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

packages/shared/createScope.js

23 строки570 B

Dominic Gannaway

[react-core] Add experimental React Scope component API (#16587)

29 авг 2019, 14:06

29 авг 2019, 14:06bd79be9

/**
 * 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 {ReactScope} from 'shared/ReactTypes';
import {REACT_SCOPE_TYPE} from 'shared/ReactSymbols';

export default function createScope(
  fn: (type: string | Object, props: Object) => boolean,
): ReactScope {
  const scopeComponent = {
    $$typeof: REACT_SCOPE_TYPE,
    fn,
  };
  if (__DEV__) {
    Object.freeze(scopeComponent);
  }
  return scopeComponent;
}