Function stubElementsForDoc

src/service/custom-element-registry.js:126–136

(ampdoc)

 * @param {!./ampdoc-impl.AmpDoc} ampdoc
 */
export function stubElementsForDoc(ampdoc) {
  const extensions = extensionScriptsInNode(ampdoc.getHeadNode());
  extensions.forEach(({extensionId, extensionVersion, script}) => {
    ampdoc.declareExtension(extensionId, extensionVersion);
    script.addEventListener('error', () => markUnresolvedElements(extensionId));
    stubElementIfNotKnown(ampdoc.win, extensionId);
  });
  if (ampdoc.isBodyAvailable()) {
    ampdoc.setExtensionsKnown();
  }
}

/**
 * Stub element if not yet known.