Function initDisconnectedNodes

packages/core/src/hydration/utils.ts:494–501

(hydrationInfo: DehydratedView)

 * `DehydratedView`. Returns the initialized value.
 */
export function initDisconnectedNodes(hydrationInfo: DehydratedView): Set<number> | null {
  // Check if we are processing disconnected info for the first time.
  if (typeof hydrationInfo.disconnectedNodes === 'undefined') {
    const nodeIds = hydrationInfo.data[DISCONNECTED_NODES];
    hydrationInfo.disconnectedNodes = nodeIds ? new Set(nodeIds) : null;
  }
  return hydrationInfo.disconnectedNodes;
}

/**
 * Checks whether a node is annotated as "disconnected", i.e. not present