puppeteer/packages/puppeteer-core/src/common/fetch.ts

/**
 * Copyright 2020 Google Inc. All rights reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

/**
 * Gets the global version if we're in the browser, else loads the node-fetch module.
 *
 * @internal
 */
export const getFetch = async (): Promise<typeof fetch> => {
  return (globalThis as any).fetch || (await import('cross-fetch')).fetch;
};