Function useIsSSR

packages/react-aria/src/ssr/SSRProvider.tsx:202–210

()

 * until after hydration.
 */
export function useIsSSR(): boolean {
  // In React 18, we can use useSyncExternalStore to detect if we're server rendering or hydrating.
  if (typeof React['useSyncExternalStore'] === 'function') {
    return React['useSyncExternalStore'](subscribe, getSnapshot, getServerSnapshot);
  }

  // eslint-disable-next-line react-hooks/rules-of-hooks
  return useContext(IsSSRContext);
}