Function calcNumRootNodes

packages/core/src/hydration/annotate.ts:161–165

* Computes the number of root nodes in a given view * (or child nodes in a given container if a tNode is provided).

(tView: TView, lView: LView, tNode: TNode | null)

 * (or child nodes in a given container if a tNode is provided).
 */
function calcNumRootNodes(tView: TView, lView: LView, tNode: TNode | null): number {
  const rootNodes: unknown[] = [];
  collectNativeNodes(tView, lView, tNode, rootNodes);
  return rootNodes.length;
}

/**
 * Computes the number of root nodes in all views in a given LContainer.