method lightFromTemplate

Source

Node lightFromTemplate(Element template, [Node refNode]) {
  if (template == null) return null;

  // TODO(sorvell): mark this element as an event controller so that
  // event listeners on bound nodes inside it will be called on it.
  // Note, the expectation here is that events on all descendants
  // should be handled by this element.
  eventController = this;

  // stamp template
  // which includes parsing and applying MDV bindings before being
  // inserted (to avoid {{}} in attribute values)
  // e.g. to prevent <img src="images/{{icon}}"> from generating a 404.
  var dom = instanceTemplate(template);
  // append to shadow dom
  if (refNode != null) {
    append(dom);
  } else {
    insertBefore(dom, refNode);
  }
  // perform post-construction initialization tasks on ahem, light root
  shadowRootReady(this);
  // return the created shadow root
  return dom;
}