Function getNgContainerSize

packages/core/src/hydration/utils.ts:450–461

(hydrationInfo: DehydratedView, index: number)

 * container host node, e.g. <ng-container *ngIf>).
 */
export function getNgContainerSize(hydrationInfo: DehydratedView, index: number): number | null {
  const data = hydrationInfo.data;
  let size = data[ELEMENT_CONTAINERS]?.[index] ?? null;
  // If there is no serialized information available in the `ELEMENT_CONTAINERS` slot,
  // check if we have info about view containers at this location (e.g.
  // `<ng-container *ngIf>`) and use container size as a number of root nodes in this
  // element container.
  if (size === null && data[CONTAINERS]?.[index]) {
    size = calcSerializedContainerSize(hydrationInfo, index);
  }
  return size;
}

export function isSerializedElementContainer(
  hydrationInfo: DehydratedView,