docs: function enterView(newView, host) {
      var oldView = viewData;
      directives = newView && newView[DIRECTIVES];
      tView = newView && newView[TVIEW];
      creationMode = newView && (newView[FLAGS] & 1 /* CreationMode */) === 1 /* CreationMode */;
      firstTemplatePass = newView && tView.firstTemplatePass;
      renderer = newView && newView[RENDERER];
      if (host != null) {
          previousOrParentNode = host;
          isParent = true;
      }
      viewData = newView;
      currentQueries = newView && newView[QUERIES];
      return oldView;
  }