Method fetch

third_party/subscriptions-project/swg.js:13435–13452

* @param {string} input URL * @param {?FetchInitDef} init Fetch options object. * @return {!Promise<!FetchResponse>}

(input, init)

   * @return {!Promise<!FetchResponse>}
   */
  fetch(input, init) {
    init = setupInit(init);
    return this.fetch_(input, init)
      .catch((reason) => {
        /*
         * If the domain is not valid for SwG we return 404 without
         * CORS headers and the browser throws a CORS error.
         * We include some helpful text in the message to point the
         * publisher towards the real problem.
         */
        const targetOrigin = parseUrl(input).origin;
        throw new Error(
          `XHR Failed fetching (${targetOrigin}/...): (Note: a CORS error above may indicate that this publisher or domain is not configured in Publisher Center. The CORS error happens becasue 4xx responses do not set CORS headers.)`,
          reason && reason.message
        );
      })
      .then((response) => assertSuccess(response));
  }
}

/**