| 1 | /** |
| 2 | * Copyright (c) Meta Platforms, Inc. and affiliates. |
| 3 | * |
| 4 | * This source code is licensed under the MIT license found in the |
| 5 | * LICENSE file in the root directory of this source tree. |
| 6 | * @flow |
| 7 | */ |
| 8 | |
| 9 | import type {RefObject} from 'shared/ReactTypes'; |
| 10 | |
| 11 | // an immutable object with a single mutable value |
| 12 | export function createRef(): RefObject { |
| 13 | const refObject = { |
| 14 | current: null, |
| 15 | }; |
| 16 | if (__DEV__) { |
| 17 | Object.seal(refObject); |
| 18 | } |
| 19 | return refObject; |
| 20 | } |