react-native/Libraries/Utilities/DebugEnvironment.js

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/**
* Copyright (c) 2013-present, Facebook, Inc.
* All rights reserved.
*
* This source code is licensed under the BSD-style license found in the
* LICENSE file in the root directory of this source tree. An additional grant
* of patent rights can be found in the PATENTS file in the same directory.
*
* @providesModule DebugEnvironment
* @flow
*/
'use strict';
module.exports = {
// When crippled, synchronous JS function calls to native will fail.
isCrippledMode: __DEV__ && !global.nativeCallSyncHook,
};