react-native/Libraries/Utilities/DebugEnvironment.js

A framework for building native apps using React

/**
 * 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.
 *
 * @format
 * @flow strict
 */

export let isAsyncDebugging: boolean = false;

if (__DEV__) {
  // These native interfaces don't exist in asynchronous debugging environments.
  isAsyncDebugging = !global.nativeCallSyncHook && !global.RN$Bridgeless;
}