@base-ui/react/esm/utils/useIsHydrating.js

Base UI is a library of headless ('unstyled') React components and low-level hooks. You gain complete control over your app's CSS and accessibility features.

import { useSyncExternalStore } from 'use-sync-external-store/shim';
import { NOOP } from "../internals/noop.js";
function subscribe() {
  return NOOP;
}
function getSnapshot() {
  return false;
}
function getServerSnapshot() {
  return true;
}

/**
 * Returns `true` while React is hydrating server-rendered markup and `false`
 * for fresh client-only mounts.
 */
export function useIsHydrating() {
  return useSyncExternalStore(subscribe, getSnapshot, getServerSnapshot);
}