Function animatedAncestors

packages/cli/src/commands/keyframes.ts:470–484

(doc: Document, target: string, animated: string[])

// Animated-target selectors of `target`'s DOM ancestors (in order, parent-first).
function animatedAncestors(doc: Document, target: string, animated: string[]): string[] {
  let el: Element | null = null;
  try {
    el = doc.querySelector(target);
  } catch {
    return [];
  }
  const out: string[] = [];
  for (let n = el?.parentElement ?? null; n; n = n.parentElement) {
    for (const sel of animated) {
      if (sel !== target && !out.includes(sel) && safeMatches(n, sel)) out.push(sel);
    }
  }
  return out;
}

// Compact extent summary of an element's motion: each animated property's min..max
// across all its keyframes. Ranges (not endpoints) so a CLOSED loop — a figure-8