checkandupdatefunctionexample.ts

function checkAndUpdate(view: ViewData, nodeIndex: number, ...): boolean {  
  switch (view.def.nodes[nodeIndex].flags & NodeFlags.Types) {
    case NodeFlags.TypeElement:
      return checkAndUpdateElement(view, nodeDef, ...);
    case NodeFlags.TypeText:
      return checkAndUpdateText(view, nodeDef, ...);
    case NodeFlags.TypeDirective:
      return checkAndUpdateDirective(view, nodeDef, ...);
  }
}