Function copyElementToChildWindow

src/service/custom-element-registry.js:158–161

(parentWin, childWin, name)

 * @param {string} name
 */
export function copyElementToChildWindow(parentWin, childWin, name) {
  const toClass = getExtendedElements(parentWin)[name];
  registerElement(childWin, name, toClass || ElementStub);
}

/**
 * Registers a new custom element with its implementation class.