packages/shared/ReactServerContextRegistry.js

/**
 * 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 {REACT_SERVER_CONTEXT_DEFAULT_VALUE_NOT_LOADED} from 'shared/ReactSymbols';
import ReactSharedInternals from 'shared/ReactSharedInternals';
import {createServerContext} from 'react';

const ContextRegistry = ReactSharedInternals.ContextRegistry;

export function getOrCreateServerContext(globalName: string) {
  if (!ContextRegistry[globalName]) {
    ContextRegistry[globalName] = createServerContext(
      globalName,
      REACT_SERVER_CONTEXT_DEFAULT_VALUE_NOT_LOADED,
    );
  }
  return ContextRegistry[globalName];
}