dismissBootOverlayImpl function

Implementation

void dismissBootOverlayImpl() {
  final List<web.Element> overlay = <web.Element>[
    ?web.document.querySelector(_loadingSelector),
    ?web.document.getElementById(_backgroundId),
  ];
  for (final web.Element element in overlay) {
    element.classList.add(_fadeOutClass);
  }
  Timer(_fadeOut, () {
    for (final web.Element element in overlay) {
      element.remove();
    }
  });
}