Function waitForRender

extensions/amp-mathml/1.0/test/test-amp-mathml.js:90–98

* * @param {HTMLElement} element

(element)

 * @param {HTMLElement} element
 */
async function waitForRender(element) {
  await element.buildInternal();
  const loadPromise = element.layoutCallback();
  await waitFor(
    () => element.shadowRoot.querySelector('iframe'),
    'iframe mounted'
  );
  await loadPromise;
}