Function convertToKeyframesInScript

packages/parsers/src/gsapParser.ts:2546–2597

(
  script: string,
  animationId: string,
  resolvedFromValues?: Record<string, number | string>,
  setDuration = 1,
)

 * the "to" state for `from()` tweens (the values the DOM would resolve to).
 */
export function convertToKeyframesInScript(
  script: string,
  animationId: string,
  resolvedFromValues?: Record<string, number | string>,
  setDuration = 1,
): string {
  let loc = locateAnimationWithFallback(script, animationId);
  if (!loc) return script;

  const anim = loc.target.animation;
  if (anim.keyframes) return script;

  const { fromProps, toProps } = resolveConversionProps(anim, resolvedFromValues);
  const varsArg = loc.target.call.varsArg;
  const originalEase = anim.ease;

  stripEditableAndEase(varsArg);
  insertKeyframesProp(varsArg, fromProps, toProps, originalEase || undefined);

  if (originalEase) {
    setVarsKey(varsArg, "ease", "none");
  }

  // For from() or fromTo(), convert to to()
  if (anim.method === "from" || anim.method === "fromTo") {
    loc.target.call.node.callee.property.name = "to";
    if (anim.method === "fromTo") loc.target.call.node.arguments.splice(1, 1);
  }

  // A static `set` becomes an animatable `to`: flip the method, drop the
  // immediateRender hold marker, and give it a real duration so the keyframes
  // span time. This is what makes a static 3D transform keyframeable.
  if (anim.method === "set") {
    // A GLOBAL `gsap.set(...)` is off-timeline; flipping only the method would
    // emit `gsap.to(...)`, which fires once at load and is NOT on the paused
    // master timeline (the engine can't seek/render it). Re-root it onto the
    // timeline var and add the position arg (a gsap.set has none) so the
    // converted tween is seekable. A `tl.set` already has the right object.
    const calleeObj = loc.target.call.node.callee.object;
    if (anim.global && calleeObj?.type === "Identifier") {
      calleeObj.name = loc.parsed.timelineVar;
      if (loc.target.call.node.arguments.length < 3) {
        loc.target.call.node.arguments.push(parseExpr("0"));
      }
    }
    loc.target.call.node.callee.property.name = "to";
    removeVarsKey(varsArg, "immediateRender");
    setVarsKey(varsArg, "duration", Math.max(0.001, setDuration));
  }

  return recast.print(loc.parsed.ast).code;
}

/**
 * Remove all keyframes from a tween, collapsing to a flat tween with the