openOrClosedShadowRoot method
Gets the open shadow root or the closed shadow root hosted by the
specified element. If the element doesn't attach the shadow root, it will
return null.
returns
See https://developer.mozilla.org/en-US/docs/Web/API/ShadowRoot
Implementation
Map openOrClosedShadowRoot(JSObject element) {
return $js.chrome.dom.openOrClosedShadowRoot(element).toDartMap();
}