/**

 * Copyright (c) Meta Platforms, Inc. and affiliates.

 *

 * This source code is licensed under the MIT license found in the

 * LICENSE file in the root directory of this source tree.

 *

 * @flow

 */

export function useSyncExternalStore<T>(

  subscribe: (() => void) => () => void,

  getSnapshot: () => T,

  getServerSnapshot?: () => T,

): T {

  // Note: The shim does not use getServerSnapshot, because pre-18 versions of

  // React do not expose a way to check if we're hydrating. So users of the shim

  // will need to track that themselves and return the correct value

  // from `getSnapshot`.

  return getSnapshot();

}