Function raf

core/src/utils/helpers.ts:218–226

(h: FrameRequestCallback)

 * Use only when you know ngzone should not run
 */
export const raf = (h: FrameRequestCallback) => {
  if (typeof __zone_symbol__requestAnimationFrame === 'function') {
    return __zone_symbol__requestAnimationFrame(h);
  }
  if (typeof requestAnimationFrame === 'function') {
    return requestAnimationFrame(h);
  }
  return setTimeout(h);
};

export const hasShadowDom = (el: HTMLElement) => {
  return !!el.shadowRoot && !!(el as any).attachShadow;