicCanvas } from "@vfx-js/core";
markHicCanvas(canvas: HTMLCanvasElement, child?: Element | null): void

Mark canvas as an html-in-canvas wrapper and child as drawable.