Function loadScript

3p/3p.js:85–96

(win, url, opt_cb, opt_errorCb)

 * @param {function()=} opt_errorCb
 */
export function loadScript(win, url, opt_cb, opt_errorCb) {
  /** @const {!Element} */
  const s = win.document.createElement('script');
  s.src = url;
  if (opt_cb) {
    s.onload = opt_cb;
  }
  if (opt_errorCb) {
    s.onerror = opt_errorCb;
  }
  win.document.body.appendChild(s);
}

/**
 * Call function in micro task or timeout as a fallback.