create-expo-module/src/utils/fetch.ts

The script to create the Expo module

import { env } from 'node:process';

/**
 * Wrap fetch in an assertion check to ensure fetch is available.
 * @todo(cedric): drop when supporting a minimum Node version that does not disable `fetch`.
 */
function wrapFetchWithAssert(fetchFunction?: typeof globalThis.fetch): typeof globalThis.fetch {
  return (...args) => {
    if (!fetchFunction) {
      if (env.NODE_OPTIONS?.includes('--no-experimental-fetch')) {
        throw new Error(
          'NODE_OPTIONS="--no-experimental-fetch" is not supported, Node.js built-in fetch is required to continue.'
        );
      }

      throw new Error(
        'Node.js built-in Fetch is not available. Ensure that the Fetch API, first available in Node.js 18, is enabled.'
      );
    }

    return fetchFunction(...args);
  };
}

/** Export a fetch method that ensures fetch is available */
export const fetch = wrapFetchWithAssert(globalThis.fetch);