Write motion as code. Resolve any frame as a pure function.

import { createScene, LayoutActor, signal } from "@motionactor/core";

class Card extends LayoutActor {
  progress = signal(0);

  *reveal({ duration }) {
    yield* this.progress.tween(1, duration);
  }
}

const compiled = createScene(function* (ctx) {
  const card = ctx.spawn(Card);

  yield* card.reveal({ duration: 1 }); // 30 frames at 30fps
  yield* ctx.wait(1);                  // 30 more

  return { card };
});

compiled.at(15).scene.card.progress; // 0.5 — no playback, no side effects
compiled.at(15).scene.card.progress; // 0.5 — every single time