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

Type

TransitionClass

vfx-js/src/transition/types.ts:68 ↗
import type { TransitionClass } from "@vfx-js/core";

A transition class. Core makes one instance per container with new Class(params).

type TransitionClass<P = never> = (params?: P) => Transition