Your system asks for reduced motion, so VFX-JS draws nothing. Demos on this site show plain HTML.
Type
DuotoneParams
effects/src/duotone.ts:42 ↗import type { DuotoneParams } from "@vfx-js/effects";Properties
color1
color1: Rgba
First tone (shadows).
color2
color2: Rgba
Second tone (highlights).
speed
speed: number
Gradient cycling speed. 0 keeps the mapping static.