Function isDisconnectedRNode

packages/core/src/hydration/node_lookup_utils.ts:69–71

(rNode: RNode | null)

 * only use internal data structures and state to compute this information.
 */
export function isDisconnectedRNode(rNode: RNode | null) {
  return !!rNode && !(rNode as Node).isConnected;
}

/**
 * Locate a node in an i18n tree that corresponds to a given instruction index.