Your system asks for reduced motion, so VFX-JS draws nothing. Demos on this site show plain HTML.
Type
EffectQuad
vfx-js/src/types.ts:751 ↗import type { EffectQuad } from "@vfx-js/core";Opaque handle for the default fullscreen quad.
ctx.draw() uses it by default when geometry is omitted.
See EffectContext.quad for details.
Properties
__brand
readonly __brand: "EffectQuad"