Function shouldAddViewToDom

packages/core/src/render3/view_manipulation.ts:80–87

(
  tNode: TNode,
  dehydratedView?: DehydratedContainerView | null,
)

 * block (in which case view contents was re-created, thus needing insertion).
 */
export function shouldAddViewToDom(
  tNode: TNode,
  dehydratedView?: DehydratedContainerView | null,
): boolean {
  return (
    !dehydratedView || dehydratedView.firstChild === null || hasInSkipHydrationBlockFlag(tNode)
  );
}