githubmr/facebook-react: The library for web and native user interfaces.

packages/react/src/ReactCreateRef.js

20 строк459 B

Héctor Ramos

Drop the year from Facebook copyright headers and the LICENSE file. (#13593)

08 сен 2018, 01:11

08 сен 2018, 01:11b87aabd

/**
 * Copyright (c) Facebook, Inc. and its affiliates.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 * @flow
 */

import type {RefObject} from 'shared/ReactTypes';

// an immutable object with a single mutable value
export function createRef(): RefObject {
  const refObject = {
    current: null,
  };
  if (__DEV__) {
    Object.seal(refObject);
  }
  return refObject;
}