Function extractDimensions

packages/sdk/src/document.ts:176–189

(doc: Document)

// and mutations agree on which element is the composition root.
// fallow-ignore-next-line complexity
function extractDimensions(doc: Document): { width: number | null; height: number | null } {
  const stage = findRoot(doc);
  if (!stage) return { width: null, height: null };
  // data-width/data-height are the runtime's forced override — prefer them.
  const wAttr = stage.getAttribute("data-width");
  const hAttr = stage.getAttribute("data-height");
  const style = (stage as HTMLElement).getAttribute?.("style") ?? "";
  const wm = /width:\s*(\d+)px/.exec(style);
  const hm = /height:\s*(\d+)px/.exec(style);
  return {
    width: wAttr !== null ? parseInt(wAttr, 10) : wm ? parseInt(wm[1] ?? "", 10) : null,
    height: hAttr !== null ? parseInt(hAttr, 10) : hm ? parseInt(hm[1] ?? "", 10) : null,
  };
}

function extractDuration(doc: Document): number | null {
  const root = findRoot(doc) ?? doc.body;