Your system asks for reduced motion, so VFX-JS draws nothing. Demos on this site show plain HTML.
Type
ShaderPreset
vfx-js/src/constants.ts:50 ↗import type { ShaderPreset } from "@vfx-js/core";type ShaderPreset =
| "none"
| "uvGradient"
| "rainbow"
| "glitch"
| "rgbGlitch"
| "rgbShift"
| "shine"
| "blink"
| "spring"
| "duotone"
| "tritone"
| "hueShift"
| "sinewave"
| "pixelate"
| "halftone"
| "slitScanReveal"
| "warpReveal"
| "pixelateReveal"
| "focusReveal"
| LegacyRevealPreset
| "invert"
| "grayscale"
| "vignette"
| "chromatic"